A hydrogen fuel cell vehicle motor phase sequence self-identification system and method

Abstract

The present invention provides a hydrogen fuel cell vehicle motor phase sequence self-identification system and method. It includes a rear motor controller, a motor, a vehicle controller, a brake pedal and an accelerator pedal; the vehicle controller is connected to the brake pedal and the accelerator pedal through a signal acquisition line; the vehicle controller, the motor and the rear motor controller are connected through a CAN communication signal line; the vehicle controller collects the depth information of the accelerator pedal and the brake pedal, controls the motor according to the driver's needs, and sends the target torque; the rear motor controller outputs the target torque, and controls the motor to execute the target torque to obtain the motor speed at the same time, and the vehicle controller obtains the motor speed information, the motor phase current information and the DC input terminal current information of the rear motor controller to identify and adjust the motor phase sequence. The system has a simple structure, low cost, high stability and reliability, and is widely applicable, has a low misjudgment rate, reliable control, and also has an instrument prompt function.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell vehicle motor detection, and in particular to a hydrogen fuel cell vehicle motor phase sequence self-identification system and method. Background Art

[0002] Due to the popularity of hydrogen fuel cell vehicles, fuel cell air compressor motors and drive motors are widely used in hydrogen fuel cell vehicles. However, due to production errors or assembly problems, the motor phase sequence is easily reversed or the motor three-phase wiring harness phase sequence is reversed. When such problems occur, it is difficult for humans to troubleshoot the problems in a timely manner, resulting in delays in production or vehicle rolloff, as well as misjudgment of vehicle failures. A phase sequence self-identification system and method are urgently needed to solve such problems. Summary of the invention

[0003] The present invention provides a hydrogen fuel cell vehicle motor phase sequence self-identification system, aiming to solve the technical problem that the reverse connection of the motor phase sequence is difficult to detect and causes vehicle failure.

[0004] In order to achieve the above-mentioned object, the present invention provides a hydrogen fuel cell vehicle motor phase sequence self-identification system, the hydrogen fuel cell vehicle motor phase sequence self-identification system comprises: a hydrogen fuel cell system, a high-voltage distribution box, a power battery system, a rear motor controller, a motor, a reducer and a differential, a vehicle controller, a brake pedal, an accelerator pedal and an instrument;

[0005] The vehicle controller is connected to the brake pedal and the accelerator pedal respectively through a signal acquisition line;

[0006] The vehicle controller, hydrogen fuel cell system, power battery system, rear motor controller, motor, and instrument are connected via a CAN communication signal line;

[0007] The high-voltage distribution box is respectively connected to the hydrogen fuel cell system, the power battery system, the rear motor controller and the motor through high-voltage wires;

[0008] The vehicle controller collects the depth information of the accelerator pedal and the brake pedal, controls the motor according to the driver's needs, and sends the target torque;

[0009] The rear motor controller outputs the target torque according to the target torque sent by the vehicle controller, and controls the motor to execute the target torque to obtain the motor speed. The vehicle controller collects the motor speed information, the motor phase current information and the DC input terminal current information of the rear motor controller; and identifies the motor phase sequence according to the motor speed information, the motor phase current and the DC input terminal current of the rear motor controller, and sends the phase sequence identification result to the instrument for display.

[0010] Preferably, the hydrogen fuel cell vehicle motor phase sequence self-identification system also includes a differential and a reducer, and the differential is installed inside the reducer through gears.

[0011] Preferably, the rear motor controller is connected to the motor via a three-phase copper busbar.

[0012] Preferably, the motor, reducer and differential are connected to the rear drive shaft of the fuel cell vehicle via a gear sleeve.

