Teledyne LeCroy unveiled new three-phase motor drive power analyser software for its HDO8000 oscilloscopes, whose 8 input channels, 12-bit resolution and up to 1 GHz bandwidth are well suited for motor drive embedded control and power section debug.
With the addition of three-phase power analyser capability and motor speed and torque integration, the complete drive system can be more quickly and easily validated and debugged, and extensive drive and motor power and efficiency measurements may be performed.
This solution is aimed at designers and manufacturers of motors, motor drives, variable frequency drives, variable speed drives, industrial automation and motion control equipment manufacturers. Design engineers that integrate motors into their designs (vehicles, power tools, appliances, elevators, fans, blowers, compressors, pumps, etc.) can use it to validate proprietary controls and complete drive system designs.
An intuitive graphical user interface provides setup/connection guidance. Setup capability is provided for any combination of single-phase or three-phase drive input/output, and supports both two- and three-wattmeter calculation methods and a line-line to line-neutral voltage conversion. Using the two-wattmeter method, drive input/output and motor output efficiencies can be measured using the eight inputs on the HDO8000.
The software permits simple integration of nearly any type of speed, rotation or position sensor, including analog and digital (pulse) tachometers, brushless DC (BLDC) Hall sensor, quadrature encoder interface (QEI) and resolvers. Additionally, Hall sensor and QEI signals can be integrated through digital inputs, preserving valuable analog input channels for other signals.
Various voltage, current, power (real, apparent and reactive), phase angle/power factor and efficiency parameters are calculated on acquired voltage and current waveforms, and are displayed in a table. The table is user-configurable and is displayed along with the acquisition waveform, and corresponds to information normally provided by a power analyser.
Additionally, a waveform showing any per-cycle measurement parameter variation can be displayed by simply selecting a table value. This waveform is time-correlated with other waveforms acquired by the oscilloscope and can be used to correlate complex drive behaviours to other control or power system waveforms, and to debug drive system problems. Statistical detail of the measurement set can also be displayed.
For more information contact Comtest, +27 (0)11 608 8520, info@comtest.co.za, www.comtest.co.za
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