Shaft voltage suppression circuit

Details Shaft voltage suppression circuit Shaft voltage suppression circuit

1984-03-28

1985-08-13

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

361 23, 363 53, H02H 900

Patent

active

045353778

ABSTRACT:
A shaft voltage suppression circuit is used with electrical motors or generators of the type including a field winding supported by a shaft which is movable within bearings, which motor or generator is supplied by way of relatively positive and negative buses with electrical power from a source including an electrical power conversion bridge having controlled rectifiers and uncontrolled rectifiers. The shaft voltage suppression circuit includes a first series combination of a first resistor and a first capacitor connected between the positive bus and a common voltage. A second series combination of a second resistor and a second capacitor is connected between the negative bus and the same common voltage and a unidirectional current conductor is connected in parallel with the second resistor such that there is established a low resistance path for current to pass from the negative bus to the common voltage.

REFERENCES:
patent: 3551781 (1970-12-01), Smith
patent: 3697820 (1972-10-01), Ehret
patent: 4287551 (1981-09-01), Watanabe

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