CN104506025A - Power converter - Google Patents
Power converter Download PDFInfo
- Publication number
- CN104506025A CN104506025A CN201510018712.0A CN201510018712A CN104506025A CN 104506025 A CN104506025 A CN 104506025A CN 201510018712 A CN201510018712 A CN 201510018712A CN 104506025 A CN104506025 A CN 104506025A
- Authority
- CN
- China
- Prior art keywords
- voltage
- output
- low
- module
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 14
- 230000009466 transformation Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 10
- 230000007935 neutral effect Effects 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 230000001131 transforming effect Effects 0.000 description 3
- 238000009499 grossing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from AC or DC
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a power converter. The power converter comprises a high-voltage alternating current module, a low-voltage direct current module, a power input terminal, a high-voltage output terminal and a low-voltage output terminal; the power converter is connected with a power grid through the power input terminal; the power converter is connected with an electric device through the high-voltage input terminal and the low-voltage output terminal; the high-voltage alternating current module is electrically connected with the low-voltage alternating current module; alternating current signals output from the power grid form into high-voltage alternating current signals after processing through the high-voltage alternating current module and are respectively output to the high-voltage output terminal and the low-voltage direct current module; the low-voltage direct current module rectifies and transforms voltage of the received high-voltage alternating current signals to form into low-voltage direct current signals to output to the output terminal; accordingly, the power converter can achieve synchronous output of the high-voltage alternating current and the low-voltage direct current and satisfy requirements of different electric devices without needing other power converting devices and the integral structure of the power converter simplifies the circuit connection and effectively avoid security accidents caused by complex circuit connection.
Description
Technical Field
The invention relates to the field of power supplies, in particular to a power supply converter.
Background
Currently, power converters generally fall into two categories: the single high-voltage AC output power converter converts the power of a mains supply AC power grid into a plurality of paths of high-voltage AC signals to be output to electric equipment, such as a power strip, and can only provide a high-voltage AC power supply; the single low-voltage dc output power converter converts the power of the commercial ac power grid into low-voltage dc to be output to the electric equipment, such as various mobile terminal chargers, and such power converters can only provide low-voltage dc power. When the types and the number of electrical equipment used simultaneously are large, a plurality of power converters with single high-voltage alternating current output and a power converter with single low-voltage direct current output need to be connected in series, so that the use is very inconvenient, and safety accidents are easily caused due to the complicated and complicated lines in the series connection.
Disclosure of Invention
The invention mainly aims to provide a power converter, and aims to solve the problems of single function and inconvenience in use of the power converter.
In order to achieve the above object, the present invention provides a power converter, which includes a high voltage ac module, a low voltage dc module, a power input terminal, a high voltage output terminal, and a low voltage output terminal, wherein the power converter is connected to a power grid through the power input terminal, the power converter is connected to a power consumption device through the high voltage output terminal and the low voltage output terminal, and the high voltage ac module is electrically connected to the low voltage dc module; after the alternating current signal output by the power grid is processed by the high-voltage alternating current module, a high-voltage alternating current signal is formed and is respectively output to the high-voltage output end and the low-voltage direct current module; the low-voltage direct current module rectifies and transforms the received high-voltage alternating current signal to form a low-voltage direct current signal and outputs the low-voltage direct current signal to a low-voltage output end.
Preferably, the power input end comprises a live wire, a zero wire and a ground wire; the high-voltage output end comprises a plurality of high-voltage output ports; the low-voltage output end comprises a plurality of low-voltage output ports; the high-voltage alternating current module comprises a plurality of high-voltage alternating current units which are sequentially and electrically connected and correspond to the high-voltage output ports one by one; the alternating current signals output by the power grid are output to each high-voltage alternating current unit through the live wire, the zero line and the ground wire, and then high-voltage alternating current signals are output to the electric equipment through the corresponding high-voltage output ports; and a high-voltage alternating current signal output by any one high-voltage alternating current unit is transmitted to the low-voltage direct current unit, and then a low-voltage direct current signal is output to the electric equipment through the low-voltage output port.
Preferably, the high-voltage ac module further includes a switch and an anti-surge module, and the switch is connected in series between a live wire of the power input end and a live wire input end of the anti-surge module; the zero line input end of the anti-surge module is connected with the zero line of the power input end, and the ground wire end of the anti-surge module is connected with the ground wire of the power input end; the high-voltage alternating current unit comprises a live wire terminal, a zero wire terminal and a ground wire terminal, the live wire terminal is connected with the live wire output end of the anti-surge module after being sequentially connected, the zero wire terminal is connected with the zero wire output end of the anti-surge module after being sequentially connected, and the ground wire terminal is connected with the ground wire of the power input end after being sequentially connected.
