Device for preventing a coil of a brushless motor from burning

Details Device for preventing a coil of a brushless motor from burning Device for preventing a coil of a brushless motor from burning

1989-10-30

1990-08-07

Bentsu, Ro

Electricity: motive power systems

Limitation of motor load, current, torque or force

318138, 318254, H02H 708

Patent

active

049470914

ABSTRACT:
A device for preventing a coil of a brushless motor from burning is disclosed. The device comprises: a first discharge transistor for discharging a capacitor when receiving a pulse signal which is generated in synchronization with the rotation of the motor; a control circuit for deactivating an output circuit for energizing a coil of the motor, when the voltage level of the capacitor is raised to a first predetermined level, and for activating the output circuit when the voltage level of the capacitor is lowered to a second predetermined level (the second predetermined level is lower than the first predetermined level); a detecting transistor which is ON when the voltage level of the capacitor is higher than a third predetermined level (the third predetermined level is higher than the first predetermined level); a circuit which has a first state and a second state, and changes its state from the first state to the second state when the detecting transistor is ON; and a second discharge transistor for discharging the capacitor when the circuit is in the second state.

REFERENCES:
patent: 3644808 (1972-02-01), Favre
patent: 3719875 (1973-03-01), Holland et al.
patent: 4030005 (1977-06-01), Doemen
patent: 4504881 (1985-03-01), Wada et al.
patent: 4553187 (1985-11-01), Burns et al.
patent: 4578623 (1986-03-01), Tsukutani et al.
patent: 4818924 (1989-04-01), Burney

Affiliated with

Also associated with

Rating

Device for preventing a coil of a brushless motor from burning does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for preventing a coil of a brushless motor from burning, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for preventing a coil of a brushless motor from burning will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-962428