CFD Analysis of Transient Heat Conduction in the Electronic Control Circuitry of Steering Wheel Column Adjustment System

2021 ◽  
Author(s):  
Ankit Tiwari ◽  
Trevor Davey ◽  
Matthew Willis
Keyword(s):  
Heat Transfer ◽  
Junction Temperature ◽  
Normal Operation ◽  
Steering Wheel ◽  
Electronic Control ◽  
Thermal Safety ◽  
Electronic Components ◽  
Limit Condition ◽  
Power Steering ◽  
Adjustment System

Abstract Automotive grade 3 electronic components are expected to meet their functional, performance and thermal safety requirements within the ambient temperature range from −40-degree C to +85-degree C. In this study, CFD and thermal analysis of electronic control circuitry of a power steering wheel column adjustment system is performed. It consists of 6 MOSFETs (Metal Oxide Semi-Conductor Field Effect Transistor) packaged in 3 Dual package MOSFET casings (Q6, Q7 and Q8) that are arranged in two H-bridge configurations for dependent control of the two motors. Two of these MOSFETs cause thermal power dissipation during the normal operation of the system. There are also other thermally significant devices such as a reverse polarity protection MOSFET (Q1), two inductors used in a low pass filter and one current sense resistor. Because of cost and packaging limitations, there are no external heat sinks to enhance heat transfer. The components will rely on the Printed Circuit Board (PCB) and plated-through-holes/thermal vias for heat transfer to maintain operation within the thermal safety limits. The inherent transient nature of operation of the power steering wheel column adjustment system causes the circuit to draw high current for a short duration of time. This necessitates temperature dependent heat source formulation. In this study, an initial CFD study was performed to assess the thermal safety of all the electronic components in the control circuitry. It was found that the electronic components such as MOSFETs and inductors were below the maximum operating junction temperature under the hot limit condition (+85degree C) for the entire duration of operation. However, under the cold limit condition (−40-degree C), both the MOSFETs and the inductors were significantly hotter than the maximum junction temperature. Based on CFD results, the sizing and placement of thermal vias may be optimized. Further, a comparative analysis was performed to assess the different levels of fidelity offered by lumped PCB model, multi-layer PCB model and explicit modeling of thermal vias in PCB.

Heat Transfer Analysis of Extruded Rectangular Fin over Conventional Rectangular Fins by Numerical Simulation

2015 ◽  
Vol 812 ◽  
pp. 130-135
Author(s):  
Subramania Pillai Sivaraja ◽  
P.K. Balakumar ◽  
G. Sudha ◽  
R. Parthiban
Keyword(s):  
Heat Transfer ◽  
Heat Sink ◽  
Good Alternative ◽  
Computer Hardware ◽  
Dynamics Simulation ◽  
Junction Temperature ◽  
Heat Transfer Analysis ◽  
Cfd Modeling ◽  
Electronic Components ◽  
Fin Design

Improving the performance of the computers and maintaining the operating temperature is an important task for the computer hardware manufacturers. The junction temperature of the electronic components is a critical problem which needs to be addressed in a competent way. Due to the improvement in the technology, the size and weight of the electronic components reduced to a greater extent and which in turn increases the operating power and speed. This increases the heat generated by the electronic component. Electronic components normally use conventional rectangular fin as heat sink for the step up in heat transfer. The need is to make a heat sink design that should overcome the problem related to transfer of heat by the electronic components. The heat transfer depends on parameters like heat sink’s surface area, pitch, design and material used. Optimization of the fin design by number of experiments is more expensive and laborious as well. CFD (Computational Fluid Dynamics) simulation validated with experimentation can be a good alternative for performing series of experiments. CFD modeling and simulation for the best fin design has been carried out for the current study. An alternative design for conventional rectangular fin has been proposed for this study called as Extruded Rectangular Fin (ERF). The proposed ERF shows good heat transfer when compared to conventional and interrupted rectangular fin with holes. Optimum cooling achieved for the system with the fin aspect ratio of 3.5.

