PROBLEM TO BE SOLVED: To implement overmodulation PWM control by preventing wind-up when generating a voltage command from a current command under PI control.;SOLUTION: In the case where a result obtained by multiplying a DC bus voltage ebus by a bus voltage utilization rate η is smaller than a terminal voltage command v1*, a wind-up prevention control unit 12 calculates an ACR variable integration gain Kia=0. Current controllers 13 and 14 stop integration functions, and a d-axis voltage command and a q-axis voltage command are calculated by proportional functions. The integration functions of the current controllers 13 and 14 are stopped, thereby preventing integration control due to the current controllers 13 and 14 from being brought into a wind-up state. An AC motor 2 may then be brought into an appropriately controllable state and overmodulation PWM control can be implemented for performing PWM control in a state of overmodulation.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT
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机译:解决的问题:通过在PI控制下从电流命令生成电压命令时防止发条来实现过调制PWM控制;解决方案:通过将直流总线电压e bus <通过总线电压利用率η小于端子电压指令v1 *,防卷起控制部12算出ACR可变积分增益Kia = 0。电流控制器13和14停止积分功能,并且通过比例函数计算d轴电压指令和q轴电压指令。电流控制器13和14的积分功能被停止,从而防止由于电流控制器13和14的积分控制进入卷绕状态。然后可以使交流电动机2处于适当的可控制状态,并且可以实现过调制PWM控制,以便在过调制状态下执行PWM控制。;选择的图纸:图1;版权:(C)2017,JPO&INPIT
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