Product category:
Drives, motors and power transmission, couplings, clutches
News Release from: Fluke (UK) | Subject: Troubleshooting variable-speed drives
Edited by the Manufacturingtalk Editorial
Team on 03 November 2005
Troubleshooting variable-speed drives
A free, downloadable Application Note explains how a handheld meter troubleshoots pulse-width-modulated variable speed drives to analyse the voltage-frequency ratio.
A free, downloadable Application Note from the Fluke web site explains how a handheld Fluke 190 Series ScopeMeter makes it easy to troubleshoot pulse-width-modulated (PWM) variable speed drives using the oscilloscope's unique measuring and triggering functions to analyse the voltage-frequency ratio To verify that the voltage/frequency ratio is constant over the working range of a Variable Speed Drive (VSD), the Vpwm function available on some Fluke 190 Series ScopeMeters gives a true measurement of the voltage actually applied to the motor while simultaneously measuring the frequency: the use of a true-rms voltmeter in these circumstances would give an erroneous reading of the full bandwidth signal
This article was originally published on Manufacturingtalk on 16 Oct 2001 at 8.00am (UK)
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The Connect-and-View triggering of the ScopeMeter also ensures a stable display, whereas the complex modulated waveforms produced by VSDs often make it difficult to obtain a stable picture on other oscilloscopes.
With safety certification to 1,000V CAT II and 600V CAT III, Fluke ScopeMeters help users to safely solve virtually all electronics measurement problems encountered in the field.
The Fluke ScopeMeter 190 Series of handheld, two-channel oscilloscopes include 196 and 199 models, available with either monochrome or colour screens.
The 196 and 199 models offer 100MHz or 200MHz bandwidths and 1GS/s or 2.5GS/s sampling rates respectively, as well as providing a true-RMS Multimeter in one affordable, easy to use instrument.
The high-resolution waveforms can also be transferred to a PC running optional FlukeView ScopeMeter software for documenting, archiving and analysis.
The Application Note for 'Checking voltage-frequency ratio on variable-speed drives with a Fluke ScopeMeter 190 Series' and many other ScopeMeter applications can be freely downloaded from Fluke's web site via the 'Applications' drop down menu, or can be obtained by contacting Fluke directly. Request a free brochure from Fluke (UK) ...
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