Control circuit for a brushless d.c. motor

Details Control circuit for a brushless d.c. motor Control circuit for a brushless d.c. motor

H - Electricity

02

P

318/96

H02P 6/14 (2006.01)

Patent

CA 1094151

ABSTRACT The present invention relates to a control circuit for a brushless self-starting D.C. motor. The motor comprises a permanent magnet rotor and a stator coil. A component is provided which is magnetic field-dependent and which is subjected to the rotor field to determine the rotary position. A controllable electronic servo-element is connected in series with the stator coil at a D.C. source. The servo- element controls the flux through the stator coil in dependence on the rotary position of the rotor. The magnetic dependent parameter changes of the magnetic field-dependent component are converted to a control signal for the servo-element. The control circuit comprises an oscillator having an LC resonant circuit of which the inductance is formed by the magnetic field-dependent component in the form of a sensing coil having a core. The oscillations of the oscillator are modulated in response to the induction generated in the sensing coil by the rotor field. The control signal for the servo-element is derived from the modulated oscillator output and the oscillator frequency is considerably higher than the rotor speed of the D.C. motor.

255029

Affiliated with

Also associated with

Rating

Control circuit for a brushless d.c. motor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control circuit for a brushless d.c. motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control circuit for a brushless d.c. motor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-776546