公开(公告)号：US09941873B2

公开(公告)日：2018-04-10

申请号：US14567461

申请日：2014-12-11

Applicant: ABB Oy

Inventor： Ignacio Lizama ,  Rodrigo Alonso Alvarez Valenzuela ,  Steffen Bernet ,  Matti Laitinen

IPC: H03K17/04 ,  H03K17/042 ,  H03K17/082 ,  H03K17/12

CPC classification number: H03K17/042 ,  H03K17/082 ,  H03K17/12 ,  H03K2217/0027

Abstract: A method and apparatus are provided for balancing currents of two or more parallel-connected power semiconductor switches during an on-state of the switches. A control terminal of each switch is driven by a driver unit. The method includes determining ratios between the currents through the switches. For each switch, the method includes controlling the voltage at the control terminal on the basis of the ratios by controlling a level of a supply voltage of the driver unit of the switch, and after a turn-on commutation transient, modulating the output of the driver unit. The duty cycle of the modulation is controlled to minimize the time required for the transition of the voltage at the control terminal from the one voltage level to another.

公开(公告)号：US20150162902A1

公开(公告)日：2015-06-11

申请号：US14567461

申请日：2014-12-11

Applicant: ABB Oy

Inventor： Ignacio LIZAMA ,  Rodrigo Alonso Alvarez Valenzuela ,  Steffen Bernet ,  Matti Laitinen

IPC: H03K17/042

CPC classification number: H03K17/042 ,  H03K17/082 ,  H03K17/12 ,  H03K2217/0027

Abstract: A method and apparatus are provided for balancing currents of two or more parallel-connected power semiconductor switches during an on-state of the switches. A control terminal of each switch is driven by a driver unit. The method includes determining ratios between the currents through the switches. For each switch, the method includes controlling the voltage at the control terminal on the basis of the ratios by controlling a level of a supply voltage of the driver unit of the switch, and after a turn-on commutation transient, modulating the output of the driver unit. The duty cycle of the modulation is controlled to minimize the time required for the transition of the voltage at the control terminal from the one voltage level to another.

Abstract translation: 提供一种方法和装置，用于在开关的导通状态期间平衡两个或多个并联功率半导体开关的电流。 每个开关的控制端子由驱动器单元驱动。 该方法包括确定通过开关的电流之间的比率。 对于每个开关，该方法包括通过控制开关的驱动器单元的电源电平来控制基于比率的控制端子处的电压，并且在导通换向瞬变之后，调制输出 司机单位。 控制调制的占空比以最小化将控制端子处的电压从一个电压电平转换到另一个电压电平所需的时间。