【正文】
ge the maximum current. In effect, the braking process, the speed regulator quickly into saturation, the output amplitude limit for the current loop to provide a maximum current setting, the current regulator for the PI regulator, in its regulatory role under the current remained at the maximum when the system is in fact a constantcurrentconditioning system. Since the current loop so that the regulating role of the system, the braking current transitio n process in the best form of transition closer to the ideal waveform. When the speed overshoot, the speed regulator out of saturation, on speed play a major regulatory role, to bee current with the current loop control system. 2 ? 3. Current feedback loop allows the system to enhance the antiinterference ability, role in the current loop to the channel on the role of all the disturbances, such as disturbances such as voltage, current loop by regulating the timely inhibited, so that speed is not affected or less affected by disturbances. Current speed of the inner ring also played in the transformation of the target structure and regulation of the role of parameters to accelerate the speed of adjustment in response to the process of ring. In characteristics, the speed of the adjustment ring to ensure the system without static error, the role of current loop