Preferably, the low-voltage dc module includes an EMI unit, a rectification filter unit, and a transformer unit, an input end of the EMI unit is connected to an output end of the high-voltage ac module, an output end of the EMI unit is connected to an input end of the rectification filter unit, an output end of the rectification filter unit is connected to an input end of the voltage transformation modulation unit, and an output end of the voltage transformation modulation unit corresponds to the low-voltage output port; the high-voltage alternating current signal output by the high-voltage alternating current module is subjected to common mode rejection processing by the EMI unit, then is transmitted to the rectification filter unit to be rectified and filtered to form a high-voltage direct current signal, and is subjected to voltage transformation and PWM (pulse width modulation) processing by the transformer modulation unit to form a low-voltage direct current signal which is output to electric equipment.
Preferably, the EMI unit includes a first EMI filter, a first capacitor, and a second EMI filter, a first input end of the first EMI filter is connected to any of the live line terminals as a live line input end of the low-voltage dc module, a second input end of the first EMI filter is connected to any of the zero line terminals as a zero line input end of the low-voltage dc module, the first capacitor is connected between a first output end and a second output end of the first EMI filter, a first input end of the second EMI filter is connected to a first output end of the first EMI filter, and a second input end of the second EMI filter is connected to a second output end of the first EMI filter.
Preferably, the rectifying and filtering unit includes a rectifying bridge and a first filtering capacitor, a first input terminal of the rectifying bridge is connected with a first input terminal of the second EMI filter, and a second input terminal of the rectifying bridge is connected with a second input terminal of the second EMI filter; the positive electrode of the first filter capacitor is connected with the first output end of the rectifier bridge, and the negative electrode of the first filter capacitor is connected with the second output end of the rectifier bridge.
Preferably, the voltage transformation modulation unit comprises a transformer unit, a PWM modulation unit, and an MOS transistor, the transformer unit comprises a primary coil, an auxiliary coil, and a secondary coil, the primary coil and the auxiliary coil are located on a primary side of the transformer unit, and the secondary coil is located on a secondary side of the transformer unit; one end of the primary coil is connected with the positive electrode of the second filter capacitor, and the other end of the primary coil is connected with the drain electrode of the MOS tube; one end of the auxiliary coil is connected with the starting end of the PWM modulation unit, and the other end of the auxiliary coil is grounded; one end of the secondary coil is connected with the power supply end of each low-voltage output port respectively, and the other end of the secondary coil is grounded after being connected with the grounding end of each low-voltage output port; the starting end of the PWM modulation unit is connected to the anode of the second filter capacitor through a current-limiting resistor, and the output end of the PWM modulation unit is connected with the grid electrode of the MOS tube; and the source electrode of the MOS tube is grounded.
Preferably, the low-voltage dc module further includes a feedback unit, the feedback unit includes a first voltage-regulator tube and an optocoupler, an anode of the first voltage-regulator tube is connected to a power supply end of each low-voltage output port, a cathode of the first voltage-regulator tube is connected to a light-emitting diode of the optocoupler, one end of a phototriode of the optocoupler is connected to a feedback end of the PWM modulation unit, and the other end of the phototriode of the optocoupler is grounded.
Preferably, the low-voltage dc module further includes an output voltage adjusting module, the output voltage adjusting module includes a plurality of output voltage adjusting units, a power end of the output voltage adjusting unit is connected to a power end of the low-voltage output port, a first detection end of the output voltage adjusting unit is connected to a positive electrode of a charging end of the low-voltage output port, and a first detection end of the output voltage adjusting unit is connected to a negative electrode of the charging end of the low-voltage output port; the output voltage adjusting unit correspondingly adjusts the output voltage to the low-voltage output port according to the current values detected by the first detection end and the second detection end.
Preferably, the power converter includes a casing, the casing includes a face shell and a bottom shell, the face shell is detachably connected with the bottom shell, the bottom shell is in a rectangular plate shape, the face shell includes a panel, and a first side plate, a second side plate, a third side plate and a fourth side plate which are vertically connected with the panel, the first side plate is arranged opposite to the second side plate, the third side plate is arranged opposite to the fourth side plate, and the first side plate, the second side plate, the third side plate and the fourth side plate are sequentially connected end to end and form an accommodating space with the panel; the high-voltage alternating current module and the low-voltage direct current module are contained in the containing space, the power input end is arranged on the first side plate, the high-voltage output port array is arranged on the panel, and the low-voltage output port array is arranged on the second side plate.
