Siemens Reducer

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Siemens Reducer

Q:i need help with a school project. im in high school.: Yes and no. Yes, the theory of magnetic interference is true. However, the electrical coil serves as magnetic shielding, so the penetration of the interfering field is minimal. The global field of the earth is very minimal. As far as magnetic interference from other motors in the area, this is more valid than the global interference argument, but the field generated OUTSIDE of a solenoid coil is very weak compared to that INSIDE the coil. That said, issues can arise if you have forces exerted on the motor or other parts of the drive by a strong field. Strong magnetic fields can generate forces against shafts, gears, and bearings that can be mechanically damaging and cause excessive wear. Typically areas that have strong magnetic radiation are classified, if you've got a deviant field somewhere that is exposed for no good reason, throw up some shielding. OSHA said so. The difference for your AC vs DC motors... A DC motor can potentially be driven by a strong magnetic field (1 in a million odds to get the right induction) an AC couldn't. An unshielded DC motor would possibly exhibit a strong reactoin than an AC motor, but either event is pretty unlikely. Bottom line, if a motor is operating in a strong magnetic field, shield it and you'll have no problems. PS... Simple Mag shielding basically consists of metallic mesh screens. As the mag field penetrates the mesh, essential tries to induce a current and the field is bent around the individual wires, breaking up the field.

Q:what should i do to make it really fast?use more magnets? how do i reduce friction?how many coils?thanks!!!!: Welcome to the the World of Electric Motors. How to Builda 2 Amp Motor, a step at a time. Coiling, position of Magnet (Type of Magnets), choice of Bushing and bearings, all play a integral part of making either a High torque or in this case RPM motor. Assuming that you are operating a DC Motor, (AC Motor, don't usually use magnets, but there are some out there) Start with Basic Design Link 1. - Answer you question about number of magnet (More accurately the Magnet strength) - And the Number of Coils Request for Speed Link 2. Summary For Speed, usually requires a lot of coils, generating a rapidly changing field, expect a few armature and alot of sections of magnets. Note 2 Ampere is al lot of current, and can easily harm any careless person. Check several time, visually and with the proper equipment before energizing the equipment. Friction reduction is a complete science by itself. If it is a School project, consider Dry type of Lub such as Graphite Carbon. As the running duration is short. (tens of minutes runs, with long period of down time that allow inspection) If it need a longer running time is expect, consider commercial grade stuff, such as Air bearings.

Q:i plan to put AC drive in crane motors that are currently slip ring motors, since ac drives are made for squirral cage induction motors we can short the rotor terminals and put them? Is there any category of special carne duty ac drives ?: Variable frequency drives VFDs) can be connected to slip ring induction motors with shorted rotor terminals. Because of ringing voltage transients that occur at the waveform switching transition points, VFDs cause voltage stresses on the motor insulation. Motors rated for VFD use are recommended, but older motors can be used. Output reactors or dv/dt filters are recommended for use with older motors. Most VFD suppliers can provide detailed recommendations. Many suppliers have experience with crane retrofits and can provide information and VFD features for coordinating the VFD operation with friction brake controls etc.

Q:My motor draws 24VDC / 5A and runs off a lead acid battery. If I input 120VAC / 15A in a ACgt;DC power supply what does it out have to be to run the motor? I've been told an output of 24VDC / 5A is not enough.: Dear, Thank you, am also fine like you then dear based on application of precision select drive i.e. scr control drive also used but for variable speed drive else put transformer bridge rectifier without use filtering capacitor by put of current limit resistor suitable for 5a its wattage. Use secondary of transformer is 27v,7.5a

Q:Plz provide the answers in points.. I need it for my school seminar assignment.: DC generators 1. Best for charging batteries for electric vehicles and rechargeable batteries in all portable devices. 2. Used to run electric drive motors in industrial machinery because DC motors have easier and more precise speed control than AC motors 3. DC generators used to run traction motors in diesel locomotives. 4. Used to run DC welders for specific kind of welding 5. Used to run electrolysis and electrowinning of metals from solutions. --------------------- AC generators --------------------- 1. Used to generate all of the electricity we use in households and businesses. AC has a lot less line losses than DC so is universally used worldwide to supply electricity 2 Used to run transformers which allow the stepping up or down of voltage and current. DC can't do this. 3. Used to run three phase electric motors which are much cheaper than DC motors and provide more available horsepower per pound of motor over DC. 4. Cheaper per kilowatt-hr and delivery charge of power than DC.

Q:what are windings on electric motor for a ac unit?: Without getting to technical the copper wire wound in the motor case.

Q:solenoids?: Low Power Factor is due to inductive loads. AC has compressor motor fan motor which are inductive loads. Similarly AC solenoids are inductive coils. Hence to correct PF of AC or solenoids, a suitable capacitor may be connected. Ketan K

Q:How to ac motor work?: The motor uses the electricity to make temporary electromagnets. There is a ring of these magnets around the case of the motor, there are some on the rotor, the part that spins. The motor supplies power to one of the magnets around the case also to one of the magnets on the rotor. The two magnets are now attracted to each other, the magnetic power pulls the rotor towards the case magnet. Before it gets to the point that the two magnets are lined-up, it turns the case magnet off switches power to the next case magnet, that is just a bit further away. The magnet on the rotor is now attracted to the next one, the rotor is pulled around a bit further. The motor then switches the power to the magnet that's next around the case, the rotor continues to turn to try get the magnets to line-up. It's a bit more complex then that, but that should give you the general idea.

Q:Their advantages,disadvantages comparison table?: These are terms used in vfd's except FOC, I've no idea what that means. The other terms are not comparable anyway. Try looking at manuals for various manufacturer's vfd's such as ABB, Toshiba, etc

Q:Why are brakes on AC motors normally DC? Is it because they use an elctromagnet and maybe they work better on DC?: The best advise i can offer you is to to check in the electronics mart then if that fails contact the manufacture...

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