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In this paper, a voltage limiter calculation method for the fast torque response of an interior permanent magnet synchronous motor (IPMSM) when an inverter operates in the overmodulation range is considered. The relation between torque response of an IPMSM and voltage phase angle in the overmodulation range is analyzed, and based on this relation, the optimal voltage limiter calculation method that...
In this paper, torque control scheme for PMSM when an inverter operates in the overmodulation range is proposed and examined. The torque control system has our proposed closed-loop current control system, which harmonic current compensation scheme is used to improve the stability in the overmodulation range. Finally, the overall torque control performance will be evaluated by the experimental results.
For stability of current control system of PMSM in the overmodulation range of an inverter, many harmonic current estimation and compensation methods have been proposed. In these proposed methods, for estimating harmonic currents, the harmonic current models are used, and in these models, parameters of PMSM which are resistance, d and q axis inductances are necessary. The estimation accuracy depends...
Unstable problem of PMSM current control system in the overmodulation range of an inverter is a well known problem, however, the cause and mechanism of this problem are still not investigated well. Actually, the main reasons which are large amount of harmonic components and voltage saturation of an inverter in this range are already known. However, the effects from current controller such as PI controller...
In this paper, we propose two new voltage calculation methods for fast torque response of IPMSM in voltage saturation region, which are maximum torque response method and constant current response ratio method. Compared with the usual methods, which are constant phase angle method, constant back emf method and constant d-axis voltage method, the proposed methods give faster torque response confirmed...
In this paper, we propose a novel current control system for PMSM when an inverter operates in the overmodulation range. Because of the effect from harmonic components generated from an inverter in this range, an unstable problem in current control system will occur. For solving this problem, the method of harmonic currents compensation is proposed. However, the difficulty in this method is that how...
This paper describes the novel current control system of interior permanent magnet synchronous motor (IPMSM) based on model predictive control (MPC). Proposed current controller directly selects one of the switching modes of PWM inverter instead of generating voltage reference as conventional one. The problem with selecting the switching mode to output is formulated as MPC problem, considering actual...
For high performance and wide speed range control of an IPMSM, using the overmodulation range of an inverter is one of the effective methods. However, to use this overmodulation range with the closed loop currents control system, there are many problems occur and the main problem is caused by the harmonic currents generated from harmonic voltages in the inverter output voltages. Therefore, in the...
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