Appliance Design - March 2009 - (Page 33) SWITCHES & RELAYS Fig. 5. Vane-interrupt switching Hall sensor. A variation to vane-interrupt switching involves the use of specialized, back-biased Hall-effect devices (commonly referred to as gear-tooth sensors). With these devices, the magnet and Hall sensor are integrated into a single package, reducing placement and alignment concerns and simplifying the design-in process in appliance applications. When a ferrous material passes in front of the integrated sensor and magnet package, the magnetic field is drawn through the active face of the Hall device, actuating the digital output of the sensor. These sensors are primarily used to detect the speed of rotation of the drum in washing machine and clothes dryer applications. In some appliances, the gear-tooth sensor output signal can be used to diagnose drum overload. The number of broken drive belts in the field can be reduced through the use of these sensors, potentially generating substantial savings in warranty costs for appliance manufacturers. Those are just a few examples of how Halleffect technology can improve the performance and reliability of modern appliances. The appropriate Hall sensor for a given application, and associated device datasheets, can be found using the Allegro Selection Guide. < For more information, visit: www.allegromicro.com/en/Products References: G. Pepka. “Position and Level Sensing Using Hall-Effect Sensing Technology.” Allegro MicroSystems technical paper. Sensor Review Journal SR27-1, February 2007. M. Hopkins. “The State of the Art in Hall-Effect Technology and Its Implications for Appliance Design and Development.” Allegro MicroSystems technical paper. IATC, March, 2004. www.applianceDESIGN.com Table 2. Hall-effect sensor selection guide based on device output type. LOW COST Variable Speed Controls For Fans, Blowers, Humidiers, Stoves, Heaters, Whole House Ventilators, Range Hoods, Lamps. . . DIAL-A-TEMP Plug-In 2.5 Amps-120VAC. KBWC-Wall Box Mount 2.5, 5.0, 6.0, 8.0, 10.0, 12.0 & 15.0 Amp models, 120 & 240VAC, 50/60Hz. KBMC-Panel Mount 2.5, 3.0 & 4.0 Amp models, 120 & 240VAC, 50/60Hz. Designed for Shaded Pole, AC/DC and Permanent Split Capacitor (PSC) Motors. Send for complete literature. If it’s not in our catalog, let KB engineers design a custom control for your application. KB Electronics, Inc. 12095 N.W. 39th Street • Coral Springs, FL 33065-2516 954 346-4900 • Fax: 954 346-3377 • Outside FL 800 221-6570 www.kbelectronics.com • Email: info@kbelectronics.com applianceDESIGN AD03084KB.indd 1 March 2009 33 1/24/08 9:48:41 AM http://www.allegromicro.com/en/Products http://www.kbelectronics.com http://www.kbelectronics.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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