A switched reluctance motor control method limiting the maximum dc source current in the low-speed range

Bogusz, P.

doi:10.1515/bpasts-2016-0022

Cited by 6 publications

(10 citation statements)

References 16 publications

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“…sin nzα (7) where, L a is axial length of armature core, R 2 is outside diameter of airgap, R 1 is inside diameter of airgap, B r nz 2p and G n are Fourier coefficient when taking Fourier expansion for B r (θ) and…”

Section: Optimization Of Cogging Torquementioning

confidence: 99%

“…During the past decades, many kinds of bearingless motors were proposed and carried out, for example, bearingless switched reluctance motors [7,8], bearingless induction motors [9,10], bearingless permanent magnet synchronous motors (BPMSMs), etc. Due to small size, no contact, no wear, no lubrication, high efficiency, the BPMSMs are highly valued around the world, especially in semiconductor, pharmaceutical and medical industry [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Design and analysis of interior composite-rotor bearingless permanent magnet synchronous motors with two layer permanent magnets

Sun

Chen

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. In this paper, a new type of interior composite-rotor bearingless permanent magnet synchronous motors (BPMSMs) with two layer permanent magnets (PMs) is proposed. In order to reduce the torque ripple of this kind of motors, the sizes of PMs are optimized. Moreover, the magnetic field analysis of the interior composite-rotor BPMSM with two layer PMs is carried out by the finite element method (FEM). The corresponding static electronic magnetic characteristics at no load, including magnetic field, PM flux linkage and inductance, are studied in detail. In addition, electromagnetic torque characteristics and suspension force characteristics are also investigated thoroughly. The results of the analysis and simulation lay a significant foundation for further research on the interior composite-rotor BPMSMs with two layer PMs.Key words: bearingless motor, permanent magnet motor, finite element analysis, cogging torque, static electromagnetic characteristics.Design and analysis of interior composite-rotor bearingless permanent magnet synchronous motors with two layer permanent magnets In this paper, an interior composite-rotor BPMSM with two layer PMs is proposed. Then the electromagnetic characteristic of the proposed motor is analyzed by employing the finite element method (FEM) [20], which is used for the optimization of the motor. In Section 2, the suspension principle of proposed motor with two pole pairs of suspension windings and three pole pairs of suspension windings is introduced. In Section 3, the process of optimization based on the size of permanent magnets (PMs) is proposed, as well as the principle of optimization reducing the cogging torque and increasing the suspension force. In Section 4, the finite element model, plot mesh and prototype parameters are presented. Then the basic electromagnetic characteristics at no load including PM flux linkage, magnetic field and inductance of the proposed machine are analyzed. In Section 5, the electromagnetic characteristics are investigated. In Section 6, the suspension force characteristics are analyzed. Finally, Section 7 summarizes the paper. Suspension principleFor generating the suspension force and electromagnetic torque simultaneously, in the BPMSMs, the torque windings and suspension windings are wound together in the same stator slots. Suppose the pole pair number and current frequency of torque windings is P T and ω T . The pole pair number and current frequency of

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Section: Optimization Of Cogging Torquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and analysis of interior composite-rotor bearingless permanent magnet synchronous motors with two layer permanent magnets

Sun

Chen

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…The simulation model was realized based on Equations (1)-(4) and flux-current-angle and torquecurrent-angle characteristics which were calculated by means of FEM software. A detailed description of the simulation model was presented in [3]. Waveforms of currents, voltages and torque under the GCCC control and under the proposed GDCC control were registered.…”

Section: The Simulation Modelmentioning

confidence: 99%

“…In the last twenty years, the intensified research is also being conducted on the development of vehicles with an electric drive system due to the development of power electronics systems, control systems as well as the technology of electrochemical accumulators production [1][2][3]. When an electric motor is used in an electric drive vehicle, the efficiency of electric energy conversion into mechanical energy (during motoring operation) is just as important as conversion of mechanical energy into electric energy (during generating operation).…”

Section: Introductionmentioning

confidence: 99%

The novel control method of switched reluctance generator

Bogusz¹

2017

Archives of Electrical Engineering

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“…Another situation is in the case of a low speed range [11]. In such a case of operation, in many applications there is a need to introduce a special control algorithm [12,13], as well as the use of a sensorless control. It is assumed that position estimation based on the back electromotive force (EMF) does not have sufficient accuracy at lower speed range [14,15].…”

Section: Introductionmentioning

confidence: 99%

A new sensorless speed control structure for PMSM using reference model

Urbański¹

2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. In the paper a new sensorless control structure for the PMSM drive is presented. Such a structure is especially recommended for speed in the range of single revolutions per second (excluding standstill). The method uses a back EMF observer for position estimation. However, there is no need to estimate the speed. This is a big advantage because of possible irregularity of estimated back EMF in this speed range, which makes the calculation of speed difficult or impossible. The proposed structure is similar to the model following control, but the reference model attempts to track the motor operating point. The main idea is to utilize as a reference a model of the whole drive, including speed and current controllers and motor model. Such a model produces reference voltage for the real inverter. However, an extra unit -called rotator -is needed to provide precise control of direct axis current, which is sensitive to the improper position of the voltage vector. The rotator acts as a kind of compensator for error of position estimation. range. This is confirmed by experimentally obtained waveforms shown in Fig. 1 and Fig. 2. This is the idle speed, using a constant value of reference current on q axis. These waveforms were obtained for a traditional field oriented control (FOC) method of the PMSM (using a similar structure as is shown in Fig. 4), with a cascade control structure using a closed speed control loop (which was disconnected for the test) with inner current control loops containing separate controllers on d and q axes, rotating synchronously with the rotor. The overall structure of control utilizes the sine and cosine of the estimated position and calculated speed value instead of measured values.To obtain smooth output values from the observer, the reference voltage is used instead of measured ones. This simplification gives good results

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A switched reluctance motor control method limiting the maximum dc source current in the low-speed range

Cited by 6 publications

References 16 publications

Design and analysis of interior composite-rotor bearingless permanent magnet synchronous motors with two layer permanent magnets

Design and analysis of interior composite-rotor bearingless permanent magnet synchronous motors with two layer permanent magnets

The novel control method of switched reluctance generator

A new sensorless speed control structure for PMSM using reference model

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