Catalogo motores weg completo

The voltage distortion is related to the magnitude of the current harmonics of the electrical equipment and also to the network impedance, i. Figure 4 - Typical input currents for the 6-pulse recifier or at the primary of the phase-shifting transformer input 12 and pulse and their respective harmonic spectrum harmonic components expressed as a percentage of the fundamental. In several applications, the six-pulse variable frequency drive with an input line reactor or a DC reactor may perfectly meet the IEEE recommendations. The fundamental idea of the multipulse configurations can be understood as the interconnection of six-pulse rectifiers so that the characteristic harmonics generated by these rectifiers are cancelled by the harmonics generated by other sets of rectifiers.

Uploader: Yozshuzuru
Date Added: 22 March 2017
File Size: 16.66 Mb
Operating Systems: Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X
Downloads: 20110
Price: Free* [*Free Regsitration Required]





Particular attention needs to be given to the increase on the equipment complexity and to the reduction on the efficiency and reliability of the whole system due to the use of a larger number of components.

calculo de harmonicasr WEG - 1 00

The data presented in the following figures were obtained considering an ideal system. This is due to the pre-existing imperfections of the electrical system, such as, voltage unbalance, pre-existing harmonic distortion, etc.

This mitigation is performed by appropriate design of the phase-shifting transformer with multiple secondaries. Caatlogo the same time that the harmonic currents at low frequencies are reduced, there are other disadvantages in increasing the number of rectifier pulses such as: Parte 1 de 4 4.

The characteristic harmonics of the six-pulse rectifier are given by: The voltage distortion is related to the magnitude of the current harmonics of the electrical equipment and also to motoges network impedance, i.

The currents drained by this converter are of pulsed-type, containing low-order harmonics that may cause voltage harmonic distortion at the electric power supply system where VFDs are connected.

In several applications, the six-pulse variable frequency drive with an input line reactor or a Motpres reactor may perfectly meet the IEEE recommendations.

The fundamental idea of the multipulse configurations can be understood as the interconnection of six-pulse rectifiers so that the characteristic harmonics generated by these rectifiers are cancelled by the harmonics generated by other sets of rectifiers.

Figure 1 - six-pulse rectifier Figure 2 - Voltage distortion caused by currents drained by a non-linear load. The increase in the number of the rectifier pulses and the use of an appropriate phase-shifting transformer allow the mitigation of the harmonic components at the primary of the transformer. The characteristic harmonics can be represented as follows:. Figure 4 - Typical input currents for the ctaalogo recifier or at the primary of the phase-shifting transformer input 12 and pulse and their respective harmonic spectrum harmonic components expressed catalkgo a percentage of the fundamental.

Read soft-starter-weg

Another factor that contribute to the appearance of non-characteristic harmonics is the transformer imperfections, which blocks the mitigation of non-characteristic harmonics at the primary of the transformer. When wegg is not possible, the following options are available for reducing the harmonic currents: The following figure shows the spectrum of these harmonics and their magnitude as a percentage of the fundamental.

The magnitudes of these harmonics, in respect of the fundamental, are given by:. The three-phase full-wave bridge rectifier, also known as Graetz Bridge or six-pulse rectifier Figure 1 is one of the most catalpgo configurations for the input stage of VFDs.

The indirect frequency converters or variable frequency drives VFDs are usually composed of an input diode rectifier stage. The harmonics of the six-pulse rectifier that are present on the secondary of the transformer will be cancelled and will not appear at the primary of the transformer that is connected to the utility.

calculo de harmonicasr WEG - 1 00 - planilha excell para calclo de harmonicas

The greater the number of pulses of the rectifier, the lower the current harmonic content at low frequencies. Figure 4 shows the expected typical waveforms of cmpleto input currents and their respective harmonic spectrum to the 6, 12 and pulse configurations.

It is important to emphasize that the harmonics multiple of the 3rd are cancelled in a balanced three-phase system zero sequence.

In the numerical simulation the system was modeled as: In practice, however, the non-characteristic harmonics usually present a magnitude different from zero.

4 thoughts on “Catalogo motores weg completo”

  1. Certainly. I agree with told all above. We can communicate on this theme. Here or in PM.

  2. I can not take part now in discussion - there is no free time. But I will soon necessarily write that I think.

Leave a Reply

Your email address will not be published. Required fields are marked *