380-480V西门子变频器200kW三相
6SE64402UD420GA1
6SE64402UD420GB1
希殿电气技术(上海)有限公司(西门子合作伙伴)
Xi Dian Electrical Technology (Shanghai) Co., Ltd. (SIEMENS partner)
6SE6440-2UD42-0GB1
MICROMASTER 440 无滤波器 380-480V+10/-10% 三相交流 47-63Hz 恒定转矩 200kW 过载 136% 57S,160% 3S 二次矩 250kW 1533x 326x 545(高x宽x深) 防护等级 IP20 环境温度 0-40°C 无 AOP/BOP
6SE6440-2UD42-0GA1MICROMASTER 440 无滤波器 380-480V+10/-10% 三相交流 47-63Hz 恒定转矩 200kW 过载 136% 57S,160% 3S 二次矩 250kW 1533x 326x 545(高x宽x深) 防护等级 IP20 环境温度 0-40°C 无 AOP/BOP
标准变频器驱动多台电机的应用
问题:标准变频器如何驱动多台电机?
答案: 如果客户使用一台变频器驱动多台电机,需要注意如下事项:
一、 变频器选型:
1) 根据电机额定输出电流总和估算变频器的额定输出电流。
2) 根据估算的变频器额定输出电流,适当加大变频器的裕量。
二、 电机保护:
1) 在每个电机回路单独安装过电流保护,过载保护。
2) 由于变频器输出电压波形是脉宽调制波,会引发保护器件的额外发热,需要考虑保护器件的选型裕量,以防止电机频繁保护跳闸。
3) 每台电机安装过温保护。
三、 限制条件
1) 所有电机电缆总长度加和,不能超过变频器的允许范围。
2) 对于电机电缆超长情况, 可以考虑变频器输出用一根母线连接到现场,到现场后再分线至每台电机。
3) 推荐变频器输出侧安装电抗器。
4) 变频器一般采用 V/F 控制方式。
5) 对所有电机一般要求同时启动、同时停止。
6) 在变频器运行中,一般不允许进行电机的投切操作。
Application of multiple motors driven by standard frequency converter
Question: how does a standard inverter drive multiple motors?
Answer: if a client uses a frequency converter to drive multiple motors, it is necessary to pay attention to the following items:
1. Type selection of frequency converter:
1) the rated output current of the inverter is estimated according to the sum of the rated output current of the motor.
2) according to the rated output current of the frequency converter, increase the margin of the frequency converter appropriately.
Two. Motor protection:
1) over-current protection and overload protection are installed in each motor loop.
2) because the output voltage waveform of the inverter is pulse width modulation wave, it will cause additional heating of the protection device, so we need to consider the protection margin of the device to prevent frequent tripping.
3) each motor is protected by over temperature.
Three. Restrictive conditions
1) the total length of all motor cables can not exceed the allowable range of the frequency converter.
2) for the super long condition of electric cable, the output of a converter can be connected to the site with a bus, and then the line is separated to each motor after the field.
3) it is recommended to install the reactor at the output side of the inverter.
4) the frequency converter usually uses V/F control mode.
5) all motors are generally required to start at the same time and stop at the same time.
6) in the operation of the frequency converter, the switching operation of the motor is generally not allowed.
MM440 使用三线控制变频器
问:MM440 使用三线控制,一个起动按钮,一个停止按钮控制变频器运行。
答:MM440 默认为使用2线控制,只用一个开关量做起动/停止控制。用户可通
过使用内部自由功能块实现此功能。
功能块连接
功能块连接
相关参数设置
P0700[0] = 2 选择命令源
P0701[0] = 99 选择DI1功能
P0702[0] = 99 选择DI2功能
P0840[0] = 2841 选择运行命令源
P2800[0] = 1 使能自由功能块
P2801[9] = 1 激活非门
P2801[14]= 1 激活RS触发器
P2828 = 722.1 非门
P2840[0] = 722.0 RS触发器置位端
P2840[1] = 2829 RS 触发器复位端