Fluctuating Current Control Method for a PMSM Along Constant Torque Contours

Abstract

The dc-link voltage fluctuation problem is more serious for an inverter system which utilizes a single phase ac source. As an effort to reduce the dc-link capacitance, there is a tendency to make torque oscillate in synchronism with the input power. Then, the fluctuating motor power matches the converter power. The key idea is to enforce current oscillation along a constant torque line which only affects the reactive power of the motor. In other words, the proposed method uses the motor as inductive energy storage by controlling the motor flux by the reactive current component. Analytic method for obtaining the current bounds was derived. Also, a practical recursive algorithm was proposed. Simulation and experimental results support the effectiveness of the proposed method.Index Terms-Inverter, permanent magnet synchronous motor (PMSM) drive, reactive power, small dc-link capacitance.

Comparison and Ranking of Metaheuristic Techniques for Optimization of PI Controllers in a Machine Drive System

“…There are two main categories of AC motors: induction motors (IM) and synchronous motors (SM), the last one, are gaining great attention due to its self-excitation, high efficiency, low maintenance cost, high power density, fast dynamic response, high torque-to-inertia, and more economic maintenance compared to direct current and induction machines. [3,4].…”

Analysis and implementation of a new method to retain the original speed and torque of synchronous reluctance motor during sustained voltage dip

“…The analysis of PMSM drive with fluctuating dc bus is discussed in [25], where the fluctuation magnitude is considered to be 5%-6% of the maximum dc-link voltage. The focus was to counter the dc-link fluctuation and size reduction of dc-link capacitance.…”

Adaptive PID Speed Control Design for Permanent Magnet Synchronous Motor Drives

“…to their simplicity, ruggedness, and low production costs [1]- [5]. Despite that, the PMSMs are gradually taking over the IMs owing to their high efficiency, low maintenance cost, and high power density.…”

“…There are two main categories of the ac motors: induction motors (IMs) and permanent magnet synchronous motors (PMSMs). Nowadays, the IMs are used in about 70% of industrial electric motors due The authors are with the Division of Electronics and Electrical Engineering, Dongguk University, Seoul 100-715, Korea (E-mail: tonducdo@dongguk.edu).to their simplicity, ruggedness, and low production costs [1]- [5]. Despite that, the PMSMs are gradually taking over the IMs owing to their high efficiency, low maintenance cost, and high power density.…”