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1.发明授权Current limiting control method for diode neutral-point-clamped three-level inverter and related circuit 有权二极管中性点钳位三电平逆变器及相关电路的限流控制方法公开(公告)号：US09531185B2
公开(公告)日：2016-12-27
申请号：US14224953
申请日：2014-03-25
Applicant: Huawei Technologies Co., Ltd.
Inventor： Kelei Liu , Fuzhou Wang , Yihang Lv
Abstract: The present disclosure discloses a current limiting control method for a diode neutral-point-clamped three-level inverter and a related circuit. When a current in switching tubes is lowered to a value not greater than a first preset current value, the current limiting control method for a diode neutral-point-clamped three-level inverter and the related circuit drive an inside switching tube of the switching tubes to be turned on; after a first delay time, drive another inside switching tube to be turned on; after a second delay time, control an inside switching tube to be turned off and the other inside switching tube to be normally turned on; and control all the switching tubes to be turned on or off according to a control time sequence of the diode neutral-point-clamped three-level inverter circuit.
Abstract translation: 本公开公开了一种用于二极管中性点钳位三电平逆变器和相关电路的限流控制方法。 当开关管中的电流降低到不大于第一预设电流值的值时，二极管中性点钳位三电平逆变器的电流限制控制方法和相关电路驱动开关管的内部开关管 被打开 在第一个延迟时间后，驱动另一个内部开关管打开; 在第二延迟时间之后，控制内部开关管被切断，另一个内部开关管正常导通; 并根据二极管中性点钳位三电平逆变器电路的控制时间顺序控制所有开关管的导通或截止。
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公开(公告)号：US20170133925A1
公开(公告)日：2017-05-11
申请号：US15414375
申请日：2017-01-24
Applicant: Huawei Technologies Co., Ltd.
Inventor： Kelei Liu
CPC classification number: H02M1/32 , H02H3/08 , H02H7/122 , H02H9/001 , H02M1/08 , H02M7/537 , H02M2001/0009
Abstract: A overcurrent protection system includes an inductor current detection circuit configured to detect an inductor current in the inverter circuit to obtain an inductor current detection value, a pulse-by-pulse current limit enable signal generation circuit connected to the inductor current detection circuit and to the pulse-by-pulse current limit enable signal generation circuit, and configured to perform turn-off control on a switching transistor in the inverter circuit according to the pulse-by-pulse current limit enable signal, and a first instant-feeding load impact signal generation circuit connected to the pulse-by-pulse current limit enable signal generation circuit and configured to detect an inductor voltage in the inverter circuit to obtain an inductor voltage detection value, and generate an instant-feeding load impact signal in response to determining that the inductor voltage detection value reaches a preset voltage threshold.
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公开(公告)号：US09906120B2
公开(公告)日：2018-02-27
申请号：US15414375
申请日：2017-01-24
Applicant: Huawei Technologies Co., Ltd.
Inventor： Kelei Liu
CPC classification number: H02M1/32 , H02H3/08 , H02H7/122 , H02H9/001 , H02M1/08 , H02M7/537 , H02M2001/0009
Abstract: A overcurrent protection system includes an inductor current detection circuit configured to detect an inductor current in the inverter circuit to obtain an inductor current detection value, a pulse-by-pulse current limit enable signal generation circuit connected to the inductor current detection circuit and to the pulse-by-pulse current limit enable signal generation circuit, and configured to perform turn-off control on a switching transistor in the inverter circuit according to the pulse-by-pulse current limit enable signal, and a first instant-feeding load impact signal generation circuit connected to the pulse-by-pulse current limit enable signal generation circuit and configured to detect an inductor voltage in the inverter circuit to obtain an inductor voltage detection value, and generate an instant-feeding load impact signal in response to determining that the inductor voltage detection value reaches a preset voltage threshold.
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