Vehicle power generation system generator torque control method and electronic equipment

Abstract

The invention discloses a vehicle power generation system generator torque control method and electronic equipment. The method comprises the steps that a target rotating speed and the actual rotating speed of a generator of a power generation system are obtained, and the generator of the power generation system is driven by an engine to generate power; calculating an expected acceleration according to the target rotating speed and the actual rotating speed of the generator; calculating the actual acceleration of the generator according to the actual rotating speed of the generator; performing proportional-integral control according to the difference value between the expected acceleration and the actual acceleration of the generator to obtain a proportional-integral output torque; and determining the output torque of the generator according to the proportional integral output torque, and controlling the generator based on the output torque of the generator. According to the invention, PI control is carried out through the difference value of the acceleration, and when the unexpected acceleration change of the system occurs, real-time response and suppression of the fluctuation of the system can be realized, and the control stability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-related technologies, and in particular to a generator torque control method, electronic equipment, storage medium and computer program product of a vehicle power generation system. Background Art

[0002] In the prior art, the generator receives the required speed command of the vehicle to control the speed of the power generation system (generator + engine), and the generator speed is PI controlled based on the difference between the actual speed and the target speed. Figure 1 The figure shows a generator speed control system of a vehicle power generation system in the prior art, including: a gradient limiting module 1', a PI module 2' and a generator torque control module 3'. First, the vehicle speed command is limited by the gradient limiting module 1', a generator speed command is generated, and a target speed is extracted from the generator speed command. Then, based on the difference between the actual speed of the generator and the target speed as the input of the PI module 2', proportional integral (PI) control is performed to calculate the actual output torque of the generator, generate a generator torque command, and input it to the generator torque control module 3' to control the motor output torque. The actual response time is based on the gradient of the speed command change and the PI parameter control.

[0003] However, when unexpected acceleration changes occur in the system (due to external or internal influences of the power generation system), the prior art cannot respond in real time because it performs control based on the speed difference and needs to wait until the difference is large. Summary of the invention

[0004] Based on this, it is necessary to provide a vehicle power generation system generator torque control method, electronic device, storage medium and computer program product to address the technical problem that the generator speed control in the prior art is only based on the speed difference control and cannot respond to unexpected acceleration changes in real time.

[0005] The present invention provides a method for controlling torque of a generator of a vehicle power generation system, comprising:

[0006] Acquiring a target rotation speed and an actual rotation speed of a generator of a power generation system, wherein the power generation system is driven by an engine to generate electricity;

[0007] Calculating an expected acceleration according to the target speed and the actual speed of the generator;

[0008] Calculating the actual acceleration of the generator according to the actual rotation speed of the generator;

[0009] Performing proportional-integral control according to the difference between the expected acceleration and the actual acceleration of the generator to obtain a proportional-integral output torque;

[0010] A generator output torque is determined according to the proportional-integral output torque, and the generator is controlled based on the generator output torque.

[0011] Further, the calculating the expected acceleration according to the target speed and the actual speed of the generator includes:

[0012] Finding the expected response time corresponding to the difference between the target speed and the actual speed of the generator;

[0013] An expected acceleration is calculated according to the expected response time, the target rotation speed and the actual rotation speed of the generator.

[0014] Further, performing proportional-integral control according to the difference between the expected acceleration and the actual acceleration of the generator to obtain the proportional-integral output torque includes:

[0015] A proportional-integral parameter corresponding to the expected acceleration is found, and the proportional-integral parameter is used to perform proportional-integral control based on a difference between the expected acceleration and the actual acceleration of the generator.

[0016] Further, determining the generator output torque according to the proportional-integral output torque comprises:

[0017] The proportional integral output torque is corrected according to the engine feedback torque to obtain the generator output torque.

[0018] Furthermore, the proportional integral output torque is corrected according to the engine feedback torque to obtain the generator output torque, including:

[0019] calculating a feedforward load suppression torque based on the engine feedback torque;

[0020] The proportional-integral output torque is added to the feed-forward load suppression torque to obtain the generator output torque.

