Analys och minskning av effektförlusterna i en borstlös likströmsmotor med vektorstyrning
(2023) In CODEN:LUTEDX/TEIE EIEM01 20231Industrial Electrical Engineering and Automation
- Abstract
- This report addresses power losses in an electric motor arising from various sources. The choice of motor control strategy can decrease efficiency if not implemented correctly or if the motor model in the control loop is overly simplified. BorgWarner, a key manufacturer of automotive components, experienced a significant increase in energy losses and reduced performance when switching their BLDC motors’ control strategy from block commutation to field-oriented vector control. The aim of this study is to analyze the differences between the implemented control algorithms at BorgWarner and identify and minimize the source of the increased losses. The report documents the approach taken to reduce power losses in the control of a brushless DC... (More)
- This report addresses power losses in an electric motor arising from various sources. The choice of motor control strategy can decrease efficiency if not implemented correctly or if the motor model in the control loop is overly simplified. BorgWarner, a key manufacturer of automotive components, experienced a significant increase in energy losses and reduced performance when switching their BLDC motors’ control strategy from block commutation to field-oriented vector control. The aim of this study is to analyze the differences between the implemented control algorithms at BorgWarner and identify and minimize the source of the increased losses. The report documents the approach taken to reduce power losses in the control of a brushless DC motor caused by an improper selection of currents in the dq-plane. The project strategy involves measurements and simulations to enhance the understanding of the specific motor in question, with the goal of identifying more energy-efficient combinations of control currents that better account for the motor’s electromagnetic properties. The simplified motor model in the control system was updated to select control signals that minimize losses based on operating conditions. The results demonstrate a drastic reduction in energy losses in the system with a maximum decrease of 50 W and 63 % (from 85 to 35 W) and an increased knowledge of the motor’s characteristics for the company. Furthermore, the project establishes a foundation for further development and improvement of the efficiency of BorgWarner’s implementation of field-oriented vector control. (Less)
- Popular Abstract
- Different control strategies are used today for driving electrical motors depending on the applicaqtion. The choice of motor control strategy can affect efficiency if not implemented correctly or if the motor model in the control loop is overly simplified. A increased energy-loss is often detected as increased heating of the motor caused by too high currents. Finding the origin if these high currents and minimizing energy losses is the object of interest in this master thesis project. BorgWarner, a key manufacturer of automotive components, experienced a significant increase in energy losses and reduced performance when switching their BLDC motors’ control strategy from block commutation to field-oriented vector control. The company... (More)
- Different control strategies are used today for driving electrical motors depending on the applicaqtion. The choice of motor control strategy can affect efficiency if not implemented correctly or if the motor model in the control loop is overly simplified. A increased energy-loss is often detected as increased heating of the motor caused by too high currents. Finding the origin if these high currents and minimizing energy losses is the object of interest in this master thesis project. BorgWarner, a key manufacturer of automotive components, experienced a significant increase in energy losses and reduced performance when switching their BLDC motors’ control strategy from block commutation to field-oriented vector control. The company required an analysis of the differences between their implemented control algorithms and the identification of the source for the increased losses
with the aim of reducing them. The measured stator currents in the rotating dq-frame revealed that the company’s block commutation algorithm effectively utilizes the direct axis current when driving the motors on high speeds. Recognizing the energy efficiency benefits of a negative direct axis current in the motor, a strategy was developed to incorporate this feature into a Field-Oriented Control (FOC) algorithm. A CAD-model of the BLDC-motor was used in combination with a numeric computing environment and measured data to optimize the combination of direct and quadrature currents and minimize power losses, in other words, to find the Maximum Torque Per Ampere curve (MPTA). The outcome of this optimization process is a detailed mapping of the recommended control currents based on rotational speed and desired mechanical torque. This new mapping of the motor not only deepens the understanding of BorgWarner’s BLDC-motor but also achieves a significant reduction in power losses from 85 W to 35 W at 2500 RPM and 0.15 Nm when applied to the FOC control algorithm. The updated algorithm makes the FOC control as efficient as the company’s block commutation algorithm for middle high speeds, marking a noticeable improvement over the previous FOC control implementation. Furthermore, the project establishes a foundation for future development and enhancement of BorgWarner’s field-oriented vector control, preparing for further efficiency improvements in their implementation. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9132325
- author
- Garcia Parrales, Lider Xavier LU
- supervisor
-
- Mats Alaküla LU
- Avo Reinap LU
- organization
- course
- EIEM01 20231
- year
- 2023
- type
- H3 - Professional qualifications (4 Years - )
- subject
- keywords
- Effektförluster Borstlös likströmsmotor BLDC Vectorstyrning Field-oriented Control FOC Blockkommutering Block commutation MTPA
- publication/series
- CODEN:LUTEDX/TEIE
- report number
- 5502
- language
- Swedish
- id
- 9132325
- date added to LUP
- 2023-08-29 14:01:42
- date last changed
- 2023-08-29 14:01:42
@misc{9132325,
abstract = {{This report addresses power losses in an electric motor arising from various sources. The choice of motor control strategy can decrease efficiency if not implemented correctly or if the motor model in the control loop is overly simplified. BorgWarner, a key manufacturer of automotive components, experienced a significant increase in energy losses and reduced performance when switching their BLDC motors’ control strategy from block commutation to field-oriented vector control. The aim of this study is to analyze the differences between the implemented control algorithms at BorgWarner and identify and minimize the source of the increased losses. The report documents the approach taken to reduce power losses in the control of a brushless DC motor caused by an improper selection of currents in the dq-plane. The project strategy involves measurements and simulations to enhance the understanding of the specific motor in question, with the goal of identifying more energy-efficient combinations of control currents that better account for the motor’s electromagnetic properties. The simplified motor model in the control system was updated to select control signals that minimize losses based on operating conditions. The results demonstrate a drastic reduction in energy losses in the system with a maximum decrease of 50 W and 63 % (from 85 to 35 W) and an increased knowledge of the motor’s characteristics for the company. Furthermore, the project establishes a foundation for further development and improvement of the efficiency of BorgWarner’s implementation of field-oriented vector control.}},
author = {{Garcia Parrales, Lider Xavier}},
language = {{swe}},
note = {{Student Paper}},
series = {{CODEN:LUTEDX/TEIE}},
title = {{Analys och minskning av effektförlusterna i en borstlös likströmsmotor med vektorstyrning}},
year = {{2023}},
}