The DS1875 features a pulse-width modulation (PWM) controller that can be used to control a DC-DC converter. The DC-DC converter can then be used to generate the high bias voltages necessary for avalanche photodiodes (APDs). This application note describes the operation of a boost converter that uses the DS1875. Discussion covers the selection of the inductor and switching frequency, and the se...

In a wind power generator using doubly fed induction generator (DFIG), the three-phase pulse width modulation (PWM) voltage source converter (VSC) is used as grid side converter (GSC) and rotor side converter (RSC). The standard linear control laws proposed for GSC provides not only instablity against comparatively large-signal disturbances, but also the problem of stability due to uncertainty ...

The sinewave generators based the switched-capacitor (SC) technologies are implemented in transistor level. This analogue sinewave generator consists of two parts: an approximate sinewave generator and a filter. The structure of this generator is robust and easily-controlled, in which an approximate sinewave is firstly generated based on SC circuits and then filter the harmonics. The main advan...

This paper proposes to work on power flow system for a wind turbine comprising a grid connected through Permanent Magnet Synchronous Generator and a power converter where it is employed as the bridge between the generator and the grid for megawatt power generation. At this power level, current source converter (CSC) topology possess favourable features such as simple structure grid friendly wav...

Direct drive wind turbine generators are gaining importance for light weight, compact design in wind power generation. A new design approach of superconducting wind generator having both axial and radial air gaps between stator and superconducting rotor winding is selected for this simulation work. This paper deals with the simulation of magnetic flux distribution in stator and rotor coil of th...

An electro-conjugate fluid (ECF) is a kind of functional fluid, which produces a jet flow (ECF jet) when subjected to high DC voltage. This study introduces the ECF jet to develop a novel inchworm like in-pipe mobile robot which mainly consists of two clamping units (a clamping actuator, an ECF jet generator and an ECF tank) and a propelling unit (a propelling actuator, an ECF jet generator and...

This paper presents a monolithic GaN driver with deadtime generator (DTG) for half-bridge DC-DC buck converters. The proposed integrated circuits (ICs) were fabricated in 3 µm enhancement-mode MIS-HEMTs process. DTG converter can operate at 250°C large gate swing of 10 V, and it exhibits maximum efficiency 80% high temperatures, VIN= 30 V 100 kHz. requires one control signal generates fewer tha...

The doubly fed induction machine (DFIM)-based DC voltage generator is equipped with a stator-connected diode rectifier. six-pulse rectifier as nonlinear circuit introduces harmonics in the stator and rotor current distorts voltage, well flux. This causes electromagnetic torque oscillations instantaneous power components oscillations. adversely impact mechanical parts of drive-train p component ...

This paper presents a 12 V mechanical torque converting belt-driven integrated starter and generator (BSG) system without DC-DC converter. A micro hybrid electric vehicle (micro HEV) typically uses battery with 12/48 bidirectional converter to satisfy its high starting wide operating speed for generating the required power. In contrast, proposed BSG consists of wound field synchronous machine (...