A switched reluctance motor drive integrated power converter suitable for small and medium-sized logistics vehicles

Abstract

This utility model discloses an integrated power converter for switching reluctance motors used in small and medium-sized logistics vehicles, comprising a microcontroller circuit, a drive circuit, a detection circuit, a step-down module circuit, and an integrated drive conversion circuit. This integrated power converter for switching reluctance motors used in small and medium-sized logistics vehicles achieves a highly integrated, multi-functional power conversion system by organically integrating the existing motor drive system with the charging system. In the 220V AC rectifier circuit of the charging circuit, two phases of diodes and MOSFETs from the drive circuit are reused, and the motor windings in those two phases are reused as inductors. The freewheeling circuit also reuses the freewheeling circuit of the drive topology. Combined with reused filter capacitors and signal control of the MOSFETs, PFC rectification and boosting functions are achieved, enabling the output of stable DC power. This function is implemented by the integrated drive conversion circuit.

Description

Technical Field

[0001] This utility model relates to the field of power electronics and electric drive technology, specifically to a switched reluctance motor drive and charging integrated power converter suitable for small and medium-sized logistics vehicles. Background Technology

[0002] The rise of e-commerce has spurred the rapid development of the express delivery industry, with small- and medium-power electric logistics vehicles being widely used for short-distance freight transportation. Currently, the motor drive technology and battery charging technology for electric logistics vehicles are relatively mature, and due to constraints such as cost, weight, and size, significant technological revolutions are unlikely in the short term. In this context, optimizing and reusing the motor drive circuit and battery charging circuit will undoubtedly improve the integration of the overall power conversion circuitry of electric vehicles, reduce size, lower costs, and achieve energy conservation and emission reduction. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an integrated power converter for switching reluctance motor drive and charging suitable for small and medium-sized logistics vehicles, thereby solving the problems of resource waste, low power density, high cost, and large space requirements caused by the independent operation of motor drive and battery charging in existing electric vehicles.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a switched reluctance motor drive-charging integrated power converter suitable for small and medium-sized logistics vehicles, including a microcontroller circuit, a drive circuit connected to the microcontroller circuit, a detection circuit connected to the microcontroller circuit, a step-down module circuit connected to the microcontroller circuit; and an integrated drive-conversion circuit connected to both the drive circuit and the detection circuit.

[0005] The microcontroller circuit is used to control the drive circuit, and the detection circuit detects the current and voltage of important circuits in real time. The drive circuit is used to respond to the output signal of the microcontroller circuit and control the integrated drive conversion circuit through the switching MOSFET. The detection circuit is used to collect the current and voltage of the main circuit and transmit the information to the microcontroller circuit. The step-down module circuit is used to reduce the input power supply voltage to the operating voltage required by each circuit. The integrated drive conversion circuit is used to control the motor drive and serves as the main circuit for drive charging conversion.

[0006] This utility model also has the following technical features: the microcontroller circuit adopts a microcontroller U79, pins 31, 32, 33, 34, 45, 48, 67, and 68 of the microcontroller U79 are grounded, pins 27, 29, 30, and 36 of the microcontroller U79 are connected to the 3.3V output terminal of the step-down module circuit, pins 63 and 65 of the microcontroller U79 are connected to the 5V output terminal of the step-down module circuit, pins 1-4, 60, and 61 of the microcontroller U79 are connected to the drive circuit, and pins 7, 18, 41, 42, 44, 46, 51, 56, and 57 of the microcontroller U79 are connected to the detection circuit.

[0007] The step-down circuit includes an input voltage step-down circuit, a 15V step-down circuit, and a 5V step-down circuit. The input voltage step-down circuit includes a step-down chip U134. Pin 8 of the step-down chip U134 is connected to the voltage input terminal VCC via capacitor C93. Pin 6 of the step-down chip U134 is connected to capacitor C93 via resistor R283. Pin 3 of the step-down chip U134 is grounded via resistor R282. Pin 4 of the step-down chip U134 is grounded.

[0008] Pin 7 of the step-down chip U134 is grounded via capacitor C91. The non-grounded end of capacitor C91 is connected to the positive terminal of diode D107. The negative terminal of diode D107 is connected to pin 1 of the step-down chip U134. Pin 2 of the step-down chip U134 is connected to pin 1 of the step-down chip U134 via capacitor C90. Pin 1 of the step-down chip U134 is also connected to one end of inductor U135. The other end of inductor U135 is connected to one end of resistor R284 and resistor R286 respectively. The other end of resistor R284 is connected to pin 5 of the step-down chip U134. The other end of resistor R286 is grounded via capacitor C92. Pin 5 of the step-down chip U134 is grounded via resistor R285.

[0009] One end of the inductor U135 connected to the resistor R284 is also connected to a 15V output terminal, which is connected to a 15V step-down circuit. The 15V step-down circuit includes a step-down chip U138, and pin 1 of the step-down chip U138 is connected to the 15V output terminal.

[0010] Pin 1 of the step-down chip U138 is also grounded via capacitor C94; pin 1 of the step-down chip U138 is connected to the negative terminal of diode D108, the positive terminal of diode D108 is grounded via capacitor C95, the positive terminal of diode D108 is also connected to pin 3 of the step-down chip U138, and pins 2 and 4 of the step-down chip U138 are grounded.

[0011] Pin 3 of the step-down chip U138 is connected to the 5V output terminal, which is connected to the 5V step-down circuit. The 5V step-down circuit includes a step-down chip U140. Pin 3 of the step-down chip U140 is connected to the 5V output terminal. Pin 3 of the step-down chip U140 is also grounded through capacitor C96. Pin 2 of the step-down chip U140 is grounded through capacitor C97. Pin 2 of the step-down chip U140 is also connected to the 3.3V output terminal. Pin 1 of the step-down chip U140 is grounded.

[0012] The 5V output terminal is connected to pins 63 and 65 of the microcontroller U79, and the 3.3V output terminal is connected to pins 27, 29, 30 and 36 of the microcontroller U79.

[0013] The detection circuit includes a drive current detection circuit, a zero-crossing and overcurrent detection circuit, an input voltage acquisition circuit, and a phase voltage acquisition circuit. The drive current detection circuit includes a detection chip U141. Pin 10 of the detection chip U141 is connected to one end of a resistor R297. The other end of the resistor R297 is connected to one end of a capacitor C105, a capacitor C104, and a resistor R298, respectively. The other ends of capacitors C105, C104, and R298 are connected to an integrated drive conversion circuit. The other end of the integrated drive conversion circuit connected to the resistor R298 is grounded through a resistor R299.

[0014] Pin 9 of the detection chip U141 is grounded via resistor R296. The grounding terminal of resistor R296 is also connected to the positive terminal of diode D114. The negative terminal of diode D114 is connected to the positive terminal of diode D115. The negative terminal of diode D115 is connected to the 3.3V output terminal.

[0015] Pin 8 of the detection chip U141 is connected to the non-grounded terminals of resistors R295 and R296. Pins 8 and 11 of the detection chip U141 are grounded. Pin 8 of the detection chip U141 is also connected to pin 42 of the microcontroller U79.

[0016] Pin 1 of the detection chip U141 is connected to pin 44 of the microcontroller U79. Pin 1 of the detection chip U141 is also grounded through resistors R287 and R288. The non-grounded end of resistor R288 is connected to the 3.3V output terminal.

[0017] The non-grounded terminal of resistor R288 is also connected to the positive terminal of diode D110, the negative terminal of diode D110 is connected to the positive terminal of diode D111, and the negative terminal of diode D111 is connected to the 3.3V output terminal.

[0018] Pin 1 of the detection chip U141 is also connected to the integrated drive conversion circuit via capacitors C100 and C99, and pin 1 of the detection chip U141 is also connected to the positive terminal of diode D111.

[0019] Pin 2 of the detection chip U141 is connected to one end of resistors R288 and R287. Pin 3 of the detection chip U141 is grounded through resistors R289 and R290. The grounded end of resistor R290 is also connected to resistor R300. The other end of resistor R300 is connected to the integrated drive conversion circuit. The non-grounded end of resistor R288 is connected to the 3.3V output terminal.

[0020] One end of resistors R289 and R290 is connected to capacitor C98, and the other end of capacitor C98 is connected to the integrated drive conversion circuit.

[0021] Pin 5 of the detection chip U141 is grounded via resistors R293, R294, and R301. Pin 7 of the detection chip U141 is grounded via resistors R291 and R292. The grounding terminals of resistors R292 and R301 are also connected to the 3.3V output terminal. Pin 6 of the detection chip U141 is connected to resistor R292. Pin 7 of the detection chip U141 is also connected to the non-grounded terminal of resistor R301 via capacitors C103 and C102. Resistor R2... A capacitor C101 is connected in parallel across terminals 94. The ground section of resistor R292 is connected to the anode of diode D112. The cathode of diode D112 is connected to the anode of diode D113. The cathode of diode D113 is connected to the 3.3V output terminal. Pin 7 of detection chip U141 is also connected to the anode of diode D113. Pin 7 of detection chip U141 is also connected to pin 41 of microcontroller U79. One end of capacitor C102 connected to resistor R301 is also connected to the integrated drive conversion circuit.

[0022] Pin 11 of the detection chip U141 is grounded, and pin 4 of the detection chip U141 is connected to the 5V output terminal. The zero-crossing and overcurrent detection circuit includes the operational amplifier chip U93. Pin 1 of the operational amplifier chip U93 is connected to the 3.3V output terminal through resistor R263, and pin 1 of the operational amplifier chip U93 is grounded through capacitor C95. Pin 1 of the operational amplifier chip U93 is also connected to pin 18 of the microcontroller U79. Pin 3 of the operational amplifier chip U93 is connected to pin 46 of the microcontroller U79, and pins 2 and 4 of the operational amplifier chip U93 are grounded.

