34719 - Electric Measurements

Learning outcomes

- uncertainty expression for measurements results
- how instrumentation for electrical measurements works
- measurement methods of low frequency electrical signals
- electrical signal conditioning and acquisition
- numeric signal processing
- measurement for characterization of electrical machines
- simple measurement on electrical plants

Course contents

Measurement uncertainty.
The International System of Units.
Resistor characterization in DC.
Signal conditioning: the operational amplifier.
Time and frequency measurements.
Discussion of the A/D conversion process. The Sample and Hold device.
D/A converter.
A/D converter:
- instantaneous value conversion (flash converter, SAR converter)
- medium value converter (double slope, multiple slope and voltage to frequency converter).
Measurement on periodic signals.
The electronic multimeter.
Data acquisition boards.
Active and reactive power definition and measurements.
Digital oscilloscope.
The IEEE488 bus.
Characterization of resistors, inductors and capacitors.
The voltampermetric method for impedance measurements
Impedance measurement: Wien, Schering and Maxwell bridges
Current and voltage transformers. Hall current sensor and Rogowsky coil.
Measurements on three phase circuits.
Measurement on nonsinusoidal conditions.
Analog and digital spectrum analyzers.
Power quality measurement instruments.
Partial discharges measurement.
Hint on measurements for electromagnetic compatibility and for electromagnetic pollution.
Measurements on electrical machines.
Measurements on transformers.
Measurements on asynchronous machines.
Measurements on electrical plants.

Readings/Bibliography

Domenico Mirri, Gaetano Iuculano, Misure Elettroniche - CEDAM

Teaching methods

Classroom lectures

Assessment methods

Oral exam

Office hours

See the website of Gaetano Pasini