直流电机的突出优点是通过选择磁场绕组不同的励磁方法，可以获得变化范围很大的运行特性。
The outstanding advantages of DC machines arise from the wide variety of operating characteristics which can be obtained by selection of the method of excitation of the field windings.
励磁绕组和电枢电路有各种接法，因而有不同的性能，这是直流电动机的显著优点。
The field circuit and the armature circuit can be interconnected in various ways to provide a wide variety of performance characteristics - an outstanding advantage of DC machines.
上述原理表明，通过改变直流励磁电流，可以连续地控制HSY的气隙磁通和绕组感应电压。
The above principle suggests that the gap flux and the voltage induced in armature winding of HSY can be controlled adequately and continuously by varying dc field current.
利用该统一模型，分析了外加直流电压法、外加交流电压法、乒乓切换法中电刷接触电阻对励磁绕组接地电阻测量值的影响和危害。
By using power of DC superimposed AC, oxidation rate rose with increase of voltage but had nothing to do with frequencies in this experiment.
利用该统一模型，分析了外加直流电压法、外加交流电压法、乒乓切换法中电刷接触电阻对励磁绕组接地电阻测量值的影响和危害。
By using power of DC superimposed AC, oxidation rate rose with increase of voltage but had nothing to do with frequencies in this experiment.
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