Search query: three phase rectifier motor

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abstract: Steadily decreasing prices and improved performance of semiconductor devices have raised expectations towards the development and large scale application of motor mounted static converters. In view of this, the design of a rectifier inverter type of frequency changer which requires very small reactive components is considered. Accordingly, rectifier and inverter PWM schemes which generate the minimum possible harmonic distortion are first discussed. By using a suitable analysis method, `optimum' design data are obtained for every major system component. Resulting reactive component values are shown to be considerably smaller than the ones required by typical rectifier inverter structures. Predicted key results are verified by computer simulation.
author_names: Phoivas D Ziogas

Young-Goo Kang

Victor R Stefanovic
title: Optimum System Design of a Three Phase Rectifier Inverter Type of Frequency Changer
venue: IEEE Transactions on Industry Applications
year: 1985

abstract: A new three phase rectifier/converter with low harmonic input currents and minimal DC voltage ripple is described. The device achieves continuous input line currents by injecting a triangular third harmonic current, derived from the DC link current, into the neutral point of a delta star transformer at the supply. It uses a conventional six pulse phase controlled converter, with an additional bridge of four devices in the DC link. The additional bridge also cancels much of the DC voltage ripple, allowing a much smaller DC link inductance to be used. A prototype 10 kW system, suitable for such applications as DC motor drives, load commutated inverters, exciters for AC generators, and low power DC links is described. Experimental results obtained from this system are compared with ideal theoretical predictions.
author_names: John T Boys

Brian Mitchell
title: Current forced neutral injection in a three phase rectifier/converter
year: 1999

abstract: PURPOSE: To suppress fluctuation in the rotating force and torque of a motor by regulating the magnitude of a Hall effect rectification signal thereby controlling the square sum of constant of all polyphase rectification signals. CONSTITUTION: A field sensor 14 generates an output voltage proportional to the field strength and a current being fed to a sensor and connected with a square sum correction means 16 and a polyphase motor coil 12. The square sum correction means 16 receives rectification signals from the field sensor 14 and generates the square sum thereof. Subsequently, the square sum correction means 16 generates a correction signal which is delivered to the field sensor 14. Purpose of the correction signal is to sustain the square sum of signals from the field sensor 14 constantly at a predetermined value. The correct signal from the field sensor 14 is modulated by a motor control signal 18 in order to drive a motor. Fluctuation in the rotating force and torque of the motor is suppressed significantly by a corrected rectification signal from the field sensor 14. COPYRIGHT: (C)1994,JPO
author_names: Daniel N Galburt

garubato danieru
title: Electric motor having reduced fluctuation of rotating force, three phase electric motor with sinusoidal rectifier, control method for three phase brushless electric motor having sinusoidal rectification signal, and control method for three phase brushless electric motor
year: 1993

author_names: M Sakui

Akio Yanase

Hiroshi Fujita
title: A method for calculating the characteristics of secondary excited induction motor with a three phase bridge rectifier in the rotor circuit
year: 1988

author_names: Masaaki Sakui

Akio Yanase

Hiroshi Fujita

Mitsuo Shioya
title: A Method for Calculating Characteristics of Secondary Excited Induction Motor with a Three Phase Bridge Rectifier in the Rotor Circuit
year: 1988

author_names: William Shepherd

L N Hulley

Darwin T W Liang
title: Power electronics and motor control: Three phase naturally commutated bridge circuit as a rectifier or inverter
year: 1996

abstract: The advent of the silicon controlled rectifier has permitted the design of a practical cycloconverter source of 3 phase electrical power which can be continuously controlled in frequency, from dc to approximately one half the input power frequency, as required to control the speed of a 3 phase induction motor. The correspondence between the applied stator frequency, the resulting magnetic flux phase rotation, and the mechanical rotor rotation in a 3 phase induction motor is analyzed as a function of slip. A closed loop feedback system is described for controlling the slip between the rotor and rotating magnetic flux and for optimizing the slip frequency over the full reversible speed range of the motor. The stepless control of angular position, velocity and acceleration, and torque in both the driving and braking modes of operation is discussed.
author_names: Walter Slabiak

Louis J Lawson
title: Precise Control of a Three Phase Squirrel Cage Induction Motor Using a Practical Cycloconverter
year: 1966

abstract: A single phase to three phase converter for a low cost AC motor drive is proposed. The converter employs only six switches and incorporates a front end half bridge active rectifier structure that provides the DC link with an active input current shaping feature, which results in sinusoidal input current at close to unity power factor. The front end rectifier in the converter permits bidirectional power flow and provides for excellent regulation against fluctuations in source voltage, facilitating regenerative braking of the AC motor drive. A control strategy that maintains a near unity power factor over the full operating range and is easy to implement is described. Suitable design guides for the selection of filter components are presented. Simulation and experimental results that verify the developed theoretical models are also presented.<ETX>
author_names: Prasad N Enjeti

Ashek Rahman
title: A new single phase to three phase converter with active input current shaping for low cost AC motor drives
venue: Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting
year: 1990

abstract: Modeling and control of a three phase PWM boost rectifier is presented. A current controller in rotating coordinates assures unity input power factor and fast output voltage regulation. Sensitivity of stability margins to different loads is analyzed. Two typical loads, a DC DC power converter and an inverter supplying an AC motor, are considered. Linear and nonlinear current controllers in the direct axis are compared. With the nonlinear controller, which employs load current feedforward, the rectifier sensitivity to load variations is greatly reduced and a single optimal output voltage compensator can be designed for all load conditions. Small signal output impedance is significantly improved, and faster transient response is obtained. The results are illustrated with simulations of a practical 10 kW rectifier.<ETX>
author_names: Silva Hiti

Dushan Boroyevich
title: Control of front end three phase boost rectifier
venue: Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition ASPEC'94
year: 1994

abstract: A low cost four quadrant single phase to three phase converter for AC drives is described. The technique uses a single phase reversible rectifier operating at unity power factor to produce a balanced DC supply at a controlled high voltage using two IGBT power transistors. Four additional IGBT power switches operate on this high voltage to produce two pulse width modulated (PWM) waveforms using a novel space vector modulation (SVM) strategy. A three phase motor load is then connected to the centre of the DC supply, and the two PWM voltages, to give a four quadrant reversing AC drive. The unique feature of this system is the modulation strategy, which achieves higher motor voltages than any previous published method while achieving excellent harmonic suppression at high efficiency in motor sizes restricted to the rating of the single phase supply (typically 2 kW)<ETX>
author_names: Grant Anthony Covic

G L Peters

John T Boys
title: An improved single phase to three phase converter for low cost AC motor drives
venue: Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95
year: 1995