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This paper presents a biased flux hybrid-excited flux switching (BFHEFS) machine to improve the flux adjustability. The proposed configuration adopts E-core to enhance the permanent magnet (PM) material utilization ratio, which use half PMs of the conventional flux switching PM (FSPM) machine. The flux-adjusted principle of the E-core BFHEFS machine is introduced to explain the better flux adjustability...
A novel model of space electromagnetic docking is established to solve the problem of traditional plume contamination and short service life in this paper. A new modelling technique regarding space electromagnetic docking for CubeSat is proposed. The mathematical model with four core-containing energized solenoids is derived and simplified to the magnetic dipole far-field model of single-turn coil...
The control problem of underactuated spacecraft chaotic attitude motion is investigated based on exponential reaching law in this paper. First, the underactuated spacecraft chaotic attitude system is written in nonlinear equation form with two controls. Once the trajectory planning of angular acceleration is preset, the dynamics equation of angular velocity error can be obtained. Then, the sliding...
In multi-phase machines, the third harmonic current can interact with the third harmonic back-EMF to improve the output torque. This paper investigates the unequal tooth width and permanent magnet (PM) segmentation techniques to improve the third harmonic back-EMF of the five phase 10-slot/8-pole surface-mounted permanent magnet (SPM) machine. It is found that the fundamental and third harmonic winding...
The converter of multi-phase switched reluctance motor (SRM) requires both less switch devices and independence between phases for low-cost and high- efficiency. To achieve the above requirements, a novel N+2 power converter is employed in this paper. New converter topology combines the advantages of both asymmetric half bridge converter and split phase converter. In the base of the split phase converter,...
SRM is suitable to be used as drivers of electric bicycle (E-bike). A nonlinear dynamics model based on Matlab/Simulink of E-bike and four regenerative braking strategies of SRM are presented in this paper, such as most feedback power control strategy, most feedback efficiency control, fixed torque control, fixed feedback current control. A hybrid control strategy of PWM mode and current chopping...
Consideration of the structure and the operation principle of Switched Reluctance Motor (SRM), it is possible to obtain super high speed drive. Therefore, a three-phase 6/2 SRM, the speed of which is 130,000 rpm, is adopted for super high speed drive. Based on the two-dimensional finite element method (FEM), the torque-angle characteristics of 6/2 SRM are analyzed and the motor structure is improved...
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