According to the power converter provided by the invention, the high-voltage alternating current module and the low-voltage direct current module are simultaneously arranged in the shell, so that the power converter can conveniently meet different voltage requirements required by various electric equipment, and the simultaneous output of high-voltage alternating current and low-voltage direct current can be realized without externally connecting other power switching equipment; and the power converter with the integrated structure simplifies the line connection of power switching, is convenient for users to use, and can also avoid safety accidents caused by complex line connection.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic structural view illustrating an opened state of the housing according to the first embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another embodiment of a high pressure outlet according to the present invention;
FIG. 4 is a schematic structural diagram of another embodiment of a high pressure outlet according to the present invention;
FIG. 5 is a schematic structural diagram of another embodiment of a high pressure outlet according to the present invention;
FIG. 6 is a schematic structural diagram of functional modules of the low voltage DC module according to the present invention;
fig. 7 is a circuit connection diagram of the low voltage dc module according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a power converter.
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a first embodiment of the present invention; fig. 2 is a schematic structural view of the first embodiment of the present invention in an open state. In the present embodiment, an example of 8 groups of high voltage output ports 110 and 5 groups of low voltage output ports 120 is described, and the specific number of the high voltage ac units 110 and the low voltage output ports 120 is not limited herein. The power converter comprises a high-voltage alternating current module 200, a low-voltage direct current module 300, a power input end 400, a high-voltage output end and a low-voltage output end, wherein the power converter is connected with a power grid through the power input end 400, is connected with electric equipment through the high-voltage output end and the low-voltage output end, and the high-voltage alternating current module 200 is electrically connected with the low-voltage direct current module 300; after the ac signal output by the power grid is processed by the high-voltage ac module 200, a high-voltage ac signal is formed and is respectively output to the high-voltage output terminal and the low-voltage dc module 300; the low-voltage dc module 300 rectifies and transforms the received high-voltage ac signal to form a low-voltage dc signal, and outputs the low-voltage dc signal to the low-voltage output terminal.
Specifically, the power converter includes a housing, the housing includes a face shell 100 and a bottom shell (not shown), the face shell 100 is detachably connected to the bottom shell, the bottom shell is in a rectangular plate shape, the face shell 100 includes a panel 130, and a first side plate 140, a second side plate 150, a third side plate 160, and a fourth side plate (not shown) vertically connected to the panel 130, the first side plate 140 is disposed opposite to the second side plate 150, the third side plate 160 is disposed opposite to the fourth side plate, the first side plate 140, the second side plate 150, the third side plate 160, and the fourth side plate are sequentially connected end to end and form an accommodating space with the panel 130; the high voltage ac module 200 and the low voltage dc module 300 are accommodated in the accommodating space.
Specifically, the power input end 400 is generally connected to the power converter through a power line and a power grid, the high-voltage ac module 200 includes a plurality of high-voltage ac units 210, and the high-voltage ac units 210 are configured to output high-voltage ac signals to electrical devices; the input end of the low-voltage direct current module 300 is connected with the output end of the high-voltage alternating current module 200, and the low-voltage direct current module 300 receives the high-voltage alternating current signal output by the high-voltage alternating current module 200, and outputs a low-voltage direct current signal to the electric equipment after internal processing.
One end of the power line can adopt a plug mode, when the power converter is needed to be used, the power converter is connected to a mains supply alternating current power grid through a corresponding socket, and when the power converter is not needed to be used, the power line can be conveniently and quickly pulled out of the socket. When the power converter is connected to the power grid, the high-voltage ac power in the commercial ac power grid is output through each high-voltage ac unit 210 in the high-voltage ac module 200, and is used by the electric equipment requiring the high-voltage ac power; the specific number of the high voltage ac units 210 may be set according to the requirement, and is not limited herein; the power converter transmits the output of the high-voltage ac module 200 to the low-voltage dc module 300, and the low-voltage dc module 300 performs internal processing to output a low-voltage dc signal to an electric device, such as directly charging a mobile terminal, such as a mobile phone or a tablet computer. Therefore, the high-voltage alternating current and the low-voltage direct current can be output simultaneously through the power converter without being externally connected with other power switching equipment; and the power converter with the integrated structure simplifies the line connection of power switching, is convenient for a user to carry and use, reduces the cost and can also avoid safety accidents caused by complex line connection.
Further, the power input terminal 400 includes a live wire, a zero line, and a ground wire; the high voltage output end comprises a plurality of high voltage output ports 110; the low voltage output includes a plurality of low voltage output ports 120; the power input terminals 400 are disposed on the first side plate 140, the high-voltage output ports 110 are arranged on the panel 130 in an array, and the low-voltage output ports 120 are arranged on the second side plate 150 in an array. The high-voltage alternating current module comprises a plurality of high-voltage alternating current units 210, and the high-voltage alternating current units 210 are sequentially electrically connected and correspond to the high-voltage output ports 110 one by one; the alternating current signals output by the power grid are output to each high-voltage alternating current unit 200 through the live wire, the zero wire and the ground wire, and then high-voltage alternating current signals are output to the electric equipment through the corresponding high-voltage output ports 110; the high-voltage ac signal output by any one of the high-voltage ac units 200 is transmitted to the low-voltage dc unit 300, and then the low-voltage dc signal is output to the electric device through the low-voltage output port 120.
