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Three phase induction motor

Three phase induction motor

three phase induction motor, single phase induction motor, 3 phase squirrel cage induction motor, types of three phase induction motor, three phase asynchronous motor

1. Motor Definition

Three phase induction motor is a device that converts electrical energy of alternating current into mechanical energy. An Three phase induction motor consists mainly of an electromagnet winding or distributed stator winding used to generate a magnetic field and a rotating armature or rotor. The electric motor is made by means of the rotation of an energized coil under force in a magnetic field.

2. Classification Products

According to statistics, three phase induction motors can be classified in the following two ways:

Y2 motor is a fully enclosed, self-fan-cooled, cage-type three-phase asynchronous motor, which replaces the y-series (IP44) motor and reaches the international advanced level in the 1990s.

Chinese name Y2 motor rated voltage 380V rated frequency 50Hz, 4 protection grade IP5

Y2 series (h63-h355, 0.18-315kw) motors are fully enclosed, self-fan-cooled cage three-phase asynchronous motors, which are the replacement products of Y series (IP44) motors, reaching the international advanced level in the 1990s.

Three phase induction motor

Y2 series three phase induction motors are of Y series motor with high efficiency, large starting torque, improves the degree of protection (IP54), improve the insulation class, class F insulation, according to the assessment of class B, ([1] 315 l2-2, 4355 full specifications with F examination) reduces the noise (with load noise assessment), motor appearance is novel and attractive, structure more reasonable.Its power grade and installation size are the same as those of Y series motors, which are in full compliance with IEC standards.

Y2 series three phase induction motors are general purpose motors, suitable for driving all kinds of mechanical equipment without special requirements.

The cooling mode of Y2 series three phase induction motors is IC0141, Y connection below 3kW, delta connection above 4kW, the ambient temperature does not exceed 40℃.The lowest temperature is -15℃, the altitude is less than 1000m, and the working mode is continuous (S1).

 Three phase induction motor

  1. Function

According to its function, Three phase induction motor is usually divided into ac generator, Three phase induction motor and synchronous camera. Due to the reversibility of the working state of the motor, the same motor can be used as both generator and motor.

It is not exact to divide motor into generator and motor, but some motors are mainly used for generator operation, and some motors are mainly used for motor operation

Three phase induction motor

Y series (IP44) three-phase asynchronous motor (H80 ~ 355 with high center height) is a fully enclosed self-fan-cooled squirrel cage three-phase asynchronous electric motor, which is a basic series of unified national design.

Y series motor is efficient, energy saving, high starting moment, low noise, low vibration, safe and reliable operation.The power rating and mounting dimensions are in full compliance with IEC standards and DIN42673.This series of motors adopts B grade insulation, shell protection grade is IP44, cooling mode is IC0141.

Three phase induction motor

Y series three-phase asynchronous motors are general purpose motors.Suitable for dust flying, water and soil splashing places and no special performance requirements of various mechanical equipment.Such as metal cutting machine tools, blower, water pump and so on.Because the motor has a better starting performance, it is also suitable for some machinery with higher requirements on starting torque, such as compressor.The y-series motors have a voltage of 380 volts and a rated frequency of 50 Hertz.This series of motors can be derived according to the requirements of users, such as voltage can be made into rated voltage of 500 volts and rated frequency of 60 Hertz motor, in addition, can be made into moisture-proof, mildew proof, hot and humid zone type or outdoor type motor and different noise levels of motor and other special requirements.

Three phase induction motor

Y-l series (h132-315 center high, low noise) L low instrument acoustic motor is our factory applied CAD technology, using the latest electromagnetic theory developed.The motor has the same shape and mounting size as the Y series and conforms to IEC standards and DIN42673.On the premise of other performance meeting the national standard, the load noise, temperature rise, foot strength and other aspects have been obviously improved.

Y2 series (h63-355mm, 0.18-315kw) motors are fully enclosed, self-fan-cooled squirrel-cage three-phase asynchronous motors.It is a new basic series of replacement Y series designed jointly by the whole country. The products have reached the international advanced level in the 1990s.

Three phase induction motor

Y2 series three-phase asynchronous motors are general purpose motors, suitable for all kinds of mechanical equipment without special requirements.The rated voltage of Y2 series three phase induction motors is 380V and the rated frequency is 50Hz.3kW and below for Y connection, 4kW above for delta connection.Y2 series three phase induction motors generally have only one shaft extension, if the user needs double shaft extension and the junction box is located at the top of the frame, the motors can be supplied according to special orders, and the motors can also be designed to provide special voltage, frequency, TH damp-heat type and other special USES according to the user's needs.

