R. Dhanabal ¹, Sarat Kumar Sahoo ¹

Affiliations
1 Department of Micro and Nano Electronics, VIT University, Vellore - 632014, Tamil Nadu, IN

Abstract

Objectives: To design a 32-bit IEEE 754 floating point standard based MAC unit using 15 nm FinFET. In MAC unit given data is multiplied and accumulated in a register which are processed separately as exponent and mantissa but there are some issues regarding area power and timing, compromising these constraints is bit difficult. Methods: The proposed architecture of floating point MAC unit is majorly divided into multiplier and accumulator components in these blocks the sub blocks are designed with Han-Carlson adder, Vedic multiplier, barrel shifter and comparator. Findings: The previous work was done in Hardware Description Language (HDL) in which the design will map to CMOS or pass transistor components after synthesis so designing of each component with transistors of 15 nm FINFET becomes vital. The entire design is carried out in cadence virtuoso and layout editor for timing, area and power. The performance can be increased if the computations are performed with less number of transistors. However, the decimal operations have been limited due to the increase in cost and complexity of hardware components. DFP arithmetic is used for the complex computations, it consumes more power because of the area it occupied when implemented in hardware. Improvements/Applications: Because of battery driven property low power with high performance are given major importance.

Keywords

Barrel Shifter and Comparator, Han-Carlson Adder, Leading One Detector, MAC Unit (Multiplication and Accumulation Unit), Vedic Multiplier.

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Sarat Kumar Sahoo ¹, Dhaval Patel ¹, M. Balamurugan ¹, Ashwin Kumar Sahoo ²

Affiliations
1 School of Electrical Engineering, VIT University, Vellore - 632014, Tamil Nadu, IN
2 Department of EEE, SSN College of Engineering, Chennai - 603110, Tamil Nadu, IN

Abstract

Objectives This paper proposes a control methodology of bidirectional Converter for grid connected systems. Methods/ Statistical Analysis: The bidirectional converter is used for converting the DC-AC power by using decoupled current control strategy in stationary reference frame. The simulations of the proposed system are carried out in PSIM software. An experimental prototype of Bidirectional converter has been built in the laboratory. A TMS320F28335 digital signal processor (DSP) is used for generating the control pulses for the Converter. Findings: The control of grid converter along with battery backup would provide support to the grid. Thus the proposed control strategy could independently control active and reactive power and also able to avoid grid failures. Application/Improvements: Reduction of operating switching frequency, improved dynamics as well as robustness against grid impedance variation are some of the improvements of proposed system.

Keywords

Battery, Bidirectional Converter, DSP, Grid, PSIM.

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