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In light of the research on and development of the experimental and teaching system for electric power engineering program, an open multifunctional experimental-teaching system is built with the theory and practice of all major professional courses combined for not only their auxiliary teaching experiments, but also the comprehensive application of and research on professional knowledge. Thus students...
In this paper, a new type of AC machine was proposed. There were two sets of windings with different pole numbers on the stator. It eliminates the brushes and slip rings. In this paper, the structure characteristic and working principle of electric brushless excitation synchronous machine were introduced. In view of the coupling capability between the two sets of stator windings of brushless electric...
The brushless doubly-fed machine is a novel AC speed regulation machine developed in recent years, its performance has the relationship with the transformation efficiency of rotor magnetic-field pole numbers. Optimizing the design of rotor structure is the fundamental way to increase the transformation efficiency. By analyzing the salient pole rotor's characteristics, a new analogous salient pole...
The high speed permanent magnet (PM) machine has been widely investigated since it has small size, high efficiency and power density. However, due to the high rotor speed and high frequency of the stator flux variation, the design of a high speed machine is quite different from designing a conventional machine. This paper will pay attention to the design of stator core and stator winding for a high...
A new structure of brushless DC (BLDC) motor with passive magnetic bearings is introduced in this paper. The magnetic suspension of the rotor is realized by using the proposed passive magnetic bearings and does not need to be controlled. The axial stability of the rotor can be obtained by the radial force of the passive magnetic bearings and by the instinctive behavior of the PM motor in axial alignment...
Power factor control technique of the doubly fed machine is studied theoretically and experimentally in this paper. The expression of power factor angle and control characteristic of power factor are derived based on the field orientation control theory of the doubly fed machine. The experimental system has been designed and built based on 8XC196MC single-chip-computer. The experiment and simulation...
A stator field orientation vector method of doubly fed machine is introduced in this paper, which has the advantages of simple and easy to be implemented. Adopting the proposed vector control method, the excitation flux and electromagnetic torque of the doubly fed machine can be decoupled and controlled individually. The machine torque can be easily controlled by the q-axis component of the rotor...
A new type of double-rotor induction machine (DRIM) with inner and outer rotors has the advantage of low leakage inductance and high operation performance. This paper introduces the structure and operation principle of the DRIM. A prototype machine has been designed and built. The magnetic field analysis by means of the MAGNETO software shows that the magnetic field distribution of the DRIM is reasonable...
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