Reducing current reversal time in electric motor control

DWPI Title: Controlling current apparatus for electric motor winding, has energy storage device which operates during first transition and after first interval, for storing and releasing of energy to permit current flow in second direction
Abstract: The time required to reverse current flow in an electric motor is reduced by exploiting inductive current that persists in the motor when power is temporarily removed. Energy associated with this inductive current is used to initiate reverse current flow in the motor.
Use: Controlling current apparatus for electric motor winding used for multi-phase electric motors.
Advantage: Reduces time required to reverse current flow in an electric motor by exploiting inductive current that persists in the motor when power is temporarily removed, without requiring an attendant increase in power consumption.
Novelty: The apparatus has a current switching structure that has first and second nodes adapted for coupling the winding in series. A controller is coupled to the current switching structure to control the current switching structure. A current blocking device blocks the inductive current from one power supply node during the first interval. An energy storage device is coupled to one of the nodes, and operates during first transition and after first interval, for storing and releasing of energy to permit a current flow in second direction from second node through the winding to first node.
Filed: 6/2/2011
Application Number: US13152067A
Tech ID: SD 11103.0
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
Data from Derwent World Patents Index, provided by Clarivate
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