Archive for the ‘Power Components’ Category

Standard heat pipe to increase working size in cold plate

Friday, January 15th, 2010

ARLINGTON HEIGHTS, ILLINOIS, USA, Friday, January 15, 2010: Hill Tech Sales, a leader in Components for Thermal Management and Electrical Power Conversion today posted information on standard heat pipes to increase working size in a cold plate.

Most times engineers will look at the standard 30cm length of heat pipe and dismiss using it in an application because their working distance is beyond 30 cm. The same occurrence also applies to heat dissipation being over the rating of a single heat pipe.

Heat Pipe interleave in a cold plate

Heat Pipe interleave in a cold plate

 Both of these issues can easily be addressed by using a properly designed heat pipe assembly. The first issue of length is easily addressed by interleaving heat pipes in a plate assembly with a nominal amount of overlap, in many cases 2 to 3 cm.

 The second issue of enhancing thermal dissipation can be addressed by using the round heat pipes in a flattened state, stacking them side by side in an assembled plate. Since the heat pipes themselves are rather inexpensive, it is good design practice to add additional pipes to improve your design margin.

 Note another inherent advantage in this concept is that this assembly now has improved built-in reliability through redundancy of heat transfer devices in the unlikely event of a single heat pipe failing.

For more questions on this article contact:

Vince Hill
Hill Technical Sales
216 West Campus Drive
Arlington Heights, IL 60004   
Tel: +1- 847-255-4400  ext 12
Fax: +1-847-255-0192    

You may also visit: http://www.hilltech.com/

Tags: , , , , , , , , , , , , , , ,
Posted in News, Power Components | No Comments »

Meeting contract flow down % goals with transformer supplier for: Small HUBZone business, and women-owned small business

Monday, January 11th, 2010

ARLINGTON HEIGHTS, ILLINOIS, USA, Monday, January 11, 2010: Hill Tech Sales, a leader in Components for Electrical Power Conversion today posted information on meeting contract flow down percentage goals with Transformer supplier for: Small disadvantaged business, Small HUBZone business, and women-owned small business.

Large companies, when awarded a Federal government contract, may need to adopt a similar plan for themselves and their subcontractor, since the subcontracting plan is normally incorporated into awarded contract.

A lot of times it is difficult finding high quality reliable suppliers of transformers / inductors and still meet the flow down plans distinct goals for small, small disadvantaged, small HUBZone, WOB (women-owned small), veteran-owned small, and service-disabled veteran-owned small businesses.

We have selected unique companies that meet the high quality standards required by todays large firms for specialty transformers / inductors / CT’s (Current Transformers) / and PT’s, and also allow you to meet your flow down requirements for WOB and small business.

The flow-down process is intended to ensure that all small businesses receive “maximum practicable opportunity” to perform on Government contracts and subcontracts in accordance with public laws, regardless of the subcontracting tier.

Note:  the risk is that if a contractor fails to make a good faith effort to achieve the goals in its subcontracting plan, may be found in material breach of the contract and terminated for default.

Small business and WOB also a have advantages in terms of Subcontracting reports that are required by larger firms; Individual Subcontracting Report (ISR) and Summary Subcontracting Report (SSR).

Let us help you meet your small HUBZone, WOB (women-owned small business) flow down requirements.

For more questions on this article contact:

Alena Kamin
Customer Service Manager
Hill Technical Sales
216 West Campus Drive
Arlington Heights, IL 60004  
Tel: +1- 847-255-4400  ext 12
Fax: +1-847-255-0192   

You may also visit: http://www.hilltech.com/

Tags: , , , , , , , , , , ,
Posted in News, Power Components | No Comments »

8 Liquid Cooling Methods For High Power Energy Storage Devices

Thursday, January 7th, 2010

ARLINGTON HEIGHTS, ILLINOIS, USA, Thursday, January 07, 2010: Hill Tech Sales, a leader in components for Electrical Power Conversion and Thermal Management today posted information on 8 methods liquid cooling for energy storage.