Three phase induction motor

Y series and Y2 series have the same installation size. If the selected frame size is the same, their external dimensions are exactly the same. They are produced according to international standards.

The difference between the two

Three phase induction motor

In terms of technology, Y2 series three phase induction motors, in addition to the advantages of Y series motors, improve the protection level (IP54), improve the insulation level (F) and grade B assessment, reduce noise, and use load noise assessment, the motor structure is more reasonable, the appearance is novel and beautiful.Motor cooling mode is IC411.Installation dimensions and power rating in full compliance with IEC standards and DIN42673 (same as Y series);In terms of price, Y series is relatively cheap, and the purchase of Y series is more than Y2 series, and Y2 series housing is more expensive than Y series, and now many manufacturers of Y series motor are using Y2 series of technical data, so the performance difference between the two is not very big.

 

The main structure

 Three phase induction motor

The frame and end cover of three-phase asynchronous motor are made of cast iron.Enclosure protection class is IP44, can prevent Ф 1 mm solid into the motor internal and prevent water splashing cause harmful effects to the motor.

Three phase induction motor

Motor adopts fan self-cooling structure, fan and shaft adopt key fit, reliable operation.The air cover is made of perforated steel plate after stretching, with smooth air path, beautiful appearance and good rigidity.

Three phase induction motor

The junction box of the motor has a good sealing performance, and the box has a large cavity for easy wiring.The outlet is provided with a locking device, and the outlet can be arbitrary from four directions parallel or perpendicular to the axis of the motor.As seen from the shaft extension end, the outlet box is on the right side of the frame.According to the user's needs, the outlet box can also be on the left side of the frame.

The rotor of the motor is cast aluminum squirrel cage rotor.The aluminum rotor is fixed on the shaft by hot sleeve or cold pressing process.The insulation grade of H80 ~ 315 motors with high center height is B, and Y355 series is F.

Conditions of use

Ambient temperature: varies with seasons, but not more than 40℃

Altitude: no more than 1000 m

Frequency: 50 hz

Voltage: 380 volts

Connection method: 3000 w and below is Y and 4000 w and above is inverted

Working mode: continuous (S1)

Power range: 2 poles ---0.75 ~ 90kw 4 poles ---0.55 ~ 90kw 6 poles ---0.75 ~ 55kw 8 poles ---2.2 ~ 45kw

Three phase induction motor

  1. Category

three phase induction motors are divided into two categories: synchronous motor and asynchronous motor. Synchronous motor rotor speed ns and rotating magnetic field of the same speed, known as the synchronous speed. There is a strict relationship between ns and the frequency (f) of the ac connected and the logarithm of the magnetic pole (P) of the motor.

3. Working Principle

Induction motor is also called "asynchronousmotor", that is, the rotor is placed in a rotating magnetic field, and a rotating torque can be obtained under the action of the rotating magnetic field, thus the rotor rotates. The outer and inner structure of an induction motor the rotor is a rotatable conductor, usually in the form of a squirrel-cage. The stator is the non-rotating part of the motor whose main task is to generate a rotating magnetic field. Rotating magnetic fields are not done mechanically. Instead, an alternating current is applied to a number of pairs of electromagnets, so that the properties of its magnetic poles are cyclically changed, thus equivalent to a rotating magnetic field. Unlike dc motors, which have brushes or collector rings, single-phase motors and three-phase motors depend on the type of alternating current used. 

Three phase induction motor

Y2 motor is a fully enclosed, self-fan-cooled, cage-type three-phase asynchronous motor, which replaces the y-series (IP44) motor and reaches the international advanced level in the 1990s.

Y2 series (h63-h355, 0.18-315kw) motors are fully enclosed, self-fan-cooled cage three-phase asynchronous motors, which are the replacement products of Y series (IP44) motors, reaching the international advanced level in the 1990s.

Y2 ies three phase induction motors are of Y series motor with high efficiency, large starting torque, improves the degree of protection (IP54), improve the insulation class, class F insulation, according to the assessment of class B, (with the exception of 315 l2-2, 4355 full specifications according to F examination) reduces the noise (with load noise assessment), motor appearance is novel and attractive, structure more reasonable. Its power grade and installation size are the same as those of Y series motors, which are in full compliance with IEC standards.

Three phase induction motor

Y2 series three phase induction motors are general purpose motors, suitable for driving all kinds of mechanical equipment without special requirements.

