A reduction clutch control system and method for a high power high torque density electric machine

Abstract

The application discloses a kind of high-power high torque density motor's reduction clutch control system and method, including motor starting dehydration, vibration acceleration sensor detects motor vibration direction and motor amplitude value in X direction, Y direction and Z direction respectively;Judgment module respectively calculates vibration acceleration sensor detection motor vibration direction and motor amplitude value in X direction, Y direction and Z direction respectively, and outputs washing machine horizontal impedance force;The acceleration selection module controls motor acceleration or deceleration according to the output washing machine impedance force.By detecting washing machine vibration and amplitude closed-loop control washing machine motor speed, effectively suppress the vibration caused by washing machine dehydration start.By detecting washing machine vibration and amplitude closed-loop control washing machine motor speed, effectively suppress the vibration caused by washing machine dehydration start.Flexible adaptation different load, according to different load conditions adaptive selection optimal acceleration strategy, further reduce vibration.

Description

TECHNICAL FIELD

[0001] The present application relates to a motor control system, in particular to a deceleration clutch control system of a high-power high-torque density motor. BACKGROUND

[0002] The deceleration clutch is also called a reducer, which functions to reduce the speed of the motor and increase the torque to drive the impeller. It is the main component of the transmission system of the impeller washing machine. By adjusting the position of the clutch, the synchronous and differential rotation between the impeller and the inner drum is realized. During washing, the clutch is engaged with the fixed gear ring, the reducer is in action, and the impeller and the inner drum rotate at different speeds. During dehydration, the clutch is engaged with the motor rotor slot or clutch disc, and the impeller and the inner drum rotate at the same speed.

[0003] Compared with other types of motors, high-power high-torque motors have higher power density and torque density, i.e., compared with other types of motors, high-power high-torque density motors provide the maximum power output and acceleration under the same mass and volume, such as permanent magnet synchronous motors, asynchronous motors and hub motors. The washing machine with high-power high-torque motor needs to reach tens of thousands of revolutions during dehydration to meet the requirement of dehydration speed. The high-speed operation of the motor brings adverse consequences such as vibration and noise. The clutch switching produces a large impact and noise, and long-term wear of the deceleration clutch engagement affects the engagement stiffness. SUMMARY

[0004] The present application is to overcome the problem of impact caused by the switching of the deceleration clutch of the high-power high-torque motor in the prior art, which produces a large noise and long-term affects the engagement stiffness of the clutch. A high-power high-torque density deceleration clutch control system based on sensor vibration closed-loop control is provided to effectively prevent impact.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a high-power high-torque density motor deceleration clutch control system, comprising a vibration acceleration detection module: for detecting and transmitting the vibration data and acceleration data of the washing machine during dehydration start;

[0006] A judgment module: the judgment module is in communication connection with the vibration acceleration detection module, and the vibration data output by the vibration acceleration detection module is taken as input. The vibration data is judged and the judgment result is output;

[0007] An acceleration selection module: the acceleration selection module is in communication connection with the judgment module, receives the judgment result output by the judgment module, and controls the motor acceleration or deceleration according to the judgment result.

[0008] As a preferred, the vibration data includes the direction of the washing machine vibration and the amplitude value of the motor in X direction, Y direction and Z direction respectively.

[0009] As preferred, the vibration acceleration detection module is a three-axis acceleration sensor.

[0010] A speed reduction clutch control method of a high-power torque density motor, comprising the following steps:

[0011] Step S1: When the motor starts to dehydrate, the vibration acceleration sensor detects the vibration direction of the motor and the amplitude values of the motor in X, Y and Z directions respectively;

[0012] Step S2: The judgment module calculates the amplitude values of the vibration acceleration sensor detecting the vibration direction of the motor in X, Y and Z directions respectively, and outputs the horizontal impedance force of the washing machine;

[0013] Step S3: The acceleration selection module controls the motor to accelerate or decelerate according to the output impedance force of the washing machine. By detecting the vibration and amplitude of the washing machine, the motor speed of the washing machine is closed-loop controlled, and the vibration caused by the dehydration start of the washing machine is effectively suppressed.

[0014] As preferred, the step 2 specifically comprises: calculating the horizontal force of the washing machine according to the vibration direction of the washing machine and the amplitude values of the motor in X, Y and Z directions respectively; calculating and outputting the horizontal impedance force of the washing machine based on the horizontal force of the washing machine, the gravity of the washing machine and the friction coefficient of the washing machine relative to the ground.

[0015] Further, the gravity of the washing machine includes the gravity of the washing machine and the gravity of the clothes and water inside the washing machine, i.e. the sum of the gravity of the washing machine and the internal load of the washing machine, which is suitable for adjusting the dehydration vibration of the washing machine with different load masses.

