TWI572131B - Power converter - Google Patents

Description

Power converter

The present invention provides a power generation converter, in particular, an input voltage, a first voltage dividing capacitor, a second voltage dividing capacitor, an interleaved driving circuit, a resonant tank, a voltage doubler rectifier, a filter capacitor, and a load are electrically connected. Thus, the interleaved driving circuit can ensure normal driving, and the resonant slot can reduce the interleaved driving circuit in the state of zero voltage or zero current of the first power switch and the second power switch of the interleaved driving circuit. The switching loss of the first power switch and the second power switch is to improve the operational efficiency of the regenerative power generation conversion.

According to the current, oil plays an indispensable role in the energy industry. With the widespread use of oil, the energy crisis has become hot, and people have to pay attention to the eager energy crisis. Moreover, the most commonly used power source for human beings. Most of them are secondary energy sources converted from fossil fuels. Therefore, carbon dioxide emissions from greenhouse gases accompany the power generation process, causing global climate anomalies. To solve climate change, in December 1997 in Kyoto, Kyoto, Japan. The National Kyoto International Hall held the third meeting of the United Nations Framework Convention on Climate Change, which aims to stabilize the greenhouse gas content in the atmosphere at an appropriate level to ensure the smooth adaptation of the ecosystem, the safe production of food and the economic Continue to develop to regulate 38 countries and the EU, to control the amount of anthropogenic greenhouse gases in an individual or joint way, and to reduce the impact of the greenhouse effect on the global climate; to solve this problem, we will study how to improve the conversion of renewable energy. Technology to increase the use of energy in the field of power electronics However, most of the converters currently used in electronic products on the market are hard-switching. When the power switch operates at high-frequency switching, the switching loss of the power switch and the efficiency of the product are low. Therefore, the present invention The present invention has been invented for the first time in view of the fact that there is a deficiency as described above, and it has been painstakingly studied and improved.

The main object of the present invention is that the interleaved driving circuit can ensure normal driving, and the resonant slot can reduce the first power switch and the second power switch of the interleaved driving circuit in a state of zero voltage or zero current. The switching of the first power switch and the second power switch of the interleaved driving circuit to improve the efficiency of the regenerative power generation conversion operation.

The main feature of the present invention is that the input voltage, the first voltage dividing capacitor, the second voltage dividing capacitor, the interleaved driving circuit, the resonant tank, the voltage doubler rectifier, the filter capacitor and the load are electrically connected, and the input is One end of the voltage is connected to one end of the first voltage dividing capacitor and the first power switch of the interleaved driving circuit, and the other end of the first voltage dividing capacitor is connected to one end of the second voltage dividing capacitor, One end of the first resonant inductor of the resonant tank, one end of the third capacitor of the voltage doubler rectifier, and one end of the fourth capacitor of the voltage doubler rectifier, and the other end of the second voltage dividing capacitor is connected to the input voltage One end and a source of the second power switch of the interleaved driving circuit, a source of the first power switch of the interleaved driving circuit is connected to a drain of the second power switch of the interleaved driving circuit and the resonant tank One end of the resonant capacitor, the other end of the resonant capacitor of the resonant tank is connected to one end of the second resonant inductor of the resonant slot, and the other end of the second resonant inductor of the resonant slot is connected to the resonant slot The other end of the resonant inductor, one end of the first diode of the voltage doubler rectifier, and one end of the second diode of the voltage doubler rectifier, the other end of the first diode of the voltage doubler rectifier is connected to the multiple The other end of the third capacitor of the voltage rectifier, one end of the filter capacitor and one end of the load, the other end of the second diode of the voltage doubler rectifier is connected to the other end of the fourth capacitor of the voltage doubler rectifier, The other end of the filter capacitor and the other end of the load.

In the power converter of the present invention, the input voltage is 150V, the output voltage is 143V, the output power is 169W, the switching frequency is 115kHz, and the overall operating efficiency is 98.85%.

