Development and Testing of the Torque Control for the Permanent-Magnet Synchronous Motor

SUMMARY SPMSMs (surface permanent magnet synchronous motors) are employed for many industrial applications. SPMSM drive systems should realize a quick torque response and have a wide operating range. For quick current response in the field‐weakening region, a new current control based on final‐state control (FSC) is proposed in this study. FSC settles the state variables in a final state from an initial state with feedforward input during a finite time. In addition, the current response under voltage limit is analyzed by the voltage limit circle of the SPMSM with a transient term.

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“…Now Eqs. (5) and (6) are obtained when the other terms are discretized on the basis of PWM hold. Here ΔT = […”

Section: Spmsm Dq-model and Discretizationmentioning

confidence: 99%

Current Control for SPMSM in Field‐Weakening Region Based on Final‐State Control

Miyajima

Fujimoto

Fujitsuna³

2014

Electrical Engineering Japan

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“…Apart from current vector control, torque control can be implemented via voltage phase control. 4 A simple block diagram of voltage phase control is shown in Figure 2. In the diagram, V a , is voltage reference in polar coordinates.…”

Section: Introductionmentioning

confidence: 99%

High Response Torque Control of IPMSM Using State Feedback Control Based on n-t Coodinate System

Matsuki

Doki

2018

IEEJ Trans. IA

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This paper proposes a torque control method for interior permanent magnet synchronous motors (IPMSMs). The proposed method uses state feedback control based on a new n-t coordinate system and controls the voltage amplitude and phase based on the coordinate system. The t-axis is a tangent line of the constant voltage ellipse, and the n-axis is a normal line of the ellipse. The n-axis current is utilized to place the poles of the transfer function at the desired position and reduce the mutual coupling between the voltage amplitude controller and phase controller. The proposed method realizes a high torque response even under parameter variation for the linear range and over-modulation range of the inverter, including a 6-step mode. The effectiveness of the proposed method was verified by simulation and experimental results. K E Y W O R D S coordinate system, IPMSM, response, state feedback control, voltage phase control Electr Eng Jpn. 2019;206:51-62.

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“…(9), the special controller is utilized for operation in the inverter over-modulation range; however, this control system must switch between the general controller and the special controller. On the other hand, control systems that do not switch to any controllers have already been proposed (4) (5) .…”

Section: Introductionmentioning

confidence: 99%

Position Sensorless Control System within Over-modulation Range Based on Mathematical Model Robust against Magnetic Saturation of IPMSMs

2017

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This paper proposes a position sensorless control system for interior permanent magnet synchronous motors (IPMSMs) within the inverter over-modulation range. In general, using the position sensorless control method in the middle-and high-speed regions requires q-axis inductance, which varies significantly owing to magnetic saturation. Therefore, parameter mismatch may occur, which decreases the motor efficiency and causes control system instability. Furthermore, in the inverter over-modulation range, the performance of the auto current regulator deteriorates significantly because disturbance components, which consist of low-order harmonic current components, are fed back to the controller. As a result, the operation range is not appropriately expanded if no measurements are obtained for these components. First, the robustness against magnetic saturation is increased by constructing a position sensorless control system based on the L d model. Next, a comb-filter-based harmonic current countermeasure method is proposed. The position sensorless control system can expand the operation range in this method. Finally, the effectiveness of the proposed control system is confirmed by several experiments.

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Development and Testing of the Torque Control for the Permanent-Magnet Synchronous Motor

Cited by 130 publications

References 5 publications

Current Control for SPMSM in Field‐Weakening Region Based on Final‐State Control

Current Control for SPMSM in Field‐Weakening Region Based on Final‐State Control

High Response Torque Control of IPMSM Using State Feedback Control Based on n-t Coodinate System

Position Sensorless Control System within Over-modulation Range Based on Mathematical Model Robust against Magnetic Saturation of IPMSMs

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