Dual-output energy conversion device, modulation method and power supply equipment

Abstract

The dual-output energy conversion device, modulation method and power supply equipment provided by the present invention can greatly improve the bus voltage boosting capability of the conversion device by adopting the first electrical energy storage module, so that it can be used within a wider input voltage range. The first conversion output circuit and the second conversion output circuit are provided, and the voltage stress of all switch tubes is reduced to half of the DC bus voltage, which can greatly reduce the system EMI of the conversion device in high-frequency applications and improve the power conversion efficiency of the device. Compared with the traditional multi-stage structure, which needs to realize the midpoint voltage clamping of the front stage and the rear stage and other controls at the same time, and the control structure is complicated, the dual-output energy conversion device provided by the present invention only needs to realize the control of one-stage power conversion, and the control structure is simple.

Description

Technical Field

[0001] The present invention relates to the field of inverter technology, and in particular to a dual-output energy conversion device, a modulation method and a power supply device. Background Art

[0002] In the case of renewable energy power generation, such as photovoltaic power generation and wind power generation, the inverter is a key device for effectively realizing power conversion. The inverter device in the case of renewable energy power generation mainly has two characteristics: a wide power output voltage range and multi-port output. In order to adapt to this application feature, the inverter device usually needs to have the ability to change the voltage of the power supply, multi-port output, and flexible expansion. The former often uses a two-stage or multi-stage buck-boost power conversion device, while the latter usually uses multiple power conversion devices in parallel, or uses an isolated circuit to achieve single input and multiple outputs.

[0003] Both of the above solutions require more circuit components and complex control schemes, and the voltage stress of the circuit will be very large. Excessive voltage stress will generate a large instantaneous current during the switching process of the power tube, worsening the electromagnetic interference (EMI) of the power supply device and even reducing the power conversion efficiency of the device, which seriously restricts the application of wide bandgap semiconductor devices such as group III nitrides. Summary of the invention

[0004] The objectives of the present invention include, for example, providing a dual-output energy conversion device, a modulation method and a power supply device, which can reduce the voltage stress of the circuit and improve the power conversion efficiency of the device.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, an embodiment of the present invention provides a dual-output energy conversion device, the dual-output energy conversion device comprising: a first energy storage module, a first combined series bridge arm module, a capacitor energy storage module and a second combined series bridge arm module;

[0007] The first energy storage module, the first combined series bridge arm module, the capacitor energy storage module, and the second combined series bridge arm module are connected in sequence;

[0008] The first combined series bridge arm module comprises a first main switch tube bridge arm unit and a first auxiliary tube bridge arm unit connected in series;

[0009] The second combined series bridge arm module comprises a second main switch tube bridge arm unit and a second auxiliary tube bridge arm unit connected in series;

[0010] The first main switch tube bridge arm unit and the second main switch tube bridge arm unit form a first conversion output circuit to output the energy of the first energy storage module and / or the capacitor energy storage module to a subsequent load;

[0011] The first auxiliary tube bridge arm unit and the second auxiliary tube bridge arm unit form a second conversion output circuit to output the energy of the first energy storage module and / or the capacitor energy storage module to a subsequent load.

[0012] In an optional embodiment, the first main switch tube bridge arm unit includes a first main switch tube and a second main switch tube, and the first main switch tube and the second main switch tube are connected in series;

[0013] The second main switch tube bridge arm unit includes a third main switch tube and a fourth main switch tube, and the third main switch tube and the fourth main switch tube are connected in series;

[0014] The capacitor energy storage module includes a first bus capacitor, a first end of the first bus capacitor is electrically connected to the first main switch tube and the third main switch tube; a second end of the first bus capacitor is electrically connected to the second main switch tube and the fourth main switch tube;

[0015] The first conversion output circuit includes a first output end and a second output end, the first output end is formed at the midpoint of the first main switch tube bridge arm unit, and the second output end is formed at the midpoint of the second main switch tube bridge arm unit;

[0016] The first main switch tube, the second main switch tube, the third main switch tube and the fourth main switch tube are used to switch the conduction state according to the driving signal to output the energy of the first energy storage module and the first bus capacitor as an alternating signal to the subsequent load through the first output end and the second output end.

[0017] In an optional embodiment, the first auxiliary pipe bridge arm unit includes a first auxiliary pipe and a second auxiliary pipe, and the first auxiliary pipe and the second auxiliary pipe are connected in series;

[0018] The second auxiliary tube bridge arm unit comprises a third auxiliary tube and a fourth auxiliary tube, and the third auxiliary tube and the fourth auxiliary tube are connected in series;

[0019] The capacitor energy storage module includes a second bus capacitor, which is connected in series with the first bus capacitor; a first end of the second bus capacitor is electrically connected to a second end of the first bus capacitor;

[0020] The first end of the second bus capacitor is also electrically connected to the second auxiliary tube and the fourth auxiliary tube; the second end of the second bus capacitor is electrically connected to the first auxiliary tube and the third auxiliary tube;

[0021] The second conversion output circuit includes a third output terminal and a fourth output terminal, the third output terminal is formed at the midpoint of the first auxiliary tube bridge arm unit, and the fourth output terminal is formed at the midpoint of the second auxiliary tube bridge arm unit;

[0022] The first auxiliary tube, the second auxiliary tube, the third auxiliary tube and the fourth auxiliary tube are used to switch the conduction state according to the driving signal to output the energy of the first energy storage module and the second bus capacitor to the subsequent load through the third output terminal and the fourth output terminal.

[0023] In an optional embodiment, the dual-output energy conversion device further includes a first filtering module and a second filtering module;

[0024] The first filtering module is electrically connected to the output end of the first conversion output circuit, and is used to convert the alternating signal output by the first conversion output circuit into a standard sinusoidal signal;

[0025] The second filtering module is electrically connected to the output end of the second conversion output circuit, and is used to convert the alternating signal output by the second conversion output circuit into a standard sinusoidal signal.

[0026] In an optional embodiment, the dual-output energy conversion device includes a first anti-backflow module;

[0027] The first anti-backflow module is arranged between the first energy storage module and the first conversion output circuit; the first anti-backflow module is used to prevent energy backflow of the first conversion output circuit.

[0028] In an optional embodiment, the dual-output energy conversion device includes a second anti-backflow module;

[0029] The second anti-backflow module is arranged between the second conversion output circuit and the negative pole of the power supply, and the second anti-backflow module is used to prevent the energy backflow of the second conversion output circuit.

[0030] In an optional embodiment, the first energy storage module is arranged between the positive electrode of the power supply and the first conversion output circuit;

[0031] The first energy storage module includes at least one diode, and the first energy storage module also includes at least one of an inductor and a capacitor.

[0032] In an optional embodiment, the switch tubes in the first combined series bridge arm module and the second combined series bridge arm module are both group III nitride transistors.

[0033] In a second aspect, an embodiment of the present invention provides a modulation method, which is applied to a dual-output energy conversion device as described in any one of the aforementioned embodiments, and the modulation method includes:

[0034] The first modulated wave input signal is compared with the first carrier input signal and the second carrier input signal to generate a first sinusoidal pulse width signal and a second sinusoidal pulse width signal;

[0035] The second modulated wave input signal is compared with the first carrier input signal and the second carrier input signal to generate a second fixed pulse width signal and a second fixed pulse width signal;

[0036] Generate a first zero-crossing detection signal and a second zero-crossing detection signal by comparing the first modulation wave input signal and the second modulation wave input signal with the driving reference ground signal respectively;

[0037] Generate driving signals Vgs1 to Vgs4 of a first conversion output circuit through a first combinational logic module according to the first sinusoidal pulse width signal, the first fixed pulse width signal and the first zero-crossing point detection signal;

[0038] Generate driving signals Vgsub1 to Vgsub4 of a second conversion output circuit through a second combinational logic module according to the second sinusoidal pulse width signal, the second fixed pulse width signal and the second zero-crossing point detection signal;

[0039] driving the first conversion output circuit according to the driving signals Vgs1 to Vgs4 of the first conversion output circuit;

[0040] driving the second conversion output circuit according to the driving signals Vgsub1 to Vgsub4 of the second conversion output circuit;

[0041] The first carrier input signal and the second carrier input signal have a phase difference of 180 degrees.

