阅读说明：本技术 一种永磁同步电机最大电流转矩比的标定装置 (Calibration device for maximum current torque ratio of permanent magnet synchronous motor ) 是由 董万健 王冬 张德志 王栋 卢立户 李胜杰 于 2021-10-12 设计创作，主要内容包括：本发明涉及一种永磁同步电机最大电流转矩比的标定装置,包括启动开关、电机控制器、电机、CAN收发装置、扭矩传感器、测功机和测功机控制器,启动开关与电机控制器连接,电机控制器与电机连接,测功机控制器与测功机连接,电机控制器、扭矩传感器和测功机控制器之间通过CAN收发装置进行连接,电机和测功机均与扭矩传感器连接。与现有技术相比,本发明具有极大的减少人员的工作量,大大的提高标定的效率,避免标定人员的误操作引起的误差,有效提高标定的最大电流转矩比的准确性等优点。(The invention relates to a calibration device for the maximum current-torque ratio of a permanent magnet synchronous motor, which comprises a starting switch, a motor controller, a motor, a CAN (controller area network) transceiver, a torque sensor, a dynamometer and a dynamometer controller, wherein the starting switch is connected with the motor controller, the motor controller is connected with the motor, the dynamometer controller is connected with the dynamometer, the motor controller, the torque sensor and the dynamometer controller are connected through the CAN transceiver, and the motor and the dynamometer are connected with the torque sensor. Compared with the prior art, the method has the advantages of greatly reducing the workload of personnel, greatly improving the calibration efficiency, avoiding errors caused by misoperation of the calibration personnel, effectively improving the accuracy of the calibrated maximum current torque ratio and the like.)

1. The utility model provides a calibration device of PMSM maximum current torque ratio which characterized in that, includes starting switch (1), motor controller (2), motor (4), CAN transceiver (7), torque sensor (6), dynamometer (5) and dynamometer controller (3), starting switch (1) is connected with motor controller (2), motor controller (2) is connected with motor (4), dynamometer controller (3) is connected with dynamometer (5), be connected through CAN transceiver (7) between motor controller (2), torque sensor (6) and the dynamometer controller (3), motor (4) and dynamometer (5) all are connected with torque sensor (6).

2. The device for calibrating the maximum current-torque ratio of the permanent magnet synchronous motor according to claim 1, wherein the motor controller (2) and the dynamometer controller (3) are both connected with a power supply device (8).

3. The device for calibrating the maximum current-torque ratio of a permanent magnet synchronous motor according to claim 1, wherein the motor controller (2) is arranged in a heat sink (9).

4. A calibration arrangement for the maximum current-to-torque ratio of a permanent magnet synchronous motor according to claim 3, characterized in that a first temperature sensor (10) and a second temperature sensor (11) are connected to the motor controller (2).

5. The device for calibrating the maximum current-torque ratio of a permanent magnet synchronous motor according to claim 4, wherein the first temperature sensor (10) is arranged on the surface of the radiator (9).

6. The device for calibrating the maximum current-torque ratio of a permanent magnet synchronous motor according to claim 4, wherein the second temperature sensor (11) is arranged on a copper wire winding inside the motor (4).

7. The device for calibrating the maximum current-torque ratio of the permanent magnet synchronous motor according to claim 1, wherein the dynamometer controller (3) receives a command from the motor controller (2) and controls the dynamometer (5) to rotate at a constant speed.

8. The device for calibrating the maximum current-torque ratio of a permanent magnet synchronous motor according to claim 7, wherein the dynamometer controller (3) enters a rotation speed mode and executes a vector control program after receiving the command, so as to control the rotation speed of the dynamometer (5) at the rotation speed of the turning point of the motor.

