Method and apparatus for resynchronizing a moving rotor of a pol

Details Method and apparatus for resynchronizing a moving rotor of a pol Method and apparatus for resynchronizing a moving rotor of a pol

1991-10-09

1992-12-15

Smith, Jr., David

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

H02P 602

Patent

active

051720361

ABSTRACT:
A circuit for resynchronizing the rotor of a polyphase dc motor having "Y" connected stator coils and a moving rotor has circuitry for determining the actual instantaneous position of the rotor, and circuitry for determining a desired rotor position precedent to executing a desired commutation sequence. Circuitry is provided for executing the desired commutation sequence when the circuit for determining the actual instantaneous position of the rotor detects that the rotor is actually in the desired rotor position, and circuitry is provided, responsive to a predetermined resynchronize signal such as an output enable signal, an overtemperature indicating signal, any other signal indicating abnormal operation condition of the motor or the driver circuit, or the like, (1) for inhibiting drive signals to the driving coils, (2) for initiating a resynchronizing routine to synchronize the position of the rotor to the desired commutation sequence, and (3) for reapplying drive signals to the coils after the position of the rotor of the motor has been synchronized with the desired commutation sequence.

REFERENCES:
patent: 4642537 (1987-02-01), Young
patent: 4857814 (1989-08-01), Duncan

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