公开(公告)号：US06434505B1

公开(公告)日：2002-08-13

申请号：US09688468

申请日：2000-10-16

申请人： Michael Koepke ,  Eberhard Schröder ,  Uwe Varchmin

发明人： Michael Koepke ,  Eberhard Schröder ,  Uwe Varchmin

IPC分类号： G01K572

CPC分类号： H02H6/005 ,  G01K7/42 ,  H02H7/0852

摘要： The invention relates to a method for determining the winding temperature (TW) of the stator winding of a three-phase AC motor, in particular a pole-changeable asynchronous motor. For determining the winding temperature (TW) of the stator winding of three-phase AC motors that have an unfavorable ratio of the active power to the dissipation power and react sensitively to temperature changes and changes in a main voltage, and for readily determining the heat dissipation power (PV) from the winding temperature (TW) of the stator winding, it is proposed to determine the reference temperature (TG) and the motor current (IM) simultaneously at consecutive points in time, and to determine the winding temperature (TW) by calculating step-by-step sequentially the change in the winding temperature (TW) at a point in time (tn) and adding this change to the winding temperature (TW) of the immediately preceding point in time (tn−1). The change of the winding temperature (TW) associated with a point in time (tn) is proportional to the electrical heat dissipation power (PV) that is converted into heat in the stator winding at the point in time (tn) and to the temperature difference between the reference temperature (TG) of the housing at that point in time (tn) and the winding temperature (TW) at the immediately preceding point in time (tn−1). The winding temperature (TW) of the immediately preceding point in time (tn−1) is also used for calculating the heat dissipation power (PV).

摘要翻译： 本发明涉及一种用于确定三相交流电动机的定子绕组的绕组温度（TW）的方法，特别是可变极性异步电动机。 为了确定三相交流电动机的定子绕组的绕组温度（TW），其具有有功功率与耗散功率的不利比，并且敏感地对温度变化和主电压的变化作出反应，并且用于容易地确定热量 从定子绕组绕组温度（TW）的功耗（PV），建议在连续的时间点同时确定参考温度（TG）和电动机电流（IM），并确定绕组温度（TW ）通过依次逐步计算在一个时间点（tn）的绕组温度（TW）的变化并将其改变为紧接在前的时间点（tn-1）的绕组温度（TW）。 与时间点（tn）相关联的绕组温度（TW）的变化与在时间点（tn）的定子绕组中转换成热量的电热耗散功率（PV）成正比，并且与温度 在该时间点（tn）的壳体的参考温度（TG）与紧接在前的时间点（tn-1）的绕组温度（TW）之间的差值。 前一时刻（tn-1）的绕组温度（TW）也用于计算散热功率（PV）。