Angular Velocity Estimation for Sensorless Brushless DC Motors
(2024)Department of Automatic Control
- Abstract
- In the automotive industry today, safety is of highest priority. ASIL is a safety standard that quantifies risk. This project investigates how a redundant speed estimate in a sensorless BLDC motor can be developed to meet ASIL B requirements. The proposed solution involves tracking the shape of the phase curve to determine the angular velocity. This is accomplished by changing the boundaries on the ADC, making it work as a comparator, to find limit events.
The results show that the algorithm successfully tracks the angular velocity. The error residual is noisy, with a maximum mean error of −5.64 rad/s. The error is believed to be due to unexpected disturbances on the phase curve. To get the final estimate, a moving average filter with... (More) - In the automotive industry today, safety is of highest priority. ASIL is a safety standard that quantifies risk. This project investigates how a redundant speed estimate in a sensorless BLDC motor can be developed to meet ASIL B requirements. The proposed solution involves tracking the shape of the phase curve to determine the angular velocity. This is accomplished by changing the boundaries on the ADC, making it work as a comparator, to find limit events.
The results show that the algorithm successfully tracks the angular velocity. The error residual is noisy, with a maximum mean error of −5.64 rad/s. The error is believed to be due to unexpected disturbances on the phase curve. To get the final estimate, a moving average filter with window size n = 6 and n = 18 is applied, corresponding to one and three mechanical revolutions.Window size n=6 is preferred to reduce delay, but n = 18 is more stable with the present disturbances. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9165361
- author
- Martinsson, Victor
- supervisor
- organization
- year
- 2024
- type
- H3 - Professional qualifications (4 Years - )
- subject
- report number
- TFRT-6241
- other publication id
- 0280-5316
- language
- English
- id
- 9165361
- date added to LUP
- 2024-06-18 13:36:08
- date last changed
- 2024-06-18 13:36:08
@misc{9165361, abstract = {{In the automotive industry today, safety is of highest priority. ASIL is a safety standard that quantifies risk. This project investigates how a redundant speed estimate in a sensorless BLDC motor can be developed to meet ASIL B requirements. The proposed solution involves tracking the shape of the phase curve to determine the angular velocity. This is accomplished by changing the boundaries on the ADC, making it work as a comparator, to find limit events. The results show that the algorithm successfully tracks the angular velocity. The error residual is noisy, with a maximum mean error of −5.64 rad/s. The error is believed to be due to unexpected disturbances on the phase curve. To get the final estimate, a moving average filter with window size n = 6 and n = 18 is applied, corresponding to one and three mechanical revolutions.Window size n=6 is preferred to reduce delay, but n = 18 is more stable with the present disturbances.}}, author = {{Martinsson, Victor}}, language = {{eng}}, note = {{Student Paper}}, title = {{Angular Velocity Estimation for Sensorless Brushless DC Motors}}, year = {{2024}}, }