Protections: Over Current, Phase Loss, Locked Rotor.
保护功能：过电流，缺相，堵转。
The system can load test, efficiency test, temperature test, locked rotor test.
该系统可以进行加载试验、效率试验、温升试验、堵转试验。
In the computerized automatic test system of small asynchronous motor, the research on method of rapid measuring locked rotor performance is always an emphasis.
在大批量小功率异步电机微机自动测试系统中，快速测量电机堵转性能的方法一直是研究的重点。
It also includes, Hall element inputs, a sequencer for commutation control, fixed off time pulse width modulation (PWM) current control and locked rotor protection.
它还包括霍尔元件输入、整流控制定序器、固定停机时间脉冲宽度调制(PWM)电流控制以及锁定转子保护。
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.
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。
Motor and inverter can be protected by the current cut-off negative feedback when motor is overload or locked-rotor.
当电机负载过载或堵转时，采用电流截止负反馈环节可保护电机和驱动器；
The output torque of motor are not exceed maximum locked torque rotor.
为了使电机工作稳定，电机的输出转矩不能超过最大堵转转矩。
Increasing core length properly can raise motor efficiency and power factor, but it will reduce locked-rotor torque ratio and breakdown torque ratio.
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。
During the process of running, if it appears locked-rotor, the starter will automatically run for the reduction of motor speed to reach the goal of increasing the torque and reducing current of motor.
电机运转过程中，如出现堵转现象，随着电机转速的降低，起动器会自动投入运行，达到增加电机转矩，减少起动电流的目的。
With very high locked-rotor torque and excellent performance in low frequency, it is suitable for situation with shock load to save power.
具有特高的起动转矩和良好的低频特性，特别适用于有冲击负荷的场合，在这种场合下使用比一般电机节电。
This article is the technical summarization that we developed over past two years phase-locked velocity servo loop for three-phase asynchronous motor that drives gas-dynamic free-rotor gyroscope.
本文是两年来研制动压气浮陀螺驱动马达锁相式速度控制系统的技术总结。
This article is the technical summarization that we developed over past two years phase-locked velocity servo loop for three-phase asynchronous motor that drives gas-dynamic free-rotor gyroscope.
本文是两年来研制动压气浮陀螺驱动马达锁相式速度控制系统的技术总结。
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