Adjustable frequency PWM driver

Details Adjustable frequency PWM driver Adjustable frequency PWM driver

2009-05-06

2010-11-23

Benson, Walter (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S599000, C318S811000, C360S069000

Reexamination Certificate

active

07839103

ABSTRACT:
A driver for a motor in a device includes a reference generator to generate a reference value. A clock management module receives a plurality of clock signals. Each clock signal has a corresponding frequency that is different relative to the corresponding frequency of another clock signal. A clock management module selects a different clock signal of the plurality of clock signals for output from the clock management module at different times during operation of the device. A ramp generating module generates a ramp signal in accordance with the corresponding frequency associated with the selected clock signal. A first pulse width modulation module receives the reference signal and the ramp signal. The first pulse width modulation module outputs a first pulse width modulation driver signal for driving the motor based on the reference signal and the ramp signal.

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