Siemens Original 1PQ Series AC Motor

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Siemens Original 1PQ Series AC Motor

Q: Regarding electric motors with armatures and commutators and all that. With a split-ring commutator, it switches the direction of the current in a DC motor so that the armature can make full revolutions. So, if you take out the split-ring commutator, does that turn it into AC? And AC, by definition, changes current direction every half-turn, so why wouldn't AC make full revolutions too? Confusing..: yes, split ring makes it AC and half-turn refers to when you get to half a turn now the half of the ring that was connected to positive is going to be connected to negative so a switch occurs every half-turn, not actual physical turning of the part. Inside an AC motor, there is a coil and a magnetic field that turns it and it is very much the reverse of half ring. If you take out the half ring nothing can physically turn, but of course the force to turn is still there. You sound badly confused about it, you have to look at Lorentz force on a wire in a magnetic field, and you will see how depending on the direction of current, the wire is pushed up or down, because it is connected in a loop, it goes in a circle, half-way through, if the current direction doesn't change it will want to go back the opposite direction that it came from, but since the direction of the current changes thanks to the half ring, it will continue going in the same direction and makes a full round.

Q: where are ac motors used at today?: Everywhere that the voltage supply is AC - and that's pretty much everywhere there's an electrical outlet.

Q: simple question all i want to know is what a ac motor is and how it functions?: The most common type of AC motor is the 'Squirrel Cage' motor. This has what appears to be a solid rotor, but is actually copper or aluminium bars embedded in steel. The electricity rotates around these bars, producing a rotating magnetic field,which pulls the bars, and so the rotor, around with the field. The power supply needs to be more than 1 phase, but a single phase supply can fool the motor into thinking it is 2 phases, by using a capacitor connected in series with one set of the motor windings.

Q: now i am using one dc 130 bhp motor for my crane. i want to change the motor to ac type, so what should be ac motor hp that equal to 130 hp dc motor.: A horsepower is a horsepower. It is defined as 550 foot-pounds per second, exactly equal to 746 watts. A bhp is a horsepower. Nobody has any idea where the 'b' came from or what it means. Back in 1962 I witnessed an argument that went on for over an hour in a college dorm, one side saying it stood for brake horsepower and the other insisting it meant blown horsepower, and neither side knowing exactly what those terms meant either.

Q: Can the speed and torque of three-phase asynchronous AC motor be controlled at the same time?: More than 50HZ constant voltage, constant power, but the speed increases at the expense of torque, the above formula N becomes the working speed of the motor, such as 5.5KW 4P-50HZ, at 1000 rpm, torque = 9550 * 5.5/1500=35N.M at 2000 rpm. Torque = 9550 * 5.5/2000=26.2N.M

Q: What if on third rail, instead of DC there was AC? Would it affect the train somehow? Would it save money?: Changing every motor in every car does not sound like a way to save money.

Q: i want motor specification which will meet this requirement ..plz help me: changing the revs in an ac motor requires you to change the frequency of the supply. revs = number of 120 x frequency / poles. thus a two pole machine on 50 hz will rotate at 3000 rpm. thus a variable speed drive is required.

Q: Main structure of AC motor: An electric motor consists of two basic parts: stator: Base: usually made of cast iron or cast steel. The utility model is used for fixing the iron core and the stator winding, and the front two rear end covers support the rotor shaft, and the outer surface of the rotor shaft is provided with a radiating rib.

Q: Why is Tesla's Model s electric vehicle using AC motor instead of the more popular frequency conversion DC motor?: 1, the DC motor structure is complex, the cost is relatively high, late maintenance trouble.2, larger motors are required to be connected to large cooling fans.3, it can realize the speed regulation simply and economically. Big torque and good mechanical characteristics.4, AC motor structure is simple, low cost, simple maintenance. You can't speed it yourself. In the past, the frequency conversion was not timely, and the DC motor was used in places requiring good speed control (machine tools, cranes, textiles, etc.).

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