Examination of Enhancing Efficiency of Axial Gap Motor in High Speed and High Torque Region by Adopting Neodymium Bonded Magnet

2020 ◽  
Vol 140 (12) ◽  
pp. 939-948
Author(s):  
Ren Tsunata ◽  
Masatsugu Takemoto ◽  
Satoshi Ogasawara ◽  
Koji Orikawa ◽  
Tatsuya Saito ◽  
...  
Keyword(s):  
High Speed ◽  
High Torque ◽  
Bonded Magnet

scholarly journals Examination of Enhancing Efficiency of Axial Gap Motor in High Speed and High Torque Region by Adopting Neodymium Bonded Magnet

2021 ◽  
Author(s):  
Ren Tsunata ◽  
Masatsugu Takemoto ◽  
Satoshi Ogasawara ◽  
Koji Orikawa ◽  
Tatsuya Saito ◽  
...  
Keyword(s):  
High Speed ◽  
High Torque ◽  
Bonded Magnet

scholarly journals Optimization of Air Gap Length and Capacitive Auxiliary Winding in Three-Phase Induction Motors Based on a Genetic Algorithm

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4407
Author(s):  
Mbika Muteba
Keyword(s):  
Genetic Algorithm ◽  
Design Process ◽  
Power Factor ◽  
High Speed ◽  
High Efficiency ◽  
Air Gap ◽  
Element Analysis ◽  
Three Phase ◽  
High Torque ◽  
Cage Induction Motor

There is a necessity to design a three-phase squirrel cage induction motor (SCIM) for high-speed applications with a larger air gap length in order to limit the distortion of air gap flux density, the thermal expansion of stator and rotor teeth, centrifugal forces, and the magnetic pull. To that effect, a larger air gap length lowers the power factor, efficiency, and torque density of a three-phase SCIM. This should inform motor design engineers to take special care during the design process of a three-phase SCIM by selecting an air gap length that will provide optimal performance. This paper presents an approach that would assist with the selection of an optimal air gap length (OAL) and optimal capacitive auxiliary stator winding (OCASW) configuration for a high torque per ampere (TPA) three-phase SCIM. A genetic algorithm (GA) assisted by finite element analysis (FEA) is used in the design process to determine the OAL and OCASW required to obtain a high torque per ampere without compromising the merit of achieving an excellent power factor and high efficiency for a three-phase SCIM. The performance of the optimized three-phase SCIM is compared to unoptimized machines. The results obtained from FEA are validated through experimental measurements. Owing to the penalty functions related to the value of objective and constraint functions introduced in the genetic algorithm model, both the FEA and experimental results provide evidence that an enhanced torque per ampere three-phase SCIM can be realized for a large OAL and OCASW with high efficiency and an excellent power factor in different working conditions.

scholarly journals Development of High-Speed/High-Torque MR Actuator Using Silicon Steel Sheet

2004 ◽  
Vol 70 (698) ◽  
pp. 2886-2893 ◽  
Author(s):  
Yuhei YAMAGUCHI ◽  
Junji FURUSHO ◽  
Takehito KIKUCHI ◽  
Shin'ya KIMURA
Keyword(s):  
High Speed ◽  
Steel Sheet ◽  
Silicon Steel ◽  
High Torque

A Study on the Rod Type Ultrasonic Motor

2013 ◽  
Vol 716 ◽  
pp. 600-607 ◽  
Author(s):  
Jwo Ming Jou
Keyword(s):  
Rotational Speed ◽  
High Speed ◽  
Mechanical Systems ◽  
Ultrasonic Motor ◽  
Experimental Results ◽  
High Loading ◽  
Optical Lens ◽  
Maximum Loading ◽  
High Torque ◽  
Low Torque

This study is to explore a rod type ultrasonic motor, it can solve the traditional ultrasonic motor with a high speed, but only low torque (or low loading ability) the shortcomings. Or want to improve the traditional ultrasonic motor with high torque (or high loading ability), but speed is too low the drawback. In other words, this study is expected to perform the ultrasonic motor, hope that we can have both higher speed and higher torque of the effect (or higher loading ability), and it can be applied to drive the optical lens (or electro-mechanical systems ) or applied to toggle the slider (or linear rails ). Based on the experimental results, we found that maximum rotational speed is 200rpm under conditions of 180Vp-p, 33.7kHz and 53gw preload. And the maximum loading ability and torque is respectively 4.13kgw and 0.273Nm under conditions of 180Vp-p, 33.7kHz and 15rpm rotational speed. Under similar size and driving conditions, its rotational speed is 3.8 times that of the conventional ultrasonic motor and the loading ability is 7.0 times the conventional ultrasonic motor.

