Amtek Semiconductor Co., Ltd.

Kuo-Yung Yu

Teng-Hui Lee

Chen-Pin Lo

A motor driving device and a driving method thereof is disclosed herein and comprises a PWM converting circuit, an oscillator, a comparator, a controlling unit. The PWM converting circuit converts an analog signal according to an adjustable the highest setting voltage, an adjustable the lowest setting voltage and a controlling signal. The analog signal and a triangular signal generated by the oscillator are inputted to the comparator to compare to output a drive signal to the controlling unit so as to control the motor speed. The motor driving device in the present invention can adjust the motor rotating speed curve to set the lowest rotating speed of the motor so as to achieve the function of changing the motor rotating speed and maintain the lowest torque of the motor to increase the flexibility of the motor speed control.

Motor driving device for adjusting motor speed and setting the lowest rotating speed and the driving method thereof

A motor driving apparatus is disclosed herein and includes a control unit, a soft-start unit and an output unit. When power-up or lock release situation, an external PWM driving signal is inputted to the soft-start unit, the soft-start unit generates an internal PWM driving signal and a power-up initial signal; after the power-up initial signal is generated, the control unit transmitting a motor rotation signal to the soft-start unit; when the soft-start unit counts a plurality of the motor rotation signal, the soft-start unit selects the external PWM driving signal or the internal PWM driving signal to output to the output unit.

Soft-start and soft-lock start on motor driving apparatus

A pulse width modulation (PWM) module is configured to adjust the input PWM control signal and the motor can be implemented in different rotation speed to enhance the flexibility of the implementation of the motor when the PWM control signals are the same. In addition, the PWM modulation block in the present invention includes a PWM direction control circuit, a PWM vector transfer circuit and a PWM signal generation circuit. Apparently, the PWM modulation block of the present invention is connected to a PWM control signal inputted by an external system and an external adjustment apparatus; by setting up the adjustment apparatus, the vector and the modulation direction of the PWM control signal can be adjusted, and the duty cycle of the PWM control signal can also be adjusted.

Growing community of inventors

Taipei, Taiwan

Kuo-Yung Yu