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A simplified analysis of influence of pole pairs on the steady-state behavior of induction motors is presented. The analysis makes simplifying assumptions to express relationship between key steady-state performance parameters of 2-pole reference motor compared to its multiple pole counterparts. The analysis is performed using considerations of fixed geometrical dimensions on one hand and fixed output...
This paper proposes a controller design method for ac motors operating under the maximum torque per voltage (MTPV) condition to explore the available inverter voltage. The control algorithm is developed based on a hexagon voltage manipulating control (HVMC) method to select a truncated output voltage command satisfying the maximum torque generation under the voltage deficit region. The proposed method...
This paper proposes a new design for a spoke-type BLDC motor using a ferrite permanent magnet (Fe-PM) to improve the reliability of the motor. First, the design process for a neodymium permanent magnet free spoke-type BLDC motor without an inserted additional assistant permanent magnet (PM) is presented. The proposed motor is designed by taking into account the demagnetization phenomenon. Second,...
The paper describes a systematic method for optimally designing with multiple objectives and differential evolution algorithms, current regulated electronically controlled synchronous reluctance machines. A large scale study with thousands of designs calculated with a ultra-fast computationally efficient electromagnetic FEA establishes the performance limitations of conventional radially laminated...
This paper provides an experimental discussion on adjustable-speed electrical drives using a modular multilevel cascade converter based on triple-star bridge cells (MMCC-TSBC) when the motor frequency is passing through, or equal to, the supply frequency. The TSBC converter is one of the most suitable candidates for medium-voltage, high-power motor drives with regenerative braking. However, its capacitor-voltage...
This paper presents a newly developed high torque density motor design for electric racing cars. An interior permanent magnet motor with a flux-concentration configuration is proposed. The 18slots/16poles motor has pre-formed tooth wound coils, rare-earth magnets type material, whilst employing a highly efficient cooling system with forced oil convection through the slot and forced air convection...
This research proposes a novel low-voltage inverter-fed motor drive with variable characteristics achieved through the individual winding current control for the automobile traction motor. The independent armature winding with low-voltage inverters can improve the total efficiency by reducing the converter losses. Furthermore, the motor can expand the operating range since the inverters are able to...
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