Alternating current and direct current dual-purpose vehicle-mounted starting power generation control method and system compatible with commercial power

Abstract

The invention discloses an AC-DC dual-purpose vehicle-mounted starting power generation control method and system compatible with commercial power, and the method comprises the steps: firstly constructing an AC-DC dual-purpose vehicle-mounted starting power generation module, and then enabling a power battery to provide energy for a permanent magnet generator through an inversion unit in the starting stage of an engine through the AC-DC dual-purpose vehicle-mounted starting power generation module; the direct-current electric energy is converted into mechanical energy through the permanent magnet generator to start the engine, and the engine is dragged to the idling speed; the power generation module has the functions of outputting alternating-current electric energy and direct-current electric energy and being compatible with the mains supply, the size and weight of the power generation module can be reduced by multiplexing the LC filter in the mains supply mode, and a starter of an engine can be omitted; and the permanent magnet generator can be directly adopted to start the engine, so that the weight and the size of the power generation module are further reduced, meanwhile, smooth switching of engine starting and power generation can be achieved by adopting a starting and power generation switching control strategy, the starting speed of the engine is increased, and the system is suitable for being widely popularized and used.

Description

Technical Field

[0001] This invention relates to the field of vehicle-mounted power generation technology, specifically to a dual-power AC / DC vehicle-mounted starting and power generation control method and system compatible with mains power. Background Technology

[0002] The AC / DC dual-purpose on-board starter-generator system represents the future direction of on-board electrical systems. Through high integration and advanced power electronics technology, it integrates starting, power generation, and AC / DC power supply functions into one system. It not only improves fuel economy and optimizes the start-stop experience, but more importantly, it endows vehicles with powerful external power supply capabilities (especially AC output), greatly expanding the application range and ease of use of vehicles. It is an indispensable key technology in the electrification and intelligentization of automobiles. As the technology matures and costs decrease, its application will become increasingly widespread.

[0003] Currently, existing three-phase inverter power supply systems generally do not support both AC and DC power, resulting in poor power generation performance of the vehicle-mounted starting and generating system during startup. In addition, when compatible with mains power, the three-phase inverter power supply is bulky, and the engine's built-in starter motor has a long startup time in low-temperature environments, which not only reduces the engine's starting efficiency but also limits the application range of the vehicle-mounted generating system. Therefore, it is necessary to design a vehicle-mounted starting and generating control method and system that is compatible with mains power and supports both AC and DC power. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and to better and more effectively solve the problems of poor power generation performance of vehicle-mounted starting and generating systems due to the fact that existing three-phase inverter power supply systems generally do not support AC / DC dual-use, while the three-phase inverter power supply is large in size when compatible with mains power, and the engine's built-in starter motor has a long starting time in low-temperature environments, which not only reduces the engine's starting efficiency but also limits the scope of application of vehicle-mounted generating systems. This invention provides a vehicle-mounted starting and generating control method and system that is compatible with mains power and supports both AC and DC power. It realizes the function of outputting AC and DC power and being compatible with mains power. In mains power mode, the size and weight of the generating module can be reduced by multiplexing LC filters. This not only eliminates the need for the engine's starter motor but also allows the engine to be started directly by a permanent magnet generator, further reducing the weight and size of the generating module. At the same time, the starting and generating switching control strategy can realize a smooth switching between engine starting and generating power, improving the engine starting speed.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A dual-power AC / DC vehicle-mounted starting and generating control method compatible with mains power includes the following steps:

[0007] Step A: Construct an AC / DC dual-use vehicle-mounted starting and generating module;

[0008] Step B: During the engine start-up phase, the AC / DC dual-purpose vehicle starter generator uses the power battery to provide energy to the permanent magnet generator via the inverter unit. The permanent magnet generator then converts the DC power into mechanical energy to start the engine and tow the engine to idle speed.

[0009] Step C: During the generator set generation phase, the AC / DC dual-purpose vehicle-mounted starting and generating module converts the variable-voltage and variable-frequency AC power output from the permanent magnet generator into DC power through the rectifier unit to charge the power battery, and then converts the DC power into constant-voltage and constant-frequency AC power through the inverter unit before outputting it.

[0010] Step D involves using an AC / DC dual-purpose vehicle-mounted starting and generating module to rectify the AC mains power into DC power through a rectifier unit during the mains power operation phase, thereby charging the power battery. The mains power is then directly output as AC power.

