Granted Patent B2

US 6,979,968 · App. 10/676,529 · Granted Dec 27, 2005

Abstract

Claims (26)

1. A method of managing processor execution time in a motor controller, the method comprising:

receiving motor speed data;

comparing the received motor speed data to predetermined motor speed ranges;

determining a motor speed range based on the comparison; and

increasing or decreasing a processor execution time by increasing or decreasing an inverter switching frequency of a motor controller processor based on the determined motor speed range.

2. The method of claim 1 , wherein receiving the motor speed data comprises:

receiving machine terminal information;

processing the received machine terminal information; and

determining motor speed data based on the processed machine terminal information.

3. The method of claim 2 , wherein the machine terminal information is selected from the group consisting of: machine terminal current and machine terminal voltage.

4. The method of claim 2 , wherein processing the received information utilizes a method selected from the group consisting of: back electromotive force method and high frequency injection method.

5. The method of claim 1 , wherein the predetermined motor speed ranges are manufacturer determined motor speed ranges.

6. The method of claim 1 , wherein modulating the inverter switching frequency of the motor control processor comprises:

determining a modified inverter switching frequency value based on the determined motor speed range; and

providing the modified inverter switching frequency value to a processor control algorithm;

wherein the processor control algorithm modifies the inverter switching frequency based on the modified inverter switching frequency value.

7. The method of claim 6 , wherein the processor control algorithm is selected from the group consisting of: an operating system and a BIOS.

8. The method of claim 6 , further comprising:

providing a first inverter switching frequency when the received motor speed data is within a first motor speed range;

providing a variable inverter switching frequency when the received motor speed data is within a second motor speed range; and

providing a second inverter switching frequency when the received motor speed data is within a second motor speed range.

9. A system for managing processor execution time in a motor controller, the system comprising:

means for receiving motor speed data;

means for comparing the received motor speed data to predetermined motor speed ranges;

means for determining a motor speed range based on the comparison; and

means for increasing or decreasing a processor execution time by increasing or decreasing an inverter switching frequency of the motor control processor based on the determined motor speed range.

Assignments (13)