Motor driver controller analysis device

Patent metadata

Field	Value
Publication number	US-11575342-B2
Application number	US-202017028808-A
Country	US
Kind code	B2
Filing date	Sep 22, 2020
Priority date	Sep 22, 2020
Publication date	Feb 7, 2023
Grant date	Feb 7, 2023

Abstract

A motor driving system includes motor driving circuitry configured to operate an electric motor. The system further includes a controller that is configured to send a signal to energize the electric motor and to measure a back electromotive force voltage of the electric motor. The controller is further configured to determine a temperature value based on the measured back electromotive force voltage using a back electromotive force voltage mapping that maps back electromotive force voltages to temperature values. The controller is further configured to determine an expected winding resistance value based on the determined temperature value using a resistance mapping that maps winding resistance values to temperature values. The controller is further configured to measure a winding resistance of the electric motor, to compare the measured winding resistance of the electric motor to the expected winding resistance value, and to output a match result indication based on the comparison.

First claim

The invention claimed is:

1. A motor driving system, comprising:
motor driving circuitry configured to operate an electric motor; and
a motor driver controller operably coupled to the motor driving circuitry, comprising:
a memory operable to store:
a back electromotive force voltage mapping configured to map back electromotive force voltages to temperature values for a plurality of electric motors;
a resistance mapping configured to map winding resistance values to temperature values for the plurality of electric motors; and

a processor operably coupled to the memory, operable to:
send a signal to the motor driving circuitry to energize the electric motor;
measure a back electromotive force voltage of the electric motor;
determine a temperature value based on the measured back electromotive force voltage using the back electromotive force voltage mapping;
determine an expected winding resistance value based on the determined temperature value using the resistance mapping;
measure a winding resistance of the electric motor;
compare the measured winding resistance of the electric motor to the expected winding resistance value; and
output a match result indication based on the comparison.

2. The system of claim 1 , wherein the output match result indicates a match when the measured winding resistance of the electric motor matches the expected winding resistance value.

3. The system of claim 1 , wherein:
the memory is further operable to store a motor driver profile that comprises settings for operating the electric motor; and
the processor is further configured to:
determine that the match result indicates a match between the measured winding resistance of the electric motor and the expected winding resistance value; and
send signals to the motor driving circuitry to operate the electric motor in accordance with the motor driver profile in response to determining that the match result indicates a match between the measured winding resistance of the electric motor and the expected winding resistance value.

4. The system of claim 1 , wherein the output match result indicates a mismatch when the measured winding resistance of the electric motor does not match the expected winding resistance value.

5. The system of claim 1 , wherein the processor is further configured to:
determine that the match result indicates a mismatch between the measured winding resistance of the electric motor and the expected winding resistance value;
identify a second electric motor from the resistance mapping that corresponds with the determined temperature value and the measured winding resistance in response to determining that the match result indicates a mismatch between the measured winding resistance of the electric motor and the expected winding resistance value; and
output information that identifies the second electric motor.

6. The system of claim 1 , wherein:
the memory is further operable to store a plurality of motor driver profiles, wherein:
each motor driver profile corresponds with one of the plurality of electric motors; and
each motor driver profile comprises settings for operating an electric motor; and

the processor is further configured to:
determine that the match result indicates a mismatch between the measured winding resistance of the electric motor and the expected winding resistance value;
identify a second electric motor from the resistance mapping that corresponds with the determined temperature value and the measured winding resistance in response to determining that the match result indicates a mismatch between the measured winding resistance of the electric motor and the expected winding resistance value;
identify a motor driver profile that corresponds with the second electric motor; and
send signals to the motor driving circuitry to operate the electric motor in accordance with the motor driver profile.

7. The system of claim 1 , wherein outputting the match result indication comprises outputting a coded message using light-emitting diodes.

8. A motor analysis method, comprising:
sending a signal to motor driving circuitry to energize an electric motor;
measuring a back electromotive force voltage of the electric motor;
determining a temperature value based on the measured back electromotive force voltage using a back electromotive force voltage mapping, wherein the back electromotive force voltage mapping is configured to map back electromotive force voltages to temperature values for a plurality of electric motors;
determining an expected winding resistance value based on the determined temperature value using a resistance mapping, wherein the resistance mapping configured to map winding resistance values to temperature values for the plurality of electric motors;
measuring a winding resistance of the electric motor;
comparing the measured winding resistance of the electric motor to the expected winding resistance value; and
outputting a match result indication based on the comparison.

9. The method of claim 8 , wherein the output match result indicates a match when the measured winding resistance of the electric motor matches the expected winding resistance value.

10. The method of claim 8 , further comprising:
determining that the match result indicates a match between the measured winding resistance of the electric motor and the expected winding resistance value; and
sending signals to the motor driving circuitry to operate the electric motor in accordance with a motor driver profile in response to determining that the match result indicates a match between the measured winding resistance of the electric motor and the expected winding resistance value, wherein the motor driver profile that comprises settings for operating the electric motor.

11. The method of claim 8 , wherein the output match result indicates a mismatch when the measured winding resistance of the electric motor does not match the expected winding resistance value.

12. The method of claim 8 , further comprising:
determining that the match result indicates a mismatch between the measured winding resistance of the electric motor and the expected winding resistance value;
identifying a second electric motor from the resistance mapping that corresponds with the determined temperature value and the measured winding resistance in response to determining that the match result indicates a mismatch between the measured winding resistance of the electric motor and the expected winding resistance value; and
outputting information that identifies the second electric motor.

13. The method of claim 8 , further comprising:
determining that the match result indicates a mismatch between the measured winding resistance of the electric motor and the expected winding resistance value;
identifying a second electric motor from the resistance mapping that corresponds with the determined temperature value and the measured winding resistance in response to determining that the match result indicates a mismatch between the measured winding resistance of the electric motor and the expected winding resistance value;
identifying a motor driver profile from among a plurality of motor driver profiles that corresponds with the second electric motor, wherein the motor driver profile that comprises settings for operating the second electric motor; and
sending signals to the motor driving circuitry to operate the electric motor in accordance with the motor driver profile.

14. The method of claim 8 , wherein outputting the match result indication comprises outputting a coded message using light-emitting diodes.

Assignees

• Lennox Ind Inc

Inventors

• Sandoval Jose
• Subramaniam Palanivel
• Veselka Harvey

Classifications

• H02P29/67 Primary

  Controlling or determining the motor temperature by back electromotive force [back-EMF] evaluation · CPC title

• H02P29/00 Primary

  Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors (arrangements for starting electric motors H02P1/00; arrangements for stopping or slowing electric motors H02P3/00; control of motors that can be connected to two or more different electric power supplies H02P4/00; regulating or controlling the speed or torque of two or more electric motors H02P5/00; vector control H02P21/00) · CPC title