1‧‧‧Interleaved drive circuit

2‧‧‧Resonance slot

3‧‧‧ double voltage rectifier

V _s ‧‧‧ input voltage

i _s ‧‧‧Input current

C ₁ ‧‧‧First voltage divider capacitor

V _c1 ‧‧‧First voltage divider capacitor voltage

i _c1 ‧‧‧First voltage divider capacitor current

C ₂ ‧‧‧Second voltage divider capacitor

V _c2 ‧‧‧Second voltage divider capacitor voltage

i _c2 ‧‧‧Second voltage divider current

V _{gs1 ‧‧‧first} drive voltage

V _{gs2 ‧‧‧second} drive voltage

S ₁ ‧‧‧first power switch

D ₁ ‧‧‧First Switching Diode

V _ds1 ‧‧‧first power switch voltage

i _s1 ‧‧‧first power switch current

Second power switch S ₂ ‧‧‧

D ₂ ‧‧‧Second switch diode

V _ds2 ‧‧‧second power switch voltage

i _s2 ‧‧‧second power switch current

C _s ‧‧‧Resonance Capacitor

V _cs ‧‧‧resonant capacitor voltage

i _cs ‧‧‧resonant capacitor current

L _p ‧‧‧First Resonance Inductance

V _Lp ‧‧‧First Resonant Inductor Voltage

i _Lp ‧‧‧First Resonant Inductor Current

L _s ‧‧‧second resonance inductor

V _Ls ‧‧‧Second resonant inductor voltage

i _Ls ‧‧‧Second resonant inductor current

V _a ‧‧‧Resonant input voltage

V _b ‧‧‧Resonance output voltage

i _b ‧‧‧Resonance output current

DR1 ‧‧‧First Diode

V _DR1 ‧‧‧first diode voltage

i _DR1 ‧‧‧first diode current

DR2 ‧‧‧Secondary

V _DR2 ‧‧‧Second diode voltage

i _DR2 ‧‧‧Second diode current

C ₃ ‧‧‧third capacitor

V _c3 ‧‧‧ third capacitor voltage

i _c3 ‧‧‧third capacitor current

C ₄ ‧‧‧fourth capacitor

V _c4 ‧‧‧fourth capacitor voltage

i _c4 ‧‧‧fourth capacitor current

C _o ‧‧‧Filter Capacitor

V _co ‧‧‧Filter capacitor voltage

i _co ‧‧‧Filter capacitor current

R ‧‧‧load

V _o ‧‧‧output voltage

I _o ‧‧‧Output current

The first figure is a circuit diagram of an embodiment of the present invention.

The second figure is a waveform diagram of the working mode of the embodiment of the present invention.

The third figure is a circuit diagram of the working mode 1 of the embodiment of the present invention.

The fourth figure is a circuit diagram of the second working mode of the embodiment of the present invention.

The fifth figure is a circuit diagram of the working mode 3 of the embodiment of the present invention.

The sixth figure is a circuit diagram of the working mode 4 of the embodiment of the present invention.

The seventh figure is a circuit diagram of the working mode 5 of the embodiment of the present invention.

The eighth figure is a circuit diagram of the working mode 6 of the embodiment of the present invention.

Ninth embodiment FIG first drive waveform diagram showing the voltage V _gs1 voltage power switch with a first embodiment of the line V _ds1 present invention is shown.

The tenth figure is a waveform diagram of the first power switch voltage V _ds1 and the first power switch current i _{s1 according to} the embodiment of the present invention.

An eleventh embodiment of the second driving waveform diagram of the second power voltage V _gs2 switching voltage V _ds2 embodiment of the present invention is shown based.

FIG. 12 is a waveform diagram of the second power switch voltage V _ds2 and the second power switch current i _{s2 according to an} embodiment of the present invention.

Figure 13 is _a waveform diagram showing the resonant input voltage V _a and the resonant capacitor current i _{cs in} the embodiment of the present invention.