[0023] Pin 5 of op-amp chip U93 is connected to the 5V output terminal. Pin 7 of op-amp chip U93 is connected to pin 7 of microcontroller U79. Pin 7 of op-amp chip U93 is connected to pin 5 of op-amp chip U93 via resistor R265. Pin 5 of op-amp chip U93 is also connected to the 3.3V output terminal via resistor R264. Pin 6 of op-amp chip U93 is also connected to pin 41 of microcontroller U79.

[0024] The input voltage acquisition circuit includes an operational amplifier chip U90. Pin 3 of the operational amplifier chip U90 is connected to the input voltage through resistors R260, R258, and R259. The connection between resistors R260 and R258 is also connected to the positive terminal of diode D104. The negative terminal of diode D104 is connected to the 3.3V output terminal. The connection between resistors R260 and R258 is also connected to one end of capacitor C84 and one end of resistor R261, respectively. The other ends of capacitor C84 and resistor R261 are grounded.

[0025] A resistor R262 is connected between pin 2 and pin 1 of op-amp chip U90. Pin 1 of op-amp chip U90 is connected to pin 51 of microcontroller U79. Pin 1 of op-amp chip U90 is also grounded through bidirectional diode U91. Pin 4 of op-amp chip U90 is connected to one end of capacitor C83 and one end of capacitor C82. The other ends of capacitors C83 and C82 are grounded. Pin 4 of op-amp chip U90 is also connected to the 3.3V output terminal. Pin 8 of op-amp chip U90 is grounded.

[0026] The phase voltage acquisition circuit includes a first phase voltage acquisition circuit, a second phase voltage acquisition circuit, and a third phase voltage acquisition circuit. The first phase voltage acquisition circuit includes an operational amplifier chip U88. Pin 1 of the operational amplifier chip U88 is connected to pin 46 of the microcontroller U79 via a resistor R257. One end of the resistor R257 connected to the microcontroller U79 is also connected to one end of a bidirectional diode U89 and one end of a capacitor C81. The other ends of the bidirectional diode U89 and the capacitor C81 are grounded.

[0027] Pin 1 of op-amp chip U88 is grounded via resistors R256 and R255. Pin 2 of op-amp chip U88 is grounded via resistor R255. Pin 3 of op-amp chip U88 is connected to the integrated driver conversion circuit via resistor R253. Pin 4 of op-amp chip U88 is connected to the integrated driver conversion circuit via resistor R253. Pin 4 of op-amp chip U88 is grounded. Pin 8 of op-amp chip U88 is connected to the 5V output terminal.

[0028] The structure and connection method of the second-phase voltage acquisition circuit and the third-phase voltage acquisition circuit are the same as those of the first-phase voltage acquisition circuit.

[0029] The drive circuit includes an upper-level drive control circuit, an upper-level drive circuit, and a lower-level drive circuit. The upper-level drive control circuit includes a logic chip U44. Pins 1, 4, and 10 of the logic chip U44 are connected. Pin 2 of the logic chip U44 is connected to pin 2 of the microcontroller U79. Pin 5 of the logic chip U44 is connected to pin 3 of the microcontroller U79. Pin 9 of the logic chip U44 is connected to pin 4 of the microcontroller U79. Pins 3, 6, and 8 of the logic chip U44 are connected to the upper-level drive circuit. The circuit consists of a logic chip U44, with pin 14 connected to the 5V output and pin 7 grounded. The upper-level driver circuit includes a first upper-level driver circuit, a second upper-level driver circuit, and a third upper-level driver circuit. The third upper-level driver circuit includes a transistor Q46, with its emitter grounded and its base connected to one end of resistor R148 and one end of resistor R149. The other end of resistor R148 is grounded, and the other end of resistor R149 is connected to pin 8 of the logic chip U44.

[0030] The emitter of transistor Q46 is also connected to the negative terminal of electrolytic capacitor U58. The positive terminal of electrolytic capacitor U58 is connected to the positive terminal of diode D74 and directly connected to the input voltage. The negative terminal of diode D74 is connected to the emitter of transistor Q45. The collector of transistor Q46 is connected to one end of resistor R146 and one end of resistor R147. The other ends of resistor R146 and R147 are connected to the base of transistor Q45. The emitter of transistor Q45 is connected to one end of resistor R145 and the positive terminal of electrolytic capacitor U57. The other end of resistor R145 is connected to the base of transistor Q45. The negative terminal of electrolytic capacitor U57 is connected to one end of resistor R144 and the collector of transistor Q44. The other end of resistor R144 is connected to the base of transistor Q44 and the collector of transistor Q45.

[0031] The collector of transistor Q44 is connected to the base of transistor Q44 via resistors R142 and R143, the negative terminal of diode D75, and the positive terminal of diode D75. The positive terminal of diode D75 is also connected to the collector of transistor Q45.

[0032] The collector of transistor Q44 is also connected to the positive terminal of diode D76 and one end of capacitor C47, respectively. The negative terminal of diode D76 is connected to the emitter of transistor Q44 and the negative terminal of diode D75, respectively. The other end of capacitor C47 is connected to the negative terminal of diode D76.

[0033] The third upper-level drive circuit also includes parallel resistors R150, R151, R152 and R153. One end of the parallel resistors R150, R151, R152 and R153 is connected to the emitter of transistor Q44, and the other end is connected to the integrated drive conversion circuit.

[0034] The structure and connection method of the first and second upper-level drive circuits are the same as those of the third upper-level drive circuit; the lower-level drive circuits include the first lower-level drive circuit, the second lower-level drive circuit, and the third lower-level drive circuit.

[0035] The third-stage driver circuit includes transistor Q53. The base of transistor Q53 is connected to the 3.3V output terminal. The collector of transistor Q53 is connected to one end of resistor R179 and the base of transistor Q54. The other end of resistor R179 is connected to the emitter of transistor Q54.

[0036] The emitter of transistor Q53 is connected to resistors R177 and R178, which are connected to the base of transistor Q55. The base of transistor Q53 is also connected to one end of resistor R176. The other end of resistor R176 is connected to one end of resistor R178, which is connected to one end of resistor R177.

[0037] Resistor R177 is connected to one end of resistor R178, which is also connected to pin 1 of microcontroller U79. The collector of transistor Q54 is connected to one end of resistor R180, the other end of resistor R180 is connected to the collector of transistor Q55, the collector of transistor Q55 is also connected to one end of resistor R181, the other end of resistor R181 is connected to the anode of diode D81, the cathode of diode D81 is connected to the collector of transistor Q55, and the emitter of transistor Q55 is also connected to the anode of diode D81.

[0038] The collector of transistor Q55 is also connected to one end of capacitor C50, resistors R182, R183, R184 and R185. The other end of capacitor C50 is grounded, and the other ends of resistors R182, R183, R184 and R185 are connected to the integrated drive conversion circuit.

[0039] The integrated drive conversion circuit includes MOSFETs U149, U150, U151, and U152. The drains of MOSFETs U149, U150, U151, and U152 are connected to the VCC terminal. The gates of MOSFETs U149, U150, U151, and U152 are connected to the first upper-level drive circuit. The sources of MOSFETs U149, U150, U151, and U152 are connected to the resistor R253 of the first phase voltage acquisition circuit.

[0040] The integrated drive conversion circuit includes MOSFETs U157, U158, U159, and U160. The drains of MOSFETs U157, U158, U159, and U160 are connected to the VCC terminal. The gates of MOSFETs U157, U158, U159, and U160 are connected to the second upper-level drive circuit. The sources of MOSFETs U157, U158, U159, and U160 are connected to the second phase voltage acquisition circuit.

[0041] The integrated drive conversion circuit includes MOSFETs U165, U166, U167, and U168. The drains of MOSFETs U165, U166, U167, and U168 are connected to the VCC terminal. The gates of MOSFETs U165, U166, U167, and U168 are connected to the third upper-level drive circuit. The sources of MOSFETs U165, U166, U167, and U168 are connected to the third phase voltage acquisition circuit.

[0042] The integrated drive conversion circuit includes MOSFETs U153, U154, U155, and U156. The drains of MOSFETs U153, U154, U155, and U156 are connected and then connected to resistor R253 of the first phase voltage acquisition circuit via inductor L3. The gates of MOSFETs U153, U154, U155, and U156 are connected and then connected to the first lower-level drive circuit. The sources of MOSFETs U153, U154, U155, and U156 are connected and then connected to the non-grounded terminal of resistor R300.

[0043] The integrated drive conversion circuit includes MOSFETs U161, U162, U163, and U164. The drains of MOSFETs U161, U162, U163, and U164 are connected and then connected to the second phase voltage acquisition circuit via inductor L1. The gates of MOSFETs U161, U162, U163, and U164 are connected and then connected to the second lower-level drive circuit. The sources of MOSFETs U161, U162, U163, and U164 are connected and then connected to the non-grounded terminal of resistor R301.

[0044] The integrated drive conversion circuit includes MOSFETs U175, U176, U177, and U178. The drains of MOSFETs U175, U176, U177, and U178 are connected and then connected to the third phase voltage acquisition circuit via inductor L2. The gates of MOSFETs U175, U176, U177, and U178 are connected and then connected to resistor R185 of the third lower-level drive circuit. The sources of MOSFETs U175, U176, U177, and U178 are connected and then connected to the non-grounded terminal of resistor R299.

[0045] The integrated drive conversion circuit also includes diodes D121 and D120 connected in parallel. The anodes of diodes D121 and D120 are connected to the drain of MOSFET U153, and the cathodes of diodes D121 and D120 are connected to the VCC terminal.

[0046] The integrated drive conversion circuit also includes electrolytic capacitors U180 and U181 connected in parallel. The positive terminals of electrolytic capacitors U180 and U181 are connected to the VCC terminal, and the negative terminals of electrolytic capacitors U180 and U181 are grounded.

[0047] The integrated drive conversion circuit also includes diodes D118 and D116 connected in parallel. The anodes of diodes D118 and D116 are connected to the drain of MOSFET U161, and the cathodes of diodes D118 and D116 are connected to the VCC terminal.

[0048] The integrated drive conversion circuit also includes electrolytic capacitors U183 and U182 connected in parallel. The positive terminals of electrolytic capacitors U183 and U182 are connected to the VCC terminal, and the negative terminals of electrolytic capacitors U183 and U182 are grounded.