The cooling mode of Y2 series three phase induction motors is IC0141, Y connection below 3kW, delta connection above 4kW, the ambient temperature does not exceed 40℃. The lowest temperature is -15℃, the altitude is less than 1000m, and the working mode is continuous (S1).

Ordinary low-voltage motor Y2 (frame no. 63-355)

 Main technical parameters
 Rated voltage: 380 v, 660 v, 380/660 v, 660/1140 v
Three phase induction motor

Rated frequency: 50HZ (or 60HZ as needed)

 Insulation grade: F
 Protection grade: IP54 (enclosed)
 Work schedule: S1 continuous work schedule
 Ambient temperature: -15℃ ~ +40℃
 Altitude: no more than 1000 m 
Three phase induction motorThree phase induction motor

Structural features and USES

Y2 series three phase induction motors have the advantages of high efficiency, energy saving, good performance, small vibration, low noise, long life, high reliability, easy maintenance and large starting torque. Installation dimensions and power rating are in full compliance with IEC/DIN standards. Can be used to drive a variety of general machinery, such as agricultural machinery, food machinery, fan, water pump, gear box, reducer, mixer, air compressor, crusher and other mechanical equipment, but also in petroleum, chemical, pharmaceutical, mining and other relatively bad field cooperation prime mover use.

 Y2-400 series low-voltage high-power three-phase asynchronous motor
 The basic parameters
 Power range: 185KW-500KW
 Number of poles: 2-12 poles
 Rated voltage: 380V, 660V, 380-660v, 660/1140v
 Rated frequency: 50HZ 
Three phase induction motor

Protection grade: IP44 or IP55

Cooling method: IC411 

Work schedule: S1 

Scope of application: suitable for driving all kinds of mechanical equipment without special requirements, such as: machine tools, pumps, fans, etc.

Conditions of use

Voltage fluctuation: -5%-+5%

Frequency fluctuation: -2%-+2% 

Ambient temperature: -15℃-+40℃ 

Altitude: no more than 1000 m 

A coupling is used between the motor and the driven machine

4. Motor Application

three phase induction motors have high working efficiency, no smoke, no smell, no pollution, and less noise. Due to its series of advantages, it is widely used in industrial and agricultural production, transportation, national defense, commercial and household appliances, medical electrical equipment and other aspects.

Three phase induction motor

As a Three phase induction motor, its power range from a few watts to tens of thousands of kilowatts, is the national economy industries and People's Daily life in the most widely used motor, for a variety of mechanical equipment and household appliances to provide power. For example, three-phase Asynchronous Motor is adopted by machine tools, small and medium-sized steel rolling equipment, fans, water pumps, light industrial machinery, metallurgy and mining machinery, etc. Electric fan, washing machine, refrigerator, air conditioner and other household appliances are widely used single-phase asynchronous motor. Asynchronous motors can also be used as generators for wind farms and small hydro-power stations.

 5. Common Troubles

Due to friction, vibration, insulation aging and other reasons, it is hard to avoid failure of Three phase induction motor in operation. These faults, if checked, discovered and eliminated in time, can effectively prevent the occurrence of accidents.

 Three phase induction motor

Y2 series three - phase asynchronous motor editing

Y2 series three phase induction motor is a replacement of Y series motor, which is a general purpose fully enclosed self-fan cooled squirrel-cage three-phase asynchronous motor.It is our country 90 time newest product, its whole level already reached foreign similar product 90 time early level.The product is used in various fields of national economy, such as machine tools, water pumps, fans, compressors, also can be used in transportation, mixing, printing, agricultural machinery, food and other occasions without flammable, explosive or corrosive gas.

Y2 series three-phase asynchronous motor DIN42673 quality electric model no. Y2 voltage 380V power rate 3kwt

Three phase induction motor

1 overview

2 definition of model

3 structure introduction

4 basic parameters

5 technical parameters

An overview of the editor

The installation size and power grade of the Y2 series three phase induction motor are in accordance with IEC standards, in accordance with German DIN42673 standards, and the same as the Y series motor, its shell protection grade is IP54, the cooling method is IC41l, and the continuous working system (S1).F level insulation is adopted, and the temperature rise is assessed according to B level (except for 315l2-2 and 4,355 all specifications are assessed according to F level), and the load noise index is required to be assessed.