[0021] Further, the calculating the feedforward load suppression torque according to the engine feedback torque includes:

[0022] calculating the inertial force caused by the moment of inertia of the power generation system;

[0023] The engine feedback torque is added to the inertia force to obtain a feedforward load suppression torque.

[0024] Further, the calculating the inertial force caused by the moment of inertia of the power generation system includes:

[0025] Calculate the inertial force as:

[0026] T=j*we / dt, wherein T is the inertial force, j is the moment of inertia of the power generation system, we is the actual angular velocity of the motor determined according to the actual rotational speed of the generator, and we / dt is the actual angular acceleration of the generator.

[0027] The present invention provides an electronic device, comprising:

[0028] at least one processor; and,

[0029] a memory communicatively connected to at least one of the processors; wherein,

[0030] The memory stores instructions that can be executed by at least one of the processors. The instructions are executed by at least one of the processors to enable the at least one of the processors to perform the vehicle power generation system generator torque control method as described above.

[0031] The present invention provides a storage medium, wherein the storage medium stores computer instructions. When a computer executes the computer instructions, the storage medium is used to execute all steps of the above-mentioned vehicle power generation system generator torque control method.

[0032] The present invention provides a computer program product, comprising a computer program / instruction, which, when executed by a processor, implements the above-mentioned method for controlling the torque of a generator of a vehicle power generation system.

[0033] The present invention performs PI control through the difference of acceleration, and can respond in real time when unexpected acceleration changes occur in the system, thereby suppressing fluctuations of the system and improving control stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of a generator speed control system of a vehicle power generation system in the prior art;

[0035] Figure 2 This is a working diagram of a method for controlling a generator torque of a vehicle power generation system according to an embodiment of the present invention;

[0036] Figure 3 This is a working flow chart of a generator torque control method of a vehicle power generation system according to another embodiment of the present invention;

[0037] Figure 4 A simplified schematic diagram of the vehicle's power generation system;

[0038] Figure 5 A module diagram of a generator torque control system of a vehicle power generation system according to a preferred embodiment of the present invention;

[0039] Figure 6 A schematic diagram of a generator torque control method for a vehicle power generation system according to a preferred embodiment of the present invention;

[0040] Figure 7 The figure is a schematic diagram of the hardware structure of an electronic device of the present invention. DETAILED DESCRIPTION

[0041] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. The same components are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0042] like Figure 2 The figure is a working flow chart of a method for controlling the torque of a generator of a vehicle power generation system according to an embodiment of the present invention, comprising:

[0043] Step S201, obtaining a target speed and an actual speed of a generator of a power generation system, wherein the power generation system is driven by an engine to generate electricity;

[0044] Step S202, calculating the expected acceleration according to the target speed and the actual speed of the generator;

[0045] Step S203, calculating the actual acceleration of the generator according to the actual rotation speed of the generator;

[0046] Step S204, performing proportional-integral control according to the difference between the expected acceleration and the actual acceleration of the generator to obtain a proportional-integral output torque;

[0047] Step S205 , determining the generator output torque according to the proportional-integral output torque, and controlling the generator based on the generator output torque.

[0048] Specifically, the present invention can be applied to electronic devices with processing capabilities, such as a controller of a vehicle, such as an electronic control unit (ECU) of a vehicle, and preferably, applied to a generator controller of a generator.

[0049] The generator torque control method of the vehicle power generation system of the present invention determines the generator output torque at fixed cycle time intervals.

[0050] First, step S201 is executed to obtain a target rotation speed and an actual rotation speed of a generator of a power generation system, wherein the power generation system is a power generation system in which an engine drives a generator to generate electricity.

[0051] Specifically, the present invention provides a torque control of a generator of a vehicle power generation system. The power generation system includes an engine and a generator. Figure 4As shown, the generator (GEN) 41 receives the vehicle speed command, and the engine (ENG) 42 receives the vehicle torque command. The generator 41 and the engine 42 are connected via a reducer 43. Through gear transmission, the speed / torque of the engine 42 and the generator 41 present a speed ratio relationship. The engine 42 controls its torque output based on the vehicle demand. In the normal working mode, the generator 41 outputs torque based on the vehicle speed demand through the speed control algorithm to control the speed of the entire power generation system.

