Stator winding control circuit for a brushless d.c. motor

Electricity: motive power systems – Reciprocating or oscillating motor – Energizing winding circuit control

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Details

318254, H02K 2900

Patent

active

040669351

ABSTRACT:
A brushless d.c. motor includes a plurality of Hall elements 1-3 for detecting the relative positions of the rotor and stator poles, a comparator circuit 103 responsive to a bipolar input control signal A for generating an output signal B proportional to the absolute magnitude of signal A and an output signal D as a function of the polarity of signal A, a timing signal generator 104 for generating output signals E timed in relation to the Hall element outputs F and having a phase sequence in response to signal D, and a reversible current supply circuit 105 for driving a set of Y-connected stator windings 101 with currents C having a magnitude proportional to signal B and a phase sequence in accordance with signal E.

REFERENCES:
patent: 3501664 (1970-03-01), Veillette
patent: 3831072 (1974-08-01), Tanikoshi

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