公开(公告)号：US20170250635A1

公开(公告)日：2017-08-31

申请号：US15521799

申请日：2015-11-30

Applicant: China University of Mining and Technology

Inventor： Hao CHEN ,  He CHENG ,  Zhou YANG ,  Qing WANG ,  Qianlong WANG ,  Xing WANG

IPC: H02P6/24 ,  G05B19/416 ,  H02P25/086

CPC classification number: H02P6/24 ,  G05B19/416 ,  G05B2219/37312 ,  H02P21/20 ,  H02P21/36 ,  H02P25/08 ,  H02P25/086

Abstract: A braking torque closed-loop control system and method for a switch reluctance motor. The closed-loop control system comprises a torque regulator, a mode selector, a current regulator, an angle optimization controller and a torque estimator. On the basis of the rotating speed of the motor, the mode selector implements a phase current soft chopper control in a low rotating speed region and an angle position control in a high rotating speed region. The current regulator performs soft chopper hysteretic current regulation. The angle optimization controller optimizes a turn-on angle and a turn-off angle of a power converter master switch to reduce torque pulsation and improve braking energy feedback efficiency. The torque estimator conducts an on-line estimation of an actual braking torque estimated value of the motor based on an actual phase voltage and current of the motor to achieve braking torque signal feedback.

公开(公告)号：US20170324358A1

公开(公告)日：2017-11-09

申请号：US15533878

申请日：2015-08-20

Applicant: China University of Mining and Technology

Inventor： Hao CHEN ,  Guoqiang HAN ,  He CHENG ,  Qianlong WANG ,  Qing WANG ,  Xing WANG

IPC: H02P6/16

CPC classification number: H02P6/16 ,  H02P25/086

Abstract: A fault-tolerant control method for a position sensor of a switched reluctance motor, if the position sensor of the switched reluctance motor runs without a fault, detecting, in real time, four equal-interval or equal-angle continuous edge pulses of an output signal of the position sensor, the fourth edge pulse being the current edge pulse, and detecting time intervals (T1, T2, T3) between each two adjacent edge pulses sequentially, thereby calculating a time interval (T4) between the current edge pulse and a next edge pulse following the current edge pulse. If the position sensor of the switched reluctance motor fails, and the next edge pulse following the current edge pulse is lost, reconstructing the next edge pulse after the interval time (T4) of the current edge pulse of the output signal of the position sensor. The method can be used, when one or more position sensors of a rotatory and linear switched reluctance motor having various phases and various topology structures fail, to reconstruct an edge pulse after lost.

公开(公告)号：US20170187314A1

公开(公告)日：2017-06-29

申请号：US15300102

申请日：2015-10-16

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Hao CHEN ,  He CHENG ,  Zhou YANG ,  Qing WANG ,  Qianlong WANG ,  Weilong HUANG

IPC: H02P25/08 ,  H02P6/10

CPC classification number: H02P25/08 ,  H02P6/08 ,  H02P6/10 ,  H02P25/086

Abstract: A switch reluctance motor wide speed-regulation range cross-control method, the switch reluctance motor wide speed-regulation range control system consisting of a revolving speed regulator, a current chopper controller, an angle position controller, a chopper counter, a comparison selector and two resettable constant registers; the chopper counter counts the current chopping number of each electrical period, and according to the comparison result between a counting value of the chopper counter and a constant value set by the two constant registers, the comparison selector selects the current chopper controller or the angle positon controller, such that when in the three phases of low revolving speed, medium revolving speed and high revolving speed or in the runtime of acceleration, deceleration and uniform velocity, the current chopper controller and the angle positon controller can automatically switch, and seamlessly connect without being affected by load change, and switching from a turn-on angle to a turn-off angle will not cause fluctuation of torque or revolving speed of a switch reluctance motor, thus the switch reluctance motor system runs stably and has good value for engineering application.