PHM Features for Large Circuit Boards to Be Implemented Into Electric Drivetrain Applications

2021 ◽  
Author(s):  
Alexander Otto ◽  
Eberhard Kaulfersch ◽  
Prashant Kumar Singh ◽  
Claudio Romano ◽  
Marcus Hildebrandt ◽  
...  
Keyword(s):  
Printed Circuit Boards ◽  
Experimental Methods ◽  
Accelerated Ageing ◽  
Deformation Analysis ◽  
Electronic Control ◽  
Circuit Boards ◽  
Electronic Components ◽  
Printed Circuit ◽  
Early Warning Indicators ◽  
Warning Indicators

Abstract Canary structures being used as early warning indicators represent an important tool for condition and health monitoring of electronic components and systems. In this paper, printed circuit boards with canary structures based on SMD 2512 ceramic chip resistors with reduced solder pad sizes were studied. Focus of these investigations was set on thermo-mechanical and mechanical stresses caused by passive thermal cycling as well as by vibrational loads. For this purpose, experimental methods such as deformation analysis and accelerated ageing tests as well as finite element based methods were applied. In addition, an outlook on the implementation of these canary structures into dual inverter electronic control boards for electrical powertrain applications will be given.

Co-Simulation of Power Steering Control and Vehicle Dynamic Responses

2001 ◽  
Author(s):  
Gene Y. Liao
Keyword(s):  
Dynamic Model ◽  
General Purpose ◽  
Dynamic Responses ◽  
Steering Wheel ◽  
Vehicle Dynamic ◽  
Steering Control ◽  
Integrated Simulation ◽  
Full Vehicle ◽  
Power Steering ◽  
Vehicle Dynamic Model

Abstract Many general-purpose and specialized simulation codes are becoming more flexible which allows analyses to be carried out simultaneously in a coupled manner called co-simulation. Using co-simulation technique, this paper develops an integrated simulation of an Electric Power Steering (EPS) control system with a full vehicle dynamic model. A full vehicle dynamic model interacting with EPS control algorithm is concurrently simulated on a single bump road condition. The effects of EPS on the vehicle dynamic behavior and handling responses resulting from steer and road input are analyzed and compared with proving ground experimental data. The comparisons show reasonable agreement on tie-rod load, rack displacement, steering wheel torque and tire center acceleration. This developed co-simulation capability may be useful for EPS performance evaluation and calibration as well as for vehicle handling performance integration.

scholarly journals Experimental Study on Antivibration Control of Electrical Power Steering Systems

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Zhaojian Wang ◽  
Hamid Reza Karimi
Keyword(s):  
Control Strategy ◽  
Controller Design ◽  
Electrical Power ◽  
Steering System ◽  
Steering Wheel ◽  
Bench Test ◽  
Power Steering ◽  
Motor Controller ◽  
Hydraulic Steering ◽  
Wheel Vibration

We focus on the antivibration controller design problem for electrical power steering (EPS) systems. The EPS system has significant advantages over the traditional hydraulic steering system. However, the improper motor controller design would lead to the steering wheel vibration. Therefore, it is necessary to investigate the antivibration control strategy. For the implementation study, we also present the motor driver design and the software design which is used to monitor the sensors and the control signal. Based on the investigation on the regular assistant algorithm, we summarize the difficulties and problems encountered by the regular algorithm. After that, in order to improve the performance of antivibration and the human-like steering feeling, we propose a new assistant strategy for the EPS. The experiment results of the bench test illustrate the effectiveness and flexibility of the proposed control strategy. Compared with the regular controller, the proposed antivibration control reduces the vibration of the steering wheel a lot.

scholarly journals Simulation analysis of heat transfer performance of heat sink with reduced material design

2020 ◽  
Vol 12 (5) ◽  
pp. 168781402092130
Author(s):  
Ya-Chu Chang
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Thermal Resistance ◽  
Heat Sink ◽  
Heat Transfer Performance ◽  
Electronic Device ◽  
Local Heating ◽  
Transfer Performance ◽  
Electronic Components ◽  
Thermal Reliability

The field of electronic device applications is becoming more and more extensive. With the development of science and technology and the improvement of the integration of electronic components, local heating is becoming more and more serious. If heat cannot be discharged immediately, it will cause heat to accumulate, causing the temperature of each component to exceed the limit. The reliability of electronic equipment is greatly reduced. Especially in important fields such as military and aerospace, the thermal reliability of electronic components is higher. The research results show that increasing the Reynolds number is helpful to reduce the overall temperature and thermal resistance of the heat sink, but the increase of the Reynolds number and the decrease of the thermal resistance value are gradually flat. The design concept of material reduction has a significant impact on processing and cost. The results of this article show that selecting the appropriate heat sink fins and matching the specific Reynolds number can effectively improve the heat transfer performance of the heat sink.

