TWI696349B - High voltage gain step-up converter - Google Patents

Abstract

Embodiments disclose a high voltage gain step-up converter for receiving an input voltage and converting it into a voltage output to a load. The high voltage gain step-up converter includes a first inductance, a second inductance, a third inductance, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a first capacitor, a second capacitor, a third capacitor, a switch, an output diode and an output capacitor. By turning on and off the switch in accordance with the desired state of the diodes, the first inductance, the second inductance, the third inductance, the first capacitor, the second capacitor and the third capacitor are connected in series or in parallel to storage or release the energy of the input voltage via the output diode, and the output capacitor stores or releases the energy.

Description

High power boost power conversion device

The invention relates to a high-power boosting power conversion device, in particular to a high-power boosting power conversion device using multiple inductance and multiple capacitance switching technologies to achieve a high-power boosting conversion effect.

Referring to the first figure, it is a conventional step-up power conversion device that receives an input voltage V _in and converts it into an output voltage V _{o to} provide a load R. The step-up power conversion device includes a first inductor L ₀₁ , a Second inductance L ₀₂ , a first diode D ₀₁ , a second diode D ₀₂ , a third diode D ₀₃ , a fourth diode D ₀₄ , a switch S ₀₁ , and an output Capacitor C ₀₁ .

The positive terminal of a first end of a first inductor L _01a having the first inductor L ₀₁ is electrically connected to the input voltage V _in, and a second end of the first inductor L _01b, the second inductor having a second inductance L ₀₂ A first end L _02a and a second inductor second end L _02b , the first diode D ₀₁ has a first diode anode D _01a electrically connected to the second end L _01b of the first inductor, and a first A diode cathode D _01b , the second diode D ₀₂ has a second diode anode D _02a electrically connected to the second end L _01b of the first inductor, and electrically connected to the first end L of the second inductor a cathode of the second diode D _{02b 02a} of the third diode D ₀₃ is electrically connected with the input voltage V _in a positive terminal of the third diode anode D _03a, and a second inductor electrically connected to the second a fourth diode D the anode a cathode of the third diode D L _02a end _03B of the fourth diode D ₀₄ is electrically connected with the cathode of the first diode D of _{04A 01B,} and a fourth A diode cathode D _04b , the switch S ₀₁ has a switch first terminal S _01a electrically connected to the cathode diode D _01b of the first diode D ₀₁ , and a switch second electrically connected to the negative terminal of the input voltage V _in At the terminal S _01b , the output capacitor C _{01 is} electrically connected between the fourth diode cathode D _04b and the negative terminal of the input voltage V _in , and the load R is connected in parallel with the output capacitor C ₀₁ .

The voltage-gain ratio of the conventional boost-type power conversion device is (1+D)/(1-D), where D is a duty cycle of the switch S ₀₁ and D is between 0 and 1. However, there is still room for further improvement in the voltage gain ratio of the boost type power conversion device.

Therefore, the purpose of the present invention is to provide a high-power boost power conversion device with high power boost.

Therefore, the high-power boost power conversion device of the present invention receives an input voltage and converts the input voltage into an output voltage to a load, and the high-power boost power conversion device includes a first inductor, a second inductor, and a third Inductor, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a first capacitor, a second capacitor, a third Capacitor, a switch, an output diode, and an output capacitor.

