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Variable frequency motor drives provide enormous operational and control benefits, but their ability to dynamically control a motor requires equivalent dynamic analysis capability for validation and debug during research and development. The Teledyne LeCroy Motor Drive Analyzer (MDA) dynamically measures per-cycle power and harmonic distortion values, plots them as Waveforms, and permits easy correlation of these values to drive AC input waveforms.
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The Teledyne LeCroy Motor Drive Analyzer is ideal for measuring dynamic (transient) losses to enable better understanding of motor and drive efficiencies during real-world operation. Additionally, the Motor Drive Analyzer derives the core and copper loss components using known motor constants and compares them to engineering models and the drive control feedback circuit. The accuracy of the measurements is sufficient to permit comparisons of different drive control and motor types.
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The Teledyne LeCroy Motor Drive Analyzer is ideal for measuring dynamic (transient) losses to enable better understanding of motor and drive efficiencies during real-world operation. Additionally, the Motor Drive Analyzer derives the core and copper loss components using known motor constants and compares them to engineering models and the drive-control feedback circuit.
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The two-wattmeter method reduces from six to four the number of input channels required to measure power on a three-phase system. With this method, the calculated power values from each line-line voltage and line-neutral current pair are not in phase or balanced, though the total three-phase power value is correct. However, the Motor Drive Analyzer (MDA) performs a line-to-line to line-neutral conversion and displays accurate and balanced per-phase power values that aid in understanding proper three-phase system operation.
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The Controlled Area Network (CAN) serial data protocol communicates information over a serial bus in automotive and industrial applications. For motor applications, CAN data may contain digitally encoded electric motor shaft speed. The MDA extracts this encoded data, converts it to an analog value, rescales it, and then uses it in the MDA as a source for motor shaft speed.
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More than 90% of motor and motor-drive designs involve small, low-power motors and drives used in household, commercial, or light industrial applications. Such motors need not meet rigorous IEC or NEMA efficiency standards, but engineers still want to measure their designs’ efficiency. The Teledyne LeCroy Motor Drive Analyzer measures drive and motor efficiency at a bench without an expensive and/or scarce dynamometer.
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Motors with more than three-phases suit applications calling for redundancy and high reliability. The MDA captures voltage and current signals from both winding sets, measures total static and dynamic power consumption, and calculates balance amongst the two winding sets.
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