Shenzhen Go-Gold Motor Co., Ltd.
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Product Description
KG-18075M22 Commercial Kitchen Equipment AC220V/50Hz 4P NoLoad Power 2500±10% Three Phase
Outer dimesion
Induction Motors and Transformers
Both induction motor and transformer works onthe principle of induced voltage
- Transformer: voltage applied to the primary windingsproduce an induced voltage in the secondary windings- Induction motor: voltage applied to the stator windingsproduce an induced voltage in the rotor windings- The difference is that, in the case of the inductionmotor, the secondary windings can move- Due to the rotation of the rotor, the induced voltage init does not have the same frequency of the statorvoltage.
Induction Motors - Classification
Based on type of ac supply,Three Phase Induction Motors
-Self starting
-Extensively used in industries and hence known as 'work horse' ofmodern industry
Single Phase Induction Motors
- not self starting
-applications restricted to small power ratings
Three Phase Induction Motors
Advantages
-Simple design
-Rugged construction
-Reliable operation
-Low cost
-Minimum maintenance
-High efficiency and good pf at full load
Construction
-Consists of Stator and Rotor.
-Rotor is separated from stator by a small airgap (0.4 mm to 4mm
-Depending on rotor construction, induction motors are classified as
1. Squirrel Cage lnduction Motor (SCIM)
2. Slip Ring Induction Motor (SRIM)
Construction - Stator
Main Parts
-Frame
-Stator Core
-3 distributed winding
Construction - Stator
Frame
Cylindrical in shape and made of cast ironProvides support and act as protective cover.Provided with fins to increase heat dissipation.
Stator Core
Cylindrical in shape and made of silicon steel laminationsProvides space for accommodating 3 balanced winding
Stator Winding
Made of copper wire.
The 3 coils from 3 windings are distributed over slotsBoth λ/△ connections are possible
Construction - Squirrel Cage Rotor
Main Parts
-Shaft
-Rotor Core
-Rotor Bars
Construction - Squirrel Cage Rotor
Rotor Core
-laminated cylindrical core
-have slots on its outer periphery
Rotor Core
-A thick copper or aluminum bar is placed in each slot
-All these bars are joined together at both ends by metal rings called endrings.
-Rotor circuit is permanently closed circuit.Rotor bars and end rings together resembles the cage of squirrel andhence the name