[0042] In a third aspect, an embodiment of the present invention provides a power supply device, which includes a dual-output energy conversion device as described in any one of the aforementioned embodiments.

[0043] Compared with the prior art, the dual-output energy conversion device, modulation method and power supply equipment provided by the present invention can greatly improve the bus voltage boosting capability of the conversion device by adopting a first energy storage module, so that it can be used within a wider input voltage range. A first conversion output circuit and a second conversion output circuit are set, and the voltage stress of all switching tubes is reduced to half of the DC bus voltage, which can greatly reduce the system EMI of the conversion device in high-frequency applications and improve the power conversion efficiency of the device. Compared with the traditional multi-stage structure that needs to realize the midpoint voltage clamping and other controls of the front stage and the rear stage at the same time, and the control structure is complicated, the dual-output energy conversion device provided by the present invention only needs to realize the control of one-stage power conversion, and the control structure is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 The schematic diagram of the structure of the dual-output energy conversion device provided in this embodiment is shown;

[0046] Figure 2A The modulation key waveform diagram (D>0.5) provided in this embodiment is shown;

[0047] Figure 2B The modulation key waveform diagram (D≤0.5) provided in this embodiment is shown;

[0048] Figure 3A to Figure 3H The boost inverter (D>0.5) working mode diagram of the dual-output energy conversion device provided in this embodiment is shown;

[0049] Figure 4A to Figure 4E The working mode diagram of the buck-type inverter (D≤0.5) of the dual-output energy conversion device provided in this embodiment is shown;

[0050] Figure 5A to Figure 5C A schematic diagram of a switch tube provided in this embodiment is shown;

[0051] Figure 6 shows a schematic cross-sectional view of a Group III nitride diode provided by this embodiment;

[0052] Figure 7A to Figure 7B The electrical connection diagram of the group III nitride rectifier device provided in this embodiment is shown;

[0053] Figure 8A to Figure 8BA plan cross-sectional view of a group III nitride rectifier device provided in this embodiment is shown;

[0054] Figures 9A to 9C A schematic diagram of a first energy storage module provided in this embodiment is shown;

[0055] Figure 10A to Figure 10C A schematic diagram showing the experimental results of the dual-output electric energy conversion device provided in this embodiment is shown.

[0056] Icon: LCD Unit-first energy storage module; 110-first combination series bridge arm module; 111-first main switch tube bridge arm unit; 112-first auxiliary tube bridge arm unit; 120-capacitor energy storage module; 130-second combination series bridge arm module; 131-second main switch tube bridge arm unit; 132-second auxiliary tube bridge arm unit; B-first output end; A-second output end; C-third output end; D-fourth output end; D1-first backflow prevention module; D1A-first backflow prevention diode; D1B-second backflow prevention diode; D2-second backflow prevention module; D2A-third backflow prevention diode; D2B-fourth backflow prevention diode. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0058] In the case of renewable energy power generation, such as photovoltaic power generation and wind power generation, the inverter is a key device for effectively realizing power conversion. The inverter device in the case of renewable energy power generation mainly has two characteristics: ① wide power output voltage range; ② multi-port output. In order to adapt to this application feature, the inverter device usually needs to have the ability to change the voltage of the power supply, multi-port output, and flexible expansion. The former often uses a two-stage or multi-stage buck-boost power conversion device, while the latter usually uses multiple power conversion devices in parallel, or uses an isolated circuit to achieve single input and multiple outputs.

[0059] Both of the above solutions require more circuit components and complex control schemes, and the voltage stress of the circuit will be very large. Especially with the application of new generation semiconductor devices, the operating frequency of the switching device will be greatly increased, and the excessive voltage stress will produce a large dv / dt during the switching operation of the power tube, worsening the EMI of the power supply device and even reducing the power conversion efficiency of the device, which seriously restricts the application of wide bandgap semiconductor devices such as group III nitrides.

[0060] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a dual-output energy conversion device, please refer to Figure 1 , Figure 1 A schematic structural diagram of a dual-output energy conversion device provided in this embodiment is shown.

[0061] The dual-output energy conversion device includes a power input terminal, a first energy storage module LCD Unit, a first combination series bridge arm module 110 , a capacitor energy storage module 120 , and a second combination series bridge arm module 130 .

[0062] The first energy storage module LCD Unit, the first combined series bridge arm module 110, the capacitor energy storage module 120, and the second combined series bridge arm module 130 are connected in sequence.

[0063] The first energy storage module LCD Unit is electrically connected to the power input terminal, and is used to access the power supply (in this embodiment, the power supply is a DC power supply Uin), store energy and increase the bus voltage. The first combined series bridge arm module 110 includes a first main switch tube bridge arm unit 111 and a first auxiliary tube bridge arm unit 112 connected in series; the second combined series bridge arm module 130 includes a second main switch tube bridge arm unit 131 and a second auxiliary tube bridge arm unit 132 connected in series, the first main switch tube bridge arm unit 111 and the second main switch tube bridge arm unit 131 form a first conversion output circuit (not shown in the figure), and output the energy of the first energy storage module LCD Unit and / or the capacitor energy storage module 120 as an alternating signal to the subsequent load; the first auxiliary tube bridge arm unit 112 and the second auxiliary tube bridge arm unit 132 form a second conversion output circuit (not shown in the figure), and output the energy of the first energy storage module LCD Unit and / or the capacitor energy storage module 120 as an alternating signal to the subsequent load.

[0064] The technical solution provided in this embodiment adopts the first energy storage module LCD Unit to greatly improve the bus voltage boosting capacity of the conversion device so that it can be used within a wider input voltage range. By setting the auxiliary tube and the main switch tube to form two conversion output circuits, the main switch tube is responsible for the energy conversion of the first conversion output circuit, and the auxiliary tube is responsible for the energy conversion of the second conversion output circuit, forming a dual output circuit. At the same time, the auxiliary tube is used to share the voltage stress of the main switch tube, thereby reducing the voltage stress of the system. Only one-level power conversion control needs to be implemented, and the control structure is simple.

[0065] In one possible implementation, see Figure 1 The first main switch tube bridge arm unit 111 includes a first main switch tube S1 and a second main switch tube S2, and the second main switch tube bridge arm unit 131 includes a third main switch tube S3 and a fourth main switch tube S4. The first main switch tube S1 is connected in series with the second main switch tube S2; the third main switch tube S3 is connected in series with the fourth main switch tube S4.

[0066] In a possible implementation, the capacitor energy storage module 120 includes a first bus capacitor Cbus1, and the first end of the first bus capacitor Cbus1 (in this embodiment, the first end is the positive electrode) is electrically connected to the first main switch tube S1 and the third main switch tube S3; the second end of the first bus capacitor Cbus1 (in this embodiment, the second end is the negative electrode) is electrically connected to the second main switch tube S2 and the fourth main switch tube S4.

