scholarly journals Comparative Analysis of Multiplications Technique Conventional, Booth, Array Multiplier and Vedic Arithmetic Using VHDL

Author(s):  
Akash Kumar ◽  
Tarun Chaudhary ◽  
Vijay Kumar Ram

The multiplication operation is one of the often used operation in many computer and electronic devices. Low power utilization is one of the most essential attributes for meeting several challenges in many applications. In this paper different type of implementation of Booth multiplier has been studied. Multipliers has great importance in digital signal processing, so designing a high speed multiplier is the need the hour. Structures of 4X4 bits Urdhva Tiryagbhya, Nikhilam Sutra have been executed on Spartan 3 XC3S50-5-PQ-208.The determined calculation delay for 4X4 Urdhva Tiryagbhyam was 14.14 ns and force is 20.60 mw. For Nikhilam Sutra the determined computational postponement is 16.16 ns and all out force utilization is 24.60 mw.

Actuators ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 115
Author(s):  
Teemu Sillanpää ◽  
Alexander Smirnov ◽  
Pekko Jaatinen ◽  
Jouni Vuojolainen ◽  
Niko Nevaranta ◽  
...  

Non-contact rotor position sensors are an essential part of control systems in magnetically suspended high-speed drives. In typical active magnetic bearing (AMB) levitated high-speed machine applications, the displacement of the rotor in the mechanical air gap is measured with commercially available eddy current-based displacement sensors. The aim of this paper is to propose a robust and compact three-dimensional position sensor that can measure the rotor displacement of an AMB system in both the radial and axial directions. The paper presents a sensor design utilizing only a single unified sensor stator and a single shared rotor mounted target piece surface to achieve the measurement of all three measurement axes. The sensor uses an inductive measuring principle to sense the air gap between the sensor stator and rotor piece, which makes it robust to surface variations of the sensing target. Combined with the sensor design, a state of the art fully digital signal processing chain utilizing synchronous in-phase and quadrature demodulation is presented. The feasibility of the proposed sensor design is verified in a closed-loop control application utilizing a 350-kW, 15,000-r/min high-speed industrial induction machine with magnetic bearing suspension. The inductive sensor provides an alternative solution to commercial eddy current displacement sensors. It meets the application requirements and has a robust construction utilizing conventional electrical steel lamination stacks and copper winding.


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