[0013] In addition, in order to achieve the above-mentioned purpose, the present invention also provides a hydrogen fuel cell vehicle motor phase sequence self-identification method, the hydrogen fuel cell vehicle motor phase sequence self-identification method comprising the following steps:

[0014] S1, the vehicle completes driving high voltage power-up;

[0015] S2: When the motor speed is 0, and the depth information of the accelerator pedal and the brake pedal are both greater than or equal to 50% and last for 10 seconds, enter the phase sequence identification mode;

[0016] S3, the instrument prompts the driver to step on the accelerator deeply;

[0017] S4, the vehicle controller sends a first target torque according to the driver's demand;

[0018] S5, determine whether the first condition is met, if not, proceed to step S6; otherwise, proceed to step S7;

[0019] S6, determine that the motor is in a state of correct phase sequence matching, and the instrument shows that the phase sequence matching is correct, and enter step S11;

[0020] S7, determine that the motor is in a phase sequence matching error state, the instrument displays a phase sequence matching error, and the motor controller enters a phase sequence adjustment mode, exchanging two phases in the UVW phase sequence;

[0021] S8, the instrument prompts the driver to step on the accelerator deeply;

[0022] S9, the vehicle controller sends a second target torque according to the driver's demand;

[0023] S10, judging whether the second condition is met, if so, the phase sequence adjustment is determined to be successful, the instrument displays that the phase sequence adjustment is successful, and the process goes to step S11; otherwise, the process returns to step S7;

[0024] S11, exit the phase sequence identification mode and end the process.

[0025] Preferably, the first condition is: the first target torque continues to increase to 0.5Tmax, and the motor speed detection state is always 0, the motor phase current continues to increase with the increase of the first target torque, and the DC input terminal current of the rear motor controller is ≤5A.

[0026] Preferably, the second condition is: the motor has torque output and the motor speed is greater than or equal to 20 rpm for 0.2 s, or the DC input current of the rear motor controller is ≥10A.

[0027] Preferably, the Tmax is the peak torque of the motor.

[0028] Preferably, if the phase sequence adjustment fails for multiple consecutive times, it is determined that the electric drive system is damaged, and the instrument prompts to replace the electric drive system in time.

[0029] Beneficial effects of the invention: The invention provides a hydrogen fuel cell vehicle motor phase sequence self-identification system and method, the system has a simple structure, low cost, high stability and reliability, and is widely applicable, has a low misjudgment rate, reliable control, and also has a prompt function. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural diagram of a hydrogen fuel cell vehicle motor phase sequence self-identification system of the present invention;

[0031] Figure 2 The present invention is a flowchart of a method for self-identifying the phase sequence of a hydrogen fuel cell vehicle motor. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0033] Please refer to Figure 1 , Figure 1 This is a structural diagram of a hydrogen fuel cell vehicle motor phase sequence self-identification system of the present invention;

[0034] The present invention provides a hydrogen fuel cell vehicle motor phase sequence self-identification system, the hydrogen fuel cell vehicle motor phase sequence self-identification system comprising: a rear motor controller, a motor, a vehicle controller, a brake pedal and an accelerator pedal;

[0035] The vehicle controller is connected to the brake pedal and the accelerator pedal via a signal acquisition line;

[0036] The vehicle controller, the motor, and the rear motor controller are connected via a CAN communication signal line;

[0037] The vehicle controller collects depth information of the accelerator pedal and the brake pedal, controls the motor according to the driver's needs, and sends the target torque; the rear motor controller outputs the target torque according to the target torque sent by the vehicle controller, and controls the motor to execute the target torque to obtain the motor speed. The vehicle controller obtains the motor speed information, the motor phase current information and the DC input terminal current information of the rear motor controller, and identifies and adjusts the motor phase sequence according to the motor speed information, the motor phase current information and the DC input terminal current information of the rear motor controller.

[0038] In this embodiment, the hydrogen fuel cell vehicle motor phase sequence self-identification system further includes: a fuel cell system, a power battery system;

[0039] The fuel cell system, the power battery system and the vehicle controller are connected via a CAN communication signal line, and the fuel cell system and the power battery system provide kinetic energy for the fuel cell hydrogen energy vehicle to travel.

