A power conversion system

Abstract

This invention relates to a power conversion system, belonging to the field of power equipment technology, and particularly to a power conversion system. The invention provides a power conversion system comprising a power section, a control board section, and a handheld controller. The control signal input port of the control section is connected to the control signal output port of the handheld controller, the control signal output port of the control section is connected to the control signal input port of the power section, and the control signal output port of the power section is connected to a motor.

Description

Technical Field

[0001] This invention belongs to the field of power equipment technology, and in particular relates to a power conversion system. Background Technology

[0002] With the continuous development of technology and the accelerating pace of globalization, more and more companies are engaging in international project collaborations. Typically, this requires pre-production equipment to undergo functional testing in China. Only after these tests are completed and all equipment indicators are normal can the equipment be integrated into the system. However, due to differences in national power grid conditions between China and other countries, testing equipment selected according to international standards in China presents a challenge: the 380V / 50Hz power supply from the Chinese grid needs to be converted to the corresponding national grid conditions. This is crucial for ensuring that the equipment, selected according to international standards, can undergo functional testing in the most realistic operating environment.

[0003] Currently, there are relatively few power conversion systems for three-phase AC power supplies in China; most are 0-30V DC adjustable power supplies. These cannot meet the power supply needs of factory-level test equipment in multinational projects and have limited applicability. Summary of the Invention

[0004] The present invention addresses the above-mentioned problems by providing a power conversion system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: the present invention includes a power section, a control board section, and a handheld device, characterized in that the control signal input port of the control section is connected to the control signal output port of the handheld device, the control signal output port of the control section is connected to the control signal input port of the power section, and the control signal output port of the power section is connected to the motor.

[0006] As a preferred embodiment, the power section of the present invention includes an FP10R12WT3 module CIB1, the input terminal of CIB1 is connected to L1 to L3, the output terminal of CIB1 is connected to the input terminal of CSM010SY module CS1 and the input terminal of CSM010SY module CS2 respectively, the output terminal of CS1 is connected to VGND1, and the output terminal of CS2 is connected to WGND1.

[0007] The input terminal of the TLP185GB chip O9 is connected to REC, the output terminal of O9 is connected to the base of SS8050 transistor Q1, the collector of Q1 is connected to the control terminal of relay K1, and the controlled terminal of K1 is connected to N1 and N respectively.

[0008] The input terminal of the TLP185GB chip O10 is connected to FAN, the output terminal of O10 is connected to the base of SS8050 transistor Q2, and the collector of Q2 is connected to J3.

[0009] The input terminals of the MC33072 chip Op7A are connected to T1 and T2 respectively, and the output terminal of Op7A is connected to the NTC.

[0010] The first coil on the primary side of T1 is connected to P, SMPS_START, and pin 2 of STW4N150 transistor Q4. Pin 1 of Q4 is connected to pin 6 of UC3844B chip U11. The second coil on the primary side of T1 is connected to pin 3 of MMBF170LT1 transistor Q3 and pin 7 of UC3844B chip U11. Pin 6 of U11 is connected to pin 1 of Q4, pin 3 of Q4 is connected to pin 3 of U11, pin 1 of U11 is connected to the output terminal of PS2501L-1-F3-A chip O4, and the input terminal of O4 is connected to the cathode of TL431ACDBZR transistor VD2.

[0011] The first secondary side of T1 is connected to the MC78M05 chip U12 and VPN; the second secondary side of T1 is connected to the MURS160 transistor D37; the third secondary side of T1 is connected to diodes D32 and D11; the fourth secondary side of T1 is connected to diodes D12 and D8; the fifth secondary side of T1 is connected to diodes D9 and D13; and the fifth secondary side of T1 is connected to diodes D14 and D15.