[0067] The first conversion output circuit includes a first output terminal B and a second output terminal A. The second output terminal A is formed at the midpoint of the first main switch tube bridge arm unit 111, that is, the connection point of the first main switch tube S1 and the second main switch tube S2. The first output terminal B is formed at the midpoint of the second main switch tube bridge arm unit 131, that is, the connection point of the third main switch tube S3 and the fourth main switch tube S4. The first main switch tube S1, the second main switch tube S2, the third main switch tube S3 and the fourth main switch tube S4 are used to switch the conduction state according to the driving signal to convert the energy of the first energy storage module LCD Unit and the first bus capacitor Cbus1 to output an alternating signal to the subsequent load through the first output terminal B and the second output terminal A.

[0068] In one possible implementation, see Figure 1 The first auxiliary tube bridge arm unit 112 includes a first auxiliary tube Ssub1 and a second auxiliary tube Ssub2, and the second auxiliary tube bridge arm unit 132 includes a third auxiliary tube Ssub3 and a fourth auxiliary tube Ssub4, wherein the first auxiliary tube Ssub1 and the second auxiliary tube Ssub2 are connected in series; the third auxiliary tube Ssub3 and the fourth auxiliary tube Ssub4 are connected in series.

[0069] The capacitor energy storage module 120 includes a second bus capacitor Cbus2, which is connected in series with the first bus capacitor Cbus1; the first end of the second bus capacitor Cbus2 (in this embodiment, the first end is the positive electrode) is electrically connected to the second end of the first bus capacitor Cbus1; the first end of the second bus capacitor Cbus2 is also electrically connected to the second auxiliary tube Ssub2 and the fourth auxiliary tube Ssub4; the second end of the second bus capacitor Cbus2 (in this embodiment, the second end is the negative electrode) is electrically connected to the first auxiliary tube Ssub1 and the third auxiliary tube Ssub3.

[0070] The second conversion output circuit includes a third output terminal C and a fourth output terminal D. The third output terminal C is formed at the midpoint of the first auxiliary tube bridge arm unit 112, that is, the connection point of the second auxiliary tube Ssub2 and the first auxiliary tube Ssub1. The fourth output terminal D is formed at the midpoint of the second auxiliary tube bridge arm unit 132, that is, the connection point of the fourth auxiliary tube Ssub4 and the third auxiliary tube Ssub3.

[0071] The first auxiliary tube Ssub1, the second auxiliary tube Ssub2, the third auxiliary tube Ssub3 and the fourth auxiliary tube Ssub4 are used to switch the conduction state according to the driving signal to convert the energy of the first energy storage module LCD Unit and the second bus capacitor Cbus2, and output the alternating signal to the subsequent load through the third output terminal C and the fourth output terminal D.

[0072] In this embodiment, taking the first combined series bridge arm module 110 as an example, the first combined series bridge arm module 110 includes a first main switch tube bridge arm unit 111 and a first auxiliary tube bridge arm unit 112, the first main switch tube bridge arm unit 111 and the first auxiliary tube bridge arm unit 112 are connected in series, wherein the first auxiliary tube bridge arm unit 112 includes a first auxiliary tube Ssub1 and a second auxiliary tube Ssub2, the second auxiliary tube Ssub2 is connected to the second main switch tube S2, similarly, the fourth auxiliary tube Ssub4 is connected to the fourth main switch tube S4.

[0073] The dual-output energy conversion device includes a first anti-backflow module D1 and a second anti-backflow module D2; the first anti-backflow module D1 is arranged between the first energy storage module LCD Unit and the first conversion output circuit; the first anti-backflow module D1 is used to prevent energy backflow in the first conversion output circuit.

[0074] In a possible implementation, the first backcurrent protection module D1 includes a first backcurrent protection diode D1A and a second backcurrent protection diode D1B; the positive poles of the first backcurrent protection diode D1A and the second backcurrent protection diode D1B are electrically connected to the second end of the first energy storage module LCD Unit, the negative pole of the first backcurrent protection diode D1A is electrically connected to the first output end B; the negative pole of the second backcurrent protection diode D1B is electrically connected to the second output end A.

[0075] The second anti-backflow module D2 is arranged between the second conversion output circuit and the negative pole of the power supply, and the second anti-backflow module D2 is used to prevent the energy backflow of the second conversion output circuit.

[0076] In one possible implementation, the second backcurrent protection module D2 includes a third backcurrent protection diode D2A and a fourth backcurrent protection diode D2B; the negative poles of the third backcurrent protection diode D2A and the fourth backcurrent protection diode D2B are electrically connected to the negative pole of the power supply, the positive pole of the third backcurrent protection diode D2A is electrically connected to the third output terminal C; the positive pole of the fourth backcurrent protection diode D2B is electrically connected to the fourth output terminal D.

[0077] In a possible implementation, the first energy storage module LCD Unit is used to store electrical energy when the second main switch tube S2 and the second auxiliary tube Ssub2 are turned on at the same time or when the fourth main switch tube S4 and the fourth auxiliary tube Ssub4 are turned on at the same time, and release electrical energy to the first conversion output circuit, the second conversion output circuit, the first bus capacitor Cbus1 and the second bus capacitor Cbus2 in other cases.

[0078] When the second main switch tube S2 and the second auxiliary tube Ssub2 are turned on at the same time, the first energy storage module LCD Unit is equivalent to the two ends directly connected to the power input end. When the fourth main switch tube S4 and the fourth auxiliary tube Ssub4 are turned on at the same time, the first energy storage module LCD Unit is equivalent to the two ends directly connected to the power input end. At this time, the power supply charges the first energy storage module LCD Unit. In other cases, the first energy storage module LCD Unit is in a discharging state, transferring the stored energy to the load or the first bus capacitor Cbus1 and the second bus capacitor Cbus2.

[0079] In a possible implementation, each switch tube of the first conversion output circuit: the first main switch tube S1, the second main switch tube S2, the third main switch tube S3 and the fourth main switch tube S4 are used to be turned on or off under the control of a driving signal to output an alternating pulse signal through the first output terminal and the second output terminal according to the energy of the first energy storage module LCD Unit and / or the energy of the first bus capacitor Cbus1.

[0080] The switch tubes of the second conversion output circuit: the first auxiliary tube Ssub1, the second auxiliary tube Ssub2, the third auxiliary tube Ssub3 and the fourth auxiliary tube Ssub4 are used to be turned on or off under the control of the driving signal to output an alternating pulse signal through the third output terminal and the fourth output terminal according to the energy of the first energy storage module LCDUnit and / or the energy of the second bus capacitor Cbus2.

[0081] In a possible implementation, the dual-output energy conversion device further includes a first filter module Filto1 and a second filter module Filto2.

[0082] The first filter module Filto1 is electrically connected to the first conversion output circuit, and is used to convert the pulse signal output by the first conversion output circuit into a sinusoidal pulse signal. The first filter module Filto1 includes a first input terminal and a second input terminal, the first input terminal of the first filter module Filto1 is electrically connected to the first output terminal B of the first conversion output circuit, and the second input terminal of the first filter module Filto1 is electrically connected to the second output terminal A of the first conversion output circuit.

[0083] The second filter module Filto2 is electrically connected to the second conversion output circuit, and is used to convert the pulse signal output by the second conversion output circuit into a sinusoidal pulse signal. The second filter module Filto2 includes a first input terminal and a second input terminal, the first input terminal of the second filter module Filto2 is electrically connected to the third output terminal C of the second conversion output circuit, and the second input terminal of the second filter module Filto2 is electrically connected to the fourth output terminal D of the second conversion output circuit.

