Upravljanje frekvencijskim pretvaračem pomoću procesora za digitalnu obradu signala

master's thesis

• Title (english): Frequency converter control using digital signal processor
• Author: Ante Markić
• Mentor: Mario Vražić (mentor)
• Committee member: Mario Vražić (predsjednik povjerenstva)
• Committee member: Viktor Šunde (član povjerenstva)
• Committee member: Damir Sumina (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2015-07-10, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Pokazani su načini upravljanja asinkronim motorom. Opisani su dijelovi frekvencijskog pretvarača. Projektiran je izmjenjivački dio frekvencijskog pretvarača. Korišten je inteligentni učinski modul. Odabrani su elementi za mjerenje napona i struje istosmjernog međukruga, struja dvije faze motora i temperature učinskog modula. Predviđeno je sučelje za inkrementalni enkoder. Osigurana je galvanska izolacija energetskog i korisničkog dijela pretvarača. Odabrani su optoizolatori za izolaciju upravljačkih signala. Korišten je LTspice za simulaciju izolacije digitalnog signala u dva smjera. Odabrana su izolacijska pojačala za izolaciju analognih mjernih signala. Projektirano je napajanje svih dijelova frekvencijskog pretvarača. Odabran je procesor za digitalnu obradu signala prikladnih mogućnosti. Osmišljeno je korisničko sučelje sastavljeno od LCD ekrana i tipki.

Abstract (english)

Induction motor control methods were shown. Variable frequency drive components were identified and described. Inverter for a variable frequency drive was designed. An intelligent power module was used. Measuring devices were chosen for DC link voltage and current measurement, motor phase current measurement and IPM temperature measurement. A quadrature encoder interface was included in the design. High-voltage parts were galvanically isolated from user interface. Optocouplers were chosen for isolation of inverter control signals. LTspice was used to simulate two-way digital signal isolation circuit. Isolation amplifiers were used for isolation of analogue measurement signals. Power supply elements were chosen for all components of the VFD. A digital signal controller of satisfying capabilities was chosen. A user interface was designed, consisting of an LCD screen and push buttons.

• Keywords: Asinkroni motor; Frekvencijski pretvarač; Skalarno upravljanje; U/f; Vektorsko upravljanje; PWM; SVM; Ispravljač; Istosmjerni međukrug; Izmjenjivač; Inteligentni učinski modul; IGBT; Pobudni stupanj; Termistor; NTC otpornik; LTspice; Optoizolator; Izolacijsko pojačalo; Strujni pretvornik; Mjerni otpornik; Naponsko djelilo; Diferencijalni signal; Procesor za digitalnu obradu signala; DSP; Kontroler za digitalnu obradu signala; DSC; Harvardska arhitektura; Oscilator; Brojač; Prekid; Inkrementalni enkoder; Sučelje za kvadraturni enkoder; Analogno-digitalni pretvornik; ADC; SPI; I2C; UART; ECAN; USB OTG; PICkit 3; Tipka; LCD
• Keywords (english): Induction motor; Variable frequency drive; VFD; Scalar control; V/f; Vector control; PWM; SVM; Rectifier; DC Link; Inverter; Intelligent power module; IPM; IGBT; Driver; Thermistor; NTC resistor; LTspice; Optocoupler; Isolation amplifier; Current transducer; Shunt resistor; Voltage divider; Differential signal; Digital signal processor; DSP; Digital signal controller; DSC; Harvard architecture; Oscillator; Timer; Counter; Interrupt; Incremental encoder; Quadrature encoder interface; QEI; Analog-to-digital converter; ADC; SPI; I2C; UART; ECAN; USB OTG; PICkit 3; Push button; LCD
• Language: croatian
• URN:NBN: urn:nbn:hr:168:865385
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2018-02-06 10:27:28