Large scale solutions for energy storage present a new challenge regarding the heat produced and its effect on batteries and capacitors used for energy storage. The heat generated by the adjacent power components used in the inverter/converter often over shadows the losses created by charging and discharging batteries and capacitors.

In most cases great care is taken cool the switching devices and magnetic components however the batteries and capacitors are sometimes over looked yet they also are impacted by elevated temperatures in terms of degraded life and performance.

If liquid for cooling is available there are 8 key cold plate construction methods commonly used as a solution:

 Batteries and caps can be recessed into the plate to increase the conductive area and if needed additional thermal interface material is applied to increase thermal performance.

Sizes of these plates range from a few centimeters to slightly more than 2 meters.

An additional consideration is using a heat pipe assembly to remove heat from the internal structure of the capacitor or battery to the cold plate.

For more questions on this article contact:

Vince Hill
Thermal Specialist
Hill Technical Sales
216 West Campus Drive
Arlington Heights, IL 60004   
Tel: +1- 847-255-4400  ext 12
Fax: +1-847-255-0192    

You may also visit: http://www.hilltech.com/

Tags: , , , ,
Posted in News, Power Components | No Comments »

Ceramic composite resistors provide a reliable solution for Lithium-ion battery pre-charge circuits

Monday, November 30th, 2009

ARLINGTON HEIGHTS, ILLINOIS, USA, Monday, November 30, 2009: Hill Tech Sales, a leader in components for Electrical Power Conversion today posted information on Lithium-ion battery pre-charge resistors.

Large scale Lithium-ion battery technologies present a new challenge regarding enormous inrush current requirements when used in Electrical Vehicle (EV) applications. Ceramic composite resistors provide a reliable high energy resistor solution for these pre-charge events.

Modern DC converters use input capacitors as part of their power converters’ topology.  When used with a Lithium-ion battery, huge inrush currents can occur as the capacitors are charged up to the battery voltage. The inrush becomes extremely difficult to handle when using large batteries with a low source resistance, and substantial capacitance values. Combined with little and/or no charge on the capacitors, inrush currents peaking over 1000 Amperes can easily occur.

A typical solution is to use a high energy resistor in a DC pre-charge circuit, to limit inrush current without limiting the operating current. Ceramic composite resistors are made for these applications. Unlike wire wound resistors or metal film resistors where only a metal conductor is absorbing the energy, the composite resistors’ entire mass is absorbing the energy yielding incredibly high impulse energy capacity. Reliability and robustness is also greatly increased since there is no “thin wire” acting as a conducting medium.

Typically a pre-charge resistor is used between a battery and the load to:

  • Prevent damaging the input capacitors.
  • Protect battery cells.
  • Stop the main fuse from blowing during the inrush current event.
  • Prevent damaging the contactors in the circuit.

Sizes of high energy resistors range from a few kilo-joules to mega-joules.

For more questions on this article contact:

Kurt Neuswanger
High Energy Resistor Specialist
Hill Technical Sales
216 West Campus Drive
Arlington Heights, IL 60004   
Tel: +1- 847-255-4400  ext 11
Fax: +1-847-255-0192    

You may also visit: http://www.hilltech.com/

Tags: , , , , , , ,
Posted in News, Power Components | No Comments »

Ultra-Low Silicone Thermal Gap Filler Provides

Wednesday, October 21st, 2009

ARLINGTON HIEIGHTS, ILLINOIS, USA, October 21, 2009: Hill Tech Sales, a leader in components for electrical power conversion and thermal management today is introducing ultra-low silicone gap fillers to its line of thermal interface materials.

Hill Technical has added new TP-S3LS ultra-low silicone gap fillers to its line of thermal interface materials. TP-S3LS pads contain less than 50 parts per million of silicone while providing 3.0 W/mK of thermal conductivity between hot components and their heat sinks. The gap filler’s minimal silicone content makes it suitable for use in silicone-sensitive applications including medical electronics, laser optics and telecommunications where silicone-based out gassing can lead to contamination and condensation issues or leave oily residues that interfere with process applications. The TP-S3 family of materials was developed by Chang Sung Corp. and is manufactured by Dongyun Electronics in South Korea.