Figure 14 is a waveform diagram showing the resonant capacitor voltage V _cs and the resonant capacitor current i _{cs in} the embodiment of the present invention.

The fifteenth figure is a waveform diagram of the first resonant inductor voltage V _Lp and the first resonant inductor current i _{Lp according to} the embodiment of the present invention.

Figure 16 is _a waveform diagram showing the resonant input voltage V _a and the resonant output voltage V _{b in} the embodiment of the present invention.

Figure 17 is a waveform diagram showing the resonant output voltage V _b and the resonant output current i _{b in} the embodiment of the present invention.

Figure 18 is a waveform diagram showing an output voltage V _o and an output current I _{o according to an} embodiment of the present invention.

Fig. 19 is a graph showing the efficiency of the embodiment of the present invention.

For the purpose of the present invention, the preferred embodiments of the present invention are described in the accompanying drawings, and are described in detail below. For the embodiments of the present invention, please refer to the first The figure shows mainly the input voltage V _s , the first voltage dividing capacitor C ₁ , the second voltage dividing capacitor C ₂ , the interleaved driving circuit 1, the resonant tank 2, the voltage doubler rectifier 3, the filter capacitor C _o and the load. R is electrically connected to each other, the end of the input voltage V _s of the lines connected to the first end of the dividing capacitor C ₁ and the interlaced driving circuit of a first power switch S ₁ of the drain 1, the first sub- The other end of the piezoelectric capacitor C ₁ is connected to one end of the second voltage dividing capacitor C ₂ , one end of the first resonant inductor L _p of the resonant tank 2 , one end of the third capacitor C ₃ of the voltage doubler rectifier 3 and the end One end of the fourth capacitor C ₄ of the voltage doubler rectifier 3, the other end of the second voltage dividing capacitor C ₂ is connected to the other end of the input voltage V _s and the second power switch S ₂ of the interleaved driving circuit 1 a source, the source of the first power switch S ₁ of the interleaved driving circuit 1 is connected to the interleaved driving power One end of the second power switch S ₂ of the circuit 1 and one end of the resonant capacitor C _s of the resonant tank 2, and the other end of the resonant capacitor C _s of the resonant tank 2 is connected to the second resonant inductor L of the resonant tank 2 _s end, the other end tied to the second resonant slot 2 of the resonant inductor L _s of the resonant tank is connected to the other end of the L _p 2 of the first resonant inductor, one end of the first two of the three diode voltage doubler rectifier DR1 3 and the end of the second diode of the voltage doubler rectifier DR2, the other end of the first two lines of the diode DR1 3 of the voltage doubler rectifier connected to the voltage doubler rectifier 3 of the third capacitor C ₃ and the other end of the One end of the filter capacitor C _o and one end of the load R , the other end of the second diode DR2 of the voltage doubler rectifier 3 is connected to the other end of the fourth capacitor C ₄ of the voltage doubler rectifier 3, the filter capacitor C The other end of _{o and} the other end of the load R.

When in use, please refer to the first figure, input a stable DC voltage source at the input voltage V _s , divide and filter, or filter, via the first voltage dividing capacitor C ₁ or the second voltage dividing capacitor C ₂ . Supplying the divided and filtered DC voltage to the first power switch S ₁ or the second power switch S ₂ of the interleaved driving circuit 1 , and the first power switch S ₁ or the second power switch of the interleaved driving circuit 1 S ₂ controls the mode of switching while ensuring normal driving, and inputs a square wave in the form of high frequency alternating current to the resonant tank 2, and the first power switch S ₁ or the second power switch S ₂ selects a MOSFET transistor switch, The first switching diode D ₁ and the second switching diode D ₂ in the parasitic reverse direction can be used to cooperate with the operation mode, and the resonant tank 2 is a resonant capacitor C _s , a first resonant inductor L _p and a second series-parallel resonant circuit resonant inductor L _s are electrically connected to each other, the form of communication of the resonant tank 2 through the output square wave voltage doubler rectifier into a DC power source 3, first make the interlaced driving circuits 1 a power switches S _1, S ₂ of the second power switch at zero voltage or State currents, reducing the interlaced driving circuit 1 of the first power switch S _1, the second high-frequency power switch S ₂ of the switching loss, and the filter capacitor C _o after the high-frequency noise filter can be obtained more The stable DC output voltage V _o and the output current I _{o are} given to the load R to improve the operational efficiency of the regenerative power generation conversion.

