Active Cooling Solution for LED Heat Dissipation

With the LED lighting industry becoming a more mainstream market, how to effectively cool the equipment from LED powered street lamps to PAR30 consumer lighting lamps has become an important topic in the industry.

In particular, as LED lighting continues to migrate to higher wattage and higher lumens, passive cooling solutions are no longer sufficient to conduct and emit heat out of the LED and into the surrounding environment in a fast and effective manner. This means that thermal management manufacturers need to develop smaller, lower cost designs, such as active cooling modules, to help cool higher power LED lamps and bulbs. Many new cooling designs are for LED downlights and spotlights, including A19 and MR16 bulbs. As an example, we will introduce Sunon and nuventix's series of LED active cooling modules.

Since LED lighting is not a market where manufacturers can effectively pursue cost, they must sell it by performance, explained John Fulmer, Suwon's Regional Sales Manager in the United States and the southern half of Latin America. This translates into the use of factors such as lumens, low power consumption and long service life to confirm the customer's return on investment (ROI) at a relatively high upfront cost.

Fulmer said that for large devices, sales performance, long life and overall value become more important. "When they enter these different applications, the scale of the thermal challenge becomes larger. It is no longer just a small bulb; it is a very large heat source." traditionally, electronic designers want to cool led systems through passive solutions if possible. In fact, most LED lights are cooled by some form of radiator or other passive cooling solution without fan, he said, adding that this is one of the reasons why Sunon and other heat suppliers have been playing with UAVs. They provide a variety of heat sinks in the cooling market.

"But what we found is that in order to realize the advantages of product technology, in some cases you really need active cooling," Fulmer said. He pointed out that even the perfect LED lamp that could theoretically last for many years could suddenly become a five-month bulb because it had exceeded the allowable thermal performance specifications.

Customers now tell thermal management suppliers that they can't cool some of their lighting fixtures well just by using radiators. In some cases, it's impossible because the radiators are too large and the cost is too high, Fulmer said.

The active cooler or cooling module uses both a radiator and a cooling fan. This is because radiators are a very good way to cool equipment, but they usually reduce their efficiency because they collect dust. However, according to Fulmer, there is an active cooler with a patented fan positive / negative steering design, which not only cools the radiator, but also cleans the water tank.

In addition, active coolers can generally be obtained with smaller size and lower cost. By selecting an active cooler, the size of the radiator is reduced, which saves more money than the cost of adding a fan. According to Fulmer, the combination of the two provides good performance at low cost and brings more benefits to the desktop.

Fulmer gave an example of a Philips product radiator solution with a diameter of 175mm, a thickness of 30mm and a weight of 570g. For the same LED light source, Sunon provides an active cooler with a much smaller water tank, with a diameter of 85mm, a thickness of 35mm and a smaller overall volume. It also weighs significantly less than the radiator, reducing the overall weight of the solution.

This can reduce the upfront cost of lighting fixtures. "When comparing the performance between the two, the active cooler performs better in cooling, so it is more likely to obtain a higher level of optical performance," Fulmer said. "It is also a low-cost solution because most of the cost is embedded in a large sink."

Sunon offers a variety of MR16 and A19 active coolers, including radiators and fans, including la001, la002, la003, la004, ta001, ta002, ta003 and ta004. They are available in a variety of sizes and shapes for spotlight applications (Figure 1). The minimum cooler diameter is 50 mm and the maximum cooler diameter is 85 mm. Radiators and fans can also be purchased separately.

Figure 1: Sunon provides various la00x and ta00x MR16 and A19 active cooling modules, which combine radiator and cooling fan to provide lower cost and smaller solution for hybrid LED spotlight manufacturers (picture provided by Sunon).

These active coolers are usually used for consumer LED products. Fulmer said that a variety of fan and radiator sizes are available to accommodate a variety of LED lighting provider products.

Nuventix also saves costs through its patented synjet technology cooler for industrial applications (see techzone article "industrial cooling using nuventix synjet technology and complementary led radiators"). The company offers a variety of coolers, including zflow 90 and synjet spotlight cooler 70 w for downlights and low ceiling lighting for industrial applications. The spotlight cooler adopts a small, lightweight and economical design, adopts forced cooling, consumes 70 W, and can achieve light of up to 10000 lumens in the overall dimensions of 118 to 134 mm.

Nuventix has also recently introduced the LED radiator r150-170 based on synjet Technology (Figure 2). The high shed led cooler is 33% smaller and 60% lighter than the passive cooling equivalent used in industrial applications. The modular solution can be used as a stand-alone heat sink or up to three synjets.

Figure 2: nuventix r150-170 high temperature box cooler for industrial applications reduces total cost of ownership by maintaining thermal performance and saving maintenance costs (provided by nuventix).

Due to heat pipe and synjet air transmission, the r150-170 led radiator can cool up to 20000 lumens in a circular design. The company said that lighting manufacturers can use smaller and cheaper LED arrays and still achieve high color quality and lumen output. This is because r150-170 has advanced thermal diffusion and heat transfer capabilities.