Pads of TP-S3LS material are soft and compliant for easy compression and filling of air gaps between irregular mating surfaces. The material’s Shore 00 hardness is 55. TP-S3 pads can be used in temperatures up to 200°C, which exceeds the use range of silicone-free gap fillers. The material has a UL 94 flame class rating of V-0. Its dielectric breakdown voltage is over 5.0 kV.

New TP-S3 gap filler material is available in 210 x 297 mm (8.3 in x 11.7 in) sheets or die-cut parts. Standard sheet thicknesses range from 0.5 to 5.0 mm (0.020 in to 0.196 in).  Pricing for standard flat TP-S3LS sheets starts at $0.10 per square inch, which is below the cost of other 3.0 W/mK thermal gap fillers now available. Lower priced TP-S materials are also available with thermal conductivities of 2.0 and 1.0 W/mK.

For more information on all TP-S3LS ultra-low silicone gap filler materials, visit www.hilltech.com or contact:

Vince Hill
Thermal Account Manager
Hill Technical Sales
216 West Campus Drive
Arlington Heights, IL 60004    
Tel: +1- 847-255-4400  ext 15
Fax: +1-847-255-0192     

You my also visit: http://www.hilltech.com/

Tags: , , , ,
Posted in News, Power Components | 2 Comments »

Ultra miniature, cost effective, 1 watt DC/DC converters

Monday, October 19th, 2009

ARLINGTON HIEIGHTS, ILLINOIS, USA, October 16, 2009: Hill Tech Sales, a leader in components for electrical power conversion today is introducing Ultra miniature, cost effective, 1 watt DC/DC converters.

These 1 watt products feature continuous output short circuit protection – a critical safety feature that protects the load circuit and the converter from dangerously high current levels in ultra miniature packages:

AM1DR-RZ (SIP7: 19.50 x 7.20 x 9.50mm) and AM1MR-Z (DIP14: 20.30 x 10.16 x 6.90mm) operate at the most commonly designed fixed inputs of 5, 12, and 24VDC (with ±10% tolerance).

 Highly regulated and protected output voltages 3.3, 5, 7.2, 9.12, 15VDC feature a tight load regulation of ±0.5% to ensure that stable voltages are delivered throughout the operating range, under all types loading conditions.

 Each of the 18 models in the AM1DR-RZ and AM1MR-Z series feature input/output isolation of 1000VDC, allowing these versatile power supplies to be configured for reverse polarity on the output or to be wired in series to create higher output voltages.

 Operating within an industrial temperature of -40°C to +85°C without derating, both the AM1DR-RZ and AM1MR-Z series are engineered to meet the IEC 60950-1 standard for use with indoor or outdoor telecommunication networks or cable distribution systems.   The components MTBF of greater than 1,500,000 hours further supports their use in applications where access for maintenance is limited or restricted. 

 RoHS compliant, all models undergo 100% production testing of their parameters to ensure the high reliability, while remaining competitively priced 

For more information, contact:

Alena Kamin
Customer Service Manager
Hill Technical Sales
216 West Campus Drive
Arlington Heights, IL 60004    
Tel: +1- 847-255-4400  ext 13
Fax: +1-847-255-0192     

You my also visit: http://www.hilltech.com/

Tags: , , ,
Posted in Power Components | No Comments »

Inverter Driven Centrifugal Blower for Clean Room Applications

Monday, October 19th, 2009

ARLINGTON HIEIGHTS, ILLINOIS, USA, October 19, 2009: Hill Tech Sales, a leader in components for electrical power conversion is announcing Inverter Driven Centrifugal Blower used for Clean Room Applications.

These blowers are designed to have a high output while running quiet with minimum energy input. The high efficiency designed motor allows only a ten degree temperature rise at its rated air output of 375 CFM at 0″ H2O. The inverter outputs a constant 230vac, three phase at 60hz thus allowing for a common input of 220vac, single phase at either 50 or 60Hz. This enables the blower to have a constant output in countries throughout the world.