[0049] The integrated drive conversion circuit also includes diodes D119 and D117 connected in parallel. The anodes of diodes D119 and D117 are connected to the drain of MOSFET U175, and the cathodes of diodes D119 and D117 are connected to the VCC terminal.

[0050] The integrated drive conversion circuit also includes electrolytic capacitors U184 and U185 connected in parallel. The positive terminals of electrolytic capacitors U184 and U185 are connected to the VCC terminal, and the negative terminals of electrolytic capacitors U184 and U185 are grounded.

[0051] The integrated drive conversion circuit also includes MOSFETs U169 and U170. The source, drain, and gate of MOSFETs U169 and U170 are all grounded. The drain of MOSFETs U169 and U170 is also connected to resistor R253 of the first phase voltage acquisition circuit.

[0052] The integrated drive conversion circuit also includes MOSFETs U171 and U172. The source, drain, and gate of MOSFETs U171 and U172 are all grounded. The drain of MOSFETs U171 and U172 is also connected to the second phase voltage acquisition circuit.

[0053] The integrated drive conversion circuit also includes MOSFETs U173 and U174. The source, drain, and gate of MOSFETs U173 and U174 are all grounded. The drain of MOSFETs U173 and U174 is also connected to the third phase voltage acquisition circuit.

[0054] The integrated drive conversion circuit also includes an electrolytic capacitor U179, whose positive terminal is connected to the VCC terminal and whose negative terminal is grounded.

[0055] It also includes the housing, in which the switched reluctance motor drive integrated power converter suitable for small and medium-sized logistics vehicles is installed.

[0056] Compared with the prior art, this utility model has the following technical effects: (I) The switched reluctance motor drive-charging integrated power converter for small and medium-sized logistics vehicles provided by this utility model achieves a highly integrated multi-functional power conversion system by organically integrating the existing motor drive system with the charging system. In the 220V AC rectifier circuit section of the charging circuit, two phases of diodes and MOSFETs from the drive circuit are reused, and the motor windings in those two phases are reused as inductors in the circuit. The freewheeling circuit also reuses the freewheeling circuit of the drive topology. Combined with reused filter capacitors and signal control of the MOSFETs, the PFC rectification and boost function is achieved, enabling the output of stable DC power. This function is implemented by the integrated drive-conversion circuit.

[0057] (II) The integrated power converter for switching reluctance motors suitable for small and medium-sized logistics vehicles provided by this utility model can also realize the charging function of power batteries while retaining the motor driving function, thereby saving costs and reducing size and weight. It has good application prospects in express delivery electric vehicles. This function is realized by an integrated drive conversion circuit.

[0058] (III) The integrated power converter for switching reluctance motor drive and charging of small and medium logistics vehicles provided by this utility model has a simple structure, is easy to operate, safe and reliable, and has strong adaptability. Attached Figure Description

[0059] Figure 1 This is a schematic diagram of the overall structure of the integrated power converter for switching reluctance motor drive and charging, which is applicable to small and medium-sized logistics vehicles according to this utility model.

[0060] Figure 2 This is a circuit diagram of the microcontroller circuit of this utility model.

[0061] Figure 3 This is a circuit diagram of the input voltage step-down circuit of this utility model.

[0062] Figure 4 This is the circuit diagram of the 15V step-down circuit of this utility model.

[0063] Figure 5 This is the circuit diagram of the 5V step-down circuit of this utility model.

[0064] Figure 6 This is a circuit diagram of the drive current detection circuit of this utility model.

[0065] Figure 7 This is a circuit diagram of the zero-crossing and overcurrent detection circuit of this utility model.

[0066] Figure 8 This is a circuit diagram of the input voltage acquisition circuit of this utility model.

[0067] Figure 9 This is a circuit diagram of the first phase voltage acquisition circuit of this utility model.

[0068] Figure 10 This is a circuit diagram of the upper-level drive control circuit of this utility model.

[0069] Figure 11 This is a circuit diagram of the third upper-level drive circuit of this utility model.

[0070] Figure 12 This is a circuit diagram of the third-stage driving circuit of this utility model.

[0071] Figure 13 This is a circuit diagram of the integrated drive conversion circuit of this utility model.

[0072] Figure 14 This is the circuit diagram of the Hall effect detection circuit.

[0073] Figure 15 A simplified circuit diagram is provided for the integrated drive conversion circuit.

[0074] The meanings of the labels in the attached diagram are as follows: 1-Microcontroller circuit, 2-Driver circuit, 3-Detection circuit, 4-Buck converter module circuit, 5-Integrated drive conversion circuit.

[0075] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0076] Unless otherwise specified, all components in this invention are made from components known in the prior art.

[0077] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0078] Example 1: This embodiment provides an integrated power converter for switching reluctance motors suitable for small and medium-sized logistics vehicles, such as... Figure 1 As shown, it includes a microcontroller circuit 1, a drive circuit 2 connected to the microcontroller circuit 1, a detection circuit 3 connected to the microcontroller circuit 1, a step-down module circuit 4 connected to the microcontroller circuit 1, and an integrated drive conversion circuit 5 connected to both the drive circuit 2 and the detection circuit 3.

[0079] Small and medium-sized logistics vehicles refer to logistics vehicles with a power of 1.2kw or less.

[0080] The microcontroller circuit 1 is used to control the drive circuit 2, and the detection circuit 3 detects the current and voltage of important circuits in real time. The drive circuit 2 is used to respond to the output signal of the microcontroller circuit 1 and control the integrated drive conversion circuit 5 through the switching MOSFET. The detection circuit 3 is used to collect the current and voltage of the main circuit and transmit the information to the microcontroller circuit 1. The step-down module circuit 4 is used to reduce the input power supply voltage to the working voltage required by each circuit. The integrated drive conversion circuit 5 is used to control the motor drive and as the main circuit for drive charging conversion.

[0081] The step-down module circuit steps down the input voltage and connects to the microcontroller, drive circuit, and detection circuit. One end of the detection circuit is connected to the integrated drive converter, and the other end is connected to the microcontroller. One end of the drive circuit is connected to the microcontroller, and the other end is connected to the integrated drive converter.

[0082] This project proposes a novel integrated power conversion system for small-to-medium power logistics electric vehicles driven by switched reluctance motors (SRMs). This system integrates motor drive and battery charging functions, and its highly integrated power conversion significantly reduces size and weight, improves assembly efficiency, and increases overall power density. Furthermore, the project includes multiple interfaces for future expansion, effectively adapting to various types of express delivery electric vehicles.

[0083] As a preferred embodiment, the microcontroller circuit 1 uses a microcontroller U79. Pins 31, 32, 33, 34, 45, 48, 67, and 68 of the microcontroller U79 are grounded. Pins 27, 29, 30, and 36 of the microcontroller U79 are connected to the 3.3V output terminal of the step-down module circuit 4. Pins 63 and 65 of the microcontroller U79 are connected to the 5V output terminal of the step-down module circuit 4. Pins 1-4, 60, and 61 of the microcontroller U79 are connected to the drive circuit 2. Pins 7, 18, 41, 42, 44, 46, 51, 56, and 57 of the microcontroller U79 are connected to the detection circuit 3.

[0084] The microcontroller (MCU) receives the voltage levels from the detection circuit to determine whether the motor phase voltage, current, and power supply voltage are normal. If overvoltage or overcurrent occurs, the circuit is immediately disconnected for self-protection. Simultaneously, data is transmitted to the host computer to monitor the circuit's operating status in real time. The MCU controls the motor's movement by outputting voltage levels to the drive circuit. The input voltage is stepped down by the buck module before being supplied to the MCU system.

[0085] As a preferred embodiment, the step-down module circuit 4 includes an input voltage step-down circuit, a 15V step-down circuit, and a 5V step-down circuit.

[0086] The input voltage step-down circuit includes a step-down chip U134. Pin 8 of the step-down chip U134 is connected to the voltage input terminal VCC via capacitor C93, pin 6 of the step-down chip U134 is connected to capacitor C93 via resistor R283, pin 3 of the step-down chip U134 is grounded via resistor R282, and pin 4 of the step-down chip U134 is grounded.

[0087] Pin 7 of the step-down chip U134 is grounded via capacitor C91. The non-grounded end of capacitor C91 is connected to the positive terminal of diode D107. The negative terminal of diode D107 is connected to pin 1 of the step-down chip U134. Pin 2 of the step-down chip U134 is connected to pin 1 of the step-down chip U134 via capacitor C90. Pin 1 of the step-down chip U134 is also connected to one end of inductor U135. The other end of inductor U135 is connected to one end of resistor R284 and resistor R286 respectively. The other end of resistor R284 is connected to pin 5 of the step-down chip U134. The other end of resistor R286 is grounded via capacitor C92. Pin 5 of the step-down chip U134 is grounded via resistor R285.

[0088] One end of the inductor U135 connected to the resistor R284 is also connected to a 15V output terminal, which is connected to a 15V step-down circuit.

[0089] The step-down chip U134 is model LM5007, the diode D107 is model FM540, and the capacitors C90, C91, C92, C93, R282, R283, R284, R285, R286, and the inductor U135 have the following values: 0.01uF, 0.1uF, 15uF, 1uF, 100kΩ, 200kΩ, 3.01kΩ, 1kΩ, 1Ω, and 100uH, respectively.

[0090] The 15V step-down circuit includes the step-down chip U138.

[0091] Pin 1 of the buck converter U138 is connected to the 15V output terminal. Pin 1 of the buck converter U138 is also grounded through capacitor C94. Pin 1 of the buck converter U138 is connected to the negative terminal of diode D108. The positive terminal of diode D108 is grounded through capacitor C95. The positive terminal of diode D108 is also connected to pin 3 of the buck converter U138. Pins 2 and 4 of the buck converter U138 are grounded.