Specifically, the high-voltage ac unit 210 includes a live wire terminal 211, a neutral wire terminal 212, and a ground wire terminal 213, wherein each of the live wire terminals 211 is sequentially connected, each of the neutral wire terminals 212 is sequentially connected, each of the ground wire terminals 213 is sequentially connected, the live wire terminals 211 respectively correspond to the live wire output ports of the high-voltage output ports 110, the neutral wire terminals 212 respectively correspond to the neutral wire output ports of the high-voltage output ports 110, and the ground wire terminals 213 respectively correspond to the ground wire output ports of the high-voltage output ports 110.
In this embodiment, the housing is preferably made of fire-rated engineering plastic, and the high-pressure outlet 110 is a medium-sized five-hole high-pressure outlet. Referring to fig. 3, fig. 3 is a schematic structural diagram of another embodiment of the high-pressure output port of the present invention, in this embodiment, the high-pressure output port 110 is a two-hole high-pressure output port of an euro standard; referring to fig. 4, fig. 4 is a schematic structural diagram of another embodiment of the high-pressure output port of the present invention, in this embodiment, the high-pressure output port 110 is a high-pressure output port with three holes in the american standard; referring to fig. 5, fig. 5 is a schematic structural diagram of another embodiment of the high-pressure output port of the present invention, in this embodiment, the high-pressure output port 110 is an english three-hole high-pressure output port. The high-voltage output port is a single independent module and can be replaced according to the requirement to adapt to the specifications of electric appliances in different countries.
Because each live wire terminal 211 is connected with the live wire of the power grid, each zero wire terminal 212 is connected with the zero wire of the power grid, and each ground wire terminal 213 is connected with the ground wire of the power grid, any live wire terminal 211 and any zero wire terminal 212 can be taken as the output of the high-voltage alternating current module 200, the output is transmitted to the low-voltage direct current module 300 and is taken as the input of the low-voltage direct current module 300, the rectification filtering unit 320, the transformation modulation unit 330 and the like are integrated in the low-voltage direct current module 300, and after the processing of the units, the low-voltage direct current signals are output to corresponding electric equipment through the low-voltage output port 120.
The low voltage outlet 120 is preferably a universal USB interface.
Generally, the high-voltage ac units 210 can be arranged in order to facilitate connection between terminals, so that the whole power converter has a compact structure.
The high voltage ac module 200 further includes a switch 230 and an anti-surge module 220. The switch 230 is connected in series between the live wire of the power line and the live wire input end of the anti-surge module, and is used for controlling the whole power converter to be turned on and off, when the switch 230 is turned on, the power converter can start to work as long as the power line of the power converter is connected with the power grid, when the switch 230 is turned on, the power converter is disconnected with the power grid, and whether the power converter works or not can be conveniently and quickly controlled through the switch 230.
In order to prevent the power converter from being burned out after a lightning strike or an inrush current flows into the power converter, an anti-surge module 220 is further added to the power converter. The live wire input end of the anti-surge module 220 is connected to the live wire of the power grid through the switch 230, and the zero wire input end is connected with the zero wire of the power line; the live wire output end of the high-voltage alternating current unit is connected with the live wire terminal 211 of any high-voltage alternating current unit 210, the zero wire output end of the high-voltage alternating current unit is connected with the zero wire terminal 212 of any high-voltage alternating current unit 210, and the ground wire end of the high-voltage alternating current unit is connected with the ground wire of the power wire and the ground wire terminal 213 connected to any high-voltage alternating current unit 210; after the ac power enters the power converter, if there is a lightning strike or a surge current, the surge protection module 220 can rapidly discharge the large current to the ground, so that the current output to each of the high voltage ac unit 210 and the low voltage dc module 300 is stable.
Further, referring to fig. 6 and 7, fig. 6 is a functional module structure schematic diagram of the low voltage dc module according to the present invention; fig. 7 is a circuit connection diagram of the low voltage dc module according to the present invention. In this embodiment, the low voltage dc module 300 includes an EMI unit 310, a rectifying and filtering unit 320, and a transforming and modulating unit 330, wherein an input end of the EMI unit 310 is connected to an output end of the high voltage ac module 200, an output end of the EMI unit 310 is connected to an input end of the rectifying and filtering unit 320, an output end of the rectifying and filtering unit 320 is connected to an input end of the transforming and modulating unit 330, and an output end of the transforming and modulating unit 330 corresponds to the low voltage output port 120; the high-voltage ac signal output by the high-voltage ac module 200 is subjected to common mode rejection processing by the EMI unit 310, and then transmitted to the rectifying and filtering unit 320 to be rectified and filtered to form a high-voltage dc signal, and then subjected to voltage transformation and PWM modulation by the voltage transformation modulation unit 330 to form a low-voltage dc signal, and then output to the electric equipment.
