TWI398086B - Power device and voltage transform device - Google Patents

Description

Power supply unit and transformer unit

The present invention relates to the field of electronic technologies, and in particular, to a power supply device and a transformer device.

The power supply unit is used to supply an operating voltage or current to an electronic device or an electronic chip. The rated operating voltages of different electronic devices or electronic wafers are usually different, so the voltage required for each electronic device or electronic chip needs to be obtained by voltage conversion.

The power supply unit uses a transformer to achieve voltage conversion. In order to meet the requirements of electronic equipment with different rated working voltages at the same time, the transformer generally sets multiple outputs with different voltages. At present, in the multi-output circuit of the transformer, the center tap is grounded, and according to the magnitude of the voltage to be output, the output end is respectively led out at the symmetrical position centered on the center tap on the secondary coil, and the two output ends respectively are taken out. After the diodes are merged into one output. If the circuit requires other voltages, you can continue to increase the output according to the above method.

However, in the above-mentioned power supply device with multiple outputs, the center tap of the transformer is grounded, and each output needs to be connected to two positions in the secondary coil of the transformer, and is respectively connected to the output by the diode. Thus, when there are multiple outputs, it is necessary to provide a plurality of terminals on the secondary coil, which is disadvantageous for the integration of components, and the increase of the output terminals also increases the electromagnetic interference between the outputs. In addition, adding one more output also requires increasing the number of windings of the secondary coil.

In view of the above, it is necessary to provide a power supply device that reduces the number of windings of the secondary winding of the transformer unit.

In addition, it is also necessary to provide a transformer device that reduces the number of windings of the secondary coil.

A power supply device includes a power module, a conversion module, and an output module, wherein the power module is configured to provide an AC voltage to the conversion module, and the conversion module is configured to convert the AC voltage and output the first signal and the second signal. Signal to the output module. The conversion module includes a first input end and a second input end on the primary coil side, and a first output end, a second output end, and a third output end on the secondary coil side, where the first input end and the second input end are common The first output end and the second output end are used to output the first signal, the third output end is used to output the second signal, and the third output end is located at the first output end and the second output end. between.

A transformer device includes a first input end and a second input end on the primary coil side and a first output end, a second output end, and a third output end on the secondary coil side, the first input end and the second input end being common The first output end and the second output end are used to output the first signal, the third output end is used to output the second signal, and the third output end is located at the first output end and the second output end. between.

By using the third output terminal for outputting the second signal, the power supply device and the voltage transformation device increase the output of the transformer without increasing the output 埠 of the transformer device, thereby reducing the electromagnetic force caused by the output 埠Interference; further, the number of coils of the secondary coil required for the transformer device to obtain the same output voltage as the conventional one is reduced by half, thereby contributing to the reduction of the loss. Consumption.

As shown in FIG. 1 , a power supply device 100 of a preferred embodiment includes a power module 10 , a conversion module 20 , and an output module 30 . The power module 10 is configured to provide an AC voltage to the conversion module 20, and the conversion module 20 is configured to convert the AC voltage to output the first signal and the second signal to the output module 30.

As shown in FIG. 2 , which is a circuit configuration diagram of the power supply device 100 , the power module 10 includes a DC power source 101 , a control unit 103 , a first port 104 , a second port 105 , a first switching element Q1 , and a second switching element Q2 . And a first capacitor C1. The DC power source 101 is for supplying an operating voltage to the control unit 103 and supplying a DC voltage to the first switching element Q1. The control unit 103 is for providing switching signals to the first switching element Q1 and the second switching element Q2 at intervals. The first switching element Q1 includes a first terminal Q11 connected to the control unit 103, a second terminal Q12 connected to the DC power source 101, and a third terminal Q13 connected to the first port 104. One end of the first capacitor C1 is connected to the second crucible 105, and the other end is grounded. The second switching element Q2 includes a fourth terminal Q21 connected to the control unit 103, a fifth terminal Q22 connected to the first port 104, and a sixth terminal Q23 for grounding.

The conversion module 20 is a transformer device T, which includes a first input terminal T1, a second input terminal T2, a first output terminal T3, a second output terminal T4, and a third output terminal T5. The first input terminal T1 and the second input terminal T2 are located on the primary coil side of the transformer device T, and the first output terminal T3, the second output terminal T4, and the third output terminal T5 are located on the secondary coil side of the transformer device T, And the third output terminal T5 is the center tap of the secondary coil. The first input terminal T1 and the power module 10 The first input terminal T2 is connected to the second port 105 of the power module 10. The first output terminal T3 and the second output terminal T4 are used together to output a first signal, and the third output terminal T5 is used to output a second signal.

The output module 30 includes a first output unit 30a and a second output unit 30b. The first output unit 30a and the second output unit 30b are respectively configured to receive the first signal and the second signal, and output the first DC signal and the second DC signal, respectively.

The first output unit 30a includes a rectifier bridge D, a second capacitor C2, a first inductor L1, and a first DC output terminal O1. The rectifier bridge includes a first rectifying terminal D1 connected to the first output terminal T3, a second rectifying terminal D2 connected to the second output terminal T4, a third rectifying terminal D3 connected to the ground, and a fourth rectifying terminal D4. One end of the second capacitor C2 is connected to the fourth rectifying terminal D4, and the other end is grounded. One end of the first inductor L1 is connected to the fourth rectifying terminal D4, and the other end is connected to the first DC output terminal O1.

