20DC460NOENNBNBNE 整流器 省去电感采用简单的平波回路

☆型号：20DC460NOENNBNBNE  整流器  省去电感采用简单的平波回路

【产品详情】

品牌: AB

型号: A-B 20DC460NOENNBNBNE

订货号: A-B 20DC460NOENNBNBNE

产地类别：进口

控制方式：转差频率

外型：柜式

供电电压：低压

输出电压调节方式：其他

直流电源性质：电流型

美国AB变频器由三部分构成，将I频电源变换为直流功率的“整流器”，吸收在变流器和逆变器产生的电压脉动的"平波回路整流器大量使用的是二极管的

变流器，它把工频电源变换为直流电源。也可用两组晶体管变流器构成可逆变流器，由于其功率方向可逆，可以进行再生运转平波回路:在整流器整流

后的直流电压中，含有电源6倍频率的脉动电压，此外逆变器产生的脉动电流也使直流电压变动。为了抑制电压波动，采用电感和电容吸收脉动电压

(电流)。装置容量小时，如果电源和主电路构成器件有余量，可以省去电感采用简单的平波回路。逆变器:同整流器相反，逆变器是将直流功率变换为

所要求频率的交流功率，以所确定的时间使6个开关器件导通、关断就可以得到3相交流输出。以电压型pwm逆变器为例示出开关时间和电压波形。控制

电路是给异步电动机供电(电压、频率可调)的主电路提供控制信号的回路，它有频率、电压的“运算电路”， 电路的“电压、电流检测电路”，电动机

的“速度检测电路”，将运算电路的控制信号进行放大的“驱动电路”，以及逆变器和电动机的“保护电路”组成。

(1)运算电路:将外部的速度、转矩等指令同检测电路的电流、电压信号进行比较运算,决定逆变器的输出电压、频率。

(2)电压、电流检测电路:与徊路电位隔离检测电压、电流等。

【英文介绍】

Brand: AB

Model: A-B 20DC460NOENNBNBNE

Order number: A-B 20DC460NOENNBNBNE

Category of origin: Import

Control mode: slip frequency

Appearance: Cabinet type

Supply voltage: Low voltage

Output voltage regulation mode: Other

Properties of DC power supply: current type

The American AB inverter consists of three parts, converting the I-frequency power supply into a DC power "rectifier", absorbing the voltage pulsation generated in the converter and inverter "flat-wave loop rectifier" is used in a large number of diodes

Converter, which converts the power frequency power supply into DC power supply. Two sets of transistor converters can also be used to form a reversible converter, which, because of its reversible power direction, can carry out a regenerative running flat wave loop: rectification in the rectifier

After the DC voltage, contains the pulse voltage of 6 times the frequency of the power supply, in addition, the pulse current generated by the inverter also makes the DC voltage change. In order to suppress voltage fluctuation, inductors and capacitors are used to absorb fluctuating voltage

(Electric current). When the capacity of the device is small, if the power supply and the main circuit component have a margin, the inductance can be omitted and a simple flat-wave loop can be used. Inverters: As opposed to rectifiers, inverters convert DC power to

The AC power of the required frequency can be turned on and off by making 6 switching devices at the specified time to obtain 3-phase AC output. The switching time and voltage waveform are shown by taking a voltage-type pwm inverter as an example. Controls

The circuit is the circuit that provides the control signal to the main circuit of the induction motor power supply (voltage and frequency adjustable), which has the frequency and voltage "operation circuit", the circuit "voltage and current detection circuit", and the motor

The "speed detection circuit", the "drive circuit" that amplifies the control signal of the operational circuit, and the "protection circuit" of the inverter and the motor are composed of.

(1) Operation circuit: the external speed, torque and other instructions are compared with the current and voltage signals of the detection circuit to determine the output voltage and frequency of the inverter.

(2) Voltage and current detection circuit: isolated from loop potential to detect voltage, current, etc.

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