Phase logic circuits for controlling motors

Electricity: motive power systems – Synchronous motor systems – Brushless motor closed-loop control

Reexamination Certificate

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Details

C318S400040, C318S400130, C388S811000, C235S454000

Reexamination Certificate

active

07812556

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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