主电动机调频控制。
采用机床主电动机功率法和声发射（AE）法来获取切削过程中发出的刀具磨损和破损信号，建立了刀具状态试验系统。
Experiments were implemented to obtain the motor power and AE signals under different cutting parameter condition(cutting velocity, feed velocity and cutting depth), tool wear and breakage conditions.
镗床主传动系统是用来实现镗床主运动的，它将主电动机的原动力变成可供主轴上刀具切削加工的切削力矩和切削速度。
The system of boring main driving is used to achieve the main movement boring machine, main Motor will become the driving force on the tool spindle machining cutting torque and the cutting speed.
《洛杉矶时报》博主susanCarpenter写道，将如此大的马力塞入这么小的引擎的关键在于组合型小型电动机控制器和高能量密度的锂离子电池。
Los Angeles Times blogger Susan Carpenter writes that the key to packing in so much power as being a combination of small motor controller and energy-dense lithium-ion battery cells.
用交流同步主发电机作为柴油机的起动电动机实现柴油机起动是一种切实可行的交流起动方案。
Using an ac synchronous main generator as the start motor of diesel engine to realize the start of diesel engine is a practical ac start scheme.
AC600中的主泵电机应为高转动惯量、高可靠性、高效率和起动性能良好的屏蔽电动机。
The reactor coolant pump canned motor of AC600 PWR is the kind of shielded motors with high moment of inertia, high reliability, high efficiency and nice starting performance.
分析主排水泵电动机烧毁原因，并提出改进措施。
This paper analyses the reasons about motor of chief pump burns out, and puts forward the improving methods.
温度继电器检测电动机温度，超过额定温度发出信号，接触器切断主电路，完成电机保护。
Temperature relay tests temperature of motor, if it exceeds rating temperature to send a signal, contactor cut off main circuit to complete protection of motor.
对主传动系统，我选用FANUCAC电动机通过带传动驱动主轴。
The main drive system, I choose FANUC AC motor drive through the belt drive spindle.
在无补偿直流牵引电动机中，通常采用主极极弧为圆弧的扩张气隙来改善换向器电位特性。
The opening air-gaps with circular main pole arc are usually used to improve the potential curve of commutator on non-compensable d. c. traction motors.
地铁主传动系统由牵引逆变器、微机控制驱动装置、牵引电动机等部件组成。
The devices of the main driver system in subway mainly consist of traction inverter, driver equipment with micro-computer control and traction motor.
本文研究了三相感应电动机软起动器，主电路由三组反并联的晶闸管构成。通过控制晶闸管的触发角，可降低三相感应电动机定子电压，从而达到抑制起动电流冲击的目的。
The principle of the soft starter is reducing the voltage applied to the stator of the induction motor by control the triggering angle of the thyristors in order to limit the starting current surge.
本文研究了三相感应电动机软起动器，主电路由三组反并联的晶闸管构成。通过控制晶闸管的触发角，可降低三相感应电动机定子电压，从而达到抑制起动电流冲击的目的。
The principle of the soft starter is reducing the voltage applied to the stator of the induction motor by control the triggering angle of the thyristors in order to limit the starting current surge.
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