Reversible direct current motor with a permanent magnet rotor an

Details Reversible direct current motor with a permanent magnet rotor an Reversible direct current motor with a permanent magnet rotor an

1978-09-27

1981-09-29

Truhe, J. V.

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

318254, 318439, 318257, H02P 602

Patent

active

042925738

ABSTRACT:
The polarity of the desired speed voltage of a speed control device and the commutation sequence of the current flowing in the stator windings are reversed for reversing an electronically commutated D.C. motor. A voltage, proportional to the EMF ad obtained from the motor voltage by I.times.R compensation, is used as the actual speed voltage for the speed control device, the polarity of the voltage proportional to the EMF being reversed when the direction of rotation signal changes.

REFERENCES:
patent: 3795850 (1974-03-01), Grygera
patent: 3942081 (1976-03-01), Liska et al.
patent: 4162435 (1979-07-01), Wright

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