用于动力机械设备功率和转矩测量的测功机系统主要由测功电机、测力机构及控制系统组成，广泛应用于机械传动零部件的性能测试。简述了测功机系统在当前工业领域中的重要性，概述了测功机系统的分类，并简要对比分析了各类测功机的优缺点，介绍了各类测功机系统的构成、工作原理及应用场景，总结了测功机系统几种经典的控制策略，最后介绍了测功机在变速器、齿轮箱、发动机及汽车底盘性能测试中的具体应用。

The dynamometer system for the measurement of power and torque of power machinery equipment is mainly composed of dynamometer motor, dynamometer mechanism and control system. Such systems are widely used in performance testing of mechanical transmission components. The importance of the dynamometer system in the industrial field is briefly described. The classification of dynamometer systems is summarized, and the advantages and disadvantages of all kinds of dynamometers are analyzed. The structure, principle and application scenarios of the current dynamometer systems are introduced. Several classic control strategies of dynamometer systems are summarized. Finally, the application of dynamometer in the performance test of transmission, gearbox, engine and automobile chassis is introduced.