Cogging torque reduction of Interior Permanent Magnet Synchronous Motor (IPMSM)

The linear switched reluctance machine (LSRM) has all advantages of rotary switched reluctance machine including simple and rugged structure, absence of magnetic material and windings on translator, high reliability and appropriate performance over a wide range of speed. Like rotary switched reluctance motor with segmental rotor, segmental translator linear switched reluctance motor (STLSRM) has capability to produce higher output power/weight in comparison to the conventional linear switched reluctance motors. Due to high advantages of the STLSRM drive, various control algorithms including current control, model predictive control, direct force control, universal control and force distribution function are investigated for the first time to control the instantaneous thrust of this motor. Applying these algorithms to a typical three-phase STLSRM, simulation results are presented and they are compared together from the force ripple reduction point of view.

Section: The Femmentioning

confidence: 99%

Instantaneous Thrust Control of the Linear Switched Reluctance Motors with Segmental Translator

Ganji

Zare

2019

“…Although, there are some other PMBL motors that their phase back-EMF voltages are neither ideal trapezoidal nor sinusoidal which have their own control considerations. This difference is due to the pole arrangement on the rotor and stator winding distribution that in PMSM is sinusoidal distributed, whereas in BLDC motor it is distributed as uniform or centralized distribution [16]. In terms of economic considerations and production constraints, making a stator core with a centralized distribution is much simpler.…”

Section: Brushless Motor and Drive Systemmentioning

confidence: 99%

Technical and Economic Considerations for using of Permanent Magnet Brushless Motors in Evaporative Water Coolers

Niasar

NikKhah

EshratAbadi³

2018

Evaporative coolers due to their low cost are used in hot and dry regions of many countries especially in Iran. Conventional evaporative coolers use single-phase induction motors (SPIMs). But the benefits of these motors are very low, and their substitution with high efficient electrical motors is considered by industrial parties. In this paper, the details of using the brushless motor in the application of evaporative cooler are presented. A 1/2 hp brushless motor and drive are designed and built. This motor-drive is tested by a dynamometer and standard testing equipment. Also, for the approval of this motor-drive, a 5000 m 3 /h direct evaporative water cooler equipped with this motor is examined under the airflow rate test in the reference laboratory. The results obtained in both tests are compared with the test results of a typical SPIM. The results verify an increase of at least 60% for energy efficiency compared to evaporative coolers equipped with SPIM.Moreover, a new control scheme based on power control instead of speed control is proposed to stabilize the outlet airflow rate. The results indicate that use of brushless motors in this application can offer considerable energy saving, and helps to protect environment. 2

“…Optimized designs to improve the torque capability and reduce the torque ripple are reported [5,10,11]. For slotted LATMs, stator shape optimization for example asymmetrical teeth stator, and for slottless LATMs, performance optimization by the design parameters are main methods that are recently investigated.…”

Section: Introductionmentioning

confidence: 99%

Analytical Study, Design and Optimization of Radial-Flux PM Limited-Angle Torque Motors

Yazdanpanah

2020

This paper presents an analytical study of the radial-flux slotless limited-angle torque motors. The modelling is based on the magnetic equivalent circuit of the actuators and uses the electromagnetic equations to calculate the air-gap flux as well as the produced torque. This model is then used for designing the actuators both in outer-rotor and innerrotor structures, considering the design constraints and desired characteristics. As the objectives in design stage usually conflict with each other, an intelligent multi-objective optimization algorithm is required to design the best fit actuators. Analytical and simulation results are presented and compared to show the accuracy of the model and verify the design equations as well as the design approach. As this type of actuators is a key element in industrial control, the contributions of this paper are focused on new analytical field solution based on magnetic equivalent circuit, design and optimization approach for radial-flux structure and introducing a general procedure that could be extended to similar structures and actuators.