A power amplification of H-bridge bipolar PWM control is designed for controlling DC micro-motor of positive rotation, reverse rotation and speed regulation.
基于H型双极模式P WM控制原理，设计了一种直流微电机正反转调速功率放大电路。
The amount of angular momentum, say, a spinning skater has depends on both the speed of rotation, and the weight and distribution of mass around the center.
角动量的大小，取决于旋转中的滑冰选手的旋转速度、体重和绕旋转中心的质量分布。
And keep that with you, because it's going to be important in what follows we can derive three things: the radius, the period of rotation and the speed of the object as I twirl it around.
从这条曲线，记住这条曲线，So, from, that, curve—，因为接下来它会，很重要，从中你们推导出3样：，半径，自转周期，已经我旋转的，物体的速度。
And the answer is for the day to get shorter, Earth's rotation has to speed up.
那么关于地球上的一天为什么变短的答案是，地球的自转加速了。
These cars will then travel alongside to match the speed of the wheel at the bottom of its rotation so passengers can transfer in and out of the cars.
这些车辆届时将在摩天轮旋转到底端的时候在旁边与其同速行驶，以便乘客可以进入或者走出这些车辆。
Rationally define the work gear pump speed, gear and the axis of rotation to avoid engaging resonance frequency, can prevent noise intensified.
合理确定齿轮泵的工作转速，使齿轮与轴的转动避开啮合共振频率，可以防止噪声加剧。
Some may show your car's speed as well (on the navigation map), although it's synced to the car speedometer, which typically runs off tire rotation and is subject to inaccuracies.
虽然它同步到汽车里程表，通常逃跑轮胎旋转，是不准确，有些可能会显示以及(在导航地图上)，你的车的速度。
The gear wheel is used to complete the rotation speed of the upper and lower rollers, but the rotation direction is opposite.
采用扇形不完全齿轮传动送料轮轴上的齿轮来完成，上、下滚轮的转速相同，但旋转方向相反。
The relationship between temperature of Northeast China in summer and the earth rotation speed is studied.
该文研究了东北地区夏季温度与地球自转速度变化的关系。
Speed and rotation direction of two stepper motor are controlled through procedures designed, and accuracy of the procedures control is detected by the waveform measurements.
通过程序设计对两台步进电机的转速和旋转方向进行控制，并且通过实际测量的波形信号检测了程序的控制精度；
The theory and method of the rotor position detection and rotation speed based on absolute photoelectric encoder are introduced.
介绍了基于绝对式光电码盘的转子位置检测与转速测量的原理和方法。
This paper introduces the structure and principle of the pressure regulating overflow valve and rotation speed regulation valve used in a new type of cleaner.
介绍了新研制的一种新型清洗机所采用的调压溢流阀和转速调节阀结构及其原理。
That are the amplitude changes of rotation speed frequency, and initial phase angle.
并分析了影响其抑振效果的三个因素：转速变化幅值，频率以及初相角。
The influences of plunge depth, push angle, profile of tool, rotation speed and welding speed on metal flowing were studied.
从压入量、倾角、搅拌工具的外形、焊接速度、旋转速度和材料所处位置等方面研究了工艺参数对金属塑性流动的影响。
When I stroked first with the other arm, I added the power of core-body rotation to that first stroke – increasing the distance and speed of my breakout to the surface.
但当我用另外一侧胳膊的划臂作为起始的话，在第一次划臂时我会把力量用在身体轴心的旋转上---这样增加了划臂的距离和速度。
Providers rotation torque to 17,500 ft-lbs (23,727 Nm) with variable rotation speed to 180 RPM for exceptional horizontal and direction drilling performance.
最高转矩17，500 英尺·磅（23，727牛顿·米），可变转速最高180转/分，带来无与伦比的水平钻井与定向钻井性能。
The performance of high speed rolling bearing was studied under unstable conditions of rotation speed fluctuation, and the failure modes of the bearing were analyzed under such conditions.
分析了高速滚动轴承在转速波动这一非平稳状态下的运行状态，研究了转速波动对轴承运转性能和失效模式的影响。
Angular contact ball bearings for high-speed and high precision rotation.
角接触球轴承适用于高速及高精度旋转。
Tell me the oil temperature, oil pressure and rotation speed at present?
现在的油温、油压、转速是多少？
The spiral horn of sheave and rotation speed had influence on sowing performance.
说明了槽轮的螺旋角度和转速对排种性能的影响。
Through experiment, it have realized digital and curve display of motor rotation speed, application program and experiment result has been given.
经过实验，实现了电机转速的数字和曲线显示，给出了应用程序和实验结果。
Engine tests of starting procedure control and rotation speed in closed loop have proven that the time precision and reliability of this software meet the demands of engine control system well.
在发动机台架上对微型涡喷发动机进行的起动过程控制和转速闭环调节试验表明，该控制软件在时间精度和可靠性方面能够满足发动机控制的要求。
In this model, power distribution in stator winding and rotor winding is calculated according to both wind-power curve and rotation speed control law of VSCF wind turbine.
应用该模型，可以根据风电机组风功率特性曲线和转速特性曲线，计算风电机组定子侧和转子侧的功率分布。
In the model, a new method of calculating fuel consumption, one of difficult problems in this area, is proposed combined with grate structure and rotation speed of grate motor.
在建立效率测算模型的过程中，结合炉排结构参数和炉排电机转速给出了一个计算燃料消耗量的方法，解决了燃料消耗量难以测量的问题。
The closed loop control strategy by model tracking2-freedom rotation speed and the sight-based velocity estimation method are introduced.
提出了模型跟踪2自由度转速闭环控制策略和基于观测器的车速估算方法。
The variation principles of the throw distance, flow rate and rotation speed of variable-rate sprinklers for precision irrigation on square area were given.
通过理论分析，给出方形喷洒域变量施水精确灌溉喷头的射程、流量和转速应服从的变化规律和计算公式。
Introduces a measurement method of instantaneous speed of rotation and dynamic process of speed of electric machine by means of single chip microcomputer and photoelectric transducer.
介绍了一种利用单片机和光电转速传感器来测量电机瞬态转速及电机转速变化过程的方法。
The main purpose is to illustrate the solution and technology advantages of DC brushless controller, in account of rotational speed control and phasing rotation control function.
旨在说明直流无刷电机控制器对电动机转速控制以及换相控制的实现方法和技术优势。
The main purpose is to illustrate the solution and technology advantages of DC brushless controller, in account of rotational speed control and phasing rotation control function.
旨在说明直流无刷电机控制器对电动机转速控制以及换相控制的实现方法和技术优势。
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