[0052] The target speed is extracted from the vehicle speed command provided by the vehicle. The generator will collect the current motor electrical angle based on the resolver sensor, and the actual generator speed can be calculated based on the change in the motor electrical angle.

[0053] Then, step S202 is executed to calculate the expected acceleration according to the target speed and the actual speed of the generator.

[0054] Specifically, the expected response time is determined first, and then the expected acceleration is calculated based on the expected response time, the target speed, and the actual speed of the generator. When the vehicle speed command changes, there is a deviation from the actual speed of the generator. The expected response time is the actual expected response time for the actual speed of the generator to reach the target speed.

[0055] Specifically, the expected acceleration is calculated as a 预期 =(v 目标 -v 实际 ) / t 预期 , where a 预期 is the expected acceleration, v 目标 is the target speed, v 实际 is the actual speed of the generator in this cycle, t 预期 is the expected response time.

[0056] Then, step S203 is executed to calculate the actual acceleration of the generator according to the actual rotation speed of the generator.

[0057] Specifically, the generator will collect the current motor electrical angle based on the resolver sensor, and the speed can be calculated based on the change in the motor electrical angle. The actual acceleration can be calculated based on the actual generator speed of the current cycle and the actual generator speed and cycle time of the previous cycle.

[0058] Specifically, the actual acceleration is calculated as a 实际 =(v 实际 -v 上周期 ) / t 周期 , where a 预期 is the expected acceleration, v 实际 is the actual speed of the generator in this cycle, v 上周期is the actual speed of the generator in the previous cycle, t 周期 For the cycle time.

[0059] Then, step S204 is executed to perform proportional-integral control according to the difference between the expected acceleration and the actual acceleration of the generator to obtain a proportional-integral output torque.

[0060] Specifically, a proportional-integral (PI) control method in the prior art may be used to perform PI control according to the difference between the expected acceleration and the actual acceleration of the generator to obtain a proportional-integral output torque.

[0061] Finally, step S205 is executed to determine the generator output torque according to the proportional-integral output torque, and control the generator based on the generator output torque.

[0062] Specifically, the actual torque command can be output based on the generator output torque. The generator controller adopts the existing technology to obtain the control current based on the actual torque command, control the corresponding output torque of the generator, and control the speed change of the entire power generation system.

[0063] Since PI control is performed through acceleration, when the system experiences unexpected acceleration changes (external or internal influences of the power generation system), it can respond in real time, suppress system fluctuations, and improve control stability. The existing technology is only based on speed difference, and this part of the change will be very small, and it needs to wait until the deviation is large before responding. The present invention can significantly improve the control stability under this working condition.

[0064] The present invention performs PI control through the difference in acceleration, and can respond in real time when unexpected acceleration changes occur in the system (external or internal influence of the power generation system), thereby suppressing fluctuations in the system and improving control stability.

[0065] like Figure 3 The flowchart of a method for controlling the torque of a generator of a vehicle power generation system in another embodiment of the present invention includes:

[0066] Step S301, obtaining a target rotation speed and an actual rotation speed of a generator of a power generation system, wherein the power generation system is a power generation system in which an engine drives a generator to generate electricity.

[0067] Step S302, finding the expected response time corresponding to the difference between the target speed and the actual speed of the generator.

[0068] Step S303: calculating the expected acceleration according to the expected response time, the target speed and the actual speed of the generator.

[0069] Step S304, calculating the actual acceleration of the generator according to the actual rotation speed of the generator.

[0070] Step S305, searching for a proportional-integral parameter corresponding to the expected acceleration, using the proportional-integral parameter, and performing proportional-integral control based on a difference between the expected acceleration and the actual acceleration of the generator.

[0071] Step S306: correcting the proportional integral output torque according to the engine feedback torque to obtain the generator output torque.

[0072] In one embodiment, the proportional integral output torque is corrected according to the engine feedback torque to obtain the generator output torque, including:

[0073] calculating a feedforward load suppression torque based on the engine feedback torque;

[0074] The proportional-integral output torque is added to the feed-forward load suppression torque to obtain the generator output torque.

