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UPS Power Backup for Small Appliances: Features and Functions!

Learn about the features and functions of UPS power backup for small power consumption appliances such as PCs and space heaters. This article discusses the expertise and experience of Team 5, including Kimberly-Clark and General Motors, in power and electromagnetics.

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UPS Power Backup for Small Appliances: Features and Functions!

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  1. The UPSTeam 5

  2. Team 5: Staff • Michael Myers • Fernando Muñoz • Jesus Lopez • Adam Bitter • Jake Koturbo • BSEE • BSEE • BSEE • BSEE • BSEE

  3. Team 5: Expertise & Experience • Michael Myers • Fernando Muñoz • Jesus Lopez • Adam Bitter • Jake Kotrba • Expertise: Power and Electromagnetics Experience: Kimberly-Clark, General Motors • Expertise: Power, Motors Experience: Airforce electrician • Expertise: Controls, Power Experience: We energies, Gossen Corporation • Expertise: Controls Experience: N/A • Expertise: Power, Motors Experience: Chicago-Kenosha Building Developement

  4. The UPS Power backup for small power consumption appliances: features and functions!!!!!! • PCs • Space heaters • Elaborate more

  5. Vac Sensor Jake AC + Switch Jesus Main Switch Jesus Load Display Jesus CPU Adam Quick Charger Fernando Trickle Charger Fernando Inverter Mike + + + + Battery Fernando Vdc Sensor Jake Idc Sensor Jake

  6. Performance Requirements • Input AC Voltage: 105-132 V • Input AC Current: max 15 A • Input AC Frequency: 60Hz +/- 3Hz • Output AC Voltage: 105-132 V • Output AC Current: max 15 A • Output AC Frequency: 60Hz +/- 3Hz • Battery Size: 12V battery • Battery Life: 1 hour • Digital Functions: User display refreshed every 1/10 sec, monitoring and display input AC • User Interface: LEDs indicator, push pad • Power Mode: On/Off manual switch • Sensory: Current, Voltage and Frequency • Mounting: Feet • Plug: Type B

  7. Standard Requirements • Operating Range: -15 -- 50ºC • Max Operating Relative Humidity: 95% • Operating Pressure Range: 1 atm +/- 15% • Max Storage Duration: 10 years • Energy Sources: AC, automotive battery • Source connections: AC utility and DC battery • Power Consumption: 5200 Watt hours per year • Max Volume: 40000 cm3 • Max Weight: 14 kg

  8. Project Plan

  9. Vac Sensor Jake AC + Switch Jesus Main Switch Jesus Load User Interface Jesus + CPU Adam Quick Charger Fernando Trickle Charger Fernando Inverter Mike + + + + Battery Fernando Vdc Sensor Jake Idc Sensor Jake

  10. Name: Michael MyersMajor: Electrical engineeringTeam 5: UPSAssignment: block 1 Block 1: Inverter

  11. AC Vac Sensor Jake + Charging Switch Jesus Power Source Switch Jesus Load User Interface Jesus + CPU Adam Quick Charger Fernando Trickle Charger Fernando Inverter Mike + + Battery Fernando Vdc Sensor Jake Idc Sensor Jake

  12. Inverter Once the power fluctuates outside the boundaries a control switch will allow the inverter power to transfer to the circuit.

  13. Power Inverter • The job of this inverter is to transfer 12Vdc to 120Vac. • This device will always be on • Control switch will allow inverter power to flow

  14. Signal Table • Analog and digital interfacing – N/A

  15. Prototyping Plan

  16. DFM

  17. Inverter Block Diagram Timing Unit 57-63 HZ Transistor switching Transformer Out to Load DC input 12-15 VDC

  18. Schematic Diagram

  19. Functionality Simulation Supposed to be -12<=V<=12 before Transformed to -120<V<120 This is the desired output not Yet achieved Due to Pspice limitations, a worst Case scenario was not able to be Obtained.

