![]() ![]() Although these motors posses high efficiency, the application cost becomes a significant concern. ![]() Motors such as permanent magnet synchronous motor (PMSM), synchronous reluctance motor (SynRM), or switched reluctance motor are energy efficient. However, these motors have comparatively lower efficiency. ![]() The single-phase induction motors (SPIMs) are predominantly used in the wider range of application developments. The increase of efficiency with ZVL is further validated with experimental results on a 300 W 6/4 SR motor which achieves an enhancement in the range of 2-6%. The effect of core material on the ZVL commutation performance is also investigated for the 250 kW 12/8 SR motor. An enhancement of efficiency in the ranges of 0-3% and 0-5% is computed considering operation below base-speed and above base-speed respectively. The lowering of core losses is investigated with finite element modeling of a 250 kW 12/8 SR motor. This paper investigates the energy conversion efficiency of SR motors with ZVL current commutation. The efficiency enhancement provided by ZVL commutation, especially in high-speed SR motoring has not been thoroughly investigated to-date. Zero-voltage loop (ZVL) commutation in switched reluctance (SR) motor operation can result in a significant improvement of their performance by lowering the flux-linkage peaks and harmonic magnitudes of the magnetic flux densities within the core of the SR motor. With an induced current of 0.7 A, the motor achieved a maximum of 900 rpm, indicating possible applications with respect to toys, micro-pumps, dosing pumps, and vessels for gases, liquids, or vacuum that do not require feedthrough. ![]() For this study, an actual micro, axial-flux, single-phase switched reluctance motor with a diameter of 5.5 mm and length of 4.4 mm was built in combination with a wireless charging module and motor circuitry found on the market. This study utilizes the topology method in rotor design to reduce excessive torque ripple. Safety and convenience are also achieved through the use of a wireless drive, which negates the need for power connections or batteries. By reducing the number of magnetic poles and coils in the stator, and by utilizing a cylindrical design for its stator components, the micro motor is able to be easily manufactured and assembled. The rotor and stator each have two poles, and the stator utilizes two permanent magnets to provide the required parking position and rotational torque. This study proposes a novel, axial-flux, single-phase switched reluctance motor for micro machines with wireless-driven capability. ![]()
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