9. The device for calibrating the maximum current-torque ratio of the permanent magnet synchronous motor according to claim 1, wherein the motor controller (2) acquires the maximum value of the motor phase current, which Is recorded as Ismax, the Ismax Is divided into 20 parts, namely Is1 and Is2 …, Is20, the motor controller (2) sets the control phase current to be Is1 from Is1, the initial current angle Is 0, and obtains the initial torque Tq from the torque sensor (6); the motor controller (2) maintains the phase current Is1 unchanged, and controls the motor (4) to output torque by taking a preset current angle as a step length; the motor controller (2) acquires torque information fed back by the torque sensor (6) all the time, low-pass filtering Is carried out on the torque information, burr signals are filtered out, the motor controller (2) records current control phase current and current angles to an internal storage element after capturing the maximum output torque while changing angles, IS1 current calibration Is completed, and the current motor (4) output torque Is stopped; and after the calibration of Is1 Is finished, sequentially carrying out current calibration on Is 2-Is 20 according to the method.

10. The device for calibrating the maximum current torque ratio of the permanent magnet synchronous motor according to claim 9, wherein the motor controller (2) issues a stop instruction to the dynamometer controller (3) after the Is20 calibration Is completed, the dynamometer controller (3) controls the dynamometer (5) to stop running, and the motor controller (2) performs interpolation compensation on the data after calibration and storage to finally obtain the calibration data of the maximum current torque ratio of the motor (4).

Technical Field

The invention relates to the technical field of new energy automobile electronics, in particular to a device for calibrating a maximum current torque ratio of a permanent magnet synchronous motor.

Background

With the continuous popularization and promotion of new energy vehicles, the number of new energy vehicles is continuously increased, and along with the increase of the energy consumption requirements of users on the new energy vehicles. The maximum current torque ratio is an important calibration index for measuring the energy consumption efficiency of the permanent magnet synchronous motor, in order to enable the motor to output the minimum current under the condition of the same torque, the maximum current torque ratio of the motor needs to be calibrated, the calibrated equipment and the calibrated method in the prior art have multiple functions, but the manual operation of the traditional rack wastes time and labor, the efficiency is low, and the misoperation is easy to occur.

Disclosure of Invention

The invention aims to provide a calibration device for the maximum current torque ratio of a permanent magnet synchronous motor, which aims to overcome the defects of low efficiency and easy misoperation caused by time and labor waste of manual operation in the prior art.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a calibration device of PMSM maximum current torque ratio, includes starting switch, machine controller, motor, CAN transceiver, torque sensor, dynamometer machine and dynamometer machine controller, starting switch is connected with machine controller, machine controller is connected with the motor, dynamometer machine controller is connected with the dynamometer machine, be connected through CAN transceiver between machine controller, torque sensor and the dynamometer machine controller, motor and dynamometer machine all are connected with torque sensor.

And the motor controller and the dynamometer controller are both connected with a power supply device.

Further, the power supply device supplies direct current power to the motor controller and the dynamometer controller.

The starting switch transmits a starting signal to the motor controller.

And the motor controller receives the starting signal, starts to execute a vector control program and controls the motor to be in a state that the phase current Is equal to 0.

The motor controller is arranged in the radiator, and the radiator is used for radiating the motor controller, so that the over-temperature protection frequency of the motor controller is reduced, and the execution efficiency of the system is improved.

The motor controller is connected with a first temperature sensor and a second temperature sensor.

Furthermore, the first temperature sensor is arranged on the surface of the radiator and used for measuring the temperature of the radiator, and the motor controller determines whether the motor is started or stopped according to the temperature of the radiator.

Furthermore, the second temperature sensor is arranged on a copper wire winding inside the motor and used for measuring the temperature of the winding inside the motor, and the motor controller determines whether the motor is started or stopped according to the temperature of the winding inside the motor.

The motor provides power and outputs torque according to the control of the motor controller.

The torque sensor measures the torque between the current motor and the dynamometer.

And the dynamometer controller receives the instruction of the motor controller and controls the dynamometer to rotate at a constant rotating speed.

Further, the motor controller sends an instruction to the dynamometer controller through the CAN transceiver device, and the instruction content is as follows: the target rotating speed is equal to the rotating speed of the turning point of the motor.