  20. Bill of Materials

  21. Name: Fernando MuñozMajor: Electrical engineering Team 5: UPSAssignment: Power Block Block 2a: Charger (Rectifier) Block 2b: Battery

  22. Vac Sensor Jake + Charging Switch Power Source Switch Load User Interface Jesus + CPU Adam Quick Charger Fernando Trickle Charger Fernando Inverter Mike + + Battery Fernando Vdc Sensor Jake Idc Sensor Jake

  23. Main Purpose • Keep a constant charge in the battery so when commercial power is lost, the device to which the UPS is connected to stays on for about a half hour or until the battery drains completely. • Provide 5 VDC logic to the CPU which power s all essential controls and sensors.

  24. Power Inputs and Outputs • Transformer Input : 120 VAC / 20Amp • Transformer Output / Rectifier Input : 15.7 VAC (Step Down) • Rectifier Output #1 : 14.3 VDC • Rectifier Output #2 : 5 VDC

  25. Power Electrical Interface Signals

  26. Block diagram of Power Supply System 120 VAC Main Input Transformer Rectification Smoothing Regulation 14.3 / 5 VDC Regulated output 14.3 VDC With Ripple 15.7 VAC 14.3 VDC

  27. 5 VDC Power Regulated System

  28. Prototyping Plan

  29. Functionality Simulations

  30. Transient Response

  31. Maximum WV for Capacitors • Referencing to the manufacturer (Digikey) specification the following value was chosen as WV. • 470uF Capacitor: • WV : 10VDC • Leakage Current: 235uA • Ripple Current: 570mA • Dimensions: 32(L)*10.3(D)*0.8(d) mm

  32. Power Ratings • Diodes: P = V*I P = (16V)*(2A) = 32W • Resistors: They were only placed in Pspice simulation in order to have the transformer work properly and give accurate results.

  33. Capacitor Tolerance • This Solid Axial 470uF Capacitor has a range of small long life (20000H). • Tolerance±20% and ±10% on request • Usable Temperature range:-80oC to +125oC

  34. Off Board Connectors • Battery Post: To achieve a mechanically secure and tight connection we’ll be using adjustable clamps. • Transformer: It will be sitting on a hard surface at the bottom of the UPS, we’ll use flat pin connectors to connect wires going to the rectifier. • DC to DC Connector: Flat pin connectors.

  35. Charge Type • Trickle Charge : Constantly supplies the battery with 14.3 VDC at 2 Amps. • Logic Charge : Constant +5 VDC converted from the 12 VDC coming out of the battery, this will power CPU, sensors and interface.

  36. Bill of Materials

  37. Name:Jesus LopezMajor:Electrical engineeringTeam 5:UPSAssignment:blocks 3 and 4Block 3:Switching GearBlock 4:Display

  38. Switching Gear The switching for this project will be effectuated by a solid state relay. • Main switch. • Charging switch. Note: other switches may be needed for different. Blocks.

  39. AC Vac Sensor Jake + Charging Switch Jesus Main Switch Jesus Load User Interface Jesus + CPU Adam Quick Charger Fernando Trickle Charger Fernando Inverter Mike + + Battery Fernando Vdc Sensor Jake Idc Sensor Jake

  40. Switching Gear Sub-Blocks • Main Switch • Charging Switch Note: switch elimination

  41. From the Utility Main Switch To the load From the inverter Charging Switch To the rectifier From the utility

  42. Main Switch • Selects utility or battery. • CPU control.

  43. Main Switch Nominal Ratings Control Input : 6 Vdc Input: 120 Vac Output: 25 A

  44. Charging Switch • Battery Charging • CPU control

  45. Switch Nominal Ratings Control Input : 5 Vdc Input: 120 Vac Output: 30 A

  46. Main Switch Signal Table

  47. Charging Switch Signal Table

  48. Switching Key Components • SPDT switch • SPST switch Note: zero cross switch application & phase lock loop

  49. Switches Bill of Materials

  50. Switching Gear DFM Plan

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