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公开(公告)号：US20200295572A1
公开(公告)日：2020-09-17
申请号：US16809750
申请日：2020-03-05
发明人： Kaiwei Yao , Zhiyuan Shen
摘要： An apparatus for photovoltaic power generation can include: an inverter; and at least one photovoltaic optimizer, where input terminals of each photovoltaic optimizer are coupled to output terminals of a photovoltaic panel, and output terminals of each photovoltaic optimizer are coupled in series with each other between input terminals of the inverter; where a maximum power point of the photovoltaic panel is tracked in accordance with an input voltage of the inverter when the photovoltaic optimizer operates in a first mode; and the maximum power point of the photovoltaic panel is tracked in accordance with an output voltage of the photovoltaic panel when the photovoltaic optimizer operates in a second mode.
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公开(公告)号：US10591552B2
公开(公告)日：2020-03-17
申请号：US16217345
申请日：2018-12-12
发明人： Zhiyuan Shen , Chen Zhao
摘要： A parameter identification circuit for a digital power converter having an inductor and a capacitor, can include: an inductor parameter circuit that receives an inductor current of the inductor, a capacitor voltage of the capacitor, a duty cycle in a start-up stage, and a predetermined inductor current, where the inductor parameter circuit obtains an inductor parameter according to an integrated value of the capacitor voltage, an integrated value of the duty cycle in the start-up stage, and the predetermined inductor current, when the inductor current rises to a level of the predetermined inductor current; and a capacitor parameter circuit that receives the inductor current, the capacitor voltage, and a predetermined capacitor voltage, where the capacitor parameter circuit obtains a capacitor parameter according to an integrated value of the inductor current and the predetermined capacitor voltage when the capacitor voltage rises to a level of the predetermined capacitor voltage.
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公开(公告)号：US10191122B2
公开(公告)日：2019-01-29
申请号：US15698870
申请日：2017-09-08
发明人： Zhiyuan Shen , Chen Zhao
摘要： A parameter identification circuit for a digital power converter having an inductor and a capacitor, can include: an inductor parameter circuit that receives an inductor current of the inductor, a capacitor voltage of the capacitor, a duty cycle in a start-up stage, and a predetermined inductor current, where the inductor parameter circuit obtains an inductor parameter according to an integrated value of the capacitor voltage, an integrated value of the duty cycle in the start-up stage, and the predetermined inductor current, when the inductor current rises to a level of the predetermined inductor current; and a capacitor parameter circuit that receives the inductor current, the capacitor voltage, and a predetermined capacitor voltage, where the capacitor parameter circuit obtains a capacitor parameter according to an integrated value of the inductor current and the predetermined capacitor voltage when the capacitor voltage rises to a level of the predetermined capacitor voltage.
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公开(公告)号：US20170110892A1
公开(公告)日：2017-04-20
申请号：US15283551
申请日：2016-10-03
发明人： Hejinsheng Cao , Zhiyuan Shen
IPC分类号： H02J7/00
CPC分类号： H02J7/0014 , H02J7/0021 , H02J7/0077
摘要： A method of balancing battery power can include: determining batteries to be balanced and directions of balance currents according to charge and discharge states and power states of the batteries, where each of the power states includes a state of charge, a remaining capacity, and a capacity to be charged; determining a reference of the balance current based on controlling temperatures of the batteries to be balanced to be lower than a temperature threshold when the SOCs of the batteries to be balanced are lower than a predetermined threshold; and balancing power of the batteries to be balanced according to the directions of the balance currents and the reference.
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公开(公告)号：US11581812B2
公开(公告)日：2023-02-14
申请号：US16894815
申请日：2020-06-07
发明人： Kaiwei Yao , Zhiyuan Shen
IPC分类号： H02M3/158 , G01R19/165 , G01R19/175 , H02M1/084 , H02M1/32 , H02M1/00
摘要： A method of controlling a multi-phase power converter having a plurality of power stage circuits coupled in parallel, can include: obtaining a load current of the multi-phase power converter; enabling corresponding power stage circuits to operate in accordance with the load current, such that a switching frequency is maintained within a predetermined range when the load current changes; and controlling the power stage circuits to operate under different modes in accordance with the load current, such that the switching frequency is maintained within the predetermined range when the load current changes.
