增加启动转矩最终角度。
文中利用本法计算了同步电动机的异步启动转矩特性。
This method has been used to calculate the speed-torque characteristics of a synchronous motor during asynchronous starting.
文中还讨论了其启动转矩的确定，定、转子驱动电源的计算等问题。
Finally, the problem to determine the maximum starting torque and to calculate the exciting source of the stator and rotor of the machine are discussed.
该方法具有启动电流小、启动转矩大、启动平滑、运行稳定、控制效果好的特点。
It has many advantages such as small starting current, heavy starting torque, stable starting running and good control effect.
从步进电机的矩-频特性可知，启动频率越高，启动转矩越小，带动负载的能力越差。
According to torque vs. speed characteristic of stepping motor, the higher startup speed is, the smaller startup torque is and then the worse the capability of driving load is.
适当增加铁心长度可以有效提高电机效率和功率因数，但会导致启动转矩倍数和最大转矩倍数减小。
Increasing core length properly can raise motor efficiency and power factor, but it will reduce locked-rotor torque ratio and breakdown torque ratio.
本文通过分析T形等效电路，建立了电机启动转矩随频率变化的函数方程，建立了电机启动电流随频率变化的函数方程；
This paper analyzes T-shape equivalent circuit, establishes starting torque function equation with the variation of requency and starting current function equation with the variation of requency.
只要踩下踏板就能启动汽油引擎，而行驶中另外需要增加的转矩将由电力引擎来辅助提供。
Stomp the pedal and the gasoline engine takes over, with an assist from the electric motor to provide additional torque.
通过启动特性分析，提出了提高电机启动时异步转矩的办法。
The ways to improve asynchronous torque during motor starting process are given by analysis the start characteristic.
通过自主开发的以数字信号处理器为核心的实验平台进行了功能验证，实现了永磁同步电机无机械冲击和最大转矩启动。
Verify the functions through the test platform developed by our team, which takes the DSP processor as the core to realize PMSM start-up at maximum torque and without mechanical impact.
所收录的方法涵盖异步电机调速的各种方式，包括VVVF、直接或间接矢量控制、直接转矩控制，甚至软启动。
The methods discussed cover all speed control schemes, including VVVF, direct or indirect vector control, direct torque control and soft start.
文中详细论述了提升机双馈串调系统的转矩特性和提升机切电阻时启动力矩设计计算。
Discuss in detail the torque characteristics of hoister double-fed cascade adjusting speed system and the designing calculation of starting torque of hoister shearing resistor.
得出了负载转矩与电流过载倍数、负载转矩与启动时间、负载转矩与断相电流的关系曲线。
The relations between load torque and overload current, load torque and staring time, load torque and current of phase failure are given.
软启动器可以限制感应电机的起动电流及起动转矩，减少了电机起动过程中对电网的冲击，延长了电气设备和机械结构的使用寿命。
Soft-starter can limit the start current and torque of the induction-motor, reduce the influence to the power circuit in the starting process, and prolong electrical equipments' working life.
分析了转子断条故障特征在电机启动电磁转矩信号中的表现形式及频率变化规律。
The expression and frequency variety law of the rotor broken bar fault feature component in the startup electromagnetic torque signal are analyzed in detail.
低电压软启动器以体积小，转矩可以调节、起动平滑、冲击小并具有软停机功能等优点得到了越来越多的应用。
The low-voltage soft starter has been applied increasingly due to its advantages such as small size, adjustable torque, smooth starting, low impact and soft-stop function.
提出了一种基于位置模糊控制策略的启动方法，有效解决了传统直流转矩定位方法的转子退磁问题。
Proposed a vague location control method to launch the rotor, which is an effective solution to the problem of weakening magnetic field caused by traditional DC torque methods.
开门时转矩超过该值，则门机开始推进，启动重新自学习。
When the door open and the torque exceeds the value, the door motor begun to re-start learning.
在分析火电厂燃料重调机运行特性的基础上，采用变频控制技术对传统的运行方式进行改造，解决了高惯量、大转矩负载启动，多台电机同步驱动运行等问题。
The fuel-camion redeployer in the coal-fired power plant has the characteristics of the high-inertia, the large-torque load startup, the multi-motor synchronic drive running etc.
理论分析和实验表明：提出的方法与霍尔传感器一样能保证无刷直流电机快速大转矩、小抖动、无堵转的平滑启动。
Theoretical analysis and experimental results show that the method has the effect as same as Hall sensor in the event that ensure the DC motor start-up quickly and microseism, and no locked rotor.
针对这一问题，利用转矩实用修正表达式绘制了启动特性曲线。
For this case, with torque practical correction expression, the startup characteristic curve basically conforms to the curve obtained from the experiments.
针对这一问题，利用转矩实用修正表达式绘制了启动特性曲线。
For this case, with torque practical correction expression, the startup characteristic curve basically conforms to the curve obtained from the experiments.
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