Siemens 1LA8 High Low Voltage AC Motor

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Siemens 1LA8 High Low Voltage AC Motor

Q: When an AC motor overheats badly, what is generally the first point or two that it will fail at? And what will be required to remedy the problem?(I see alot of carbonization of the coils in various places.)'m working on bringing an old single phase 120 V, 12 A motor back into operation but I'm a bit new to motor theory and many other things under the sun.I pulled the motor off the table saw it came from, cleaned it up, realigned the extremely misaligned rotor with the stator so it turns easily again BUT it still isn't working, it just sits there and hums it's terrible hum. So obviously the alignment is not the current cause of the motors inability to operate.Thanks for your help!: You could have a phase to ground fault that prevents the motor from starting, which means a rewind or trashing the whole thing, But the most likely thing (at least the one to check first) is your starting capacitor. If that is bad, then current can run through the windings but there will not be a lagging magnetic field in the rotor that the winding magnetic field can push against.

Q: How do I change the speed of the motor?: Three phase asynchronous motor speed formula is: n=60f/p (1-s) 1, do not change the synchronous speed control method. Winding motor speed control, chopper speed regulation, cascade speed regulation, and application of electromagnetic slip clutch, hydraulic coupling, oil film clutch and so on. 2. Change the speed regulation method of synchronous speed. Change the stator pole count of multi speed motor, change the stator voltage and frequency variable frequency speed regulation, there can be no commutation motor speed regulation, etc..

Q: i know the basics of a motor but i dont know about a ac motor: The ac motor requires 2 or more ac lines that are at some fixed phase difference between them. When wired to electromagnets arranged in a circle (called the stator), this creates a rotating magnetic field. The rotor, the rotating part of the motor, is basically a magnet that will follow the rotating field. You can even get an ac motor to work with only one ac line by using a capacitor to create another phase.

Q: just bought an inverter. is it possible to connect a small motor with alternator to the AC generated by the inverter, and then use as a charger to charge the battery connected to the inverter so that as the battery is giving power to the appliances connected to the inverter, the charger is charging the battery thus ensuring that the battery wount go down?: Yes... with the understanding that: You have created a circuit of the power utility, inverter, charger, and battery. In that order. I'm unsure why, however, that you would connect the battery to the inverter. Just make sure that the inverter can do that first. Sometimes there may be alternative voltages on the output of the inverter. If you want an uninterruptible power supply, just keep charging the battery, and don't connect the output of the battery to anything else but appliances designed for your battery.

Q: even an synchronous motor is not a problem..tell me some site: The basic thing is to create that rotating field in the stator. For this the simplest is you need 4 poles placed like a cross, and 2 phases separated by 90 degrees. Wire the poles so the opposite poles help each other, and the two phases are at right angles. You can get the two phases using counters or shift registers etc with amplifiers, or analogue phase shifters, op-amps, using a sine wave source and followed by power amplifiers. Consider stereo audio amplifier. It is better to work with sine waves than square waves, as the field shifts gradually. The rotor could be a basket of copper shorting bars. I think you could do away with the iron in the rotor for a demo motor. The second link also shows a simplified layout for a three phase motor with three poles. The eddy current motor is a simpler one to make. See the link below for a few ideas.

Q: Soybean milk machine AC motor or DC motor is good?: Ethanol is a flammable, volatile colorless transparent liquid at low temperature and atmospheric pressure. It can not be used directly because of its low toxicity and pure liquid;

Q: I am looking for a device that would allow me to control how fast a AC motor spins. I am using a 110v AC motor that came off a air compressor. Can anyone help?: You need an electronic motor speed control. It varies the voltage and the frequency to change the speed. The ratio of voltage to frequency is maintained constant. Do a web search.

Q: I am trying to figure out how to make an bench grinder that has an AC motor with a DC power supply with out buying an expensive inverter. This is for class project and we are on a budget.: This Site Might Help You. RE: How can you convert a AC motor to run on a DC power supply? I am trying to figure out how to make an bench grinder that has an AC motor with a DC power supply with out buying an expensive inverter. This is for class project and we are on a budget.

Q: Or how do I find out? I've been trying my hand at some simple woodworking and I like it. I want a small lathe but don't really want to spend the money on one. I have an old vacuum cleaner that hasn't been used in a long time and I ripped the motor out of it. I'm planning on using this along with maybe some old bicycle wheels or maybe some roller skate bearings to make a small little lathe but I don't know if it turns enough rpms.: There's no way a motor in a vacuum cleaner is going to have the horsepower or torque to turn a lathe. It doesn't have to do with RPMS (in fact, a lathe is going to spin slower than a vacuum cleaner), but with power. I wouldn't go with anything less than 1/2 HP for a lathe, and a vacuum cleaner isn't anywhere near that.

Q: What's the difference between a variable frequency motor and a servo motor?: Then it is servo motor, variable frequency motor and the main difference with the encoder, and then transmitted to the servo motor drive, and then using the control theory, such as gain, adjust time, simply say a servo motor is a closed-loop control system, and quick start, stop, load capacity a variable frequency motor, with these characteristics, also makes the speed, torque, third position control method for high requirement application. 1, servo motor and inverter and working principle of AC motor is basically the same, belong to the AC-DC-AC voltage type motor drive, but the technical requirements of big differences, so there are great differences in the aspects of motor and driver design.

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