Abstract
The motor core including a rotor core and a stator core, which is made from silicon steel sheets. Iron loss increases during fixation of the stator core, e.g., by interlocking, welding, and shrink fitting installation. In this paper, the magnetic properties changes by each processing such as wire cutting, punching, interlocking and shrink fitting are investigated. Iron loss of the toroidal cores using punching, interlocking and shrink fitting are increased from 1.16 W/kg to 1.56 W/kg (34.4 % increased) at 50Hz, and from 21.1 W/kg to 27.5 W/kg (30.3 % increased) at 400 Hz compared with iron loss of wire cut toroidal core.
Highlights
Modern society requires a huge amount of energy, especially clean and highly adaptable electrical energy
The motor core includes a rotor core and a stator core, which are made from electrical steel sheets
Iron loss increases during fixation of the stator core, e.g., by interlocking, welding, and thermal insert installations [4-9]. These methods produce a residual stress in the motor core, leading to an increase in the building factor and iron loss of the motor
Summary
Modern society requires a huge amount of energy, especially clean and highly adaptable electrical energy. An increase in rotating machine efficiency leads to huge amounts of electrical energy savings realized in megawatts [1]. Iron loss increases during fixation of the stator core, e.g., by interlocking (mechanical bonding), welding, and thermal insert installations [4-9]. These methods produce a residual stress in the motor core, leading to an increase in the building factor and iron loss of the motor. To realize a high-efficiency motor, the residual stress of the motor core must be figured the process out of the interlocking, welding or the shrink fitting of the core for the motor. The magnetic properties affected by residual stress such as wire cutting, punching, interlocking and shrink fitting
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