[0012] Connect the input terminal O1 of the HCNW-3120 chip to ST_G1, and connect the output terminal O1 to G1;

[0013] Connect the O2 input terminal of the HCNW-3120 chip to ST_G3, and connect the O2 output terminal to G3;

[0014] Connect the input terminal O3 of the HCNW-3120 chip to ST_G5, and connect the output terminal O3 to G5;

[0015] Connect the O5 input terminal of the HCNW-3120 chip to ST_G2, and connect the O5 output terminal to GBR;

[0016] Connect the input terminal O6 of the HCNW-3120 chip to ST_G4, and connect the output terminal O6 to G6;

[0017] Connect the input terminal O7 of the HCNW-3120 chip to ST_G6, and connect the output terminal O7 to G4;

[0018] The O8 input terminal of the HCNW-3120 chip is connected to ST_GBR, and the O8 output terminal is connected to G2.

[0019] Secondly, the control board part of the present invention includes an LM317LDR2G chip U8, pin 1 of U8 is connected to +15V, and pin 6 of U8 is connected to +10V.

[0020] Pins 3 to 10 of the SN74LVC4245ADB chip U3 are connected to U_L_O, V_L_O, W_L_O, U_H_O, V_H_O, W_H_O, RELAY_O2, and RELAY_O1 respectively, and pins 14 to 21 of U3 are connected to RELAY, RELAY2, W_H, V_H, U_H, W_L, V_L, and U_L respectively.

[0021] The INPUT pin of the TLV1117LV 33DCYR chip U4 is connected to +5VD, and the Output pin of U4 is connected to VDD.

[0022] The input terminal of the TLP181 chip Op8 is connected to RELAY3, the output terminal of Op8 is connected to the base of SS8050 transistor Q4, the collector of Q4 is connected to the coil terminal of relay K1, and the controlled terminal of K1 is connected to OP4, OL4, and COM4.

[0023] Pins 1, 2, 4, 6, and 7 of the SN75176B_PS_8 chip U6 are connected to RX, TX, RX_EN, TX, A, and B respectively.

[0024] Pins 1, 2, 4, 6, and 7 of the SN75176B_PS_8 chip U5 are connected to RX1, TXRX_EN1, TX1, A1, and B1 respectively.

[0025] Connect the Op6 input terminal of the MC33072 chip to AD_IN, and connect the Op6A output terminal to LT_AI1;

[0026] The input terminal of the TLP181 chip Op7 is connected to RELAY1, the output terminal of Op7 is connected to the base of SS8050 transistor Q3, the collector of Q3 is connected to the control terminal of relay K2, and the controlled terminal of K2 is connected to OP3, OL3, and COM3.

[0027] Pins 1, 2, 5, and 6 of the AT25160B-SSPD chip EP1 are connected to CS_SPI, MISO, MOSI, and SCLK_SPI respectively.

[0028] The input terminal of Op1 of the TLP181 chip is connected to DI1_IN, and the output terminal of Op1 is connected to DI1.

[0029] The input terminal of Op2 of the TLP181 chip is connected to DI2_IN, and the output terminal of Op2 is connected to DI2.

[0030] The input terminal of Op3 of the TLP181 chip is connected to DI3_IN, and the output terminal of Op1 is connected to DI3.

[0031] The input terminal of Op4 of the TLP181 chip is connected to DI4_IN, and the output terminal of Op1 is connected to DI4.

[0032] The input terminal of Op5 of the TLP181 chip is connected to DI0_IN, and the output terminal of Op1 is connected to DI0;

[0033] The input terminal of the TL082 chip U7A is connected to PWM_DAC, and the output terminal of U7A is connected to U_DAC_Out;

[0034] The input terminal of the TL082 chip U7B is connected to U_DAC_Out, and the output terminal of U7B is connected to I_DAC_Out;

[0035] Connect the U2A input terminal of the TL082 chip to PWM_DAC1, and connect the U2A output terminal to U_DAC_Out1;

[0036] Connect the U2B input terminal of the TL082 chip to U_DAC_Out1, and connect the U2B output terminal to I_DAC_Out1;

[0037] The STM32F103R8T6 chip U1 has its 15-17, 20-23, 41-46, 49, 51-53, 8-11, 24, 25, 37, 38, 29, 30, 33-36, 28, and 57-59 pins connected to RELAY3, RELAY1, LT_AI1, CS_SPI, MISO, SCLK_SPI, MOSI, U_H, V_H, W_H, RELAY2, RELAY, SW_DIO, SW_CLK, TX, RX, TXRX_EN, DC_BUS, Tem, I_A, I_B, DI0, DI1, PWM_DAC, PWM_DAC1, DI3, DI4, Shache, V_L, U_L, W_L, DI2, RXTXEN1, TX1, and RX1 pins respectively.