The first inductor has a first end of a first inductor electrically connected to the positive pole of the input voltage, and a second end of a first inductor, the second inductor has a first end of a second inductor, and a second second inductor End, the third inductor has a first end of a third inductor, and a second end of a third inductor, the first diode has a first diode anode electrically connected to the second end of the first inductor, and an electric A first diode cathode connected to the second end of the third inductor, the second diode has a second diode anode electrically connected to the positive electrode of the input voltage, and a first diode electrically connected to the first end of the second inductor A second diode cathode, the third diode has a third diode anode electrically connected to the second end of the second inductor, and a third diode cathode electrically connected to the second end of the third inductor, The fourth diode has a fourth diode anode electrically connected to the positive pole of the input voltage, and a fourth diode cathode electrically connected to the first end of the third inductor, and the fifth diode has electrical A fifth diode anode connected to the positive pole of the input voltage, and a fifth diode cathode, the first capacitor has a first capacitor first end electrically connected to the second end of the first inductor, and electrically connected to the A first capacitor second end of the first end of the second inductor, the second capacitor has a second capacitor first end electrically connected to the second end of the second inductor, and a first capacitor electrically connected to the first end of the third inductor The second end of the second capacitor, The third capacitor has a first terminal of a third capacitor electrically connected to the second terminal of the third inductor, and a second terminal of a third capacitor electrically connected to the cathode of the fifth diode, and the switch is electrically connected to the first two A first terminal of a switch of the cathode of the polar body and a second terminal of a switch electrically connected to the negative electrode of the input voltage are controlled to switch between a conducting state and a non-conducting state. The output diode has an electrical connection to the first An output diode anode and an output diode cathode at the second terminal of the three capacitors, the output capacitor has a first terminal of an output capacitor electrically connected to the output diode cathode, and an output electrically connected to the second terminal of the switch At the second end of the capacitor, the output voltage across the output capacitor is the output voltage, and the load is connected in parallel with the output capacitor to receive the output voltage.

Further, when the switch is in the on state, the energy of the input voltage passes through the first diode, the second diode, the third diode, the fourth diode, and the fifth diode And the switch is transmitted to the first inductance, the second inductance, the third inductance, the first capacitance, the second capacitance, and the third capacitance, the first inductance, the second inductance, the third inductance , The first capacitor, the second capacitor, and the third capacitor are all connected in parallel with the input voltage and store the energy of the input voltage, and the output capacitor releases energy to provide the output voltage to the load, when the switch is not In the on state, the input voltage is connected in series with the first inductor, the first capacitor, the second inductor, the second capacitor, the third inductor, and the third capacitor, and the stored output is released through the output diode Energy is provided to the output capacitor and the load.

Further, the voltage gain ratio of the output voltage to the input voltage is (4-D)/(1-D), where D is a duty cycle between the switch switching between the conductive state and the non-conductive state, and D is Between 0 and 1.

Further, the inductance values of the first inductor, the second inductor, and the third inductor are the same.

Further, the capacitance values of the first capacitor, the second capacitor, and the third capacitor are the same.

Further, the high-power boosting power conversion device further includes a control unit that outputs a pulse modulation signal, and the switch receives the pulse modulation signal and is controlled by the pulse modulation signal to switch to the on state and Between non-conducting states.

Further, the switch is an N-type metal oxide semiconductor field effect transistor.

According to the above technical features, the following effects can be achieved:

1. By the switching of the switch, in accordance with whether the first diode to the fifth diode are conducting, the first inductor, the second inductor, the third inductor, the first capacitor, the second The capacitor and the third capacitor are in a parallel or series state to store or release the energy of the input voltage through the output diode, and the output capacitor stores or releases the energy, so that the high power boost power conversion device of the present invention is in When boosting, it has a voltage gain with high boost, where the voltage gain is (4-D)/(1-D), and D is the duty cycle of the switch.

2. The high-power boosting power conversion device of the present invention only needs to use the switch to achieve a high-power boosting voltage gain, so it has a low-cost effect.

