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For creating welding joints in reactive metals such as in aluminum or magnesium using tungsten inert gas (AC-TIG) welding method the alternating current (AC) is passed from the electrode to work piece. Creation of proper and reliable and desirable rectangular shape AC current waveform across the arc gap causes large voltage stress (during transition) across all secondary side components of the equipment...
In this paper, a comparative performance of a newly proposed standalone solar PV (Photo-Voltaic) power generating system is presented along with a conventional PV generating system. The new PV generating system is using isolated dc-dc Cuk converter which consists of a high frequency transformer and a conventional PV system consists of a line frequency transformer. Both these configurations are compared...
In this paper, we present measurement results from a prototype chip (fabricated in 130 nm CMOS technology), designed to extract maximum power from a Thermoelectric Generator (TEG). From analytical expression, we prove that the maximum extracted power is around 75% of the available power in a TEG, without using a closed loop maximum peak power tracking to regulate the input voltage. In our measurements,...
Reconfigurable technology plays a critical role in the development of Next-generation wireless communication systems. OFDM is wireless communication technique in which digital data is encoded in large number of closely spaced orthogonal sub-carrier signals. The paper discusses the Baseband FPGA implementation of an OFDM transmitter. The module is implemented using a technique called partial reconfiguration...
In the developing demand for the vacuum interrupter in the medium voltage sector & to meet the quality requirements of the VI at the application end it is being very important to measure the leak rate of VI between the first & second measurements before dispatch to assess the VI healthiness. VIs are being introduced into switching products operating at transmission voltages and are finding...
This paper presents the hardware implementation of 12/24V closed loop boost converter using dSPACE 1104 controller board for lamp load. The proposed system consists of 12V battery, closed loop boost converter and 24V lamp load. The closed loop boost converter is used to boost the 12V input DC voltage to 24V DC output. To regulate the output of the converter, feedback voltage is given to dSPACE controller...
The role of FPGAs in software defined Radios (SDR) and Cognitive radios (CR) are very significant. These radios have to load different waveform depending on their requirements which may use different source coding, channel coding and modulation schemes. The user has to load large bit files even for small changes in the waveforms. In SDRs and CRs the configuration time and current consumption plays...
In this paper, a configuration with modified single-phase H-bridge AC-DC converter for DC ripple compensation and power decoupling with a DC-DC converter for bidirectional power flow between PHEV (Plug in Hybrid Electric Vehicle) and power grid is proposed. It is well known that single-phase PWM voltage source converter (VSC) suffers from second-order ripple power and subsequent DC-link voltage pulsation...
The role of FPGAs in software defined Radios (SDR) and Cognitive radios (CR) are very significant. These radios have to load different waveform depending on their requirements which may use different source coding, channel coding and modulation schemes. The user has to load large bit files even for small changes in the waveforms. In SDRs and CRs the configuration time and power consumption plays significant...
In this paper, a configuration of a single-phase bidirectional AC-DC converter and bidirectional DC-DC converter is proposed to transfer electrical power from the grid to an electrical vehicle (EV) and from an EV to the grid while keeping improved power factor of the grid. In first stage, a 230 V 50 Hz AC supply is converted in to 380V dc using a single-phase bidirectional AC-DC converter and in the...
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