Tag Archives: 자동차

Figure 3. Thermocouple mounting positions in the heatsink and headlamp reflector

AUTOMOTIVE HEADLAMP HIGH POWER LED COOLING SYSTEM AND ITS EFFECT ON JUNCTION TEMPERATURE AND LIGHT INTENSITY

1. Overview: 2. Background: Automotive headlamps are crucial for nighttime safety and vehicle aesthetics. Historically, halogen and xenon bulbs were prevalent, but halogen bulbs are inefficient, generating significant heat, while xenon bulbs have slower ignition times. High-Power Light Emitting Diodes (HPLEDs) offer higher efficiency and longer lifespans, but their compact size leads to high junction

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Figure 16. DC-Bus IGBT heatsink and capacitance.

Three-Phase 75 kW Brushless Direct Current Motor for Electric Vehicles: Different Power Stage Design, Calculation of Losses, Cooling Techniques, and Comparison

1. Overview: 2. Research Background: The increasing need to reduce CO2 and SO2 emissions due to climate change necessitates improvements in electric vehicle efficiency. While Brushless Direct Current (BLDC) motors are widely used in EVs due to their high power density, efficiency, and reliability, their operational lifespan is limited by high internal heat generation and

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Figure 5 Aluminum wiring in automotive vehicles: a time line of application of aluminum in automotive wiring, reproduced from [53]; b high-strength aluminum alloy wire installed in the engine harness, reproduced from [57]; c die-cast aluminum coil for motor winding with seven turns and a conductor height of approx. 1.5 mm along with d coil arrangement, reproduced from [264]; e hairpin motor using aluminum V-cat windings, reproduced from [59]; f insulated and bare AA1350 aluminum of 7 AWG square tested for hairpin winding of electric motors and copper wire for comparison along with stress vs strain elongation curves, reproduced from [11].

Aluminum alloys for electrical engineering: a review

1. Overview: 2. Research Background: High-performance conductors are essential for economically and environmentally sustainable electricity transfer in modern infrastructure, manufacturing, and transportation, including electric vehicles. While copper has been the traditional conductor of choice, aluminum offers significant advantages in terms of cost and weight reduction for electricity transmission and distribution. Over 14% of global aluminum

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A Study on Cooling Characteristics of the LED Lamp Heat Sink for Automobile by Forced Convection

A Study on Cooling Characteristics of the LED Lamp Heat Sink for Automobile by Forced Convection

1. Overview: 2. Research Background: Automotive headlamps are crucial for driver visibility, and LED lamps are gaining popularity due to their energy efficiency and long lifespan. However, the high heat generation of LED lamps can reduce their lifespan and efficiency. Existing water-cooled cooling plates and heat pipes offer superior cooling performance but are limited by

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Fig .4 Thermal management of LED head lamp

Heat Dissipation Design of High Power LED Headlamp

1. Overview: 2. Background: High-brightness white light-emitting diodes (LEDs) are very promising in many new illumination applications. LED light sources offer advantages such as long lifespan, fast response speed, environmental friendliness (mercury-free), and a color temperature (5500K-6000K) closer to natural light than xenon sources (4000K). The increasing use of LEDs in automotive lighting (interior lights,

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Figure 4. Cross Section of Stator of 3‐F Induction Motor.

A Review of Recent Trends in High Efficiency Induction Motor Drives

1. Overview: 2. Research Background: Induction Motor (IM) drives are a crucial technology in modern industry, powering various applications including material handling, food and beverage processing, and electric transportation systems like EVs and e-trucks. Recently, there’s a growing focus on high-efficiency IM drive systems to reduce energy and fuel consumption, aligning with global sustainability initiatives.

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Fig. 4 Mesh generation and Region

Cooling Performance of LED Head Lamp with Heat Sink and Cooling Fan

1. Overview: 2. Research Background: The increasing use of LEDs in automotive lighting systems presents a challenge due to heat generation from high-power LEDs, leading to performance degradation and reduced lifespan. Previous research identified factors affecting LED lifespan and analyzed heat transfer characteristics through heat sink design modifications. However, these studies lacked optimal cooling system

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Fig. 5. Double silica cooling structure with copper meshes (Ref. [186]).

A Review of Air-Cooling Battery Thermal Management Systems for Electric and Hybrid Electric Vehicles

1. Overview: 2. Background: The paper begins by highlighting the increasing concentration of greenhouse gases (GHGs) since the 1900s, primarily due to the combustion of fossil fuels in internal combustion engines (ICEs). Transportation is a significant contributor to these emissions. Electric Vehicles (EVs) and Hybrid Electric Vehicles (HEVs) are presented as promising solutions to reduce

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Fig. 5. Schematic of cooling system assembled with different number of heat pipes:(a) is 2 heat pipes, (b) is 3 heat pipes, (c) is 4 heat pipes, and (d) is 6 heat pipes.

A novel automated heat-pipe cooling device for high-power LEDs

1. Overview: 2. Research Background: High-power LEDs are increasingly popular in various applications, offering advantages like long lifespan, high reliability, low energy consumption, fast response time, and color variability. However, their efficiency (15-25% power-to-light conversion) is limited, with over 80% of power dissipated as heat, leading to high junction temperatures. Maintaining junction temperatures below 120°C

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Figure 1. Fin designs on heat sinks: left with all parallel fins, right with angled fins increasing turbulence in the air (cooling medium) and increasing air exchange between the fins to maximize cooling [2].

Vacuum Rheocasting Heat Sinks with Significantly Improved Performance

1. Overview: 2. Research Background: The demand for heat sinks across various industries (e-mobility, telecommunications, electronics, etc.) is significantly increasing, along with stricter performance requirements. A primary requirement for heat sinks is high thermal conductivity. Pure aluminum exhibits excellent thermal conductivity (247 W/mK), but it’s challenging to cast and possesses low strength. Typical die-casting alloys

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