Ming-Shyan Wang, Seng-Chi Chen, Wei-Chin Fang and Po-Hsiang Chuang
Extensive efforts have been conducted on the improvement of torque ripple in switched reluctance motor (SRM) drive. The purpose of this paper is to estimate initial on time of…
Abstract
Purpose
Extensive efforts have been conducted on the improvement of torque ripple in switched reluctance motor (SRM) drive. The purpose of this paper is to estimate initial on time of pulse-width modulation (PWM) and turn-off angle using the motor speed and rotor angle by fuzzy logic.
Design/methodology/approach
A fuzzy logic control together with the PWM technique and turn-off angle are used to improve torque ripple and dynamic response.
Findings
After determining initial on time of PWM, the rise slope of phase current is increased.
Research limitations/implications
Future work will consider to increase the complex of the fuzzy control to adaptively tune parameters and achieve excellent results.
Practical implications
The experimental results of the proposed method are presented to show the effectiveness.
Originality/value
This paper achieves SRM control by one special PWM technique which is seldom studied.
Details
Keywords
Ying-Shieh Kung, Seng-Chi Chen, Jin-Mu Lin and Tsung-Chun Tseng
The purpose of this paper is to integrate the function of a speed controller for induction motor (IM) drive, such as the speed PI controller, the current vector controller, the…
Abstract
Purpose
The purpose of this paper is to integrate the function of a speed controller for induction motor (IM) drive, such as the speed PI controller, the current vector controller, the slip speed estimator, the space vector pulse width modulation scheme, the quadrature encoder pulse, and analog to digital converter interface circuit, etc. into one field programmable gate array (FPGA).
Design/methodology/approach
First, the mathematical modeling of an IM drive, the field-oriented control algorithm, and PI controller are derived. Second, the very high speed IC hardware description language (VHDL) is adopted to describe the behavior of the algorithms above. Third, based on electronic design automation simulator link, a co-simulation work constructed by ModelSim and Simulink is applied to verify the proposed VHDL code for the speed controller intellectual properties (IP). Finally, the developed VHDL code will be downloaded to the FPGA for further control the IM drive.
Findings
In realization aspect, it only needs 5,590 LEs, 196,608 RAM bits, and 14 embedded 9-bit multipliers in FPGA to build up a speed control IP. In computational power aspect, the operation time to complete the computation of the PI controller, the slip speed estimator, the current vector controller are only 0.28 μs, 0.72 μs, and 0.96 μs, respectively.
Practical implications
Fast computation in FPGA can speed up the speed response of IM drive system to increase the running performance.
Originality/value
This is the first time to realize all the function of a speed controller for IM drive within one FPGA.