[0092] Pin 3 of the step-down chip U138 is connected to the 5V output terminal, which is connected to the 5V step-down circuit. The step-down chip U138 and diode D108 are model numbers LM7805 and FM540, respectively. The values ​​of capacitors C94 and C95 are 0.22uF and 0.1uF, respectively.

[0093] The 5V step-down circuit includes a step-down chip U140; pin 3 of the step-down chip U140 is connected to the 5V output terminal, and pin 3 of the step-down chip U140 is also grounded through capacitor C96. Pin 2 of the step-down chip U140 is grounded through capacitor C97, and pin 2 of the step-down chip U140 is also connected to the 3.3V output terminal; pin 1 of the step-down chip U140 is grounded.

[0094] The 5V output terminal is connected to pins 63 and 65 of the microcontroller U79; the 3.3V output terminal is connected to pins 27, 29, 30 and 36 of the microcontroller U79.

[0095] The step-down chip U140 uses LR8341, and the values ​​of capacitors C96 and C97 are both 4.7uF.

[0096] As a preferred embodiment, the detection circuit 3 includes a drive current detection circuit, a zero-crossing and overcurrent detection circuit, an input voltage acquisition circuit, and a phase voltage acquisition circuit.

[0097] The drive current detection circuit collects the current of the integrated drive conversion circuit. It includes a detection chip U141. Pin 10 of the detection chip U141 is connected to one end of resistor R297. The other end of resistor R297 is connected to one end of capacitor C105, capacitor C104, and resistor R298, respectively. The other end of capacitor C105, capacitor C104, and resistor R298 is connected to the integrated drive conversion circuit 5. The other end of resistor R298 connected to the integrated drive conversion circuit 5 is grounded through resistor R299.

[0098] Pin 9 of the detection chip U141 is grounded via resistor R296. The grounding terminal of resistor R296 is also connected to the positive terminal of diode D114. The negative terminal of diode D114 is connected to the positive terminal of diode D115. The negative terminal of diode D115 is connected to the 3.3V output terminal.

[0099] Pin 8 of the detection chip U141 is connected to the non-grounded terminals of resistors R295 and R296. Pins 8 and 11 of the detection chip U141 are grounded. Pin 8 of the detection chip U141 is also connected to pin 42 of the microcontroller U79.

[0100] Pin 1 of the detection chip U141 is connected to pin 44 of the microcontroller U79. Pin 1 of the detection chip U141 is also grounded through resistors R287 and R288. The non-grounded end of resistor R288 is connected to the 3.3V output terminal.

[0101] The non-grounded terminal of resistor R288 is also connected to the positive terminal of diode D110, the negative terminal of diode D110 is connected to the positive terminal of diode D111, and the negative terminal of diode D111 is connected to the 3.3V output terminal.

[0102] Pin 1 of the detection chip U141 is also connected to the integrated drive conversion circuit 5 via capacitors C100 and C99, and pin 1 of the detection chip U141 is also connected to the positive terminal of diode D111.

[0103] Pin 2 of the detection chip U141 is connected to one end of resistors R288 and R287. Pin 3 of the detection chip U141 is grounded through resistors R289 and R290. The grounded end of resistor R290 is also connected to resistor R300. The other end of resistor R300 is connected to the integrated drive conversion circuit 5. The non-grounded end of resistor R288 is connected to the 3.3V output terminal.

[0104] One end of resistors R289 and R290 is connected to capacitor C98, and the other end of capacitor C98 is connected to integrated drive conversion circuit 5.

[0105] Pin 5 of the detection chip U141 is grounded via resistors R293, R294 and R301. Pin 7 of the detection chip U141 is grounded via resistors R291 and R292. The grounding terminals of resistors R292 and R301 are also connected to the 3.3V output terminal. Pin 6 of the detection chip U141 is connected to resistor R292.

[0106] Pin 7 of the detection chip U141 is also connected to the non-grounded terminal of resistor R301 via capacitors C103 and C102. Capacitor C101 is also connected in parallel across resistor R294. The grounded section of resistor R292 is also connected to the anode of diode D112. The cathode of diode D112 is connected to the anode of diode D113. The cathode of diode D113 is connected to the 3.3V output terminal. Pin 7 of the detection chip U141 is also connected to the anode of diode D113. Pin 7 of the detection chip U141 is also connected to pin 41 of microcontroller U79.

[0107] One end of capacitor C102 connected to resistor R301 is also connected to integrated drive conversion circuit 5.

[0108] Pin 11 of the detection chip U141 is grounded, and pin 4 of the detection chip U141 is connected to the 5V output terminal. Pin 11 of the detection chip U141 is directly grounded, and pin 4 is connected to 5V. Pin 1 serves as the current detection output terminal, connected to the microcontroller, transmitting the amplified current signal to the microcontroller. Pin 2 is connected to ground through resistors R287 and R288, and then connected to 3.3V through diodes D110 and D111. Pin 3 is connected to one phase of the integrated driver converter through resistors R289 and R290, and capacitors C98, C99, and C100, receiving its current through sampling resistor R300. The current detection circuits for the other two phases are similar and will not be described in detail.

[0109] The detection chip U141 is an LM324DR2G. Capacitors C98, C99, C100, C101, C102, C103, C104, C105, and C106 are all 100uF. Resistors R289, R290, R293, R294, R297, and R298 are all 1kΩ; R235, R241, and R247 are all 10kΩ; and R237, R243, and R249 are all 1.6kΩ. Diodes D110, D111, D112, D113, D114, and D115 are SSC54.

[0110] The zero-crossing and overcurrent detection circuit is used to collect the voltage and current of the integrated drive conversion circuit and output them to the microcontroller to determine whether the voltage has crossed zero and whether the current has exceeded the limit. It includes the operational amplifier chip U93. Pin 1 of the operational amplifier chip U93 is connected to the 3.3V output terminal through resistor R263. Pin 1 of the operational amplifier chip U93 is grounded through capacitor C95. Pin 1 of the operational amplifier chip U93 is also connected to pin 18 of the microcontroller U79.

[0111] Pin 3 of the op-amp chip U93 is connected to pin 46 of the microcontroller U79, and pins 2 and 4 of the op-amp chip U93 are grounded.

[0112] Pin 5 of op-amp chip U93 is connected to the 5V output terminal. Pin 7 of op-amp chip U93 is connected to pin 7 of microcontroller U79. Pin 7 of op-amp chip U93 is connected to pin 5 of op-amp chip U93 via resistor R265. Pin 5 of op-amp chip U93 is also connected to the 3.3V output terminal via resistor R264. Pin 6 of op-amp chip U93 is also connected to pin 41 of microcontroller U79.

[0113] The preferred op-amp chip U93 is LMV393TP, the capacitor C85 is 1nF, the resistor R263 is 4.7kΩ, the resistor R264 is 10kΩ, and the resistor R265 is 510kΩ.

[0114] The input voltage acquisition circuit is used to acquire the input voltage. It includes an operational amplifier chip U90. Pin 3 of the operational amplifier chip U90 is connected to the input voltage through resistors R260, R258, and R259. The connection between resistors R260 and R258 is also connected to the positive terminal of diode D104. The negative terminal of diode D104 is connected to the 3.3V output terminal. The connection between resistors R260 and R258 is also connected to one end of capacitor C84 and one end of resistor R261, respectively. The other ends of capacitor C84 and resistor R261 are grounded.

[0115] A resistor R262 is connected between pin 2 and pin 1 of the operational amplifier chip U90. Pin 1 of the operational amplifier chip U90 is connected to pin 51 of the microcontroller U79. Pin 1 of the operational amplifier chip U90 is also grounded through a bidirectional diode U91.

[0116] Pin 4 of op-amp chip U90 is connected to one end of capacitor C83 and one end of capacitor C82 respectively. The other ends of capacitors C83 and C82 are grounded. Pin 4 of op-amp chip U90 is also connected to the 3.3V output terminal. Pin 8 of op-amp chip U90 is grounded.

[0117] The operational amplifier chip U90 is an LMV358B; the values ​​of capacitors C82, C83, and C84 are all 100nF; the values ​​of resistors R258, R259, R260, R261, and R262 are all 1kΩ; the diode D104 is a 1N4148WS; and the bidirectional diode U91 is a PESD3V3L1BA.

[0118] The phase voltage acquisition circuit includes a first phase voltage acquisition circuit, a second phase voltage acquisition circuit, and a third phase voltage acquisition circuit.

[0119] The first phase voltage acquisition circuit includes an operational amplifier chip U88; pin 1 of the operational amplifier chip U88 is connected to pin 46 of the microcontroller U79 via a resistor R257. One end of the resistor R257 connected to the microcontroller U79 is also connected to one end of the bidirectional diode U89 and one end of the capacitor C81, and the other ends of the bidirectional diode U89 and the capacitor C81 are grounded.

[0120] Pin 1 of op-amp chip U88 is grounded via resistors R256 and R255. Pin 2 of op-amp chip U88 is grounded via resistor R255. Pin 3 of op-amp chip U88 is connected to integrated driver conversion circuit 5 via resistor R253. Pin 4 of op-amp chip U88 is connected to integrated driver conversion circuit 5 via resistor R253. Pin 4 of op-amp chip U88 is grounded. Pin 8 of op-amp chip U88 is connected to the 5V output terminal.

[0121] The structure and connection method of the second-phase voltage acquisition circuit and the third-phase voltage acquisition circuit are the same as those of the first-phase voltage acquisition circuit, as shown in Figure 9. The upper left corner of the first-phase voltage acquisition circuit is BEMFU1, which is connected to pin 46 of the microcontroller U79. The upper left corner of the second-phase voltage acquisition circuit is BEMFU2, which is connected to pin 57 of the microcontroller U79. The upper left corner of the second-phase voltage acquisition circuit is BEMFU3, which is connected to pin 56 of the microcontroller U79.

[0122] As shown in Figure 9, the lower left corner of the first phase voltage acquisition circuit is DIVU1, which is connected to the inductor L3 of the integrated drive conversion circuit. The upper left corner of the second phase voltage acquisition circuit is DIVU2, which is connected to the inductor L1 of the integrated drive conversion circuit. The upper left corner of the second phase voltage acquisition circuit is DIVU3, which is connected to the inductor L2 of the integrated drive conversion circuit.