(V _in ): input voltage

(V _o ): output voltage

(R): load

(L ₁ ): the first inductance

(L _1a ): the first end of the first inductor

(L _1b ): the second end of the first inductor

(L ₂ ): second inductance

(L _2a ): the first end of the second inductor

(L _2b ): the second end of the second inductor

(L ₃ ): third inductance

(L _3a ): the first end of the third inductor

(L _3b ): the second end of the third inductor

(D ₁ ): the first diode

(D _1a ): the first diode anode

(D _1b ): the first diode cathode

(D ₂ ): Second diode

(D _2a ): second diode anode

(D _2b ): the second diode cathode

(D ₃ ): third diode

(D _3a ): third diode anode

(D _3b ): the third diode cathode

(D ₄ ): fourth diode

(D _4a ): fourth diode anode

(D _4b ): Fourth diode cathode

(D ₅ ): Fifth diode

(D _5a ): Fifth diode anode

(D _5b ): fifth diode cathode

(C ₁ ): the first capacitor

(C _1a ): the first end of the first capacitor

(C _1b ): the second terminal of the first capacitor

(C ₂ ): second capacitor

(C _2a ): the first end of the second capacitor

(C _2b ): the second terminal of the second capacitor

(C ₃ ): third capacitor

(C _3a ): the first end of the third capacitor

(C _3b ): the second terminal of the third capacitor

(S ₁ ): switch

(S _1a ): Switch first end

(S _1b ): Switch second end

(D _o ): output diode

(D _0a ): output diode anode

(D _0b ): output diode cathode

(C _o ): output capacitance

(C _oa ): the first end of the output capacitor

(C _ob ): the second end of the output capacitor

(1): Control unit

[Figure 1] is a circuit diagram illustrating a conventional boost-type power conversion device.

[Second figure] is a circuit diagram illustrating an embodiment of the high-power boost power conversion device of the present invention.

[Third figure] is an operation timing chart illustrating the operation timing of this embodiment.

[Fourth figure] is a circuit diagram illustrating that the embodiment operates in a first stage.

[Fifth figure] is a circuit diagram illustrating the operation of this embodiment in a second stage.

[Sixth figure] is a simulation waveform diagram illustrating the operation of the embodiment when the input voltage is 24V, an output voltage is 200V, and a full-load output power is 200W, the output voltage, the input voltage and a first capacitor Analog waveform of cross pressure.

[Seventh figure] is a simulation waveform diagram illustrating the simulation waveform of the voltage across a first inductor and the gate-source signal of a switch in this embodiment.

[Figure 8] is a simulation waveform diagram illustrating the simulation waveform of the current flowing through a first inductor, a second electricity, and a third inductor in this embodiment.

[Figure 9] is an analog waveform diagram illustrating the analog waveform of the switch and the voltage across the first diode of the embodiment.

[Figure 10] is a simulation waveform diagram illustrating the simulation waveforms of the cross voltage of a second diode and a fourth diode in this embodiment.

[Figure 11] is a simulation waveform diagram illustrating the simulation waveforms of the trans-voltage of a fifth diode and an output diode of this embodiment.

Based on the above technical features, the main functions of the high-power boost power conversion device of the present invention will be clearly shown in the following embodiments.

Referring to the second figure, an embodiment of the high-power boost power conversion device of the present invention is suitable for receiving an input voltage V _in and converting the input voltage V _in into an output voltage V _o to a load R. The input voltage V _in is A DC voltage, the output voltage _Vo is also a DC voltage. The high-power boost power conversion device includes a first inductor L ₁ , a second inductor L ₂ , a third inductor L ₃ , a first diode D ₁ , a second diode D ₂ , and a third Diode D ₃ , a fourth diode D ₄ , a fifth diode D ₅ , a first capacitor C ₁ , a second capacitor C ₂ , a third capacitor C ₃ , a switch S ₁ , an output diode D _o, an output capacitor C _o, and a control unit 1.

A positive electrode of the first inductor L ₁ having a first inductor electrically connected to the first input voltage V _in terminal L _1a, a first and a second end of the inductor L _1b. The second inductor L ₂ has a first end L _{2a of the} second inductor and a second end L _{2b of the} second inductor. The third inductor L ₃ has a third inductor first end L _3a and a third inductor second end L _3b . The inductance values of the first inductance L ₁ , the second inductance L ₂ , and the third inductance L ₃ are the same.

