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Due to inclement weather in recent years, the short-circuit fault cannot be ruled out in a short time on power system, and this make the transformer as the main components of the system will withstand the impact of two consecutive short-circuit current in a short time, which makes the winding disks in the initial short circuit without damage, its residual deformation and vibration situation can meet...
A bearingless motor (BM) is an electrical machine with a built-in magnetic bearing element. The stator of the machine is fitted with two sets of windings with different pole-pair numbers, and the pole-pair numbers must be consecutive. The principle of BMs can be applied to most of the conventional motor types, i.e., reluctance motors, induction motors, and permanent magnet synchronous motors (PMSMs),...
Vernier permanent-magnet (PM) motors which exploit magnetic gear effects to modulate the magnetic fields are capable of producing high torque at a relatively low speed [1]-[3]. Due to its structural compactness, high torque density, high efficiency, these motors are very suitable for direct-drive applications such as electric vehicles. A new kind of vernier PM motor has been presented in [4], which...
The transformer is one of the most important equipment of the power system, the accident that the lightning impact damages the transformer insulation often happens[1]. The main design method of transformer longitudinal insulation structure design is the wave process calculation which is basis on the transformer electromagnetic optimization design[2] [3]. So research the wave process of the transformer...
High-bandwidth low-insertion loss solenoid transformers using a multilayered FeCoB magnetic core have been designed, modeled, fabricated, and characterized for high-frequency power conversion. Various transformer designs are compared in terms of inductance, resistance, quality factor, mutual coupling, and insertion loss. A mutual coupling coefficient of 0.9 up to 50 MHz is achieved for intertwined...
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