[0075] In one embodiment, the calculating the feedforward load suppression torque according to the engine feedback torque comprises:

[0076] calculating the inertial force caused by the moment of inertia of the power generation system;

[0077] The engine feedback torque is added to the inertia force to obtain a feedforward load suppression torque.

[0078] In one embodiment, the calculating the inertial force caused by the moment of inertia of the power generation system comprises:

[0079] Calculate the inertial force as:

[0080] T=j*we / dt, wherein T is the inertial force, j is the moment of inertia of the power generation system, we is the actual angular velocity of the motor determined according to the actual rotational speed of the generator, and we / dt is the actual angular acceleration of the generator.

[0081] Step S307: controlling the generator based on the generator output torque.

[0082] Specifically, this embodiment extracts the deviation between the target speed and the actual speed based on the vehicle speed command, obtains the calibrated expected response time by looking up the table, takes the expected response time and the target speed as input, calculates the difference between the expected acceleration and the actual acceleration, performs PI control based on the acceleration of the generator, and calculates the actual torque that the generator needs to output. The output generator output torque is input to the torque control module implemented in the prior art to control the motor output torque.

[0083] At the same time, this embodiment takes into account the impact of load changes, and uses the inertial force caused by the rotational inertia of the power generation system and the engine feedback torque as feedforward to improve the response speed.

[0084] Specifically, step S301 is first performed to obtain a target rotation speed and an actual rotation speed of a generator of a power generation system, wherein the power generation system is a power generation system in which an engine drives a generator to generate electricity.

[0085] Then, step S302 is executed to find the expected response time corresponding to the difference between the target speed and the actual speed of the generator.

[0086] Specifically, when the vehicle speed command changes, there is a deviation from the actual speed of the generator, and a certain response time is required for the actual speed of the generator to change to the target speed indicated by the vehicle speed command. In the prior art, the actual speed response time can only be controlled based on the gradient of the speed command change, and there is a certain overshoot fluctuation phenomenon in the speed response during the speed regulation process. However, this embodiment sets the required response time based on the expected deviation between the target speed and the actual speed of the generator. The specific implementation method is to look up the table based on the different speed differences (referred to as: speed difference) between the target speed and the actual speed of the generator to obtain the actual expected response time corresponding to the speed difference. The higher the speed difference that needs to be changed, the higher the expected response time actually required. As the speed difference becomes smaller, the expected response time will also become smaller. The expected response time corresponding to the specific difference between the target speed and the actual speed of the generator is obtained through actual calibration.

[0087] Then, step S303 is executed to calculate the expected acceleration according to the expected response time, the target speed and the actual speed of the generator.

[0088] Specifically, after the expected response time is determined, the expected acceleration can be calculated based on the expected response time and the difference between the target speed and the actual speed of the generator.

[0089] Then, step S304 is executed to calculate the actual acceleration of the generator according to the actual rotation speed of the generator.

[0090] Specifically, the generator will collect the current motor electrical angle based on the resolver sensor, and the speed can be calculated based on the change in the motor electrical angle. The actual acceleration can be calculated based on the actual generator speed of the current cycle and the actual generator speed and cycle time of the previous cycle.

[0091] Then, step S305 is executed to find the proportional-integral parameter corresponding to the expected acceleration, and the proportional-integral parameter is used to perform proportional-integral control based on the difference between the expected acceleration and the actual acceleration of the generator.

[0092] Specifically, appropriate PI parameters are obtained by looking up the table based on the expected acceleration, and the PI parameters include proportional parameters and integral parameters. The PI parameters are obtained through actual calibration and are determined based on the performance of the actual power generation system when the operating point changes, such as steady-state control error, speed overshoot during step, etc.

[0093] After the corresponding proportional integral parameter is found, the difference between the expected acceleration and the actual acceleration of the generator is input as an error into the PI module implemented by the prior art, and proportional integral control is performed. The output torque of the PI module is calculated based on the incremental PI formula of the prior art as the proportional integral output torque. The proportional integral control adopts the existing proportional integral control method.

[0094] Then, step S306 is executed to correct the proportional integral output torque according to the engine feedback torque to obtain the generator output torque.

