Electronic control circuit, electronically commutated motor syst

Details Electronic control circuit, electronically commutated motor syst Electronic control circuit, electronically commutated motor syst

1984-07-06

1987-08-11

Shoop, Jr., William M.

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318439, 307108, H02P 602

Patent

active

046864369

ABSTRACT:
Electrical load powering apparatus has a load connection, a high voltage supply connection and a common, and includes electronic means for switching the high voltage supply connection to the load connection. The electronic switching means has an input and is responsive to a control voltage difference between the input and the load connection. The load connection is subject to high voltage excursions relative to the common due to the switching. An electronic control circuit for use in the electrical load powering apparatus includes a circuit having an active device for providing at least one pulse output relative to common and having at least one inherent capacitance. A circuit connected to the load connection inverts the pulse output of the circuit having the active device to produce the control voltage difference between the electronic switching means input and the load connection. An additional circuit charges the inherent capacitance of the circuit having the active device when one of the high voltage excursions occurs. An electronically commutated motor system, a regulated power supply and laundry apparatus utilizing the electronic control circuit are set forth. Methods for controlling the motor system, for operating apparatus for switching high voltage DC and for controlling electrical load powering apparatus generally are also described.

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