Improved torque in PM brushless motors with minimum difference in slot number and pole number

Ahmad, Mohd Azmier; Manap, Nurul Anwar Abd; Faeq, Maher; Ishak, Dahaman

doi:10.1504/ijpec.2012.048046

Cited by 6 publications

(5 citation statements)

References 11 publications

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“…Figure 9 illustrates the phase currents of a BLDC motor. As the load increases, the motor draws more current [22][23]. When the speed is increased, the current drawn increases [24,25].…”

Section: Results and Analysismentioning

confidence: 99%

A solar fed BLDC motor drive for mixer grinder using a buck converter

Nayak

Shivarudraswamy

2020

IJECE

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In large and small scale applications, different kinds of variable speed driving systems can be found. For saving the energy consumption of these devices, eco-friendly electronics are used, which lead to the development of the Brushless DC motor (BLDC). Its higher power density, higher efficiency, higher torque at low speed, and low maintenance enhances the use of a BLDC motor. The existing mixer grinder consists of the universal motor, which operates in alternating current supply due to high starting torque characteristics and simple controlling of the speed. The absence of brushes and the reduction of noise in the BLDC extends its life and makes it ideal in a mixer grinder. A solar-powered BLDC motor drive for a mixer grinder is presented in this paper. A DC-DC buck converter is utilized to operate the PV (photovoltaic) array at its maximum power. The proposed hysteresis current control BLDC system has been developed in the MATLAB. The commercially available mixer grinder is presented along with the proposed simulated system for performance comparison. It can be concluded that at the no load condition, the efficiency of the experimental existing mixer grinder is 51.03% and simulated proposed system is 81.25% and at load condition, the efficiency of the experimental mixer grinder is 49.32% and simulated system is 79.85%.

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“…Figure 9 illustrates the phase currents of a BLDC motor. As the load increases, the motor draws more current [22][23]. When the speed is increased, the current drawn increases [24,25].…”

Section: Results and Analysismentioning

confidence: 99%

A solar fed BLDC motor drive for mixer grinder using a buck converter

Nayak

Shivarudraswamy

2020

IJECE

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“…Nowadays the series DC motor was eliminated to be replaced by one or two brushless permanent magnet synchronous motors (PMSM). The main advantages of IM over DC machine for the same performance are cost, robustness and reliability [1,2,14,18,19], also the permanent magnet synchronous motor has the advantages of large energy density, high efficiency, long service life and low complexity [8,13,15,16,17,20,22]. Supply and rotational speed control is based on DC thyristor switch, which is DC/DC converter of forced-commutation.…”

Section: Fig 1 Lea 12p3a Battery Mine Locomotivementioning

confidence: 99%

Energy Recuperation as One of the Factors Improving the Energy Efficiency of Mining Battery Locomotives

Polnik

Kaczmarczyk

Niedworok

et al. 2020

Management Systems in Production Engineering

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Mining industry is currently one of the biggest industries in the world. All mines produce “indispensable” minerals, starting from fuels such as coal and ending with noble metals such as gold or copper. Mines in the world compete in the volumes of mined minerals what requires use of state-of-the-art, more efficient and, and what is more important, safer machines. Such trend favors development of technology and mobilize engineers to adapt the technologies that were used so far in easier environment to the needs of the mining industry.The article presents the issue of energy recuperation in mining battery locomotives. Simulation tests of the power supply and control system of the Lea type battery locomotive are discussed. The results of tests on the electric energy consumption of the locomotive during the operational change in the mine were presented, which were referred to the simulation results. Factors influencing the efficiency of energy recovery and the risk resulting from hydrogen emission in the recuperation process have been indicated. Also discussed is the study of the concentration of hydrogen concentration emitted from the battery of lead-acid cells during their recharging in the process of electrical braking with energy recuperation.

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“…Referring to Figure 2 (a), taking 6 slot 8 pole as an example, the coil is short chorded by a pitch angle αp as in equation ( 3) where Ns is number of slot and P is pole of motor [25]. The pitch factor and distribution factor can be calculated using Z. Q. Zhu, M. S. Ahmad and I. Dahaman method [26]- [29] as shown below.…”

Section: Winding Arrangement 31 Pitch Factor and Distribution Factor In Motor Windingsmentioning

confidence: 99%

Winding Arrangement of A New Type Hollow Rotor BLDC Motor

Farina

Firdaus

Ahmad

et al. 2018

IJPEDS

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This paper discusses about winding arrangement of fractional slot of a new type hollow rotor Brushless Direct Current (BLDC) motor. Hollow rotor has higher performance compared to other BLDC motor because it minimizes the unused flux below permanent magnet and maximize torque produce by the motor. It’s also known that 8 pole motor is favorite used in industrial because it has an optimum space of permanent magnet for a smaller motor size. The number of pole will affect the maximum speed of the rotor. Thus, the objective of this research is to investigate the best winding arrangement for 8 pole of hollow rotor that could produce the highest electromagnetic performance. At starts, four combinations of slot number and coil sizes had been selected. Structural comparison in term of coil vector and winding arrangement is studied. Finite Element Method (FEM) had been used to simulate the parameters such as backemf and torque waveforms. It was convinced that 9 slot 8 pole with 0.6 size of coil produces the best performance. The confirmed model had been fabricated and measured. Both results from FEM and measurement are compared in term of backemf and torque where percentage differences are 7.4 % and 8 %, respectively. As conclusion, this research shows the fundamental of winding arrangement of fractional slot of motor especially 8 pole motor.

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Improved torque in PM brushless motors with minimum difference in slot number and pole number

Cited by 6 publications

References 11 publications

A solar fed BLDC motor drive for mixer grinder using a buck converter

A solar fed BLDC motor drive for mixer grinder using a buck converter

Energy Recuperation as One of the Factors Improving the Energy Efficiency of Mining Battery Locomotives

Winding Arrangement of A New Type Hollow Rotor BLDC Motor

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