Further, after receiving the instruction, the dynamometer controller enters a rotation speed mode and executes a vector control program to control the rotation speed of the dynamometer at the rotation speed of the turning point of the motor.

The motor controller obtains the maximum value of the motor phase current, records the maximum value as Ismax, equally divides the Ismax into 20 parts of Is1 and Is2 … Is20, and from the beginning of the Is1, the motor controller sets the control phase current to be Is1 and the initial current angle to be 0, and obtains the initial torque to be Tq from the torque sensor; the motor controller maintains the phase current Is1 unchanged, and controls the output torque of the motor by taking a preset current angle as a step length; the motor controller acquires torque information fed back by the torque sensor all the time, low-pass filtering Is carried out on the torque information, burr signals are filtered, when the angle of the motor controller Is changed, after the motor controller captures the maximum output torque, the current control phase current and the current angle are recorded into an internal storage element, the current calibration of Is1 Is completed, and the current motor output torque Is stopped; and after the calibration of Is1 Is finished, sequentially carrying out current calibration on Is 2-Is 20 according to the method.

Further, after the IS20 calibration Is completed, the motor controller issues a shutdown instruction to the dynamometer controller, the dynamometer controller controls the dynamometer to stop running, the motor controller performs interpolation supplement on the data after calibration and storage, and finally calibration data of the maximum current-torque ratio of the motor are obtained.

In the calibration process, if the motor controller detects that the temperature value fed back by the first temperature sensor or the second temperature sensor is greater than the preset temperature threshold value, the motor controller controls the motor to stop, and continues the current calibration work when the temperature value fed back by the first temperature sensor or the second temperature sensor is less than the temperature threshold value.

Compared with the prior art, the invention has the following beneficial effects:

the motor controller, the motor, the torque sensor, the dynamometer and the dynamometer controller are used for calibrating the maximum current-torque ratio of the motor, the torque sensor is used for collecting the torque between the motor and the dynamometer, the motor controller is used for capturing the maximum output torque, the workload of personnel is greatly reduced, the calibration efficiency is greatly improved, and errors caused by misoperation of the calibration personnel are avoided; meanwhile, the maximum value of the phase current of the motor is equally divided into 20 parts for calibration, interpolation supplement is carried out on the data after calibration and storage, calibration data of the maximum current torque ratio of the motor are finally obtained, and the accuracy of the calibrated maximum current torque ratio is effectively improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of the operation flow of the motor controller of the present invention.

Reference numerals:

1-starting a switch; 2-a motor controller; 3-dynamometer machine controller; 4-a motor; 5-a dynamometer; 6-a torque sensor; 7-CAN transceiver; 8-power supply means; 9-a radiator; 10-a first sensor; 11-second sensor.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Examples

As shown in fig. 1, the calibration device for the maximum current-torque ratio of the permanent magnet synchronous motor comprises a starting switch 1, a motor controller 2, a motor 4, a CAN transceiver 7, a torque sensor 6, a dynamometer 5 and a dynamometer controller 3, wherein the starting switch 1 is connected with the motor controller 2, the motor controller 2 is connected with the motor 4, the dynamometer controller 3 is connected with the dynamometer 5, the motor controller 2, the torque sensor 6 and the dynamometer controller 3 are connected through the CAN transceiver 7, and the motor 4 and the dynamometer 5 are both connected with the torque sensor 6.

The motor controller 2 and the dynamometer controller 3 are both connected with a power supply device 8.

The power supply device 8 supplies direct current power to the motor controller 2 and the dynamometer controller 3.

The start switch 1 transmits a start signal to the motor controller 2.

The motor controller 2 starts execution of the vector control program upon receiving the start signal, and controls the motor 4 to be in a state where the phase current Is equal to 0.

The motor controller 2 is arranged in the radiator 9, and the radiator 9 is used for radiating the motor controller 2, so that the over-temperature protection frequency of the motor controller 2 is reduced, and the execution efficiency of the system is increased.

