Electricity: motive power systems – Switched reluctance motor commutation control
Reexamination Certificate
2007-03-20
2007-03-20
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Switched reluctance motor commutation control
C318S722000, C318S724000
Reexamination Certificate
active
11375456
ABSTRACT:
A circuit for controlling a multi-phase machine having a stator with stator windings includes a controller, primary commutation switch pairs, a neutral terminal, and commutation control switches. Each switch pair includes first and second primary commutation switches connected at a node. Each commutation control switch is coupled to a winding so that a stator winding circuit is formed between the neural terminal and a respective one of the nodes. Each commutation control switch includes a first diode connected in parallel with a series switch circuit. Each series switch circuit includes a second diode and a series connected switch element. The controller is coupled to the switch elements and the primary commutation switch pairs to control an on time and an off time of the primary commutation switches relative to a point where a supply voltage is equal to the back emf.
REFERENCES:
patent: 4847747 (1989-07-01), Abbondanti
patent: 5138242 (1992-08-01), Kim et al.
patent: 5661383 (1997-08-01), Schlager et al.
patent: 5677605 (1997-10-01), Cambier et al.
patent: 6236179 (2001-05-01), Lawler et al.
DeVries Christopher
GM Global Technology Operations Inc.
Ro Bentsu
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