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1.发明授权公开(公告)号：US11323039B2
公开(公告)日：2022-05-03
申请号：US16959001
申请日：2018-12-29
发明人： Weifeng Sun , Rongrong Tao , Hao Wang , Jinyu Xiao , Wei Su , Shen Xu , Longxing Shi
摘要： A method for improving the conversion efficiency of a CCM mode of a flyback resonant switch power supply, comprising: presetting a critical value Tset, calculating a time interval Ttap between adjacent zero points in the current connection time, outputting a shutdown signal at the zero points, and comparing the time interval Ttap with the preset critical value Tset; when Ttap>Tset, controlling the current shutdown time to be less than the shutdown time of the preceding cycle and outputting a start signal; when Ttap=0, controlling the current shutdown time to be greater than the shutdown time of the preceding cycle and outputting a start signal; and when 0
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公开(公告)号：US11557959B2
公开(公告)日：2023-01-17
申请号：US16959015
申请日：2018-12-29
发明人： Shen Xu , Minggang Chen , Hao Wang , Jinyu Xiao , Wei Su , Weifeng Sun , Longxing Shi
摘要： An automatic dead zone time optimization system in a primary-side regulation flyback power supply continuous conduction mode (CCM), including a closed loop formed by a control system, including a single output digital to analog converter (DAC) midpoint sampling module, a digital control module, a current detection module, a dead zone time calculation module and a pulse-width modulation (PWM) driving module, and a controlled synchronous rectification primary-side regulation flyback converter. A primary-side current is sampled using a DAC Sampling mechanism to calculate a secondary-side average current, so as to obtain a primary-side average current and a secondary-side average current, in the case of CCM. A secondary-side current is input into the dead zone time calculation module to obtain a reasonable dead zone time; and the PWM driving module is jointly controlled by a primary-side regulation loop and the obtained dead zone time.
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3.发明授权公开(公告)号：US11336217B2
公开(公告)日：2022-05-17
申请号：US16958868
申请日：2018-12-29
发明人： Rui Zhong , Mingshu Zhang , Sen Zhang , Jinyu Xiao , Wei Su , Weifeng Sun , Longxing Shi
摘要： A method and an apparatus for reducing noise of a switched reluctance motor, includes: supplying a PWM signal as a driving signal to a driving circuit of a switched reluctance motor; and varying a carrier frequency of the PWM signal as an operation period of the switched reluctance motor varies; if the switched reluctance motor changes phase, determining that the operation period of the switched reluctance motor varies.
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