Malaysia, Locked Bag 101, Batu Pahat, 86400, Malaysia. energy cost and environmental friendliness [4]. One of the reasons cited for the popularity of the electric Initially, the rotor, stator, permanent magnet and armature coil of the proposed design are drawn by
· Skewing of either the rotor or the stator stack is a widely applied method for reducing cogging torque and torque ripple in permanent magnet motors. The basic idea behind skewing is to influence the interaction between the stator slots and the rotor magnets. This method is basically making the dR/dθ zero over of each magnet face.
· their risk of demagnetization during a stator short-circuit failure is lower, reliably fixed and bonded in the rotor. The motor have stator outer diameter, rotor outer diameter, air gap, and stack length of the motor are 396 mm, 260 mm, 1.5 mm, and 225 mm, respectively. Meanwhile, in
· structure is formed by a permanent magnet, rotor core, and shaft. The mechanical air gap between the outer and inner stators is 0.5mm. The DSSR-PMG has permanent magnet volume and coil turns for inner and outer stators, which are 630mm3 and 110 turns. The outer and inner diameters of the motor are 156mm and 86mm, respectively. The flux lines show that the flux is evenly distributed along the stator and permanent magnet
skewing stator teeth or rotor magnet poles, notching in teeth, shifting magnet poles pair, and setting the optimum ratio of pole arc to pole pitch. No stator excitation is involved in cogging torque production [2]. Ripple torque components are generated by the interaction of stator
· iron are the rotational speeds of the high-speed field PM rotor, low-speed prime PM rotor and stationary iron pole pieces respectively while p prime, p field,andp iron are the pole pair number of low-speed prime PMs, high-speed field PMs and number of stationary iron pole pieces, respectively. The magnetic gear ratio G r can be expressed as G r = − ω prime ω
· manent magnet rotor and a wound field stator, which is connected to a power electronic switching circuit. The BLDC control drive system is based on the feed-back of rotor position, which is obtained at fixed points typically every 60 electrical degrees for six-step commu-tations of the phase currents [1]. The BLDC motor drives
skewing stator teeth or rotor magnet poles, notching in teeth, shifting magnet poles pair, and setting the optimum ratio of pole arc to pole pitch. No stator excitation is involved in cogging torque production [2]. Ripple torque components are generated by the interaction of stator
· Remember, the rotor won’t slip relative to the stator’s operating frequency. Cost Vs. Performance. One major consideration in permanent magnet motors is the cost of the magnets. If you’ve used high-energy magnets (such as iron neodymium boron), you’ve felt the pain in your budget (or your boss has). The potential waste of stamping the
· stator core. It will reduce cost of manufacture of a stator. In production process stator could be This technology is almost without waste of material in production and is friendly in recycling. Process of Axial length of stator 30 mm Outer rotor (magnet) diameter 38 mm Inner magnet
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· The coil starts to rotate in the same direction as the magnet. In an actual motor, the rotor is like a series of overlapping coils connected together so the rotational force can be generated efficiently. A squirrel cage rotor is a rotor with multiple skewed aluminum and iron bars. In a squirrel cage rotor, current flows in the aluminum part.
· In this study, a waste motor is modified to serve as a generator by installing a permanent magnet in part of the rotor and reinstalling the coil in the stator. The new low cost generator is connected with the blades form a wind turbine set that generates maximally 6 kW electric power.
