• Siemens Reducer Gear Motor System 1
  • Siemens Reducer Gear Motor System 2
  • Siemens Reducer Gear Motor System 3
Siemens Reducer Gear Motor

Siemens Reducer Gear Motor

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Q:I have 3kw 3phase AC induction motor which will work at 50deg in crane application. As per mfrs. spec. the max. permissible output power should be 93% of the rated power. Is that mean my motor will deliver 2.79kw at 50deg ambient temperature with rated frequency voltage? If so, then what about the rated current, rated torque starting current ratio? All of them will decrease according to the power? Iam totally confused with the word 'de-grading of the motor'. Pls explain
The rated frequency and voltage do not change. The rated speed is determined by the frequency, so rated speed doesn't change either. Rated power is rated torque multiplied by rated speed, so only the rated torque is reduced to 93% of the normal rating. Current is determined by the actual applied load torque, but reducing the torque by 7% will cause the current to decrease by somewhat less than 7% because the motor has a high no-load current. The current may be something like 35% of rated when there nothing connected to the motor shaft.
Q:Hi, I have a 3 wire AC sensor and a 3 wire AC motor, but I'm not sure on how to connect them to my PLC, which has 2 input cards and 2 output cards. For the sensor, do I connect it like this?:-quot;neutralquot; wire to the quot;commonquot; of one of the output cards -quot;inputquot; wire to an quot;outputquot; of the output card-quot;outputquot; wire of the sensor to an quot;inputquot; of one of the input cardsFor the motor, do I connect it like this?:-quot;linequot; wire to the quot;commonquot; of one of the output cards-quot;CCW (counter-clockwise)quot; wire to an quot;outputquot; of the output card-quot;CW (clockwise)quot; wire to another quot;outputquot; of the output cardThanks for any help on this.
STOP! You do not connect the motor to the output card. A typical connection would be like this... An output fires when instructed. The output controls the coil of a starter. The motor is wired through the starter as appropriate. The motor can draw significant current, beyond what the output card is capable of handling (generally very low current). I assume the motor has 3 wires to make connection easier, it is really a 2 wire motor as only 2 connected wires make it run. So the connection would be the neutral to the neutral in your system, and the correct directional wire through the aforementioned starter, or relay if it is a small motor. What exactly is the sensor you mention? A Proximity sensor? I have to know more about the sensor. Typically the sensor is wired to power and has an output that is wired to the input board. email me for more detailed help.
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:How can direct current drive AC motors?
Originally 24V battery driven 120W motor, want to use alternating current drive, need a AC/DC power.Buy a AC220V/DC24V 10A (big, expensive, how many, but safe) switching power supply.If you do it yourself, buy a 220V/12V 150-200W transformer, a 10A rectifier bridge, a heat sink, and a few 50V4700uF filter capacitors. Transformer voltage transformer to 12V, rectifier, filter, DC 24V.
Q:What will happen when we give more voltage but same power into an AC motor ?Can we calculate the RPM and TORQUE that the 1Kw AC motor will produce when we give it ( input ) :1. 200 VAC 5.0 Ampere2. 400 VAC 2.5 AmpereWhich input will make the faster RPM ?Which input will make the stronger TORQUE ?
Also, the mechanical design of the motor is probably not designed for such speed. Vibration and put on may reduce the life of the motor with out adequate load to gradual it down. The motor may begin to screech from such vibration and oscillation.
Q:Boyfriend is trying to repair our window AC unit. He says the problem is the fan motor (not the compressor, etc). It'll run and cool the room for a little while (20-30 minutes maybe) and then it will die. We can wait and turn it back on, but it always dies after a little while. What exactly could be wrong with the fan motor?
The most likely cause is overheating which causes the internal overload of the motor to open. This could be because the bearings are worn and seizing or it could be because of a problem with the incoming power. If the voltage is lower than normal, the motor will draw more current (amperes) than it is designed for which creates more heat than the motor can operate with. Check the voltage source. If the voltage is okay, check to see if you have oil ports on the motor for the bearings. A few drops of machine grade oil can be applied. The bearing may be too worn, in which case the motor will need to be replaced. The motor may also have a bad start winding. Normally, a motor will not have enough torque to rotate correctly without a good start winding. It will still attempt to rotate on just the run winding, but it will draw more current and that will overheat the motor. Depends on the type of motor.
Q:How to judge the quality of three-phase AC motor?
1, appearance inspection2, respectively measuring U1U2, V1V2, W1W2 resistance, three-phase resistance value should be equal, three-phase maximum difference should not exceed 2% of the average value3, if you use a multimeter, it's almost equal4. Monitor the current and motor temperature after idle running
Q:What will happen if i supply ac current To a dc motor?
That depends on the type of DC motor. Some are called 'universal' motors and will run on both AC and DC. Permanent magnet motors tend to just vibrate.
Q:I know many AC motors don't have brushes but there are some that have brushes. How do you call that type of motor? Thanks!
There is such thing as a brushless motor!. Although i think they are only DC motors that are brushless and used in things like your desktop pc as cooling fans
Q:Braking principle of 220V alternating current motor
LZ is trying to understand the principle of an ordinary two-phase AC motor? The function of an electric motor is to convert electrical energy into mechanical energy. Motor is divided into alternating current motor and direct current motor two major categories.

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