| 摘要 |
PURPOSE:To avoid torque ununiformity, by detecting a rotor position, to set the position to be a numerical value to provide the input of the value to a computer, and by producing pulse width signal with a duty changing with a sin function and a cos function. CONSTITUTION:A brushless servomotor 20 is provided with a rotor 1 and armature coils 2-3, and the driving device of the motor is composed of an encoder 4, a pulse generator 5, drivers 13-14, and a microprocessor 30. The microprocessor 30 is composed of a U/D counter 7, a computer 8, an I/O 9, pulse width modulation generators (PWM) 10-11, and a ROM 12. Then, the magnetic pole position of the rotor 1 is detected by the encoder 4, and position is set to be a numerical value by the U/D counter 7, and is informed to the computer 8. According to the information, by the computer 8, pulse width signal with duty changing with a sin function and a cos function is produced, and based on this signal, pulse width current with the duty changing with the sin, cos is permitted to flow to the field coils 2-3. |
