System and method for EMI reduction in an electric braking system

Patent metadata

Field	Value
Publication number	US-10131332-B1
Application number	US-201715658163-A
Country	US
Kind code	B1
Filing date	Jul 24, 2017
Priority date	Jul 24, 2017
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A controller for a brake may comprise a tangible, non-transitory memory configured to communicate with the controller, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the controller, cause the controller to perform operations comprising receiving, by the controller, a three-phase signal indicating a first duty cycle for a first phase signal, a second duty cycle for a second phase signal, and a third duty cycle for a third phase signal, determining, by the controller, a minimum value based upon the first phase signal, the second phase signal, and the third phase signal, and converting, by the controller, the minimum value to a zero value.

First claim

What is claimed is:

1. A controller for a brake, comprising:
a tangible, non-transitory memory configured to communicate with the controller, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the controller, cause the controller to perform operations comprising:
receiving, by the controller, a three-phase signal indicating a first duty cycle for a first phase signal, a second duty cycle for a second phase signal, and a third duty cycle for a third phase signal;
determining, by the controller, a minimum value based upon the first phase signal, the second phase signal, and the third phase signal; and
converting, by the controller, the minimum value to a zero value,
wherein converting the minimum value to the zero value includes subtracting the minimum value from the three-phase signal.

2. The controller of claim 1 , wherein at least one of the first phase signal, the second phase signal, and the third phase signal comprises the minimum value.

3. The controller of claim 2 , wherein the three-phase signal is converted to an edge reduced command signal in response to the converting.

4. The controller of claim 3 , wherein the controller outputs the edge reduced command signal to a bridge inverter.

5. The controller of claim 4 , wherein the controller is further configured to multiply at least one of the first duty cycle, the second duty cycle, or the third duty cycle by one half of a direct current (DC) voltage.

6. The controller of claim 5 , further comprising a field oriented control (FOC) logic.

7. The controller of claim 6 , wherein the controller further comprises an edge reduction module configured to receive the three-phase signal from the FOC logic.

8. The controller of claim 4 , wherein the controller controls a motor via the edge reduced command signal.

9. A brake arrangement, comprising:
a motor;
a controller in electronic communication with the motor; and
a tangible, non-transitory memory configured to communicate with the controller, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the controller, cause the controller to perform operations comprising:
receiving, by the controller, a motor angular position;
calculating, by the controller, a three-phase signal indicating a first duty cycle for a first phase signal, a second duty cycle for a second phase signal, and a third duty cycle for a third phase signal;
determining, by the controller, a minimum value based upon the first phase signal, the second phase signal, and the third phase signal; and
converting, by the controller, the minimum value to a zero value,
wherein converting the minimum value to the zero value includes subtracting the minimum value from the three-phase signal.

10. The brake arrangement of claim 9 , further comprising:
a current sensor, in communication with the controller; and
a position sensor, in communication with the controller and configured to measure the motor angular position.

11. The brake arrangement of claim 9 , wherein the controller comprises:
an edge reduction module; and
a field oriented control (FOC) logic.

12. The brake arrangement of claim 9 , further comprising an electro-mechanical brake actuator (EBA), wherein the motor is for the EBA.

13. The brake arrangement of claim 12 , wherein the three-phase signal is converted to an edge reduced command signal in response to the converting.

14. The brake arrangement of claim 13 , wherein the tangible, non-transitory memory causes the controller to perform operations further comprising sending, by the controller, the edge reduced command signal to the motor.

15. The brake arrangement of claim 14 , wherein the EBA is configured to apply a force to a pressure plate according to the edge reduced command signal.

16. The brake arrangement of claim 9 , wherein the controller comprises an electro-mechanical brake actuator controller.

17. The brake arrangement of claim 9 , wherein the tangible, non-transitory memory causes the controller to perform operations further comprising receiving, by the controller, a voltage command.

18. The brake arrangement of claim 17 , wherein the three-phase signal is calculated based upon the voltage command and the motor angular position.

19. A method of controlling a motor, comprising:
receiving, by a controller, a motor angular position;
calculating, by the controller, a three-phase signal indicating a first duty cycle for a first phase signal, a second duty cycle for a second phase signal, and a third duty cycle for a third phase signal;
determining, by the controller, a minimum value based upon the first phase signal, the second phase signal, and the third phase signal; and
converting, by the controller, the minimum value to a zero value,
wherein converting the minimum value to the zero value includes subtracting the minimum value from the three-phase signal.

20. The method of claim 19 , further comprising:
sending, by the controller, an edge reduced command signal to the motor, wherein the three-phase signal is converted to the edge reduced command signal in response to the converting; and
rotating a motor shaft in response to the sending.

Assignees

• Goodrich Corp

Inventors

• Mastrocola Naison E
• Durkee Scott R

Classifications

• B60T13/746

  and mechanical transmission of the braking action · CPC title

• B60T8/1703 Primary

  for aircrafts · CPC title

• B60T8/173 Primary

  Eliminating or reducing the effect of unwanted signals, e.g. due to vibrations or electrical noise · CPC title

• B60T13/662

  characterised by specified functions of the control system components · CPC title

• H02P6/085

  in a bridge configuration · CPC title