[0040] In this embodiment, the hydrogen fuel cell vehicle motor phase sequence self-identification system also includes a high-voltage distribution box; the high-voltage distribution box is respectively connected to the hydrogen fuel cell system, the power battery system, the rear motor controller, and the motor through a high-voltage wiring harness, and the high-voltage distribution box distributes electrical energy to the rear motor controller and the motor, and the rear motor controller drives the motor through electrical energy.

[0041] In this embodiment, the hydrogen fuel cell vehicle motor phase sequence self-identification system also includes a differential and a reducer, and the differential is installed inside the reducer through gears.

[0042] In this embodiment, the hydrogen fuel cell vehicle motor phase sequence self-identification system also includes a display screen, and the display screen is connected to the vehicle controller via a CAN communication signal line.

[0043] In this embodiment, the rear motor controller is connected to the motor via a three-phase copper busbar.

[0044] In this embodiment, the motor, reducer and differential are connected to the rear drive shaft of the fuel cell vehicle through a gear sleeve. The kinetic energy generated by the motor is transmitted to the reducer and differential through a mechanical connection, and finally the power is transmitted to the rear drive shaft to realize the driving function of the hydrogen energy vehicle.

[0045] Please refer to Figure 2 Based on the above-mentioned hydrogen fuel cell vehicle motor phase sequence self-identification system, the present invention also provides a hydrogen fuel cell vehicle motor phase sequence self-identification method, comprising the following steps:

[0046] S1, the vehicle completes driving high voltage power-up;

[0047] S2: When the motor speed is 0, and the depth information of the accelerator pedal and the brake pedal are both greater than or equal to 50% and last for 10 seconds, enter the phase sequence identification mode;

[0048] S3, the instrument prompts the driver to step on the accelerator deeply;

[0049] S4, the vehicle controller sends a first target torque according to the driver's demand;

[0050] S5, determine whether the first condition is met, if not, proceed to step S6; otherwise, proceed to step S7;

[0051] S6, determine that the motor is in a state of correct phase sequence matching, and the instrument shows that the phase sequence matching is correct, and enter step S11;

[0052] S7, determine that the motor is in a phase sequence matching error state, the instrument displays a phase sequence matching error, and the rear motor controller enters a phase sequence adjustment mode and exchanges two phases in the UVW phase sequence;

[0053] S8, the instrument prompts the driver to step on the accelerator deeply;

[0054] S9, the vehicle controller sends a second target torque according to the driver's demand;

[0055] S10, judging whether the second condition is met, if so, the phase sequence adjustment is determined to be successful, the instrument displays that the phase sequence adjustment is successful, and the process goes to step S11; otherwise, the process returns to step S7;

[0056] S11, exit the phase sequence identification mode and end the process.

[0057] In this embodiment, the first condition is: the first target torque continues to increase to 0.5Tmax, and the motor speed detection state is always 0, the motor phase current continues to increase with the increase of the first target torque, and the DC input current of the rear motor controller is ≤5A.

[0058] The second condition is: the motor has torque output and the motor speed is greater than or equal to 20rpm for 0.2s, or the DC input current of the rear motor controller is ≥10A.

[0059] Wherein, Tmax is the peak torque of the motor.

[0060] In this embodiment, the depth information range of the accelerator pedal and the designated pedal is 0-100%, and the corresponding value is 0-100.

[0061] In this embodiment, if the phase sequence adjustment fails for multiple consecutive times, it is determined that the electric drive system is damaged, and the instrument prompts to replace the electric drive system in time.

[0062] As an optional implementation, the phase sequence is adjusted up to five times each time identification is performed. If the cycle is repeated three times, the phase sequence can be adjusted up to 15 times. If it is still unsuccessful, it can be determined that the electric drive system is damaged, and the instrument prompts to replace the electric drive system in time.

