ABB KUC755AE106 3BHB005243R0106 励磁控制器驱动

ABB KUC755AE106 3BHB005243R0106 励磁控制器驱动

ABB KUC755AE106 3BHB005243R0106 励磁控制器驱动

KUC755AE106 3BHB005243R0106同步电动机起动时,转子感应电压的频率随着转速的上升逐渐下降,同步电动机一旦起动,单片机就立即检测转子感应半个周波的时间,从20ms开始,数码管记“9”,中间每增加20ms,数码减1,到200ms时数码管显示"0”。KUC755AE106 3BHB005243R0106同步电动机在异步起动过程中，当转子转速达到同步转速的90%时，转子感应电压的频率5Hz，周期0.2s，半周时间为100ms，计算机一旦检测到该值，立即投全压，投全压后，电动机的转速将继续上升，当转速增加到同步转速的95%时，转子感应电压的频率为2.5Hz，周期为0.45，半周时间为200m，计算机检测到此值，迅速进入整流程序,输出脉冲，装置投入励磁，同时接通投励工作指示,关掉低压灭磁并开放失磁保护和失步保护等。2脉冲形成

KUC755AE106 3BHB005243R0106同步信号Ta、 W3 提供正偏移，及励磁调节器的输出信号Uk,三者通过运算放大器综合处理后作为单片机外部中断请求NT0的输入信号，当INTO从1变0时，单片机接受中断,立即发出第一组脉冲去触发1# 可控砖，同时给6#可控砖补一个脉冲。KUC755AE106 3BHB005243R0106以后每间隔60发下一组脉冲,发相应的可控,直至一个周期六组脉冲发完，再等待下一次中断。改变U的大小就改变了中断申请的时刻。达到控制口的目的。为了提高整流电,乐波形的对称度，系统还不断监测电网的频率，随时对60°定时进行修正，确保整流电压波形对称，这样产生的脉冲精度高,无需外部调整,且稳定可靠。

励磁就是向发电机或者同步电动机定子提供定子电源的装置。 根据直流电机励磁方式的不同，可分为他励磁，并励磁，串励磁，复励磁等方式，直流电机的转动过程中，励磁就是控制定子的电压使其产生的磁场变化，改变直流电机的转速，改变励磁同样起到改变转速的作用。 发电机励磁系统定义 发电机由两大部分组成。 （1） 转子 —— 转子绕组通以直流，用以产生发电机的磁场； （2）定子—— 定子绕组被磁场之磁力线切割，在定子绕组中产生（发出）电流。对于交流发电机，发电机转子被原动机（水轮机、汽轮机、柴油机等）拖动转动，因而转子绕组产生的磁场是旋转的，静止的定子绕组相对运动切割磁力线。

ABB KUC755AE106 3BHB005243R0106 励磁控制器驱动

When KUC755AE106 3BHB005243R0106 synchronous motor is started, the frequency of rotor induced voltage gradually decreases with the increase of rotating speed. Once the synchronous motor is started, the single chip microcomputer immediately detects the time of rotor induced half a cycle, starting from 20ms, the digital tube records "9", and the digital tube displays "0" for every 20ms increase in the middle, and the digital value decreases by 1. KUC755AE106 3BHB005243R0106 synchronous motor in the asynchronous starting process, when the rotor speed reaches 90% of the synchronous speed, the frequency of the rotor induced voltage is 5Hz, the period is 0.2s, and the half-cycle time is 100ms. Once the computer detects this value, it will immediately switch on the full voltage. After the full voltage is switched on, the motor speed will continue to rise. When the speed increases to 95% of the synchronous speed, The frequency of rotor induced voltage is 2.5Hz, the period is 0.45, and the half-cycle time is 200m m. When the computer detects this value, it quickly enters the rectification program, outputs pulses, and the device is excited. At the same time, it turns on the excitation work instruction, turns off the low-voltage demagnetization, and opens the loss-of-excitation protection and out-of-step protection. 2 pulse formation

KUC755AE106 3BHB005243R0106 synchronization signals Ta and W3 provide positive offset and the output signal Uk of the excitation regulator, which are comprehensively processed by the operational amplifier as the input signals of the external interrupt request NT0 of the single chip microcomputer. When INTO changes from 1 to 0, the single chip microcomputer accepts the interrupt, immediately sends out the first group of pulses to trigger the 1# controllable brick, and at the same time supplements a pulse to the 6# controllable brick. KUC755AE106 3BHB005243R0106 After that, send out a group of pulses every 60 intervals, and send out corresponding controllable pulses until six groups of pulses are sent out in one cycle, and then wait for the next interruption. Changing the size of u changes the time to interrupt the application. Achieve the purpose of controlling the port. In order to improve the symmetry of the rectified voltage waveform, the system also constantly monitors the frequency of the power grid, and corrects the 60 timing at any time to ensure the symmetry of the rectified voltage waveform, so that the pulse generated is of high precision, stable and reliable without external adjustment.

Excitation is a device that provides stator power to the stator of generator or synchronous motor. According to the different excitation modes of DC motor, it can be divided into separate excitation, parallel excitation, series excitation and compound excitation. During the rotation of DC motor, excitation is to control the voltage of stator to change the magnetic field, change the speed of DC motor, and change the excitation also plays a role in changing the speed. The generator excitation system defines that the generator consists of two parts. (1) The rotor-rotor winding is energized with DC to generate the magnetic field of the generator; (2) Stator-The stator winding is cut by the magnetic force of the magnetic field, and a current is generated (emitted) in the stator winding. For an alternator, the generator rotor is driven by the prime mover (water turbine, steam turbine, diesel engine, etc.), so the magnetic field generated by the rotor winding is rotating, and the relative motion of the stationary stator winding cuts the magnetic field lines.

ABB KUC755AE106 3BHB005243R0106 励磁控制器驱动