1400rpm 3 Phase Induction Motor AC220V/50Hz Commercial Exhaust Fan Motor

Product Specification

AC Induction Motor KG-18075M22 AC220V/50Hz Used In Commercial Kitchen Equipment

Overview

KG-18075M22 Commercial Kitchen Equipment AC220V/50Hz 4P NoLoad Power 2500±10% Three Phase

Performances specification

Outer dimensions

Induction motor refers to a type of motor that uses electromagnetic induction between the stator and rotor to induce current within the rotor to achieve electromechanical energy conversion.

The stator of an induction motor consists of three parts: the stator core, stator winding, and frame.
The rotor is composed of a rotor core, rotor winding, and shaft. The rotor core is also a part of the main magnetic circuit, usually composed of 0.5mm thick silicon steel sheets stacked together, and the core is fixed on the shaft or rotor bracket. The outer surface of the entire rotor is cylindrical. The rotor winding is divided into two types: cage type and winding type.

Under normal circumstances, the rotor speed of an induction motor is always slightly lower or slightly higher than the speed of the rotating magnetic field (synchronous speed), so an induction motor is also known as an "asynchronous motor".

When the load of an induction motor changes, the speed and slip of the rotor will change accordingly, causing corresponding changes in the electromotive force, current, and electromagnetic torque in the rotor conductor to meet the needs of the load.

According to the sum of the positive and negative slip rates, induction motors have three operating states: electric motor, generator, and electromagnetic braking.

The rotating magnetic field

The basic idea of an electric motor is to generate two magnetic fields: rotor magnetic field and stator magnetic field and make the stator field rotating. The rotor will constantly be turning to align its magnetic field with that of the stator field.

The 3-phase set of currents, each of equal magnitude and with a phase difference of 120o , flow in the stator windings and generate a rotating field will constant magnitude.

The stator of an induction motor consists of three parts: the stator core, stator winding, and frame. The stator core is a part of the main magnetic circuit. In order to reduce the eddy currents and hysteresis losses generated by the excitation current and rotating magnetic field in the iron core, the iron core is stacked with 0.5mm thick silicon steel sheets. For motors with larger capacity, both sides of the silicon steel sheet are coated with insulation paint as interlayer insulation. The small stator core is stacked and compressed into a whole with silicon steel sheets, and then fixed in the frame; Medium and large stator cores are assembled by fan-shaped punching pieces.

There are many slots with the same shape uniformly punched in the inner circle of the stator core to embed the stator winding. Small induction motors typically use a semi closed slot and a single layer (loose down) winding made of high-strength enameled wire, with slot insulation between the coil and the iron core. A semi closed slot can reduce the magnetic resistance of the main magnetic circuit and reduce the excitation current, but embedding wires is less convenient. Medium induction motors typically use half open slots. Large high-voltage induction motors all use open slots for easy wire insertion. In order to achieve good electromagnetic performance, both medium and large induction motors use double-layer short pitch windings.

The rotor is composed of a rotor core, rotor winding, and shaft. The rotor core is also a part of the main magnetic circuit, usually composed of 0.5mm thick silicon steel sheets stacked together, and the core is fixed on the shaft or rotor bracket. The outer surface of the entire rotor is cylindrical. The rotor winding is divided into two types: cage type and winding type Cage rotor.

A cage winding is a self closing winding composed of guide bars inserted into each rotor slot and ring end rings at both ends. If the iron core is removed, the entire winding is shaped like a "circular cage", hence it is called a cage winding. To save copper and improve productivity, small cage motors generally use cast aluminum rotors; For medium and large motors, due to the difficulty in ensuring the quality of cast aluminum, a structure of inserting copper bars into the rotor slot and welding end rings at both ends is adopted. The cage type induction motor has a simple structure and convenient manufacturing, making it an economical and durable motor. So it has a wide range of applications.
Wound rotor.

A three-phase winding composed of insulated wires embedded in the slot of a wound rotor, with the three outgoing terminals of the winding connected.

It is connected to three Slip ring on the rotating shaft, and then led out through the brush. This rotor is characterized by that external resistance can be connected in the rotor winding to improve the starting and speed regulating performance of the motor.
Compared with cage rotor, wound rotor has a slightly complex structure and is slightly more expensive, so it is only used in situations where low starting current, high starting torque, or dispatch is required