MOS-FET as a current sensor in power electronics converters

Rok Pajer (Avtor), Miro Milanovič (Avtor), Branko Premzel (Avtor), Miran Rodič (Avtor)

Povzetek

This paper presents a current sensing principle appropriate for use in power electronics’ converters. This current measurement principle has been developed for metal oxide semiconductor field effect transistor (MOS-FET) and is based on UDS voltage measurement. In practice, shunt resistors and Hall effect sensors are usually used for these purposes, but the presented principle has many advantages. There is no need for additional circuit elements within high current paths, causing parasitic inductances and increased production complexity. The temperature dependence of MOS-FETs conductive resistance RDS−ON is considered in order to achieve the appropriate measurement accuracy. The “MOS-FET sensor” is also accompanied by a signal acquisition electronics circuit with an appropriate frequency bandwidth. The obtained analogue signal is therefore interposed to an A-D converter for further data acquisition. In order to achieve sufficient accuracy, a temperature compensation and appropriate approximation is used (RDS−ON = RDS−ON(Vj)). The MOS-FET sensor is calibrated according to a reference sensor based on the Hall-effect principle. The program algorithm is executed on 32-bit ARM M4 MCU, STM32F407.

Ključne besede

močnostna elektronika;pretvorniki;MOS-FET;tekoče meritve;power electronics;converters;current measurement;thermal model;

Podatki

Jezik:	Angleški jezik
Leto izida:	2015
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UM FERI - Fakulteta za elektrotehniko, računalništvo in informatiko
UDK:	681.5
COBISS:	18853910
ISSN:	1424-8220
Št. ogledov:	925
Št. prenosov:	317
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	močnostna elektronika;pretvorniki;MOS-FET;tekoče meritve;
URN:	URN:SI:UM:
Vrsta dela (COBISS):	Znanstveno delo
Strani:	str. 18061-18079
Letnik:	ǂVol. ǂ15
Zvezek:	ǂno. ǂ8
Čas izdaje:	2015
DOI:	10.3390/s150818061
ID:	9142711