Patents by Inventor Zhiwang CHEN

Zhiwang CHEN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fan device, air flow adjustment device and air volume control method thereof
    Patent number: 10738790
    Abstract: 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.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: August 11, 2020
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Chiping Sun, Shinghin Yeung, Haibo Jiang, Yunlong Jiang, Guodong Liu, Zhiwang Chen
  • FAN DEVICE, AIR FLOW ADJUSTMENT DEVICE AND AIR VOLUME CONTROL METHOD THEREOF
    Publication number: 20180209433
    Abstract: 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.
    Type: Application
    Filed: January 22, 2018
    Publication date: July 26, 2018
    Inventors: Chiping SUN, Shinghin YEUNG, Haibo JIANG, Yunlong JIANG, Guodong LIU, Zhiwang CHEN