Design and programming of the software to control the sensor and sensorless BLDCM of the electrical propulsion system for the solar aircraft
Visualitza/Obre
Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2099.1/24117
Tutor / directorDong, Rong
Tipus de documentTreball Final de Grau
Data2013
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
A Brushless Direct Current (BLDC) machine and converter are applied for the electric propulsion system of the solar aircraft. BLDC motors are electronically commutated instead of mechanically, as Direct Current (DC) motors do, so the position of the rotor must be known to do the commutation
at the right moment.
The control of BLDC motors can be done in sensor or sensorless mode.
being the use of Hall-effect sensors the most widespread use inside the sensored
control. The use of the hall sensors divide a complete revolution of the motor in 6 sectors, where in each sector only two phases are conducting (block commutation, trapezoidal control).
However, considering the complexity of the high altitude, the electrical propulsion system cannot work properly if the hardware of the Hall sensors is broken. Therefore a sensorless control is necessary.
The BLDC motor provides an attractive candidate for sensorless operation
because the nature of its excitation inherently offers a low-cost way to extract rotor position information from motor-terminal voltages. The implemented
sensorless technique consists of sampling the non-fed phase voltage and comparing it to half of the DC-link voltage to detect the zero crossing point.
The most important part of the sensorless control is the sample of the non-fed phase, so the software must synchronise the sample with the PWM signal and apply the necessary delays in order to avoid commutation spikes and execute a correct BEMF measure.
The software must be able to control the motor in both sensored or sensorless
mode and to change from one to the other if an error occurs, so the code has to be compatible between the two modes.
MatèriesAirplanes -- Motors, Electric propulsion, Solar energy, Detectors -- Automatic control, Detectors -- Computer programs, Electric current converters, Detectors -- Computer programs, Avions -- Motors, Propulsió elèctrica, Energia solar, Detectors -- Control automàtic, Detectors -- Programes d'ordinador, Convertidors de corrent elèctric
ProvinençaAquest document conté originàriament altre material i/o programari no inclòs en aquest lloc web
Col·leccions
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
Thesis.pdf | Report | 2,924Mb | Visualitza/Obre |