Protection boards & Snubbers

COUGAR ELECTRONICS protection boards ARCRC enable to limit the surges generated at the terminals of a power switch, during the switching period.

ARCRC 1

ARCRC1 boards are specially designed for dual diode or thyristor
modules and IGBTs type M1 and M2

  • Resistor : Wirewound vitreous enamelled welded resistor Type RB60
  • Capacitor : Polypropylene capacitor, max. centre distance 38
  • Circuit : 2 channels, 1 common point
  • Direct connection : With steel hexagon spacer male/female M5 or M6
  • Indirect connection : male/female M4, M5 or M6 insulator or connection by wiring equipped with 6.35 faston terminal connectors.
Data sheet

ARCRC 2

ARCRC1 boards are specially designed for dual diode or thyristor
modules and IGBTs type M3 and M4

  • Resistor : Wirewound vitreous enamelled welded resistor Type RB60
  • Capacitor : Polypropylene capacitor, max. centre distance 56
  • Circuit : 2 channels, 1 common point
  • Direct connection : With steel hexagon spacer male/female M8
  • Indirect connection : male/female M4, M8 insulator or connection by wiring equipped with 6.35 faston terminal connectors.
Data sheet

ARCRC 3

ARCRC3 is adapted for more powerful “presspack” type components.

  • Resistor : Wirewound axial lead welded resistor Type RB58 or RB60 and Wirewound flat oval resistor 31W mounted on steel and brass spacers
  • Capacitor : Polypropylene capacitor, max. centre distance 51
  • Circuit : 1 channel
  • Direct connection : WThe RC input (potential) is directly connected on the
    heatsink rail or the RC output (2ndpotential) is connected by wiring equipped
    with 6.35 faston terminal connectors.
Data sheet

Protection & Snubbers

Heat pipes coolers are like the Loch Ness monster... lot's of people are speaking about, but few people have really tested them! This technology sounds a little bit mysterious for people coming from a pure electronics background ! How can such a thing (looking like a basic copper tube), would be able to convey something like 1000 time more calories than the best typical thermal conductor in electronics : copper ! You will certainly find the answer in our dedicated page to the heat pipe functioning, or to heat pipe page on wikipedia, if you want to go deeper in the subject. [caption id="attachment_1877" align="aligncenter" width="685"]Heat Pipe functionning Heat Pipe functionning[/caption]

Thermal management challenges in power electronics

As it was explained in our market analysis article about SIC semiconductors, power electronics is currently at the beginning of a revolution. Semiconductors are now able to work up to incredibly high frequency (50 to 100kHz), with excellent efficiency, and low losses. Because working at high frequency leads to reducing size and weight, this revolution increasesthe density of power losses. New thermal management challenges are in front of us. But good news, heat pipes are here to help solving them ! Here are the main reasons why ?

Heat pipe advantages

  • High thermal conductivity. Because heat pipes are using one of the most efficient way to convey calories : phase change, their high thermal conductivity will be the best advantage to solve your thermal management issues.
[caption id="attachment_1880" align="aligncenter" width="300"]Heat Pipe thermal conductivity simulation Heat Pipe thermal conductivity simulation[/caption]
  • Temperature range. It is mainly depending from the working fluid inside the heat pipe. Considering most of the power electronics application going from 50 to 200 degC, you will not find a better fluid than water. Good news, water is not dangerous and not explosive as you may know... Bad news, water is electrically conductor as you may know too. Electronics designer never sleeps soundly when water flows close to their components ! If you feel a bit of apprehension, read our next point.
 
  • Reliability. Heat pipes are excellent in reliability because they use no mooving mechanical parts and need no energy like electricity. No worry about maintaining the motor or the filter of your pump like in a cooling loop. The difference of temperature is the only "motor" which garanty an endless  functionning. Heat pipes are commonly used in aerospace application and railway, where life cycle of the product can be up to 50 years !
[caption id="attachment_1861" align="aligncenter" width="300"]Railway Heat Pipe Cooler Railway Heat Pipe Cooler[/caption] We hope this article have contributed to better understanding of heat pipes.

Contact us

For any question, enquiry, contact COUGAR ELECTRONICS here. Our thermal engineers will be happy to help :-)
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