Wound Rotor Induction Motor Characteristics

Title:

JS Low Voltage Squirrel Cage Three Phase Motor

Brief Introduction

JS wound rotor induction motor characteristics of JS 146-8: Rated power 400 kW, rated voltage 380V, speed 740RPM, stator current 781 A, efficiency 93.8%, power factor 0.83, starting current/rated current 6.0 A, starting torque/rated torque 1.0 times, maximum torque/rated torque 1.6 times, cooling air volume 0.50 m3/s, rotor flywheel torque 165 kg·m2, the maximum allowable flywheel torque of the driven mechanism and reference motor weight please confirm with manufacturer.

Main Technical Parameters

Why choose Simo Brand JS series of Motor?

JS 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 assembly and wound rotor induction motor characteristics of the motor should be firm and reliable to prevent harmful effects under the vibration of normal operation.For the rotating parts of the motor, it should be able to withstand the overspeed test specified in GB/T5171 without loosening and harmful deformation. If the motor has a junction box for accommodating the power supply wires, the junction box should be solid and durable, and its installation should be firm, and harmful deformation and loosening are not allowed. Whether it meets the requirements shall be determined by inspection and the following tests.

For motors with a base number of H90 or more or a motor diameter greater than 180mm, when the motor is installed in any predetermined position, the junction box should be able to withstand a static load of 110kg on its horizontal plane without being damaged. For motors with base number h90 and below or motors with a diameter of 180mm and below, when the motor is installed in any predetermined position, the static load that the junction box should bear on its horizontal plane is calculated according to the horizontal plane, 1.42kg/cm2, but the maximum does not exceed 110kg.This load can be applied through a metal plane with a diameter of 50mm without being damaged. If the junction box is offset or deformed after the load test is applied, and the electrical clearance and creepage distance between the box body and any terminal still meet the requirements of Chapter 15, the junction box is considered qualified.If the motor is equipped with a ring or similar lifting device for lifting the motor, based on its strength limit, its safety factor is at least 5.

For motors with junction boxes, the junction boxes should be installed in parts that are easy to inspect during the normal use of the motors, and should be installed firmly and not allowed to loose. If the motor has capacitors, switches or similar devices, it should be installed firmly, not allowed to loose, and should be easy to replace,The wound rotor induction motor characteristics should have a certain moisture-proof ability. In the insulation structure of the motor, such as enameled wire, groove insulation, lashing belt (rope), tang wedge, etc., there should be certain moisture-proof measures, and there should be good molding and assembly to ensure that the motor winding has reliable insulation and mechanical properties. For capacitive motors, if the housing of the capacitor is metal, the capacitor should not be connected to the hard-to-reach metal parts. Additional insulation should be applied to separate the capacitor from the easy-to-reach metal parts.The current-carrying parts of the motor should be good conductors of electricity and should have corrosion resistance. The non-metallic functional parts of the motor, such as cooling fans, should have sufficient mechanical strength and thermal aging and deformation resistance.

If the corrosion of steel parts may cause the motor to catch fire, electric shock, or harm the person, these parts should be painted, coated, electroplated, or other measures to ensure sufficient rust resistance. However, for steel and iron parts in the housing, if the oxidation is not significant when exposed to air, parts such as bearings and punches may not be required. Anti-corrosion. For parts with suspected anti-rust ability, the following tests and inspections should also be carried out to determine. Immerse the test part in alcohol, gasoline or similar substances for 10 minutes to remove all grease or impurities, and then immerse the part in a solution of ammonia chloride with a temperature of (20±5)℃ and a concentration of 10% for 10 minutes, without wiping it dry, just shake off the water droplets and put the part in a box with saturated humidity and a temperature of (20±5)℃ for 10 minutes; finally, the part is dried in an oven with a temperature of (100±5)℃ for 10 minutes. After the above tests, there should be no rust marks on the surface of the parts, but the rust marks on the sharp edges and any light yellow film that can be erased are negligible. 

Flexible wires connecting power supplies and connecting components. The flexible wire connecting the power supply and the connecting components must meet the relevant standards of the flexible wire, its rated voltage should not be lower than the maximum operating voltage of the motor, and its rated carrying current should not be lower than the rated current value of the motor.Unless there are measures to eliminate the tension that may be suffered by the flexible wire in the final use equipment of the motor, or the flexible wire used to connect the components will not be exposed to the motor or the final use equipment, there should be an insulating protective layer and a clamping device at the lead-out of the flexible wire to eliminate the possible tension on the flexible wire and transfer it to the internal wiring 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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