Implementation of an FPGA-Based Current Control and SVPWM ASIC with Asymmetric Five-Segment Switching Scheme for AC Motor Drives

Abstract

This paper presents the design and implementation of an application-specific integrated circuit (ASIC) for a discrete-time current control and space-vector pulse-width modulation (SVPWM) with asymmetric five-segment switching scheme for AC motor drives. As compared to a conventional three-phase symmetric seven-segment switching SVPWM scheme, the proposed method involves five-segment two-phase switching in each switching period, so the inverter switching times and power loss can be reduced by 33%. In addition, the produced PWM signal is asymmetric with respect to the center-symmetric triangular carrier wave, and the voltage command signal from the discrete-time current control output can be given in each half period of the PWM switching time interval, hence increasing the system bandwidth and allowing the motor drive system with better dynamic response. For the verification of the proposed SVPWM modulation scheme, the current control function in the stationary reference frame is also included in the design of the ASIC. The design is firstly verified by using PSIM simulation tool. Then, a DE0-nano field programmable gate array (FPGA) control board is employed to drive a 300W permanent-magnet synchronous motor (PMSM) for the experimental verification of the ASIC.

Multi-axis Current Loop Control Based on FPGA

“…Improving the bandwidth of the current loop is the most important part of the three-loop control. Therefore, this paper designs a multi-axis current loop control system based on FPGA to meet the requirements of high precision and fast response [5] . Hardware description language is used to realize the hardware logic module and each control module works independently in parallel to improve the control frequency of the motor and avoid the occurrence of delay.…”

Design and Control of Electrical Motor Drives

“…In the paper [2] investigated by Kao et al, current harmonic control improved the three-phase current THD from 5.3% to 2.3%. Tsai et al [3] implemented FPGA-based current control and SVPWM ASIC for AC motor drives, which could reduce power loss by 33% compared to a conventional method. Itajiba et al investigated a Y-∆ starting of induction motors.…”

“…This Special Issue contains the successful invited submissions [1][2][3][4][5][6][7][8][9][10][11] to a Special Issue of Energies on the subject of the "Design and Control of Electrical Motor Drives". Electrical motor drives are widely used in industry, automation, transportation, and home appliances.…”

Phase-Variable Modeling and Comparative Study between a PMa-CPA and a CPA Alternator by Simulation Analysis

“…The modeling can be further classified as d-q modeling and the model in phase-variable form according to the different coordinate reference frames. The former is usually used for developing vector control algorithm in the synchronously rotating d-q reference frame [30,31], and the latter which belongs to circuit component based model can be emulated as a real machine and connected directly to a power electronic converter for system integrated simulation analysis [32][33][34]. In the PSIM simulation tool, there has existed a synchronous machine element in the Motor Drive Module, which can be used as the CPA element for simulation analysis [35].…”