The first diode D ₁ has a first diode anode D _1a electrically connected to the second end L _1b of the first inductor, and a cathode D _1b electrically connected to the second end L _3b of the third inductor. The second diode D ₂ has electrically connected to the positive input voltage V _in to an anode of the second diode D _2a, and is electrically connected to a first end of the second inductor L _2a is a second cathode diode D _2b . The third diode D ₃ has a third diode anode D _3a electrically connected to the second end L _2b of the second inductor, and a third diode electrically connected to the second end L _3b of the third inductor Cathode D _3b . The fourth diode is electrically connected to the D _{input. 4} having a voltage V _in a positive electrode of the anode of the fourth diode D _4a, and electrically connected to the first end of the third inductor L _3a is a cathode of the fourth diode D _4b . A fifth diode D _5a anode of the fifth diode D ₅ is connected electrically with the input voltage V _in the positive electrode, and a cathode of the fifth diode D _5b thereof.

The first capacitor C ₁ has a first capacitor first end C _1a electrically connected to the first inductor second end L _1b , and a first capacitor second end C electrically connected to the second inductor first end L _{2a 1b} . The second capacitor C ₂ has a second capacitor first terminal C _2a electrically connected to the second inductor second terminal L _2b , and a second capacitor second terminal C electrically connected to the third inductor first terminal L _{3a 2b} . The third capacitor C ₃ has a third capacitor first terminal C _3a electrically connected to the third inductor second terminal L _3b , and a third capacitor second terminal C electrically connected to the fifth diode cathode D _{5b 3b} . The capacitance values of the first capacitor C ₁ , the second capacitor C ₂ , and the third capacitor C ₃ are the same.

The switch S ₁ is an N-type metal oxide semiconductor field effect transistor, and has a switch first end S _1a electrically connected to the first diode cathode D _1b and a negative electrode electrically connected to the input voltage V _in A switch second terminal S _1b is controlled to switch between a conducting state and a non-conducting state, wherein the switch first terminal S _1a is a drain, and the switch second terminal S _1b is a source.

The output diode D _o having a third capacitor electrically connected to the second output terminal of a C _3b anode of the diode D _oa, and a cathode of the output diode D _ob. The output capacitor C _o having a cathode electrically connected to the output of two D _ob first terminal of an output capacitor C _OA, and a second switch electrically connected to the terminal S of a second terminal of the output capacitor C _{ob 1b} of the electrode body, the output capacitor C The cross voltage of _o is the output voltage V _o , and the load R is connected in parallel with the output capacitor C _o to receive the output voltage V _o .

The control unit 1 outputs a pulse modulation signal, the switch S ₁ is to receive the pulse modulation signal, and receiving the pulse signal controlling to switch between a conducting state and a nonconducting state. The switching timing diagram of the switch S ₁ will be further described in two stages below.

Referring to the third figure, which is an operation timing diagram of this embodiment, wherein the parameter v _GS1 represents the voltage of the pulse modulation signal that controls whether the switch S ₁ is turned on, and is also the gate-source signal of the switch S ₁ , parameter v _L1 , v _L2 , and v _L3 represent the voltages of the first inductance L ₁ , the second inductance L ₂ , and the third inductance L ₃ , and the parameters i _L1 , i _L2 , and i _L3 respectively represent the flow through the first Inductance L ₁ , the second inductance L ₂ , and the current of the third inductance L ₃ , the parameters v _S1 and V _D5 represent the voltage across the switch S ₁ and the fifth diode D ₅ , the parameters v _D1 , v _D4 represents the _{transpressure} of the first diode D ₁ and the fourth diode D ₄ respectively, and the parameters v _D2 and v _D3 respectively represent the second diode D ₂ and the third diode D ₃ The voltage across D, the parameter v _D0 represents the voltage across the output diode D _o , the parameter T _S represents the cycle time of the pulse modulation signal, the parameter D is the switch S ₁ switches between the conducting state and the non-conducting state Is a duty cycle and D is between 0 and 1. The parameter T _S is a cycle that the switch S ₁ switches.

