Jaehyuck Kim

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Low-cost switched-reluctance-motor (SRM) drive systems are actively sought for high-efficiency home appliances and power tools. Minimizing the number of switching devices has been in power converters that is the main method to reduce drive costs. Single-switch-per-phase converters have been cost effective due to the compactness of the converter package(More)
Elimination of rotor position sensors mechanically coupled with the rotor shaft is attractive to variable speed drives primarily due to increased system reliability and cost reduction. In this regard, search for a simple and robust position sensorless control has been intensified in past few years specifically for low-cost, high-volume applications such as(More)
This paper presents a low-cost energy-efficient variable-speed drive for high-volume applications, such as home appliances, fans, and hand tools. A new low-cost power converter is proposed, and the drive system is realized using a two-phase switched reluctance motor and the proposed converter. The motor is capable of self-starting at any rotor position and(More)
A new low-cost, brushless variable-speed drive requiring only a single controllable switch is presented. The proposed converter (referred to as new single-switch converter) overcomes the drawback of the original single-switch-based four-quadrant motor drive in terms of recovery energy circulation. The drive system is realized using an asymmetric two-phase(More)
A high efficiency low cost two-phase switched reluctance motor (SRM) drive system for high speed and large volume applications is developed and presented in this paper. The drive system is realized using a two-phase switched reluctance machine driven by a low cost split AC converter. The machine has self-starting capability at any rotor position and is(More)
This paper discusses development of a 3.5kW switched reluctance motor (SRM)-based electric compressor, focusing primarily on the design aspects of the SRM and the integrated controller. SRM's operation capability at high speed and high temperature in addition to increased price of rare earth magnets makes the SRM a viable alternative to the permanent magnet(More)
A novel low cost two-switch converter for a switched reluctance motor (SRM) is proposed. The converter has a low cost single-switch-per-phase (SSPP) configuration. The drive system is realized using a two phase SRM and the proposed converter. It is capable of self starting with no auxiliary means of starting as required in conventional two phase machines(More)
Low cost brushless motor drive systems are actively sought for high efficiency home appliances and power tools. Minimizing the number of switching devices has been in power converters is the main method to reduce drive costs. Single-switch-per-phase converters have been cost-effective due to compactness of the converter package resulting in a possible(More)
A recent increase in the number of diverse leisure activities and family outdoor activities has increased the need for the automobile-embedded vacuum cleaner. To date, this technology has not been applied in Korea and development efforts are not underway. Many of the existing portable cleaners connecting to the lighter jack of the vehicle use a direct(More)
Position estimation that uses only active phase voltage and current is presented, to perform high accuracy position sensorless control of a SRM drive. By extracting the amplitude of the first switching harmonic terms of phase voltage and current for a PWM period through Fast Fourier Transform (FFT), the flux-linkage and position are estimated without(More)
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