Title :
A digital current sensor for PWM inverters
Author :
Ogasawara, Satoshi ; Murata, Kazuhiro ; Akagi, Hirofumi
Author_Institution :
Nagaoka Univ. of Technol., Niigata, Japan
Abstract :
A digital current sensor having the properties of high accuracy, high speed, and low cost for measuring the output current of a pulse-width-modulated (PWM) inverter is described. The digital current sensor forms a closed-loop current sensor with a tracking-type analog-to-digital converter. A prototype digital current sensor of 12 bits is developed and excellent experimental results are shown in the case when an input current of an induction motor (2.2 kW) driven by a PWM inverter is measured by the digital current sensor
Keywords :
digital circuits; electric current measurement; electric sensing devices; induction motors; invertors; pulse width modulation; 12 bit; 2.2 kW; PWM inverter; closed-loop; digital current sensor; induction motor; pulse width modulation; tracking type ADC; Analog-digital conversion; Costs; Current measurement; Induction motors; Prototypes; Pulse inverters; Pulse measurements; Pulse width modulation inverters; Sensor phenomena and characterization; Velocity measurement;
Conference_Titel :
Industry Applications Society Annual Meeting, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-0635-X
DOI :
10.1109/IAS.1992.244444
