Rotor Of An Induction Motor

Title:

JS Low Voltage Squirrel Cage Three Phase Motor

Brief Introduction

Rotor type JS motor is a wire-wound squirrel cage three phase motor. The rotor of an induction motor is connected to an external varistor through a slip ring and a brush, which can improve the start-up performance or speed regulation by adjusting the resistance.Compared with the cage rotor, its structure is more complex but its control flexibility is higher. This series of motors meets industrial-grade protection standards.

Main Technical Parameters

Why choose Simo Brand JS series of Motor?

JS AC motor, usually used to drive low-load mechanical equipment, such as fans, pumps, compressors, etc.The motor can adjust the speed by adjusting the voltage and frequency to adapt to different working loads.The power range of JS series motors is usually between 0.37KW and 315KW.

When the three-phase stator windings of the motor (each with a difference of 120 degrees electrical angle) are connected to the three-phase symmetrical alternating current, a rotating magnetic field will be generated. The rotating magnetic field cuts the rotor winding, thereby generating an induced current in the rotor winding (the rotor winding is a closed path), and the current-carrying rotor conductor will generate electromagnetic force under the action of the stator rotating magnetic field, thereby forming an electromagnetic torque on the motor shaft, driving the motor to rotate, and the direction of rotation of the motor is the same as the direction of the rotating magnetic field.

The speed of the rotor of an induction motor is lower than that of the rotating magnetic field. The rotor winding induces electromotive force and current due to the relative movement with the magnetic field, and interacts with the magnetic field to produce electromagnetic torque to achieve energy conversion. Compared with single-phase asynchronous motors, three-phase asynchronous motors have good operating performance and can save various materials.

According to the different rotor structures, rotor of an induction motor can be divided into two types: cage type and winding type.The asynchronous motor with cage rotor has a simple structure, reliable operation, light weight and cheap price, and has been widely used. Its main disadvantage is the difficulty of speed regulation.The rotor of an induction motor, like the stator, is also provided with a three-phase winding and is connected to an external varistor through a slip ring and a brush.Adjusting the resistance of the varistor can improve the starting performance of the motor and adjust the speed of the motor.

Production Details

Frame

• Box structure frame, easy for maintaining and installation

• Flexible for special installation dimensions

• Customizable outlook and dimensions

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Stator

• 99.9% pure copper winding for stator to ensure the output power and efficiency

• Excellent insulation system with 5 more processing flows

• All the windings are fitted in by handwork to ensure all slots are full and avoid any possible winding flaw.

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Rotor

• Aluminum casting rotor with high quality silicon steel rotor core to assure induction efficiency

• Copper bar rotor is available for YKS motor

• Well and precisely machined shafts with good capacity of strength and toughness

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Testing

• All motors must pass the piece testing before painting and packaging

• Type tests will be regularly performed for each series, more often for new developed series and variants.

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Package and delivery

• All motors will be packaged well before delivery

• Plastic cover inside, vacuum tin foil outer and then solid wood box

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Applications

Simo JR motor can be used and perform well where heavy starting load is needed, speed adjusting when operating, insufficient power distribution capacity or the squirrel-cage rotor motor cannot be started smoothly. It can drive different machinery such as blowers, compressors, pumps, crushers, ball mills and other equipment in coalmines, machinery industry, power plants and various types of industrial and mining enterprises.  More application details, click here.

Cement

Power station

Mining

Water conservation

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