Proceedings ArticleDOI
A very low-loss motor overvoltage suppression filter using energy recovery concept
Kuen-faat Yuen,H. S-H Chung +1 more
- pp 2280-2287
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TLDR
In this article, a motor protection filter with energy recycling was proposed, which can protect the motor against insulation damage and works out the drawbacks of most recent passive filter networks such as RLC filter and RC filter.Abstract:
Overvoltage phenomenon occurs at AC motor terminal fed by pulse width modulation (PWM) inverter drives. To protect the motor against insulation damage, many passive filter networks such as RLC filter and RC filter have been developed. However, they are either physically large and generally energy inefficient or cannot alter the wavefront of the pulses at the motor terminal to improve the inter-coil and inter-turn voltage distributions in the motor. This paper presents a motor protection filter with energy recycling which can protect the motor against insulation damage and works out the drawbacks of most recent filter networks. It has very small power loss comparing with the commonly used filters. The method is based on recycling the energy gained from suppressing the motor terminal voltage back to the whole system. An experimental filter has been built and evaluated on a 1-hp three-phase motor drive system. A comparative study into the performance among the commonly-used RC filter, RLC filter and proposed filter will be provided.read more
Citations
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Journal ArticleDOI
Modeling, Design, and Implementation of a Power Conversion System for Small-Scale High-Altitude Wind Power Generating System
TL;DR: In this article, a portable power conversion system (PCS) for small-scale high-altitude wind power (HAWP) generating system is presented. And the proposed PCS consists of a three-level Vienna rectifier for the generation side control, a soft-switched half-bridge dc-dc converter for isolation and step down, and a two-level inverter for grid interface.
References
More filters
Book
Instantaneous power theory and applications to power conditioning
TL;DR: The p-q theory in three-phase, four-wire Shunt Active Filters as discussed by the authors has been applied to power flow control in power electronics equipment and has been shown to be useful in many applications.
Proceedings ArticleDOI
Transient effects in application of PWM inverters to induction motors
TL;DR: In this paper, the effect of nonsinusoidal wave-shapes when supplied from adjustable-frequency inverters on the insulation properties of SCI motors is investigated and voltage reflections are simulated for various cable lengths and risetimes.
Journal ArticleDOI
High-frequency modeling for cable and induction motor overvoltage studies in long cable drives
TL;DR: In this paper, the authors used several lumped segments incorporating a lossy representation of the line are used to model the cable and induction motor models may be implemented using MATLAB, thereby providing a convenient method to analyze the overvoltage phenomena.
Proceedings ArticleDOI
Interaction of drive modulation and cable parameters on AC motor transients
TL;DR: Novel modifications to the PWM modulator as well as external hardware apparatus are proposed solutions to the >2 pu overvoltage problem, both are simulated and experimentally confirmed.
Journal ArticleDOI
A Passive EMI Filter for Eliminating Both Bearing Current and Ground Leakage Current From an Inverter-Driven Motor
Hirofumi Akagi,S. Tamura +1 more
Abstract: This paper presents a practical approach to eliminating both bearing current and ground leakage current from an inverter-driven motor rated at 400 V and 3.7 kW. When the shaft voltage with respect to the motor frame exceeds the dielectric breakdown voltage of thin lubricating grease films in two metal bearings at the drive and non-drive ends, an electrical discharge machining (EDM) current flows through the bearings. A passive electromagnetic interference (EMI) filter can keep the shaft voltage in check, as a result of having eliminated high-frequency common-mode voltage from the motor terminals. Hence, no dielectric breakdown occurs in the grease films, so that no EDM current flows in the bearings. Experimental results verify the viability and effectiveness of the passive EMI filter designed in this paper