[0038] The base of the MMBT4401L transistor Q1 is connected to the Shache terminal, and the collector of Q1 is connected to the STOP terminal.

[0039] In addition, the handheld device of the present invention includes an AMS117-3.3 chip U1, with pin 3 of U1 connected to VCC and pin 2 of U1 connected to 3V3.

[0040] Pins 1, 2, 4, 6, and 7 of the SN75176B chip U2 are connected to RXD1, 485CON1, TXD1, A1, and B1 respectively.

[0041] Pins 8, 9, 12-14, 1-5, 7, 10, and 11 of the SMG_3+2 module are connected to S11, S21, S31, S41, S51, and DB0-DB6 respectively.

[0042] Pins 20-25, 27, 29, 30, 33-39, 42, 44, 46, 49-59, and 61 of the STM32F103R8T6 chip U3 are respectively connected to KEY_X3, KEY_X2, KEY_X1, KEY_Y3, KEY_Y1, KEY_Y2, TXD1, RXD1, LED1, LED2, S1, S2, S3, S4, S5, LED3, LED4, TMS, TCLK, LED5, LED6, LED7, and DB0-DB6 and DB7.

[0043] The beneficial effects of this invention.

[0044] This invention relates to power conversion systems for various applications requiring power supply voltage and frequency conversion.

[0045] The entire power conversion system is an integrated system. Once the relevant parameters are set and the connections are made correctly, the relevant functional tests can be carried out. This eliminates the need for connecting individual functional units, which can greatly save on-site time and improve work efficiency.

[0046] This power conversion system has high adaptability and compatibility. With sufficient capacity, the AC-AC converter and voltage regulation module in the system can meet the power grid conditions of most countries, meaning that one system can solve multiple situations. Attached Figure Description

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0048] Figures 1-3 This is the circuit schematic diagram of the power section of this invention.

[0049] Figures 4-7 This is the circuit schematic diagram of the power section of this invention.

[0050] Figure 8 This is the circuit schematic diagram of the power section of this invention. Detailed Implementation

[0051] As shown in the figure, the present invention includes a power section, a control board section, and a handheld device. The control signal input port of the control section is connected to the control signal output port of the handheld device, the control signal output port of the control section is connected to the control signal input port of the power section, and the control signal output port of the power section is connected to the motor.

[0052] The power section includes an FP10R12WT3 module CIB1. The input terminal of CIB1 is connected to L1 to L3. The output terminal of CIB1 is connected to the input terminal of CSM010SY module CS1 and the input terminal of CSM010SY module CS2 respectively. The output terminal of CS1 is connected to VGND1 and the output terminal of CS2 is connected to WGND1.

[0053] The input terminal of the TLP185GB chip O9 is connected to REC, the output terminal of O9 is connected to the base of SS8050 transistor Q1, the collector of Q1 is connected to the control terminal of relay K1, and the controlled terminal of K1 is connected to N1 and N respectively.

[0054] The input terminal of the TLP185GB chip O10 is connected to FAN, the output terminal of O10 is connected to the base of SS8050 transistor Q2, and the collector of Q2 is connected to J3.

[0055] The input terminals of the MC33072 chip Op7A are connected to T1 and T2 respectively, and the output terminal of Op7A is connected to the NTC.