[0016] As preferred, the step S3 comprises: judging whether the horizontal impedance force of the washing machine is not greater than 0, if the horizontal impedance force of the washing machine is not greater than 0, the acceleration selection module controls the motor to accelerate until the motor speed reaches a preset dehydration speed.

[0017] As preferred, the step S3 comprises: judging whether the horizontal impedance force of the washing machine is greater than 0, if the horizontal impedance force of the washing machine is greater than 0, judging whether the horizontal impedance force of the washing machine is greater than a preset threshold, the preset threshold being a natural number greater than 0, if the horizontal impedance force of the washing machine is greater than the preset threshold, the acceleration selection module controls the motor to decelerate. The preset threshold is an impedance value that can cause the washing machine to displace, avoiding excessive horizontal impedance force caused by too fast acceleration of the washing machine, thereby effectively preventing the washing machine from displacing relative to the ground.

[0018] As preferred, the horizontal impedance force F 水 satisfies:

[0019] F水 = A - B;

[0020] Wherein, A is the horizontal force of the washing machine, B is the static friction force of the washing machine to the bottom surface.

[0021] Therefore, the present application has the following beneficial effects: (1) by detecting the washing machine vibration and amplitude closed loop control of the motor speed of the washing machine, effectively inhibit the vibration caused by the washing machine dehydration start. (2) flexible adaptation to different load, according to the different load conditions, adaptive selection of the optimal acceleration strategy, further reduce the vibration. (3) by limiting the preset threshold, avoid the washing machine due to the acceleration of too fast generated too large horizontal direction impedance force, thereby effectively prevent the washing machine displacement relative to the ground. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the speed reduction clutch control method flow chart of the high power high torque density motor of an embodiment of the present application. DETAILED DESCRIPTION

[0023] The present application will be further described below in conjunction with the drawings and specific embodiments.

[0024] Embodiment:

[0025] A high power high torque density motor speed reduction clutch control system, comprising a vibration acceleration detection module: for detecting and transmitting the vibration data and acceleration data of the washing machine during dehydration start. The vibration data includes the direction of the washing machine vibration and the amplitude value of the motor in X direction, Y direction and Z direction respectively. The vibration acceleration detection module is a three axis acceleration sensor.

[0026] The judgment module is in communication connection with the vibration acceleration detection module, and the vibration data output by the vibration acceleration detection module is taken as the input, the vibration data is judged and the judgment result is output;

[0027] The acceleration selection module is in communication connection with the judgment module, receives the judgment result output by the judgment module, and controls the acceleration or deceleration of the motor according to the judgment result.

[0028] The embodiment also discloses a high power torque density motor speed reduction clutch control method, as shown in Figure 1 The method comprises the following steps:

[0029] Step S1: when the motor starts dehydration, the vibration acceleration sensor detects the vibration direction of the motor and the amplitude value of the motor in X direction, Y direction and Z direction respectively;

[0030] Step S2: The judgment module calculates the vibration acceleration sensor detection motor vibration direction and the amplitude value of the motor in the X direction, Y direction and Z direction respectively, and outputs the horizontal impedance force of the washing machine; the horizontal impedance force F 水 Satisfies:

[0031] F 水 =A-B;

[0032] Wherein A is the horizontal force of the washing machine, and B is the static friction force of the washing machine to the bottom surface.

[0033] Specifically: according to the vibration direction of the washing machine and the amplitude value of the motor in the X direction, Y direction and Z direction respectively; calculate the horizontal force of the washing machine; based on the horizontal force of the washing machine, the gravity of the washing machine and the friction coefficient of the washing machine relative to the ground, calculate and output the horizontal impedance force of the washing machine. The gravity of the washing machine includes the gravity of the washing machine and the gravity of the clothes and water in the washing machine drum, that is, the sum of the gravity of the washing machine and the internal load of the washing machine, which is suitable for adjusting the dehydration vibration of the washing machine with different load quality. Because the load cannot be predicted, the closed-loop control can effectively adjust the motor speed according to the real-time load, and further optimize the motor vibration. The motor runs at a large acceleration, and the amplitude will increase rapidly. The traditional starting mode cannot adjust the starting acceleration for different load conditions.

[0034] Step S3: The acceleration selection module controls the motor acceleration or deceleration according to the output washing machine impedance force. If the horizontal impedance force of the washing machine is not greater than 0, the acceleration selection module controls the motor to accelerate until the motor speed reaches the preset dehydration speed. If the horizontal impedance force of the washing machine is greater than 0, it is judged whether the horizontal impedance force of the washing machine is greater than the preset threshold value, which is a natural number greater than 0. If the horizontal impedance force of the washing machine is greater than the preset threshold value, the acceleration selection module controls the motor to decelerate. Closed-loop control is to control the motor acceleration through feedback when it is detected that the amplitude of the washing machine in a certain direction is too large, so as to realize stable acceleration.