Referring to the fourth and fifth diagrams, it is a circuit diagram of the two-stage operation of this embodiment, wherein the conducting elements are indicated by solid lines, and the non-conducting elements are indicated by dotted lines.

The first stage (time: t ₀ -t ₁ ):

See FIG third and fourth diagram, wherein the gate switch S ₁ - v _GS1 source signal is greater than zero, the switch S ₁ is turned on state, the first diode D _1, the second diode D _2. The third diode D ₃ , the fourth diode D ₄ , and the fifth diode D ₅ are conducting, and the output diode D _o is non-conducting.

The current path in the first stage is shown by the arrow in the fourth diagram. The energy of the input voltage V _in passes through the first diode D ₁ , the second diode D ₂ , the third diode D ₃ , the fourth diode D ₄ , and the fifth diode D ₅ and the switch S _{1 are} transmitted to the first inductor L ₁ , the second inductor L ₂ , the third inductor L ₃ , the first capacitor C ₁ , the second capacitor C ₂ , and the third capacitor C ₃ , then the first inductance L ₁ , the second inductance L ₂ , the third inductance L ₃ , the first capacitor C ₁ , the second capacitor C ₂ , and the third capacitor C _{3 are} all related to the input voltage V _in parallel and storing the energy of the input voltage V _in. Since the inductance values of the first inductance L ₁ , the second inductance L ₂ , and the third inductance L ₃ are the same, they respectively span the first inductance L ₁ , the second inductance L ₂ , and the third When the voltage value of the inductor L ₃ is equal to the input voltage V _in , the current flowing through the first inductor L ₁ , the second inductor L ₂ , and the third inductor L ₃ increases linearly. In addition, the first capacitor C ₁ , the second capacitor C ₂ , and the third capacitor C _{3 have} the same capacitance value, and then span the first capacitor C ₁ , the second capacitor C ₂ , and the third capacitor, respectively The voltage values of the capacitor C ₃ are all equal to the input voltage V _in . The first diode D ₁ , the second diode D ₂ , the third diode D ₃ , the fourth diode D ₄ , the fifth diode D ₅ and the switch S ₁ are On, the first diode D ₁ , the second diode D ₂ , the third diode D ₃ , the fourth diode D ₄ , the fifth diode D ₅ and the switch The cross pressure of S ₁ is zero. The output capacitor C _o releases energy to provide the output voltage V _o to the load R. The output diode D _o is non-conductive, the voltage stress of this output diode D _o is equal to the input voltage minus the output voltage. When the time is t ₁ and the switch S ₁ is controlled to switch to the non-conducting state, the first phase ends.

The second stage (time: t ₁ -t ₂ ):

See FIG third and fifth FIG, wherein the gate switch S ₁ - v _GS1 source signal is equal to zero, the switch S ₁ is non-conducting state, the first diode D _1, the second diode D _2. The third diode D ₃ , the fourth diode D ₄ , and the fifth diode D ₅ are non-conductive, and the output diode D _o is conductive. When the time is t ₂ and the switch S ₁ is controlled and switched to the on state, the second phase ends, and returns to the first phase to start a new cycle.