[0095] Specifically, the engine feedback torque of the engine is the actual engine feedback of its current output torque, which can be obtained through a controller area network (CAN) message sent by the engine.

[0096] In one embodiment, the proportional integral output torque is corrected according to the engine feedback torque to obtain the generator output torque, including:

[0097] calculating a feedforward load suppression torque based on the engine feedback torque;

[0098] The proportional-integral output torque is added to the feed-forward load suppression torque to obtain the generator output torque.

[0099] Specifically, the feedforward load suppression torque is first calculated according to the engine feedback torque, and then the proportional integral output torque calculated by the PI module is added to the feedforward load suppression torque to obtain the generator output torque.

[0100] For the generator, the load is behind the output end. The generator needs to overcome the torque after the load to adjust the speed. Therefore, this embodiment uses the load torque as feedforward to compensate the torque in advance, so that the control fluctuation when the load end changes is smaller, thereby improving the stability and response speed when the load changes.

[0101] In one embodiment, the calculating the feedforward load suppression torque according to the engine feedback torque comprises:

[0102] calculating the inertial force caused by the moment of inertia of the power generation system;

[0103] The engine feedback torque is added to the inertia force to obtain a feedforward load suppression torque.

[0104] Specifically, the moment of inertia of the power generation system is the moment of inertia of the entire power generation system, including the moment of inertia of the engine, the generator and the transmission system.

[0105] Then the engine feedback torque is added to the inertial force (resistance) based on acceleration to calculate the feedforward load suppression torque, which is used as the feedforward of the PI output and superimposed with the PI output torque to obtain the current generator output torque.

[0106] In one embodiment, the calculating the inertial force caused by the moment of inertia of the power generation system comprises:

[0107] Calculate the inertial force as:

[0108] T=j*we / dt, wherein T is the inertial force, j is the moment of inertia of the power generation system, we is the actual angular velocity of the motor determined according to the actual rotational speed of the generator, and we / dt is the actual angular acceleration of the generator.

[0109] Finally, step S307 is executed to control the generator based on the generator output torque.

[0110] Specifically, the actual torque command can be output based on the generator output torque. The generator controller adopts the existing technology, obtains the corresponding control current based on the actual torque command, controls the corresponding output torque of the generator, and controls the speed change of the entire power generation system.

[0111] The present invention performs PI control through the difference in acceleration, and can respond in real time when unexpected acceleration changes occur in the system (external or internal influence of the power generation system), thereby suppressing fluctuations in the system and improving control stability.

[0112] In addition, this embodiment uses the target speed and expected response time as inputs to control the target response time. Compared with the change of the speed command target controlled by gradient, the response time is controllable and the control stability is improved. Too fast will cause jitter, and too slow will affect the noise, vibration and harshness (NVH) performance in the resonance range, causing NVH instability and deterioration of NVH performance.

[0113] At the same time, this embodiment performs PI control based on the acceleration of the instruction, and can perform actual PI parameter table lookup through acceleration. When the required acceleration is large, the PI parameter can be appropriately increased to make the speed response faster. When the acceleration is small, a smaller PI parameter can be used to make the torque change smaller and make the system control more stable.

[0114] Finally, this embodiment uses load torque as feedforward, adopts the parameters with relatively large influence for calculation, and compensates the torque in advance, so that the control fluctuation when the load end changes is smaller, and improves the stability and response speed when the load changes.

[0115] like Figure 5 The module diagram of a generator torque control system of a vehicle power generation system according to the best embodiment of the present invention is shown, comprising: an expected acceleration calculation module 501, a PI module 502, a feedforward load suppression module 503, an adder 504 and a generator torque control module 505, wherein:

[0116] The expected acceleration calculation module 501 receives the vehicle speed command and the actual speed of the generator, calculates and outputs the expected acceleration;

[0117] The PI module 502 receives the actual acceleration and expected acceleration of the generator, performs PI control, and outputs a PI output torque;

[0118] The feedforward load suppression module 503 receives the actual speed of the generator and the engine system parameters, and outputs the feedforward load suppression torque;

[0119] The adder 504 receives the PI output torque and the feedforward load suppression torque, adds the two together and then outputs a generator torque command;

[0120] The generator torque control module 505 receives the generator torque command, obtains the control current based on the generator torque command, controls the corresponding output torque of the generator, and controls the speed change of the entire power generation system.

