Control circuit for an synchronous electric motor of the brushle

Details Control circuit for an synchronous electric motor of the brushle Control circuit for an synchronous electric motor of the brushle

1995-09-06

1997-10-07

Ro, Bentsu

Electricity: motive power systems

Limitation of motor load, current, torque or force

318254, 318721, H02P 600

Patent

active

056752261

ABSTRACT:
A control circuit comprises a TRIAC (T) in series with the stator winding (1) of the motor across the terminals of an alternating voltage source (V.sub.M). A fixed sensor (H) is associated with the rotor (R) and operable to provide a signal indicative of the magnetic polarity of the part of the rotor (R) facing it. A diode circuit (DC) including at least one Zener diode supplies the sensor (H) and provides a signal indicative of the polarity of the alternating supply voltage (V.sub.M). A driver circuit (PC) is connected to the sensor (H) and to the diode circuit (DC) and pilots the control input (g) of the TRIAC (T) in a predetermined manner in dependence on the instantaneous position of the rotor (R) and the polarity of the supply voltage (V.sub.M).

REFERENCES:
patent: 4060753 (1977-11-01), Okuyama et al.
patent: 4125796 (1978-11-01), Nagase et al.
patent: 4600864 (1986-07-01), Sato
patent: 4769581 (1988-09-01), Rilly
patent: 4780652 (1988-10-01), Rilly
patent: 5386185 (1995-01-01), Beck et al.

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