In conclusion, as LED lighting manufacturers move to higher power designs, passive cooling solutions are no longer sufficient to dissipate the heat generated by LED lamps. This means considering active cooling solutions for more efficient heat dissipation. In many cases, these solutions have a variety of advantages, including smaller package size and lower cost, which helps LED lighting designers maintain the specified performance level and LED life.

get in touch with us
recommended articles
Principle of Voltage Parallel Circuit and Voltage Switching Circuit
Popular interpretation of nounsVoltage paralleling: for sectional wiring of single bus, when the PT of section I bus stops and the line of this bus continues to work, and the secondary voltage needs to be measured and protected, the voltage paralleling device is put into operation to provide the secondary voltage of section II bus to the protection and metering device on section I bus (previously, the primary voltage is in parallel).For double bus connection, similarly, when the Pt on the #1 bus stops, the secondary voltage of the Pt on the #2 bus can also be provided to the protection and metering device of the line on the #1 bus through voltage parallel.Voltage switching: in case of double bus connection, #1 and #2 buses operate separately. On which bus a line runs, the voltage of which bus PT is used for the second time. When the operator switches the primary disconnector, the secondary voltage shall also be able to switch automatically.Voltage parallel circuit01principleTaking 10kV single bus section as an example, the following figure is the primary main wiring diagram.The 10KV voltage parallel circuit of a voltage parallel device is analyzed below.When the two sections of bus operate separately, the section circuit breaker 3Qf is in the off position, and the primary operation and the secondary operation are also operated separately;If the PT of bus I needs to be shut down and the line on bus I still needs to continue to operate normally, we can close the section breaker 3Qf to make the primary bus in parallel operation. At this time, turn the voltage parallel handle to the parallel position, and the relays J4, J5 and J6 in the automatic parallel circuit are charged. The normally open contacts of J4 and J5 are closed, and the secondary voltage of the two sections of bus is parallel in the voltage parallel device, At this time, the voltage (protection and metering) on the small bus on the top of the 10kV High voltage room is the secondary voltage of the II bus Pt.02Juxtaposition and splitting logicIt can be seen from the automatic parallel circuit that when #1pt and #2pt are only one Pt in the working position and the other Pt in the non working position, the automatic parallel circuit can have the necessary conditions for conduction. When two PTS are in the working position at the same time, the automatic parallel circuit is disconnected and the voltage parallel cannot be completed.Let's look at another voltage parallel circuit:If the parallel logic needs to be completed, the normally open contacts of the collected section switch position (DL), section handbrake position (S9) and section isolated handbrake position (3s9) need to be connected in series, and then connected to the voltage parallel device. Parallel can be allowed only when the above three are closed at the same time.If the parallel handle (7qk) is set to the parallel position at this time, 1-2 contacts are connected, the parallel relays 3yqj1, 3yqj2 and 3yqj3 are powered on, and the corresponding contacts are closed to complete the parallel operation of two sections of buses.If splitting is required, it is necessary to connect another pair of normally closed contacts of section switch position (DL), section handbrake position (S9), section isolation handbrake position (3s9) and splitting contacts 3-4 of parallel handle (7qk) in parallel. When any pair of contacts are closed, splitting is completed.For the single bus section wiring mode, voltage paralleling requires that the section switches of bus I and bus II and the knife switches on both sides must be closed.Voltage switching circuitTake the voltage switching circuit of czx-12r operation box as an example:1yqj1 3 and 2yqj1 3 are voltage relays, 1yqj4 7 and 2yqj4 7 are two position relays. When a line is hung on I bus, the normally open contact of I bus disconnector is closed and the normally closed contact is disconnected, so that 1yqj6 7 relay is charged, and the voltage collected by the protection device is I bus voltage; When the line changes from bus I operation to bus II operation, bus I knife switch is disconnected, its normally closed contact is closed, and 1yqj6 7 double position relay returns; The normally open contact of II bus disconnector is closed to energize 2yqj6 7 relay, so that the voltage collected by the protection device is II bus voltage.02Two position relayThe dual position relay is used to ensure that the voltage switching circuit can still provide the normal bus voltage before power failure to the protection device when the auxiliary contact circuit of the knife switch is powered down.The problem caused by the two position relay is: when the bus switching operation separates the knife switch, if the normally closed contact and circuit of the knife switch are abnormal, the original acting two position relay cannot return, then although the primary equipment has separated from the original bus, the secondary voltage switching main circuit still switches the secondary voltage of the bus to the protection device, And in parallel with the secondary voltage of another section of bus. If it is not found in time, the abnormal paralleling of bus secondary voltage will occur when the bus is separated, which may burn the weak nodes on the voltage switching main circuit and cause abnormal voltage circuit (PT disconnection).Therefore, there is such an alarm signal: "the voltage switching relay acts at the same time". When the two switching relays act at the same time, their normally open contacts are connected at the same time (in series) to send an alarm signal, indicating that the auxiliary contact and circuit of the knife switch are in an abnormal state, and inform the operation and maintenance personnel of the hidden danger.
What Does CPA Wide View Technology and SLCD Mean
What Are Some Ways to Keep My Hair Really Healthy?
How Was the First Sale of Vivo X60 Series?
Huami Technology Held a Press Conference on August 27, and Amazfit Smart Sports Watch 3 Officially A
Connect to Nonencrypted Wireless Network Using Ubuntu Commands
Is Time Travel Possible? Can We Travel Back in Time?
Which Is a Better Design to Put on a Beer Pong Table?
What Else to Do on PS3?
How to Protect Data on IOT Devices
related searches
Principle of Voltage Parallel Circuit and Voltage Switching Circuit
What Does CPA Wide View Technology and SLCD Mean
What Are Some Ways to Keep My Hair Really Healthy?
How Was the First Sale of Vivo X60 Series?
Huami Technology Held a Press Conference on August 27, and Amazfit Smart Sports Watch 3 Officially A
Connect to Nonencrypted Wireless Network Using Ubuntu Commands
Is Time Travel Possible? Can We Travel Back in Time?
Which Is a Better Design to Put on a Beer Pong Table?
What Else to Do on PS3?

Copyright © 2020 Coffee bag - Guangzhou tianci packaging industry Co,. Ltd. | Sitemap