Brushless D.C. motor

Details Brushless D.C. motor Brushless D.C. motor

1976-07-06

1977-12-27

Hohauser, Herman J.

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02K 2900

Patent

active

040657060

ABSTRACT:
The invention relates to a brushless self-starting D.C. motor assembly of the type having a rotor with a permanent magnet providing a rotor field, a stator, and one or more stator windings. A D.C. source is provided along with electrically controllable power transistor switch means between said source and each of the windings. A position sensing coil element is mounted adjacent the rotor and has a core which is saturatable by the rotor field at a predetermined position of the rotor to provide a control signal. A control unit is disposed between the means and each of the switches for receiving the control signal and actuating each of the switches in turn in response thereto. The core is preferably ferrite and preferably a permanent magnet.

REFERENCES:
patent: 3766456 (1970-06-01), Carow
patent: 3961211 (1976-06-01), Vergues

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