Control system for synchronous brushless motors

Electricity: motive power systems – Motor-reversing – Armature or primary circuit control

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318254, 318715, G05B 106

Patent

active

044477716

ABSTRACT:
A motor control system wherein the motor windings are energized by sinusoidal excitation currents synthesized from prerecorded sine values. The frequency of the winding excitation currents is synchronous with the rotor movement and the phase is a function of the rotor position with respect to the stator. The phase of the winding excitation is additionally controllable as a function of speed or some other adequate system parameter. It has further been found that the total operational speed range of the system is substantially increased by further adjusting and controlling the phase of the excitation currents as a function of the desired speed.

REFERENCES:
patent: 3346791 (1967-10-01), Brook
patent: 3896356 (1975-07-01), Hoffman
patent: 4282468 (1981-08-01), Barker et al.
patent: 4310790 (1982-01-01), Marquis
patent: 4342952 (1982-08-01), Bowie
IEEE Transactions on Industry Applications, "Controlled Power Angle Synchronous Motor Inverter Drive System" by Gordon R. Slemon et al., vol. 1A-9, No. 2, Mar. 1973.

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