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首页> 外文期刊>IEE Proceedings. Part B, Electric Power Applications >Speed-sensorless vector control for permanent-magnet synchronous motors based on instantaneous reactive power in the wide-speed region
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Speed-sensorless vector control for permanent-magnet synchronous motors based on instantaneous reactive power in the wide-speed region

机译：基于大速度区域瞬时无功功率的永磁同步电动机无速度传感器矢量控制

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摘要

The paper proposes an implementation of the new sensorless speed-control scheme for a permanent-magnet synchronous motor (PMSM). In the proposed algorithm, the current observer estimates the line currents and the estimated speed can be yielded from the voltage equation because the information of speed is included in back EMF. However, the speed-estimation error between the estimated and the actual speed arises because of the measurement errors of the motor parameters and the sensing errors of the line currents and input voltages. Because the parameters such as machine inertia or a viscosity-friction coefficient depend on the mechanical load which is not constant in most applications, there are many restrictions in the actual implementation. To minimise the speed-estimation error, the estimated speed error is compensated by the instantaneous reactive power. Moreover, to increase productivity, a flux-weakening control algorithm is added to the proposed sensorless algorithm in the high-speed region. The proposed algorithm improves robustness by removing the mechanical equations in the observer and improves performance by adding flux weakening control in the high-speed region.
机译：本文提出了一种用于永磁同步电动机（PMSM）的新型无传感器速度控制方案的实现。在提出的算法中，由于速度信息包含在反电动势中，因此电流观测器可以估算线路电流，并且可以从电压方程得出估算的速度。但是，由于电机参数的测量误差以及线电流和输入电压的检测误差，会导致估算速度与实际速度之间出现速度估算误差。因为诸如机器惯性或粘度-摩擦系数的参数取决于在大多数应用中不是恒定的机械负载，所以在实际实施中存在许多限制。为了最小化速度估计误差，估计的速度误差由瞬时无功功率补偿。此外，为了提高生产率，在所提出的高速区域无传感器算法中增加了弱磁通控制算法。所提出的算法通过消除观测器中的机械方程来提高鲁棒性，并通过在高速区域中添加磁通弱化控制来提高性能。

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