Patents by Inventor Yigang YUAN

Yigang YUAN 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).

  • Publication number: 20200300907
    Abstract: An analog-circuit fault diagnosis method based on continuous wavelet analysis and an ELM network comprises: data acquisition: performing data sampling on output responses of an analog circuit respectively through Multisim simulation to obtain an output response data set; feature extraction: performing continuous wavelet analysis by taking the output response data set of the circuit as training and testing data sets respectively to obtain a wavelet time-frequency coefficient matrix, dividing the coefficient matrix into eight sub-matrixes of the same size, and performing singular value decomposition on the sub-matrixes to calculate a Tsallis entropy for each sub-matrix to form feature vectors of corresponding faults; and fault classification: submitting the feature vector of each sample to the ELM network to implement accurate and quick fault classification.
    Type: Application
    Filed: January 6, 2017
    Publication date: September 24, 2020
    Applicant: HEFEI UNIVERSITY OF TECHNOLOGY
    Inventors: Yigang HE, Wei HE, Qiwu LUO, Zhigang LI, Tiancheng SHI, Tao WANG, Zhijie YUAN, Deqin ZHAO, Luqiang SHI, Liulu HE
  • Publication number: 20200295626
    Abstract: A motor and stator include first and second laminations arranged adjacently in the axial direction. The laminations include sub-yoke parts and first tooth parts. The sub-yoke parts are spliced through a yoke engaging part to form a substantially annular yoke part. The tooth parts are assembled on an inner edge of the yoke part through a tooth engaging part. A first tooth engaging part and a second tooth engaging part are superposed in the axial direction, the first tooth engaging part being different from the second tooth engaging part. A method of manufacturing a stator for a motor is also disclosed.
    Type: Application
    Filed: January 10, 2020
    Publication date: September 17, 2020
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Yigang YUAN, Chuan DENG, Joy GONG, Guohua DU
  • Publication number: 20200244113
    Abstract: A stator for a motor includes laminations arranged axially adjacently. A first lamination includes sub-yoke parts and tooth parts. The sub-yoke parts are spliced through a first yoke engaging part to form an annular first yoke part. The first tooth parts are assembled on an inner edge of the first yoke part through a first tooth engaging part. The second lamination includes sub-yoke parts and tooth parts. The sub-yoke parts are spliced through a second yoke engaging part to form an annular second yoke part. The second tooth parts are assembled on an inner edge of the second yoke part through a second tooth engaging part. The first and second tooth engaging parts are superposed in the axial direction. A method of manufacturing a stator for a motor is also described.
    Type: Application
    Filed: January 10, 2020
    Publication date: July 30, 2020
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Chuan DENG, Yigang YUAN, Guohua DU, Xusheng ZHANG, Joy GONG
  • Publication number: 20200240850
    Abstract: A method for estimating the junction temperature on-line on an insulated gate bipolar transistor (IGBT) power module, including the following steps. Estimate the junction temperature by the temperature sensitive electrical parameter method, set the space thermal model of the extended state, and apply the Kalman filter to the junction temperature estimation. The temperature sensitive electrical parameter method estimates the junction temperature of the IGBT power module in real time, selects the IGBT conduction voltage drop VCE(ON) as the temperature sensitive electrical parameter, and provides a VCE(ON) on-line measuring circuit. The power loss of the diode and IGBT and the estimated value of junction temperature obtained by the temperature sensitive electrical parameter method are taken as the input of the Kalman filter, and measurement noise and process noise are considered to obtain an optimal estimated value of junction temperature.
    Type: Application
    Filed: November 20, 2019
    Publication date: July 30, 2020
    Applicant: WUHAN UNIVERSITY
    Inventors: Yigang HE, Kaiwei LI, Weibo YUAN, Liulu HE, Yuzheng GUO, Hui ZHANG
  • Publication number: 20200235642
    Abstract: A motor rotor may include a body having axially extending first and second magnets embedded into the body, the first magnet and the second magnet being arranged at an angle and spaced apart by an axially extending magnetic shielding component. The first magnet includes a first surface away from a central axis of the rotor body and a second surface facing the central axis. The second magnet includes a third surface away from the central axis and a fourth surface facing the central axis, wherein the first surface and the third surface and extension surfaces thereof define a first area of the body part away from the central axis and a second area of the body part close to the central axis.
