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Can I use a normal UK mains 240v /12v transformer to power a 12V 150 watt golf trolley motor. (on workbench )? |
Bizarre though it may sound, I am building a Christmas Window Display for my partner's art gallery. It will feature penguins sking down a snow slope (that's the easy bit) and then carried back to the top on a ski lift (that's the harder part). I have a 12v 130 Watt golf trolly motor and axel that I plan to use to power the ski lift. I could power it with a trolley battery which I would have to re-charge from time to time, but would prefer to use a standard mains 120 v to 12 v transformer, I have one that powers 12V lighting. Does this sound reasonable or will it be incompatible with the motor ? Thanks You could power this motor easily with a 12 volt transformer. Being 130 watts, you would need a transformer with a rating of at least 15 amp to power this. By using ohms law, watts-volts i get 10.83 amps ,So the Maplin transformers would be too weak. I would opt for a 20 amp transformer that you would be able to get in a ham radio shop ,These are capable of producing heavy DC current for long periods without problems as they have a built in fan.,Heat being the main problem. Well you got the voltage but you need to know what amperage or power/ watts the transformer can handle if it is not to over heat. I would just try it and see if the load of shifting the penguins pulls too much current and things slow down or stop and then you'll know if you are looking for a higher rated transformer. Good luck! only one way to find out. give it a try and see what happens. 13路8V Regulated Mains Power Unit from Maplin Electronics The 10A model should be adequate (拢19.99 +拢2.50 P&P), click link below to view and buy on line: http://www.maplin.co.uk/module.aspx?modu... A range of four power units with a fixed 13.8V output, ideally suited for powering CB radios, communications transceivers and other devices that require a 13.8V supply. The power supplies are available in 3A, 5A, 7A and 10A versions (50% duty cycle rated output current). All four power supply units are finished in a smart black steel enclosure, with illuminated rocker-type on/off switch and two binding posts (black and red) for the 13.8V output. A mains protection fuse is housed in a fuse holder on the rear panel. The power supplies have short-term overload and short-circuit protection to guard against momentary accidental misconnection, but the units can be damaged by prolonged abuse. Please note these power supplies are designed for use in well ventilated areas. Try using a smaller motor suitable for models, also available at Maplin - check their range: http://www.maplin.co.uk/module.aspx?tabi... A comprehensive range of large (35mm without shroud) metal motors with integral gearboxes. Designed to meet the needs of industrial, modelling, R&D, educational and hobbyist applications. These motorgearboxes boast a powerful high quality three pole motor with sintered bronze bearings. The all-steel gearbox incorporates bronze output bearings, enabling the high torque transfer from the motor to be transmitted through the gearbox. The unit is mounted on a 1mm thick plated steel bracket and has with an offset 6mm diameter output shaft. http://www.maplin.co.uk/module.aspx?modu... http://www.maplin.co.uk/ http://www.maplin.co.uk/module.aspx?tabi... I think you will have trouble trying to power a DC motor from an AC transformer!!! It will likely buzz like hell and not go round - could overheat and burn out. At the very least you will need a rectifier - you can make a bridge rectifier easily or buy one. Perhaps you could use a battery charger to trickle charge your battery? 150 w = 12.5 amps at 12 V, but you may not need this much power (0.2 horsepower). Is it 150 or 130 watt anyway? You will have to do the maths to work out the power you need - depends on the weight to be lifted and the distance + frictional losses, especially in the gearbox of the motor. A watt is one joule per second. A joule is the amount of enery needed to lift an object weighing 1 kg by a height of 10 cm (approx). So one watt will lift one kilogram by ten cm every second. This should help you to work out the power you will need. Remember that whatever the rating of the motor, it will only consume the power needed for the work it has to do. |
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