Title:
DRIVING CIRCUIT OF BRUSHLESS MOTOR
Document Type and Number:
Japanese Patent JPS57160388
Kind Code:
A
Abstract:
PURPOSE:To perform a wide range frequency control by driving a motor coil by controlling a switching mechanism connected to the input side of an amplifier and the plurality of amplifiers with a pulse generator mechanism based on totor position signal. CONSTITUTION:The output of linear amplifiers A1-A3 connects to motor coils L1-L3 and the signal from hole elements H1-H3 provided on a rotor Rt is fed to a pulse generator 1 the output of which open-circuits amplifiers A1-A3. A voltage obtained by dividing the operating voltage in half is applied to the non-inversion input terminals of the amplifiers A1-A3, and the switching circuits S1-S3 containing transistors which are actuated responding to rotation phase with the pulse oscillator 1, and are connected to inverted input terminals. By making controlling voltage Vm variable, a smooth frequency control becomes possible even at a voltage close to zero, driving the motor with high accuracy.
Inventors:
ABE FUMIYOSHI
OKAFUJI TAKAYUKI
OKAFUJI TAKAYUKI
Application Number:
JP4674581A
Publication Date:
October 02, 1982
Filing Date:
March 30, 1981
Export Citation:
Assignee:
SONY CORP
International Classes:
H02P6/22; H02P6/06; H02P6/08; H02P6/30; (IPC1-7): H02P6/02
Domestic Patent References:
| JPS5076516A | 1975-06-23 | |||
| JPS5658790A | 1981-05-21 | |||
| JPS55131290A | 1980-10-11 |