2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289)
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A 1/spl phi/3W grid-connection PV power inverter with partial active power filter
Tập 3 - Trang 1512-1517 vol.3
This paper presents a single-phase three-wire (1/spl phi/3W) grid-connection photovoltaic (PV) power inverter with a feature of a partial active power filter (PAPF), which can not only deal with PV power but can filter current harmonics and improve power factor. Once the processed power exceeds the switch ratings, the inverter can reduce its output reactive power and harmonic power, while still ca......
#Inverters #Active filters #Power harmonic filters #Reactive power #Power system harmonics #Switches #Power generation #Photovoltaic systems #Solar power generation #Phase detection
Power integrated circuit drives based on HV NMOS
Tập 4 - Trang 1737-1740 vol.4
This paper presents high voltage (HV) NMOS based level shifters, bootstraps and charge pumps in direct and cascaded topologies, which are highly useful to implement either power integrated circuits (PICs) high-side transistor floating drives or compact inductorless DC-DC power supplies. Monolithic solutions resorting to a unique HV NMOS switching cell are very important when standard CMOS technolo......
#Power integrated circuits #MOS devices #Voltage #CMOS technology #Charge pumps #Integrated circuit technology #Costs #Circuit topology #Power supplies #Geometry
An instructional laboratory for the revival of electric machines and drives courses
Tập 2 - Trang 455-460 vol.2
This paper describes the developments at the University of Minnesota of new approach in teaching of electric drives, focusing on the associate state-of-the-art laboratory. The mission of these developments is to nationally revitalize courses in industrially and strategically vital fields of electric drives (and power electronics). This is accomplished by making these courses appealing to students ......
#Laboratories #Electric machines #Power electronics #Drives #Continuing education #Digital control #Hardware #Electronics industry #Electric motors #Voltage
Industrial implementation of a controlled sensorless synchronous drive with hard start conditions
Tập 3 - Trang 1167-1171 vol.3
The subject of this paper is a synchronous drive of grinding ball mills 4 MW, 150 rpm, 6 kV, 50 Hz on the base of PWM CSI. The system is installed at the concentrating plant of Norilsknickel in Russia. Specific to this drive is large stalling torque-up to 125% of rated torque. This is a sensorless drive. Another specific feature is the necessity of synchronization with power system and switching t......
#Industrial control #Sensorless control #Torque #Power system simulation #Pulse width modulation #Synchronous motors #Milling machines #Frequency #Voltage #Automatic control
Problems of paralleling windings for planar transformers and solutions
Tập 2 - Trang 597-601 vol.2
In today's power converters, paralleling windings in planar transformers is common, especially for low voltage and high current applications. Although this practice is usually believed to be an effective way to increase the current handling capacity of the windings, the effect might not be so significant due to the unequal current distribution within parallel layers if the layers are not properly ......
#Transformers #Copper #Current distribution #Frequency #Inductance #Power electronics #Low voltage #Solids #Wire #Assembly
Development of a bi-directional DC/DC converter for inverter/charger applications with consideration paid to large signal operation and quasi-linear digital control
Tập 2 - Trang 961-966 vol.2
In this paper, a low-power bidirectional DC/DC converter for inverter battery charger applications is considered. Initially, a galvanically isolated and synchronously rectified DC/DC converter topology is prototyped and its stationary performance evaluated. Next, a nonlinear dynamic model of the converter is derived using a state space averaging method. The dynamic model is nonlinear in the sense ......
#Bidirectional control #DC-DC power converters #Inverters #Digital control #Programmable control #Adaptive control #Batteries #Galvanizing #Topology #Prototypes
An analysis of a resonant half bridge dual converter operating in continuous and discontinuous modes
Tập 3 - Trang 1313-1318 vol.3
A half bridge dual converter has been previously shown to have operational advantages in low input voltage applications as frequently found in photovoltaic systems. This paper introduces a resonant version of this converter and analyses its operation in a range of continuous and discontinuous resonance modes. The new topology makes use of the transformer leakage inductance and the switching device......
#Resonance #Bridge circuits #Photovoltaic systems #Capacitance #DC-DC power converters #Low voltage #Topology #Inductance #Rectifiers #Diodes
Analysis of the effects of nonidealities of power components and mains voltage unbalance on the operating behavior of a three-phase/switch buck-type unity power factor PWM rectifier
Tập 4 - Trang 1607-1612 vol.4
According to the experimental analysis of a 5 kW wide input voltage range three-phase three-switch buck-derived unity power factor PWM rectifier, the ideally constant DC output current does show a low-frequency distortion for open-loop control operation which is translated into low-frequency harmonics of the mains current. This distortion cannot be eliminated completely by closed-loop control sinc......
#Open loop systems #Pulse width modulation #Harmonic analysis #Reactive power #Rectifiers #Harmonic distortion #Voltage control #Power system harmonics #Power harmonic filters #Bandwidth
Comparative study of flex-foil technology in HF planar transformer windings
Tập 3 - Trang 1248-1253 vol.3
The goal of this paper is to show and quantify the advantages and drawbacks of flex foil technology and its application field in manufacturing flat HF transformers. A comparison between three different winding technologies (wires, PCB type and flex-foil) based both on experimental and simulation results is presented. Three multiwinding transformers have been built and tested for the same power sta......
#Hafnium #Windings #Magnetic materials #Conducting materials #Manufacturing #Wires #Testing #Costs #Flexible electronics #Frequency
A novel IGBT inverter module for low-power drive applications
Tập 2 - Trang 642-647 vol.2
This paper presents a novel three-phase IGBT module called the SPM (Smart Power Module). This is a new design developed to provide a very compact, low cost, high performance and reliable motor drive system. Several distinct design concepts were used to achieve the highly integrated functionality in a new cost-effective small package. An overall description to the SPM is given and actual applicatio......
#Insulated gate bipolar transistors #Inverters #Scanning probe microscopy #Multichip modules #Costs #Integrated circuit reliability #Power system reliability #Motor drives #Packaging #Electric variables