Dynamic braking for a three phase motor

Details Dynamic braking for a three phase motor Dynamic braking for a three phase motor

1972-09-25

1976-08-17

Rubinson, Gene Z.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

H02P 320

Patent

active

039756688

ABSTRACT:
Method and apparatus for dynamically braking a multiphase motor wherein, in a first embodiment, the stator windings of the motor are connected in a six winding delta configuration and direct braking current is applied between two center taps of the configuration. A damping diode is connected across two of the delta center taps to minimize voltage transients in the windings when the direct current is removed.
In a second embodiment, the stator windings are connected in a twisted Y--Y configuration, the connections to the neutral points of the two Y's of one phase winding set being interchanged and direct braking current being introduced between the two neutral points. A damping diode is connected between the center points of each Y to minimize voltage transients in the windings when the direct current is removed.

REFERENCES:
patent: 1997464 (1935-04-01), Krebs
patent: 3643242 (1972-02-01), Bryer
patent: 3721888 (1973-03-01), Allport

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