Position sensorless control of PMSM by synchronous injection and demodulation of alternating carrier voltage
Position sensorless control of PMSM by synchronous injection and demodulation of alternating carrier voltage
复制标题
通过交流载波电压的同步注入和解调对 PMSM 进行无位置传感器控制
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
R. Kennel
中科院分区：
文献类型：
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作者：
Wolfgang Hammel;R. Kennel
具有表面安装永磁体的同步电机 (SMPMSM) 由于其高效率和简单的设计而在工业中非常受欢迎，因此对无位置传感器控制特别感兴趣。这些类型的机器通常具有较小的固有凸极，导致在使用注入的高频测试信号测量转子位置时信噪比较低。因此，有必要避免电流控制器和注入信号之间的任何干扰，以在无传感器控制下实现尽可能高的性能。本文提出了一种将交替载流子注入方案集成到电流控制环路中的新颖方法，而不需要常用的带通滤波器。它使用严格同步的注入和解调方法。这使得定子电流的高频分量对于电流控制器来说完全不可见，并且还消除了电流控制环路中的死区时间。此外，即使在瞬态条件下，解调的交变载波也不会受到基波分量的影响。此外，所提出的解耦方法不需要任何电机参数调整。
Synchronous machines with surface mounted permanent magnets (SMPMSMs) are very popular in industry due to their high efficiency and simple design and are therefore of special interest for position sensorless control. These types of machines typically have small inherent saliencies resulting in a low signal to noise ratio when measuring the rotor position using injected high frequency test signals. It is therefore necessary to avoid any interference between the current controller and the injected signal to achieve the highest possible performance under sensorless control. This paper proposes a novel method for integrating an alternating carrier injection scheme into a current control loop without requiring the commonly used band-pass filter. It uses a strictly synchronous injection and demodulation approach. This allows the high frequency components of the stator current to become completely invisible to the current controller and additionally to eliminate the dead time in the current control loop. Furthermore the demodulated alternating carrier will be unaffected by the fundamental component even during transient conditions. Moreover the proposed decoupling method does not require any motor parameter adjustment.