The current path in the second stage is shown by the arrow in the fifth diagram. The input voltage Vin is connected _{in series} with the first inductor L ₁ , the first capacitor C ₁ , the second inductor L ₂ , the second capacitor C ₂ , the third inductor L ₃ , and the third capacitor C ₃ , And the stored energy released through the output diode D _{o is} supplied to the output capacitor C _o and the load R, so that the output voltage C _o and the load R are both the output voltage V _o , at this time, respectively The voltage values across the first inductance L ₁ , the second inductance L ₂ , and the third inductance L ₃ are all equal to (4V _in -V _o )/3, because the first inductance L ₁ , the second inductance L ₂ and the third inductor L ₃ release energy, therefore, the currents i _L1 , i _L2 , i _L3 flowing through the first inductor L ₁ , the second inductor L ₂ , and the third inductor L ₃ are linear Decreases, and the capacitances of the first capacitor C ₁ , the second capacitor C ₂ , and the third capacitor C ₃ are large enough to span the first capacitor C ₁ , the second capacitor C ₂ , and the The voltage value of the third capacitor C ₃ can be regarded as a fixed value, which is equal to the input voltage V _in . When the switch S ₁ and the fifth diode D ₅ are non-conductive, the voltage stress of the switch S ₁ and the fifth diode D ₅ is equal to the output voltage V _o minus the input voltage V _in . The first diode D ₁ and the fourth diode D ₄ are non-conducting, then the voltage stress of the first diode D ₁ and the fourth diode D ₄ is equal to 2 (V _o -V _in )/3. The second diode D ₂ and the third diode D ₃ are non-conducting, then the voltage stress of the second diode D ₂ and the third diode D ₃ is equal to ((V _o -V _in ) / 3. the output diode D _o is turned on, the output of the zero cross voltage of diode D _o.

In the first stage and the second stage, according to the principle of volt-second balance in the first inductor L ₁ , the voltage gain ratio of the output voltage V _o and the input voltage V _in is (4-D)/(1- D).

The present invention operates when the input voltage V _in is 24 volts and the duty cycle D is about 0.592, and an analog waveform diagram of the output voltage V _o is 200 volts and the full-load output power is 200 W is obtained, as shown in the sixth to eleventh diagrams As shown.

Refer to the sixth diagram for the analog waveforms of the output voltage V _o , the voltage across the first capacitor C ₁ and the input voltage V _in . The horizontal axis is time and the scale is 10ms/div, and the vertical axis is voltage and the scale is 50V/div. The voltage across the first capacitor C ₁ is 24 volts. From this figure, it can be verified that the present invention can boost a low DC voltage to a high DC voltage, and indeed can provide the effect of a high boost.

Referring to the seventh diagram, it is the analog waveform of the voltage across the first inductor L ₁ v _L1 and the gate-source signal v _GS1 of the switch S ₁ . The horizontal axis is time and the scale is 20 μs/div, and the vertical axis is voltage and the scale is v _L1 : 20 V/div. Wherein, when the switch S ₁ is in the on state, the voltage across the first inductor L ₁ v _L1 =V _in =24 volts. When the switch S ₁ is in a non-conducting state, the voltage across the first inductor L ₁ v _L1 =(4V _in -V _o )/3=-34.7 volts.

Referring to the eighth figure, the simulated waveforms of the currents i _L1 , i _L2 , i _L3 flowing through the first inductor L ₁ , the second inductor L ₂ , and the third inductor L ₃ . The horizontal axis is time and the scale is 20 μs/div, and the vertical axis is current and the scale is 5 A/div. It can be seen from this figure that when the switch S ₁ is in a conducting state and a non-conducting state, the first inductor L ₁ , the second inductor L ₂ , and the third inductor L ₃ operate in the continuous conduction mode.

Refer to the ninth figure for the simulation waveforms of the voltage across the switch S ₁ and the voltage across the first diode D ₁ . The horizontal axis is time and the scale is 20 μs/div, and the vertical axis is voltage and the scale is 100 V/div. Wherein, when the switch S ₁ is in a non-conducting state, the voltage stress of the switch S ₁ is (V _o -V _in )=176 volts, and the first diode D ₁ is in a non-conducting state, and the first diode The voltage stress of the body D ₁ is 2(V _o -V _in )/3=117 volts.

