China Standard Big and Medium Size High Voltage Induction Asynchronous AC Electric Motor vacuum pump design

Product Description

YRKK series IC616 IP54/IP55 Medium/ High Voltage Wound rotor Slip Ring AC Motor


YR series IC01 IP23 Three Phase Slip Ring Asynchronous Induction AC Motor

YKK series IC611 TEAAC Medium/ high voltage Three Phase Squirrel cage Asynchronous AC Motor

YKS series IC81W TEWAC medium/ high voltage Three Phase Squirrel cage Induction AC Motor


1. General introduction
Y Y2 YJS YKK YKS series 380 V ~ 11 Kv squirrel-cage 3 phase asynchronous induction motor, is building on the advanced technology in the nation.
The motors has a lot of advantages such as height efficiency, enerty-saving, low noise and vibration ,light weight and reilable performance. THey are easy for installation andmaintenance. The motor has high insulation class and moistureproof capacity.
The motor is used to drive various mechanical equipments such as blowers, pumps, crushers, storkremoing machines and other  equipments. It can serve as the prime movers in coalmines, mechanical industries, powerplants and various industrial enterprises.

2. Brief Construction
The motor adopts compacted box structure, welding-jointed steel plate forits frame, light weight, rigid in construction, there is closed air to air coolers on the stator frame convenient for installation and maintenance.
Stator winding adopts F class insulation and its end adopts firm binding. The whole stator adopts solvent-free varnish Vacuum pressure impregnation(VPI) to ensure the stator has excellent electric property and humidity resistance.
Rotor is made of cast aluminium or copper bar. Aluminium rotor is made of pure aluminium, copper barwedging copper rotor enhances the entorety of rotor.
The motor adopts rolling bering or sliding bering, according to the output power and rotary speed. Bearing protection grade normally is IP44. If the motor’s protect grade increases, so does the berings’. Rolling bearing adopts iubricating gresse and its grease charger and discharger can be charged or discharged without stopping the motor.
The junction box is of IP54 protection grade and it is usually mounted on the motor’s right side(viewed from shaft extension end.) It is also can be mounted on the left side and its outlets have 4 optional orientations(up, down, left or right.) Separated grounding unit is available in main junction box, too.

3. Working conditions and performance
a) THe rated power supply is 6KV/50HZ, 10KV/50HZ.
b) The insulation class is F, the protection degreeis IP44 or IP54.
c) Height above sea level does not exceeding 1000 meters.
d) Height environmental temperature-15ºC.silding bering>5ºC.
e) The ambient air relative humidity does not exceed 95% and the mean monthly minimum temperature of current month does not exceed 25ºC
f) The deviation between power voltage and rated voltage is less than5%.
g) Rated frequency:50Hz+1%.
h) Duty type:continuous duty type S1.
i) Cooling method is IC611.

Order requirement:
Please indicate the motor type, rated output, rated voltage, rated frequency, synchronous speed, Explosion proof Mark, mounting type, protection grade, cooling method, rotation direction(view from the shaft extension side), using environment (indoor /outside).

Comparison of different series Big Size Three Phase MV HV HT Medium/ High Voltage Induction AC motors

No. Squirrel-cage motor Y JS YKK YKS Y2 YJS
Slip ring motor YR JR JR2 YRKK YRKS YR2 YR3
1 Structure Box-type construction, made up of steel plates welded with each other Compact struction
2 Cooling method IC01 or (IC11, IC21, IC31) IC611 or IC616 IC81W IC411
3 Natural ventilation, with top mounted protection cover With top mounted air-air cooler With top mounted air-water cooler  
4 Protection type IP23 IP44, IP54, IP55 IP44, IP54, IP55 IP54, IP55
5 Insulation F
6 Mounting arrangement IMB3, IMV1, IMB35
7 Voltage available 380~690 V, 2400 V 4160 V, 3 kv, 3.3 kv;  6 kv, 6.3 Kv 6.6 kv;      10 kv, 11 kv
8 Frequency available 50 Hz , 60 Hz


Application: Industrial
Operating Speed: Constant Speed
Number of Stator: Three-Phase
Species: Y, Yjs, Ykk, Yks, Yr, Yrkk, Yrks
Casing Protection: IP23 IP44 IP54 IP55
Number of Poles: 2,4,6,8,10,12


induction motor

What maintenance practices are essential for prolonging the lifespan of an induction motor?

