Accurate measurement of instantaneous values of voltage, current and power for power electronics circuits

For power electronics circuits, such as inverter circuits, the measurement of the instantaneous average value of the output voltage is rather troublesome and has never been undertaken in a rigorous sense. However, it becomes important when the inner states of the load connected to the inverter have...

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Bibliographic Details
Published inPESC 98 Record. 29th Annual IEEE Power Electronics Specialists Conference (Cat. No.98CH36196) Vol. 1; pp. 302 - 307 vol.1
Main Authors Tung-Hai Chin, Nakano, M., Hirayama, T.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.01.1998
Subjects
Current measurement
Induction motors
Insulated gate bipolar transistors
Integrated circuit measurements
Machine vector control
Power electronics
Power measurement
Pulse width modulation
Pulse width modulation inverters
Voltage measurement
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Summary:For power electronics circuits, such as inverter circuits, the measurement of the instantaneous average value of the output voltage is rather troublesome and has never been undertaken in a rigorous sense. However, it becomes important when the inner states of the load connected to the inverter have to be calculated using the quantities of the load terminal voltages and currents, such as in the case of the vector control of induction motors without speed sensors. This paper tries to give an accurate measuring method for this voltage. The voltage cluster from the inverter is integrated every half period of the switching. Then the output of the integrator will be reset to zero after its volt-second value has been detected digitally. Two groups the circuits take the alternative operation. As the concerning subject, the measurement of the instantaneous current and power has also been discussed.
ISBN:0780344898
9780780344891
ISSN:0275-9306
DOI:10.1109/PESC.1998.701915