Determination of efficiency of permanent magnet synchronous machines from summation of losses
Determination of efficiency of permanent magnet synchronous machines from summation of losses
复制标题
根据损耗总和确定永磁同步电机的效率
DOI：
10.1109/speedam.2014.6871917
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
A. Binder
中科院分区：
文献类型：
--
作者：
B. Deusinger;Marcel Lehr;A. Binder
如果效率超过95%，则通过直接测量来确定电机的效率通常太不精确。对于电励磁同步电机，存在一种标准化方法，通过将各个损耗相加来确定效率。这种方法需要可变励磁，因此不能用于永磁同步电机。随着永磁电机越来越多地用作风力涡轮机发电机和牵引电动机，存在对替代方法的大量需求。在该项目中，开发了一种新的程序，该程序包括通过三个不同的测量系列计算额定条件下的损耗。相应的损耗和电路图参数由开路测量、移除转子测量和纯无功电流测量确定。除了理论计算外，还使用直接效率测量来验证效率计算结果。两个检查永磁电机分数槽绕组的额定功率为45千瓦。
The determination of the efficiency of electrical machines by direct measurements is often too imprecise if the efficiency exceeds 95 %. For electrically excited synchronous machines a standardized method exists to determine the efficiency by summation of the individual losses. This method needs a variable excitation and therefore cannot be used for permanent magnet synchronous machines. As permanent magnet machines are increasingly used as wind turbine generators and traction motors, there is a large demand for an alternative method. In this project a new procedure is developed, which consists of a calculation of the losses at rated conditions via three different measurement series. The corresponding losses and circuit diagram parameters are determined from measurements at open circuit, measurements with removed rotor and measurements with pure reactive current. In addition to the theoretical calculations direct efficiency measurements are used to validate the efficiency calculation results. The two examined permanent magnet motors with fractional slot winding have a rated power of 45 kW.