公开(公告)号：WO2008000264A1

公开(公告)日：2008-01-03

申请号：PCT/DK2007/000315

申请日：2007-06-28

Applicant: DANFOSS COMPRESSORS GMBH ,  CHRISTENSEN, Nils ,  THOMSEN, Rune

Inventor： CHRISTENSEN, Nils ,  THOMSEN, Rune

IPC: H02M3/158

CPC classification number: H02M7/53871

Abstract: A method for driving an inductive load (A, B, C) arranged in an electrical circuit (1 ) further comprising at least two switching elements (T 1 T 6 ) and a DC power source (3) having a set of terminals. The method comprises the steps of closing a switching element, thereby connecting the inductive load to the terminals, opening the switching element, thereby disconnecting the inductive load, closing a second switching element, thereby connecting the inductive load to a current sink in order to allow a demagnetisation current in the inductive load to decay, and opening the second switching element when the demagnetisation current has decayed to a minimum level. Using this method the demagnetisation current does not have to decay via a diode. Thereby energy is not dissipated in a diode, and the efficiency of the circuit is thereby improved. Furthermore, the requirements to the components of the electrical circuit are reduced, and it is thereby possible to use less expensive components.

Abstract translation: 一种用于驱动布置在电路（1）中的电感负载（A，B，C）的方法，还包括至少两个开关元件（T 1> T 6）和 具有一组端子的直流电源（3）。 该方法包括以下步骤：关闭开关元件，从而将感性负载连接到端子，打开开关元件，从而断开感性负载，闭合第二开关元件，从而将感性负载连接到电流接收器，以便允许 电感负载中的消磁电流衰减，并且当去磁电流衰减到最小水平时打开第二开关元件。 使用这种方法，去磁电流不必通过二极管衰减。 由此，能量不会在二极管中耗散，从而提高了电路的效率。 此外，减少对电路部件的要求，从而可以使用较便宜的部件。