Johnson Electric International Ag

Yunlong Jiang

Chiping Sun

Haibo Jiang

Ken Wong

Shinghin Yeung

Qiubao Wang

Enhui Wang

Fei Xin

Shujuan Huang

Guodong Liu

Xiuwen Yang

Zhiwang Chen

A motor-driven fan device includes a motor, a processor, a storage with a lookup table stored therein, and a speed detection unit. The processor queries the lookup table or calculates to acquire the target driving voltage and a corresponding target rotating speed of the motor. When the rotating speed difference is not within the range of the preset rotating speed difference, the processor repeatedly adds a gain value to the target driving voltage to acquire a new target driving voltage, acquires the actual rotating speed and the target rotating speed, and determines whether the rotating speed difference is within the range of the preset rotating speed difference. The processor maintains the operation of the motor at the target rotating speed at that point by using the constant speed control method when the absolute value of rotating speed difference is within the range of the preset rotating speed difference.

Fan device, air flow adjustment device and air volume control method thereof

A motor-driven integrated circuit comprises a PWM output unit and an overcurrent comparator coupled with the PWM output unit. The overcurrent comparator receives a detection signal and compares the detection signal with a reference value. When the detection signal is larger than the reference value, the overcurrent comparator outputs an overcurrent protection signal to control the PWM output unit enter an overcurrent protection mode.

Motor driven integrated circuit, motor device, and application apparatus

A motor and an application apparatus are provided. The motor includes a stator having a stator core and a stator winding wound on the stator core, a rotor, a magnetic sensor configured to detect a magnetic field polarity of the rotor and output a corresponding signal, and a motor driving circuit configured to drive the rotor to rotate with respect to the stator based on the signal output from the magnetic sensor. At a rest position of the rotor, the magnetic sensor is arranged with an advance angle with respect to a polar axis of the rotor, to make the motor have a high starting torque.

Motor and application apparatus utilizing the same

A motor driver integrated circuit comprises a central processing unit, a memory, and a multiple-time programmable memory. The multiple-time programmable memory is configured to store a motor driver program, the memory has a capacity larger than or equal to a capacity of the multiple-time programmable memory. When the motor driver integrated circuit is powered or reset, the central processing unit copies the driven program from the multiple-time programmable memory to the memory. The motor driver integrated circuit is low in cost. The present invention also provides a motor device having the motor driver integrated circuit.

Motor-driven integrated circuit, motor device, and application apparatus

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Shenzhen, China

Yunlong Jiang