[0084] In a possible implementation, the first filter module Filto1 and the second filter module Filto2 may be one of an L-type filter module, an LC-type filter module or an LCL-type filter module.

[0085] The first energy storage module LCD Unit is a boost module composed of at least two or more components. For example, the first energy storage module LCD Unit includes at least one diode and at least one of an inductor and a capacitor.

[0086] In a possible implementation, the first energy storage module LCD Unit may also be composed of a number of capacitors and diodes, such as Fig. 9A As shown, in some other possible implementations, the first energy storage module LCD Unit may also be composed of a plurality of inductors, capacitors and diodes, such as Fig. 9B , Fig. 9C shown.

[0087] In a possible implementation, the dual-output energy conversion device further includes an input capacitor, wherein a first end of the input capacitor is electrically connected to the positive electrode of the power supply, and a second end of the input capacitor is electrically connected to the negative electrode of the power supply. The input capacitor is used to absorb the peak voltage outputted by the power supply output terminal, so that the DC signal waveform outputted by the power supply output terminal is smoother.

[0088] The following is an exemplary description of the working principle of the modulation method of the dual-output energy conversion device provided in this embodiment in conjunction with the accompanying drawings.

[0089] The modulation method includes:

[0090] Step 110: Compare the first modulated wave input signal with the first carrier input signal and the second carrier input signal to generate a first sinusoidal pulse width signal and a second sinusoidal pulse width signal.

[0091] Step 120: Generate a second fixed pulse width signal and a second fixed pulse width signal by comparing the second modulated wave input signal with the first carrier input signal and the second carrier input signal respectively.

[0092] Step 130: Generate a first zero-crossing detection signal and a second zero-crossing detection signal by comparing the first modulated wave input signal and the second modulated wave input signal with a driving reference ground signal respectively.

[0093] Step 140: Generate driving signals Vgs1 to Vgs4 of the first conversion output circuit through a first combinational logic module according to the first sinusoidal pulse width signal, the first fixed pulse width signal and the first zero-crossing point detection signal.

[0094] Step 150: Generate driving signals Vgsub1 to Vgsub4 of the second conversion output circuit through a second combinational logic module according to the second sinusoidal pulse width signal, the second fixed pulse width signal and the second zero-crossing detection signal.

[0095] Step 160: driving the first conversion output circuit according to the driving signals Vgs1 to Vgs4 of the first conversion output circuit.

[0096] Step 170: driving the second conversion output circuit according to the driving signals Vgsub1 to Vgsub4 of the second conversion output circuit.

[0097] The first carrier input signal and the second carrier input signal have a phase difference of 180 degrees.

[0098] Specifically, the modulation signal of the dual-output energy conversion device includes a first carrier input signal Vtri1, a second carrier input signal Vtri2, a first modulation wave input signal Vsine, a second modulation wave input signal Vdc, first to fifth comparison modules Comp1~Comp5, a first combination logic module Log1, a second combination logic module Log2, first to fourth main switch tube output drive signals Vgs1~Vgs4, and first to fourth three-level auxiliary tube drive signals Vgsub1~Vgsub4.

[0099] The first carrier input signal Vtri1 and the second carrier input signal Vtri2 have a phase difference of 180°. Both the first carrier input signal Vtri1 and the second carrier input signal Vtri2 are sawtooth wave signals. The first modulation wave input signal Vsine is a sine wave signal. The second modulation wave input signal Vdc is a DC signal.

[0100] The first modulation wave input signal Vsine and the first carrier input signal Vtri1 are passed through the first comparison module Comp1 to generate the first sinusoidal pulse width signal Vspwm1, the second modulation wave input signal Vdc and the first carrier input signal Vtri1 are passed through the second comparison module Comp1 to generate the first fixed pulse width signal Vpwm1, the first modulation wave input signal Vsine and the drive reference ground signal AGND are passed through the fifth comparison module Comp5 to generate the zero crossing detection signal Vzero, the first sinusoidal pulse width signal Vspwm1, the first fixed pulse width signal Vpwm1 and the zero crossing detection signal Vzero are passed through the first combinational logic module Log1 to generate the first to fourth main switch tube output drive signals Vgs1~Vgs4.

[0101] Similarly, the first modulation wave input signal Vsine, the second carrier input signal Vtri2, and the second modulation wave input signal Vdc can be used to generate the first sinusoidal pulse width signal Vspwm2, the first fixed pulse width signal Vpwm2, and the zero-crossing detection signal Vzero through the third comparison module Comp3, the fourth comparison module Comp4, and the fifth comparison module Comp5, and the first to fourth three-level auxiliary tube drive signals Vgsub1~Vgsub4 are generated by the second combinational logic module Log2.

[0102] The step-up and step-down capability of the dual-output energy conversion device is related to the value of the duty cycle D of the first fixed pulse width signal Vpwm1 (or the second fixed pulse width signal Vpwm2), which is divided into two cases: D>0.5 and D≤0.5. The modulation key waveform (sine positive half cycle) is as follows: Figure 2A-2B As shown, in view of the symmetry between the positive and negative half-cycle modulations, only the modulation key waveform diagram of the positive half-cycle is provided in this embodiment.

[0103] See also Figures 3A to 3H , respectively, showing the reference Figure 2A Under the modulation signal shown, the dual-output energy conversion device has different working states in eight boost modes.

[0104] Mode 1: See Figure 3A In this stage, the second main switch tube S2, the third main switch tube S3, the second auxiliary tube Ssub2 and the fourth auxiliary tube Ssub4 are turned on. On the one hand, the power supply charges the first energy storage module LCD Unit through the second main switch tube S2 and the second auxiliary tube Ssub2, and the first energy storage module LCD Unit stores energy. On the other hand, the first bus capacitor Cbus1 provides energy to the first output load Rl1 through the second main switch tube S2 and the third main switch tube S3 and the first filter module Filto1.

[0105] At this time, the potential difference VAB between point A and point B is equal to -Vcbus1, the second conversion output circuit performs the freewheeling task through the second auxiliary tube Ssub2 and the fourth auxiliary tube Ssub4, and the potential difference VCD between point C and point D is equal to 0. The voltage of the first main switch tube S1 is equal to Vcbus1, the voltage of the first auxiliary tube Ssub1 is equal to Vcbus2, the voltage of the fourth main switch tube S4 is equal to Vcbus1, and the voltage of the third auxiliary tube Ssub3 is equal to Vcbus2.

[0106] Mode 2: See Figure 3B , in this stage, the second main switch tube S2, the fourth main switch tube S4, the second auxiliary tube Ssub2, and the fourth auxiliary tube Ssub4 are turned on. On the one hand, the power supply charges the first energy storage module LCD Unit through the second main switch tube S2 and the second auxiliary tube Ssub2, and charges the first energy storage module LCD Unit through the fourth main switch tube S4 and the fourth auxiliary tube Ssub4, and the first energy storage module LCD Unit is charged and stored; on the other hand, the first conversion output circuit performs the freewheeling task through the second main switch tube S2 and the fourth main switch tube S4, and the potential difference VAB between point A and point B is 0, and the second conversion output circuit performs the freewheeling task through the second auxiliary tube Ssub2 and the fourth auxiliary tube Ssub4, and the potential difference VCD between point C and point D is 0. In this mode, the voltage of the first main switch tube S1 is equal to Vcbus1, the voltage of the first auxiliary tube Ssub1 is equal to Vcbus2, the voltage of the third main switch tube S3 is equal to Vcbus1, and the voltage of the third auxiliary tube Ssub3 is equal to Vcbus2.

