Electric motor with power supply circuit supplying isolated...

Details Electric motor with power supply circuit supplying isolated... Electric motor with power supply circuit supplying isolated...

2010-10-08

2011-11-01

Ip, Paul (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400090, C238S044000

Reexamination Certificate

active

08049447

ABSTRACT:
Circuitry for controlling motors, such as a brushless motor (BLM), is disclosed. The circuitry may comprise one or more inputs for receiving rotor position signals from one or more Hall effect sensors that detect the position of, for example, a BLM rotor. The circuitry may also comprise an input for receiving a pulse width modulated speed control signal. The circuitry generates one or more drive signals, each of which may comprise a logical combination (e.g., a logical AND combination) of the speed control signal and a rotor position signal, for controlling power switches that are coupled to electromagnets of the BLM.

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