变频器和单片机的基本知识英汉翻译.doc

Basic Knowledge of Inverters and Single-chip

Frequency AC motor speed control used as the principal means have been used

in a wide range of applications in the industrial area .It has a wide range of speed,

steady speed and high precision, fast dynamic response for a wide range of technical

performance and reliable operation has been gradually replace the DC motor speed

control system. There are three main control types of inverter: first,through the

operator panel inverter, that is, through the operation panel to change the output

frequency and other operating parameters.Second, in the frequency converter analog

input 0 ~ 10V or 4 ~ 20mA signal.Control the output frequency by changing the size

commonly used in large and medium-sized control systems. For some small

experimental device and embedded control device, besides controlling the frequency

converter, the processor generally also need to deal with keyboard input, display, data

acquisition and other work such as process control.Such control is more suitable for

single-chip control system as the core.When it comes to the PLC in the form of

additional operating panel. It can achieve the function but the cost is too high,So it

should not be used.

Using single-chip control inverter can choose the last two kinds of methods.The

advantage of the use of communication control full control function. By the

appropriate level-shifting inverter circuit suitable for the form of communication ,then

choice varieties of frequency converter,and the applicability is limited. As for the

analog input control, then almost all of the inverter can support.Although in more

single function,it can achieve the main functions of the varies speed.And it can meet

the use requirements of the majority of occasions,so it is universal.