[0121] In some embodiments, the vehicle power generation system generator torque control system may also include a response time table lookup module 506 for looking up the expected response time, an actual acceleration calculation module 507 for calculating the actual acceleration, and a limiting module 508 for limiting the amplitude to prevent integral saturation.

[0122] like Figure 6 The figure is a schematic diagram of a torque control method of a generator of a vehicle power generation system according to a preferred embodiment of the present invention, comprising:

[0123] Step S601, receiving a vehicle speed command and an actual generator speed, searching a response time table lookup module 506 for a corresponding expected response time according to a speed difference between a target speed in the vehicle speed command and an actual generator speed, and calculating an expected acceleration according to the expected response time, the target speed and the actual generator speed;

[0124] Step S602, based on the target speed of the vehicle speed command and the expected response time, the expected acceleration calculation module 501 performs expected acceleration calculation to obtain the expected acceleration;

[0125] Step S603, according to the expected acceleration, a PI parameter is determined by looking up a table and inputted into the PI module 502;

[0126] Step S604, inputting the actual speed of the generator into the actual acceleration calculation module 507, performing actual acceleration calculation, and obtaining the actual acceleration;

[0127] Step S605, subtract the actual acceleration from the expected acceleration, and input the error into the PI module 502, the PI module 502 uses the input PI parameters to perform PI control, and outputs a PI output torque;

[0128] Step S606, inputting the rotational inertia of the power generation system and the actual acceleration into the feedforward load suppression module 503, performing acceleration-based resistance calculation, and obtaining the inertial force T=j*we / dt;

[0129] Step S607, adding the generator feedback torque to the inertia force to obtain the feedforward load suppression torque;

[0130] Step S608, the PI output torque and the feedforward load suppression torque are superimposed through the adder 504 to obtain the generator output torque, the generator output torque is limited by the limit module 508, and the limit needs to be limited to prevent integral saturation, and then a generator torque command including the generator output torque is generated;

[0131] Step S609, the generator torque control module 505 receives the generator torque command, obtains the control current based on the generator torque command, outputs it to the generator 41 to control the corresponding output torque of the generator, controls the speed change of the entire power generation system, and performs angle sampling of the actual speed of the generator.

[0132] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0133] like Figure 7 The figure shows a hardware structure diagram of an electronic device of the present invention, including:

[0134] at least one processor 701; and,

[0135] A memory 702 that is communicatively connected to at least one of the processors 701; wherein,

[0136] The memory 702 stores instructions that can be executed by at least one of the processors. The instructions are executed by at least one of the processors to enable the at least one of the processors to execute the vehicle power generation system generator torque control method as described above.

[0137] Figure 7 A processor 701 is taken as an example.

[0138] The electronic device may further include: an input device 703 and a display device 704 .

[0139] The processor 701, the memory 702, the input device 703 and the display device 704 may be connected via a bus or other means, and the figure takes the connection via a bus as an example.

[0140] The memory 702 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules corresponding to the vehicle power generation system generator torque control method in the embodiment of the present application, for example, Figure 2 , Figure 3 The processor 701 executes various functional applications and data processing by running the non-volatile software programs, instructions and modules stored in the memory 702, that is, the generator torque control method of the vehicle power generation system in the above embodiment is implemented.

[0141] The memory 702 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created according to the use of the vehicle power generation system generator torque control method, etc. In addition, the memory 702 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 702 may optionally include a memory remotely arranged relative to the processor 701, and these remote memories may be connected to a device for executing the vehicle power generation system generator torque control method via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0142] The input device 703 can receive user clicks and generate signal inputs related to user settings and function controls of the vehicle power generation system generator torque control method. The display device 704 can include display devices such as a display screen.

[0143] The one or more modules are stored in the memory 702 , and when executed by the one or more processors 701 , the vehicle power generation system generator torque control method in any of the above method embodiments is executed.

