Apparatus for the control of a salient-pole machine

Details Apparatus for the control of a salient-pole machine Apparatus for the control of a salient-pole machine

1982-05-17

1984-06-12

Smith, Jr., David

Electricity: motive power systems

Synchronous motor systems

Field winding circuits

318723, 318803, H02P 540

Patent

active

044544618

ABSTRACT:
Apparatus for controlling a salient-pole machine includes a stator current control element to make the stator current i.sup.S follow preset desired values i.sub..phi..sup.S*. A field current control element develops from preset desired flux values .psi.*, from the flux signal output of a flux computer (direction .phi..sub.L) and from an inductance parameter (the shunt inductance X.sub.q of the machine) a fictitious field current value signal i.sub.O.sup.E*, which represents the field current value which would be used to control a hypothetical nonsalient-pole machine. This signal i.sub.O.sup.E* is modified by a correction factor derived from the product of the longitudinal component of the flux .psi..sub.d (from the flux computer) and the different between the reciprocals ((1/X.sub.q)-(1/X.sub.d)) of the shunt and series inductances of the machine, to give a field current control signal that accounts for the asymmetry of the salient-pole machine.

REFERENCES:
patent: 4276505 (1981-06-01), Bose
patent: 4651419 (1977-09-01), Takahashi

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