Motor controller

Details Motor controller Motor controller

2008-12-17

2011-11-01

Benson, Walter (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400230, C318S400260, C318S503000

Reexamination Certificate

active

08049445

ABSTRACT:
A motor controller that outputs a drive signal to a direct-current motor to drive the motor is provided. The motor controller includes a drive circuit that generates the drive signal. The drive circuit superimposes on a direct-current voltage an alternating-current component having a frequency in the audible frequency range of the human ear, thereby generating the drive signal.

REFERENCES:
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patent: 6433507 (2002-08-01), Makaran et al.
patent: 6448729 (2002-09-01), Davies et al.
patent: 6801009 (2004-10-01), Makaran et al.
patent: 6924612 (2005-08-01), Ramirez et al.
patent: 7202622 (2007-04-01), Eskritt et al.
patent: 2007001366 (2007-01-01), None

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