[0144] The present invention performs PI control through the difference in acceleration, and can respond in real time when unexpected acceleration changes occur in the system (external or internal influence of the power generation system), thereby suppressing fluctuations in the system and improving control stability.

[0145] An embodiment of the present invention provides a storage medium, wherein the storage medium stores computer instructions. When a computer executes the computer instructions, the storage medium is used to execute all steps of the above-mentioned method for controlling the torque of a generator of a vehicle power generation system.

[0146] In the context of the present disclosure, a storage medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or apparatus. The storage medium may be a machine-readable signal medium or a machine-readable storage medium. Alternatively, the storage medium may be a non-temporary computer-readable storage medium, for example, a non-temporary computer-readable storage medium may be a ROM, a random access memory (Random Access Memory, RAM), a compact disc read-only memory (Compact Disc ROM, CD-ROM), a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0147] An embodiment of the present invention provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the above-mentioned method for controlling the torque of a generator of a vehicle power generation system.

[0148] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for controlling the torque of a generator in a vehicle power generation system, characterized in that: include: Acquiring a target rotation speed and an actual rotation speed of a generator of a power generation system, wherein the power generation system is driven by an engine to generate electricity; Calculating an expected acceleration according to the target speed and the actual speed of the generator; Calculating the actual acceleration of the generator according to the actual rotation speed of the generator; Performing proportional-integral control according to the difference between the expected acceleration and the actual acceleration of the generator to obtain a proportional-integral output torque; A generator output torque is determined according to the proportional-integral output torque, and the generator is controlled based on the generator output torque.

2. The vehicle power generation system generator torque control method according to claim 1, characterized in that: The calculating the expected acceleration according to the target speed and the actual speed of the generator includes: Finding the expected response time corresponding to the difference between the target speed and the actual speed of the generator; An expected acceleration is calculated according to the expected response time, the target rotation speed and the actual rotation speed of the generator.

3. The vehicle power generation system generator torque control method according to claim 1, characterized in that: The performing proportional-integral control according to the difference between the expected acceleration and the actual acceleration of the generator to obtain the proportional-integral output torque includes: A proportional-integral parameter corresponding to the expected acceleration is found, and the proportional-integral parameter is used to perform proportional-integral control based on a difference between the expected acceleration and the actual acceleration of the generator.

4. The vehicle power generation system generator torque control method according to claim 1, characterized in that: The step of determining the generator output torque according to the proportional-integral output torque comprises: The proportional integral output torque is corrected according to the engine feedback torque to obtain the generator output torque.

5. The vehicle power generation system generator torque control method according to claim 4, characterized in that: The step of correcting the proportional integral output torque according to the engine feedback torque to obtain the generator output torque includes: calculating a feedforward load suppression torque based on the engine feedback torque; The proportional-integral output torque is added to the feed-forward load suppression torque to obtain the generator output torque.

6. The generator torque control method of a vehicle power generation system according to claim 5, characterized in that: The calculating the feedforward load suppression torque according to the engine feedback torque comprises: calculating the inertial force caused by the moment of inertia of the power generation system; The engine feedback torque is added to the inertia force to obtain a feedforward load suppression torque.

7. The generator torque control method of a vehicle power generation system according to claim 6, characterized in that: The calculating the inertial force caused by the moment of inertia of the power generation system comprises: Calculate the inertial force as: T=j*we / dt, wherein T is the inertial force, j is the moment of inertia of the power generation system, we is the actual angular velocity of the motor determined according to the actual rotational speed of the generator, and we / dt is the actual angular acceleration of the generator.

8. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to at least one of the processors; wherein, The memory stores instructions that can be executed by at least one of the processors, and the instructions are executed by at least one of the processors to enable at least one of the processors to execute the generator torque control method of the vehicle power generation system according to any one of claims 1 to 7.

9. A storage medium, characterized in that: The storage medium stores computer instructions, which, when executed by a computer, are used to execute all steps of the vehicle power generation system generator torque control method as described in any one of claims 1 to 7.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the generator torque control method of the vehicle power generation system as claimed in any one of claims 1 to 7 is implemented.

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