Specifically, the EMI unit 310 includes a first EMI filter LF1, a first capacitor CX1, and a second EMI filter LF2, a first input end of the first EMI filter LF1 is connected to any one of the live line terminals 211 as the live line input end 301 of the low-voltage dc module 300, a second input end of the first EMI filter LF1 is connected to any one of the neutral line terminals 212 as the neutral line input end 302 of the low-voltage dc module 300, the first capacitor CX1 is connected between the first output end and the second output end of the first EMI filter LF1, a first input end of the second EMI filter LF2 is connected to the first output end of the first EMI filter LF1, and a second input end of the second EMI filter LF2 is connected to the second output end of the first EMI filter LF 1.
After the high-voltage alternating current signal is transmitted to the EMI unit 310 and processed by the first EMI filter LF1 and the second EMI filter LF2, the interference of the common-mode signal of the high-voltage alternating current part can be filtered out, the interference to the electric equipment caused by entering the electric equipment is prevented, and the radiation to the human body can be reduced.
Specifically, the rectifying and smoothing unit 320 includes a rectifying bridge DB1 and a first smoothing capacitor C1, a first input terminal of the rectifying bridge DB1 is connected to a first input terminal of the second EMI filter LF2, and a second input terminal of the rectifying bridge DB1 is connected to a second input terminal of the second EMI filter LF 2; the positive pole of the first filter capacitor C1 is connected to the first output terminal of the rectifier bridge DB1, and the negative pole of the first filter capacitor C1 is connected to the second output terminal of the rectifier bridge DB 1.
The high-voltage ac signal with the common-mode signal filtered out is rectified into a high-voltage dc signal by the rectifier bridge DB1, and the high-order harmonics in the high-voltage dc signal are filtered out by the first filter capacitor C1, so that the obtained stable pulsating dc signal is output to the transformer modulation unit 330 for transformer modulation.
Specifically, the transformer modulation unit 330 includes a transformer unit T1, a PWM modulation unit U1, and a MOS transistor Q1, the transformer unit T1 includes a primary coil, an auxiliary coil, and a secondary coil, the primary coil and the auxiliary coil are located on the primary side of the transformer unit T1, and the secondary coil is located on the secondary side of the transformer unit T1; one end of the primary coil is connected with the positive electrode of the second filter capacitor, and the other end of the primary coil is connected with the drain electrode of the MOS transistor Q1; one end of the auxiliary coil is connected with the starting end of the PWM modulation unit U1, and the other end of the auxiliary coil is grounded; one end of the secondary coil is connected with the power end of each low-voltage output port 120, and the other end of the secondary coil is connected with the grounding end of each low-voltage output port 120 and then grounded; the starting end of the PWM modulation unit U1 is connected to the positive electrode of the second filter capacitor through a current-limiting resistor, and the output end of the PWM modulation unit U1 is connected with the gate of the MOS transistor Q1; the source of the MOS transistor Q1 is grounded.
When the direct current pulse signal flows in through the primary coil, the direct current pulse signal is further transmitted to the starting end of the PWM modulation unit U1 through the current-limiting resistors R3 and R4, at this time, the primary coil forms 1 positive and 3 negative electromotive forces, and then is coupled to the auxiliary coil and the secondary coil, so that the auxiliary coil forms 4 positive and 5 negative electromotive forces, the secondary coil forms A positive and B negative electromotive forces, the electromotive forces are also transmitted to the starting end of the PWM modulation unit U1 through the diode D3 and the capacitors C3 and C6, so that the PWM modulation unit U1 is rapidly started, since the output end of the PWM modulation unit U1 is connected to the gate of the MOS tube Q1, when the PWM modulation unit U1 is started, the output end outputs a PWM pulse signal, when the PWM pulse signal is high, the MOS tube Q1 is rapidly saturated and conducted, the primary coil forms a passage with the ground through the drain and the source of the MOS tube Q1, the A end of the secondary coil is connected with a group of diodes D4 connected in, D5 and D6, since the anodes of the diodes D4, D5 and D6 are connected with the terminal B, the group of diodes is cut off, and the secondary coil is in the energy storage state.
When the PWM pulse signal is at low level, the MOS transistor Q1 will gradually enter a cut-off state, at this time, because the current in the coil cannot suddenly change, the primary coil forms a positive electromotive force of 1 negative 3, which is coupled to the auxiliary coil and the secondary coil, the auxiliary coil forms a positive electromotive force of 4 negative 5, the secondary coil forms a positive electromotive force of a negative B, the back electromotive force of the auxiliary coil is applied to the start end of the PWM modulation unit U1 through the diode D3, the capacitors C3, and C6, so that the MOS transistor Q1 is rapidly cut off, and the secondary coil forms a low-voltage dc signal required by the electric equipment after releasing energy through the diodes D4, D5, and D6.
