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A novel soft-switching interleaved boost dc/dc converter is proposed in this paper. The proposed converter combines the conventional pulse-width-modulation technique, soft commutation technique to promote the circuit performance. The proposed converter uses two boost dc/dc converters with interleaved operation to increase the output power and reduce the input ripple current and output ripple voltage...
This paper proposes a dc power supply system to give high power factor and low current distortion on the rectifier side and provide stable dc voltage on the isolated dc/dc converter side. The proposed dc power supply system uses a new ZCS strategy to get ZCS function. Besides operating at constant frequency, all semiconductor devices operate at ZCS without additional current stress. A significant...
A ZCS-PWM interleaved boost rectifier with high power factor is proposed in this paper. The pulse-width-modulation technique and soft commutation technique are used in the proposed rectifier to promote the circuit performance. The proposed circuit includes two boost converter which are operated at interleaved mode to increase the output power and reduce the input ripple current. A ZCS-PWM auxiliary...
To investigate the input impedance of digital-controlled bi-directional DC/DC converters, this paper develops a modeling method based on the sampled-data approach. Because the nonlinear pulse-width modulator generates sideband components, the sideband effect occurs in a closed-loop converter. And the sampling process of a digital controlled system can significantly influence the sideband components...
This paper analyses and designs a ZCS-PWM single-phase high power factor interleaved boost rectifier. The proposed rectifier combines the conventional pulse-width-modulation technique and soft commutation technique to promote the circuit performance. The proposed rectifier uses two boost rectifiers with interleaved operation to increase the output power and reduce the output ripple current and input...
A zero-current transition (ZCT) pulse-width-modulation (PWM) interleaved boost dc/dc converter using a ZCT-PWM auxiliary circuit is presented in this paper. All semiconductor devices in the proposed interleaved boost converter operate at ZCS turn on and turn off. Besides operating at constant frequency and reducing commutation losses, the proposed converter has no additional current and voltage stress,...
A zero-current-switching (ZCS) pulse-width-modulation (PWM) interleaved boost dc/dc converter using a ZCS-PWM auxiliary circuit is presented in this paper. All semiconductor devices in the proposed interleaved boost converter operate at ZCS turn on and turn off. Besides operating at constant frequency and reducing commutation losses, the proposed converter has no additional current and voltage stress,...
A novel zero-voltage-switching pulse-width-modulation (ZVS-PWM) interleaved boost dc/dc converter is proposed in this paper. The proposed converter combines the conventional pulse-width-modulation technique, soft commutation technique to promote the circuit performance. The proposed converter uses two boost dc/dc converters with interleaved operation to increase the output power and reduce the input...
The zero-vector configurations have great influence on the performance of the practical implemented space vector modulated AC-DC matrix converter (MC). In this paper, the optimized switching pattern that reduces the output inductor current ripple and the narrow pulses is presented. The optimal zero-vector duty cycles for different switching patterns are derived based on the output inductor current...
A zero-voltage-switching pulse-width-modulation (ZVS-PWM) interleaved transformer-isolated boost dc/dc converter with a simple ZVS-PWM auxiliary circuit is proposed in this paper. The proposed interleaved transformer-isolated boost dc/dc converter can provide a high step-up voltage ratio with a simple and compact configuration. And, the proposed converter uses a simple ZVS-PWM auxiliary circuit to...
An inductor-capacitor (LC) filter is normally required at the input of the matrix converter, to assist in the commutation of switching devices and to mitigate input current harmonics. However, its presence, in turn, often results in degradation of dynamic performance and instability of the system. This paper gives a simple procedure to select the input filter parameters for the matrix converter and...
This paper presents a battery management system of LiFePO4 battery module with dual-balancing mechanism. First, the employed battery management can accurately capture some important parameters of the LiFePO4 battery module, including voltage, current, temperature, and providing protection functions for the battery module. Next, these obtained parameters of the battery are transmitted to the microcontroller...
A new zero-voltage-switching (ZVS) pulsewidth-modulated (PWM) bidirectional DC/DC converter for battery charger using the Reflex™ method with high efficiency and low stress is presented in this paper. The proposed bidirectional DC/DC converter uses a new ZVS-PWM auxiliary commutation circuit to provide soft-switching function on all switches. Except for the auxiliary switches, all active and passive...
This paper presents a battery charger for LiFePO4 battery pack based on a series-resonant topology. The synchronous rectification technique is incorporated into the proposed system to improve the charging performance. Moreover, the frequency domain analysis and the equivalent circuit of each operation mode are descried and conducted. The frequency characteristics of the proposed system are also detailed...
This paper presents a bi-directional converter applied in electric bike. The main structure is a cascade buck-boost converter, which transfers the energy stored in battery for driving motor, and can recycle the energy resulted from the back electromotive force (BEMF) to charge battery by changing the operation mode. Moreover, the proposed converter can also serve as a charger by connecting with AC...
Sewage sludge taken from Guilin Wastewater Treatment Plant (WWTP) and elemental sufur(S0) were used as the bioleaching medium and substrate respectively. Acidification effect of sewage sludge, activity of bioleaching microorganism and removal rate of heavy metals were investigated at various temperatures from 10°C to 40°C in the bioleaching process. Where Bioleaching experiments were process was operated...
This paper proposed a zero-current-switching pulsewidth-modulation (ZCS-PWM) forward dc/dc converter using a simple ZCS-PWM auxiliary circuit. The main switch and auxiliary switch operate at zero-current-switching turn on and turn off, and the all passive semiconductor devices in the proposed converter operate at zero-voltage-switching (ZVS) turn on and turn off. Besides operating at constant frequency...
This paper proposes a high performance single-stage transformer isolated AC/DC converter to give high input power factor and low current distortion on the input side and provide stable and low ripple dc voltage on the output side. The proposed AC/DC converter only employs four switches to perform the power factor correction in input side and provide regulation of the output dc voltage magnitude. Thus,...
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