Device for preventing the burning of a coil for a brushless moto

Details Device for preventing the burning of a coil for a brushless moto Device for preventing the burning of a coil for a brushless moto

1992-12-16

1995-07-18

Martin, David

Electricity: motive power systems

Limitation of motor load, current, torque or force

318138, 318254, 361 23, 388815, H02H 708

Patent

active

054344883

ABSTRACT:
A device for preventing the burning of a coil for a brushless motor and capable of controlling the speed of the motor is disclosed. The device comprises a capacitor for storing a potential, a detection circuit for generating a signal indicative of the rotation of the motor, a signal generating circuit for receiving the signal from the detection circuit and generating a signal in accordance with the rotation of the motor, a first control circuit for charging and discharging the capacitor in accordance with the potential of the capacitor, the first control circuit generating a first control signal, a second control circuit for charging and discharging the capacitor in accordance with the signal generated from the position signal generating circuit, the first control signal, and the potential of the capacitor, the second control circuit generating a second control signal, and a third control circuit for performing a logic operation of the first control signal and the second control signal to control the output of a signal for exciting a coil of the motor based on the results of the logic operation.

REFERENCES:
patent: 3644808 (1972-02-01), Farre
patent: 3719875 (1973-03-01), Holland et al.
patent: 4030005 (1977-06-01), Doemen
patent: 4171532 (1979-10-01), Sloan et al.
patent: 4504881 (1985-03-01), Woda et al.
patent: 4553187 (1985-11-01), Burns et al.
patent: 4578623 (1986-03-01), Tsukutani et al.
patent: 4947091 (1990-08-01), Tukuoka

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