The rated voltage of Y2 series three phase induction motors is 380V and the rated frequency is 50Hz.Power 3kwt below for Y connection, other power are delta connection method.The elevation of the motor operating place shall not exceed 1000m;Ambient air temperature changes with the season, but not more than 40℃;The lowest ambient air temperature is -15℃;The average maximum relative humidity of the wettest month is 90%.At the same time the monthly average minimum temperature is not higher than 25℃.

Three phase induction motor

Y2 series three phase induction motors have two designs, one is suitable for general mechanical support and outlet needs, has higher efficiency in light load, has a more festive effect in actual operation, and has a high blocking torque, this design is called y2-y series.Center height 63 ~ 355mm, power from 0.12~315kW.The motor conforms to the technical conditions of JB/ t8680.1-1998 Y2 series (1P54) three-phase asynchronous motor (frame size 63 ~ 355).

Model meaning: for example, y2-200l1-2y: "Y2" means the second modification design of the asynchronous motor, "200" means the height of the center, "L" means the length of the frame, "1" means the length of the core, "2" means the number of poles, and "Y" means the first design (can be omitted).

The second design is more efficient when full load, more suitable for long-term operation and high load rate of use occasions, such as supporting water pump, fan, this design is called y2-e series, center height 80 ~ 280mm, power from 0.55 ~ 90kW.The motor conforms to the technical conditions of JB/ t8680.2-1998 Y2 series (1P54) three-phase asynchronous motor (frame size 80 ~ 280).

Model meaning: for example, y2-200l2-6e: "Y2" means the second modification design of asynchronous motor, "200" means the height of the center, "L" means the length of the frame, "2" means the length of the core, "6" means the number of poles, and "E" means the second design.

Three phase induction motor

1. The frame outline of Y2 series three phase induction motors is square and round. The heat sink is vertical and horizontally parallel.In addition, H63 ~ 112 also has aluminum alloy die-casting structure.

2. This series of motors adopts shallow end cover structure, which increases the number and size of internal reinforcement, all of them adopt cast iron structure, in addition, H63 ~ 112 also has aluminum alloy die-casting structure.In order to facilitate the user to use and maintenance, the H180 and above are equipped with an additional non-stop oil filling device.

3. The protection grade of the junction box is IP55.To reduce the weight of the motor, the H63 ~ 280 junction boxes are die-cast aluminum alloy (cast iron is also available) and the H315 ~ 355 are cast iron.And the box is equipped with a special grounding device, H160 and above frame considering the installation position of thermal protection device, power supply inlet hole adopts double hole inlet, and there are two kinds of sealing structure: one is the encryption seal, the other is the lock tight seal.The junction box is usually located on the top of the frame and can be used for all directions. In addition, the junction box of the H80 ~ 355 cast iron frame can also be located on the side of the frame.

Three phase induction motor

Common fault check:

Listen to the sound and look for the trouble spots carefully during the operation of the ac asynchronous motor, if a fine "buzz" sound is found, and there is no change in the rise or fall, it is a normal sound.

The smell is used to analyze that the fault motor has no peculiar smell in normal operation. If the smell is abnormal, it is the fault signal, such as burnt smell, which is issued by the barbecue of insulation, and will smoke seriously with the rise of the motor temperature. If the smell of oil coke, most of the bearing oil, in the near dry grinding state of oil and gas evaporation smell.

Three phase induction motor

Use feel, check fault to touch the shell of the TV with the hand, can roughly judge the temperature, if touch the motor shell with the hand will feel very hot, the temperature value is very high, should check the reason, such as: the load is too heavy, the voltage is too high, and then in view of the cause of troubleshooting.

6. Maintaining

  • Check whether the grounding of electric and starting equipment is reliable and complete, and whether the wiring is correct and good.
  • Check whether the voltage and frequency shown on the motor nameplate are consistent with the voltage and frequency of the power supply.
  • The motor should always be kept clean, and no sundries are allowed to enter the motor. Air inlet and outlet must be kept free.
  • Monitor power supply voltage, frequency and load current of motor with instrument. The voltage and frequency of the power supply shall conform to the data on the nameplate of the motor, and the load current of the motor shall not exceed the specified value on the nameplate.
  • Regular maintenance after motor operation, generally divided into minor repair, overhaul two. Minor repair belongs to general overhaul, the motor starting equipment and the whole does not make big disassembly, about once a quarter, overhaul will all drive device and motor parts are removed, and will be removed parts for a comprehensive inspection and cleaning, generally once a year.

 

Date

06 September 2019

Tags

AC Motor

 sogears manufacturing

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