查询词典 motor-driven

Based on the working condition of the tractor, a new type of electric tractor drive system which combines a motor and a gear, and the evaluation index and the calculation method for dynamic performance of electric tractor are suggested; taking an electric tractor drive system as design object, the balance graph of drive-resistance force, climbable gradient under different shifts, and continuous working time are calculation analyzed.

根据电动拖拉机作业特点，提出了一种电动机和变速箱相结合的电动拖拉机传动系统结构方案，并给出了电动拖拉机动力性能和经济性能评价指标以及电驱动系统主要参数的设计计算方法，以基于串励直流电动机的某型号小四轮电动拖拉机电驱动系统为设计实例，计算分析了该电动拖拉机的驱动力-行驶阻力平衡图、不同挡位下的爬坡度以及连续作业时间。

Researches show that the drive force characteristics of the electric tractor drive system based on series DC motor is close the ideal characteristics, the curves are concave, low speed with constant power, and high speed with constant torque; the electric tractor has large working speed under different shifts, but the extensive coincidence speed shows that the variable ratio of the gear is unreasonable; the maximum climbable gradient of this electric tractor is more than 30%, and does not need frequent shift when working for its extensive climbable gradient; there are many influence factors of continuous working time, which the more obvious factors are working speed and working load, the working time increases with the increase of the working speed and working load.2. Simulation researches on the drive characteristic of the electric tractor.

研究结果表明：基于串励直流电动机(来源：ABC21论文网www.abclunwen.com)的电动拖拉机电驱动系统的驱动力特性场接近理想驱动力特性场，其各挡下的驱动力特性是一组下凹的曲线，低速恒转矩，高速恒功率；同一行驶速度下所对应高挡驱动力大于低挡驱动力，这是由电机的调速特性决定的；电动拖拉机各个挡位下具有较广的稳定作业速度范围，但是各个挡位之间速度重合的范围较多，说明所用变速箱变速比与电动机匹配不合理；电动拖拉机最大爬坡度达到30%以上，并且各挡爬坡度变化范围较广，作业过程中不需要频繁换挡；影响电动拖拉机连续作业时间的因素较多，其中作业行驶速度和作业负荷影响最为明显，作业负荷越大，连续作业时间就越短，作业速度越快，连续作业时间就越短。2、电动拖拉机驱动特性仿真研究。

According to the demand of controlling speed, the system give out corresponding clock pulse to control the speed of the motor through the clock pulse.

控制系统按速度控制的要求从时钟脉冲控制线发出相应的控制脉冲即可对步进电机的转速进行控制。

This paper presents a stepper motor drive control system design, including its clock pulse circuit, pulse distributor, and the drive circuit and power supply design.

摘 要：本文介绍了一种步进电机驱动控制系统设计方案，包括其时钟脉冲电路、脉冲分配器、以及驱动电路和供电电源的设计。

The direction of rotation is clockwise, when looking from the motor towards the pump.

从泵的驱动端看，泵的旋转方向为顺时针。更多SIHI液环真空泵。。。

Neurologic examination revealed motor strength deficiency in all her extremities, with extensor reflexes, clonus, and bilateral hyper-reflexiveness.

MRI发现C1-C3水平脊髓存在难以确定的增强扫描同质且呈分叶状的偏心性包块。

"The dry-pit submersible motor enclosure including frame, end brackets, flanges and cap assembly shall be constructed of close-grained cast iron, aSTM a-48, Class 30 or better."

干井潜水电机壳体，包括机架，尾轴承架，法兰和罩盖总装，必须采用符合美国材料试验协会aSTM a-48类别30标准的、密实的铸铁或更好的材料制造。

The submersible motor enclosure including frame, end brackets, flanges and cap assembly shall be constructed of close-grained cast iron, ASTM A-48, Class 30 or better.

潜水电机壳体，包括机架，尾轴承架，法兰和罩盖总装，必须采用符合美国材料试验协会ASTM A-48类别30标准的、密实的铸铁或更好的材料制造。

Close-up view of the sled with the motor in position.

密切跟进鉴于该雪橇与汽车的位置。

This camera was located approximately 60 feet away, with the zoom feature used to obtain a close-up view of the motor during firing.

这相机是位于大约60英尺远的，与缩放功能用来获取密切跟进，鉴于汽车在射击。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。