An induction motor is an electrical device that converts electrical energy into mechanical energy. It is most widely used for industrial applications due to its self-starting attribute. Slip ring induction motor is one of the types of 3-phase induction motor and is a wound rotor motor type. Because of various advantages like low initial current, high starting torque, and improved power factor, it is used in applications that require high torque, cranes, and elevators.
YR series (IP44) slip ring induction motor is a general-purpose wound rotor three-phase asynchronous motor. It is the latest design and updated product. Its installation size and power level are in line with the International Electrotechnical Commission (IEC) rotating motor standard, installation size and power level. The correspondence between the two is consistent with the West German DIN42679 standard.
YR (IP44) slip ring induction motor can provide large starting torque at a small starting current and can adjust speed within a certain range
YR (IP44) winding slip ring motor has a protective degree of IP44, which has good protection performance and can be used in dusty environments and in general places without flammable, explosive or corrosive gases. In environments with relatively humid and slightly corrosive gases, it is also better than a protective structure.
YR slip ring induction motor has the advantages of high efficiency, strong overload capability, large starting torque, reliable structure and beautiful appearance. In particular, the basic structural components such as the base are common to the Y (IP44) basic series of motors, and the parameters of the stator and rotor are relatively uniform, which brings convenience to the user. Anyone who has selected the JR series motor can use the YR series (IP44) motor instead.
YR series (IP44) slip ring induction motor is a general-purpose wound rotor three-phase asynchronous motor. Its power level and installation dimensions are in accordance with IEC standards. The protection grade of YR winding slip ring motor is IP44, which further improves the protection level. Make it more suitable for the use of mechanical equipment in special working conditions. It is widely used in the following situations:
(1) requires a larger starting torque than a squirrel-cage rotor motor;
(2) The capacity of the feeder line is insufficient to start the squirrel-cage rotor motor;
(3) A small range of speed regulation is required;
(4) Synchronized transmission of the "electric shaft". Such as compressors, sugar mills, textile machines, winches, wire drawing machines, conveyors and other machinery.
YR series (IP44) slip ring induction motor has the advantages of high efficiency, energy saving, low noise, low vibration, safe and reliable operation, convenient installation and maintenance. It can be used for various motors used in general purposes, such as ball mills, fans, compressors, water pumps, crushers, cutting machines, transportation machinery and other original motors. In addition, it can also be used to drive large torque inertia fans, coal mills, rolling mills, winches, electric shovel and other machinery, especially for mechanical equipment under special working conditions with high requirements on motor protection.
Frame number range: 280-315
Power range: 55-220KW
Number of poles: 4/6/8/10/12
Rated frequency: 50Hz/60Hz
Protection level: IP44 (slip ring protection class IP23)
Cooling method: IC411
Working system: S1
Insulation class: Class F
Wiring method: stator △ connection method, rotor is Y connection method
Installation method: B3 (horizontal installation)
Ambient temperature: ≥ -15 ℃ and ≤ 40 ℃
Feature of Induction motors
YR slip ring induction motor has the advantages of high efficiency, strong overload capability, large starting torque, reliable structure and beautiful appearance. The enclosure protection grade is IP44, which has good protection performance, can be used in dusty environment, and is not flammable. General place for explosive or corrosive gases. In environments with relatively humid and slightly corrosive gases, it is also better than a protective structure.
The difference between these two motors is discussed below.
|Slip Ring Motor||Squirrel Cage Motor|
|It has a rotor of wound type||Its rotor is of squirrel cage type|
|Rotor has cylindrical core has parallel slots, in which each slot has a bar||Slots are not parallel to each other|
|Construction is complicated because of slip rings and brushes||Construction is simple|
|External resistance circuit is connected with a motor||No external resistance circuit as bars of the rotor is completely slotted|
|Starting torque is high||Torque is low|
|Efficiency is low||Efficiency is high|
The advantages are
High and excellent starting torque to support high inertia loads.
It has a low starting current due to external resistance
Can take full load current that is 6 to 7 times higher
The disadvantages are
Includes higher maintenance costs due to brushes and slip rings compared to squirrel cage motor
High copper loss
Low efficiency and low power factor
Expensive than 3 phase squirrel cage induction motor
Slip is defined as the difference between the flux speed and the rotor speed. For an induction motor to produce torque, at least some difference should be there between stator field speed and rotor speed. This difference is called ‘slip’. The Slip Ring” is an electromechanical device that aids in transmitting power and electrical signals from a stationary to a rotating component.
Slip rings are also known as rotary electrical interfaces, electric rotary joints, swivels, or collector rings. Sometimes, based on the application, the slip ring requires higher bandwidth to transmit data. Slip rings improve the efficiency and performance of a motor by improving system operation and eliminating wires that are dangling from motor joints.
There are many types of motor products manufactured and sold by our company. The main products are high- and low-voltage three-phase asynchronous motors. The motor structure types include squirrel-cage type and winding type. Among them, high-voltage synchronous motors mainly support air compressors and mine ball mill equipment. use. We adhere to the service tenet of "focus on products, service with heart" and provide high-quality motor products to customers. Click here to view more induction motors.
1. The outer packaging of the products are all standard export-oriented wooden plywood packaging.
2, the product packaging is protected by moisture, water plastic soft packaging
3. For products with special transportation requirements (such as temperature, fragile, variability, and easy to get wet), the packaging protection measures will be strengthened, and the target mark will be printed on the package.
4. There are obvious signs and symbols on the packing box that must be paid attention to during transportation and storage (such as position, moisture, rain, shockproof, lifting position, etc.).
The motor products manufactured by our company have obtained the ISO9001 quality management management system certification, passed the CCC/COC, China energy-saving product certification, and passed the certification certificates of CE/UL/IRIS/CAS and other European and American countries. The company strictly improves the quality and efficient motor products and services for users in strict accordance with the requirements of relevant product standards.
Shijiazhuang ZCL Electric Motor Technology Co., Ltd. is a company mainly engaged in the manufacture, research and development and sales of motor products. The company has many types of motor products, including IEC standard motors. It is a professional IEC motor manufacturer. Related motor products have passed the product certification in China, the United States, Canada, Europe, the Middle East and other regions, and the products are exported to all over the world. Companies adhere to the "focus on products, service" business philosophy, is committed to improving the quality of safe motor products and services for customers around the world.
1). What is slip in an electric motor?
Slip is defined as the difference between synchronous speed and operating speed, at the same frequency.
2). Where are squirrel cage induction motors used?
They are used in centrifugal pumps, large blowers, and fans, to run conveyor belts, etc.
3). What is a slip ring induction motor?
A motor with a wound-type rotor is known as a slip ring induction motor. Also, rotor windings are connected through slip rings to external resistance.
4). Name one disadvantage of slip ring induction motor and squirrel cage induction motor
The disadvantages are high copper losses and the low torque
5). What is the use of external resistance in slip ring induction motors?
The external resistance acts as a variable rheostat during the motor kick-off and tweaks automatically to high resistance to get required starting current.
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