The FSQ-series FPSTM (Fairchild Power Switch) is an integrated Pulse Width Modulation (PWM) controller and Sense FET specifically designed for quasi-resonant off-line Switch Mode Power Supplies (SMPS) with minimal external components. Figure 1 shows the internal block diagram of the FSQ-series. Compared with discrete MOSFET and PWM controller solution, it can reduce total cost, component count,...

This paper presents a novel three-phase utility frequency to high frequency soft switching power conversion circuit with dual mode pulse width modulation and pulse density modulation for high power induction heating applications as melting of steel and non ferrous metals, annealing of metals, surface hardening of steel and cast iron work pieces and hot water producers, steamers and super heated...

This paper aims to develop vector controlled permanent magnet linear synchronous motor (PMLSM) based on simplified space vector pulse width modulation. Mathematical models of PMLSM&SVPWM presented. The present PWM technique does not involve any sector identification and considerably reduces the computation time when compared to conventional space vector PWM technique. To validate the proposed a...

This paper proposes a new topology namely Improved Current Fed Switched Inverter which is derived from the current fed switched inverter. The new topology improves the value of modulation index from its previous topology where the value of modulation index was restricted. The system is suitable for the renewable applications since it draws continuous input current. Single stage high boost inver...

An improved single-ended push–pull (SEPP) halfbridge type zero-voltage soft-switching pulse width modulation (ZVS-PWM) DC–DC power converter is presented in this paper, which makes use of a saturable reactor-assisted lossless capacitor type zero voltage soft-switching method. The SEPP power converter with a high-frequency forward and flyback hybrid transformer link has some advantages such as l...

We propose a novel digital current control method for half-wave rectified brushless synchronous motors (HWRB-SM) with pulse width modulation (PWM) at fixed switching frequency. For HWRB-SMs, the field magnetic flux must be excited by high-frequency stator currents. Due to nonlinear dynamics of diode short-circuiting winding, an appropriate mathematical model is required controlling excitation c...

In this paper, hybrid dynamical systems theory is applied to the analysis and control of switched converters with Pulse-Width Modulated (PWM) inputs. The system described by a state-space model continuous flows discrete jumps, without averaged equations. modulation effects are captured in full using time-dependent signals, enlarging state vector include PWM waveform generation process. Furtherm...

This paper proposes a Flexible Power Electronic Transformer (FPET) for the application in the micro-grids. The low frequency transformer is usually used at the Point of Common Coupling (PCC) to connect the low voltage grid and utility network to each other. The conventional 50Hz transformer results in enhanced low voltage-grid power management system during grid-connected operation. In this pap...

A quasi-Z-source inverter with a novel carrier based pulse width modulation (PWM) scheme is proposed for photovoltaic power generation systems. In this new technique, a high frequency sine wave is employed as carrier waveform instead of the conventional triangular wave in the simple boost technique. This increasess the shoot-through duty cycle for the given modulation index and hence the voltag...

Renewable energy sources, especially solar photovoltaic systems (PV) are gaining popularity as the demand for electrical energy is increasing day by day. They can act as a voltage source feeding the power circuit. This work aims in utilising the PV system as a voltage source for a cascaded five level inverter. Further the performance of the PV panel fed cascaded multilevel inverter is analysed ...