The second output unit 30b includes a third capacitor C3, a second inductor L2, and a second DC output terminal O2. One end of the third capacitor C3 is connected to the third output terminal T5 of the conversion module 20, and the other end is grounded. One end of the second inductor L2 is connected to the third output terminal T5, and the other end is connected to the second DC output terminal O2.

When the power supply device 100 is in operation, the control unit 103 outputs a switching signal to the first terminal Q11 of the first switching element Q1 to turn on the first switching element Q1, and the DC voltage provided by the DC power supply 101 is input through the first input of the transformer device T. The terminal T1 and the second input terminal T2 are transmitted to the first capacitor C1, and the first capacitor C1 is started to be charged. At the same time, an induced magnetic field is generated in the primary coil of the transformer device T, and an induced current is generated in the secondary coil. Transformer device T by The first output terminal T3 and the second output terminal T4 output a first signal to the first output unit 30a, and output a second signal to the second output unit 30b through the third output terminal T5 and the second output terminal T4. After the first output unit 30a rectifies the first signal, the first DC signal is outputted by the first DC output terminal O1. The second output unit 30b filters the second signal after being rectified by the rectifier bridge D, and outputs a second DC signal through the second DC output terminal O2.

When the charging of the first capacitor C1 is completed, the control unit 103 stops outputting the switching signal to the first terminal Q11 of the first switching element Q1 while outputting the switching signal to the fourth terminal Q21 of the second switching element Q2. The second switching element Q2 is turned on. Since the sixth terminal Q23 of the second switching element Q2 is grounded, the first capacitor C1 is discharged by the second switching element Q2, and an induced magnetic field is generated in the primary coil of the transformer device T. In turn, an induced current is generated in the secondary coil. At the same time, the voltage converting device T outputs the first signal to the first output unit 30a through the first output terminal T3 and the second output terminal T4, and outputs the second signal to the second output unit 30b through the third output terminal T5.

By using the third output terminal T5 of the transformer device T for outputting the second signal, the power supply device 100 increases the output of the transformer device T without increasing the output of the transformer device T, thereby reducing the output due to the output. Electromagnetic interference caused; further, the number of coils of the secondary coil required for the transformer device T to obtain an output voltage of the same size as in the prior art is reduced by half, thereby contributing to reduction of loss.

100‧‧‧Power supply unit

10‧‧‧Power Module

101‧‧‧DC power supply

103‧‧‧Control unit

104‧‧‧ first

105‧‧‧Second

20‧‧‧Transition module

30‧‧‧Output module

30a‧‧‧first output unit

30b‧‧‧second output unit

1 is a functional block diagram of a power supply device according to a preferred embodiment.

2 is a circuit configuration diagram of a power supply device according to a preferred embodiment.

100‧‧‧Power supply unit

10‧‧‧Power Module

20‧‧‧Transition module

30‧‧‧Output module

Claims (5)

A power supply device includes a power module, a conversion module, and an output module, wherein the power module is configured to provide an AC voltage to the conversion module, and the conversion module is configured to convert the AC voltage to output the first signal and the second Signaling to the output module, the improvement is that the conversion module includes a first input end and a second input end on the primary coil side, and a first output end, a second output end, and a third output end on the secondary coil side, The first input end and the second input end are used to receive the AC voltage. The first output end and the second output end are used together to output the first signal, and the third output end and the second output end are used together to output the second signal. And the third output end is located between the first output end and the second output end; the output module includes a first output unit and a second output unit, the first output unit includes a rectifier bridge, a second capacitor, and a first inductor And a first DC output end, the rectifier bridge includes a first rectifying end, a second rectifying end, a third rectifying end, and a fourth rectifying end, wherein the first rectifying end is connected to the first output end of the conversion module, the first Two rectifier The second output end is connected, the third rectifying end is grounded, the fourth rectifying end is connected to one end of the second capacitor, the other end of the second capacitor is grounded, one end of the inductor is connected to the fourth rectifying end, and the other end is connected Connected to the first DC output terminal; after the first output unit rectifies and filters the first signal, the first DC output terminal outputs a first DC signal; the second output unit includes a second DC output terminal, The second output unit is connected to the third output end; the second output unit filters the second signal after being rectified by the rectifier bridge, and outputs the second DC signal through the second DC output terminal. The power supply device of claim 1, wherein the power module comprises a first port and a second port, the first port being connected to the first input end of the conversion module, the second port and the conversion mode The second input of the group is connected. The power supply device of claim 2, further comprising a DC power supply, a control unit, a first switching element, a second switching element, and a first capacitor, wherein the DC power supply is used to provide work to the control unit a voltage, the control unit is configured to output a switching signal to the first switching element and the second switching element at intervals, the DC power source is further configured to charge the first capacitor by the first switching element, and the first capacitor further Discharge is performed by the second switching element. The power supply device of claim 1, wherein the second output unit comprises a third capacitor and a second inductor, one end of the third capacitor is connected to the third output end of the conversion module, and the other end is grounded. One end of the second inductor is connected to the third output end, and the other end is connected to the second DC output end. The power supply device of claim 1, wherein the conversion module is a transformer, and the third output end is a center tap on a secondary circuit side of the transformer, and the voltage of the first signal is twice the second signal.