Siemens High Low Voltage AC Motor

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Siemens High Low Voltage AC Motor

Q:Which type of electric motors are more powerful a.c or d.c?: AC motors can convert more power per unit of mass and more power per unit of volume. In a DC motor, almost all of the input electrical power must pass through the commutator. The commutator adds size and weight and reduces efficiency. The design of the rotor windings also requires more copper and reduces efficiency. Lower efficiency means increased heat requiring a larger motor. In the case of a brushless DC motor, there are permanent magnets in the rotor making it more like an AC motor and possibly somewhat more powerful than an AC motor of equal physical size and mass. In addition, AC motors can be manufactured in power ratings that are not possible with DC motors. The commutator limits the maximum voltage and current. AC motors can operate at higher voltages. An AC motor has been manufactured for 101,000 kW (135,000 Hp). It has two 12,500 volt, 3-phase stator windings.

Q:I want to put a quot;dimmer switchquot; (like the kind you put instead of a light switch to control how much electricity the circuit gets) before an AC motor running on 120 volts. Basically, we needed a motor for a project and it has a switch already on it for 2 different speeds of 600rpm or 1200 rpm (It was from a rather large industrial fan). I need it to spin slower and i was wondering if it will damage the motor to give it less voltage with the variable switch, or if the motor will run at all.Thanks in advance: I don't know about this specific motor, but in general AC motor speed is a function of the number of poles and the frequency. Thus lowering the voltage, by itself will not reduce the speed although you may see it moving slower because of the load. In these circumstances you are effectively slowing it down by overloading it and it will heat up accordingly. DC motors are a different beast and you can control their speed by voltage. Further, a dimmer switch does not reduce the peak voltage. What it does is chops off part of the AC waveform. Fundamentally, although this approach may do what you want, it is not a proper solution and I would not let it run unattended for any length of time. Also, keep a fire extinguisher handy.

Q:Explain why a motor must use a commutator if only DC current is supplied.: an AC motor can operate on oscillating electromagnetic fields which induce currents in coiled wire. DC motors not not operate with such induced fields. Instead they must create therir own oscillating fields in the coils and this is done by rapidly switching the current on and off. This switching is done by means of the comutator and the split electrodes on the shaft...Hope this helps...

Q:What happens to a stator wound AC permanent magnet motor when the rotor is removed but still powered?: If I understand correctly, you are asking what would happen if a permanent magnet motor had the rotor removed, and then was energized?? Without the counter EMF provided by the rotor's magnetic field interacting with the stator's magnetic field, I think you'd end up with a short circuit. Just a guess though.

Q:my friend tells me its really bad for your car or the ac motor or something, is this true?: No it is not bad at all. But why?? Windows open a/c on? would you do that at home? The purpose of air condition is to have your own climate inside your car. If is hot outside just roll the windows and get cool inside your car. To me is just a waste of energy since your engine is using power and fuel to drive the a/c compressor. In some older vehicles you can feel the difference of power and gas mileage right away. But it is your car and your paying for the gas. Have it your way.

Q:fan motor on our ac central unit went out we replaced it but now it wont throw cold air and seems as it wants to cut of or pick up speed .what could it be..: The chilly is produced interior the outdoors unit. if it really is in fact humming, it extremely is why it isn't chilly. it really is one among the contactor relay which makes the major electric powered connection at the same time as the thermostat tells it to. The section expenditures about 25 funds at an electric powered provide shop. Takes about a 1/2 hour for a first-timer to regulate. A 5/16 nut motive force receives rid of the panel, and a flat blade screwdriver receives the wires, if no longer in basic terms the click on connectors. solid success and be effective to exhibit the breaker off on the outdoors unit. it really is 240 volt and could kill you right away.

Q:I made a three axis CNC router with three CD drives. I was going to make a stepper motor controller board for the CNC but I noticed that the motors are NOT servo motors instead they are hobby motors(the motors with two wires) So is there a schematic anyone knows of that controls a hobby motor with a parallel port? I WILL PICK A BEST ANSWER!!! thank you!: If you want this router to work at all you need micro stepping and cheap easy plans don't offer this. The plans that do end up costing a lot in parts so it's better to just buy a kit. If you have money you can get good controllers from rutex and gecko drives.

Q:I'm trying to get some information on how to get an electric motor to run in reverse. I know how to make a low voltage DC motor run in reverse by switching the positive and negative to reverse the current flow. However this won't work when I try it on a 120 volt Ac motor. Is there a special switch I need to install or is their a special motor needed for this application. Thanks ( Lee ): You need to use a series motor like the one using for AC power drill. Reverse either the rotor winding or field winding shall make it rotate in opposite direction.

Q:Which is better, alternating current tubular motor and direct current tubular motor?: The alternator is concerned, it can realize the direct energy feedback to the grid (but must ensure 4 conditions: the same voltage amplitude, phase and phase sequence of the same, the same frequency); but the DC generator power is required to process the alternating current into the inverter (DC said rectifier, the DC the process that converts the AC inverter), to feedback to the grid. So it also needs to increase the power of the inverter.

Q:Well our AC motor broke and we are stuck in this hot house -3- i aas wondering how can i stay cool?: There are many ways to keep cool when your a/c is off. Take a cool shower and drip dry. Stand in front of a fan while wet (or dry). Retreat to your basement: usually the coolest spot in the house. Suck on ice cubes. Lowering your internal body temperature will make you feel cooler. If all else fails, go to the mall or someplace cool.

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