The suction is provided by three by - pass motors , using carbon brushes , operated by independent switches and placed inside a sturdy steel casing 吸尘系统是三个单相旁路电动马达，使用碳刷，在钢制外壳上有独立的操作开关。
The exciter system of traditional dc exciter has some weaknesses , whose commutators and carbon brushes often need examining , repairing and maintaining timely 对传统直流励磁机的励磁系统而言，其带有滑动接触部分的换向器和炭刷等薄弱环节，需要定时检修与维护。
A separated collecting ring with carbon brushes was designed and manufactured for the dynamic stress test of spoke plates of rotor of bulb tubular turbine generator 摘要根据测试需要，设计自制了分体式碳刷集流环，对灯泡贯流式水轮发电机转子辐板进行了动应力测试。
Because of canceling slip rings and carbon brushes , it is impossible to measure directly the rotating rectifier ' s current and voltage . so , it is very difficult to monitor and protect the rotating rectifier 但是，取消了滑环和炭刷，旋转整流器的电压和电流不可能直接测量，使其监视与保护十分困难。
Djw - wb , sjw - wb series of series of single - phase three - phase micro - computer superpower avr , it gathers advaned combinated roll compensation , no - touch of wsitch , and micro - motor controlhaving special function such as high efficiency , energysaving , quick adjustment , auto - balance of three phase , no machanical breakdown and carbon brush fret . especially , the avantages of timedelay , over - voltage and under - voltage protection absorbs more and more customers Wb系列单、三相微电脑无触点大功率电力稳压器是集先进的组合绕组补偿方式和无触点开关、微机控制交流稳压技术于一体，具有高效工能、调节快速、三相自动平衡、无机械故障和碳刷磨损，并具有延时，过压欠压报警和保护功能。
The products come in a great varieties as follows : medium and high carbon graphite , high purity to extra fine micro powder graphite and etc . the graphite powder developed by our company special for powder metallurgy and graphite powder special for carbon brushes have been well received by a great many customers 公司开发的粉末冶金专用石墨粉碳刷专用石墨粉摩擦材料用石墨粉等，受到国内外广大用户的一致好评。公司有较强的科研能力，能根据不同用户的要求，开发新产品。
Djw - wb 、 sjw - wb series single and three phase & large - power auto compensated voltage regulator , incorporating advanced technology of group winding compensation and mon - contact suitch and micro - computer controling ac regulation , with functions of high effeciancy quick regulating ou - to - balance of three phases no mechanical no mechanical broken down and wear of carbon brush and time delay over and low load warning and protection 集先进的组合绕组补偿方式和无触点开关、微机控制交流稳压技术于一体，具有高效节能、调节快速、三相自动平衡、无机械故障和碳刷磨损，并具有延时，过、欠压报警和保护等功能。
Sparking on commutator ' s carbon brushes is a common phenomenon in operation of the turbo - generator set , the causes resulting in sparking have been analysed , the experiences in aspects of operation , maintenance , and repair being summarized , and corresponding preventive measures beng put forward 摘要励磁机换向器碳刷冒火花是汽轮发电机组运行中常见的现象，分析了产生火花的原因，总结了励磁机换向器运行、维护、检修以及故障处理等方面的经验，提出相应的预防措施。