[0011] The aforementioned AC / DC dual-use vehicle starting and power generation control method compatible with mains power includes step A, which involves constructing an AC / DC dual-use vehicle starting and power generation module. The AC / DC dual-use vehicle starting and power generation module consists of an engine, a permanent magnet generator, contactors R1, R2, R3, and R4, a rectifier unit, an inverter unit, a filter, a mains power input port, an AC output port, and a power battery.

[0012] The aforementioned AC / DC dual-use vehicle starting and power generation control method compatible with mains power, in step B, utilizes the AC / DC dual-use vehicle starting and power generation module to provide energy from the power battery to the permanent magnet generator via an inverter unit during the engine starting phase. The permanent magnet generator then converts the DC electrical energy into mechanical energy to start the engine and bring it to idle speed. Specifically, this involves closing contactors R1 and R2, and the power battery providing energy to the permanent magnet generator via the inverter unit. The detailed steps are as follows:

[0013] Step B1, set the engine idle speed command n ref and engine speed feedback n fdb The difference between the two values ​​is calculated to obtain the first difference value, which is then input to the speed regulator. The speed regulator then operates and outputs the q-axis current command i. qref1 ;

[0014] Step B2, for the q-axis current command i qref1 and current feedback i qfdb1 The difference between the two values ​​is calculated to obtain a second difference value, which is then input to the current regulator. The current regulator then runs and outputs the q-axis voltage command u. q1 ;

[0015] Step B3, for the d-axis current command idref1 With d-axis current feedback i dfdb1 The difference between the two values ​​is calculated to obtain a third difference value, which is then input to the current regulator. The current regulator then runs and outputs the d-axis voltage command u. d1 ;

[0016] Step B4, for the q-axis voltage command u q1 and d-axis voltage command u d1 Perform space voltage vector modulation and output the drive signal for the switching transistor.

[0017] The aforementioned AC / DC dual-use vehicle starting and generating control method compatible with mains power, in step B, involves the q-axis current command i during generator starting. qref1 This is the output of the speed regulator, and after the engine starts successfully, the q-axis current command i... qref1 When the current is 0, the permanent magnet generator does not output torque and uses zero-current control. Then, when the engine accelerates to the generator speed, the q-axis current command i... qref1 This is the output of the voltage regulator.

[0018] The aforementioned AC / DC dual-purpose vehicle starting and generating control method compatible with mains power, in step C, uses an AC / DC dual-purpose vehicle starting and generating module to convert the variable-voltage, variable-frequency AC power output from the permanent magnet generator into DC power through a rectifier unit to charge the power battery. Then, the DC power is converted into constant-voltage, constant-frequency AC power through an inverter unit before being output. Specifically, contactors R1 and R2 are closed, and the variable-voltage, variable-frequency AC power output from the permanent magnet generator is converted into DC power through a rectifier unit to charge the power battery. The specific steps are as follows:

[0019] Step C1, issue a voltage command u to the power battery. ref and power battery voltage feedback u fdb The difference between the two values ​​is calculated to obtain a fourth difference value, which is then input into the voltage regulator. The voltage regulator then runs and outputs the q-axis current command i. qref2 ;

[0020] Step C2, for the q-axis current command i qref2 and current feedback i qfdb2 The difference between the two values ​​is calculated to obtain a fifth difference value, which is then input to the current regulator. The current regulator then runs and outputs the q-axis voltage command u. q2 ;

[0021] Step C3, for the d-axis current command i dref2 With d-axis current feedback i dfdb2 The difference between the two values ​​is calculated to obtain the sixth difference value, which is then input to the current regulator. The current regulator then runs and outputs the d-axis voltage command u. d2 ;

[0022] Step C4, for the q-axis voltage command u q2 and d-axis voltage command u d2 Perform space voltage vector modulation and output the drive signal for the switching transistor.

[0023] In the aforementioned AC / DC dual-use vehicle starting and generating control method compatible with mains power, step D involves using the AC / DC dual-use vehicle starting and generating module to rectify the AC mains power into DC power through a rectifier unit during mains power operation to charge the power battery, and then directly outputting the mains power as AC output energy. Specifically, this involves disconnecting contactor R1, closing contactor R2, and closing contactor R3. The specific operation process of the rectifier unit in rectifying the AC mains power into DC power to charge the power battery is the same as the specific operation process of the rectifier unit in converting the variable frequency AC power output from the permanent magnet generator into DC power to charge the power battery.

