(Manual Charger cum Exerciser) COMPACT PEDAL OPERATED BATTERY CHARGER AND EXERCISER Atanu Maity EDG, CMERI In remote areas, hilly regions, strategic location, border areas (army deployment), Islands etc. generation of power is scanty if not nil. In these situations a Small Manual Battery Charging Unit would be of great help to provide power supply to battery chargers or battery operated gadgets like mobile phone, communication devices, radio, lamp, fan, TV etc. This product was conceived while studying various means to charge the batteries of an energy efficient lamp. The present design relates to very compact and easily portable power-generating unit, which besides being used as a power generator can also be used as cycle exerciser. The power-generating unit is pedal operated. It serves dual purpose of power generation and helping the person to maintain physical fitness through exercise of muscles of legs and lower torso. The force applied to the pedals gets transmitted to the rotor unit of power generating device through chain-sprocket and gear train. The sizes of sprockets and gears are so chosen to achieve suitable rotating speed of the rotor for power generation. The shape and size of rotor is chosen to act as a flywheel and impart suitable moment of inertia. The electrical power so produced can be fed to a rectifier unit and plurality of electrical connectors in the rectifier unit provides electrical power to various electrical devices. As per the suitability of individual user the height of the present design can be adjusted. The design enables hands free operation and simultaneously the user can engage himself in other activities like reading, watching TV etc. The user can relax intermittently without stopping the motion of the rotor unit abruptly. Design Considerations Accordingly the present invention provides a compact, easily portable pedal operated power generating system, which besides being used as a power generator can also be used as cycle exerciser so compact to enable hands free operation and letting the user relax intermittently and simultaneously engage himself/herself in other activities like reading, watching TV etc. while the electrical power so produced can be supplied to various electrical devices. Innovative Features of this equipment: • Compact and Portable. • Utility of a Pedal Exerciser. The problems with the existing pedal operated power generating systems are either they are not compact, light and easily carry able or lacking in utility of a pedal exerciser. This is a very compact and easily portable power-generating unit, which besides being used as a power generator can also be used as cycle exerciser. The power-generating unit is operated by pedal. The Figure below represents the usage of the compact 1 A. Maity, EDG, CMERI 02 01 ȹº»Ç¾¿Á The shape and size of rotor is chosen to act as a flywheel as well and impart suitable moment of inertia. As per the suitability of individual user the height of the present invention can be adjusted.(Manual Charger cum Exerciser) pedal operated power generator in which (01) is the compact pedal operated power generator. The sizes of sprockets and gears are so chosen to achieve suitable rotating speed of the rotor for power generation. CMERI . (02) is the rectifier unit. connected to different electrical devices that can be plugged into the rectifier. gear and pinion from the pedal unit so that the user can give rest to his legs without abruptly stopping the rotation of the electrical power-generating unit. EDG.e. It serves dual purpose of power generation and helping the person to maintain physical fitness through exercise of muscles of legs and lower torso. The force applied to the pedals gets transmitted to the rotor unit of power generating device through chain-sprocket and gear train. The rectifier unit provides electrical power to various electrical devices or to rechargeable batteries for recharging. 2 A. Maity. The electrical power so produced then fed to a rectifier unit. Freewheel sprocket was used to detach the rest of the power train i. EMF constant of the power-generating unit is 20mV/rpm. EMF Constant Operating Speed Terminal Resistance Dimension (LxWxH) Weight 20mV/rpm 1000rpm 6Ω 450x 100x 320 5 Kg.(Manual Charger cum Exerciser) Validation & Trial Terminal resistance of the stator unit is 5. Maity. 3 A. 5.8Ω. 4. CMERI . 3. EDG. 2. Charger Characteristics Curve 25 20 15 V 10 5 0 0 200 400 600 RPM 800 1000 1200 Data Sheet 1. The power generated at 1000RPM of rotor is 9Watt.