NDLI: Parabola-trapezoid and staircase current supply methods for PMBLM with full inverter utility and reduced torque ripple

Content Provider	IET Digital Library
Author	Yang, Yun Jie He, Yang Zhu, Ji Hong
Abstract	The permanent magnet brushless motors (PMBLM) are utilised extensively in many high-performance applications where smoothness of output torque is necessary. When driven with conventional square-wave current, the PMBLM is hard to make full use of inverter capacity because of short current supply time. Besides, it is hard to produce smooth output torque because the phase inductances slow down the desired step response of the phase current seriously. Although the sinusoidal-wave current changes continuously, there exists a fixed-frequency torque ripple for trapezoid back-electromotive force motor. To solve the problems, two novel current supply methods, called as staircase waveform and parabola-trapezoid waveform, are proposed in this study. With the same phase current magnitude as square waveform, the staircase waveform can output two times torque with low-resolution position sensors. The parabola-trapezoid supply method can further improve the smoothness of doubled output torque by unique parabolic rising and falling edge waveform design, while a high-resolution position sensor is needed. Simulation and experimental tests of four different current supply methods are given to corroborate the effectiveness of the proposed method in inverter utility and torque ripple reduction.
Starting Page	527
Ending Page	538
Page Count	12
ISSN	17518660
Volume Number	12
e-ISSN	17518679
Issue Number	Issue 4, Apr (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/12/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2017.0616
Journal	IET Electric Power Applications
Publisher Date	2018-01-22
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	A.C. Machine Brushless Machines D.C. Machines Desired Step Response Doubled Output Torque Fixed-frequency Torque Ripple Full Inverter Utility High-resolution Position Sensor Inverter Capacity Inverter Utility Invertors Linear Machine Low-resolution Position Sonsor Output Torque Smoothness Parabola-trapezoid Waveform Current Supply Method Parabolic Rising-falling Edge Waveform Design Permanent Magnet Brushless Motors Permanent Magnet Motors Phase Current Phase Current Magnitude Phase Inductances PMBLM Power Electronics Power Supply Reduced Torque Ripple Short Current Supply Time Sinusoidal-wave Current Changes Smooth Output Torque Square Waveform Square-wave Current Staircase Waveform Current Supply Method Supervisory Circuit Torque Ripple Reduction Trapezoid Back-electromotive Force Motor
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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