Title :
Wide bandwidth low complexity isolated current sensor to be employed in a 10 kW/500 kHz three-phase unity power factor PWM rectifier system
Author :
Laimer, Gerold ; Kolar, Johann W.
Author_Institution :
Power Electron. Syst. Lab., Swiss Fed. Inst. of Technol., Zurich, Switzerland
Abstract :
A current sensor employing a Hall-based field sensing ASIC in combination with a current transformer is proposed. The sensor is characterized by a measuring range of ±50 A, an upper bandwidth limit of 20 MHz and high dV/dt-immunity up to 10 kV/μs. The sensor functional principle and dimensioning are discussed in detail. Parameters determining the sensor bandwidth are clarified, the theoretical considerations are verified by experiments. Finally, measures for further increasing the sensor bandwidth are proposed.
Keywords :
Hall effect devices; PWM power convertors; application specific integrated circuits; current transformers; electric current measurement; electric sensing devices; rectifying circuits; 10 kW; 20 MHz; 500 kHz; AC current transformer; Hall-based field sensing ASIC; current transformer; high dV/dt-immunity; measuring range; sensor bandwidth increase; sensor functional dimensioning; sensor functional principle; three-phase unity power factor PWM rectifier system; upper bandwidth limit; wide bandwidth low complexity isolated current sensor; Bandwidth; Current measurement; Current transformers; Frequency measurement; Pulse width modulation; Rectifiers; Sensor phenomena and characterization; Sensor systems; Switching frequency; Transducers;
Conference_Titel :
Power Electronics Specialists Conference, 2002. pesc 02. 2002 IEEE 33rd Annual
Print_ISBN :
0-7803-7262-X
DOI :
10.1109/PSEC.2002.1022316