Since the output of the rectifying and filtering unit 320 is always connected to the start terminal of the PWM modulating unit U1, the PWM starts, and the MOS transistor Q1 is turned on.
Further, the low-voltage dc module 300 further includes a feedback unit 340, the feedback unit 340 includes a first voltage regulator tube U3 and an optocoupler U2, an anode of the first voltage regulator tube U3 is connected to a power supply terminal of each low-voltage output port 120, a cathode of the first voltage regulator tube U3 is connected to a light emitting diode of the optocoupler U2, one end of a phototransistor of the optocoupler U2 is connected to a feedback end of the PWM modulation unit U1, and the other end of the phototransistor of the optocoupler U2 is grounded.
Voltage and current signals of the low-voltage direct current module 300 are sampled to a feedback end of the PWM modulation unit U1 through the feedback unit 340, and when the voltage signal sampled by the feedback end of the PWM modulation unit U1 is overvoltage, overcurrent or short-circuited, the PWM modulation unit U1 starts an internal protection circuit, closes an output PWM pulse, stops working, and is beneficial to protecting the power converter and electric equipment.
Further, the low-voltage dc module 300 further includes an output voltage adjusting module 350, the output voltage adjusting module 350 includes a plurality of output voltage adjusting units U4/U5/U6/U7/U, power terminals of the output voltage adjusting units U4/U5/U6/U7/U are connected to the power terminal of the low-voltage output port 120, first detecting terminals of the output voltage adjusting units U4/U5/U6/U7/U8 are connected to the positive terminal of the charging terminal of the low-voltage output port 120, and first detecting terminals of the output voltage adjusting units U4/U5/U6/U7/U8 are connected to the negative terminal of the charging terminal of the low-voltage output port 120; the output voltage adjusting unit U4/U5/U6/U7/U8 correspondingly adjusts the output voltage to the low voltage output port 120 according to the current values detected by the first detection terminal and the second detection terminal.
Due to different electric devices, the charging modes are different, i.e. the charging currents are different, and generally have the following specifications: 5uA, 30uA and 150uA, so that different electric equipment can be distinguished according to the detected charging current value, and the output voltage is correspondingly adjusted according to the detected current value.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A power converter is characterized by comprising a high-voltage alternating current module, a low-voltage direct current module, a power input end, a high-voltage output end and a low-voltage output end, wherein the power converter is connected with a power grid through the power input end; wherein,
after the alternating current signal output by the power grid is processed by the high-voltage alternating current module, a high-voltage alternating current signal is formed and is respectively output to the high-voltage output end and the low-voltage direct current module; the low-voltage direct current module rectifies and transforms the received high-voltage alternating current signal to form a low-voltage direct current signal and outputs the low-voltage direct current signal to a low-voltage output end.
2. The power converter of claim 1 wherein said power input includes a live, neutral and ground; the high-voltage output end comprises a plurality of high-voltage output ports; the low-voltage output end comprises a plurality of low-voltage output ports; the high-voltage alternating current module comprises a plurality of high-voltage alternating current units which are sequentially and electrically connected and correspond to the high-voltage output ports one by one; the alternating current signals output by the power grid are output to each high-voltage alternating current unit through the live wire, the zero line and the ground wire, and then high-voltage alternating current signals are output to the electric equipment through the corresponding high-voltage output ports; and a high-voltage alternating current signal output by any one high-voltage alternating current unit is transmitted to the low-voltage direct current unit, and then a low-voltage direct current signal is output to the electric equipment through the low-voltage output port.
3. The power converter of claim 2, wherein said high voltage ac module further comprises a switch and an anti-surge module, said switch being connected in series between a line of said power input and a line of said anti-surge module; the zero line input end of the anti-surge module is connected with the zero line of the power input end, and the ground wire end of the anti-surge module is connected with the ground wire of the power input end; the high-voltage alternating current unit comprises a live wire terminal, a zero wire terminal and a ground wire terminal, the live wire terminal is connected with the live wire output end of the anti-surge module after being sequentially connected, the zero wire terminal is connected with the zero wire output end of the anti-surge module after being sequentially connected, and the ground wire terminal is connected with the ground wire of the power input end after being sequentially connected.
4. The power converter according to claim 2, wherein the low voltage dc module comprises an EMI unit, a rectifying and filtering unit, and a voltage transformation and modulation unit, an input terminal of the EMI unit is connected to an output terminal of the high voltage ac module, an output terminal of the EMI unit is connected to an input terminal of the rectifying and filtering unit, an output terminal of the rectifying and filtering unit is connected to an input terminal of the voltage transformation and modulation unit, and an output terminal of the voltage transformation and modulation unit corresponds to the low voltage output port; wherein,
and the high-voltage alternating current signal output by the high-voltage alternating current module is subjected to common mode rejection processing by the EMI unit, then is transmitted to the rectification filtering unit to be rectified and filtered to form a high-voltage direct current signal, and is subjected to voltage transformation and PWM (pulse width modulation) processing by the voltage transformation modulation unit to form a low-voltage direct current signal which is output to electric equipment.
