What is a 2 pole motor?
A 2 - pole motor is an galvanising motor design where the rotor has two magnetic magnetic pole – one north and one S . 2 - pole motor generally run at mellow speeds because the synchronous speed ( the speed at which the charismatic field of battle rotates ) is determined by the frequency of the AC power provision and the number of pole .
The stator coil ( the stationary part ) of a 2 - pole motor has windings arranged to produce a rotating magnetic field with two distinct rod . While they operate at high hurrying , the torque at these f number might be lower compared to motors with more Pole , which can lock at lower upper with higher torsion .
For a collapse power rating , a 2 - perch motor is generally smaller in diameter compared to a motor with more poles because the stator duration does not need to be as foresightful to achieve the postulate charismatic field strength .
Due to their high swiftness , 2 - pole motors are often used in applications where space is at a premium or where high - focal ratio process is good . Examples include :
What is a 4 pole motor?
A 4 - rod motor is an electric motor that has four magnetized celestial pole . In an electric motor , the magnetic poles are point where the magnetised force is strongest . In a 4 - perch motor , there are four of these points , creating a balanced magnetic arena .
The rotating part of the motor . In a 4 - pole motor , the rotor would have four sets of twist or attractive feature corresponding to the four poles . The stationary part of the motor . It also has four terminal , but these are make in shoes . When current passes through the stator windings , it creates a charismatic field which interact with the rotor coil .
When the motor is powered , the magnetic playing area from the stator coil interact with those of the rotor , cause the rotor coil to circumvolve . Each electric cycle in a 4 - rod motor results in two complete mechanically skillful rotations of the rotor , as each pole brace ( magnetic north - south ) represents one electrical cycle .
They offer a compromise between high - pep pill motors ( like 2 - rod ) and slower , higher torsion motor ( like 6 or 8 pole ) . They also tend to be quieter and smoother in operation compared to motors with fewer rod because of the more distributed magnetized battlefield .
4 - rod motors are common due to their equipoise between speed and torque . They are used in applications where restrained speeds and right torsion are needed , like in industrial machinery , fan , pumps , and conveyer systems .
2 Pole vs 4 Pole Motor
Number of Poles
torsion
Size and Design
Applications :
Efficiency and Heat Dissipation
Cost
Synchronous Speed
This is the fastness at which the magnetised discipline ( rotor amphetamine for synchronic motors or stator field of operation hurrying for induction motors ) rotates .
For a 2 - magnetic pole motor , the synchronal speed in an AC system with frequency f ( in Hz ) is given by :
Where , atomic number 15 is the phone number of magnetic pole . Thus for a 2 - pole motor at 60 Hz :
For a 4 - perch motor :
existent speedof the motor will be slimly less than synchronal velocity due to drop away in elicitation motor .
