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This paper presents the design and analysis of a novel machine family of Slotless Permanent Magnet Brushless DC motors (PMBLDC) for precise positioning applications of spacecrafts. Initial design, selection of major parameters and air gap magnetic flux density are estimated using the analytical model of the machine. The proportion of the Halbach array in the machine was optimized using FE to obtain...
This paper will describe how finite element analysis can be utilize to design and model the performance of rotary electrical machines. Special interest placed on the induction motor since the design is simple, and has greatest influence in operation of electrical power system. Transient AC analysis has been studied as it is necessary to examine the motor's performance dynamically. Opera 2D software...
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...
A novel V/F induction motor control system based on stator voltage oriented method is presented. This scheme includes dead time compensation, stator voltage compensation and anti-oscillation regulation, which can greatly improve the V/F systempsilas performance especially low frequency load capability and fast response capability. Different from conventional V/F methods, all the compensation and regulation...
The stator-doubly-fed doubly salient (SDFDS) motor for electric vehicles rotates with constant torque below basic speed, whereas with constant power by weakening flux over basic speed. The EMF of SDFDS motor can be controlled for the constant power control by the flux-weakening in theory as the controllable of flux. But the nonlinear characteristics of SDFDS motor cause the EMF to be anomalous square-wave...
Considering mandatory synchronization and torque coupling among motors with fixed joint, taking into account the influences of manufacturing errors, outside interference and electrical parameters drift on the inductive motor properties, this paper presents a novel multi-motor power balance control approach based on multi-DTC and online parameter identification. Speed control with torque balance of...
The 2-D transient field model of Interior permanent magnet generator (IPMG) which is driven by wind turbine is set up and analyzed by the software of Ansoft. As a result, with the size of top rake of magnetic pole changing, the variation of starting resistant moment is obtained. Consequently, theoretic reference for minimization of starting resistant moment of IPMG is offered.
There are applications where low current inrush and or high starting torque are specified for reducing disturbance on the electrical distribution network. There are also situations where it is required to successfully start large AC motors at reduced voltage conditions when only one substation transformer of a double-ended transformer is in service at petrochemical plants. The latter condition requires...
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