Method and System for Measuring Motor Damping

Patent metadata

Field	Value
Publication number	US-2024183754-A1
Application number	US-202217799382-A
Country	US
Kind code	A1
Filing date	Jan 21, 2022
Priority date	May 24, 2021
Publication date	Jun 6, 2024
Grant date	—

Abstract

Embodiments of this application provide a method and system for measuring motor damping. In the method for measuring motor damping, a driving signal is generated to drive a to-be-tested motor to operate, and at a cut-off moment of the driving signal, the to-be-tested motor enters a free damping state and a turn-off signal is generated at this moment to cut off a test circuit of the to-be-tested motor. In this way, an acceleration of the to-be-tested motor having the test circuit cut off and in the free damping state can be acquired, and damping of the to-be-tested motor is obtained by using the acceleration of the to-be-tested motor having the test circuit cut off and in the free damping state, thereby realizing the measurement of the damping of the to-be-tested motor.

First claim

1 . A method for measuring motor damping, implemented by a system for measuring motor damping, the system including a processor, the method comprising:
generating a driving signal to drive a to-be-tested motor; generating, at a cut-off moment of the driving signal, a turn-off signal to cut off a test circuit of the to-be-tested motor, wherein at the cut-off moment of the driving signal, the to-be-tested motor is in a free damping state; acquiring an acceleration of the to-be-tested motor having the test circuit cut off and in the free damping state; and obtaining damping of the to-be-tested motor based on the acceleration of the to-be-tested motor having the test circuit cut off and in the free damping state.

2 . The method for measuring motor damping of claim 1 , wherein generating the turn-off signal at the cut-off moment of the driving signal drives a switch to be turned off to cut off the test circuit of the to-be-tested motor, wherein the switch is connected to the test circuit of the to-be-tested motor.

3 . The method for measuring motor damping of claim 1 , wherein acquiring acceleration of the to-be-tested motor having the test circuit cut off and in the free damping state comprises acquiring a target acceleration of the to-be-tested motor having the test circuit cut off and in the free damping state, wherein the target acceleration is obtained by signal conditioning of the acceleration of the to-be-tested motor having the test circuit cut off and in the free damping state.

4 . A method for measuring motor damping, implemented by a processor, the method comprising:
generating a driving signal to drive a to-be-tested motor, wherein at a cut-off moment of the driving signal, the to-be-tested motor is in a free damping state; acquiring an acceleration of the to-be-tested motor in the free damping state; and obtaining total damping of the to-be-tested motor based on the acceleration of the to-be-tested motor in the free damping state.

5 . The method for measuring motor damping according to claim 4 , wherein acquiring the acceleration of the to-be-tested motor in the free damping state comprises acquiring a target acceleration of the to-be-tested motor in the free damping state, wherein the target acceleration is obtained by signal conditioning of the acceleration of the to-be-tested motor in the free damping state.

6 . A system for measuring motor damping, comprising:
a processor; a test fixture configured for a to-be-tested motor to be mounted; an accelerometer connected to the processor and configured to detect the to-be-tested motor to obtain an acceleration of the to-be-tested motor; and a switch arranged on a branch connecting the processor to the to-be-tested motor, wherein the processor is configured to: generate a driving signal to drive the to-be-tested motor, wherein at a cut-off moment of the driving signal, the to-be-tested motor is in a free damping state; acquire, from the accelerometer, acceleration data of the to-be-tested motor in the free damping state; and obtain damping of the to-be-tested motor based on the acceleration data of the to-be-tested motor in the free damping state.

7 . The system for measuring motor damping of claim 6 , further comprising a sampling resistor and a power amplifier that are arranged on the branch connecting the processor to the to-be-tested motor.

8 . The system for measuring motor damping of claim 6 , further comprising a signal conditioner that is connected to the accelerometer and to the processor, wherein the signal conditioner is configured to:
perform signal conditioning on acceleration data provided by the accelerometer to generate conditioned acceleration data; and provide the conditioned acceleration data to the processor.

9 . The system for measuring motor damping of claim 6 , wherein the switch is an optronics relay.

10 . The system for measuring motor damping of claim 6 , further comprising a motor mounting area matching a structure of the to-be-tested motor arranged inside the test fixture.

11 . The system for measuring motor damping of claim 7 , further comprising a motor mounting area matching a structure of the to-be-tested motor arranged inside the test fixture.

12 . The system for measuring motor damping of claim 8 , further comprising a motor mounting area matching a structure of the to-be-tested motor arranged inside the test fixture.

13 . The system for measuring motor damping of claim 9 , further comprising a motor mounting area matching a structure of the to-be-tested motor arranged inside the test fixture.

14 . The system for measuring motor damping of claim 6 , wherein the processor is further configured to generate, at the cut-off moment of the driving signal, a turn-off signal to cut off a test circuit of the to-be-tested motors, and wherein the damping of the to-be-tested motor is based on the acceleration data of the to-be-tested motor having the test circuit cut off and in the free damping state.

15 . The system for measuring motor damping of claim 14 , wherein when the processor generates the turn-off signal at the cut-off moment, the processor is configured to drive the switch to be turned off to cut off the test circuit of the to-be-tested motor, wherein the switch is connected to the test circuit of the to-be-tested motor.

16 . The system for measuring motor damping of claim 14 , further comprising a signal conditioner that is connected to the accelerometer and to the processor, wherein the signal conditioner is configured to:
perform signal conditioning on acceleration data provided by the accelerometer to generate conditioned acceleration data; and provide the conditioned acceleration data to the processor, wherein the processor is further configured to acquire a target acceleration of the to-be-tested motor having the test circuit cut off and in the free damping state, wherein the target acceleration is based on the conditioned acceleration data.

17 . The system for measuring motor damping of claim 14 , wherein the processor is further configured to:
continuously monitor whether the cut-off moment of the driving signal is reached; and generate the turn-off signal responsive to the cut-off moment being reached.

18 . The system for measuring motor damping of claim 6 , wherein the damping is a total damping of the to-be-tested motor.

19 . The system for measuring motor damping of claim 18 , further comprising a signal conditioner that is connected to the accelerometer and to the processor, wherein the signal conditioner is configured to:
perform signal conditioning on acceleration data provided by the accelerometer to generate conditioned acceleration data; and provide the conditioned acceleration data to the processor, wherein the processor is further configured to acquire a target acceleration of the to-be-tested motor in the free damping state, wherein the target acceleration is based on the conditioned acceleration data.

20 . The method for measuring motor damping of claim 1 , further comprising:
continuously monitoring whether the cut-off moment of the driving signal is reached; and generating the turn-off signal responsive to the cut-off moment being reached.

Assignees

• Honor Device Co Ltd

Inventors

• Zhu Jianwei

Classifications

• G01M99/005 Primary

  Testing of complete machines, e.g. washing-machines or mobile phones (testing of machine parts G01M13/00; testing of electric apparatus or components G01R31/50) · CPC title

• G01R31/343 Primary

  in operation · CPC title

• H02P25/032 Primary

  Reciprocating, oscillating or vibrating motors · CPC title

• G01P15/00

  Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration · CPC title

• G01R31/34

  Testing dynamo-electric machines · CPC title