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In this paper, a new control strategy of stator-flux orientation for flux-switching permanent magnet (FSPM) motor based on voltage space-vector is proposed. The fundamental relationship and equalization between the two magnetic fields where the magnets are in the stator and rotor, respectively, are analyzed. The space-vector pulse-width modulation technique is applied to the FSPM motor drive in which...
This paper mainly discusses several key technologies in high performance BLDCM. A brief summarization on present studies in the field of aviation and aerospace for the enhancement of reliability, efficiency and variable speed capability is given, and its research direction in the future also is looked ahead.
Flux-switching permanent magnet (FSPM) motor is a new brushless machine with magnets in the stator, offering the advantages of robust rotor structure, high power density and high efficiency. In this paper, a transient co-simulation method of coupled magnetic and electric circuit solvers is adopted for performance analysis of a FSPM motor drive. The magnetic circuit and the electric circuit are coupled...
One position controlling source using sinusoidal wave by CPLD through linear amplifier technique for driving ring-type traveling-wave ultrasonic motor with 30 mm diameter of the stator (RTWUSM30) has been proposed and designed in this paper. The driving and controlling signals can be adjusted the frequency, the phase, the amplitude, and the phase difference of the two sin wave exciting signals through...
In this paper, two emerging outer-rotor stator-permanent-magnet (PM) brushless motor drives, namely the doubly-salient PM motor drive and the PM hybrid brushless motor drive, are firstly quantitatively compared, which are particularly attractive for serving as in-wheel motor drives for electric vehicles. In order to enable a fair comparison, these two motor drives are designed with the same peripheral...
Rotary eccentric loads often lead to vibration problems in motors, which may reduced their reliability and operating life. In order to reduce the radial vibration in permanent magnet motors, a real time detection method for rotary eccentric load based on the theoretical analysis of the motor vibration and the mechanical analysis was given, and a novel control strategy based on FOC (field oriented...
This paper proposes a novel line-to-line back EMF detection method for sensorless brushless DC (BLDC) motor drives. The actual phase back EMF signal can be indirectly obtained from the line-to-line back EMF. F function constructed based on line-to-line back EMF is calculated for commutation estimation. Compared to the traditional back EMF method, this scheme is simple to implement without the need...
Today's premium efficiency motors for the North American market are the result of focused efforts over the last decade. The advantages of using premium efficiency motors have been discussed and well documented. The United States Energy Policy Act of 1992 (EPAct) legislation and the Canadian Energy Efficiency Act, along with the implementation of NEMA Premiumreg efficiency levels in North America,...
This paper reports a study of the electromechanical principles involved in a variable capacitance micro-motor (VCM). It examines the principle of energy conversion for the machine. It also explores the electrostatic force analysis using coenergy method and Maxwell stress tensor method which can be used to estimate force densities in the air gap. A multi-level inverter has been designed and simulated...
A new transverse flux permanent magnet motor (TFPM) with combined stator and concentrating flux rotor configurations is introduced in this paper. Both the complexity of manufacture and the cost of machine are dramatically reduced by this unique design. Three-dimensional magnetic network as the derivation of equivalent magnetic computation model is used to get more accurate results. The impacts of...
Bearingless permanent magnet slice motors have a wide range of applications in the area of special electric drives. In this paper, a 3-phase permanent magnet slice motor with the power around 4 kW is set up, and a system of bearingless permanent magnet slice motor is introduced. Theoretical formulas of driving system and radial suspension forces are given, and then the control system for the 3-phase...
The paper considers the optimal design of an open slot, external rotor torque motor. Combinations of pole and slot numbers are presented for which the winding factor is maximal and torque ripple is minimal. A detailed optimisation of the magnetic circuit design of the six most promising pole-slot configurations has been undertaken using the combination of a genetic algorithm (GA) and a parametric...
Active magnetic bearing is a promising candidate for next generation spindle motors of hard disk drives. In this paper, an iterative learning control scheme is proposed to suppress the rotor poison runout induced by the unbalanced forces in AMB. The ILC controller can produce the synchronous compensation force by iteratively "learning" rotor runout information. This compensation force makes...
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