System and method for EMI reduction in an electric braking system
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.
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.