[0107] Mode 3: See Figure 3C , in this stage, the second main switch tube S2, the fourth main switch tube S4 and the first auxiliary tube Ssub1, the third auxiliary tube Ssub3 are turned on. On the one hand, the power supply charges the second bus capacitor Cbus2 through the second main switch tube S2 and the first auxiliary tube Ssub1, and charges the second bus capacitor Cbus2 through the fourth main switch tube S4 and the third auxiliary tube Ssub3, and the first energy storage module LCD Unit discharges and releases energy; on the other hand, the first conversion output circuit performs the freewheeling task through the second main switch tube S2 and the fourth main switch tube S4. In this mode, the potential difference VAB between point A and point B is 0, and the second conversion output circuit performs the freewheeling task through the first auxiliary tube Ssub1 and the third auxiliary tube Ssub3, and the potential difference VCD between point C and point D is 0. In this mode, the voltage of the first main switch tube S1 is equal to Vcbus1, the voltage of the second auxiliary tube Ssub2 is equal to Vcbus2, the voltage of the third main switch tube S3 is equal to Vcbus1, and the voltage of the fourth auxiliary tube Ssub4 is equal to Vcbus2.

[0108] Mode 4: See Figure 3DIn this stage, the second main switch tube S2, the fourth main switch tube S4 and the second auxiliary tubes Ssub2 and Ssub3 are turned on. On the one hand, the power supply charges the first energy storage module LCDUnit through the second main switch tube S2 and the second auxiliary tube Ssub2, and the first energy storage module LCD Unit charges and stores energy; on the other hand, the first conversion output circuit performs the freewheeling task through the second main switch tube S2 and the fourth main switch tube S4, and the potential difference VAB between point A and point B is 0. The second bus capacitor Cbus2 provides energy to the second output load Rl2 through the second auxiliary tube Ssub2 and the third auxiliary tube Ssub3, and the potential difference VCD between point C and point D is Vcbus2. In this stage, the voltage of the first main switch tube S1 is equal to Vcbus1, the voltage of the first auxiliary tube Ssub1 is equal to Vcbus2, the voltage of the third main switch tube S3 is equal to Vcbus1, and the voltage of the fourth auxiliary tube Ssub4 is equal to Vcbus2.

[0109] Mode 5: See Figure 3E In this stage, the first main switch tube S1, the third main switch tube S3, the second auxiliary tube Ssub2, and the fourth auxiliary tube Ssub4 are turned on. On the one hand, the power supply charges the first bus capacitor Cbus1 through the first main switch tube S1 and the second auxiliary tube Ssub2, and charges the first bus capacitor Cbus1 through the third main switch tube S3 and the fourth auxiliary tube Ssub4, and the first energy storage module LCD Unit discharges and releases energy; on the other hand, the first conversion output circuit performs the freewheeling task through the first main switch tube S1 and the third main switch tube S3, and the potential difference VAB between point A and point B is 0. The second conversion output circuit performs the freewheeling task through the second auxiliary tube Ssub2 and the fourth auxiliary tube Ssub4, and the potential difference VCD between point C and point D is 0. The voltage of the second main switch tube S2 is equal to Vcbus1, the voltage of the first auxiliary tube Ssub1 is equal to Vcbus2, the voltage of the fourth main switch tube S4 is equal to Vcbus1, and the voltage of the third auxiliary tube Ssub3 is equal to Vcbus2.

[0110] Mode 6: See Figure 3FIn this stage, the second main switch tube S2, the third main switch tube S3 and the first auxiliary tube Ssub1 and the third auxiliary tube Ssub3 are turned on, the first energy storage module LCD Unit releases energy to charge the second bus capacitor Cbus2 through the second main switch tube S2 and the first auxiliary tube Ssub1, and charges the second bus capacitor Cbus2 through the second main switch tube S2 and the third auxiliary tube Ssub3, the first energy storage module LCD Unit discharges and releases energy; on the other hand, the first bus capacitor Cbus1 provides energy to the first output load Rl1 through the second main switch tube S2 and the third S3, the potential difference VAB between point A and point B = -Vcbus1, the second conversion output circuit performs the freewheeling task through the first auxiliary tube Ssub1 and the third auxiliary tube Ssub3, and the potential difference VCD between point C and point D = 0. The voltage of the first main switch tube S1 is equal to Vcbus1, the voltage of the second auxiliary tube Ssub2 is equal to Vcbus2, the voltage of the fourth main switch tube S4 is equal to Vcbus1, and the voltage of the fourth auxiliary tube Ssub4 is equal to Vcbus2.

[0111] Mode 7: See Figure 3G In this stage, the first main switch tube S1, the third main switch tube S3, the second auxiliary tube Ssub2, and the third auxiliary tube Ssub3 are turned on. On the one hand, the power supply charges the first bus capacitor Cbus1 through the first main switch tube S1 and the second auxiliary tube Ssub2, and charges the first bus capacitor Cbus1 through the third main switch tube S3 and the second auxiliary tube Ssub2, and the first energy storage module LCD Unit discharges and releases energy; on the other hand, the first conversion output circuit performs the freewheeling task through the first main switch tube S1 and the third main switch tube S3, and the potential difference VAB between point A and point B is 0. The second bus capacitor Cbus2 provides energy to the second output load Rl2 through the second auxiliary tube Ssub2 and the third auxiliary tube Ssub3, and the potential difference VCD between point C and point D is Vcbus2. The voltage of the second main switch tube S2 is equal to Vcbus1, the voltage of the first auxiliary tube Ssub1 is equal to Vcbus2, the voltage of the fourth main switch tube S4 is equal to Vcbus1, and the voltage of the fourth auxiliary tube Ssub4 is equal to Vcbus2.

[0112] Mode 8: See Figure 3H, in this stage, the second main switch tube S2, the third main switch tube S3, the second auxiliary tube Ssub2, and the third auxiliary tube Ssub3 are turned on. On the one hand, the power supply charges the first energy storage module LCD Unit through the second main switch tube S2 and the second auxiliary tube Ssub2, and the first energy storage module LCD Unit charges and stores energy; on the other hand, the first bus capacitor Cbus1 provides energy to the first output load Rl1 through the second main switch tube S2 and the third main switch tube S3, and the potential difference between point A and point B VAB = -Vcbus1, and the second bus capacitor Cbus2 provides energy to the second output load Rl2 through the second auxiliary tube Ssub2 and the third auxiliary tube Ssub3, and the potential difference between point C and point D VCD = Vcbus2. In this stage, the voltage of the first main switch tube S1 is equal to Vcbus1, the voltage of the first auxiliary tube Ssub1 is equal to Vcbus2, the voltage of the fourth main switch tube S4 is equal to Vcbus1, and the voltage of the fourth auxiliary tube Ssub4 is equal to Vcbus2.

[0113] Through at least six of the above eight different stages of working states, in the positive half cycle of the sine wave, the potential difference VAB between point A and point B is always -Vcbus1 or 0, and the potential difference VCD between point C and point D is always Vcbus2 or 0, so that it is converted into a sinusoidal AC signal after filtering by the first filter module Filto1 and the second filter module Filto2 on the output side, and output to the subsequent load. Since the bus voltage Vbus=Vcbus1+Vcbus2=1 / (1-D)*Vin, in this formula, D is the duty cycle of the first fixed pulse width signal Vpwm1 or the second fixed pulse width signal Vpwm2, and Vcbus1=Vcbus2, so when D>0.5, Vcbus1=Vcbus2>Vin, that is, the sinusoidal pulse voltages of the two outputs of the first conversion output circuit and the second conversion output circuit are both higher than the voltage Vin of the power supply, which is a boost type inverter.