scholarly journals An Aging-Degree Evaluation Method for IGBT Bond Wire with Online Multivariate Monitoring

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3962 ◽  
Author(s):  
Zilang Hu ◽  
Xinglai Ge ◽  
Dong Xie ◽  
Yichi Zhang ◽  
Bo Yao ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Junction Temperature ◽  
Normal Operation ◽  
Monitoring Method ◽  
Bonding Wire ◽  
Insulated Gate Bipolar Transistor ◽  
Igbt Module ◽  
Bond Wire ◽  
Artificial Neural Network Ann ◽  
Multivariate Monitoring

The aging fracture of bonding wire is one of the main reasons for failure of insulated gate bipolar transistor (IGBT). This paper proposes an online monitoring method for IGBT bonding wire aging that does not interfere with the normal operation of the IGBT module. A quantitative analysis of aging degree was first performed, and the results of multivariate and univariate monitoring were compared. Based on the relationship between the monitoring parameters and the aging of the IGBT bonding wire, gradual damage of the IGBT bond wire was implemented to simulate aging failure and obtain the aging data. Moreover, the change of junction temperature was considered to regulate monitoring parameters. Then, the aging degree was evaluated by an artificial neural network (ANN) algorithm. The experimental results showed the effectiveness of the proposed method.

Numerical Simulation of Subcooled Flow Boiling Heat Transfer in Helical Tubes

2008 ◽  
Vol 131 (1) ◽  
Author(s):  
Jong Chull Jo ◽  
Woong Sik Kim ◽  
Chang-Yong Choi ◽  
Yong Kab Lee
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Steam Generator ◽  
Two Phase Flow ◽  
Flow Boiling ◽  
Heat Transfer Analysis ◽  
Normal Operation ◽  
Phase Flow ◽  
Two Phase ◽  
Side Flow

This paper addresses the numerical simulation of two-phase flow heat transfer in the helically coiled tubes of an integral type pressurized water reactor steam generator under normal operation using a computational fluid dynamics code. The shell-side flow field where a single-phase fluid flows in the downward direction is also calculated in conjunction with the tube-side two-phase flow characteristics. For the calculation of tube-side two-phase flow, the inhomogeneous two-fluid model is used. Both the Rensselaer Polytechnic Institute wall boiling model and the bulk boiling model are implemented for the numerical simulations of boiling-induced two-phase flow in a vertical straight pipe and channel, and the computed results are compared with the available measured data. The conjugate heat transfer analysis method is employed to calculate the conduction in the tube wall with finite thickness and the convections in the internal and external fluids simultaneously so as to match the fluid-wall-fluid interface conditions properly. Both the internal and external turbulent flows are simulated using the standard k-ε model. From the results of the present numerical simulation, it is shown that the bulk boiling model can be applied to the simulation of two-phase flow in the helically coiled steam generator tubes. In addition, the present simulation method is considered to be physically plausible in the light of discussions on the computed results.

Optimal Design Method of Fins in Automotive Oil Cooler Based on the Thermal-Hydraulic Performances

2012 ◽  
Vol 490-495 ◽  
pp. 2381-2385
Author(s):  
Bao Lan Xiao ◽  
Wei Ming Wu ◽  
Xiao Li Yu ◽  
Guo Dong Lu
Keyword(s):  
Heat Transfer ◽  
Neural Networks ◽  
Optimal Design ◽  
Heat Exchangers ◽  
Flow Resistance ◽  
Design Method ◽  
Normal Operation ◽  
Oil Cooler ◽  
Optimal Design Method ◽  
Simulation Results

The excellent thermal-hydraulic performances of oil cooler are the strong guaranty for automotives’ normal operation. In this study, the thermal-hydraulic performances of compact oil cooler units with different fin size parameters are numerical simulated. According to simulation results, combined with neural networks method, the optimal fin size parameters are determined. Based on this, the effects of different fin arrange layouts on performances are also studied, and optimal layouts for different requirements for flow resistance and heat transfer performances are put forward. This optimal design method can play a guidance role for the designer and manufacturer of heat exchangers.

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