Siemens EX Series Motor

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Siemens EX Series Motor

Q: How do I change the speed of the motor?: There are several schemes. The 1. is to change the ratio of the mechanical driving wheel and driven wheel driven by the motor. The 2. is to use mechanical transmission to change the speed of the motor. 3. is to use electronic governor to change the speed of the motor. As for which scheme to use, it depends on your environment.

Q: Distinct Between Synchronous Asynchronous Alternators AC Motors: Definition Of Synchronous

Q: can u provide me the general equation for servo motor? thanks: If you are using a DC motor, it will be shunt or compound, not series wound, because you have to have a fine control of the rpm. Any motor can be converted into a servo motor with a positioning control system. AC motors can also be used. Wound rotor induction motors are the best, because they allow good speed control. For low power applications, such as printers and disk drives, stepper motors are used, which allow very precise position control by counting steps. There is no general equation for a servo motor. Perhaps you are looking for the transfer function of a motor, which normally is first order, with a time constant proportional to the mechanical inertia. rpm(s) / power_in(s) = 1 / (1 + s T) s : Laplace operator T = inertia time constant Inductance time constants are usually neglected. .

Q: Why is it better to use a DC motor rather than a AC motor?: AC motors are lower in cost when used for loads requiring more than 1/2 horsepower. And they are more reliable and easy to maintain. Plus they don't have brushes like DC motors do. They are also smaller in size than DC motors. DC motors are better to use when you need variable speeds because AC motor speed control is more expensive. And DC motors are efficient running at speeds lower than AC motors can.

Q: Is it an universal motor which works on ac or dc voltage,how does it work,speed regulation rheostat foot pedal,I mean can someone explain me technically how a sewing machine motor works,and how to connect it back after rewinding,thank you.: Yes it is. The type of motors sewing machines use are electrically noisy.

Q: I want to use the motor from an old lawn edger, which has to be plugged into a wall to work, for a small battery powered skateboard for my son being powered by a car battery. Is this possible without havng to buy a hundred dollar power convertor...can I splice the wires and hook them up directly to a car battery?: IF it's an AC motor - it won't work on DC (battery voltage).

Q: Why is a split phase or capacitor start motor typically not a varialbe speed motor?What would have to be done to operate a split phase or capacitor start motor as a variable speed motor?: most of these motors have a start winding that is disconnected by a centrifugal switch near operating speed. If the desired speed is less than the speed needed to keep the switch open the start winding would then be reconnected and soon burn out. The starting capacitor would most likley burn out first. Shaded pole motors can have multi speeds by varying voltage but are limited to smaller outputs like fans ...The shaded pole motor has many positive features, but it also has several disadvantages. Its low starting torque is typically 25 to 75% of full load torque. It is a high slip motor with running speed 7 to 10% below synchronous speed. Also, it is very inefficient, usually below 20%... at second link Depending on application it may be possible to use a variable speed pully such as the one at the 3rd link (tb woods)

Q: What is the low power factor of AC motor in no-load operation?: First, if it is a single-phase motor, its power factor is equal to the three-phase, then it is low, in this case, the load is unbalanced

Q: I've heard a lot of estimates of how much the battery packs of hybrid or electric cars might be worth, but i'm wondering how much the motor itself might cost. Say the cost of the motor for the upcoming chevy volt and also a similar motor but of much less power maybe 50-70hp as might be found in a small hybrid. Also how much does a comparable 4-cylinder ICE of equal horsepower cost?: nah the motor in the chevy volt would be rated at more hp than a motor in a hybrid cause in a hybrid you have a gasoline engine too so you don't need that strong of an electric motor. as for prices, the motor could be anywhere from $800-1000 or even up in the $1500-$2000 range. it all depends on its specs. an ICE will be more expensive. there are A LOT more moving parts in an engine compared to a motor. an electric motor will run more efficiently, and will require significantly less maintainence because as I said, less parts. infact there is only one moving part in an electric motor. electric motors also have more torque and better torque curves. ICEs usually have their torque and horsepower peak near the high rpm range. but electric motors have torque curves that are almost flat, so you get better acceleration AND more rpms.

Q: i wont to make my slide door to open and close with out use my hand and i wont the electronic map to make itthank for all: The answer is you can't unless the motor is designed to operate in both directions. This is due to the location and connection of the starting coil of the motor. TexMav

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