Maintaining induction motors is crucial for ensuring their longevity and optimal performance. Here are some essential maintenance practices that can help prolong the lifespan of an induction motor:

  • Regular Inspections:
    • Perform routine visual inspections of the motor to check for any signs of wear, damage, or loose connections.
    • Inspect the motor’s ventilation system, cooling fans, and air filters to ensure proper airflow for cooling.
    • Look for any abnormal vibrations, unusual noises, or overheating during operation.
  • Cleaning and Lubrication:
    • Keep the motor clean by removing dust, dirt, and debris that may accumulate on the motor’s surfaces and cooling fins.
    • Regularly lubricate the motor’s bearings as per the manufacturer’s recommendations to reduce friction and wear.
    • Ensure that the lubrication used is compatible with the motor’s bearing type and operating conditions.
  • Monitoring and Testing:
    • Monitor the motor’s operating parameters such as voltage, current, power factor, and temperature using appropriate instrumentation.
    • Conduct periodic electrical tests, such as insulation resistance tests and winding resistance measurements, to detect any insulation deterioration or anomalies in the motor’s electrical circuit.
    • Perform vibration analysis and motor signature analysis to identify potential mechanical issues or faults in the motor’s components.
  • Belt and Coupling Maintenance:
    • If the motor is coupled to driven equipment using belts or couplings, regularly inspect and adjust the tension of the belts or couplings to ensure proper power transmission.
    • Replace worn-out or damaged belts and couplings promptly to prevent excessive vibrations or misalignments that can affect the motor’s performance.
  • Protection and Enclosure:
    • Ensure that the motor is adequately protected from environmental factors such as dust, moisture, and corrosive substances.
    • Verify that the motor’s enclosure or housing is intact and provides sufficient protection against ingress of foreign materials.
    • Consider installing additional protective measures, such as motor covers or guards, if the motor operates in harsh or hazardous environments.
  • Corrective Maintenance:
    • Promptly address any identified issues or abnormalities in the motor’s performance through corrective maintenance.
    • Repair or replace faulty components, such as bearings, windings, or capacitors, using genuine replacement parts recommended by the motor manufacturer.
    • Engage qualified technicians or electricians for complex repairs or rewinding tasks to ensure proper handling of the motor.
  • Documentation and Record-Keeping:
    • Maintain comprehensive records of the motor’s maintenance activities, including inspection reports, test results, repairs, and replacements.
    • Track the motor’s history and performance trends to identify any recurring issues or patterns that may require special attention.
    • Use the documentation and records as a reference for future maintenance and as a resource for troubleshooting or warranty claims.

Adhering to these maintenance practices can significantly extend the lifespan of an induction motor and ensure its reliable operation over time. Regular inspections, cleaning, monitoring, and timely corrective actions are key to preventing major failures and optimizing the motor’s performance.

induction motor

How do induction motors impact the overall productivity of manufacturing processes?

Induction motors have a significant impact on the overall productivity of manufacturing processes. Their reliable performance, efficiency, and versatility contribute to increased productivity and operational efficiency. Here’s a detailed explanation of how induction motors impact manufacturing processes:

Power and Energy Efficiency:

Induction motors are known for their high power density and energy efficiency. They convert electrical energy into mechanical energy with minimal losses, making them cost-effective and environmentally friendly. The efficient operation of induction motors reduces energy consumption and lowers utility costs, directly contributing to improved productivity by reducing operational expenses.

Reliability and Durability:

Induction motors are robust and reliable machines that can withstand demanding industrial environments. Their simple design, absence of brushes and commutators, and use of rugged components make them highly durable and resistant to wear and tear. The reliability of induction motors translates into reduced downtime, fewer maintenance requirements, and uninterrupted production, all of which contribute to increased productivity.

Wide Range of Applications:

Induction motors find applications across various manufacturing processes and industries. They are versatile and can be used in a wide range of machinery and equipment, such as pumps, fans, compressors, conveyors, mixers, and more. The availability of induction motors for different power ratings and speeds allows manufacturers to select motors that precisely match their process requirements, resulting in optimized performance and productivity.

Control and Automation:

Induction motors can be integrated with advanced control systems and automation technologies, enhancing their functionality and control capabilities. By using Variable Frequency Drives (VFDs) and Programmable Logic Controllers (PLCs), manufacturers can precisely control motor speed, torque, and performance. This level of control enables fine-tuning of manufacturing processes, improved process control, and optimized energy consumption, leading to increased productivity.

