5SHX1445H0001 ABB ICGT模块 PLC模块卡件 变频器 伺服控制器

　　5SHX1445H0001 ABB ICGT模块 PLC模块卡件 变频器 伺服控制器

　　5SHX1445H0001 ABB ICGT模块 PLC模块卡件 变频器 伺服控制器

　　5SHX1445H0001 ABB ICGT模块 PLC模块卡件 变频器 伺服控制器

　　主营DCS配件,PLC模块：本特利,英维思,伍德沃德,福克斯波罗,西屋,瑞恩,施德,ABB,Motorola,GE，安川,等等各大品牌的PLC模块,机器人系统配件大型伺服系统备件

　　工控产品基本上都有

　　它采用GTO，SCR或IGCT元件串联的办法实现直接的高压变频，电压可达10KV。由于直流环节使用了电感元件，其对电流不够敏感，因此不容生过流故障，逆变器工作也很可靠，保护性能良好。其输入侧采用可控硅相控整流，输入电流谐波较大。变频装置容量大时要考虑对电网的污染和对通信电子设备的干扰问题。均压和缓冲电路，技术复杂，成本高。由于器件较多，装置体积大，调整和维修都比较困难。逆变桥采用强迫换流，发热量也比较大，需要解决器件的散热问题。其优点在于具有四象限运行能力，可以制动。

　　需要特别说明的是，该类变频器由于较低的输入功率因数和较高的输入输出谐波，故需要在其输入输出侧安装高压自愈电容。

　　高高电压

　　电路结构采用IGBT 直接串联技术，也叫直接器件串联型高压变频器。其在直流环节使用高压电容进行滤波和储能，输出电压可达13.8KV，其优点是可以采用较低耐压的功率器件，串联桥臂上的所有IGBT作用相同，能够实现互为备用，或者进行冗余设计。缺点是电平数较低，仅为两电平，输出电压dV/dt也较大，需要采用特种电动机或加装共模电压滤波器和高压正弦波滤波器，其成本会增加许多。由于它与低压变频器有着一样的拓扑结构，因此它像低压变频器一样具有四象限运行功能，也可以实现矢量控制。

　　这种变频器同样需要解决器件的均压问题，一般需特殊设计驱动电路和缓冲电路。对于IGBT驱动电路的延时也有较其苛刻的要求。一旦IGBT的开通、关闭的时间不一致，或者上升、下降沿的斜率相差太悬殊，均会造成功率器件的损坏.

　　It adopts GTO, SCR or IGCT elements in series to realize direct high-voltage frequency conversion, and the voltage can reach 10kV. Because the DC link uses inductive elements, which are not sensitive to current, it is not easy to have overcurrent fault. The inverter also works reliably and has good protection performance. The input side adopts thyristor phase control rectifier, and the input current has large harmonic. When the capacity of the frequency converter is large, the pollution to the power grid and the interference to the communication electronic equipment should be considered. The voltage equalizing and buffering circuit has complex technology and high cost. Due to many devices and large volume, it is difficult to adjust and maintain. The inverter bridge adopts forced commutation, and its calorific value is relatively large, so it is necessary to solve the heat dissipation problem of devices. The utility model has the advantages of four quadrant operation capability and can be braked.

　　It should be noted that due to the low input power factor and high input and output harmonics of this type of frequency converter, it is necessary to install high-voltage self-healing capacitors at its input and output sides.

　　High high voltage

　　The circuit structure adopts IGBT direct series technology, also known as direct device series high voltage inverter. It uses high-voltage capacitors for filtering and energy storage in the DC link, and the output voltage can reach 13.8kv. Its advantage is that it can use low voltage withstand power devices, and all IGBTs on the series bridge arm have the same function, which can realize mutual standby or redundancy design. The disadvantage is that the level number is low, only two levels, and the output voltage dv/dt is also large. Special motors or common mode voltage filters and high-voltage sine wave filters need to be installed, which will increase the cost. Because it has the same topology as the low-voltage inverter, it has the four quadrant operation function like the low-voltage inverter, and can also realize vector control.