MC07B0022-5A3-4-S0  变频器   提供其所需要的电源电压

MC07B0022-5A3-4-S0 变频器（Variable-frequency Drive，VFD）是一种应用变频技术与微电子技术的电力控制设备，通过改变电机工作电源频率的方式来控制交流电动机。它主要由整流（交流变直流）、滤波、逆变（直流变交流）、制动单元、驱动单元、检测单元微处理单元等组成。变频器通过内部IGBT的开断来调整输出电源的电压和频率，根据电机的实际需要来提供其所需要的电源电压，从而达到节能、调速的目的。此外，变频器还具有过流、过压、过载等多种保护功能。随着工业自动化程度的不断提高，变频器得到了非常广泛的应用。

MC07B0022-5A3-4-S0 变频器的工作原理是利用电力半导体器件的通断作用将工频电源变换为另一频率的电能控制装置。变频器通常采用交—直—交方式（VVVF变频或矢量控制变频），先把工频交流电源通过整流器转换成直流电源，然后再把直流电源转换成频率、电压均可控制的交流电源以供给电动机。MC07B0022-5A3-4-S0 变频器的电路一般由整流、中间直流环节、逆变和控制4个部分组成。整流部分为三相桥式不可控整流器，逆变部分为IGBT三相桥式逆变器，且输出为PWM波形，中间直流环节为滤波、直流储能和缓冲无功功率。在变频技术以前，电机用的是直流电调速，但直流电机有电刷，维护复杂且还有电火花（危险场合不能用），基本淘汰。相对来说直流调速，速度更稳定，所以还有使用。变频电机的工作原理与三相交流异步电动机工作原理一样，变频电机是通过改变输入三相交流电的频率改变电机的转速。

MC07B0022-5A3-4-S0  变频器   提供其所需要的电源电压

MC07B0022-5A3-4-S0 Variable frequency Drive (VFD) is a power control device that applies frequency conversion technology and microelectronics technology to control AC motors by changing the working power supply frequency of the motor. It is mainly composed of rectifier (AC to DC), filter, inverter (DC to AC), brake unit, drive unit, detection unit and micro-processing unit. The inverter adjusts the voltage and frequency of the output power supply by breaking the internal IGBT, and provides the required power supply voltage according to the actual needs of the motor, so as to achieve the purpose of energy saving and speed regulation. In addition, the inverter also has over current, over voltage, overload and other protection functions. With the continuous improvement of industrial automation, the frequency converter has been widely used.

The working principle of MC07B0022-5A3-4-S0 inverter is to convert the power frequency power supply into another frequency power control device by using the on-off action of power semiconductor devices. The inverter usually adopts AC-DC-AC mode (VVVF frequency conversion or vector control frequency conversion), which first converts the power frequency AC power supply into DC power supply through the rectifier, and then converts the DC power supply into the frequency and voltage can be controlled AC power supply to supply the motor. The circuit of MC07B0022-5A3-4-S0 inverter is generally composed of four parts: rectification, intermediate DC link, inverter and control. The rectifier part is a three-phase bridge uncontrollable rectifier, the inverter part is an IGBT three-phase bridge inverter, and the output is PWM waveform, and the intermediate DC link is filtering, DC energy storage and buffer reactive power. Before the frequency conversion technology, the motor used direct current speed regulation, but the DC motor has a brush, complex maintenance and electric spark (can not be used in dangerous occasions), and is basically eliminated. Relatively speaking, DC speed regulation, the speed is more stable, so it is still used. The working principle of the variable frequency motor is the same as that of the three-phase AC asynchronous motor, the variable frequency motor changes the speed of the motor by changing the frequency of the input three-phase AC.