5. The power converter of claim 4 wherein the EMI unit comprises a first EMI filter, a first capacitor, and a second EMI filter, wherein a first input of the first EMI filter is connected to any of the hot terminals as a hot input of the low voltage dc module, wherein a second input of the first EMI filter is connected to any of the neutral terminals as a neutral input of the low voltage dc module, wherein the first capacitor is connected between a first output and a second output of the first EMI filter, wherein a first input of the second EMI filter is connected to a first output of the first EMI filter, and wherein a second input of the second EMI filter is connected to a second output of the first EMI filter.
6. The power converter of claim 5, wherein the rectifying-filtering unit comprises a rectifying bridge and a first filtering capacitor, a first input terminal of the rectifying bridge is connected with a first input terminal of the second EMI filter, and a second input terminal of the rectifying bridge is connected with a second input terminal of the second EMI filter; the positive electrode of the first filter capacitor is connected with the first output end of the rectifier bridge, and the negative electrode of the first filter capacitor is connected with the second output end of the rectifier bridge.
7. The power converter according to claim 6, wherein the transformer modulation unit comprises a transformer unit, a PWM modulation unit, and a MOS transistor, the transformer unit comprises a primary coil, an auxiliary coil, and a secondary coil, the primary coil and the auxiliary coil are located on a primary side of the transformer unit, and the secondary coil is located on a secondary side of the transformer unit; one end of the primary coil is connected with the positive electrode of the second filter capacitor, and the other end of the primary coil is connected with the drain electrode of the MOS tube; one end of the auxiliary coil is connected with the starting end of the PWM modulation unit, and the other end of the auxiliary coil is grounded; one end of the secondary coil is connected with the power supply end of each low-voltage output port respectively, and the other end of the secondary coil is grounded after being connected with the grounding end of each low-voltage output port; the starting end of the PWM modulation unit is connected to the anode of the second filter capacitor through a current-limiting resistor, and the output end of the PWM modulation unit is connected with the grid electrode of the MOS tube; and the source electrode of the MOS tube is grounded.
8. The power converter according to claim 7, wherein the low voltage dc module further comprises a feedback unit, the feedback unit comprises a first voltage regulator tube and an optocoupler, an anode of the first voltage regulator tube is connected to a power supply terminal of each low voltage output port, a cathode of the first voltage regulator tube is connected to a light emitting diode of the optocoupler, one end of a phototransistor of the optocoupler is connected to the feedback terminal of the PWM modulating unit, and the other end of the phototransistor of the optocoupler is grounded.
9. The power converter according to claim 2, wherein the low-voltage dc module further comprises an output voltage adjusting module, the output voltage adjusting module comprises a plurality of output voltage adjusting units corresponding to the low-voltage output ports, a power supply terminal of the output voltage adjusting unit is connected to a power supply terminal of the low-voltage output port, a first detection terminal of the output voltage adjusting unit is connected to a positive terminal of the charging terminal of the low-voltage output port, and a first detection terminal of the output voltage adjusting unit is connected to a negative terminal of the charging terminal of the low-voltage output port; the output voltage adjusting unit correspondingly adjusts the output voltage to the low-voltage output port according to the current values detected by the first detection end and the second detection end.
