增压后天然气发动机的最大功率与原汽油机相当，低速转矩特性明显改善，同时发动机使用经济性也得到提高。
The maximum power of the supercharged CNG engine is equivalent to that of the original gasoline engine, with certain improvement in low speed torque and fuel economy.
我们采用具有矢量控制功能的LG变频器，可使电机在低速时也能提供满足负载需要的转矩。
We adopt vector control function with LG inverter, can make the motor in the low speed can also provide meet the need of the load torque.
调速比为1：50 00，从低速到高速都具有稳定的转矩特性。
Speed ratio is 1:5000, from low speed to high speed, all have steady torque characteristics.
针对基于直接转矩控制的感应电动机在低速运转时存在较大的转矩脉动问题，该文提出一种新的控制方法。
Due to the large torque ripple of inductance motor based on direct torque control, especially at a low speed, this paper proposes a new control strategy.
针对基于直接转矩控制的感应电动机在低速运转时存在较大的转矩脉动问题，提出一种新的控制方法。
Due to the large torque ripple of inductance motor based on direct torque control, especially in a low speed, this paper proposes a new control strategy.
认为以满足螺旋桨额定推力为目的，推进电动机只需要低速输出额定转矩来实现，即输出功率较低。
In order to satisfy the operation requirement of the rated thrust of the propeller, the propulsion motor performs only in rated torque on the low speed, so the motor power is low.
文中设计了一种模糊在线检测器以检测电阻的瞬时值，为改善直接转矩伺服系统的低速性能找到了一种有效的方法。
This paper designs a fuzzy observer for measuring resistance value of induction motor and presents an effective method for improving the performance of the DTC servo system at low speeds.
今后研究的问题仍然集中在包含零速时稳定低速驱动的实现和伴随转矩控制的稳定起动上。
The research issues in future still be focused on implement of stable low speed drive involving zero-speed and stable start-up with torque control.
如何提高定子电阻的观测精度是改善无速度传感器直接转矩控制系统低速特性的关键。
How to enhance resistance detector precision is the key to improve the low-speed performance of DTC system.
介绍了一种采用静压支承的曲轴连杆式低速大转矩液压马达滑靴副的高压化设计方法。
A high pressurized design method of slipper pairs of a new type camshaft connecting-rod low speed high torque motor was put forward.
针对基于直接转矩控制中的感应电动机在低速运转时存在较大的转矩脉动问题，提出了一种新的控制方法。
For the large torque ripple of inductance motor based on direct torque control, especially at a low speed, this paper proposes a new control strategy.
传统的直接转矩控制存在着转矩脉动大，低速性能差、开关频率不固定等问题。
The traditional direct torque control system has existed large torque fluctuation, poor performance of low speed region, inconstant switch frequency, etc.
并针对低速大转矩永磁同步电动机的特点采用基于ANSYS软件的分析方法，计算了不同转子位置时电机的输出转矩。
According to the feature of low-speed and high-torque permanent magnetic synchronous machine, the output torques are also calculated in different positions based on the ANSYS software.
电动汽车直接转矩模糊控制系统中，定子磁链观测器采用电压模型时，系统低速性能变差。
In a direct torque fuzzy control system of electric vehicle, when the voltage model is used as stator flux observer, the system's low speed performance becomes poor.
仿真结果表明，本文提出的方法很大程度上降低了开关磁阻电机的转矩脉动，低速时的控制效果较高速时更为明显。
The simulation results show that this method can reduce the torque ripple of SRM largely, and the control effect of lower speed is more obvious than higher speed situation.
实验结果表明，IS C控制策略能够有效地改善直接转矩控制系统的低速特性。
The experiment results show that control performance has been improved by means of ISC in low-speed operation.
仿真结果表明了模糊神经网络观测器可实现对定子电阻的精确检测，从而提高直接转矩控制系统的低速性能。
Simulation results show that this fuzzy-neural network estimator can precisely measure the value of resistance and improve the low-speed performances of DTC system efficiently.
结果表明提出的控制器可以保持开关频率恒定，并降低了转矩脉动，尤其在低速时。
The results indicate that the proposed controller is capable of maintaining the torque switching frequency constant and reducing the torque ripple, particularly at low speed.
仿真结果表明，采用低通滤波器补偿法， 直接转矩控制系统的低速性能有十分明显的提高，证实了该方法的有效性。
The simulation results showed that the performances have been improved by the compensation method based on low-pass filter in low speed in DTC system, confirming the validity of the method.
针对异步电动机直接转矩控制系统低速性能差的问题，提出了两项改进措施。
Direct Torque control (DTC) is a AC speed regulation method with high dynamic performance developed after vector control.
在直接转矩控制系统中，异步电动机定子电阻为一变化值，从而影响了控制系统的低速性能。
The stator resistance of asynchronism electromotor in direct torque control system, is a variable value which influence the low speed performance of the system.
直接转矩控制系统在低速运行时，电机定子电阻的变化影响了系统的性能。
The change of the stator resistance of induction motor will greatly effect the performances of direct torque control (DTC) system at low speeds.
这些电机的设计，以适应范围广泛的应用，包括直接驱动伺服系统中，记录器的驱动器，保持转矩和高转矩低速控制系统。
These motors are designed to accommodate a wide range of applications including direct drive servo systems, recorder drives, holding torque and high torque-low speed control systems.
今后研究的问题仍然集中在包含零速时稳定低速驱动的实现和伴随转矩控制的稳定起动上。
The research issues in future still be focused on implement of stable low speed drive involving zero-speed...
本文结合低速大转矩的传动特点，对低速大转矩永磁同步电动机的设计特点和方法进行研究。
The paper discusses the characteristic and design method of low speed and high torque PMSM considering driving requirement of the oil extraction system.
他们的特点是在低速恒转矩和恒功率速度超过了范围广泛（1：10），驱动实现DIGIVEX。
They are characterised by constant torque at low speed, and constant power over a wide range of speeds (1:10), achieved by DIGIVEX Drive.
他们的特点是在低速恒转矩和恒功率速度超过了范围广泛（1：10），驱动实现DIGIVEX。
They are characterised by constant torque at low speed, and constant power over a wide range of speeds (1:10), achieved by DIGIVEX Drive.
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