[0035] By detecting the washing machine vibration and amplitude closed-loop control of the motor speed of the washing machine, the vibration caused by the dehydration start of the washing machine is effectively suppressed. The preset threshold value is the impedance value that can make the washing machine displace, which can avoid the excessive horizontal impedance force caused by the washing machine due to too fast acceleration, so as to effectively prevent the washing machine from displacing relative to the ground.

[0036] The specific embodiments described herein are merely illustrative of the spirit of the application. Various modifications or changes in addition or substitution to the described specific embodiments can be made by those skilled in the art without departing from the spirit of the application or exceeding the scope of the appended claims.

[0037] Although the terms vibration acceleration sensor, high power, torque density, closed loop control, etc. are used herein more frequently, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the nature of the application; any interpretation of them as an additional limitation is contrary to the spirit of the application.

Claims

1. A reduction clutch control system for a high-power, high-torque-density motor, characterized in that, Includes a vibration acceleration detection module: used to detect and transmit vibration and acceleration data of the washing machine when the spin cycle starts; Judgment Module: The judgment module is communicatively connected to the vibration acceleration detection module. It uses the vibration data output by the vibration acceleration detection module as input, judges the vibration data, and outputs the horizontal resistance force of the washing machine, including: Based on the vibration direction of the washing machine and the amplitude values ​​of the motor in the X, Y, and Z directions, calculate the horizontal force of the washing machine; based on the horizontal force of the washing machine, the weight of the washing machine, and the coefficient of friction between the washing machine and the ground, calculate and output the horizontal resistance force of the washing machine. Acceleration selection module: The acceleration selection module is communicatively connected to the judgment module, receives the horizontal impedance force of the washing machine output by the judgment module, and controls the motor to accelerate or decelerate according to the horizontal impedance force of the washing machine.

2. The reduction clutch control system for a high-power, high-torque-density motor according to claim 1, characterized in that, The vibration data includes the direction of the washing machine's vibration and the amplitude values ​​of the motor in the X, Y, and Z directions, respectively.

3. A reduction clutch control system for a high-power, high-torque-density motor according to claim 1 or 2, characterized in that, The vibration acceleration detection module is a triaxial accelerometer.

4. A control method for a reduction clutch control system applied to a high-power, high-torque-density motor according to any one of claims 1-3, characterized in that, Includes the following steps: Step S1: When the motor starts the spin cycle, the vibration acceleration sensor detects the vibration direction of the washing machine and the amplitude values ​​of the washing machine in the X, Y and Z directions respectively; Step S2: The judgment module calculates the vibration direction of the motor detected by the vibration acceleration sensor and the amplitude values ​​of the motor in the X, Y and Z directions respectively, and outputs the horizontal resistance force of the washing machine. Step S3: The acceleration selection module controls the motor to accelerate or decelerate according to the output washing machine impedance force.

5. The method for controlling the reduction clutch of a high-power, high-torque-density motor according to claim 4, characterized in that, Step 2 specifically includes: calculating the horizontal force of the washing machine based on the vibration direction of the washing machine and the amplitude values ​​of the motor in the X, Y, and Z directions; and calculating and outputting the horizontal resistance force of the washing machine based on the horizontal force of the washing machine, the weight of the washing machine, and the friction coefficient of the washing machine relative to the ground, wherein the horizontal resistance force is positive towards the outside of the washing machine.

6. The method for controlling the reduction clutch of a high-power, high-torque-density motor according to claim 5, characterized in that, Step S3 includes: determining whether the horizontal resistance of the washing machine is not greater than 0. If the horizontal resistance of the washing machine is not greater than 0, the acceleration selection module controls the motor to accelerate until the motor speed reaches the preset spin speed.

7. The method for controlling the reduction clutch of a high-power, high-torque-density motor according to claim 6, characterized in that, Step S3 includes: determining whether the horizontal resistance of the washing machine is greater than 0; if the horizontal resistance of the washing machine is greater than 0, determining whether the horizontal resistance of the washing machine is greater than a preset threshold, wherein the preset threshold is a natural number greater than 0; if the horizontal resistance of the washing machine is greater than the preset threshold, the acceleration selection module controls the motor to decelerate.

8. The method for controlling the reduction clutch of a high-power, high-torque-density motor according to claim 7, characterized in that, The horizontal resistance force F 水 satisfy: F 水 =A-B; Where A is the horizontal force exerted by the washing machine, and B is the static friction force exerted by the washing machine on the ground.

Images