IC694MDL340 美国GE CPU控制器模块 PLC模块

IC694MDL340 美国GE CPU控制器模块 PLC模块

IC694MDL340 美国GE CPU控制器模块 PLC模块

IC694MDL340转矩给定T_R将来自于速度调节器的SFC_T_R进行转矩限制处理和di/dt运算，求出终的转矩基准IQ_R信号。ID_R是磁通给定信号，它有以下功能:在基速以下，保持磁通恒定，电机恒转矩调速;基速以上，保持电压恒定，磁通按一定比例减少，电机恒功率调速。

处理器主板在矢量计算控制系统完成IGBT触发信号后，把触发脉冲传送到逆变器，控制IGBT导通和关断，得到所需电机近似于正弦波的输入电压和频率，进而调节电机转速。

PLC的I/O响应时间包括输入电路延迟、输出电路延迟和扫描工作方式引起的时间延迟（一般在2~3个扫描周期)等。对开关量控制的系统，PLC和I/O响应时间一般都能满足实际工程的要求，可不必考虑I/O响应问题。但对模拟星控制的系统、特别是闭环系统就要考虑这个问题。

IC694MDL340 美国GE CPU控制器模块 PLC模块

IC694MDL340 torque given T_R will come from the speed regulator SFC_T_R torque limit processing and di/dt calculation, to find the final torque reference IQ_R signal. ID_R is the flux given signal, it has the following functions: below the base speed, keep the flux constant, the motor constant torque speed regulation; Above the base speed, keep the voltage constant, the magnetic flux is reduced in a certain proportion, and the motor is regulated by constant power.

After the vector computing control system completes the IGBT trigger signal, the processor motherboard transmits the trigger pulse to the inverter, controls the IGBT on and off, obtains the input voltage and frequency of the required motor, which is similar to the sine wave, and then adjusts the motor speed.

The I/O response time of PLC includes input circuit delay, output circuit delay and time delay caused by scanning mode (generally in 2 to 3 scanning cycles). For the switching control system, PLC and I/O response time can generally meet the requirements of practical engineering, but do not have to consider the I/O response problem. However, this problem should be considered for systems that simulate star control, especially closed-loop systems.