· for the main radial °ux penetrating the stator and the rotor ring. The rotor yoke °ux density allowable for radial-°ux induction motor is 0 4T to 1 6T [24] (this range is also used here). The mechanical strength of the solid rotor ring (unlike that of the laminated rotors) was not a problem, where the mechanical constraints may thus determine the
· Disadvantages Of Rare-earth Permanent Magnet Motors. High cost Compared with the asynchronous motor of the same specification, the air gap between the stator and the rotor is smaller, and the processing accuracy of each component is high the rotor structure is more complicated and the price of rare earth magnetic steel material is high
· energies Article Power Characteristics Analysis of a Novel Double-Stator Magnetic Geared Permanent Magnet Generator Shehu Salihu Mustafa 1,*, Norhisam Misron 1,2,*, Mohammad Lutfi Othman 1 ID and Hanamoto Tsuyoshi 3 1 Department of Electrical & Electronic, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia lutfi@upm.edu.my
· In order to achieve low-cost energy efficiency improvement based on the existing low-energy-efficiency induction motor drive system, it is remanufactured by permanent magnetization, replace the squirrel cage rotor with a permanent magnet rotor, and replace electric excitation with rare earth permanent magnet excitation, thereby reducing the excitation loss in the stator windings during synchronous operation, there is no induced current in the rotor, so there is no copper loss in the rotor
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· material cost reduction in the manufacturing process. When the electromagnetic design is changed to reduce the waste in the manufacturing process (stamping of the laminations) by dividing the stator toroidal ferromagnetic core into two equal parts, Rotor/magnet outer diameter d m 18 mm Stator inner diameter d s 34 mm Stator outer diameter d
· permanent magnet. The stator and the rotor cores are made of pre-cut transformer lamination silicon steel (gauge 26, M19). The stator and rotor cores can be made on a per pole basis, reducing the cost of complete dies required to stamp a conventional lamination configuration. The geometry of the stator and the rotor core could have been
· armature current reversal. The possible number of rotor pole and stator slot is defined by, L q r _ r m p @s G i 6 o A (1) where k is natural entity from 1 to 5, q is number of phases having value 3, N rotor is the number of rotor poles and N stator is the number of stator slots having value 6 in the
· Stator and Rotor Conductors For a motor, either the stator or the rotor can be permanent magnet. When the stator is an electromagnent instead of a permanent magnent, it will be a field coil or field winding, made of either copper or aluminum. For an induction motor, the rotor can be either wound type or squirrel-cage type.
· used in IPMSM is very high, which increases the cost of the machine. Therefore, a new topology of permanent magnet flux switching motor using wedge-shaped PM and single stator structure with the advantages of simple stator design, robust rotor structure, high of torque and power, and high efficiency is proposed.
· eccentricity and the air gap between the stator halves. They are both associated with and affected by the man-ufacturing process. In this paper, they will be referred to as manufacturing irregularities • rotor eccentricity a rotor is eccentric, when it is closer to one side of the stator than to the side that is dia-metrically opposite to it [20]
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Profitable recycling of scrap electric motors is now possible with the SB Recycling Machinery Electric Motor Wrecker. The working cycle of this revolutionary machine can be described in the following 3 steps The wrecking of cast iron motor housing and removal of the stator/rotorThe splitting of the stator or transformer block in 2 equal partsSeparating iron and copper of the stator
· The generated stator flux together with the rotor flux, which is generated by a rotor magnet, defines the torque, and thus speeds, of the motor. [1] 2.3 The operation of synchronous motor A permanent magnet synchronous motor is driven by sine wave voltage coupled with the given rotor position. The generated stator flux together with the
· Disadvantages Of Rare-earth Permanent Magnet Motors. High cost Compared with the asynchronous motor of the same specification, the air gap between the stator and the rotor is smaller, and the processing accuracy of each component is high the rotor structure is more complicated and the price of rare earth magnetic steel material is high
· started from the north pole of permanent magnet in the rotor. Then it impels the flux through the air gap into the stator yoke teeth and travel along the stator yoke and stator core. Subsequently, the flux proceeds across the air gap and then come into the rotor core throughout the south pole of permanent magnet. As can be seen, the correct
· of single rotor double stator that comprises two systems in one machine, the motor and the generator. These two systems are separated by an aluminum sheet functionally as a flux insulator. The generator system will harvest the energy from the permanent magnet field of rotor rotation and converted to electrical energy and supplied to other low
· Stator Slots Table12 Rotor Poles 14 Rotor Outer Radius 50mm Rotor Inner Radius 36.7mm Stator Outer Radius 36.2mm Stator Inner Radius 18.1mm Rotor Pole Height 8.3mm Rotor Pole Width 3.9mm Permanent Magnet Width 3.15mm Stator Tooth Width 3.15mm Slot Area 38.329mm2 Stator Back Length 5.74mm Rotor Yoke Length 5mm Air Gap 0.5mm
· The innovation is in the rotor. The rotor is made from laminated iron layers which form a light but solid construction that allows magnetism to flow through it. The shape is precisely designed to guide magnetic reluc-tance within the rotor. As a result, the rotor will align itself to the magnetic flux produced by the stator coils, essentially