[0063] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0064] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydrogen fuel cell vehicle motor phase sequence self-identification method, based on a hydrogen fuel cell vehicle motor phase sequence self-identification system, the hydrogen fuel cell vehicle motor phase sequence self-identification system comprising: Hydrogen fuel cell system, high-voltage distribution box, power battery system, rear motor controller, motor, reducer and differential, vehicle controller, brake pedal, accelerator pedal and instrument; The vehicle controller is connected to the brake pedal and the accelerator pedal respectively through a signal acquisition line; The vehicle controller, hydrogen fuel cell system, power battery system, rear motor controller, motor, and instrument are connected via a CAN communication signal line; The high-voltage distribution box is connected to the hydrogen fuel cell system, the power battery system, the rear motor controller and the motor respectively through high-voltage wires; The vehicle controller collects the depth information of the accelerator pedal and the brake pedal, controls the motor according to the driver's needs, and sends the target torque; The rear motor controller outputs the target torque according to the target torque sent by the vehicle controller, and controls the motor to execute the target torque to obtain the motor speed. The vehicle controller collects the motor speed information, the motor phase current information and the DC input terminal current information of the rear motor controller; And according to the motor speed information, the motor phase current and the DC input terminal current of the rear motor controller, the motor phase sequence is identified, and the phase sequence identification result is sent to the instrument for display; The hydrogen fuel cell vehicle motor phase sequence self-identification system also includes a differential and a reducer, wherein the differential is installed inside the reducer through gears; The rear motor controller is connected to the motor via a three-phase copper busbar; The motor, reducer and differential are connected to the rear drive shaft of the fuel cell vehicle through a gear sleeve; Characterized in that the hydrogen fuel cell vehicle motor phase sequence self-identification method comprises the following steps: S1, the vehicle completes driving high voltage power-up; S2: When the motor speed is 0, and the depth information of the accelerator pedal and the brake pedal are both greater than or equal to 50% and last for 10 seconds, enter the phase sequence identification mode; S3, the instrument prompts the driver to step on the accelerator deeply; S4, the vehicle controller sends a first target torque according to the driver's demand; S5, determine whether the first condition is met, if not, proceed to step S6; otherwise, proceed to step S7; S6, determine that the motor is in a state of correct phase sequence matching, and the instrument shows that the phase sequence matching is correct, and enter step S11; S7, determine that the motor is in a phase sequence matching error state, the instrument displays a phase sequence matching error, and the motor controller enters a phase sequence adjustment mode, exchanging two phases in the UVW phase sequence; S8, the instrument prompts the driver to step on the accelerator deeply; S9, the vehicle controller sends a second target torque according to the driver's demand; S10, judging whether the second condition is met, if so, the phase sequence adjustment is determined to be successful, the instrument displays that the phase sequence adjustment is successful, and the process goes to step S11; otherwise, the process returns to step S7; S11, exit the phase sequence identification mode and end the process.

2. A hydrogen fuel cell vehicle motor phase sequence self-identification method as claimed in claim 1, characterized in that: The first condition is: the first target torque continues to increase to 0.5Tmax, and the motor speed detection state is always 0, the motor phase current continues to increase with the increase of the first target torque, and the DC input terminal current of the rear motor controller is ≤5A.

3. A hydrogen fuel cell vehicle motor phase sequence self-identification method as claimed in claim 1, characterized in that: The second condition is: the motor has torque output and the motor speed is greater than or equal to 20rpm for 0.2s, or the DC input current of the rear motor controller is ≥10A.

4. A hydrogen fuel cell vehicle motor phase sequence self-identification method as claimed in claim 2, characterized in that: The Tmax is the peak torque of the motor.

5. A hydrogen fuel cell vehicle motor phase sequence self-identification method as claimed in claim 1, characterized in that: If the phase sequence adjustment fails for multiple consecutive times, it is determined that the electric drive system is damaged, and the instrument prompts to replace the electric drive system in time.

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