Comparison of Hybrid Excitation Synchronous Motor with Sinusoidal and Non-Sinusoidal Back-EMF
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Hybrid excited synchronous machines are getting used wider and have perspectives for being used in many spheres where there is a need in efficient machine with magnetic flux control ability, especially, while prices on permanent magnets are getting higher. Models of synchronous machines with hybrid excitation allows to simulate different operation modes itself and create more complex models including this type of machine. For accurate analysis of hybrid excitation synchronous motor and it`s drive control it is significant to have an accurate model. This paper deals with comparison of synchronous machine with hybrid excitation with non-sinusoidal and sinusoidal back-emf.Keywords:
Synchronous motor
Non-sinusoidal waveform
Machine control
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Synchronous motor
Machine control
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Abstract In this paper, the simulation analysis and research on the starting and generating system based on two-stage brushless synchronous motor and permanent magnet synchronous motor are respectively carried out, and the brushless synchronous motor AC/DC mixed excitation scheme is proposed. The starting operation adopts vector control, and the output voltage precision is improved by adjusting the excitation voltage of the exciter. A permanent magnet synchronous motor starting and generating system is constructed, and the control of starting and generating is realized by using vector control based on SVPWM, the results show that the permanent magnet synchronous motor has fast starting speed, good dynamic and static performance, high power supply quality and simple hardware composition, which reduces the complexity of the control system and is convenient for engineering implementation.
Exciter
Synchronous motor
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This paper proposes a control strategy for twelve-phase permanent magnet synchronous starter/generator (TP-PMSS/G), which has four sets of three-phase windings to improve the fault tolerance capability and the power density of the system. The mathematical model of the TP-PMSS/G is analyzed. Based on the model, a four d-q coordinates control strategy is proposed in this paper which allows the TP-PMSS/G to work in starting mode and generating mode respectively with low 2 nd and 4 th order harmonic current. Experimental results are carried out to validate the proposed control strategy.
Starter
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SFC (static frequency converter) system has been used as drive of large synchronous machine in many industry applications. But many papers have been presented on the control algorithm of SFC system, not the acceleration and start-up but the rated speed operation with line connection and the braking operation with regeneration which is used in the industry. This paper presents all control algorithms for the large synchronous machine connected with SFC system. The experimental results show that the proposed several algorithms are proper and effective
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This paper surveys the doubly-fed induction generator (DFIG) used in wind energy conversion systems (WECS). Most of the present day WECS is the variable speed type. The variable speed WECS generators are: synchronous generator (SG), permanent magnet synchronous generator (PMSG), wound rotor induction generator (WRIG) and DFIG. Of these, the DFIG is finding increasing attention in the use of WECS because of its requirement of partial rated converters and complete control of active and reactive power transferred.
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The general problem of continuous speed control of synchronous machines arising-out of the possibility of supplying these machines through a variable frequency static device is presented Considering the steady state, some control laws for machines with a single rotor winding are derived. These laws impose various operating conditions. Some problems connected with the application of these synchronous actuators in speed control systems are discussed.
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This paper deals with the new encoderless control of a 9 phase permanent magnet synchronous generator used for a direct drive 6MW wind turbine. The particularity of the machine is the 3 stars windings that increase the availability of the system. The machine is supplied by 3 Low Voltage (LV) converters, one for each star. The control system insures the torque and the flux control by the sensorless Field Oriented Control.
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This paper introduces a sensorless control method of position estimation for permanent magnet (PM) synchronous machines. The method, using rotating vector, carrier frequency excitation and heterodyning, tracking observers for position estimation is discussed. The experimental results for the case of a buried PM machine are shown in the paper. It has been demonstrated that this technique can operate over a wide speed range.
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Hybrid excited synchronous machines are getting used wider and have perspectives for being used in many spheres where there is a need in efficient machine with magnetic flux control ability, especially, while prices on permanent magnets are getting higher. Models of synchronous machines with hybrid excitation allows to simulate different operation modes itself and create more complex models including this type of machine. For accurate analysis of hybrid excitation synchronous motor and it`s drive control it is significant to have an accurate model. This paper deals with comparison of synchronous machine with hybrid excitation with non-sinusoidal and sinusoidal back-emf.
Synchronous motor
Non-sinusoidal waveform
Machine control
Cite
Citations (1)