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公开(公告)号：US10027135B2
公开(公告)日：2018-07-17
申请号：US15262781
申请日：2016-09-12
发明人： Zhiyuan Shen
IPC分类号： H02J7/00
摘要： An apparatus for balancing battery power can include: a battery selection circuit coupled to N batteries, where the battery selection circuit is configured to couple one of the N batteries to a charge and discharge port, where N is an integer greater than 1; a bi-directional power converter having a first terminal coupled to the charge and discharge port, and a second terminal coupled to a storage capacitor; N detection circuits corresponding to the N batteries, where each of the N detection circuits is configured to detect a state of a corresponding of the N batteries; and a control circuit configured to control the battery selection circuit to couple a selected battery to the charge and discharge port, and to charge or discharge the selected battery through the bi-directional power converter to maintain a voltage of the storage capacitor to be within a predetermined range.
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公开(公告)号：US11652417B2
公开(公告)日：2023-05-16
申请号：US17704237
申请日：2022-03-25
发明人： Zhiyuan Shen , Kaiwei Yao
CPC分类号： H02M3/1586 , H02M3/1584 , H02M1/0025
摘要： A concentration control circuit can include: a voltage feedback circuit configured to generate a current reference signal representing an error between a voltage reference signal and an output voltage feedback signal shared by each of a plurality of power stage circuits of a multi-phase power converter to adjust a respective phase current; and a clock signal generation circuit configured to generate a clock signal to adjust at least one of switching frequency and phase of each of the power stage circuits, where the clock signal is adjusted in accordance with a change of the current reference signal.
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公开(公告)号：US20230123031A1
公开(公告)日：2023-04-20
申请号：US18086874
申请日：2022-12-22
发明人： Kaiwei Yao , Zhiyuan Shen
IPC分类号： H02M3/158 , G01R19/165 , G01R19/175 , H02M1/084 , H02M1/32
摘要： A method of controlling a multi-phase power converter having a plurality of power stage circuits coupled in parallel, can include: obtaining a load current of the multi-phase power converter; enabling corresponding power stage circuits to operate in accordance with the load current, such that a switching frequency is maintained within a predetermined range when the load current changes; and controlling the power stage circuits to operate under different modes in accordance with the load current, such that the switching frequency is maintained within the predetermined range when the load current changes.
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公开(公告)号：US11114859B2
公开(公告)日：2021-09-07
申请号：US16809750
申请日：2020-03-05
发明人： Kaiwei Yao , Zhiyuan Shen
摘要： An apparatus for photovoltaic power generation can include: an inverter; and at least one photovoltaic optimizer, where input terminals of each photovoltaic optimizer are coupled to output terminals of a photovoltaic panel, and output terminals of each photovoltaic optimizer are coupled in series with each other between input terminals of the inverter; where a maximum power point of the photovoltaic panel is tracked in accordance with an input voltage of the inverter when the photovoltaic optimizer operates in a first mode; and the maximum power point of the photovoltaic panel is tracked in accordance with an output voltage of the photovoltaic panel when the photovoltaic optimizer operates in a second mode.
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公开(公告)号：US20190113583A1
公开(公告)日：2019-04-18
申请号：US16217345
申请日：2018-12-12
发明人： Zhiyuan Shen , Chen Zhao
摘要： A parameter identification circuit for a digital power converter having an inductor and a capacitor, can include: an inductor parameter circuit that receives an inductor current of the inductor, a capacitor voltage of the capacitor, a duty cycle in a start-up stage, and a predetermined inductor current, where the inductor parameter circuit obtains an inductor parameter according to an integrated value of the capacitor voltage, an integrated value of the duty cycle in the start-up stage, and the predetermined inductor current, when the inductor current rises to a level of the predetermined inductor current; and a capacitor parameter circuit that receives the inductor current, the capacitor voltage, and a predetermined capacitor voltage, where the capacitor parameter circuit obtains a capacitor parameter according to an integrated value of the inductor current and the predetermined capacitor voltage when the capacitor voltage rises to a level of the predetermined capacitor voltage.
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