Apparatus and method for controlling an electric motor

Details Apparatus and method for controlling an electric motor Apparatus and method for controlling an electric motor

1997-08-22

1998-10-27

Masih, Karen

Electricity: motive power systems

Limitation of motor load, current, torque or force

318432, 318433, 318445, 318474, H02K 1732

Patent

active

058281967

ABSTRACT:
A bypass circuit conducts electrical current around a motor starter to a current limiting switch assembly upon initiation of a flow of excessive electrical current to an electric motor to protect the motor starter against excessive current flow. Upon initiation of excessive current flow to the electric motor, the current limiting switch assembly opens a main circuit to interrupt current flow through the motor starter. The current limiting switch assembly includes a conductor or contact carrier which is movable from an initial position to an actuated position under the combined influence of current flow through a coil and opposition between magnetic fields from portions of an electrical circuit through which current flows in opposite directions.

REFERENCES:
patent: 3959753 (1976-05-01), Wafer
patent: 4991050 (1991-02-01), Heberlien et al.
patent: 5463294 (1995-10-01), Valdivia et al.

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