[0056] The first coil on the primary side of T1 is connected to P, SMPS_START, and pin 2 of STW4N150 transistor Q4. Pin 1 of Q4 is connected to pin 6 of UC3844B chip U11. The second coil on the primary side of T1 is connected to pin 3 of MMBF170LT1 transistor Q3 and pin 7 of UC3844B chip U11. Pin 6 of U11 is connected to pin 1 of Q4, pin 3 of Q4 is connected to pin 3 of U11, pin 1 of U11 is connected to the output terminal of PS2501L-1-F3-A chip O4, and the input terminal of O4 is connected to the cathode of TL431ACDBZR transistor VD2.

[0057] The first secondary side of T1 is connected to the MC78M05 chip U12 and VPN; the second secondary side of T1 is connected to the MURS160 transistor D37; the third secondary side of T1 is connected to diodes D32 and D11; the fourth secondary side of T1 is connected to diodes D12 and D8; the fifth secondary side of T1 is connected to diodes D9 and D13; and the fifth secondary side of T1 is connected to diodes D14 and D15.

[0058] Connect the input terminal O1 of the HCNW-3120 chip to ST_G1, and connect the output terminal O1 to G1;

[0059] Connect the O2 input terminal of the HCNW-3120 chip to ST_G3, and connect the O2 output terminal to G3;

[0060] Connect the input terminal O3 of the HCNW-3120 chip to ST_G5, and connect the output terminal O3 to G5;

[0061] Connect the O5 input terminal of the HCNW-3120 chip to ST_G2, and connect the O5 output terminal to GBR;

[0062] Connect the input terminal O6 of the HCNW-3120 chip to ST_G4, and connect the output terminal O6 to G6;

[0063] Connect the input terminal O7 of the HCNW-3120 chip to ST_G6, and connect the output terminal O7 to G4;

[0064] The O8 input terminal of the HCNW-3120 chip is connected to ST_GBR, and the O8 output terminal is connected to G2.

[0065] The control board includes an LM317LDR2G chip U8, with pin 1 of U8 connected to +15V and pin 6 of U8 connected to +10V.

[0066] Pins 3 to 10 of the SN74LVC4245ADB chip U3 are connected to U_L_O, V_L_O, W_L_O, U_H_O, V_H_O, W_H_O, RELAY_O2, and RELAY_O1 respectively, and pins 14 to 21 of U3 are connected to RELAY, RELAY2, W_H, V_H, U_H, W_L, V_L, and U_L respectively.

[0067] The INPUT pin of the TLV1117LV 33DCYR chip U4 is connected to +5VD, and the Output pin of U4 is connected to VDD.

[0068] The input terminal of the TLP181 chip Op8 is connected to RELAY3, the output terminal of Op8 is connected to the base of SS8050 transistor Q4, the collector of Q4 is connected to the coil terminal of relay K1, and the controlled terminal of K1 is connected to OP4, OL4, and COM4.

[0069] Pins 1, 2, 4, 6, and 7 of the SN75176B_PS_8 chip U6 are connected to RX, TX, RX_EN, TX, A, and B respectively.

[0070] Pins 1, 2, 4, 6, and 7 of the SN75176B_PS_8 chip U5 are connected to RX1, TXRX_EN1, TX1, A1, and B1 respectively.

[0071] Connect the Op6 input terminal of the MC33072 chip to AD_IN, and connect the Op6A output terminal to LT_AI1;

[0072] The input terminal of the TLP181 chip Op7 is connected to RELAY1, the output terminal of Op7 is connected to the base of SS8050 transistor Q3, the collector of Q3 is connected to the control terminal of relay K2, and the controlled terminal of K2 is connected to OP3, OL3, and COM3.

[0073] Pins 1, 2, 5, and 6 of the AT25160B-SSPD chip EP1 are connected to CS_SPI, MISO, MOSI, and SCLK_SPI respectively.

[0074] The input terminal of Op1 of the TLP181 chip is connected to DI1_IN, and the output terminal of Op1 is connected to DI1.

[0075] The input terminal of Op2 of the TLP181 chip is connected to DI2_IN, and the output terminal of Op2 is connected to DI2.

