公开(公告)号：US09520792B2

公开(公告)日：2016-12-13

申请号：US14141811

申请日：2013-12-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bo He ,  Yihang Lv ,  Weiping Jie

IPC: H02M3/335 ,  H02M3/28 ,  H02M7/487 ,  H02J1/00

CPC classification number: H02M3/335 ,  H02J1/00 ,  H02M3/285 ,  H02M3/33569 ,  H02M7/487 ,  Y02B70/1433 ,  Y10T307/707

Abstract: A staggered parallel three-level DC/DC converter and an AC/DC converter includes: at least one input power supply, N-phase three-level DC/DC circuits, N resonant inductors, N resonant capacitors, N transformers, N rectifier circuits, a first inductor, and an output circuit; one end of an i th resonant inductor is connected to an i th-phase three-level DC/DC circuit, the other end of the i th resonant inductor is connected to an excitation inductor of an i th transformer; one end of an i th resonant capacitor is connected to the i th-phase three-level DC/DC circuit, and the other end of the i th resonant capacitor is connected to the excitation inductor of the i th transformer; or one end of the first inductor is connected to the input power supply, and the other end of the first inductor is connected to the N-phase three-level DC/DC circuit; where N is an integer and is greater than or equal to 2, and i is an integer and 1≦i≦N.

Abstract translation: 交错并联三电平DC / DC转换器和AC / DC转换器包括：至少一个输入电源，N相三电平DC / DC电路，N个谐振电感器，N个谐振电容器，N个变压器，N个整流电路 ，第一电感器和输出电路; 第i个谐振电感的一端连接到i相三电平DC / DC电路，第i个谐振电感的另一端连接到第i个变压器的励磁电感器; 第i个谐振电容器的一端连接到i相三级DC / DC电路，第i个谐振电容器的另一端连接到第i个变压器的励磁电感器; 或者第一电感器的一端连接到输入电源，第一电感器的另一端连接到N相三电平DC / DC电路; 其中N是整数并且大于或等于2，i是整数，1≤i≤N。

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

IPC: H02M1/32 ,  H02H7/122 ,  H02M7/487 ,  H02H9/02

CPC classification number: H02H7/122 ,  H02H9/02 ,  H02M1/32 ,  H02M7/487

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。

公开(公告)号：US20140334199A1

公开(公告)日：2014-11-13

申请号：US14328992

申请日：2014-07-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bo He ,  Dianbo Fu ,  Yihang Lv

IPC: H02M5/458

CPC classification number: H02M5/4585 ,  H02M5/458 ,  H02M7/487

Abstract: A five-level power converter and a control method for the same are provided. The five-level power converter includes an inverter and at least a rectifier, where the rectifier includes at least one rectifier control circuit and four capacitors which are divided into two groups, each with two capacitors connected in parallel, where a first end of a first capacitor to a fourth capacitor is grounded; the rectifier control circuit is configured to input a current to a second end of the first capacitor to the fourth capacitor; and a polarity of charges accumulated at the second ends of the first capacitor and the second capacitor is opposite to a polarity of charges accumulated at the second ends of the third capacitor and the fourth capacitor; and the inverter includes a discharge control circuit, and a first inductor unit and a first load connected in series.

Abstract translation: 提供一种五电平转换器及其控制方法。 五电平功率转换器包括逆变器和至少一个整流器，其中整流器包括至少一个整流器控制电路和四个分为两组的电容器，每个电容器具有并联连接的两个电容器，其中第一端 电容到第四个电容器接地; 整流器控制电路被配置为向第四电容器输入电流到第一电容器的第二端; 并且在第一电容器和第二电容器的第二端累积的电荷的极性与在第三电容器和第四电容器的第二端累积的电荷的极性相反; 逆变器包括放电控制电路和串联连接的第一电感器单元和第一负载。