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Techniques for ASIC implementation of vector control

机译:矢量控制的ASIC实现技术

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Harmonic-free vector control, in which both the phase and amplitude of a three-phase current are controlled digitally to within close limits, is a common requirement in many power conversion applications. These include the control of three-phase motors, and the conversion of electrical power from three-phase AC to DC, or the inverse, with low supply harmonic content. Vector control at a specified frequency relies upon the generation of accurate sine and cosine waves, computation of the in-phase and quadrature components of the input current, and then reconversion to the three-phase sinusoidally varying drive values. The authors discuss the options available for implementation of the reference sine generator as an ASIC cell, and show how an application specific processor can be designed to achieve the very high performance combined with small area necessary to deal with the current transformation. Both functions are integrated in a design using less than 25000 gate equivalents at 16-bit accuracy.
机译:无谐波矢量控制是许多功率转换应用中的常见要求,其中三相电流的相位和幅度都通过数字方式控制在接近的极限范围内。这些措施包括控制三相电动机,以及将电源从三相交流电转换为直流电或将其转换为低谐波的逆变器。在指定频率下的矢量控制依赖于精确的正弦和余弦波的生成,输入电流的同相和正交分量的计算,然后重新转换为三相正弦变化的驱动值。作者讨论了可将参考正弦发生器实现为ASIC单元的选项,并展示了如何设计专用处理器来实现非常高的性能以及处理当前转换所需的小面积。两种功能都集成在一个设计中,使用16位精度时的门等效数量少于25000。

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