公开(公告)号：US20150131345A1

公开(公告)日：2015-05-14

申请号：US14540647

申请日：2014-11-13

Applicant: ABB OY

Inventor： Mikko PURHONEN ,  Tero VIITANEN

IPC: H02M7/44

CPC classification number: H02M7/44 ,  H02J3/385 ,  H02M5/4505 ,  H02M7/493 ,  Y02E10/58

Abstract: The present disclosure discloses a method and an apparatus implementing the method for minimising a circulating current of parallel-connected inverters. The method can include, for at least one parallel-connected inverter, measuring a common-mode voltage of the inverter, and controlling a cycle length of the switching cycle on the basis of the common-mode voltage.

Abstract translation: 本公开公开了一种实现用于使并联逆变器的循环电流最小化的方法和装置。 对于至少一个并联连接的逆变器，该方法可以包括测量逆变器的共模电压，并且基于共模电压来控制开关周期的周期长度。

公开(公告)号：US20140268940A1

公开(公告)日：2014-09-18

申请号：US14211048

申请日：2014-03-14

Applicant: ABB Oy

Inventor： Tero VIITANEN ,  Mikko SAARINEN

IPC: H02M7/797

CPC classification number: H02M7/797 ,  H02H7/1225 ,  H02M1/32 ,  H02M7/487 ,  H02M7/538 ,  H02M7/5387 ,  H02M7/53873 ,  H02M7/5395

Abstract: Exemplary embodiments are directed to a method for controlling a switching branch of a three-level converter to enter a stop state. The switching branch including a first semiconductor switch and a second semiconductor switch, a first diode and a second diode, a third semiconductor switch and a fourth semiconductor switch, a third diode, and a fourth diode, a fifth semiconductor switch and a sixth semiconductor switch, a fifth diode, and a sixth diode, and a manner of controlling the semiconductor switches. When the switching branch is set to enter a stop state, current flowing in a main circuit of the switching branch is transferred in a controlled manner to diodes that conduct the current, when all the semiconductor switches of the main circuit of the converter are turned OFF.

Abstract translation: 示例性实施例涉及一种用于控制三电平转换器的开关支路进入停止状态的方法。 所述开关支路包括第一半导体开关和第二半导体开关，第一二极管和第二二极管，第三半导体开关和第四半导体开关，第三二极管和第四二极管，第五半导体开关和第六半导体开关 ，第五二极管和第六二极管，以及控制半导体开关的方式。 当开关分支设定为进入停止状态时，当开关分支的主电路中的所有半导体开关全部转换为OFF时，将流过开关支路的主电路的电流以受控的方式传送到导通电流的二极管 。