Appliance Design - March 2009 - (Page 31) SWITCHES & RELAYS Fig. 1. Typical micro-power, Hall-effect sensor switch. In the block diagram, the X symbol depicts the Hall transducer. ity by virtually eliminating mechanical wear, mechanical shock, and electrical contact oxidation as failure modes in the sensor system. For example, wear or shock-related bending of the moving components internal to reed switches, and potential oxidation of the electrical contacts in these switches, present reliability concerns that are simply not present in similar Hall-effect switches. Additionally, while Reed switches can malfunction after exposure to large magnetic fields, Hall sensors are essentially impervious to exposure to large magnetic fields. AD03062Tow 2/9/06 4:07 PM Page 1 Table 1. Pros and cons of commonly available proximity sensor and switch technologies. Hall-effect devices also have the ability to sense magnetic fields that are physically obstructed by non-ferromagnetic materials (any material that does not attract a magnet). However, optical switches require a clear, nonobstructed path between an optical source and OFFERING UL/CSA ON MOST PRODUCTS AND an optical receiver. Therefore, the use of HallEUROPEAN APPROVALS ON CERTAIN effect sensors results in potentially simplified SNAP-ACTION THERMOSTATS AND SWITCHES mechanical designs when compared to optical sensor solutions. Hall-effect sensors will also operate reliably in the presence of, or when fully covered with, dust particles. In desktop printers Hall-effect sensors are replacing optical proximity sensors in lid open/close and print-head proximity sensing applications. Over the life of a printer, as toner particles inevitably accumulate in undesirable areas, optical sensor performance can suffer from light-path obstruction in the area of the optical sensor transmitter or receiver. However, the Hall sensor is completely immune to the presence of toner particles. Contract Manufacturing The integration of power management capaAvailable from bilities into Hall-effect switches has allowed Our Factories for drastic reductions in the power consumed in Asia. by these sensors. Many new Hall-effect sensors employ internal power cycling circuits that Whether Your Needs Are For Export Or Domestic Products, We Are Ready To Serve You. reduce average power consumption of the senTOWER Manufacturing Corporation sor to a typical value of 1 uA or less. As a result, 25 Reservoir Avenue, Providence, RI 02907 the power consumed by a Hall-effect sensor is Tel: (401) 467-7550 Fax: (401) 461-2710 often lower than the power consumed by simiwww.towermfg.com TOWER www.applianceDESIGN.com applianceDESIGN March 2009 31 http://www.towermfg.com http://www.towermfg.com http://www.appliancedesign.com
Table of Contents Feed for the Digital Edition of Appliance Design - March 2009 Appliance Design - March 2009 Contents Editorial Shipments/Forecasts News Watch Transmitting Power Wirelessly Promises to Reduce the Ever-Growing Tangle of Cords and Cables Found in the Modern Home. There Are Different Technological Approaches for Achieving this Goal, and Some Are Already on the Market. Electrochemical Capacitors Can Provide an Extra Peak-Power Boost in Battery-Operated Appliances, Allowing Product Designs to Have Smaller Battery Packs. Metallic Foams Put the Properties of Metals into Lightweight Packages. Applications for this Emerging Technology Include Gas Burners, Heat Exchangers, and Electronics Housings. Hall-Effect Switches Are Compact and Provide a High Degree of Reliability and Durability as They Virtually Eliminate Mechanical Wear, Shock, and Contact Oxidation. Blowing Agents for Polyurethane Foam Insulation Face Increased Scrutiny Due to Global Warming Concerns, but Alternatives with Lower GWP Values May Provide Solutions to Meet These Challenges. Design Marts Association Report: AHAM Advertisers' Index Appliance Design - March 2009 Appliance Design - March 2009 - Appliance Design - March 2009 (Page Cover1) Appliance Design - March 2009 - Appliance Design - March 2009 (Page Cover2) Appliance Design - March 2009 - Appliance Design - March 2009 (Page 1) Appliance Design - March 2009 - Appliance Design - March 2009 (Page 2) Appliance Design - March 2009 - Contents (Page 3) Appliance Design - March 2009 - Editorial (Page 4) Appliance Design - March 2009 - Shipments/Forecasts (Page 5) Appliance Design - March 2009 - News Watch (Page 6) Appliance Design - March 2009 - News Watch (Page 7) Appliance Design - March 2009 - News Watch (Page 8) Appliance Design - March 2009 - News Watch (Page 9) Appliance Design - March 2009 - News Watch (Page 10) Appliance Design - March 2009 - News Watch (Page 11) Appliance Design - March 2009 - Transmitting Power Wirelessly Promises to Reduce the Ever-Growing Tangle of Cords and Cables Found in the Modern Home. There Are Different Technological Approaches for Achieving this Goal, and Some Are Already on the Market. (Page 12) Appliance Design - March 2009 - Transmitting Power Wirelessly Promises to Reduce the Ever-Growing Tangle of Cords and Cables Found in the Modern Home. There Are Different Technological Approaches for Achieving this Goal, and Some Are Already on the Market. (Page 13) Appliance Design - March 2009 - Transmitting Power Wirelessly Promises to Reduce the Ever-Growing Tangle of Cords and Cables Found in the Modern Home. There Are Different Technological Approaches for Achieving this Goal, and Some Are Already on the Market. (Page 14) Appliance Design - March 2009 - Transmitting Power Wirelessly Promises to Reduce the Ever-Growing Tangle of Cords