Refer to the tenth figure for the simulation waveforms of the trans-voltage of the second diode D _{2 and} the trans-voltage of the fourth diode D ₄ . The horizontal axis is time and the scale is 20 μs/div, and the vertical axis is voltage and the scale is 100 V/div. When the second diode D ₂ is in a non-conducting state, the voltage stress of the second diode D ₂ is (V _o -V _in )/3=58 volts, and the fourth diode D ₄ In the non-conducting state, the voltage stress of the fourth diode D ₄ is 2(V _o -V _in )/3=117 volts.

Refer to the eleventh figure for the simulation waveforms of the trans-voltage of the fifth diode D _{5 and} the trans-voltage of the output diode D _o . The horizontal axis is time and the scale is 20 μs/div, and the vertical axis is voltage and the scale is 100 V/div. When the fifth diode D ₅ is in a non-conducting state, the voltage stress of the fifth diode D ₅ is (V _o -V _in )=176 volts, and the output diode D _o is in a conducting state ; when the output diode D _o is a non-conducting state, the voltage stress of the output diode D _o of (V _o -V _in) = 176 volts, while the fifth diode D ₅ to conducting state. From the display of the above analog waveforms, it is verified that the operation mode of the present invention is consistent with the foregoing analysis.

In summary, the above embodiments have the following advantages:

1. By the switching of the switch S ₁ , according to whether the first diode D ₁ to the fifth diode D ₅ are turned on, the first inductance L ₁ , the second inductance L ₂ , and the third The inductor L ₃ , the first capacitor C ₁ , the second capacitor C ₂ , and the third capacitor C ₃ are in a parallel or series state to store or release the energy of the input voltage V _in through the output diode D _o , And the output capacitor C _o stores or releases energy, so that the high-power boost power conversion device of the present invention has a high-voltage boost voltage gain when boosting, wherein the voltage gain is (4-D)/(1-D ), D is the duty cycle of the switch S ₁ .

2. The high-power boosting power conversion device of the present invention only needs to use the switch S ₁ to achieve a high-power boosting voltage gain, thus having a low-cost effect.

Based on the description of the above embodiments, the operation, use and effects of the present invention can be fully understood. However, the above-mentioned embodiments are only preferred embodiments of the present invention, and cannot be used to limit the implementation of the present invention. The scope, that is, simple equivalent changes and modifications made in accordance with the scope of the present invention's patent application and the description of the invention, is within the scope of the present invention.

(V _in ): input voltage

(V _o ): output voltage

(R): load

(L ₁ ): the first inductance

(L _1a ): the first end of the first inductor

(L _1b ): the second end of the first inductor

(L ₂ ): second inductance

(L _2a ): the first end of the second inductor

(L _2b ): the second end of the second inductor

(L ₃ ): third inductance

(L _3a ): the first end of the third inductor

(L _3b ): the second end of the third inductor

(D ₁ ): the first diode

(D _1a ): the first diode anode

(D _1b ): the first diode cathode

(D ₂ ): Second diode

(D _2a ): second diode anode

(D _2b ): the second diode cathode

(D ₃ ): third diode

(D _3a ): third diode anode

(D _3b ): the third diode cathode

(D ₄ ): fourth diode

(D _4a ): fourth diode anode

(D _4b ): Fourth diode cathode

(D ₅ ): Fifth diode

(D _5a ): Fifth diode anode

(D _5b ): fifth diode cathode

(C ₁ ): the first capacitor

(C _1a ): the first end of the first capacitor

(C _1b ): the second terminal of the first capacitor

(C ₂ ): second capacitor

(C _2a ): the first end of the second capacitor

(C _2b ): the second terminal of the second capacitor

(C ₃ ): third capacitor

(C _3a ): the first end of the third capacitor

(C _3b ): the second terminal of the third capacitor

(S ₁ ): switch

(S _1a ): Switch first end

(S _1b ): Switch second end

(D _o ): output diode

(D _0a ): output diode anode

(D _0b ): output diode cathode

(C _o ): output capacitance

(C _oa ): the first end of the output capacitor

(C _ob ): the second end of the output capacitor

(1): Control unit

Claims (7)

