Self-starting transducerless, brushless D.C. motor controller

Details Self-starting transducerless, brushless D.C. motor controller Self-starting transducerless, brushless D.C. motor controller

1982-07-26

1984-06-19

Dobeck, B

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

318254, 318439, 318318, 318696, 318721, H02K 2900, H02P 700

Patent

active

044555130

ABSTRACT:
A transducerless brushless permanent magnet motor in which a signal induced by the rotor in an unexcited winding is used to sense the rotor position. The sensed voltage, induced in the winding by the rotor, is integrated to provide a representation of the magnetic flux coupling the rotor and winding. Before start-up, both the rotor position and the integrator are initialized to align the circuit representation of the flux with the actual flux.
In an additional embodiment of the invention, a self-initialization circuit is provided to automatically preset the rotor and flux integrator to pre-determined and corresponding values.

REFERENCES:
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patent: 3754175 (1973-08-01), Girault
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patent: 3896357 (1975-07-01), Tanikoshi
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patent: 3999108 (1976-12-01), Tanikoshi
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patent: 4151449 (1979-04-01), Takahashi
patent: 4162435 (1979-07-01), Wright
patent: 4250435 (1981-02-01), Alley et al.
patent: 4266432 (1981-05-01), Schroeder et al.
patent: 4275343 (1981-06-01), Fulton et al.

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