and Cables Found in the Modern Home. There Are Different Technological Approaches for Achieving this Goal, and Some Are Already on the Market. (Page 15) Appliance Design - March 2009 - Transmitting Power Wirelessly Promises to Reduce the Ever-Growing Tangle of Cords and Cables Found in the Modern Home. There Are Different Technological Approaches for Achieving this Goal, and Some Are Already on the Market. (Page 16) Appliance Design - March 2009 - Transmitting Power Wirelessly Promises to Reduce the Ever-Growing Tangle of Cords and Cables Found in the Modern Home. There Are Different Technological Approaches for Achieving this Goal, and Some Are Already on the Market. (Page 17) Appliance Design - March 2009 - Transmitting Power Wirelessly Promises to Reduce the Ever-Growing Tangle of Cords and Cables Found in the Modern Home. There Are Different Technological Approaches for Achieving this Goal, and Some Are Already on the Market. (Page 18) Appliance Design - March 2009 - Transmitting Power Wirelessly Promises to Reduce the Ever-Growing Tangle of Cords and Cables Found in the Modern Home. There Are Different Technological Approaches for Achieving this Goal, and Some Are Already on the Market. (Page 19) Appliance Design - March 2009 - Electrochemical Capacitors Can Provide an Extra Peak-Power Boost in Battery-Operated Appliances, Allowing Product Designs to Have Smaller Battery Packs. (Page 20) Appliance Design - March 2009 - Electrochemical Capacitors Can Provide an Extra Peak-Power Boost in Battery-Operated Appliances, Allowing Product Designs to Have Smaller Battery Packs. (Page 21) Appliance Design - March 2009 - Electrochemical Capacitors Can Provide an Extra Peak-Power Boost in Battery-Operated Appliances, Allowing Product Designs to Have Smaller Battery Packs. (Page 22) Appliance Design - March 2009 - Electrochemical Capacitors Can Provide an Extra Peak-Power Boost in Battery-Operated Appliances, Allowing Product Designs to Have Smaller Battery Packs. (Page 23) Appliance Design - March 2009 - Metallic Foams Put the Properties of Metals into Lightweight Packages. Applications for this Emerging Technology Include Gas Burners, Heat Exchangers, and Electronics Housings. (Page 24) Appliance Design - March 2009 - Metallic Foams Put the Properties of Metals into Lightweight Packages. Applications for this Emerging Technology Include Gas Burners, Heat Exchangers, and Electronics Housings. (Page 25) Appliance Design - March 2009 - Metallic Foams Put the Properties of Metals into Lightweight Packages. Applications for this Emerging Technology Include Gas Burners, Heat Exchangers, and Electronics Housings. (Page 26) Appliance Design - March 2009 - Metallic Foams Put the Properties of Metals into Lightweight Packages. Applications for this Emerging Technology Include Gas Burners, Heat Exchangers, and Electronics Housings. (Page 27) Appliance Design - March 2009 - Metallic Foams Put the Properties of Metals into Lightweight Packages. Applications for this Emerging Technology Include Gas Burners, Heat Exchangers, and Electronics Housings. (Page 28) Appliance Design - March 2009 - Metallic Foams Put the Properties of Metals into Lightweight Packages. Applications for this Emerging Technology Include Gas Burners, Heat Exchangers, and Electronics Housings. (Page 29) Appliance Design - March 2009 - Hall-Effect Switches Are Compact and Provide a High Degree of Reliability and Durability as They Virtually Eliminate Mechanical Wear, Shock, and Contact Oxidation. (Page 30) Appliance Design - March 2009 - Hall-Effect Switches Are Compact and Provide a High Degree of Reliability and Durability as They Virtually Eliminate Mechanical Wear, Shock, and Contact Oxidation. (Page 31) Appliance Design - March 2009 - Hall-Effect Switches Are Compact and Provide a High Degree of Reliability and Durability as They Virtually Eliminate Mechanical Wear, Shock, and Contact Oxidation. (Page 32) Appliance Design - March 2009 - Hall-Effect Switches Are Compact and Provide a High Degree of Reliability and Durability as They Virtually Eliminate Mechanical Wear, Shock, and Contact Oxidation. (Page 33) Appliance Design - March 2009 - Blowing Agents for Polyurethane Foam Insulation Face Increased Scrutiny Due to Global Warming Concerns, but Alternatives with Lower GWP Values May Provide Solutions to Meet These Challenges. (Page 34) Appliance Design - March 2009 - Blowing Agents for Polyurethane Foam Insulation Face Increased Scrutiny Due to Global Warming Concerns, but Alternatives with Lower GWP Values May Provide Solutions to Meet These Challenges. (Page 35) Appliance Design - March 2009 - Blowing Agents for Polyurethane Foam Insulation Face Increased Scrutiny Due to Global Warming Concerns, but Alternatives with Lower GWP Values May Provide Solutions to Meet These Challenges. (Page 36) Appliance Design - March 2009 - Blowing Agents for Polyurethane Foam Insulation Face Increased Scrutiny Due to Global Warming Concerns, but Alternatives with Lower GWP Values May Provide Solutions to Meet These Challenges. (Page 37) Appliance Design - March 2009 - Blowing Agents for Polyurethane Foam Insulation Face Increased Scrutiny Due to Global Warming Concerns, but Alternatives with Lower GWP Values May Provide Solutions to Meet These Challenges. (Page 38) Appliance Design - March 2009 - Design Marts (Page 39) Appliance Design - March 2009 - Association Report: AHAM (Page 40) Appliance Design - March 2009 - Advertisers' Index (Page 41) Appliance Design - March 2009 - Advertisers' Index (Page Cover4)
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