The motor controller 2 is connected with a first temperature sensor 10 and a second temperature sensor 11.

The first temperature sensor 10 is disposed on the surface of the heat sink 9, and measures the temperature of the heat sink 9, and the motor controller 2 determines whether the motor 4 is started or stopped according to the temperature of the heat sink 9.

The second temperature sensor 11 is arranged on a copper wire winding inside the motor 4, measures the temperature of the winding inside the motor 4, and the motor controller 2 determines whether the motor 4 is started or stopped according to the temperature of the winding inside the motor 4.

The motor 4 provides power and outputs torque according to the control of the motor controller 2.

The torque sensor 6 measures the amount of torque present between the motor 4 and the dynamometer 5.

The dynamometer controller 3 receives the instruction of the motor controller 2 and controls the dynamometer 5 to rotate at a constant rotation speed.

The motor controller 2 sends an instruction to the dynamometer controller 3 through the CAN transceiver 7, and the instruction content is as follows: and the target rotating speed is equal to the rotating speed of the turning point of the motor.

After receiving the instruction, the dynamometer controller 3 enters a rotation speed mode and executes a vector control program to control the rotation speed of the dynamometer 5 at the rotation speed of the turning point of the motor.

The motor controller 2 acquires the maximum value of the motor phase current, records the maximum value as Ismax, equally divides the Ismax into 20 parts of Is1 and Is2 … Is20, and from the beginning of the Is1, the motor controller 2 sets the control phase current to be Is1, the initial current angle Is 0, and the initial torque obtained from the torque sensor 6 Is Tq; the motor controller 2 maintains the phase current Is1 unchanged, and controls the motor 4 to output torque by taking a preset current angle as a step length; the motor controller 2 always acquires torque information fed back by the torque sensor 6, low-pass filtering processing Is carried out on the torque information, burr signals are filtered, when the angle of the motor controller 2 Is changed, after the motor controller captures the maximum output torque, the current control phase current and the current angle are recorded into an internal storage element, the current calibration of Is1 Is completed, and the current motor 4 Is stopped outputting the torque; and after the calibration of Is1 Is finished, sequentially carrying out current calibration on Is 2-Is 20 according to the method.

After the IS20 calibration Is completed, the motor controller 2 issues a shutdown instruction to the dynamometer controller 3, the dynamometer controller 3 controls the dynamometer 5 to stop running, the motor controller 2 performs interpolation supplement on the calibrated and stored data, and finally calibration data of the maximum current-torque ratio of the motor 4 Is obtained.

In this embodiment, a power line of the power supply device 8 is connected to power interfaces of the motor controller 2 and the dynamometer controller 3, a UVW three-phase line of the motor 4 is connected to the motor controller 2, a UVW three-phase line of the dynamometer 5 is connected to the dynamometer controller 3, CAN buses of the motor controller 2, the dynamometer controller 3, and the torque sensor 6 are connected to the CAN transceiver 7, and the motor 4 and the dynamometer 5 are connected to two ends of the torque sensor 6.

In specific implementation, as shown in fig. 2, the motor controller 2 obtains the state of the start switch 1 and the states of the first temperature sensor 10 and the second temperature sensor 11, controls the motor 4 and the dynamometer controller 3 to start operating the system, reads back the torque fed back by the torque sensor 6 by changing the phase current and the current angle, determines the maximum torque values corresponding to different angles under the same phase current, and records the current maximum torque, the phase current and the phase current angle after low-pass filtering processing is performed by the motor controller 2, thereby completing maximum current torque ratio calibration.

In addition, it should be noted that the specific embodiments described in the present specification may have different names, and the above descriptions in the present specification are only illustrations of the structures of the present invention. All equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the invention. Various modifications or additions may be made to the described embodiments or methods may be similarly employed by those skilled in the art without departing from the scope of the invention as defined in the appending claims.