Speed detector using resolver

Details Speed detector using resolver Speed detector using resolver

1980-06-27

1982-11-09

Dobeck, B.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

318654, 318616, G05B 106

Patent

active

043587224

ABSTRACT:
In a speed detector having a fixed frequency oscillator for producing two-phase sine waves to excite two-phase exciting windings of a resolver, first and second multipliers for multiplying the output of the detecting winding of the resolver by the two-phase sine waves respectively, and a position conversion circuit and speed conversion circuit, the speed conversion circuit comprises: a third multiplier for multiplying a signal of the first multiplier by a signal of a VFO; and a fourth multiplier for multiplying a signal of the second multiplier by a signal of the VFO, the outputs of the third and fourth multipliers being applied through a comparator to a proportional integration amplifier, the output of which is used as the rotation speed signal and applied to the VFO, thereby to eliminate the necessity for provision of a countermeasure against harmonics and harmonic noise involved in the use of an integration circuit required when a resolver is used as a detector.

REFERENCES:
patent: 3896356 (1975-07-01), Hoffman et al.
patent: 4109189 (1978-08-01), Jacques et al.

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