[0024] A dual-purpose AC / DC vehicle-mounted starter-generator control system compatible with mains power includes a generator module construction module, an engine starting module, a generator set module, and a mains power operation module. The generator module construction module is used to construct the dual-purpose AC / DC vehicle-mounted starter-generator module. The engine starting module utilizes the dual-purpose AC / DC vehicle-mounted starter-generator module to provide energy from the power battery to a permanent magnet generator via an inverter unit during the engine starting phase. The permanent magnet generator then converts the DC power into mechanical energy to start the engine and bring it to idle speed. The generator set module uses the dual-purpose AC / DC vehicle-mounted starter-generator module to convert the variable-voltage, variable-frequency AC power output from the permanent magnet generator into DC power via a rectifier unit to charge the power battery. The DC power is then converted back into constant-voltage, constant-frequency AC power via an inverter unit for output. The mains power operation module utilizes the dual-purpose AC / DC vehicle-mounted starter-generator module to rectify AC mains power into DC power via a rectifier unit during the mains power operation phase to charge the power battery. The mains power is then directly output as AC power.

[0025] The beneficial effects of this invention are as follows: This invention provides a dual-power AC / DC vehicle-mounted starting and generating control method and system compatible with mains power. First, a dual-power AC / DC vehicle-mounted starting and generating module is constructed. Then, during the engine starting phase, the dual-power AC / DC vehicle-mounted starting and generating module uses an inverter unit to provide energy from the power battery to a permanent magnet generator. The permanent magnet generator then converts the DC power into mechanical energy to start the engine and bring it to idle speed. Subsequently, during the generator generation phase, the dual-power AC / DC vehicle-mounted starting and generating module uses a rectifier unit to convert the variable-voltage, variable-frequency AC power output from the permanent magnet generator into DC power to charge the power battery. The DC power is then converted back into constant-voltage, constant-frequency AC power by an inverter unit before being output. Finally, during the mains power operation phase, the dual-power AC / DC vehicle-mounted starting and generating module is used... The system rectifies AC mains power into DC power via a rectifier unit to charge the power battery, and then directly outputs AC power as AC output energy. This effectively realizes that the AC / DC dual-use vehicle starting and generating control method and system can output AC and DC power and is compatible with mains power. In mains power mode, the size and weight of the generating module can be reduced by multiplexing LC filters. This not only eliminates the need for an engine starter motor, but also allows the engine to be started directly using a permanent magnet generator, further reducing the weight and size of the generating module. At the same time, the starting and generating switching control strategy can achieve a smooth switch between engine starting and generating power, and also enables low-temperature engine starting while reducing engine size and weight, improving the engine starting speed. It has broad application prospects. Attached Figure Description

[0026] Figure 1 This is an overall architecture diagram of the AC / DC dual-purpose vehicle-mounted starting and generating module of the present invention;

[0027] Figure 2 This is a schematic diagram of the AC / DC dual-purpose vehicle-mounted starting and generating module of the present invention during the engine starting phase;

[0028] Figure 3 This is a schematic diagram of the working principle of the inverter unit during the engine start-up phase of the present invention;

[0029] Figure 4 This is a flowchart of the power generation control during the engine start-up phase of the present invention;

[0030] Figure 5 This is a schematic diagram of the engine switching control principle during the engine start-up phase of the present invention;

[0031] Figure 6 This is a schematic diagram of the AC / DC dual-purpose vehicle-mounted starting and generating module of the present invention during the generator unit's power generation stage;

[0032] Figure 7 This is a schematic diagram illustrating the working principle of the rectifier unit during the power generation stage of the present invention;

[0033] Figure 8 This is a flowchart of the power generation control process during the power generation phase of the present invention;

[0034] Figure 9 This is a schematic diagram of the AC / DC dual-use vehicle-mounted starting and generating module of the present invention during the mains power operation phase. Detailed Implementation

[0035] The present invention will now be further described with reference to the accompanying drawings.

[0036] like Figure 1 As shown, the present invention provides a dual-power AC / DC vehicle starting and generating control method compatible with mains power, comprising the following steps:

[0037] Step A: Construct an AC / DC dual-purpose vehicle-mounted starting and generating module, which consists of an engine, a permanent magnet generator, contactors R1, R2, R3, and R4, a rectifier unit, an inverter unit, a filter, a mains input port, an AC output port, and a power battery.

