Word

Meaning

中文

DC Motor

A DC motor is a mechanically commutated electric motor powered from direct current (DC). The stator is stationary in space by definition and therefore the current in the rotor is switched by the commutator to also be stationary in space.

直流电机

Fleming’s left hand rule

弗莱明左手定则

Flux density

磁感应强度

torque

a twisting force that causes machinery

转矩，[力] 扭矩

momentum

the quantity of movement of a moving object, measured as its mass multiplied by its speed 

[物] 动量；动力；冲力

commutator

a device for changing the direction in which electricity flow

[电] 换向器；整流器

permanent-magnet

a magnet, often of steel, that retains its magnetization after the magnetic field producing it has been removed

永磁；永久磁铁

Permanent Magnet DC Motor

永磁直流电动机

Back EMF

an electromagnetic force appearing in an inductive circuit in such a direction as to oppose any change of current in the circuit

反电动势

Faraday’s Law of Electromagnetic Induction

法拉第电磁感应定律

Lenz’s law

楞次定律

Speed regulation

速度调节；速度调整（调速）

RPM

Revolutions Per Minute(a measurement of the speed of an engine or a record when it is playing)

每分钟转数

shunt-connected DC motor

并联直流电机

Friction

the resistance (= the force that stops sth moving) of one surface to another surface or substance moving over or through it

摩擦，[力] 摩擦力

bearing

 a part of a machine that supports a moving part, especially one that is turning

轴承

Windage

air friction

气隙

Hysteresis

/,hɪstə'riːsɪs/ 

the lagging of an effect behind its cause; especially the phenomenon in which the magnetic induction of a ferromagnetic material lags behind the changing magnetic field

磁滞现象

Eddy Current losses

涡流损耗

Copper losses

铜损

Rotation Reversal

反转

Transistor

a semiconductor device capable of amplification

晶体管

microcontroller

单片机；微控制器

PLC

Programmable Logic Controller

 可编程逻辑控制器

relay

electrical device such that current flowing through it in one circuit can switch on and off a current in a second circuit

继电器

energise

vt. 供给…能量；使精力充沛（等于energize）

FWD

forword

正转

REV

reverse

反转

clockwise

顺时针

Anti-clockwise

逆时针

Pulse Width Modulation（PWM）

PWM uses a high frequency (>1kHz) signal that alternates between on and off.

脉冲调制

carrier wave

a wave of fixed amplitude and frequency that is modulated in amplitude, frequency, or phase in order to carry a signal in radio transmission

[通信] 载波

duty cycle

A duty cycle is the percent of time that an entity spends in an active state as a fraction of the total time under consideration

工作周期；占空比