[0123] The op-amp chip U88 is TP2412, the capacitor C81 is 100nF, the resistors R253, R254, and R256 are all 1kΩ, the resistor R255 is 25kΩ, the resistor R257 is 100R, and the bidirectional diode U89 is PESD3V3L1BA.

[0124] As a preferred embodiment, the driving circuit 2 includes an upper-level driving control circuit, an upper-level driving circuit, and a lower-level driving circuit.

[0125] The upper-level drive control circuit is used to control the upper-level drive circuit. It selects any phase of the drive motor by receiving signals sent by the microcontroller, including the logic chip U44.

[0126] Pins 1, 4, and 10 of logic chip U44 are connected; pin 2 of logic chip U44 is connected to pin 2 of microcontroller U79; pin 5 of logic chip U44 is connected to pin 3 of microcontroller U79; pin 9 of logic chip U44 is connected to pin 4 of microcontroller U79; pins 3, 6, and 8 of logic chip U44 are connected to the upper-level driver circuit; pin 14 of logic chip U44 is connected to the 5V output terminal; pin 7 of logic chip U44 is grounded; chip U44 is a 74HC08D.

[0127] The upper-level drive circuit is used to drive one phase of the upper-level integrated drive converter, and includes a first upper-level drive circuit, a second upper-level drive circuit, and a third upper-level drive circuit.

[0128] The third upper-level drive circuit includes a transistor Q46. The emitter of transistor Q46 is grounded, and the base of transistor Q46 is connected to one end of resistor R148 and one end of resistor R149 respectively. The other end of resistor R148 is grounded, and the other end of resistor R149 is connected to pin 8 of logic chip U44.

[0129] The emitter of transistor Q46 is also connected to the negative terminal of electrolytic capacitor U58. The positive terminal of electrolytic capacitor U58 is connected to the positive terminal of diode D74 and is directly connected to the input voltage. The negative terminal of diode D74 is connected to the emitter of transistor Q45.

[0130] The collector of transistor Q46 is connected to one end of resistor R146 and one end of resistor R147, and the other end of resistor R146 and the other end of resistor R147 are connected to the base of transistor Q45.

[0131] The emitter of transistor Q45 is connected to one end of resistor R145 and the positive terminal of electrolytic capacitor U57. The other end of resistor R145 is connected to the base of transistor Q45. The negative terminal of electrolytic capacitor U57 is connected to one end of resistor R144 and the collector of transistor Q44. The other end of resistor R144 is connected to the base of transistor Q44 and the collector of transistor Q45.

[0132] The collector of transistor Q44 is connected to the base of transistor Q44 via resistors R142 and R143, the negative terminal of diode D75, and the positive terminal of diode D75. The positive terminal of diode D75 is also connected to the collector of transistor Q45.

[0133] The collector of transistor Q44 is also connected to the positive terminal of diode D76 and one end of capacitor C47, respectively. The negative terminal of diode D76 is connected to the emitter of transistor Q44 and the negative terminal of diode D75, respectively. The other end of capacitor C47 is connected to the negative terminal of diode D76.

[0134] The third upper-level drive circuit also includes parallel resistors R150, R151, R152 and R153. One end of the parallel resistors R150, R151, R152 and R153 is connected to the emitter of transistor Q44, and the other end is connected to the integrated drive conversion circuit 5.

[0135] The structure and connection method of the first and second upper-level drive circuits are the same as those of the third upper-level drive circuit.

[0136] like Figure 11 As shown, the upper left corner of the third upper-level drive circuit is NET3, which is connected to the gate of the MOS transistor U165 of the integrated drive conversion circuit. The upper left corner of the second upper-level drive circuit is NET2, which is connected to the gate of the MOS transistor U157 of the integrated drive conversion circuit. The upper left corner of the first upper-level drive circuit is NET1, which is connected to the gate of the MOS transistor U149 of the integrated drive conversion circuit.

[0137] The lower left corner of the third upper-level driver circuit is U3, which is connected to pin 8 of the logic chip U44. The lower left corner of the second upper-level driver circuit is U2, which is connected to pin 3 of the logic chip U44. The lower left corner of the first upper-level driver circuit is U1, which is connected to pin 6 of the logic chip U44.

[0138] Preferably, resistors R142, R143, R144, R145, R146, R147, R148, and R149 are all 2.2kΩ; resistors R150, R151, R152, and R153 are all 4.7Ω; capacitor C47 is 10uF; electrolytic capacitors U57 and U58 are both 100uF / 100V; diodes D74 and D75 are FM540; and transistors Q44, Q45, and Q46 are BFS20.

[0139] The lower-level drive circuit is used to drive one phase of the lower-level integrated drive converter, and includes a first lower-level drive circuit, a second lower-level drive circuit, and a third lower-level drive circuit.

[0140] The third-stage driver circuit includes transistor Q53, whose base is connected to the 3.3V output terminal.

[0141] The collector of transistor Q53 is connected to one end of resistor R179 and the base of transistor Q54, while the other end of resistor R179 is connected to the emitter of transistor Q54.

[0142] The emitter of transistor Q53 is connected to resistors R177 and R178, which are connected to the base of transistor Q55. The base of transistor Q53 is also connected to one end of resistor R176. The other end of resistor R176 is connected to one end of resistor R178, which is connected to one end of resistor R177.

[0143] The end of resistor R177 connected to resistor R178 is also connected to pin 1 of microcontroller U79.

[0144] The collector of transistor Q54 is connected to one end of resistor R180, the other end of resistor R180 is connected to the collector of transistor Q55, the collector of transistor Q55 is also connected to one end of resistor R181, the other end of resistor R181 is connected to the anode of diode D81, the cathode of diode D81 is connected to the collector of transistor Q55, and the emitter of transistor Q55 is also connected to the anode of diode D81.

[0145] The collector of transistor Q55 is also connected to one end of capacitor C50, resistors R182, R183, R184 and R185. The other end of capacitor C50 is grounded, and the other ends of resistors R182, R183, R184 and R185 are connected to integrated drive conversion circuit 5.

[0146] The structure and connection method of the first and second lower-level drive circuits are the same as those of the third lower-level drive circuit. For example... Figure 12 The third lower-level driver circuit is connected to pin 1 of the microcontroller U79 via PB12. The second lower-level driver circuit is connected to pin 62 of the microcontroller U79 via PB11. The first lower-level driver circuit is connected to pin 61 of the microcontroller U79 via PB10.

[0147] The right end of the third lower-level drive circuit is NET13, which is connected to the gate of MOSFET U178. Below the second lower-level drive circuit is NET12, which is connected to the gate of MOSFET U164. Below the first lower-level drive circuit is NET11, which is connected to the gate of MOSFET U156.

[0148] Resistors R177, R178, and R179 are all 10kΩ; resistors R176 and R181 are both 2.2kΩ; resistors R182, R183, R184, and R185 are all 4.7Ω; resistor R180 is 33Ω; capacitor C50 is 10uF; diode D81 is LL4148; transistors Q53, Q54, and Q55 are all BFS20.

[0149] As a preferred embodiment, the integrated drive conversion circuit 5 includes MOSFETs U149, U150, U151, and U152. The drains of MOSFETs U149, U150, U151, and U152 are connected to the VCC terminal. The gates of MOSFETs U149, U150, U151, and U152 are connected to the first upper-level drive circuit. The sources of MOSFETs U149, U150, U151, and U152 are connected to the resistor R253 of the first phase voltage acquisition circuit.

[0150] The integrated drive conversion circuit 5 includes MOSFETs U157, U158, U159, and U160. The drains of MOSFETs U157, U158, U159, and U160 are connected to the VCC terminal. The gates of MOSFETs U157, U158, U159, and U160 are connected to the second upper-level drive circuit. The sources of MOSFETs U157, U158, U159, and U160 are connected to the second phase voltage acquisition circuit.

[0151] The integrated drive conversion circuit 5 includes MOSFETs U165, U166, U167, and U168. The drains of MOSFETs U165, U166, U167, and U168 are connected to the VCC terminal. The gates of MOSFETs U165, U166, U167, and U168 are connected to the third upper-level drive circuit. The sources of MOSFETs U165, U166, U167, and U168 are connected to the third phase voltage acquisition circuit.

[0152] The integrated drive conversion circuit 5 includes MOSFETs U153, U154, U155, and U156. The drains of MOSFETs U153, U154, U155, and U156 are connected and then connected to resistor R253 of the first phase voltage acquisition circuit via inductor L3. The gates of MOSFETs U153, U154, U155, and U156 are connected and then connected to the first lower-level drive circuit. The sources of MOSFETs U153, U154, U155, and U156 are connected and then connected to the non-grounded terminal of resistor R300.

[0153] The integrated drive conversion circuit 5 includes MOSFETs U161, U162, U163, and U164. The drains of MOSFETs U161, U162, U163, and U164 are connected and then connected to the second phase voltage acquisition circuit via inductor L1. The gates of MOSFETs U161, U162, U163, and U164 are connected and then connected to the second lower-level drive circuit. The sources of MOSFETs U161, U162, U163, and U164 are connected and then connected to the non-grounded terminal of resistor R301.

[0154] The integrated drive conversion circuit 5 includes MOSFETs U175, U176, U177, and U178. The drains of MOSFETs U175, U176, U177, and U178 are connected and then connected to the third phase voltage acquisition circuit via inductor L2. The gates of MOSFETs U175, U176, U177, and U178 are connected and then connected to resistor R185 of the third lower-level drive circuit. The sources of MOSFETs U175, U176, U177, and U178 are connected and then connected to the non-grounded terminal of resistor R299.

[0155] The integrated drive conversion circuit 5 also includes diodes D121 and D120 connected in parallel. The anodes of diodes D121 and D120 are connected to the drain of MOSFET U153, and the cathodes of diodes D121 and D120 are connected to the VCC terminal.

