Variable voltage switched current control

Details Variable voltage switched current control Variable voltage switched current control

1992-04-13

1993-11-16

Shoop, Jr., William M.

Electrical generator or motor structure

Dynamoelectric

Rotary

318293, H02K 709, G05F 108

Patent

active

052626920

ABSTRACT:
Provision of a digital controller in which the controller controls the bearing coil current by means of a switching bridge that periodically reverses the applied voltage to the coil. The controller selects an applied voltage from a plurality of discrete voltage sources. When a rapid change in the load current is required, a relatively large magnitude of applied voltage is used. When a relatively constant magnitude of average load current is required, a relatively smaller value of voltage is applied.

REFERENCES:
patent: 3698775 (1972-10-01), Gilbert
patent: 4612994 (1986-09-01), Kawamura
patent: 4623202 (1986-11-01), Shingu
patent: 4763032 (1988-08-01), Bramm et al.
patent: 4841184 (1989-06-01), Chen et al.
patent: 5066879 (1991-11-01), Yamamura

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