Semiconductor switching and chopper control circuits for a...

Details Semiconductor switching and chopper control circuits for a... Semiconductor switching and chopper control circuits for a...

H - Electricity

02

P

318/93

H02P 6/12 (2006.01)

Patent

CA 1174727

ABSTRACT OF THE DISCLOSURE The invention relates to a control device for a brushless D.C. motor having at least two stator windings, comprising semiconductor switching elements, a chopper, a choke coil between the semiconductor switching elements and the chopper, a sensor for detecting the rotary position of the rotor, a commutation control unit for the semiconductor elements controllable by the sensor, a chopper control stage with a transmission path for operating signals upstream of the control input of the chopper control stage, and current measuring means by which the chopper is controllable in response to the motor current by way of the chopper control stage, wherein each series circuit of a semiconductor switching element, the choke coil and the chopper is connectable in series with a respective stator coil to the D.C. operating voltage source.

369705

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