With the LTTsmart, you can confidently master power analysis on electric drives.
The combination of 1.7 MHz bandwidth and maximum accuracy guarantees standard-compliant performance testing - better than 0.3%!
Battery-powered electric motors are increasingly becoming part of our everyday lives: cordless screwdrivers, angle grinders, electric bikes, and electric cars must operate with maximum efficiency across the widest possible load ranges.
Test standards such as DIN IEC 60034-2-3 define the test requirements for determining the efficiency of such converter-fed drives. This requires bandwidth and accuracy that only the LTTsmart offers worldwide.
The underlying chopped square-wave voltage and the associated current must be phase- and amplitude-accurate to a maximum of 0.3% error in the power measurement. To achieve this 0.3% accuracy, the theoretical frequency analysis of a square wave voltage requires consideration of all frequencies up to the 19th harmonic of the converter's switching frequency. At a switching frequency of 10-20kHz, the signal bandwidth is 0-380kHz, in which the signal fidelity of all components must be better than 0.3%. This requires measurement technology with a continuous sampling rate of 2–4MHz without distorting filters.
High-performance electric motors in automobiles in particular are increasingly using higher battery voltages, currently up to 800V. With a bandwidth of 380kHz, a pulsed 800V signal shape becomes a real challenge. The trick is to build the high-voltage divider in such a way that its total measurement error remains guaranteed to be less than 0.3% across the entire frequency, voltage, and temperature ranges—even though the non-linearities of all electronic components already have a massive impact here.
At the same time, the pulsating current of this 800V pulsating converter voltage must be measured. This is a real challenge for the galvanic isolation of the current input. This combination of required bandwidth and accuracy can only be achieved worldwide with the LTTsmart. No other power meter can meet the accuracies required by standards on the signal side across both voltage AND frequency. Either it fails in terms of accuracy or bandwidth.
The LTTsmart Power Analyzer is the only solution for your measurement requirements for electric drives on which you can reliably base your test bench design. Upward perspective included!
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