Based on the theory of commutation in DC machines, this paper describes a numerical analysis method for analysis of the commutation spark.
本文根据直流电机换向理论，给出了一种分析直流电机换向火花的方法。
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.
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 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.
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 DC members are constrained to run on only the machines in the assigned Node Group.
DC成员仅限制于运行在所指派节点组中的机器上。
The machines used are typically single-phase pulsating DC, the oldest and simplest sort.
使用的机器通常是单相脉动直流，最古老，最简单的排序。
Along with incredible views, rooms at DUKES Dubai are equipped with high-tech amenities such as complimentary WiFi, coffee/tea machines, and universal AC/DC adapters.
随着令人难以置信的美景，在迪拜公爵的房间配备高科技的设施，如免费无线上网，咖啡/茶机和通用交流/直流适配器。
And the operation of various gas-shielded welding, ac and DC arc welding machine, stud welding machine, air plasma cutting machines and other ancillary products.
且经营各种气体保护焊机、交直流氩弧焊机、螺柱焊机、空气等离子切割机等配套产品。
According to the kind of driving machines, the speed-varying methods of air-conditioner fans can be classified into two kinds: DC speed-varying and ac speed-varying.
根据驱动电机的不同，可以把空调风机调速方法分为直流调速和交流调速两种。
According to the kind of driving machines, the speed-varying methods of air-conditioner fans can be classified into two kinds: DC speed-varying and ac speed-varying.
根据驱动电机的不同，可以把空调风机调速方法分为直流调速和交流调速两种。
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