A high-power boost power conversion device receives an input voltage and converts the input voltage into an output voltage to a load, and the high-power boost power conversion device includes: a first inductor having a positive electrode electrically connected to the positive pole of the input voltage A first end of the first inductance, and a second end of the first inductance; a second inductance, having a first end of a second inductance, and a second end of a second inductance; a third inductance, having a third inductance A first end, and a second end of a third inductor; a first diode having a first diode anode electrically connected to the second end of the first inductor, and a first diode electrically connected to the second end of the third inductor A diode cathode; a second diode having a second diode anode electrically connected to the positive electrode of the input voltage, and a second diode cathode electrically connected to the first end of the second inductor; one The third diode has a third diode anode electrically connected to the second end of the second inductor, and a third diode cathode electrically connected to the second end of the third inductor; a fourth diode has A fourth diode anode electrically connected to the positive pole of the input voltage, and a fourth diode cathode electrically connected to the first end of the third inductor; a fifth diode having a positive pole electrically connected to the input voltage A fifth diode anode and a fifth diode cathode; a first capacitor having a first capacitor first end electrically connected to the second end of the first inductor, and electrically connected to the second inductor first A first capacitor second end of the terminal; a second capacitor having a second capacitor first end electrically connected to the second end of the second inductor, and a second capacitor second electrically connected to the first end of the third inductor A third capacitor having a first terminal of a third capacitor electrically connected to the second terminal of the third inductor, and a second terminal of a third capacitor electrically connected to the cathode of the fifth diode; A switch having a switch first end electrically connected to the cathode of the first diode, and a switch second end electrically connected to the negative pole of the input voltage, and is controlled to switch between a conducting state and a non-conducting state; An output diode having an output diode anode electrically connected to the second end of the third capacitor and an output diode cathode; and an output capacitor having an output capacitor electrically connected to the output diode cathode One end, and a second end of an output capacitor electrically connected to the second end of the switch, the voltage across the output capacitor is the output voltage, and the load is connected in parallel with the output capacitor to receive the output voltage. The high power boost power conversion device as described in item 1 of the patent application scope, wherein, when the switch is in the on state, the energy of the input voltage passes through the first diode, the second diode, and the third The diode, the fourth diode, the fifth diode and the switch are transmitted to the first inductor, the second inductor, the third inductor, the first capacitor, the second capacitor, and the first Three capacitors, the first inductor, the second inductor, the third inductor, the first capacitor, the second capacitor, and the third capacitor are all connected in parallel with the input voltage and store the energy of the input voltage, and the output The capacitor releases energy to provide the output voltage to the load. When the switch is in a non-conducting state, the input voltage and the first inductor, the first capacitor, the second inductor, the second capacitor, the third inductor, The third capacitor is connected in series, and the stored energy is released through the output diode and provided to the output capacitor and the load. The high-power boost power conversion device as described in item 1 of the patent scope, wherein the voltage gain ratio of the output voltage to the input voltage is (4-D)/(1-D), where D is the switch A duty cycle between the conducting state and the non-conducting state, and D is between 0 and 1. The high power boost power conversion device as described in item 1 of the patent scope, wherein the inductance values of the first inductor, the second inductor, and the third inductor are the same. The high-power boost power conversion device as described in item 1 of the patent application scope, wherein the capacitance values of the first capacitor, the second capacitor, and the third capacitor are the same. The high-power boost power conversion device as described in item 1 of the patent application scope further includes a control unit that outputs a pulse modulation signal, and the switch receives the pulse modulation signal and is modulated by the pulse modulation The signal is controlled to switch between the conducting state and the non-conducting state. The high power boost power conversion device as described in item 1 of the patent application scope, wherein the switch is an N-type metal oxide semiconductor field effect transistor.

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