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How do you connect the 12 motor leads to a 3- phase supply?
The 12 lead motor is a very versatile motor and can be connected in numerous ways. It is a dual speed motor and can be wired as star delta. If you are interested, start a Discussion Page and I will see if I can help you.
How do you make a 9 wire three phase motor into a three speed motor?
You don't.
If a three phase induction motor runs at a speed greater than synchronous speed?
When an induction motor is pushed over synchronous speed it will become a generator and will deliver power back to the utility.
What are the disadvantages of a three phase induction motor?
The primary disadvantage of the three phase induction motor is that speed control is a challenge. But new technology in the form of VFDs (variable speed drives) is now rectifying this situation very effectively. Another disadvantage is that single phase power is common while three phase power is less commonly available.
How to change the speed of a three phase motor?
A typical 2 speed three phase motor will have 6 leads on the motor windings which will require 3 contactors to incorperate both the "high" and the "low" speeps. Inorder for the motor to run on "low" speed you need to have a contactor (c1) that pulls in for the L1, L2,L3 leads... that should achieve the "low" speed of the motor.. To achieve the "high" speed you will need a contactor (c2) to shun or short L1,L2,L3 together... and another contactor (c3) to pull in the L4,L5,L6 leads... to recap ... Low speed will requrie c1= L1,L2,L3 powered by phase 1, phase 2, phase 3 of the primary source voltage. High speed requires c2 to short or shun L1,L2,L3 together while c3= L4,L5,L6 to be powered by Phase 1, Phase 2, Phase 3 fo the primary source voltages. Be sure to check for proper rotation of the motor and by reversing any 2 leads of the primary source voltage you will change the rotation for the motor. This can also be done using two contactors by having L1,L2,L3 connected to the first contactor and also the additional contacts mounted on top of the second contactor. L4,L5,L6 are connected to the second contactor. The important thing to remember is to use an interlock which fits into both contactors when they are clipped together. This stops both contactors operating at the same time!!! ( the additional contacts mount on top of a contactor and are mechanically connected to it so that they act together)
Single phase motor speed is determined by the?
frequency of the power supply it is connected to. The speed of a single phase motor is directly related to the frequency of the alternating current (AC) power supply. As the frequency of the power supply changes, the speed of the motor will also change.
What happens to the speed of a three phase motor if frequency is increased?
If the frequency supplied to a three-phase motor is increased, the motor speed will also increase following the relationship known as the synchronous speed. This increase in frequency will lead to a corresponding increase in motor speed, assuming that the load on the motor remains constant.
How do you connect the 12 motor leads to a 3- phase supply?
The 12 lead motor is a very versatile motor and can be connected in numerous ways. It is a dual speed motor and can be wired as star delta. If you are interested, start a Discussion Page and I will see if I can help you.
How do you make a 9 wire three phase motor into a three speed motor?
You don't.
How many speeds does a three phase motor have with ten leads?
Three phase motors only have only one or two speeds. This is done by the coils that are situated around the stator of the motor. When these individual coil ends are brought out of the stator and into the motor's junction box they can be connected in a manor as to what speed and direction you want the armature to turn.
What does no load speed on a electric motor mean?
Generally a motor drives some equipment, it could be a fan, or a pump, connected to motor's shaft. The speed of the motor when no equipment is connected to its shaft is known as no load speed.
How do you reduce the speed of a 15 kW 3 phase motor without using variable speed control?
If the load is connected to the motor via belts, you can change the speed the load is turning by changing the pulley sizes. To get the load to slow down, increase the size of the pulley on the load; to get it to speed up, increase the size of the pulley on the motor. To reduce the speed of the motor itself, you'll have to alter the line frequency, which you can't do without a variable frequency drive attached to the motor.
Can a DC series motor with speed control be connected on AC supply?
A dc series motor with speed control can be connected on ac supply because dc machines are totally reversible.
Can 3 phase induction motor work when one phase is failed?
yes the motor will rotate but less then the rated speed and more heat will be desipated
How do you start a single phase slip ring induction motor?
a single phase motor must have at least 4 poles one set is connected to the line the other is connected in series thru a capacitor or inductor to shift phase and set up a rotating magnetic field the rotor usually has a squirrel cage that will start turning the slip rings can have different purposes depending on how the rotor is wound if the highest rpm of the motor is a multiple of the line frequency 3600RPM for 60Hz 2 pole you apply dc to the winding to make it synchronous. if the hi speed of the motor is 3470RPM the squirrel cage is weak and you must short the rings to get up to the high speed there is beauty in this in that if you vary the resistance from short to open it will be a variable speed motor
Speed control of motor using SCR?
An SCR chip is commonly used to control the speed of a motor. The speed is controlled using an AC circuit and phase angles.
Does the speed of a split phase motor change apporeclably with a change in the applied voltage?
no
