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Factors Affecting Size of Motor - Part 1
For the same output power, the size of the motor can be reduced by the increase in magnetics/magnetic loading. Reducing the size of the motor by simply reducing the armature/rotor is not viable, as this would limit the space for winding thus hinder ac (electrical loading). By increasing Br of a magnet, however, the magnet size can be reduced, enabling a smaller motor size while maintaining space for ac.
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Factors Affecting Size of Motor -Part 2
For the same output power, the size of the motor can be reduced by the increase in motor speed. For a given output power, if the motor is designed to operate at double the operational speed, only half the torque is required.
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Effect Of Motor Design Parameters On Cogging Torque - Part 1
Cogging torque is one of the major electromagnetic sources for motor noise. Reducing cogging torque results in a quieter motor.
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Factors Affecting Magnet Aging
Various factors like the permeance coefficient (PC) value, density and saturation of the magnet will affect magnet aging.
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Improvement In Mechanical Strength Of Bonded Neo Magnets
Increase in epoxy helps to increase ring crush strength while novolac epoxy can help to improve the crush strength and stress rupture strength at elevated temperatures relative to DGEBA epoxy.
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Latest Technical Developments

Salient features of the magnetizing fixture design and the evaluation on the effect of additional back iron during in-situ magnetization, the use of laminated back iron v/s solid back iron, conductor location and fixture slot shaping.
An optimally designed motor with isotropic bonded neodymium magnets helps in reducing the motor weight and volume by 50 percent to 60 percent compared with the benchmarked ferrite motor.
This paper presents a manufacturing method called Combustion Driven Compaction (CDC) for the manufacture of isotropic bonded NdFeB magnets (bonded Neo). Magnets produced by the CDC method have density up to 6.5 g/cm3 which is 7-10% higher compared to commercially available bonded Neo magnets of the same shape.