Commutation compensation device for a DC machine

Details Commutation compensation device for a DC machine Commutation compensation device for a DC machine

1988-02-16

1989-10-03

Lall, Parshotam S.

Boots, shoes, and leggings

310186, 318439, 364481, 36457101, G06F 1520, H01R 3946

Patent

active

048721239

ABSTRACT:
A commutation compensation device for a DC machine of the type in which in addition to an interpole coil for the armature current flow, an interpole is provided with an auxiliary interpole coil and in response to a reference exciting current calculated based on the rate-of-change of the armature current, the exciting current for accomplishing the commutation compensation is caused to flow through a controlled DC power source to the auxiliary interpole coil. In order to further improve a degree of commutation compensation, when the commutation is degraded, the armature current adversely affecting the commutation, the rate-of-change of the armature current and so on are automatically calculated and evaluated by commutation degradation rate calculator, whereby a commutation compensating rate is automatically obtained and in response to the commutation compensating rate the corrected exciting current is delivered to the auxiliary interpole coil.

REFERENCES:
patent: 4048550 (1977-09-01), Harris
patent: 4112475 (1978-09-01), Stitt et al.
patent: 4217513 (1980-08-01), Kohzai et al.
patent: 4283667 (1981-08-01), Dinger
patent: 4435664 (1984-03-01), Boesel
patent: 4451752 (1984-05-01), Tahara et al.
patent: 4454460 (1984-06-01), Tahara et al.
patent: 4577151 (1986-03-01), Tanisaka et al.
patent: 4780656 (1988-10-01), Mitchell

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