The Timing Control Research for the Motor in Wheel

2014 ◽  
Vol 496-500 ◽  
pp. 1356-1359
Author(s):  
Chuan Xue Song ◽  
Si Lun Peng ◽  
Shi Xin Song ◽  
Jian Hua Li ◽  
Feng Xiao
Keyword(s):  
Permanent Magnet ◽  
Control Strategy ◽  
High Speed ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Motor Simulation ◽  
Timing Control ◽  
Control Research ◽  
Speed Performance ◽  
High Torque

For the permanent magnet synchronous motor used in electric vehicle wheel, in order to obtain high torque at low speed, a lot of pole pairs are designed in the structure. So the electrical angle will rotate too fast, and the commutation delay will appear apparently at high speed. The commutation process of permanent magnet synchronous motor is analyzed and the timing control according to rotate speed is deduced. A motor simulation model is built to verify the control strategy. The result shows that the strategy can effectively improve high speed performance of motor.

scholarly journals Rotor Suspension and Stabilization of Bearingless SRM using Sliding Mode Controller

2018 ◽  
Vol 7 (1.8) ◽  
pp. 214
Author(s):  
Polamraju. V.S.Sobhan ◽  
G V. Nagesh Kumar ◽  
P V. Ramana Rao
Keyword(s):  
High Speed ◽  
Sliding Mode ◽  
Dynamic Performance ◽  
Sliding Mode Controller ◽  
Displacement Control ◽  
Switched Reluctance ◽  
Speed Regulation ◽  
High Torque ◽  
High And Low Temperatures ◽  
Control Methodology

Motors working in extreme conditions such as ultra high and low temperatures, high contamination, high purity etc. require high maintenance of mechanical bearings and the regular lubrication. Hence there is a need of a motor without mechanical bearings and lubrication in addition to simple in control and less maintenance. There by, bearingless motors (BLMs) gain more attention. The bearingless switched reluctance motor’s (BLSRM)  is simple in construction and economical in addition to high speed capacity and high torque to inertia ratio. The magnetic nonlinearity arising due to double salient structure makes rotor eccentric displacement control and speed regulation complicate and needs robust control methodology such as sliding mode control (SMC) which has integrity, high certainty and rapid dynamic response when compared to typical controllers. Sliding mode can be realized with distinct classical reaching laws. This paper presents design and implementation of a SMC for a 12/14 BLSRM and the dynamic performance is endorsed by simulation using Matlab software.

Performance of Undershot Waterwheel Curved Blade of the Laboratory Scale

2019 ◽  
Vol 967 ◽  
pp. 250-255
Author(s):  
Irwan Lie Keng Wong ◽  
Atus Buku ◽  
Josefine Ernestine Latupeirissa ◽  
Herby Calvin Pascal Tiwouy
Keyword(s):  
Rural Areas ◽  
High Speed ◽  
Large Diameter ◽  
Small Diameter ◽  
Water Source ◽  
High Flow ◽  
The People ◽  
Flow Speeds ◽  
Curved Blade ◽  
High Torque

Undershot waterwheels have been used by the people in rural areas to lift and distribute the water to the bottom which is higher than the water source. Waterwheels has a relatively simple design, large diameter, high speed and high torque. But applying it as a microhydro with high speed and small diameter still has to be explored. Waterwheels can operate efficiently in locations with high flow speeds. The Waterwheel functions from a waterwheel blade as a place to ride water so that the wheel can spin. From the results of the study, it can be concluded that the higher the flow of water with a large number of buckets, the speed of rotation of the wheel will be slower. Conversely, the lower the flow of water with the number of buckets a little then the spinning wheel is faster.

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