The waveform diagram of the working mode of the present invention, as shown in the second figure, has the following working modes:

First, the working mode 1 ( t _o <t<t ₁ ), please refer to the third figure, at t _o , the first resonant inductor current i _{Lp of} the resonant tank 2 continues to decrease, the first of the resonant tank 2 a resonant inductor current i _Lp flows through the first switching diode D _{1 of} the interleaved driving circuit ₁ , and the resonant input voltage At t ₁ , the first power switch S ₁ of the interleaved driving circuit 1 is in an on state, at which time the first resonant inductor current i _Lp of the resonant tank 2 drops to a lowest point, and the resonant capacitor current of the resonant tank 2 i _cs rises from a negative value to zero and enters mode two.

Second, the working mode 2 ( t ₁ <t<t ₂ ), please refer to the fourth figure, at t ₁ , the first power switch S ₁ of the interleaved driving circuit ₁ is in an on state, the resonant tank 2 The first resonant inductor current i _Lp starts to rise, but is still at a negative value, and the resonant capacitor current i _{cs of} the resonant tank 2 continues to rise; at t ₂ , the first resonant inductor current i _{Lp of} the resonant tank 2 rises to At zero value, the resonant capacitor current i _{cs of} the resonant tank 2 rises to the highest point and enters the operational mode three.

Third, the working mode three ( t ₂ <t < t ₃ ), please refer to the fifth figure, at t ₂ , the first power switch S _{1 of} the interleaved driving circuit ₁ is forced to cut off, the resonant tank 2 The first resonant inductor current i _Lp continues to rise, and the resonant capacitor current i _{cs of} the resonant tank 2 begins to decrease. At t ₃ , the resonant capacitor current i _{cs of} the resonant tank 2 continues to decrease, and enters the operational mode four.

4. Working mode 4 ( t ₃ <t<t ₄ ), please refer to the sixth figure, at t ₃ , the first resonant inductor current i _{Lp of} the resonant tank 2 flows through the interleaved driving circuit 1 First switching diode D ₂ , resonant input voltage at this time The first resonant inductor current i _{Lp of} the resonant tank 2 continues to rise, and the resonant capacitor current i _{cs of} the resonant tank 2 continues to decrease; at t ₄ , the second power switch S _{2 of} the interleaved driving circuit 1 In the on state, the resonant capacitor current i _{cs of} the resonant tank 2 drops to zero, and the first resonant inductor current i _{Lp of} the resonant tank 2 rises to the highest point and enters the operational mode five.

5. Working mode 5 ( t ₄ <t<t ₅ ), please refer to the seventh figure. At t ₄ , the second power switch S ₂ of the interleaved driving circuit 1 is in an on state, and the resonant tank 2 The resonant capacitor current i _cs drops to a negative value, and the first resonant inductor current i _{Lp of} the resonant tank 2 begins to decrease; at t ₅ , the first resonant inductor current i _{Lp of} the resonant tank 2 continues to decrease and enters the operation. Mode six.

6. Working mode 6 ( t ₅ <t<t ₆ ), please refer to the eighth figure, at t ₅ , the second power switch S _{2 of} the interleaved driving circuit 1 is forcibly cut off, the resonant tank 2 The first resonant inductor current i _Lp decreases to a value of zero, and the resonant capacitor current i _{cs of} the resonant tank 2 begins to rise; at t ₆ , the first resonant inductor current i _{Lp of} the resonant tank 2 flows to the interleaved driving circuit 1 The first switching diode D ₁ , the first resonant inductor current i _{Lp of} the resonant tank 2 drops to a minimum value, and the resonant capacitor current i _{cs of} the resonant tank 2 rises to zero value, and the circuit action returns to work. Mode one.