[0156] The integrated drive conversion circuit 5 also includes electrolytic capacitors U180 and U181 connected in parallel. The positive terminals of electrolytic capacitors U180 and U181 are connected to the VCC terminal, and the negative terminals of electrolytic capacitors U180 and U181 are grounded.

[0157] The integrated drive conversion circuit 5 also includes diodes D118 and D116 connected in parallel. The anodes of diodes D118 and D116 are connected to the drain of MOSFET U161, and the cathodes of diodes D118 and D116 are connected to the VCC terminal.

[0158] The integrated drive conversion circuit 5 also includes electrolytic capacitors U183 and U182 connected in parallel. The positive terminals of electrolytic capacitors U183 and U182 are connected to the VCC terminal, and the negative terminals of electrolytic capacitors U183 and U182 are grounded.

[0159] The integrated drive conversion circuit 5 also includes diodes D119 and D117 connected in parallel. The anodes of diodes D119 and D117 are connected to the drain of MOSFET U175, and the cathodes of diodes D119 and D117 are connected to the VCC terminal.

[0160] The integrated drive conversion circuit 5 also includes electrolytic capacitors U184 and U185 connected in parallel. The positive terminals of electrolytic capacitors U184 and U185 are connected to the VCC terminal, and the negative terminals of electrolytic capacitors U184 and U185 are grounded.

[0161] The integrated drive conversion circuit 5 also includes MOSFET U169 and MOSFET U170. The source, drain and gate of MOSFET U169 and MOSFET U170 are all grounded. The drain of MOSFET U169 and MOSFET U170 is also connected to the resistor R253 of the first phase voltage acquisition circuit.

[0162] The integrated drive conversion circuit 5 also includes MOSFETs U171 and U172. The source, drain, and gate of MOSFETs U171 and U172 are all grounded. The drain of MOSFETs U171 and U172 is also connected to the second phase voltage acquisition circuit.

[0163] The integrated drive conversion circuit 5 also includes MOSFETs U173 and U174. The source, drain, and gate of MOSFETs U173 and U174 are all grounded. The drain of MOSFETs U173 and U174 is also connected to the third phase voltage acquisition circuit.

[0164] The integrated drive conversion circuit 5 also includes an electrolytic capacitor U179, with the positive terminal of the electrolytic capacitor U179 connected to the VCC terminal and the negative terminal grounded.

[0165] It also includes an outer casing, in which the switched reluctance motor drive integrated power converter suitable for small and medium-sized logistics vehicles is installed.

[0166] MOSFETs U149, U150, U151, U152, U153, U154, U155, U156, U157, U158, U159, U160, U161, U162, U163, U164, U165, U166, U167, U168, U169, U170, U171, U172, and U179. MOSFETs U173, U174, U175, U176, U177, and U178 are all IRF740A; electrolytic capacitors U179, U180, U181, U182, U183, U184, and U185 are all 63V / 4700uF; inductors L1, L2, and L3 are all 30A / 100uH; diodes D116, D117, D118, D119, D120, and D121 are all MBR20100.

[0167] The specific working process of this utility model: using Figure 15 This explanation briefly covers the main circuit components. During charging, K7 is open. Taking AC power flowing out from phase A as an example, it charges C1 through D1 and returns to the power supply through D2, charging capacitor C1 again. This provides a stable voltage output to the downstream buck circuit. The buck circuit uses switching transistor K5 to chop the input DC power supply, forming a square wave. This square wave controls the switching transistor, allowing it to turn on and off according to the control signal. The duty cycle of the square wave can be adjusted to control the voltage at the gate of K5. Adding capacitors and inductors for filtering achieves voltage reduction. When K5 is closed, the input voltage stores energy through the C-phase winding and charges the output capacitor. At this time, the circuit forms a low-impedance path, with energy stored in the C-phase winding. When K5 is open, the energy stored in the C-phase winding is released to the load capacitor and the load. At this time, the circuit disconnects from the input voltage, and the C-phase winding and the output capacitor form a closed loop. The C-phase winding in the circuit uses the unidirectional conduction of diode D5 and the filtering effect of the capacitor to charge the battery. As long as the square wave frequency of the control switch is high enough, it is considered that there is a stable voltage input to the battery.

[0168] When the drive circuit is working, K7 is closed, which in turn turns on the switching transistors K1, K2, K3, K4, K5, and K6 in turn, enabling them to work phase by phase, and generating a magnetic field by energizing the windings. When a phase is in the open state, the circuit uses diodes to freewheel the inductor and charge the capacitor behind it. This not only dissipates the reverse electromotive force generated when the winding inductor is de-energized, preventing it from being broken down or burned by reverse voltage, but also makes secondary use of the energy in the windings, reducing energy waste.

[0169] To ensure the stability and reliability of the AC-DC converter, it needs to be controlled. The system uses voltage and current closed-loop PI control to ensure its stability and reliability. The voltage and current output of the circuit are acquired in real time through voltage and current sensors, modulated into a voltage analog signal, and the main controller acquires the voltage value through ADC data acquisition, performing proportional (P) and integral (I) operations. This value is then multiplied by the measured PI parameters, and the output value is the duty cycle of the K5 gate control signal. By changing the duty cycle of the PWM signal, the on / off time of K5 is adjusted, thereby stabilizing the output value of the AC-DC converter.

[0170] This project also reserves multiple interfaces for future expansion. See [link / reference] Figure 14 This is used to connect an external Hall effect sensor to detect the rotational position of the motor. It includes pin headers H1, H2, and H3; resistors R208, R209, R210, R211, R212, and R213; capacitors C60, C61, and C62; and diodes U62, U63, and U64. Taking one phase as an example, pin header H1 is connected to the microcontroller's PA0 pin via diode U62 and resistor R208. The 3.3V voltage is connected to the circuit via resistor R213, and the circuit is connected to ground via capacitor C62. The other two phases are the same and will not be described further.

[0171] Pin headers H1, H2, and H3 are all HDR-M_2.54; resistors R208, R209, R210, R211, R212, and R213 are all 10kΩ; capacitors C60, C61, and C62 are all 100nF; diodes U62, U63, and U64 are all M7 type.

[0172] By reconfiguring the converter components and motor windings in the drive system and reusing them in the charging system with relevant controllers, the drive and charging functions can be integrated. In drive mode, the drive circuit drives the motor through the power converter. When switching to charging mode, the motor windings and converter switching devices are reused in the charging system to charge the battery.

[0173] In the integration of the charging circuit and the driving circuit, a bridgeless boost rectifier and buck converter are used to convert the 220V voltage to 70V voltage to power the battery.

[0174] use Figure 15 To explain, during charging, K7 is open. Taking AC power flowing out from phase A as an example, it charges C1 through D1 and returns to the power source through D2 to charge capacitor C1 again, providing a stable voltage output to the downstream buck circuit. The buck circuit uses switching transistor K5 to chop the input DC power supply into a square wave. This square wave controls the switching transistor, causing it to turn on and off according to the control signal. The duty cycle of the square wave can be adjusted to control the voltage at the gate of K5. Adding capacitors and inductors for filtering achieves voltage reduction. When K5 is closed, the input voltage stores energy through the C-phase winding and charges the output capacitor. At this time, the circuit forms a low-impedance path, with the C-phase winding storing energy. When K5 is open, the energy stored in the C-phase winding is released to the load capacitor and the load. At this time, the circuit disconnects from the input voltage, and the C-phase winding and the output capacitor form a closed loop. The C-phase winding in the circuit uses the unidirectional conduction of diode D5 and the filtering effect of the capacitor to charge the battery. As long as the square wave frequency of the control switch is high enough, it is considered that there is a stable voltage input to the battery.

[0175] When the drive circuit is working, K7 is closed, which in turn turns on the switching transistors K1, K2, K3, K4, K5, and K6 in turn, enabling them to work phase by phase, and generating a magnetic field by energizing the windings. When a phase is in the open state, the circuit uses diodes to freewheel the inductor and charge the capacitor behind it. This not only dissipates the reverse electromotive force generated when the winding inductor is de-energized, preventing it from being broken down or burned by reverse voltage, but also makes secondary use of the energy in the windings, reducing energy waste.

[0176] To ensure the stability and reliability of the AC-DC converter, it needs to be controlled. The system uses voltage and current closed-loop PI control to ensure its stability and reliability. The voltage and current output of the circuit are acquired in real time through voltage and current sensors, modulated into a voltage analog signal, and the main controller acquires the voltage value through ADC data acquisition, performing proportional (P) and integral (I) operations. This value is then multiplied by the measured PI parameters, and the output value is the duty cycle of the K5 gate control signal. By changing the duty cycle of the PWM signal, the on / off time of K5 is adjusted, thereby stabilizing the output value of the AC-DC converter.

[0177] The integrated power converter for switching reluctance motor drive and charging suitable for small and medium-sized logistics vehicles also includes a housing, in which the integrated power converter for switching reluctance motor drive and charging suitable for small and medium-sized logistics vehicles is installed.

[0178] The above technical solutions are only preferred embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art without creative effort within the technical scope disclosed in this utility model are covered within the protection scope of this utility model.

Claims

1. A switched reluctance motor drive and charging integrated power converter suitable for small and medium-sized logistics vehicles, characterized in that, It includes a microcontroller circuit (1), a drive circuit (2) connected to the microcontroller circuit (1), a detection circuit (3) connected to the microcontroller circuit (1), a step-down module circuit (4) connected to the microcontroller circuit (1), and an integrated drive converter circuit (5) connected to both the drive circuit (2) and the detection circuit (3). The microcontroller circuit (1) is used to control the drive circuit (2), and the current and voltage of the circuit are detected in real time by the detection circuit (3); The driving circuit (2) is used to respond to the output signal of the microcontroller circuit (1) and control the integrated driving conversion circuit (5) through the switching MOS transistor. The detection circuit (3) is used to collect current and voltage and transmit the information to the microcontroller circuit (1). The step-down module circuit (4) is used to reduce the input power supply voltage to the operating voltage required by each circuit; The integrated drive conversion circuit (5) is used to control the motor drive and as a drive charging conversion circuit.