[0114] The following is combined with Figure 2B , several possible modes of the bidirectional energy conversion device in the buck mode are introduced.

[0115] Mode 1: See Figure 4AIn this stage, the second main switch tube S2, the third main switch tube S3, the first auxiliary tube Ssub1, and the third auxiliary tube Ssub3 are turned on. On the one hand, the second bus capacitor Cbus2 is charged through the second main switch tube S2 and the first auxiliary tube Ssub1, and the second bus capacitor Cbus2 is charged through the second main switch tube S2 and the third auxiliary tube Ssub3, and the first energy storage module LCD Unit is discharged to release energy; on the other hand, the first bus capacitor Cbus1 provides energy to the first output load Rl1 through the second main switch tube S2 and the third main switch tube S3, and the potential difference between point A and point B VAB = -Vcbus1, and the second conversion output circuit performs the freewheeling task through the first auxiliary tube Ssub1 and the third auxiliary tube Ssub3, and the potential difference between point C and point D VCD = 0. The voltage of the first main switch tube S1 is equal to Vcbus1, the voltage of the second auxiliary tube Ssub2 is equal to Vcbus2, the voltage of the fourth main switch tube S4 is equal to Vcbus1, and the voltage of the fourth auxiliary tube Ssub4 is equal to Vcbus2.

[0116] Mode 2: See Figure 4B , in this stage, the second main switch tube S2, the fourth main switch tube S4 and the first auxiliary tube Ssub1, the third auxiliary tube Ssub3 are turned on. On the one hand, the power supply charges the second bus capacitor Cbus2 through the second main switch tube S2 and the first auxiliary tube Ssub1, and charges the second bus capacitor Cbus2 through the fourth main switch tube S4 and the third auxiliary tube Ssub3, and the first energy storage module LCD Unit discharges and releases energy; on the other hand, the first conversion output circuit performs the freewheeling task through the second main switch tube S2 and the fourth main switch tube S4. In this mode, the potential difference VAB between point A and point B is 0, and the second conversion output circuit performs the freewheeling task through the first auxiliary tube Ssub1 and the third auxiliary tube Ssub3, and the potential difference VCD between point C and point D is 0. In this mode, the voltage of the first main switch tube S1 is equal to Vcbus1, the voltage of the second auxiliary tube Ssub2 is equal to Vcbus2, the voltage of the third main switch tube S3 is equal to Vcbus1, and the voltage of the fourth auxiliary tube Ssub4 is equal to Vcbus2.

[0117] Mode 3: See Figure 4CIn this stage, the first main switch tube S1, the third main switch tube S3, the second auxiliary tube Ssub2, and the third auxiliary tube Ssub3 are turned on. On the one hand, the power supply charges the first bus capacitor Cbus1 through the first main switch tube S1 and the second auxiliary tube Ssub2, and charges the first bus capacitor Cbus1 through the third main switch tube S3 and the second auxiliary tube Ssub2, and the first energy storage module LCD Unit discharges and releases energy; on the other hand, the first conversion output circuit performs the freewheeling task through the first main switch tube S1 and the third main switch tube S3, and the potential difference VAB between point A and point B is 0. The second bus capacitor Cbus2 provides energy to the second output load Rl2 through the second auxiliary tube Ssub2 and the third auxiliary tube Ssub3, and the potential difference VCD between point C and point D is Vcbus2. The voltage of the second main switch tube S2 is equal to Vcbus1, the voltage of the first auxiliary tube Ssub1 is equal to Vcbus2, the voltage of the fourth main switch tube S4 is equal to Vcbus1, and the voltage of the fourth auxiliary tube Ssub4 is equal to Vcbus2.

[0118] Mode 4: See Figure 4D In this stage, the first main switch tube S1, the third main switch tube S3, the second auxiliary tube Ssub2, and the fourth auxiliary tube Ssub4 are turned on. On the one hand, the power supply charges the first bus capacitor Cbus1 through the first main switch tube S1 and the second auxiliary tube Ssub2, and charges the first bus capacitor Cbus1 through the third main switch tube S3 and the fourth auxiliary tube Ssub4, and the first energy storage module LCD Unit discharges and releases energy; on the other hand, the first conversion output circuit performs the freewheeling task through the first main switch tube S1 and the third main switch tube S3, and the potential difference VAB between point A and point B is 0. The second conversion output circuit performs the freewheeling task through the second auxiliary tube Ssub2 and the fourth auxiliary tube Ssub4, and the potential difference VCD between point C and point D is 0. The voltage of the second main switch tube S2 is equal to Vcbus1, the voltage of the first auxiliary tube Ssub1 is equal to Vcbus2, the voltage of the fourth main switch tube S4 is equal to Vcbus1, and the voltage of the third auxiliary tube Ssub3 is equal to Vcbus2.

[0119] Mode 5: See Figure 4EIn this stage, the first main switch tube S1, the third main switch tube S3 and the first auxiliary tube Ssub1, the third auxiliary tube Ssub3 are turned on. On the one hand, the power supply charges the first bus capacitor Cbus1 and the second bus capacitor Cbus2 through the first path through the first main switch tube S1 and the first auxiliary tube Ssub1, and charges the first bus capacitor Cbus1 and the second bus capacitor Cbus2 through the second path through the main switch tube S3 and the fourth auxiliary tube Ssub4, and the first energy storage module LCD Unit discharges and releases energy; on the other hand, the first conversion output circuit performs the freewheeling task through the first main switch tube S1 and the third main switch tube S3, and the potential difference VAB between point A and point B is 0, and the second conversion output circuit performs the freewheeling task through the first auxiliary tube Ssub1 and the third auxiliary tube Ssub3, and the potential difference VCD between point C and point D is 0. The voltage of the second main switch tube S2 is equal to Vcbus1, the voltage of the second auxiliary tube Ssub2 is equal to Vcbus2, the voltage of the fourth main switch tube S4 is equal to Vcbus1, and the voltage of the fourth auxiliary tube Ssub4 is equal to Vcbus2.

[0120] Through the above five different working states, in the positive half cycle of the sine wave, the potential difference VAB between point A and point B is always -Vcbus1 or 0, and the potential difference VCD between point C and point D is always Vcbus2 or 0, so that it is converted into a sinusoidal AC signal after filtering by the first filter module Filto1 and the second filter module Filto2 on the output side, and output to the subsequent load. Since the bus voltage Vbus=Vcbus1+Vcbus2=1 / (1-D)*Vin, and Vcbus1=Vcbus2, when D≤0.5, Vcbus1=Vcbus2≤Vin, that is, the sinusoidal pulse voltages output by the first conversion output circuit and the second conversion output circuit are not higher than the voltage Vin of the power supply, which is a step-down inverter.

[0121] Combining the principles of boost inverter and buck inverter, the dual-output energy conversion device provided in this embodiment has a voltage stress of the main switch tube and the auxiliary tube that is half of the bus voltage Vbus regardless of the working state, that is, the circuit can reduce the device voltage stress, and the output voltages of the two output circuits can be lower than Vcbus1 (or Vcbus2) or higher than Vcbus1 (or Vcbus2), so that the input voltage Vin and the output voltage have the ability to buck and step up.

[0122] In one possible implementation, the main switch tubes S1~S4 and the auxiliary tubes Ssub1~Ssub4 in the dual-output energy conversion device provided in this embodiment are all group III nitride transistors, which can be field effect transistors (FETs), such as high electron mobility transistors (HEMTs), heterojunction field effect transistors (HFETs), POLFETs, JFETs, MESFETs, CAVETs or any other group III nitride transistor structures suitable for power switching applications.

