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The conventional one cycle control cannot realize the function of eliminating harmonic component in the output voltage waveform of a cascaded multilevel inverter. To overcome these problems, this paper proposes a modified one cycle control(OCC) scheme based on a sample time staggered technique. Through the stagger of the sample time in the control system of cascaded units, the output voltage waveform...
The acceleration grid power supply (AGPS) is an important part of neutral beam injector (NBI) system. With the increasing of the NBI power, the requirement for output voltage of the AGPS is becoming higher and higher, even reaching to 1000 kV. As the Inverter type high voltage power supply uses the inverters located at lower voltage side to regulate and cut off the output voltage, it's very suitable...
This paper presents a power convertor design of a 60kW three-phase asymmetry half-bridge power convertor for switched reluctance machines (SRM). With established topology, voltage overshoot is sufficiently analyzed theoretically. To minimize voltage overshoot, this paper optimized the structure of main circuits, snubber capacitors and drive circuits. When dealing with main circuits structure, a low...
In this paper, a PWM control strategy of SRM is briefly introduced at first, and then there follows the analysis of ideal flux model by that strategy. An excellent and reliable driver circuit is strongly needed to maintain a normal operation of SRM, and IR2110 is a good choice to ensure accurate switching operation of power electronic devices. A new form of peripheral circuit of IR2110 is suggested...
In this paper, a switched reluctance generator (SRG) system is established for wind power generation. The designed system includes: an asymmetric half-bridge power convertor, a 12/8 three-phase SRG and control circuits which is dominated by digital controller dsPIC30F6010A. With optimized control parameters, the system achieve good dynamic and static performance with power feedback control. Then,...
The structure of switched reluctance motor for the hybrid vehicles is shown firstly in this paper. Basing on the mechanical characteristics and the electrical characteristics, in order to optimize the drive system efficiency, reduce the noise and torque ripple, upgrade the capability of output, three different control strategies are proposed in the paper. Current chopping control, voltage chopping...
This paper briefly mentions the micro controller unit, and then goes into details about the exact regulations for SRM. Firstly, it proposes the main driving state control for motor and the importance of the motor position sensor. For different speed, the controller will choice various styles such as voltage chopper control, angle position control and current chopper control for which owns its advantages...
We present a detailed treatment of Crossbar Switching Networks (R-CSNs) made of resistive elements for memory utilization (as look-up table) in a nano FPGA. Initially, a technology assessment of this technology compared with a VLSI CMOS based memory is pursued considering area and support circuitry. Then, a graph model is utilized for characterizing the effects of a single fault on the fault tolerant...
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