2. The switched reluctance motor drive and charging integrated power converter suitable for small and medium-sized logistics vehicles as described in claim 1, characterized in that, The microcontroller circuit (1) mentioned above uses a microcontroller U79; Pins 31, 32, 33, 34, 45, 48, 67, and 68 of the microcontroller U79 are grounded. Pins 27, 29, 30, and 36 of the microcontroller U79 are connected to the 3.3V output terminal of the step-down module circuit (4). Pins 63 and 65 of the microcontroller U79 are connected to the 5V output terminal of the step-down module circuit (4). Pins 1-4, 60, and 61 of the microcontroller U79 are connected to the drive circuit (2). Pins 7, 18, 41, 42, 44, 46, 51, 56, and 57 of the microcontroller U79 are connected to the detection circuit (3).

3. The switched reluctance motor drive and charging integrated power converter suitable for small and medium-sized logistics vehicles as described in claim 1, characterized in that, The step-down module circuit (4) includes an input voltage step-down circuit, a 15V step-down circuit, and a 5V step-down circuit; The input voltage step-down circuit includes a step-down chip U134; Pin 8 of the buck chip U134 is connected to the voltage input terminal VCC via capacitor C93, pin 6 of the buck chip U134 is connected to capacitor C93 via resistor R283, pin 3 of the buck chip U134 is grounded via resistor R282, and pin 4 of the buck chip U134 is grounded. Pin 7 of the buck converter chip U134 is grounded via capacitor C91. The non-grounded end of capacitor C91 is connected to the positive terminal of diode D107. The negative terminal of diode D107 is connected to pin 1 of the buck converter chip U134. Pin 2 of the buck converter chip U134 is connected to pin 1 of the buck converter chip U134 via capacitor C90. Pin 1 of the buck converter chip U134 is also connected to one end of inductor U135. The other end of inductor U135 is connected to one end of resistor R284 and resistor R286 respectively. The other end of resistor R284 is connected to pin 5 of the buck converter chip U134. The other end of resistor R286 is grounded via capacitor C92. Pin 5 of the buck converter chip U134 is grounded via resistor R285. The inductor U135 is connected to one end of the resistor R284, which is also connected to a 15V output terminal, and the 15V output terminal is connected to a 15V step-down circuit. The 15V step-down circuit includes a step-down chip U138, and pin 1 of the step-down chip U138 is connected to the 15V output terminal. Pin 1 of the buck converter U138 is also grounded via capacitor C94; pin 1 of the buck converter U138 is connected to the negative terminal of diode D108, the positive terminal of diode D108 is grounded via capacitor C95, the positive terminal of diode D108 is also connected to pin 3 of the buck converter U138, and pins 2 and 4 of the buck converter U138 are grounded. Pin 3 of the step-down chip U138 is connected to the 5V output terminal, which is then connected to the 5V step-down circuit. The 5V step-down circuit includes a step-down chip U140. Pin 3 of the step-down chip U140 is connected to the 5V output terminal. Pin 3 of the step-down chip U140 is also grounded through capacitor C96. Pin 2 of the step-down chip U140 is grounded through capacitor C97. Pin 2 of the step-down chip U140 is also connected to the 3.3V output terminal. Pin 1 of the step-down chip U140 is grounded. The 5V output terminal is connected to pins 63 and 65 of the microcontroller U79; The 3.3V output terminal is connected to pins 27, 29, 30 and 36 of the microcontroller U79.

4. The integrated power converter for switching reluctance motor drive and charging suitable for small and medium-sized logistics vehicles as described in claim 1, characterized in that, The detection circuit (3) includes a drive current detection circuit, a zero-crossing and overcurrent detection circuit, an input voltage acquisition circuit, and a phase voltage acquisition circuit; The drive current detection circuit includes a detection chip U141. Pin 10 of the detection chip U141 is connected to one end of resistor R297. The other end of resistor R297 is connected to one end of capacitor C105, capacitor C104, and resistor R298 respectively. The other ends of capacitor C105, capacitor C104, and resistor R298 are connected to the integrated drive conversion circuit (5). The other end of resistor R298 connected to the integrated drive conversion circuit (5) is grounded through resistor R299. Pin 9 of the detection chip U141 is grounded via resistor R296. The grounding terminal of resistor R296 is also connected to the positive terminal of diode D114. The negative terminal of diode D114 is connected to the positive terminal of diode D115. The negative terminal of diode D115 is connected to the 3.3V output terminal. Pin 8 of the detection chip U141 is connected to the non-grounded end of resistor R295 and resistor R296. Pins 8 and 11 of the detection chip U141 are grounded. Pin 8 of the detection chip U141 is also connected to pin 42 of the microcontroller U79. Pin 1 of the detection chip U141 is connected to pin 44 of the microcontroller U79. Pin 1 of the detection chip U141 is also grounded through resistors R287 and R288. The non-grounded end of resistor R288 is connected to the 3.3V output terminal. The non-grounded terminal of resistor R288 is also connected to the positive terminal of diode D110, the negative terminal of diode D110 is connected to the positive terminal of diode D111, and the negative terminal of diode D111 is connected to the 3.3V output terminal. Pin 1 of the detection chip U141 is also connected to the integrated drive conversion circuit (5) via capacitor C100 and capacitor C99, and pin 1 of the detection chip U141 is also connected to the positive terminal of diode D111. Pin 2 of the detection chip U141 is connected to one end of resistor R288 and resistor R287. Pin 3 of the detection chip U141 is grounded through resistor R289 and resistor R290. The grounded end of resistor R290 is also connected to resistor R300. The other end of resistor R300 is connected to the integrated drive conversion circuit (5). The non-grounded end of resistor R288 is connected to the 3.3V output terminal. One end of resistors R289 and R290 is also connected to capacitor C98, and the other end of capacitor C98 is connected to the integrated drive conversion circuit (5). Pin 5 of the detection chip U141 is grounded via resistors R293, R294 and R301; pin 7 of the detection chip U141 is grounded via resistors R291 and R292; the grounding terminals of resistors R292 and R301 are also connected to the 3.3V output terminal; pin 6 of the detection chip U141 is connected to resistor R292. Pin 7 of the detection chip U141 is also connected to the non-grounded terminal of resistor R301 via capacitors C103 and C102. Capacitor C101 is also connected in parallel across resistor R294. The grounded section of resistor R292 is also connected to the anode of diode D112. The cathode of diode D112 is connected to the anode of diode D113. The cathode of diode D113 is connected to the 3.3V output terminal. Pin 7 of the detection chip U141 is also connected to the anode of diode D113. Pin 7 of the detection chip U141 is also connected to pin 41 of microcontroller U79. The capacitor C102 is connected to one end of the resistor R301 and is also connected to the integrated drive conversion circuit (5). Pin 11 of the detection chip U141 is grounded, and pin 4 of the detection chip U141 is connected to the 5V output terminal. The zero-crossing and overcurrent detection circuit includes an operational amplifier chip U93. Pin 1 of the operational amplifier chip U93 is connected to the 3.3V output terminal via resistor R263, and pin 1 of the operational amplifier chip U93 is grounded via capacitor C95. Pin 1 of the operational amplifier chip U93 is also connected to pin 18 of the microcontroller U79. Pin 3 of the operational amplifier chip U93 is connected to pin 46 of the microcontroller U79, and pins 2 and 4 of the operational amplifier chip U93 are grounded. Pin 5 of the operational amplifier chip U93 is connected to the 5V output terminal, pin 7 of the operational amplifier chip U93 is connected to pin 7 of the microcontroller U79, pin 7 of the operational amplifier chip U93 is connected to pin 5 of the operational amplifier chip U93 via resistor R265, pin 5 of the operational amplifier chip U93 is also connected to the 3.3V output terminal via resistor R264, and pin 6 of the operational amplifier chip U93 is also connected to pin 41 of the microcontroller U79; The input voltage acquisition circuit includes an operational amplifier chip U90. Pin 3 of the operational amplifier chip U90 is connected to the input voltage through resistors R260, R258, and R259. The connection between resistors R260 and R258 is also connected to the positive terminal of diode D104. The negative terminal of diode D104 is connected to the 3.3V output terminal. The connection between resistors R260 and R258 is also connected to one end of capacitor C84 and one end of resistor R261, respectively. The other ends of capacitor C84 and resistor R261 are grounded. A resistor R262 is connected between pin 2 and pin 1 of the operational amplifier chip U90. Pin 1 of the operational amplifier chip U90 is connected to pin 51 of the microcontroller U79. Pin 1 of the operational amplifier chip U90 is also grounded through a bidirectional diode U91. Pin 4 of the operational amplifier chip U90 is connected to one end of capacitor C83 and one end of capacitor C82, respectively. The other ends of capacitors C83 and C82 are grounded. Pin 4 of the operational amplifier chip U90 is also connected to the 3.3V output terminal. Pin 8 of the operational amplifier chip U90 is grounded; The phase voltage acquisition circuit includes a first phase voltage acquisition circuit, a second phase voltage acquisition circuit, and a third phase voltage acquisition circuit; The first phase voltage acquisition circuit includes an operational amplifier chip U88. Pin 1 of the operational amplifier chip U88 is connected to pin 46 of the microcontroller U79 via a resistor R257. One end of the resistor R257 connected to the microcontroller U79 is also connected to one end of a bidirectional diode U89 and one end of a capacitor C81. The other ends of the bidirectional diode U89 and the capacitor C81 are grounded. Pin 1 of the operational amplifier chip U88 is grounded via resistors R256 and R255, pin 2 of the operational amplifier chip U88 is grounded via resistor R255, pin 3 of the operational amplifier chip U88 is connected to the integrated drive conversion circuit (5) via resistor R253, pin 4 of the operational amplifier chip U88 is connected to the integrated drive conversion circuit (5) via resistor R253, pin 4 of the operational amplifier chip U88 is grounded, and pin 8 of the operational amplifier chip U88 is connected to the 5V output terminal. The structure and connection method of the second-phase voltage acquisition circuit and the third-phase voltage acquisition circuit are the same as those of the first-phase voltage acquisition circuit.