[0038] like Figure 2-4 As shown, in step B, the AC / DC dual-purpose vehicle starter generator module provides energy from the power battery to the permanent magnet generator via the inverter unit during the engine start-up phase. The permanent magnet generator then converts the DC electrical energy into mechanical energy to start the engine and bring it to idle speed. Specifically, this involves closing contactors R1 and R2, and the power battery providing energy to the permanent magnet generator via the inverter unit. The detailed steps are as follows:

[0039] Step B1, set the engine idle speed command n ref and engine speed feedback n fdb The difference between the two values ​​is calculated to obtain the first difference value, which is then input to the speed regulator. The speed regulator then operates and outputs the q-axis current command i. qref1 ;

[0040] Step B2, for the q-axis current command i qref1 and current feedback i qfdb1 The difference between the two values ​​is calculated to obtain a second difference value, which is then input to the current regulator. The current regulator then runs and outputs the q-axis voltage command u. q1 ;

[0041] Step B3, for the d-axis current command i dref1 With d-axis current feedback i dfdb1 The difference between the two values ​​is calculated to obtain a third difference value, which is then input to the current regulator. The current regulator then runs and outputs the d-axis voltage command u. d1 ;

[0042] Step B4, for the q-axis voltage command uq1 and d-axis voltage command u d1 Perform space voltage vector modulation and output the drive signal for the switching transistor.

[0043] like Figure 5 As shown, during the generator startup process in step B, the q-axis current command i qref1 This is the output of the speed regulator, and after the engine starts successfully, the q-axis current command i... qref1 When the current is 0, the permanent magnet generator does not output torque and uses zero-current control. Then, when the engine accelerates to the generator speed, the q-axis current command i... qref1 This is the output of the voltage regulator.

[0044] like Figure 6-8 As shown, in step C, the AC / DC dual-purpose vehicle-mounted starting generator module converts the variable-voltage, variable-frequency AC power output from the permanent magnet generator into DC power via a rectifier unit to charge the power battery. Then, the DC power is converted back into constant-voltage, constant-frequency AC power via an inverter unit before being output. Specifically, contactors R1 and R2 are closed, and the variable-voltage, variable-frequency AC power output from the permanent magnet generator is converted into DC power via a rectifier unit to charge the power battery. The specific steps are as follows:

[0045] Step C1, issue a voltage command u to the power battery. ref and power battery voltage feedback u fdb The difference between the two values ​​is calculated to obtain a fourth difference value, which is then input into the voltage regulator. The voltage regulator then runs and outputs the q-axis current command i. qref2 ;

[0046] Step C2, for the q-axis current command i qref2 and current feedback i qfdb2 The difference between the two values ​​is calculated to obtain a fifth difference value, which is then input to the current regulator. The current regulator then runs and outputs the q-axis voltage command u. q2 ;

[0047] Step C3, for the d-axis current command i dref2 With d-axis current feedback i dfdb2 The difference between the two values ​​is calculated to obtain the sixth difference value, which is then input to the current regulator. The current regulator then runs and outputs the d-axis voltage command u. d2 ;

[0048] Step C4, for the q-axis voltage command u q2 and d-axis voltage command u d2 Perform space voltage vector modulation and output the drive signal for the switching transistor.

[0049] like Figure 9As shown, in step D, the AC / DC dual-purpose vehicle-mounted starting generator module rectifies the AC mains power into DC power to charge the power battery during the mains power operation phase, and then directly outputs the mains power as AC output energy. Specifically, contactor R1 is opened, contactor R2 is closed, and contactor R3 is closed. The specific operation process of the rectifier unit in converting the AC mains power into DC power to charge the power battery is the same as the specific operation process of the rectifier unit in converting the variable frequency AC power output from the permanent magnet generator into DC power to charge the power battery.