Start-up and Ramp-up Capability:

Induction motors offer excellent start-up and ramp-up capability, allowing manufacturing processes to achieve the desired operating conditions quickly. The high starting torque of induction motors enables efficient motor start-up, reducing the time required for equipment warm-up and reaching the desired production levels faster. This capability contributes to overall productivity by minimizing production delays and maximizing output.

Scalability and Flexibility:

Induction motors provide scalability and flexibility to manufacturing processes. They can be easily adapted to meet changing production requirements, allowing for increased or decreased motor power, speed, or control parameters. This flexibility enables manufacturers to optimize their processes, adjust to market demands, and efficiently utilize their equipment, resulting in improved productivity and responsiveness.

Overall Equipment Effectiveness (OEE):

Induction motors play a crucial role in improving Overall Equipment Effectiveness (OEE) in manufacturing processes. OEE is a measure of how effectively equipment is utilized to produce quality products at the desired rate. By delivering reliable performance, energy efficiency, and control capabilities, induction motors contribute to increased equipment availability, reduced downtime, and enhanced production quality, all of which positively impact OEE and overall productivity.

In conclusion, induction motors significantly impact the overall productivity of manufacturing processes. Their power and energy efficiency, reliability, versatility, control and automation capabilities, start-up and ramp-up capability, scalability and flexibility, and contribution to Overall Equipment Effectiveness (OEE) make them essential components in modern manufacturing, enabling efficient and productive operations.

induction motor

Can you explain the basic principles of induction motor operation?

An induction motor operates based on the fundamental principles of electromagnetism and electromagnetic induction. Here’s a detailed explanation of the basic principles of induction motor operation:

  • Electromagnetic Induction:
    • Electromagnetic induction is the phenomenon where a changing magnetic field induces an electromotive force (EMF) or voltage in a conductor.
    • In an induction motor, the stator windings are connected to an AC power supply, which produces a rotating magnetic field.
    • This rotating magnetic field induces voltage in the rotor conductors through electromagnetic induction.
  • Rotating Magnetic Field:
    • The stator windings of an induction motor are arranged in such a way that they create a rotating magnetic field when energized by the AC power supply.
    • The number of poles in the motor determines the speed of the rotating magnetic field. The synchronous speed of the magnetic field is given by the formula: synchronous speed = (120 x frequency) / number of poles.
    • For example, a 4-pole motor operating with a 60 Hz power supply will have a synchronous speed of 1,800 revolutions per minute (RPM).
    • The rotating magnetic field generated by the stator induces a voltage in the rotor conductors, which in turn creates its own magnetic field.
  • Slip and Rotor Movement:
    • When the rotor conductors are exposed to the rotating magnetic field, an induced voltage and current are generated in the rotor.
    • The interaction between the rotor’s magnetic field and the stator’s rotating magnetic field creates a torque, which causes the rotor to start rotating.
    • However, the rotor does not rotate at the synchronous speed of the magnetic field. The actual rotor speed is slightly lower, resulting in a slip.
    • The slip is necessary for the motor to develop torque. It allows the rotor to create its own magnetic field that interacts with the rotating magnetic field of the stator, generating the required torque to perform work.
  • Induced Rotor Current:
    • The rotor current is induced by the voltage difference between the rotor conductors and the rotating magnetic field of the stator.
    • For squirrel cage induction motors, the rotor consists of short-circuited conductive bars or loops. The induced current flows through these conductors, generating a magnetic field that opposes the stator’s magnetic field.
    • The interaction between the rotor’s magnetic field and the stator’s magnetic field produces torque, allowing the motor to overcome inertia and start rotating.
  • Motor Speed and Torque:
    • The speed of an induction motor is determined by the slip between the rotor speed and the synchronous speed of the rotating magnetic field.
    • A small slip allows the motor to develop torque and operate efficiently. As the load on the motor increases, the slip also increases to maintain the torque required to drive the load.
    • The torque produced by the motor is proportional to the square of the induced rotor current and is also influenced by the strength of the rotating magnetic field.

In summary, the basic principles of induction motor operation involve the generation of a rotating magnetic field by the stator windings, which induces voltage and current in the rotor conductors through electromagnetic induction. The interaction between the rotor’s magnetic field and the rotating magnetic field of the stator produces torque, allowing the motor to rotate and perform mechanical work. The slip between the rotor speed and the synchronous speed ensures the motor can develop the necessary torque for various loads.

China Standard Big and Medium Size High Voltage Induction Asynchronous AC Electric Motor   vacuum pump design		China Standard Big and Medium Size High Voltage Induction Asynchronous AC Electric Motor   vacuum pump design
editor by CX 2023-11-18