[0123] In some embodiments, the Group III nitride transistor is an enhancement mode (E-mode) device, such as Figure 5A As shown, that is, a normally-off device, so that the threshold voltage is greater than 0V, for example, about 1.5V-2V or greater than 2V, and the enhancement type (E type) device does not contain a reverse body diode when the device is reversely freewheeling, which can reduce the conduction loss of the power supply device when the device is reversely freewheeling. In other possible implementations, the III-group nitride transistor is composed of a high-voltage III-group nitride depletion type (D type) transistor and a low-voltage enhancement type (E type) transistor cascaded, such as Figure 5B The depletion type (D type) device, i.e., the normally-on device, has a threshold voltage less than 0V. The low voltage enhancement type (E type) transistor may be a low voltage Si MOS device. In some embodiments, Figure 5B The group III nitride transistor also includes an external reverse parallel diode for reducing the reverse recovery loss of the device. Figure 5C shown.

[0124] In some embodiments, the group III nitride transistor is a high voltage switching transistor. As the switch tube used in this embodiment, the high voltage switching transistor is a transistor optimized for high voltage switching applications. That is, when the transistor is turned off, it can block high voltages, such as about 300V, or about 600V, or about 1200V or more, and when the transistor is turned on, it has a sufficiently low on-resistance for the above-mentioned applications, that is, when a large amount of current passes through the device, a low conduction loss is achieved.

[0125] In some embodiments, the anti-backflow modules in the dual-output energy conversion device are all group III nitride rectifiers, which can be at least two lateral group III nitride diodes having insulating or semi-insulating parts on opposite sides of the semiconductor body relative to all electrodes, such as Figure 6 The Group III nitride diode shown in . Figure 6The group III nitride diode includes an insulating or semi-insulating portion 61, a semiconductor body 62 including a group III nitride buffer layer 63 (such as GaN) and a group III nitride barrier layer 64 (such as AlGaN), a two-dimensional electron gas (2DEG) channel 65, an anode contact 28 contacting the semiconductor body 62 on the opposite side of the insulating or semi-insulating portion 61 and forming a Schottky contact with the semiconductor material of the semiconductor body 62, and a cathode contact 29 forming an ohmic contact with the 2DEG channel 65. The group III nitride diode may optionally include a conductive or semiconductive portion 66, such as a silicon substrate.

[0126] In a possible implementation, the group III nitride diodes in the group III nitride rectifier device may be connected in a common anode manner, such as Fig. 7A As shown, or common cathode connection, such as Figure 7B shown.

[0127] In some embodiments, the group III nitride rectifier device is composed of two group III nitride diodes in separate packages and connected externally to form a group III nitride rectifier device, wherein the group III nitride diodes in separate packages are as follows: Fig. 8A As shown, Fig. 8A The plan view illustrates the various portions of a package and the electronic devices encapsulated or sealed in the package. Electronic component 90 includes a single Group III nitride diode 22 encapsulated, encapsulated, or sealed in an independent package. The independent package includes a plurality of sealed structural portions, such as a package base 94, and non-structural portions, such as pins 91, 92, and 93. As used herein, a "structural portion" of a package is a portion of the package that forms the basic shape or molding of the package and provides the structural rigidity of the package required to protect the encapsulated device. In most cases, when an electronic component including a package is used in a discrete circuit, the structural portion of the package is mounted directly to the circuit or circuit board. Fig. 8A In an independent package, the package base 94 is formed of a conductive material, that is, the package base 94 is a conductive structural part of the package. A single package includes at least two pins, an anode pin 91 and a cathode pin 93, and optionally includes at least one other pin, such as an open pin 92. Pins 91 to 93 are all formed of conductive materials. When an open pin 92 is included, it can be electrically connected to the package base 94 or electrically insulated from the package base 94, and all other pins are electrically insulated from the package base. As used herein, if two or more contacts or other items are connected by materials that are sufficiently conductive to ensure that the potential at each of the contacts or other items is always the same, that is, approximately the same, under any bias condition, then two or more contacts or other items are referred to as "electrically connected".

[0128] When the III-nitride diode 22 is used in a III-nitride rectifier device, the III-nitride diode 22 is mounted inside a single package and connected as follows, electrical bonding wires 38-39, which may be single or multiple wire bonds, are used to electrically connect multiple parts of the package and the III-nitride diode 22 to each other. The corresponding insulating or semi-insulating substrates of the III-nitride diode 22 are all in contact with the package base 94. The cathode contact 29 of the III-nitride diode 22 is electrically connected to a conductive structural portion of the package, such as the package base 94, or can be electrically connected to the cathode pin 93 of the package, such as through a conductive bonding wire 39. The anode contact 28 of the III-nitride diode 22 is electrically connected to the anode pin 91 of the package, such as through a conductive bonding wire 38.

[0129] In some other embodiments, the III-nitride rectifier device is composed of a dual-tube packaged III-nitride diode, such as Figure 8B As shown, Figure 8B The plan view illustrates the various portions of a package and the electronic devices encapsulated or sealed in the package. The electronic component 90' includes a Group III nitride diode 22 and a Group III nitride diode 22', both encapsulated, encapsulated or sealed in a double-barrel package. The double-barrel package includes a plurality of sealed structural portions, such as a package base 94, and non-structural portions, such as pins 91, 92 and 93. As used herein, a "structural portion" of a package is a portion of the package that forms the basic shape or molding of the package and provides the structural rigidity of the package required to protect the encapsulated device. In most cases, when an electronic component including a package is used in a discrete circuit, the structural portion of the package is mounted directly to the circuit or circuit board. Figure 8B In the double-tube package of , the package base 94 is formed of a conductive material, that is, the package base 94 is a conductive structural part of the package. A single package includes at least three pins, an anode pin 91, an anode pin 93 and a common cathode pin 92. Pins 91 to 93 are all formed of conductive materials. The common cathode pin 92 can be electrically connected to the package base 94 or electrically insulated from the package base 94, and all other pins are electrically insulated from the package base. As used herein, if two or more contacts or other items are connected by materials that are sufficiently conductive to ensure that the potential at each of the contacts or other items is always the same, that is, approximately the same, under any bias condition, then two or more contacts or other items are referred to as "electrically connected".

[0130] When the III-nitride diode is used in the III-nitride rectifier device, the III-nitride diode 22 and the III-nitride diode 22' are mounted inside the double-tube package and connected as follows: the electrical bonding wires 38, 38', 39, which may be single or multiple wire bonds, are used to electrically connect the multiple parts of the package, the III-nitride diode 22, and the III-nitride diode 22' to each other. The corresponding insulating or semi-insulating substrates of the III-nitride diode 22 and the III-nitride diode 22' are in contact with the package base 94. The cathode contact 29 of the III-nitride diode 22 and the cathode contact 29' of the III-nitride diode 22' are electrically connected to the conductive structure part of the package, such as the package base 94, and are also electrically connected to the common cathode pin 92 of the package through the conductive bonding wire 39. Anode contact 28 of group III nitride diode 22 is electrically connected to anode pin 91 of the package, such as by conductive bonding wire 38 , and anode contact 28 ′ of group III nitride diode 22 ′ is electrically connected to anode pin 93 of the package, such as by conductive bonding wire 38 ′.

