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针对现有的航空电机测功机需要配备散热设备,占地面积大的问题,提出了一种以直流电机作为负载,与待测电机同轴连接,采用双极式可逆斩波电路和PWM控制,替代传统测功机对航空电机性能进行测试的方法,克服了传统测功机对散热设备的需求,保持了航空电机高转速、小惯性、快速响应的特点,并且通过外加可控电源解决了启动时转矩迅速加载的问题。在Matlab仿真平台下,建立系统模型并对一个直流电机进行了仿真分析,证明提出的方案加载迅速、切实可行。
In order to solve the problem that existing aerodynamic dynamometers need to be equipped with cooling equipment and cover a large area, a direct current motor is proposed as a load which is coaxially connected with the motor to be tested. A bipolar reversible chopper circuit and a PWM control , Instead of the traditional dynamometer to test the performance of the aero-motor, overcomes the traditional dynamometer’s requirement for the heat-dissipating equipment, maintains the characteristics of high speed, small inertia and quick response of the aero motor, and solves the problem by applying a controllable power source The problem of quick load of torque when starting. Under the Matlab simulation platform, the system model is established and a DC motor is simulated. It proves that the proposed scheme can be loaded quickly and practically.