    Type: Application
    Filed: January 10, 2020
    Publication date: July 23, 2020
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Chuan DENG, Yigang YUAN, Guohua DU, Joy GONG
  • Patent number: 10706332
    Abstract: An analog circuit fault mode classification method comprises the following implementation steps: (1) collecting M groups of voltage signal sample vectors Vij to each of fault modes Fi of the analog circuit by using a data collection board; (2) sequentially extracting fault characteristic vectors VijF of the voltage signal sample vectors Vij by using subspace projection; (3) standardizing the extracted fault characteristic vectors VijF to obtain standardized fault characteristic vectors; (4) constructing a fault mode classifier based on a support vector machine, inputting the standardized fault characteristic vectors, performing learning and training on the classifier, and determining structure parameters of the classifier; and (5) completing determination of fault modes according to fault mode determination rules. The fault mode classifier of the present invention is simple in learning and training and reliable in mode classification accuracy.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: July 7, 2020
    Assignee: HEFEI UNIVERSITY OF TECHNOLOGY
    Inventors: Lifen Yuan, Shuai Luo, Yigang He, Peng Chen, Chaolong Zhang, Ying Long, Zhen Cheng, Zhijie Yuan, Deqin Zhao
  • Publication number: 20200212734
    Abstract: An electric machine operable as a motor or generator includes a stator having a body portion substantially in the shape of a hollow column with an outer wall and an inner wall. The body portion has a plurality of first slots and a plurality of second slots each running through the body portion in a longitudinal direction. The plurality of first slots are distributed in a circumferential direction between the outer wall and the inner wall, and the first slots are circumferentially closed slots. The plurality of second slots are distributed in the circumferential direction between the first slots and the inner wall, and the second slots are circumferentially closed slots and are spaced apart from the first slots.
    Type: Application
    Filed: December 27, 2019
    Publication date: July 2, 2020
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Guohua DU, Yigang YUAN, Chuan DENG, Xusheng ZHANG, Joy GONG
  • Publication number: 20200169128
    Abstract: A stator core for an electric motor may include a main body part formed by a plurality of stacked electromagnetic steel sheets, the main body part being provided with at least a first through hole extending axially with a first pin located in the first through hole. A first end cover is located at a first end of the main body part and connected to a first pin end of the first pin. A second end cover is located at a second end of the main body part and connected to a second pin end of the first pin. The connections of the first end cover and the second end cover to the first pin generate tensile stresses in the main body part to reduce core losses.
    Type: Application
    Filed: November 22, 2019
    Publication date: May 28, 2020
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Chuan DENG, Yigang YUAN, Guohua DU, Xusheng ZHANG, Joy GONG
  • Patent number: 10539613
    Abstract: An analog circuit fault diagnosis method using a single testable node comprises the following steps: (1) obtaining prior sample data vectors under each fault mode; (2) computing a statistical average of the prior sample data vectors under each of the fault modes; (3) decomposing a signal by an orthogonal Haar wavelet filter set; (4) extracting the feature factor of the prior sample fault modes; (5) extracting a fault-mode-to-be-tested feature factor; (6) computing a correlation coefficient matrix and correlation metric parameters between the feature factor of the prior sample fault modes and the feature factor of the fault-mode-to-be-tested; and (7) determining a fault mode according to a maximal correlation principle by comparing the correlation metric parameters.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: January 21, 2020
    Assignee: HEFEI UNIVERSITY OF TECHNOLOGY
    Inventors: Yigang He, Lifen Yuan, Lei Wu, Yesheng Sun, Chaolong Zhang, Ying Long, Zhen Cheng, Zhijie Yuan, Deqin Zhao