[0076] The input terminal of Op3 of the TLP181 chip is connected to DI3_IN, and the output terminal of Op1 is connected to DI3.

[0077] The input terminal of Op4 of the TLP181 chip is connected to DI4_IN, and the output terminal of Op1 is connected to DI4.

[0078] The input terminal of Op5 of the TLP181 chip is connected to DI0_IN, and the output terminal of Op1 is connected to DI0;

[0079] The input terminal of the TL082 chip U7A is connected to PWM_DAC, and the output terminal of U7A is connected to U_DAC_Out;

[0080] The input terminal of the TL082 chip U7B is connected to U_DAC_Out, and the output terminal of U7B is connected to I_DAC_Out;

[0081] Connect the U2A input terminal of the TL082 chip to PWM_DAC1, and connect the U2A output terminal to U_DAC_Out1;

[0082] Connect the U2B input terminal of the TL082 chip to U_DAC_Out1, and connect the U2B output terminal to I_DAC_Out1;

[0083] The STM32F103R8T6 chip U1 has its 15-17, 20-23, 41-46, 49, 51-53, 8-11, 24, 25, 37, 38, 29, 30, 33-36, 28, and 57-59 pins connected to RELAY3, RELAY1, LT_AI1, CS_SPI, MISO, SCLK_SPI, MOSI, U_H, V_H, W_H, RELAY2, RELAY, SW_DIO, SW_CLK, TX, RX, TXRX_EN, DC_BUS, Tem, I_A, I_B, DI0, DI1, PWM_DAC, PWM_DAC1, DI3, DI4, Shache, V_L, U_L, W_L, DI2, RXTXEN1, TX1, and RX1 pins respectively.

[0084] The base of the MMBT4401L transistor Q1 is connected to the Shache terminal, and the collector of Q1 is connected to the STOP terminal.

[0085] The handheld device includes an AMS117-3.3 chip U1, with pin 3 of U1 connected to VCC and pin 2 of U1 connected to 3V3.

[0086] Pins 1, 2, 4, 6, and 7 of the SN75176B chip U2 are connected to RXD1, 485CON1, TXD1, A1, and B1 respectively.

[0087] Pins 8, 9, 12-14, 1-5, 7, 10, and 11 of the SMG_3+2 module are connected to S11, S21, S31, S41, S51, and DB0-DB6 respectively.

[0088] Pins 20-25, 27, 29, 30, 33-39, 42, 44, 46, 49-59, and 61 of the STM32F103R8T6 chip U3 are respectively connected to KEY_X3, KEY_X2, KEY_X1, KEY_Y3, KEY_Y1, KEY_Y2, TXD1, RXD1, LED1, LED2, S1, S2, S3, S4, S5, LED3, LED4, TMS, TCLK, LED5, LED6, LED7, and DB0-DB6 and DB7.

[0089] The handheld controller CON8 is connected to the control unit RJ1, the power unit J1 is connected to the control unit J5, the control board J3 is connected to the user, and the power unit J2 is connected to the motor.

[0090] In the power section, CIB1 performs rectification, voltage regulation, and inversion.

[0091] The control section acquires current (CS1 and CS2 complete the current acquisition), and sends ST_G1-G6 and ST_GBR signals through U1. After being converted by the circuits O1 to O8, the G1-G6 and GBR signals are output to control the inverter section of the power section CIB1.

[0092] Based on the input status of the key section of the handheld controller's matrix keyboard, the controller sends commands to the control section via the SN75176B chip U2's 485 communication.

[0093] This invention can perform frequency conversion and voltage regulation.

[0094] This invention is an AC-AC frequency conversion system. By setting the AC-AC frequency conversion system of this invention, the required output frequency and switching frequency and other parameters can be adjusted to meet the requirements.

[0095] This invention can be used with any electrical equipment that requires power from outside the State Grid. By connecting this power conversion system to the input of the equipment, the State Grid 380V / 50HZ power can be converted to provide power to equipment with different power requirements.