10. The power converter according to claim 2, wherein the power converter comprises a housing, the housing comprises a front shell and a bottom shell, the front shell is detachably connected with the bottom shell, the bottom shell has a rectangular plate shape, the front shell comprises a panel, and a first side plate, a second side plate, a third side plate and a fourth side plate which are perpendicularly connected with the panel, the first side plate and the second side plate are arranged oppositely, the third side plate and the fourth side plate are arranged oppositely, the first side plate, the second side plate, the third side plate and the fourth side plate are sequentially connected end to end and form an accommodating space with the panel; the high-voltage alternating current module and the low-voltage direct current module are contained in the containing space, the power input end is arranged on the first side plate, the high-voltage output port array is arranged on the panel, and the low-voltage output port array is arranged on the second side plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510018712.0A CN104506025A (en) | 2015-01-14 | 2015-01-14 | Power converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510018712.0A CN104506025A (en) | 2015-01-14 | 2015-01-14 | Power converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104506025A true CN104506025A (en) | 2015-04-08 |
Family
ID=52947753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510018712.0A Pending CN104506025A (en) | 2015-01-14 | 2015-01-14 | Power converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104506025A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017032341A1 (en) * | 2015-08-27 | 2017-03-02 | 深圳市元创时代科技有限公司 | Power supply apparatus with relay function |
| CN110601327A (en) * | 2019-10-14 | 2019-12-20 | 美平电器制品（深圳）有限公司 | A hybrid hairdresser |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2567852Y (en) * | 2002-08-16 | 2003-08-20 | 邯郸市兴周电子研究所 | AC-DC double-output power special UPS |
| CN201374837Y (en) * | 2009-03-13 | 2009-12-30 | 重庆乔亚电子有限公司 | High efficiency LED constant-current drive power source |
| CN102026448A (en) * | 2010-11-01 | 2011-04-20 | 王子能 | LED power circuit |
| CN202085360U (en) * | 2011-05-26 | 2011-12-21 | 张彬 | LED constant current driving power source capable of automatically steplessly adjusting in multi-period |
| CN103312134A (en) * | 2012-03-06 | 2013-09-18 | 黎强 | Power distribution system |
| CN103378715A (en) * | 2012-04-13 | 2013-10-30 | 胜德国际研发股份有限公司 | Power supply extension line |
| CN103762866A (en) * | 2014-01-25 | 2014-04-30 | 济南诺辉节能技术开发有限公司 | Indoor energy efficiency management terminal power source module |
| CN204517645U (en) * | 2015-01-14 | 2015-07-29 | 深圳市元创时代科技有限公司 | Power supply changeover device |
-
2015
- 2015-01-14 CN CN201510018712.0A patent/CN104506025A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2567852Y (en) * | 2002-08-16 | 2003-08-20 | 邯郸市兴周电子研究所 | AC-DC double-output power special UPS |
| CN201374837Y (en) * | 2009-03-13 | 2009-12-30 | 重庆乔亚电子有限公司 | High efficiency LED constant-current drive power source |
| CN102026448A (en) * | 2010-11-01 | 2011-04-20 | 王子能 | LED power circuit |
| CN202085360U (en) * | 2011-05-26 | 2011-12-21 | 张彬 | LED constant current driving power source capable of automatically steplessly adjusting in multi-period |
| CN103312134A (en) * | 2012-03-06 | 2013-09-18 | 黎强 | Power distribution system |
| CN103378715A (en) * | 2012-04-13 | 2013-10-30 | 胜德国际研发股份有限公司 | Power supply extension line |
| CN103762866A (en) * | 2014-01-25 | 2014-04-30 | 济南诺辉节能技术开发有限公司 | Indoor energy efficiency management terminal power source module |
| CN204517645U (en) * | 2015-01-14 | 2015-07-29 | 深圳市元创时代科技有限公司 | Power supply changeover device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017032341A1 (en) * | 2015-08-27 | 2017-03-02 | 深圳市元创时代科技有限公司 | Power supply apparatus with relay function |
| CN110601327A (en) * | 2019-10-14 | 2019-12-20 | 美平电器制品（深圳）有限公司 | A hybrid hairdresser |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204858705U (en) | mobile phone charger | |
| GB2463339A (en) | DC-DC converter having protection for electrical appliance | |
| CN111193317A (en) | A terminal equipment power failure protection circuit | |
| CN104506025A (en) | Power converter | |
| CN208316270U (en) | Voltage protection circuit and power supply change-over device | |
| CN115021382A (en) | USB power management system and charging cabinet | |
| CN214412257U (en) | Electric leakage protection device and electric appliance | |
| CN204517645U (en) | Power supply changeover device | |
| CN221010003U (en) | AC/DC power supply circuit and AC/DC power supply equipment | |
| CN209488241U (en) | Small-sized quick charger | |
| CN202696482U (en) | Power supply circuit for leakage circuit breaker | |
| CN102638093A (en) | Power off protection device | |
| CN106329231B (en) | Embedded socket | |
| CN209930022U (en) | Novel many mouthfuls of independent current-limiting intelligent recognition chargers | |
| CN213398876U (en) | Grounding detection circuit and electrical appliance | |
| CN204741137U (en) | USB wall charging socket | |
| CN103516057A (en) | A power supply system base on electricity switching-on of a current transformer | |
| CN210273531U (en) | Charging circuit, charging equipment and terminal | |
| CN202737761U (en) | Switching power supply circuit for pool | |
| CN209593286U (en) | A kind of DC power supply pinboard with adjustable buck functionality | |
| CN109256967B (en) | Constant voltage power supply circuit for stable power output during starting | |
| CN214479700U (en) | Switching circuit and charger | |
| CN209375464U (en) | Inverse-excitation type switch power-supply adapter | |
| CN218997281U (en) | A plug-in board with protection function | |
| CN218997951U (en) | A plug-in board with an air switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150408 |
|
| RJ01 | Rejection of invention patent application after publication |