[0050] A dual-purpose AC / DC vehicle-mounted starter-generator control system compatible with mains power includes a generator module construction module, an engine starting module, a generator set module, and a mains power operation module. The generator module construction module is used to construct the dual-purpose AC / DC vehicle-mounted starter-generator module. The engine starting module utilizes the dual-purpose AC / DC vehicle-mounted starter-generator module to provide energy from the power battery to a permanent magnet generator via an inverter unit during the engine starting phase. The permanent magnet generator then converts the DC power into mechanical energy to start the engine and bring it to idle speed. The generator set module uses the dual-purpose AC / DC vehicle-mounted starter-generator module to convert the variable-voltage, variable-frequency AC power output from the permanent magnet generator into DC power via a rectifier unit to charge the power battery. The DC power is then converted back into constant-voltage, constant-frequency AC power via an inverter unit for output. The mains power operation module utilizes the dual-purpose AC / DC vehicle-mounted starter-generator module to rectify AC mains power into DC power via a rectifier unit during the mains power operation phase to charge the power battery. The mains power is then directly output as AC power.

[0051] In summary, the present invention provides a dual-power AC / DC vehicle starting and power generation control method and system compatible with mains power. First, a dual-power AC / DC vehicle starting and power generation module is constructed. Then, during the engine starting phase, the module uses an inverter unit to supply energy from the power battery to a permanent magnet generator. The permanent magnet generator then converts the DC power into mechanical energy to start the engine and bring it to idle speed. Subsequently, during the generator generation phase, the dual-power AC / DC vehicle starting and power generation module uses a rectifier unit to convert the variable-voltage, variable-frequency AC power output from the permanent magnet generator into DC power to charge the power battery. The DC power is then converted back into constant-voltage, constant-frequency AC power by an inverter unit before being output. Finally, the dual-power AC / DC vehicle starting and power generation system is utilized. During mains power operation, the module rectifies the AC mains power into DC power through a rectifier unit to charge the power battery, and then directly outputs the mains power as AC output power. This effectively realizes that the AC / DC dual-use vehicle starting and power generation control method and system can output AC and DC power and is compatible with mains power. In mains power mode, the size and weight of the power generation module can be reduced by multiplexing the LC filter. This not only eliminates the need for the engine starter, but also allows the engine to be started directly by a permanent magnet generator, further reducing the weight and size of the power generation module. At the same time, the starting and power generation switching control strategy can achieve a smooth switch between engine starting and power generation, and also enables low-temperature engine starting while reducing engine size and weight.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-power AC / DC vehicle-mounted starting and generating control method compatible with mains power, characterized in that: Includes the following steps, Step A: Construct an AC / DC dual-use vehicle-mounted starting and generating module; Step B: During the engine start-up phase, the AC / DC dual-purpose vehicle starter generator uses the power battery to provide energy to the permanent magnet generator via the inverter unit. The permanent magnet generator then converts the DC power into mechanical energy to start the engine and tow the engine to idle speed. Step C: During the generator set generation phase, the AC / DC dual-purpose vehicle-mounted starting and generating module converts the variable-voltage and variable-frequency AC power output from the permanent magnet generator into DC power through the rectifier unit to charge the power battery, and then converts the DC power into constant-voltage and constant-frequency AC power through the inverter unit before outputting it. Step D involves using an AC / DC dual-purpose vehicle-mounted starting and generating module to rectify the AC mains power into DC power through a rectifier unit during the mains power operation phase, thereby charging the power battery. The mains power is then directly output as AC power.

2. The AC / DC dual-use vehicle starting and generating control method compatible with mains power as described in claim 1, characterized in that: Step A: Construct an AC / DC dual-purpose vehicle-mounted starting and generating module, which consists of an engine, a permanent magnet generator, contactors R1, R2, R3, and R4, a rectifier unit, an inverter unit, a filter, a mains input port, an AC output port, and a power battery.

3. The AC / DC dual-use vehicle starting and generating control method compatible with mains power as described in claim 2, characterized in that: Step B involves using an AC / DC dual-purpose vehicle starter generator module to supply energy from the power battery to the permanent magnet generator via an inverter unit during the engine start-up phase. The permanent magnet generator then converts the DC electrical energy into mechanical energy to start the engine and bring it to idle speed. Specifically, this involves closing contactors R1 and R2 and supplying energy from the power battery to the permanent magnet generator via the inverter unit. The detailed steps are as follows: Step B1, set the engine idle speed command n ref and engine speed feedback n fdb The difference between the two values ​​is calculated to obtain the first difference value, which is then input to the speed regulator. The speed regulator then operates and outputs the q-axis current command i. qref1 ; Step B2, for the q-axis current command i qref1 and current feedback i qfdb1 The difference between the two values ​​is calculated to obtain a second difference value, which is then input to the current regulator. The current regulator then runs and outputs the q-axis voltage command u. q1 ; Step B3, for the d-axis current command i dref1 With d-axis current feedback i dfdb1 The difference between the two values ​​is calculated to obtain a third difference value, which is then input to the current regulator. The current regulator then runs and outputs the d-axis voltage command u. d1 ; Step B4, for the q-axis voltage command u q1 and d-axis voltage command u d1 Perform space voltage vector modulation and output the drive signal for the switching transistor.