An IEC 60320 shrouded male plug terminates to the blower with a 15 foot International Harmonized 3 x 1.00mm2 cord set. The rotor is dynamically balanced and incorporates ball bearings providing a quiet long life. The air inlet and outlet accommodate 4″ flexible duct. Construction, materials and finishes enable us to meet MIL-SPECS and operate in harsh environments as well as in the office, lab or clean room.

See some of the custom blowers Hill Technical has created for their customers at www.hilltech.com

For more information, contact:

Alena Kamin
Customer Service Manager
Hill Technical Sales
216 West Campus Drive
Arlington Heights, IL 60004    
Tel: +1- 847-255-4400  ext 13
Fax: +1-847-255-0192     

You my also visit: http://www.hilltech.com/

Tags: , , , , , ,
Posted in Power Components | No Comments »

Just four steps to getting the Fuse that suits your needs

Monday, October 5th, 2009

ARLINGTON HIEIGHTS, ILLINOIS, USA, Oct 05, 2009:   Hill Tech Sales, a leader in Photovoltaic technology. Today is  introducing a link to the four steps to getting a “ PV Fuse that suits your needs”. 

This article is an  invaluable document in how to determine rated values that enable optimum use of PV Fuse Links for PV Installations.

For more information, contact:

Alena Kamin
Customer Service Manager
Hill Technical Sales
216 West Campus Drive
Arlington Heights, IL 60004   
Tel: +1- 847-255-4400  ext 13
Fax: +1-847-255-0192    

You my also visit this hilltech link

Tags: , , ,
Posted in News, Power Components | No Comments »

AMSR1-78Z: Smallest DC- DC switching regulators with 1A output current

Monday, September 28th, 2009

ARLINGTON HIEIGHTS, ILLINOIS, USA, September 28, 2009: Hill Tech Sales, a leader in components for electrical power conversion is proud to introduce the smallest DC- DC switching regulators with 1A output current

This a new Aimtec series of non-isolated, DC-DC switching regulators which produce a high output current of 1A within one of the smallest SIP3 packages, measuring only 11.7 x 7.4 x 10.2mm for lower profile circuit implementations such as portable power and standby-power applications.   

This is a feature rich alternative to 78xx linear regulator. For example the AMSR1-78Z step-down converters accept wide inputs ranging from 4.75-18VDC to 6.50-18VDC that step down to tightly regulated (±0.6%) output voltages starting as low as 1.5 to 5VDC, within efficiency rates as high as 94%.

 Amazingly it is also pin-to-pin compatible with the TO-220 package, and does not require a heat sink, input and output capacitors or any of the other external components associated with traditional linear regulators. 

 The technical and cost benefits of the AMSR1-78Z’s feature rich design include:

· simplified design process by eliminating the need to add ancillary components;

· designed to operate at full output power without heatsink;

· high efficiency that eliminates the need for forced air cooling below +85°C;

· continuous output short circuit protection;

· more efficient use of valuable PCB board space.

For more information, contact:

Alena Kamin
Customer Service Manager
Hill Technical Sales
216 West Campus Drive
Arlington Heights, IL 60004    
Tel: +1- 847-255-4400  ext 13
Fax: +1-847-255-0192     

You my also visit: http://www.hilltech.com/

Tags: , , , ,
Posted in News, Power Components | No Comments »

Hill Tech – Siba Fuse -Solar Power International Booth #419

Tuesday, September 15th, 2009

Hill Tech personnel support Siba Fuse at Solar Power International Booth #419

 Hill Tech will be supporting Siba Fuse at the Solar Power International show in Anaheim CA, beginning Tuesday, October 27. This show has sold out the Exhibit Floor with 900 plus Companies Reserve 203,900 Sq. Ft. of space more than doubling show size from 2008. 

Siba will be showing its complete line of PV fuse for PV invertor protection and PV panel, junction box protection. 

If you are in the great lake region contact us to schedule design review or product training at the booth during the show. 

You my also contact Hill Tech at 847-255-4400 or visit www.hilltech.com

Tags: , ,
Posted in News, Power Components | No Comments »