空载特性是指发电机在额定转速下，负载电流为零时，发电机定子电压和转子电流的变化曲线。
给出了低速车用交流发电机的几何参数，空载特性和外特性的实测数据。
The geometric parameters and the testing data of the no load and the full load characteristics are also offered.
通过改变励磁电流的大小，得到了基波绕组和三次谐波绕组的空载特性曲线。
The first harmonic winding and harmonic winding no-load property curve are gained when field current is change.
本文介绍了单缸电力约束活塞发动机的结构及工作机理，并对其空载特性进行了理论和试验研究。
This paper introduced the construction and working principle of Single-cylinder Electric Power Confined Piston Engine, and studied the No-load characteristic on theory and experiment.
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