2 edition of Minimisation of inverter-fed induction-motor losses by optimisation of PWM voltage waveforms found in the catalog.
Minimisation of inverter-fed induction-motor losses by optimisation of PWM voltage waveforms
A. F. Mergen
Written in English
Thesis(Ph.D.) - Loughborough University of Technology 1977.
|Statement||by A.F. Mergen.|
4. 3D SVPWM 4-leg inverter-fed induction motor-based electric vehicle fault-tolerant control In order to evaluate the proposed fault-tolerant control strategy performances, simulations have been carried-out on an electric vehicle using a kW induction motor based powertrain (Fig. 2). frequency PWM waveforms to be reflected back in the direction from which they came. When these collide the leading edge waveforms add together causing voltage ringup which has also been termed: voltage overshoot. On a VAC system it is common to find voltage spikes of – volts or more at the motor terminals.
As the switching frequency three level inverter fed induction motor drive five level inverter fed induction motor drive is increased THD is reduced. The total switching losses are calculated as discussed in section 3, and tabulated in table1 for the different . Voltage-source Inverter-driven Induction Motor. A three-phase variable frequency inverter supplying an induction motor is shown in Figure. The power devices are assumed to be ideal switches. There are two major types of switching schemes for the inverters, namely, square wave switching and PWM switching. Square wave inverters.
Fault analysis of current-controlled PWM-inverter fed induction-motor drives. In: Properties and Applications of Dielectric Materials, Proceedings of the 7th International Conference on, vol. 3, pp. – that voltage overshoots do not exceed the upper limit at the motor terminals. Medium-voltage inverter-duty motors with a base rating that exceeds V must be able to withstand a peak voltage equal to times the motor’s rated line-to-line voltage. Rise times must equal or exceed 1 microsecond.
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The induction motor, when under PWM voltage coming from the inverter, is subjected to voltage harmonics (frequency components above the fundamental frequency). Depending on the type of PWM employed, the switching frequency and other peculiarities of the control, the motor may present efficiency decrease and losses, temperature, noise and.
Minimisation of inverter-fed induction-motor losses by optimisation of PWM voltage waveforms. By Ahmet F. Mergen. Download PDF (10 MB) Abstract. A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough thesis describes a method of minimising the total losses of Author: Ahmet F.
Mergen. This thesis describes a method of minimising the total losses of an inverter-fed 3-phase squirrel-cage induction motor when the motor,is subjected to a pulse-width modulated (PWM) voltage waveform.
The inverter is supplied from a d.c. link and operates at variable frequency to Cited by: 1. The pulse width modulation (PWM) inverter is widely used when voltage-frequency regulation is required. When laminated cores are energised by PWM voltage supplies additional losses occur due.
The method requires the separation of the iron losses in the hysteresis and eddy current components with sinusoidal supply, plus the average rectified and RMS values of the applied PWM voltage.
The proposed method has been proved on an induction motor prototype able to provide a good accuracy in the iron losses by: 5.
Advanced bus-clamping pulse width modulation (ABCPWM) techniques are advantageous in terms of line current distortion and inverter switching loss in voltage source inverter-fed applications.
Starting from the iron losses measured with sinusoidal supply and the PWM waveform characteristics, a fast and reliable prediction of the iron losses in the motor with the new voltage supply can be obtained. The proposed method has been proved on an induction motor prototype capable of providing good accuracy in iron loss measurement.
Present day drive types are the Induction motor drives with voltage source inverters. Also the voltage waveforms of tradition al two level inverter fed Induction motor shows that the voltage across the motor contains not only the requir ed ³fundamental ´ sinusoidal components, but also.
Technical guide – Induction motors fed by PWM frequency inverters 5 For an induction motor, rotor speed, frequency of the voltage source, number of poles and slip are interrelated according to the following equation: where: n: mechanical speed (rpm) ƒ 1: fundamental frequency of the input voltage (Hz) p: number of poles s: slip.
The present work has suggested boost converter for inverter fed induction motor drive system to tackle the low input voltage problem. A 1KW inverter fed induction motor system is fabricated and tested.
The experimental results coincide with the simulation results. References  J. Steinke and M. Buschmann, “Robust and reliable medium. voltage source inverter fed induction motor The circuit model of three phase rectifier with boost converter and three-phase inverter system is shown in Figure 3.
The output is connected to the three phase stator of star connected induction motor. Optimal PWM for minimization of current harmonic distortion in three-level inverter fed induction motor drives Conference Paper December with 50 Reads How we measure 'reads'.
Application considerations for PWM inverter-fed low-voltage induction motors Abstract: PWM inverter-fed induction motor drives are being used in greater numbers throughout a wide variety of industrial and commercial applications.
PWM inverters provide many benefits to their users including improved control of processes, reduced energy. Among the many loss minimization algorithms (LMA) for an induction motor, a loss-model-based approach has the advantages of fast response and high accuracy. Nonsinusoidal voltage waveforms.
Present day drive types are the Induction motor drives with voltage source inverters. Also the voltage waveforms of traditional two level inverter fed Induction motor shows that the voltage across the motor contains not only the required “fundamental” sinusoidal components, but also pulses of voltage i.e.
“ripple “voltage. Fig Hardware setup of three level inverter fed induction motor drive. Fig Output waveforms of phase shifting gate triggering pulses. Table Performance of multilevel inverter fed induction motor drive. Parameters Voltage(Vp-p) Speed (rpm) Phase voltage V RN V YN V BN Line voltage V RY V YB V RB.
Abstract: The paper investigates the iron losses in a PWM inverter-fed induction motor. The frequencies of PWM voltages are supplied from 60 to Hz. The measurement of core losses of electrical steel laminations in Epstein Frame is implemented to obtain the curves of core loss versus magnetic flux density under sinusoidal waveform step by step from 60 Hz to Hz.
This paper presents 37 kW induction motor loss measurement results with sinusoidal and PWM supply. Five different commercial frequency converters are used to obtain single motor losses. View. Abstract: Standard low- and medium-power induction motor drives are based on the pulse width modulation (PWM) voltage-source inverter (VSI) fed from a diode rectifier.
The dual topology, based on the current-source inverter/rectifier structure is used in medium- and high-power applications. This paper analyzes the existing motor drives based on current-source topologies and proposes a control.
gives the THD and switching losses in each phase voltage at different switching frequencies. As the switching frequency is increased THD is reduced.
The total switching losses are calculated as discussed in section 3, and tabulated in table1 for the different carrier frequencies ranging from toHz. Twolevel inverter fed induction motor. induction motor as shown in Figure In inverter model, we used pulse width modulation technique and IGBT as a switch.
In this model different cable gauges: #6, #8, #10, #12, and #14 AWG type of cable  per meter is connected in between the inverter and the motor of 3HP, and a V pulse voltage is applied to the motor through.voltage waveforms.
The seven levels can follow a voltage reference with accuracy and with the advantage that the generated voltage can be modulated in amplitude instead of pulse-width modulation.The simulation of three phase seven level inverter fed induction motor model is done.Induction motor drive is used in almost all industries including oil and gas sectors, production plants and process industries.
Speed control of induction motor is a major concern. The proposed technology implements a better speed control for induction motor drives using a multilevel inverter.