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Fujitsu General, Ltd. Chooses the WT1600 Digital Power Meter and SignalExplorer DL7100 |
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Fujitsu General, Ltd.
Development Division 2,
Development Technology Group,
Mr. Masanori Mukami
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We are working on developing control technologies for home electronics, mainly air conditioner motors.
One of the important keys to producing reduced-energy consumer appliances is to decrease the power consumption of the motors and inverters. To evaluate power consumption, we use the WT1600 Digital Power Meter.
The reason we chose the WT1600 was its ability to analyze harmonics of waveforms input from motors or inverters.
Especially since the voltage and current waveforms input from motors tend to be quite distorted, each frequency component must be analyzed. Therefore we need an oscilloscope to monitor waveforms, and an FFT analyzer to measure the voltage and current of each frequency component. The WT1600 can accept simultaneous voltage and current input on 6 channels, and easily perform multichannel measurement of voltage and current at each frequency component, all in one unit.
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Our group worked on the
motor for the Nocria
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The WT has a wide frequency bandwidth of 0.5 Hz to 1 MHz, so it's capable of measuring even distorted waveforms at high accuracy. Furthermore, a single WT can compute motor and inverter I/O efficiency, so it's extremely useful for evaluating decreases in power consumption.
With normal measurement, dispersion often occurs in instantaneous data, so we use the averaging function with its wide range of adjustability to obtain the average characteristics. Also, the data update rate can reach 50 ms (20 times per second), so we can load data that fluctuates at both slow and fast intervals.
The WT has a variety of display functions-from simultaneous display of numeric and waveform data to bar and vector graphs for watching the frequency-and the displays are in color which makes them really easy to read.
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ACNocria TM
Products by Fujitsu General
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To evaluate whether the motor control is working as designed, we have to be able to observe digital and analog signals simultaneously.
The DL7100 SignalExplorer digital oscilloscope has 4 channels of analog input and 16 bit logic input in one unit, so it's very efficient for simultaneous measurement. One of the main reasons we chose it was because of its sampling rate of 1 GS/s, and its high display update rate.
Visit the Fujitsu General Web site.
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