5. The integrated power converter for switching reluctance motor drive and charging suitable for small and medium-sized logistics vehicles as described in claim 1, characterized in that, The drive circuit (2) includes an upper-level drive control circuit, an upper-level drive circuit, and a lower-level drive circuit; The upper-level drive control circuit includes a logic chip U44. Pins 1, 4, and 10 of the logic chip U44 are connected. Pin 2 of the logic chip U44 is connected to pin 2 of the microcontroller U79. Pin 5 of the logic chip U44 is connected to pin 3 of the microcontroller U79. Pin 9 of the logic chip U44 is connected to pin 4 of the microcontroller U79. Pins 3, 6, and 8 of the logic chip U44 are connected to the upper-level drive circuit. Pin 14 of the logic chip U44 is connected to the 5V output terminal. Pin 7 of the logic chip U44 is grounded. The aforementioned upper-level driving circuit includes a first upper-level driving circuit, a second upper-level driving circuit, and a third upper-level driving circuit; The third upper-level driving circuit includes a transistor Q46. The emitter of the transistor Q46 is grounded, and the base of the transistor Q46 is connected to one end of resistor R148 and one end of resistor R149, respectively. The other end of resistor R148 is grounded, and the other end of resistor R149 is connected to pin 8 of logic chip U44. The emitter of the transistor Q46 is also connected to the negative terminal of the electrolytic capacitor U58. The positive terminal of the electrolytic capacitor U58 is connected to the positive terminal of the diode D74 and is directly connected to the input voltage. The negative terminal of the diode D74 is connected to the emitter of the transistor Q45. The collector of transistor Q46 is connected to one end of resistor R146 and one end of resistor R147, and the other ends of resistor R146 and resistor R147 are connected to the base of transistor Q45. The emitter of transistor Q45 is connected to one end of resistor R145 and the positive terminal of electrolytic capacitor U57. The other end of resistor R145 is connected to the base of transistor Q45. The negative terminal of electrolytic capacitor U57 is connected to one end of resistor R144 and the collector of transistor Q44. The other end of resistor R144 is connected to the base of transistor Q44 and the collector of transistor Q45. The collector of transistor Q44 is connected to the base of transistor Q44 via resistors R142 and R143, the negative terminal of diode D75, and the positive terminal of diode D75. The positive terminal of diode D75 is also connected to the collector of transistor Q45. The collector of transistor Q44 is also connected to the positive terminal of diode D76 and one end of capacitor C47, respectively. The negative terminal of diode D76 is connected to the emitter of transistor Q44 and the negative terminal of diode D75, respectively. The other end of capacitor C47 is connected to the negative terminal of diode D76. The third upper-level driving circuit also includes parallel resistors R150, R151, R152 and R153. One end of the parallel resistors R150, R151, R152 and R153 is connected to the emitter of transistor Q44, and the other end is connected to the integrated driving conversion circuit (5). The structure and connection method of the first and second upper-level driving circuits are the same as those of the third upper-level driving circuit. The lower-level driving circuit includes a first lower-level driving circuit, a second lower-level driving circuit, and a third lower-level driving circuit; The third lower-level driving circuit includes a transistor Q53. The base of transistor Q53 is connected to the 3.3V output terminal. The collector of transistor Q53 is connected to one end of resistor R179 and the base of transistor Q54. The other end of resistor R179 is connected to the emitter of transistor Q54. The emitter of transistor Q53 is connected to resistors R177 and R178 and then to the base of transistor Q55. The base of transistor Q53 is also connected to one end of resistor R176. The other end of resistor R176 is connected to one end of resistor R178, which is connected to one end of resistor R177. The end of resistor R177 connected to resistor R178 is also connected to pin 1 of microcontroller U79. The collector of transistor Q54 is connected to one end of resistor R180, the other end of resistor R180 is connected to the collector of transistor Q55, the collector of transistor Q55 is also connected to one end of resistor R181, the other end of resistor R181 is connected to the anode of diode D81, the cathode of diode D81 is connected to the collector of transistor Q55, and the emitter of transistor Q55 is also connected to the anode of diode D81. The collector of the transistor Q55 is also connected to one end of capacitor C50, resistor R182, resistor R183, resistor R184 and resistor R185. The other end of capacitor C50 is grounded, and the other ends of resistor R182, resistor R183, resistor R184 and resistor R185 are connected to the integrated drive conversion circuit (5).

6. The switched reluctance motor drive and charging integrated power converter suitable for small and medium-sized logistics vehicles as described in claim 1, characterized in that, The integrated drive conversion circuit (5) includes MOSFET U149, MOSFET U150, MOSFET U151 and MOSFET U152; The drains of MOSFETs U149, U150, U151, and U152 are connected to the VCC terminal. The gates of MOSFETs U149, U150, U151, and U152 are connected to the first upper-level driving circuit. The sources of MOSFETs U149, U150, U151, and U152 are connected to the resistor R253 of the first phase voltage acquisition circuit. The integrated drive conversion circuit (5) includes MOSFET U157, MOSFET U158, MOSFET U159 and MOSFET U160; The drains of MOSFETs U157, U158, U159, and U160 are connected to the VCC terminal; the gates of MOSFETs U157, U158, U159, and U160 are connected to the second upper-level driving circuit; and the sources of MOSFETs U157, U158, U159, and U160 are connected to the second phase voltage acquisition circuit. The integrated drive conversion circuit (5) includes MOSFET U165, MOSFET U166, MOSFET U167 and MOSFET U168; The drains of MOSFETs U165, U166, U167, and U168 are connected to the VCC terminal; the gates of MOSFETs U165, U166, U167, and U168 are connected to the third upper-level driving circuit; and the sources of MOSFETs U165, U166, U167, and U168 are connected to the third phase voltage acquisition circuit. The integrated drive conversion circuit (5) includes MOSFETs U153, U154, U155, and U156. The drains of MOSFETs U153, U154, U155, and U156 are connected and then connected to resistor R253 of the first phase voltage acquisition circuit via inductor L3. The gates of MOSFETs U153, U154, U155, and U156 are connected and then connected to the first lower-level driving circuit. The sources of MOSFETs U153, U154, U155, and U156 are connected and then connected to the non-grounded terminal of resistor R300. The integrated drive conversion circuit (5) includes MOSFET U161, MOSFET U162, MOSFET U163 and MOSFET U164; The drains of MOSFETs U161, U162, U163, and U164 are connected and then connected to the second phase voltage acquisition circuit via inductor L1. The gates of MOSFETs U161, U162, U163, and U164 are connected and then connected to the second lower-level driving circuit. The sources of MOSFETs U161, U162, U163, and U164 are connected and then connected to the non-grounded terminal of resistor R301. The integrated drive conversion circuit (5) includes MOSFET U175, MOSFET U176, MOSFET U177 and MOSFET U178; The drains of MOSFETs U175, U176, U177, and U178 are connected and then connected to the third phase voltage acquisition circuit via inductor L2. The gates of MOSFETs U175, U176, U177, and U178 are connected and then connected to resistor R185 of the third lower-level drive circuit. The sources of MOSFETs U175, U176, U177, and U178 are connected and then connected to the non-grounded terminal of resistor R299. The integrated drive conversion circuit (5) further includes diodes D121 and D120 connected in parallel. The positive terminals of diodes D121 and D120 are connected to the drain of MOSFET U153, and the negative terminals of diodes D121 and D120 are connected to the VCC terminal. The integrated drive conversion circuit (5) further includes electrolytic capacitors U180 and U181 connected in parallel. The positive terminals of electrolytic capacitors U180 and U181 are connected to the VCC terminal, and the negative terminals of electrolytic capacitors U180 and U181 are grounded. The integrated drive conversion circuit (5) further includes diodes D118 and D116 connected in parallel. The positive terminals of diodes D118 and D116 are connected to the drain of MOSFET U161, and the negative terminals of diodes D118 and D116 are connected to the VCC terminal. The integrated drive conversion circuit (5) further includes electrolytic capacitors U183 and U182 connected in parallel. The positive terminals of electrolytic capacitors U183 and U182 are connected to the VCC terminal, and the negative terminals of electrolytic capacitors U183 and U182 are grounded. The integrated drive conversion circuit (5) further includes diodes D119 and D117 connected in parallel. The positive terminals of diodes D119 and D117 are connected to the drain of MOSFET U175, and the negative terminals of diodes D119 and D117 are connected to the VCC terminal. The integrated drive conversion circuit (5) further includes electrolytic capacitors U184 and U185 connected in parallel. The positive terminals of electrolytic capacitors U184 and U185 are connected to the VCC terminal, and the negative terminals of electrolytic capacitors U184 and U185 are grounded. The integrated drive conversion circuit (5) further includes MOS transistor U169 and MOS transistor U170. The source, drain and gate of MOS transistor U169 and MOS transistor U170 are all grounded. The drain of MOS transistor U169 and MOS transistor U170 is also connected to the resistor R253 of the first phase voltage acquisition circuit. The integrated drive conversion circuit (5) further includes MOS transistor U171 and MOS transistor U172. The source, drain and gate of MOS transistor U171 and MOS transistor U172 are all grounded. The drain of MOS transistor U171 and MOS transistor U172 is also connected to the second phase voltage acquisition circuit. The integrated drive conversion circuit (5) further includes MOS transistor U173 and MOS transistor U174. The source, drain and gate of MOS transistor U173 and MOS transistor U174 are all grounded. The drain of MOS transistor U173 and MOS transistor U174 is also connected to the third phase voltage acquisition circuit. The integrated drive conversion circuit (5) further includes an electrolytic capacitor U179, the positive terminal of which is connected to the VCC terminal and the negative terminal is grounded.

7. The switched reluctance motor drive and charging integrated power converter applicable to small and medium-sized logistics vehicles as described in any one of claims 1-6, characterized in that, It also includes an outer casing, in which the switched reluctance motor drive integrated power converter suitable for small and medium-sized logistics vehicles is installed.

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