Single processor dual motor control

Details Single processor dual motor control Single processor dual motor control

2011-04-12

2011-04-12

Benson, Walter (Department: 2837)

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Running-speed control

C318S034000, C318S053000, C318S068000

Reexamination Certificate

active

07923944

ABSTRACT:
A motor control processor is provided for motor phase current sampling of multiple variable frequency controlled electric motors, and includes an analog-to-digital (A/D) converter and a controller. The A/D converter has multiple analog inputs and generates a digital output signal in response to the multiple analog inputs. The controller is coupled to the A/D converter and determines a maximum desired switching frequency for a first one of the multiple variable frequency controlled electric motors. The controller further selects a base period in response to the maximum desired switching frequency and defines a phase shift time delay as a fraction of the base period so the controller may control the multiple analog inputs of the A/D converter to sample motor phase currents of each of the multiple variable frequency controlled electric motors at sample times determined by the controller in response to the base period and the phase shift time delay.

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Notice of Allowance dated Aug. 3, 2009, issued in U.S. Appl. No. 11/769,817.

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