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Re: Resistive heater operating on different voltage ... Anther Answer C: There is a voltage opposing the applied voltage proportional to the rotational speed of the motor. Most Electrical Engineers prefer answer
Re: Resistive heater operating on different voltage Locked Rotor Amps v Running Amps http://franklinaid.com/tag/locked-rotor-amps/ ... Locked Rotor Amps v Running Amps
Re: Resistive heater operating on different voltage So let me try to understand this out loud. Given 1 : electric motors consume more current during start up. Given 2 | electric motors consume less current once
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Re: cleaning a PCB? ... Repeating the warning about solvents in general: Be careful with anything stronger than soap and water. Acetone attacks acrylic (plexiglas, perspex),
Re: Choosing a suitable capacity power supply for a motor At the moment I have a winding resistance of 2 ohms on my 12v motor so the load is guaranteed to be 6A max on startup. I am using a junk store 12V 15A rated
Re: Vein imaging ... That seems reasonable based on my knowledge of: http://en.wikipedia.org/wiki/Pulse_oximetry This is interesting to me, as it includes biology and
Re: Resistive heater operating on different voltage Its really simple, most motors are rated to be just strong enough to move the mechanical load. Price is not just a detail! When the voltage lowers, the motor
Re: Resistive heater operating on different voltage As already pointed out, if the same heaters (in the same configuration!) are used, approximately half the heat will be generated. But if there was some form of
Re: Choosing a suitable capacity power supply for a motor To stop dips and peaks when starting and stopping, you need a big reservoir cap across the supply.....it will help your SMPS to live even longer!!! -- Regards
Re: Resistive heater operating on different voltage I think you meant that the voltage is the same polarity, + to +, - to -. Steve Greenfield AE7HD
Re: Resistive heater operating on different voltage The motor doesn't develope the 'counter emf' until it is spinning. the counter emf is voltage opposite polarity to the incoming voltage and reduces the
Re: cleaning a PCB? ... Thanks for the tip. Good news is this PCB is really really simple. Just 6 resistors so nothing really to worry about. -- Aaron Turner http://synfin.net/
Re: Resistive heater operating on different voltage Hi Jong, My understanding (little) on motors is that they draw much current at start, because as it is not yet spinning there is no counter electromotive
Re: Resistive heater operating on different voltage Dave, I think you were thinking of when there's brown outs in a city - and the brown out (lowered voltage) causes damages to components like refrigerator
Re: cleaning a PCB? Hi, ... I wouldn't be so quick. Before using any chemical, you need to figure out the chemical compliance - that is, what it's going to do to whatever you're
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Re: Resistive heater operating on different voltage Thank you guys for the reminder of the basics. I seemed to have glossed over those. Dave [red face]
Re: cleaning a PCB? Slow down cowboy!!! Actually I was surprised that some of the nail polish removers are no longer acetone!!!! Yup !!!! So what was I sniffing for the last 20
Re: cleaning a PCB? Aaron, Speaking from a professional prospective, I suggest using acetone since its safe and effective on the components plus it easily evaporates at room
Re: Cleaning an Electronic Componet Likely it was MEK. Its widely used in industrial settings, and you can buy it at hardware stores. As a kid I worked in a factory making freezers, we once
Re: cleaning a PCB? Acetone all the way! Pick up a bottle of nail polish remover. And a very soft brush then go to work. On Wednesday, December 4, 2013 12:10 PM, delton maclealy
Re: Resistive heater operating on different voltage Not only that, but element won't reach the temperature it did with 220. Is there anything else to this circuit? Is there provision for operating at a different
Re: Resistive heater operating on different voltage Dave, I'm not sure if I'm understanding this statement correctly ? Ohm's law says : V = I * R Given R is constant (more or less), when V drops so does
Re: Resistive heater operating on different voltage ... When the plant switched the operating voltage from 220 VAC to 120 VAC for the heating elements were new heating elements installed to produce the same
Resistive heater operating on different voltage A printing press uses a thermal process for ôprintingö metal foil onto paper medium. This involves a plate with resistive heating elements inside. This
Re: Choosing a suitable capacity power supply for a motor ... A full wave rectified AC voltage with a peak value of 17 volts will have a DC value of 17 times 2 / pi or 17 times 0.64. Hence the DC value of your full
Re: Choosing a suitable capacity power supply for a motor ... There's no reason not to use a hefty diode - maybe 10A. Although, see below ... I think the motor will be just fine with full wave rectified DC and no
Re: Choosing a suitable capacity power supply for a motor Sorry, have a few more questions.. Regarding my 12V DC 3A motor, the static resistance is 2 ohm so I presume the maximum current it can take on startup is 6A
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Re: Cleaning an Electronic Componet ...except in California. Here the legislature is going to save us all from everything. James "Jim" M. Geidl, K6JMG D.B. Cooper, you have a message. ... From:
James M. Geidl
Re: Cleaning an Electronic Componet ... MEK is readily available at any hardware store. It is quite similar to Acetone which is also readily available. Both are good solvents.
Re: Cleaning an Electronic Componet ... It was trichloroethylene (TCE). It is considered a very hazardous substance and replaced by trichloroethane (TCA).
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