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标题：基于无刷直流电机的积分变结构控制器抑制转矩脉动 |
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作者：代传波，汪华章 |
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| 2016年第5期 访问次数：307次 |
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摘要：文章基于无刷直流电机设计了一种积分变结构（IVSC）控制器，以抑制转矩脉动。在利用传统电流控制技术中，如果反电动势（EMF）是一种非理想的梯形波，则较易导致转矩脉动。基于此，文章在换流模式与两相导通模式下，设计了一种参考电流优化方法，来优化这两种模式下的参考电流，再通过Luenberge设计出反电动势全阶观测器来观测其波形。在换向期间，在IVSC的作用下，通过计算两相导通模式与换流模式下的电压占空比，系统进行切换控制，促使非换相绕组在换向时跟踪参考电流，使电流变化率得以改变，进而使具有抑制宽带噪声、抗干扰力强的电流控制器以获得最优的相电流，减少转矩脉动。实验表明，该方法能增强无刷直流电机在大负载、高转速条件下的控制性能。
关键词：无刷直流电机；积分变结构；抑制；转矩脉动
Abstract: Based on BLDCM, designed an integral variable structure (IVSC) controller to reduce torque ripple. In the use of traditional current control technology, if the back electromotive force (EMF) is a nonideal trapezoidal wave, are more easily lead to torque ripple. Based on this, in the commutation mode and twophase conduction mode , this article designed a reference current optimization method, to optimize a reference current in both modes, and then designed a fullorder observer of counter electromotive force by Luenberge to observe it waveform. During the commutation, under the action of IVSC, by calculating voltage duty ratio of twophase conduction mode and commutation mode, reversing control system, prompting the tracking reference when reversing phase winding current, to change the current rate, which can inhibit the broadband noise, antijamming power current controller in order to obtain the optimal phase current, reduce the torque ripple. Experiments show that the method can increase the BLDCM control performance under heavy load, highspeed conditions.
Key words: BLDCM; integral variable structure; suppression; torque ripple
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