A first driving voltage waveform diagram V _gs1 the first power switch voltage V _ds1 of the present invention, as shown in FIG. IX, wherein CH1: 10V / div; CH3: 100V / div; Time: 2.5μs / div.

The waveform diagram of the first power switch voltage V _ds1 and the first power switch current i _s1 of the present invention is as shown in the tenth figure, wherein CH3: 100V/div; CH4: 1A/div; Time: 2.5μs/div.

Second driving voltage V _gs2 of the present invention is a waveform diagram of the second power voltage V _ds2 of the switch, as shown in FIG. XI, wherein CH2: 100V / div; CH3: 10V / div; Time: 2.5μs / div.

A waveform diagram of the second power switch voltage V _ds2 and the second power switch current i _s2 of the present invention, as shown in FIG. 12, wherein CH3: 100 V/div; CH4: 1 A/div; Time: 2.5 μs/div.

The waveform diagram of the resonant input voltage V _a and the resonant capacitor current i _cs of the present invention is as shown in the thirteenth diagram, wherein CH3: 100 V/div; CH4: 5 A/div; Time: 2.5 μs/div.

A waveform diagram of the resonant capacitor voltage V _cs and the resonant capacitor current i _cs of the present invention is as shown in FIG. 14 , wherein CH 3 : 20 V /div; CH 4 : 5 A/div; Time: 2.5 μs/div.

A waveform diagram of the first resonant inductor voltage V _Lp and the first resonant inductor current i _Lp of the present invention is as shown in FIG. 15 , wherein CH 3 : 100 V/div; CH 4 : 200 mA/div; Time: 2.5 μs/div.

A waveform diagram of the resonant input voltage V _a and the resonant output voltage V _b of the present invention is as shown in FIG. 16 , wherein CH 2 : 100 V/div; CH 3 : 100 V/div; Time: 2.5 μs/div.

A waveform diagram of the resonant output voltage V _b and the resonant output current i _b of the present invention, as shown in FIG. 17, wherein CH3: 100 V/div; CH4: 5 A/div; Time: 2.5 μs/div.

The waveform diagram of the output voltage V _o and the output current I _o of the present invention is as shown in FIG. 18, wherein CH3: 10 V/div; CH4: 500 mA/div; Time: 2.5 μs/div.

The present invention is based on the selection of appropriate parameters, as follows: Therefore, when the input voltage V _s is 150V, the output voltage V _O is 143V, the output power is 169W, the switching frequency ( f _S ) is 115kHz, and the overall operating efficiency (η) reaches 98.85%. As shown in the nineteenth figure, it is the efficiency graph of the present invention, the efficiency (η) is more than 85%, and the highest efficiency (η) is as high as 98.85%; thus, the interleaved driving circuit 1 can ensure normal driving, The resonant tank 2 can reduce the first power switch S ₁ and the second power switch S ₂ of the interleaved driving circuit 1 in a state of zero voltage or zero current, and reduce the first power switch S _{1 of} the interleaved driving circuit ₁ The switching loss of the second power switch S ₂ is to improve the operational efficiency of the regenerative power generation conversion.

In view of the above, the present invention has achieved the intended use and efficacy, and is more desirable and practical than the prior art, but the above embodiments are only specifically described for the preferred embodiment of the present invention. The present invention is not intended to limit the scope of the invention, and all other equivalents and modifications may be included in the scope of the invention covered by the invention.