[0096] It is understood that the above specific description of the present invention is only for illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of the present invention.

Claims

1. A power conversion system, comprising a power section, a control board section, and a handheld device, characterized in that... The control signal input port of the control section is connected to the control signal output port of the handheld controller, the control signal output port of the control section is connected to the control signal input port of the power section, and the control signal output port of the power section is connected to the motor. The power section includes an FP10R12WT3 module CIB1. The input terminal of CIB1 is connected to L1 to L3. The output terminal of CIB1 is connected to the input terminal of CSM010SY module CS1 and the input terminal of CSM010SY module CS2 respectively. The output terminal of CS1 is connected to VGND1 and the output terminal of CS2 is connected to WGND1. The input terminal of the TLP185GB chip O9 is connected to REC, the output terminal of O9 is connected to the base of SS8050 transistor Q1, the collector of Q1 is connected to the control terminal of relay K1, and the controlled terminal of K1 is connected to N1 and N respectively. The input terminal of the TLP185GB chip O10 is connected to FAN, the output terminal of O10 is connected to the base of SS8050 transistor Q2, and the collector of Q2 is connected to J3. The input terminals of the MC33072 chip Op7A are connected to T1 and T2 respectively, and the output terminal of Op7A is connected to the NTC. The first coil on the primary side of T1 is connected to P, SMPS_START, and pin 2 of STW4N150 transistor Q4. Pin 1 of Q4 is connected to pin 6 of UC3844B chip U11. The second coil on the primary side of T1 is connected to pin 3 of MMBF170LT1 transistor Q3 and pin 7 of UC3844B chip U11. Pin 6 of U11 is connected to pin 1 of Q4, pin 3 of Q4 is connected to pin 3 of U11, pin 1 of U11 is connected to the output terminal of PS2501L-1-F3-A chip O4, and the input terminal of O4 is connected to the cathode of TL431ACDBZR transistor VD2. The first secondary side of T1 is connected to the MC78M05 chip U12 and VPN; the second secondary side of T1 is connected to the MURS160 transistor D37; the third secondary side of T1 is connected to diodes D32 and D11; the fourth secondary side of T1 is connected to diodes D12 and D8; the fifth secondary side of T1 is connected to diodes D9 and D13; and the fifth secondary side of T1 is connected to diodes D14 and D15. Connect the input terminal O1 of the HCNW-3120 chip to ST_G1, and connect the output terminal O1 to G1; Connect the O2 input terminal of the HCNW-3120 chip to ST_G3, and connect the O2 output terminal to G3; Connect the input terminal O3 of the HCNW-3120 chip to ST_G5, and connect the output terminal O3 to G5; Connect the O5 input terminal of the HCNW-3120 chip to ST_G2, and connect the O5 output terminal to GBR; Connect the input terminal O6 of the HCNW-3120 chip to ST_G4, and connect the output terminal O6 to G6; Connect the input terminal O7 of the HCNW-3120 chip to ST_G6, and connect the output terminal O7 to G4; The O8 input terminal of the HCNW-3120 chip is connected to ST_GBR, and the O8 output terminal is connected to G2.

