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This paper presents a 2-D nonlinear time-harmonic finite element model of induction motor for use in the accurate dynamic simulation. In the proposed model, it is not necessary to rotate the rotor, the resistivity of the rotor material is modified in terms of the specified load condition. The nonlinear properties are represented by using the effective magnetization curve. The field-coupled circuit...
The paper proposes a single-phase full-bridge positive/negative pulse charger with energy regeneration and adjustable power factor. Based on a generalized zero vector technique, a novel charging system which combines a single-phase boost rectifier with a buck converter is presented. The system forms a novel single-stage converter of AC to DC, and such a converter has both energy regeneration and power...
This paper presents the analysis and design of the integral cycle converter (ICC) to be used as a local point of load converter in a high frequency distributed power system. In particular, a model for the ICC is developed to investigate the degree of distortion of the input current drawn from the bus, and to study the synthesized output voltage as a function of switching sequence. An intuitive method...
The auxiliary converter (AXC) has been presented as a cost-effective solution to retrofit the conventional diode rectifier into a unity-power-factor and regeneration-enabled front-end. However, the pulse width modulation (PWM) switching of the AXC often causes circulating current between the AXC and diode rectifier. The zero vectors of each PWM cycle induce zero sequence current, which results in...
A novel cost-effective and high-efficiency single-switch resonant inverter with power-factor-correction (PFC) scheme is proposed to drive a piezoelectric ceramic transducer (PCT) for an ultrasonic cleaner. The circuit topology is derived by integrating a flyback converter served as PFC stage with a class-E resonant inverter for driving a thin PCT at its resonance frequency. A unity power factor is...
This paper presents a PV inverter system formed by a DC-DC converter and a full-bridge DC-AC converter. The DC-DC converter combines the boost and flyback topologies to produce a semi-sinusoidal output current and to achieve the high step-up objective. A full-bridge DC-AC converter controlled with low-frequency switching techniques is then used to convert the current into sinusoidal form and to feed...
This paper deals with the input filter design of matrix converter. Regard the matrix converter as a buck type PWM rectifier in the input side, the transfer function of input current using LC input filter is deduced. The parameter selection approach for the capacitor and inductor is presented. It has been verified that when LC circuit is adopted in the input filter, the input current will oscillate...
In this paper, a new control strategy for a low cost series connected single phase PV module inverter is introduced that delivers full PV power (at MPPT) to the load together with voltage compensation. The inverter operates during the day time as an active power compensator as well as load voltage regulator under grid voltage sag, swell or even under normal condition. The compensating voltage provided...
New bridgeless single phase AC-DC power factor correction (PFC) rectifiers based on Sepic and Cuk topologies are proposed. The absence of an input diode bridge and the presence of only two semiconductor switches in the current flowing path during each switching cycle results in less conduction losses and improved thermal management compared to the conventional Sepic and Cuk PFC converters. The proposed...
This paper presents a two-stage, high-power-factor electronic ballast for high-intensity-discharging (HID) lamps. The presented ballast is composed of a boundary-conduction-mode (BCM)-operated buck-boost-flyback converter to achieve input current shaping, and a high-frequency (20 kHz) combined with low-frequency (200 Hz) square-wave-driven half-bridge-type inverter to supply the lamp with low-frequency...
A transformerless single-stage single-switch AC/DC converter was reported and analyzed recently. The converter features high power factor capability, high conversion efficiency, reduced voltage stress on bulk capacitor, low manufacturing cost and small in size. In this paper, its averaged small signal model is analyzed and presented for the control purpose. By applying small ac signal perturbations...
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