1‧‧‧Interleaved drive circuit

2‧‧‧Resonance slot

3‧‧‧ double voltage rectifier

V _s ‧‧‧ input voltage

i _s ‧‧‧Input current

C ₁ ‧‧‧First voltage divider capacitor

V _c1 ‧‧‧First voltage divider capacitor voltage

i _c1 ‧‧‧First voltage divider capacitor current

C ₂ ‧‧‧Second voltage divider capacitor

V _c2 ‧‧‧Second voltage divider capacitor voltage

i _c2 ‧‧‧Second voltage divider current

V _{gs1 ‧‧‧first} drive voltage

V _{gs2 ‧‧‧second} drive voltage

S ₁ ‧‧‧first power switch

D ₁ ‧‧‧First Switching Diode

V _ds1 ‧‧‧first power switch voltage

i _s1 ‧‧‧first power switch current

Second power switch S ₂ ‧‧‧

D ₂ ‧‧‧Second switch diode

V _ds2 ‧‧‧second power switch voltage

i _s2 ‧‧‧second power switch current

C _s ‧‧‧Resonance Capacitor

V _cs ‧‧‧resonant capacitor voltage

i _cs ‧‧‧resonant capacitor current

L _p ‧‧‧First Resonance Inductance

V _Lp ‧‧‧First Resonant Inductor Voltage

i _Lp ‧‧‧First Resonant Inductor Current

L _s ‧‧‧second resonance inductor

V _Ls ‧‧‧Second resonant inductor voltage

i _Ls ‧‧‧Second resonant inductor current

V _a ‧‧‧Resonant input voltage

V _b ‧‧‧Resonance output voltage

i _b ‧‧‧Resonance output current

DR1 ‧‧‧First Diode

V _DR1 ‧‧‧first diode voltage

i _DR1 ‧‧‧first diode current

DR2 ‧‧‧Secondary

V _DR2 ‧‧‧Second diode voltage

i _DR2 ‧‧‧Second diode current

C ₃ ‧‧‧third capacitor

V _c3 ‧‧‧ third capacitor voltage

i _c3 ‧‧‧third capacitor current

C ₄ ‧‧‧fourth capacitor

V _c4 ‧‧‧fourth capacitor voltage

i _c4 ‧‧‧fourth capacitor current

C _o ‧‧‧Filter Capacitor

V _co ‧‧‧Filter capacitor voltage

i _co ‧‧‧Filter capacitor current

R ‧‧‧load

V _o ‧‧‧output voltage

I _o ‧‧‧Output current

Claims (1)

A power generation converter is mainly provided with an input voltage, a first voltage dividing capacitor, a second voltage dividing capacitor, an interleaved driving circuit, a resonance tank, a voltage doubler rectifier, a filter capacitor and a load, and the input voltage is formed. One end is connected to one end of the first voltage dividing capacitor and the first power switch of the interleaved driving circuit, and the other end of the first voltage dividing capacitor is connected to one end of the second voltage dividing capacitor, One end of the first resonant inductor of the resonant tank, one end of the third capacitor of the voltage doubler rectifier, and one end of the fourth capacitor of the voltage doubler rectifier, the other end of the second voltage dividing capacitor is connected to the other end of the input voltage And a source of the second power switch of the interleaved driving circuit, a source of the first power switch of the interleaved driving circuit is connected to a drain of the second power switch of the interleaved driving circuit and a resonance of the resonant tank One end of the capacitor, the other end of the resonant capacitor of the resonant tank is connected to one end of the second resonant inductor of the resonant tank, and the other end of the second resonant inductor of the resonant tank is connected to the resonant tank The other end of the resonant inductor, one end of the first diode of the voltage doubler rectifier, and one end of the second diode of the voltage doubler rectifier, the other end of the first diode of the voltage doubler rectifier is connected to the multiple The other end of the third capacitor of the voltage rectifier, one end of the filter capacitor and one end of the load, the other end of the second diode of the voltage doubler rectifier is connected to the other end of the fourth capacitor of the voltage doubler rectifier, The other end of the filter capacitor and the other end of the load have an input voltage of 150V, an output voltage of 143V, an output power of 169W, and a switching frequency of 115kHz.