[0131] See also Figure 10A to Figure 10C , shows the experimental results of a dual-output energy conversion device, where Fig. 10A The waveforms of the first input DC power supply Uin current Iin, the first input DC power supply Uin voltage Vin, the first output voltage Vo1, and the second output voltage Vo1 of the dual-output energy conversion device in boost inverter mode (Vin=200V, Po=1000W). It can be seen that the voltages Vo1 (311.58V) and Vo2 (311.74V) on the first output load Rl1 and the second output load Rl2 are both higher than the first input DC power supply Uin voltage Vin.

[0132] Fig. 10B The waveforms of the first input DC power supply Uin current Iin, the first input DC power supply Uin voltage Vin, the first output voltage Vo1, and the second output voltage Vo1 of the dual-output energy conversion device in step-down inverter mode (Vin=200V, Po=1000W). It can be seen that the voltages Vo1 (87.84V) and Vo2 (87.71V) on the first output load Rl1 and the second output load Rl2 are both lower than the first input DC power supply Uin voltage Vin.

[0133] See also Fig. 10C , Fig. 10C The bus voltage Vbus, the voltage stress of the main switch tubes S1-S4 and the voltage stress of the three-level auxiliary tubes Ssub1-Ssub4 of the dual-output energy conversion device. It can be seen that the voltage stress of all the main switch tubes and auxiliary tubes is half of the bus voltage Vbus, which can reduce the voltage stress of the device.

[0134] This embodiment also provides a power supply device, which includes the dual-output energy conversion device provided in the above embodiment.

[0135] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A dual-output energy conversion device, characterized in that: The dual-output energy conversion device comprises: a first energy storage module, a first combined series bridge arm module, a capacitor energy storage module and a second combined series bridge arm module; The first energy storage module, the first combined series bridge arm module, the capacitor energy storage module, and the second combined series bridge arm module are connected in sequence; the first energy storage module is also electrically connected to the power input end, and the second combined series bridge arm module is also electrically connected to the output end; The first combined series bridge arm module comprises a first main switch tube bridge arm unit and a first auxiliary tube bridge arm unit connected in series; the first auxiliary tube bridge arm unit comprises a first auxiliary tube and a second auxiliary tube, and the first auxiliary tube and the second auxiliary tube are connected in series; The second combined series bridge arm module comprises a second main switch tube bridge arm unit and a second auxiliary tube bridge arm unit connected in series; the second auxiliary tube bridge arm unit comprises a third auxiliary tube and a fourth auxiliary tube, and the third auxiliary tube and the fourth auxiliary tube are connected in series; The first main switch tube bridge arm unit and the second main switch tube bridge arm unit form a first conversion output circuit to output the energy of the first energy storage module and / or the capacitor energy storage module to a subsequent load; The first auxiliary tube bridge arm unit and the second auxiliary tube bridge arm unit form a second conversion output circuit to output the energy of the first energy storage module and / or the capacitor energy storage module to a subsequent load; The first main switch tube bridge arm unit includes a first main switch tube and a second main switch tube, and the first main switch tube and the second main switch tube are connected in series; The second main switch tube bridge arm unit includes a third main switch tube and a fourth main switch tube, and the third main switch tube and the fourth main switch tube are connected in series; The capacitor energy storage module includes a first bus capacitor, a first end of the first bus capacitor is electrically connected to the first main switch tube and the third main switch tube; a second end of the first bus capacitor is electrically connected to the second main switch tube and the fourth main switch tube; The first conversion output circuit includes a first output end and a second output end, the first output end is formed at the midpoint of the first main switch tube bridge arm unit, and the second output end is formed at the midpoint of the second main switch tube bridge arm unit; The first main switch tube, the second main switch tube, the third main switch tube and the fourth main switch tube are used to switch the conduction state according to the driving signal to output the energy of the first energy storage module and the first bus capacitor as an alternating signal to the subsequent load through the first output end and the second output end.

2. The dual-output energy conversion device according to claim 1, characterized in that: The capacitor energy storage module includes a second bus capacitor, the second bus capacitor is connected in series with the first bus capacitor; the first end of the second bus capacitor is electrically connected to the second end of the first bus capacitor; The first end of the second bus capacitor is also electrically connected to the second auxiliary tube and the fourth auxiliary tube; the second end of the second bus capacitor is electrically connected to the first auxiliary tube and the third auxiliary tube; The second conversion output circuit includes a third output terminal and a fourth output terminal, the third output terminal is formed at the midpoint of the first auxiliary tube bridge arm unit, and the fourth output terminal is formed at the midpoint of the second auxiliary tube bridge arm unit; The first auxiliary tube, the second auxiliary tube, the third auxiliary tube and the fourth auxiliary tube are used to switch the conduction state according to the driving signal to output the energy of the first energy storage module and the second bus capacitor to the subsequent load through the third output terminal and the fourth output terminal.

3. The dual-output energy conversion device according to claim 2, characterized in that: The dual-output energy conversion device also includes a first filtering module and a second filtering module; The first filtering module is electrically connected to the output end of the first conversion output circuit, and is used to convert the alternating signal output by the first conversion output circuit into a standard sinusoidal signal; The second filtering module is electrically connected to the output end of the second conversion output circuit, and is used to convert the alternating signal output by the second conversion output circuit into a standard sinusoidal signal.

4. The dual-output energy conversion device according to claim 2, characterized in that: The dual-output energy conversion device includes a first anti-backflow module; The first anti-backflow module is arranged between the first energy storage module and the first conversion output circuit; the first anti-backflow module is used to prevent energy backflow of the first conversion output circuit.

5. The dual-output energy conversion device according to claim 2, characterized in that: The dual-output energy conversion device includes a second anti-backflow module; The second anti-backflow module is arranged between the second conversion output circuit and the negative pole of the power supply, and the second anti-backflow module is used to prevent the energy backflow of the second conversion output circuit.

6. The dual-output energy conversion device according to claim 1, characterized in that: The first energy storage module is arranged between the positive electrode of the power supply and the first conversion output circuit; The first energy storage module includes at least one diode, and the first energy storage module also includes at least one of an inductor and a capacitor.

7. The dual-output energy conversion device according to claim 1, characterized in that: The switch tubes in the first combined series bridge arm module and the second combined series bridge arm module are both group III nitride transistors.

8. A modulation method, characterized in that: The modulation method is applied to the dual-output energy conversion device according to any one of claims 1 to 7, and the modulation method comprises: The first modulation wave input signal is compared with the first carrier input signal and the second carrier input signal to generate a first sinusoidal pulse width signal and a second sinusoidal pulse width signal; The second modulated wave input signal is compared with the first carrier input signal and the second carrier input signal to generate a first fixed pulse width signal and a second fixed pulse width signal; Generate a first zero-crossing detection signal and a second zero-crossing detection signal by comparing the first modulation wave input signal and the second modulation wave input signal with the driving reference ground signal respectively; Generate driving signals Vgs1-Vgs4 of a first conversion output circuit through a first combinational logic module according to the first sinusoidal pulse width signal, the first fixed pulse width signal and the first zero-crossing point detection signal; Generate driving signals Vgsub1-Vgsub4 of a second conversion output circuit through a second combinational logic module according to the second sinusoidal pulse width signal, the second fixed pulse width signal and the second zero-crossing point detection signal; driving the first conversion output circuit according to the driving signals Vgs1-Vgs4 of the first conversion output circuit; driving the second conversion output circuit according to the driving signals Vgsub1-Vgsub4 of the second conversion output circuit; The first carrier input signal and the second carrier input signal have a phase difference of 180 degrees.

9. A power supply device, characterized in that: The power supply equipment includes a dual-output energy conversion device as described in any one of claims 1 to 7.

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