DOI: 10.21227/8h30-gc79
title: 1.88kW BLDC Sensorless FOC with Flux Observer

description: Note: Author has submitted 4 or more different datasets but the instructions and abstract is almost similar in all of these datasets except method and motor specifications.This dataset is on the study of Motor controllers, for which author has done numerous experiments, and the analysis along with these will also be shortly submitted to "IEEE Transactions on Power Electronics".The results contained in this dataset are graphs which give intutive idea on the control characteristics, whether the pole/zero is on the imaginary axis or the right half plane. Still in today's practice, the switching frequency for these controllers are used even 20 kHz or more, whereas MOSFETs can be switched to 2 MHz.BLDC motors ae used in medical industry ,ventillators, solar trackers, CNC servodrives, industrial robots, automative, electric vehicles- autos, rickshaws etc.Using this dataset, the industrial engineer can decide whether to run at that frequency or not. So, this study comes in handy to decide when designing in practice for industries and also for academia purposes.In this particular dataset, MOSFET is switched from 20 kHz to 2MHZ , at 46 different PWM frequencies and the resulting characteristics.The author has also used these results in designing new 2-3 different complex models (incomplete), may be uploaded later. There are related datasets submitted to IEEE-Dataport and also to the Transaction Papers. So, the instructions and abstract is almost similar in all of these datasets.The speed and the position estimation of BLDC is done using the sensorless vector control method i.e., Field Oriented control (FOC) with the addition of Flux observer which gives the estimation of speed and the sensorless rotor position. The switching pattern of the 3-phase inverter is implemented using space vector modulation.DIfferences in this paper dataset can be seen as the author has included following , with analysis which can be drawn from seeing attached graphs -performance comparison using FOC with flux observer at different frequencies.PWM switching frequency is varied 46 times from 20 kHz to 2 MHz , - will help decide MOSFETs switching frequency. (as in industries even 20kHz is used)Of course, the Rdson, dc link inverter voltage ,other practical parameters etc has been taken into consideration (not submitted here) bu some analysis related to it,you may find in the authors Transaction paper.Separate results at all these 46 frequenciesStability Margins - Gain/PhaseOpen Loop Control PerformanceTransfer Function CompensationClosed loop TuningRoot Locus of Uncompensated System and Compensated SystemBode Plot - magnitude and phasePole Zero Map of Uncompensated System and Compensated SystemUnit-Step Response of Uncompensated System and Compensated SystemNyquist plot of Uncompensated System and Compensated SystemNichols chart of Uncompensated System and Compensated SystemImpulse Response of Uncompensated System and Compensated SystemSinusoidal ExcitationAll this is implemented on 32-bit Real-Time microcontroller. The pins usage not mentioned here are used for other General-Purpose-CAN,USB, RS485 etc.