In order to analyze the possibility of the fractional-slot concentrated-winding for wind generation, this paper states the merits of fractional-slot concentrated-winding permanent magnet machines, and then analyzes the electromagnetic design rules of fractional-slot concentrated-winding. The fractional-slot concentrated-winding permanent magnet machine is modeled and designed in electromagnetic, and its performance is analyzed, some conclusions can be obtained, which will provide reference for further analysis and application of fractional-slot concentrated-winding PM machine.
Electric vehicle (EV) is the greatest potential production of new energy vehicles. It plays a very important role in the area of energy conservation and reduction of pollutant emissions. In order to accelerate EV industrialization, the paper proposed a motor design method,which need to combine the automobile theory with the design permanent machine (PM). The paper considered the vehicle’s dynamic parameters, defined the motor’s basic parameters and designed the dimensions of electromagnetic structure, and then analyzed the field of the motor using finite element method (FEM). The paper firstly presents that drive motor’s design should consider two respects: one is the vehicle and another is the drive motor. In view of length of paper, only the no-load field analysis was proposed in this paper. The effectiveness of the proposed method is verified by the analysis results.
In order to obtain the low synchronous speed, fractional slot concentrated winding is adopted in generation system. This paper analyzed the pole/slot combination rule, and studied the electromagnetic design method. By the finite element software, the characteristics is analyzed for this fractional-slot concentrated-winding permanent magnet generator, the result shows that this generator has a good performance, thus yet proves that fractional slot concentrated winding scheme is feasible.
The key technology of variablespeed constantfrequency (VSCF) brushless doubly-fed generator (BDFG) was getting the maximum power under the variable wind speed by adjusting the rotor speed of the induction generator according. Wind turbine systems had many uncertain factors with strong nonlinear multivariable with and disturbances. Based on the prototype of wind electricity conversion system (WECS), a new maximum power point tracking control which is realized by self-adaptive controller strategy for variable speed constant frequency wind generation system has been developed in this paper. A experiment platform of a 8kW laboratory variable speed constant frequency wind generation system controlled by TMS320LF2812 and TMS320VC33 was developed. Experimental results show that the system can operate at the expected points in the wide range of wind velocities and realize the control of maximum power point tracking very well.
This paper puts forward the unique design, through the research by solar panels, battery, the converter and photovoltaic power generation system composed by switch electrical, and according to the characteristics of solar panels and batteries, the actual situation and the requirements of a stable system, the battery charging and discharging control, etc. Then this paper further researched control strategies of the two kinds of operating mode of electric power grid and battery from nets, designed a converter of rated power 50 kW used for light storage complementary power generation system and light storage complementary test platform. Using the test platform to do the storage battery charging and discharging experiments and away from the grid experiments, the final experiment results show that the hardware design and the control strategy in this paper are proposed correctness and effectiveness.
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