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US 2015/0084559 A1Published application
Motor driving device
AssigneeRohm Co., Ltd.
InventorShigeru Hirata
Life of this patent
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Abstract
A motor driving device includes a clock oscillator configured to generate a clock signal; and a logic unit configured to receive the clock signal, control conduction of a 3-phase brushless direct current (DC) motor, and generate a revolutions per minute (RPM) detection signal. The clock oscillator is configured to switch an oscillation frequency of the clock signal depending on an RPM command signal input to set a target RPM of the 3-phase brushless DC motor.
Claims10
A motor driving device, comprising:
- a clock oscillator configured to generate a clock signal;
- and
- a logic unit configured to receive the clock signal, control conduction of a 3-phase brushless direct current (DC) motor, and generate a revolutions per minute (RPM) detection signal,
- wherein the clock oscillator is configured to switch an oscillation frequency of the clock signal depending on an RPM command signal input to set a target RPM of the 3-phase brushless DC motor.
1 more element
Dependencies are inferred from the claim text.