4. The AC / DC dual-use vehicle starting and generating control method compatible with mains power according to claim 3, characterized in that: In step B, during generator startup, the q-axis current command i qref1 This is the output of the speed regulator, and after the engine starts successfully, the q-axis current command i... qref1 When the current is 0, the permanent magnet generator does not output torque and uses zero-current control. Then, when the engine accelerates to the generator speed, the q-axis current command i... qref1 This is the output of the voltage regulator.

5. The AC / DC dual-use vehicle starting and generating control method compatible with mains power according to claim 2, characterized in that: Step C involves using an AC / DC dual-purpose vehicle-mounted starting and generating module. During the generator's power generation phase, the AC power output from the permanent magnet generator is rectified into DC power by a rectifier unit to charge the power battery. Then, the DC power is converted back into constant voltage and constant frequency AC power by an inverter unit before being output. Specifically, contactors R1 and R2 are closed, and the AC power output from the permanent magnet generator is rectified into DC power by a rectifier unit to charge the power battery. The detailed steps are as follows: Step C1, issue a voltage command u to the power battery. ref and power battery voltage feedback u fdb The difference between the two values ​​is calculated to obtain a fourth difference value, which is then input into the voltage regulator. The voltage regulator then runs and outputs the q-axis current command i. qref2 ; Step C2, for the q-axis current command i qref2 and current feedback i qfdb2 The difference between the two values ​​is calculated to obtain a fifth difference value, which is then input to the current regulator. The current regulator then runs and outputs the q-axis voltage command u. q2 ; Step C3, for the d-axis current command i dref2 With d-axis current feedback i dfdb2 The difference between the two values ​​is calculated to obtain the sixth difference value, which is then input to the current regulator. The current regulator then runs and outputs the d-axis voltage command u. d2 ; Step C4, for the q-axis voltage command u q2 and d-axis voltage command u d2 Perform space voltage vector modulation and output the drive signal for the switching transistor.

6. The AC / DC dual-use vehicle starting and generating control method compatible with mains power according to claim 5, characterized in that: Step D involves using the AC / DC dual-purpose vehicle-mounted starting generator module to rectify the AC mains power into DC power to charge the power battery during the mains power operation phase. Then, the mains power is directly output as AC power. Specifically, this involves disconnecting contactor R1, closing contactor R2, and closing contactor R3. The specific operation process of the rectifier unit in converting the AC mains power into DC power to charge the power battery is the same as the specific operation process of the rectifier unit in converting the variable frequency AC power output from the permanent magnet generator into DC power to charge the power battery.

7. A dual-purpose AC / DC vehicle starter generator control system compatible with mains power, wherein the specific control process of the dual-purpose AC / DC vehicle starter generator control system is based on the dual-purpose AC / DC vehicle starter generator control method according to any one of claims 1-6, characterized in that: It includes a power generation module construction module, an engine starting module, a generator unit power generation module, and a mains power operation module. The power generation module construction module is used to construct an AC / DC dual-use vehicle-mounted starting and power generation module. The engine start module is used to use the AC / DC dual-purpose vehicle starter generator to provide energy from the power battery to the permanent magnet generator via the inverter unit during the engine start phase. The permanent magnet generator then converts the DC power into mechanical energy to start the engine and tow the engine to idle speed. The generator unit's power generation module is used to convert the variable-voltage and variable-frequency AC power output from the permanent magnet generator into DC power through the rectifier unit during the generator unit's power generation phase, and then convert the DC power into constant-voltage and constant-frequency AC power through the inverter unit before outputting it. The mains power operation module is used to use the AC / DC dual-purpose vehicle-mounted starting and generating module to rectify the AC mains power into DC power through the rectifier unit to charge the power battery during the mains power operation phase, and then directly output the mains power as AC output power.

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