2. The power conversion system according to claim 1, characterized in that... The control board includes an LM317LDR2G chip U8, with pin 1 of U8 connected to +15V and pin 6 of U8 connected to +10V. Pins 3 to 10 of the SN74LVC4245ADB chip U3 are connected to U_L_O, V_L_O, W_L_O, U_H_O, V_H_O, W_H_O, RELAY_O2, and RELAY_O1 respectively, and pins 14 to 21 of U3 are connected to RELAY, RELAY2, W_H, V_H, U_H, W_L, V_L, and U_L respectively. The INPUT pin of the TLV1117LV 33DCYR chip U4 is connected to +5VD, and the Output pin of U4 is connected to VDD. The input terminal of the TLP181 chip Op8 is connected to RELAY3, the output terminal of Op8 is connected to the base of SS8050 transistor Q4, the collector of Q4 is connected to the coil terminal of relay K1, and the controlled terminal of K1 is connected to OP4, OL4, and COM4. Pins 1, 2, 4, 6, and 7 of the SN75176B_PS_8 chip U6 are connected to RX, TX, RX_EN, TX, A, and B respectively. Pins 1, 2, 4, 6, and 7 of the SN75176B_PS_8 chip U5 are connected to RX1, TXRX_EN1, TX1, A1, and B1 respectively. Connect the Op6 input terminal of the MC33072 chip to AD_IN, and connect the Op6A output terminal to LT_AI1; The input terminal of the TLP181 chip Op7 is connected to RELAY1, the output terminal of Op7 is connected to the base of SS8050 transistor Q3, the collector of Q3 is connected to the control terminal of relay K2, and the controlled terminal of K2 is connected to OP3, OL3, and COM3. Pins 1, 2, 5, and 6 of the AT25160B-SSPD chip EP1 are connected to CS_SPI, MISO, MOSI, and SCLK_SPI respectively. The input terminal of Op1 of the TLP181 chip is connected to DI1_IN, and the output terminal of Op1 is connected to DI1. The input terminal of Op2 of the TLP181 chip is connected to DI2_IN, and the output terminal of Op2 is connected to DI2. The input terminal of Op3 of the TLP181 chip is connected to DI3_IN, and the output terminal of Op1 is connected to DI3. The input terminal of Op4 of the TLP181 chip is connected to DI4_IN, and the output terminal of Op1 is connected to DI4. The input terminal of Op5 of the TLP181 chip is connected to DI0_IN, and the output terminal of Op1 is connected to DI0; The input terminal of the TL082 chip U7A is connected to PWM_DAC, and the output terminal of U7A is connected to U_DAC_Out; The input terminal of the TL082 chip U7B is connected to U_DAC_Out, and the output terminal of U7B is connected to I_DAC_Out. Connect the U2A input terminal of the TL082 chip to PWM_DAC1, and connect the U2A output terminal to U_DAC_Out1; Connect the U2B input terminal of the TL082 chip to U_DAC_Out1, and connect the U2B output terminal to I_DAC_Out1; The STM32F103R8T6 chip U1 has its 15-17, 20-23, 41-46, 49, 51-53, 8-11, 24, 25, 37, 38, 29, 30, 33-36, 28, and 57-59 pins connected to RELAY3, RELAY1, LT_AI1, CS_SPI, SCLK_SPI, MISO, MOSI, U_H, V_H, W_H, RELAY2, RELAY, SW_DIO, SW_CLK, TX, RX, TXRX_EN, DC_BUS, Tem, I_B, I_A, DI0, DI1, PWM_DAC, PWM_DAC1, DI3, DI4, Shache, U_L, V_L, W_L, DI2, RXTXEN1, TX1, and RX1 pins respectively. The base of the MMBT4401L transistor Q1 is connected to the Shache terminal, and the collector of Q1 is connected to the STOP terminal.

3. The power conversion system according to claim 1, characterized in that... The handheld device includes an AMS117-3.3 chip U1, with pin 3 of U1 connected to VCC and pin 2 of U1 connected to 3V3. Pins 1, 2, 4, 6, and 7 of the SN75176B chip U2 are connected to RXD1, 485CON1, TXD1, A1, and B1 respectively. Pins 8, 9, 12-14, 1-5, 7, 10, and 11 of the SMG_3+2 module are respectively connected to S11, S21, S31, S41, S51, DB4, DB3, DB7, DB2, DB6, DB1, DB5, and DB0. Pins 20-25, 27, 29, 30, 33-39, 42, 44, 46, 49-59, and 61 of the STM32F103R8T6 chip U3 are respectively connected to KEY_X3, KEY_X2, KEY_X1, KEY_Y3, KEY_Y1, KEY_Y2, TXD1, RXD1, LED1, LED2, S1, S2, S3, S4, S5, LED3, LED4, TMS, TCLK, LED5, LED6, LED7, and DB0-DB6 and DB7.

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