SEW 31C075-503-4-00 逆变器 原理是应用变频技术与微电子技术的原理，通过改变电机工作电源频率的方式来控制交流电动机的电力控制设备。使用的电源分为交流电源和直流电源，一般的直流电源大多是由交流电源通过变压器变压，整流滤波后得到的。交流电源在人们使用电源中占总使用电源的95%左右。无论是用于家庭还是用于工厂，单相交流电源和三相交流电源，其电压和频率均按各国的规定有一定的标准，如我国大陆规定，直接用户单相交流电压为220V，三相交流电线电压为380V，频率为50Hz，其它国家的电源电压和频率可能与我国的电压和频率不同，如有单相100V/60Hz，三相200V/60Hz等等，标准的电压和频率的交流供电电源叫工频交流电。
31C075-503-4-00
为了产生可变的电压和频率，该设备首先要把电源的交流电变换为直流电（DC），这个过程叫整流。 一般逆变器是把直流电源逆变为一定频率和一定电压的逆变电源。对于逆变电源频率和电压可调的逆变器我们称为变频器。 变频器输出的波形是模拟正弦波，SEW 31C075-503-4-00主要是用在三相异步电动机调速用，又叫变频调速器。 对于主要用在仪器仪表的检测设备中的波形要求较高的可变频率逆变器，要对波形进行整理，可以输出标准的正弦波，叫变频电源。
31C075-503-4-00
但用于荧光灯的变频器主要用于调节电源供电的频率。 变频器的工作原理被广泛应用于各个领域。SEW 31C075-503-4-00例如计算机电源的供电，在该项应用中，变频器用于抑制反向电压、频率的波动及电源的瞬间断电。 变频器主要采用交—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，然后再将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。
31C075-503-4-00
The principle of SEW 31C075-503-4-00 inverter is the application of frequency conversion technology and microelectronics technology to control the power control equipment of AC motors by changing the frequency of the motor’s working power supply. The power supply used is divided into AC power supply and DC power supply. Generally, DC power supply is mostly obtained by AC power supply through transformer transformation, rectification and filtering. AC power accounts for about 95% of the total power used by people. Whether used in households or factories, the voltage and frequency of single-phase AC power supplies and three-phase AC power supplies are subject to certain standards according to the regulations of various countries. For example, according to the regulations in mainland China, the single-phase AC voltage for direct users is 220V, the three-phase AC wire voltage is 380V, and the frequency is 50Hz. The voltage and frequency of power supplies in other countries may be different from those in China, such as single-phase 100V/60Hz, three-phase 200V/60Hz, etc, The standard voltage and frequency of AC power supply is called power frequency AC power supply
31C075-503-4-00
In order to generate variable voltage and frequency, the device first converts the alternating current of the power supply into direct current (DC), a process called rectification. Generally, an inverter converts a DC power source into an inverter power source with a certain frequency and voltage. For inverters with adjustable frequency and voltage, we refer to them as frequency converters. The waveform output by the frequency converter is an analog sine wave, and SEW 31C075-503-4-00 is mainly used for regulating the speed of three-phase asynchronous motors, also known as frequency converters. For variable frequency inverters with high waveform requirements mainly used in detection equipment of instruments and meters, the waveform should be organized to output standard sine waves, called variable frequency power supplies.
31C075-503-4-00
But the frequency converter used for fluorescent lamps is mainly used to adjust the frequency of the power supply. The working principle of frequency converters is widely applied in various fields. SEW 31C075-503-4-00, for example, in the power supply of computer power supply, in this application, the frequency converter is used to suppress fluctuations in reverse voltage, frequency, and instantaneous power outage. The frequency converter mainly adopts the AC-DC-AC mode (VVVF frequency conversion or vector control frequency conversion). Firstly, the power frequency AC power is converted into DC power through a rectifier, and then the DC power is converted into AC power that can be controlled by frequency and voltage to supply the motor.
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