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Pole changing motor

Pole changing motor

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The Two speed pole changing motor belongs to the variable-speed speed regulation of the asynchronous motor. It is to change the number of poles of the rotating magnetic field of the stator by changing the connection method of the stator windings, thereby changing the rotational speed of pole changing motor.

 Pole changing motor

Two speed pole changing motor editing

It is an asynchronous motor with variable pole speed regulation, which can change the number of pole pairs of stator rotating magnetic field by changing the connection method of stator windings, so as to change the speed of pole changing motor.

pole changing motor parameters

QAD series variable stage multi-speed three-phase asynchronous motor is the electrical derivative of QA series motor, and it is the replacement product of YD series.This series of motors can be regarded as an ideal power to save energy for the mechanical system because it can change the speed of pole changing motor step by step according to the requirements of the load, so as to achieve a reasonable match of power and simplify the variable speed system.In such as machine tools, mining, metallurgy, textiles, printing and dyeing, chemical industry, agricultural machinery and other industrial and agricultural sectors have been widely used.

Pole changing motor

Rated voltage: 380V

Rated current: 0.8a

Rated speed: 2900/1440/960/750 RPM

Rated torque: 15.4nm

External dimension: 132mm

Protection grade: IP55

Weight: 60 kg

Pole changing motor

Through optimization design and process improvement,QA series motor noise, vibration has been greatly reduced and reached the international advanced level.

1. High performance protection level

The standard design protection grade of pole changing motor is IP55, which can provide higher protection grade according to customers' requirements.

2, suitable for wide voltage use

The design of pole changing motor takes into account the voltage variation in different areas, so that pole changing motor can adapt to multiple areas and ensure the user performance.

3, improve the insulation grade, increase the service life of pole changing motor

The standard motor adopts F grade insulation structure, which improves the service life of pole changing motor and increases the reliability of pole changing motor.

Pole changing motor

4. High efficiency

pole changing motor adopts optimized design, has high efficiency, can produce considerable energy saving effect.

5. Reasonable structural design

Flexible lead line direction, beautiful motor shape, heat dissipation rib design into vertical and horizontal distribution, end cover, junction box, wind cover are all new design, beautiful appearance.

Speed change principle

Pole changing motor

The speed change of pole changing motor adopts changing the connection way of winding, that is to say, changing the number of magnetic poles of the rotating magnetic field of pole changing motor to change its speed.

Double-speed motor (fan), usually the speed is low, sometimes the fan is high-speed, mainly through the following external control circuit switch to change the winding connection mode of motor coil to achieve.

1. There are two common windings with different pole pairs embedded in the stator slot. The change of pole pairs can be realized by changing the connection method of pole changing motor stator windings by switching the external control circuit;

2. The stator slot is embedded with two independent windings with different polar logarithms;

3. There are two independent windings with different polar logarithms embedded in the stator slot, and each winding can have different connections.

Electrical schematic diagram of a Two speed pole changing motor controlled by a contactor

Pole changing motor

Equipment profile editor

Two speed pole changing motor belongs to the induction motor pole change speed regulation, is through changing the stator winding connection method to change the stator rotating magnetic field pole logarithm, so as to change pole changing motor speed.

According to the formula;N =60f/p shows that the synchronous speed of asynchronous motor is inversely proportional to the logarithm of magnetic pole. If the logarithm of magnetic pole increases by one time, the synchronous speed n drops to half of the original speed.This speed regulation method is graded, not smooth speed regulation, and only applicable to the squirrel cage motor.

Pole changing motor

This figure introduces the most common single-winding Two speed pole changing motor, speed ratio is equal to the magnetic pole times inverse ratio, such as 2 /4 pole, 4 /8 pole, from stator winding delta connection to YY connection, magnetic pole logarithm from 2p=2 to 2p=1.

Now, the speed ratio is 1/2

Control circuit 

Pole changing motor

1. Close the air switch QF to introduce three-phase power

Stator wiring diagram

Stator wiring diagram

2. Press the start button SB2, the ac contactor KM1 coil loop is energized and self-locking, the main contact of KM1 is closed, and three-phase power is introduced into pole changing motor, L1 is connected to U1, L2 is connected to V1, L3 is connected to W1;U2, V2 and W2 are suspended.Motor in delta operation, at this time pole changing motor p=2, n1=1500 RPM.

Pole changing motor

3. If you want to switch to high-speed operation, press SB3 button. The normally closed contact of SB3 will disconnect the contactor KM1 coil, and the main contact of KM1 will disconnect U1, V1, W1 from the three-phase power source L1, L2 and L3.The auxiliary normally closed contact is restored to be closed, and the power is prepared for the KM2 coil loop.At the same time, the contactor KM2 coil loop is energized and self-locking, its normally open contact is closed, and the stator windings are connected with U1, V1 and W1 at the three leading ends, and the three-phase power L1, L2 and L3 are introduced into connection with U2, V2 and W2. At this time, pole changing motor runs under YY connection method, and pole changing motor p=1 and n1=3000 RPM.The auxiliary normally open contact of KM2 is disconnected to prevent wrong movement of KM1.

Pole changing motor

4. FR1 and FR2 are overload protection components for motor delta operation and YY operation respectively.

5, the control circuit of SB2 normally open contacts and KM1 coil in series, the normally closed contact with KM2 SB2 coil in series, the same button SB3 the normally closed contact of and KM1 coil series, SB3 normally open on KM2 coil in series, this control is the button of the interlock control, ensure the delta and YY two connection may not appear at the same time, at the same time KM2 auxiliary normally closed contact access KM1 coil circuit, auxiliary normally closed contact KM1 access KM2 coil circuit, also form the interlock control.

Pole changing motor

Industry status 

Two speed pole changing motor is mainly used in coal, oil and gas, petrochemical and chemical industries.In addition, in the textile, metallurgy, urban gas, transportation, grain and oil processing, papermaking, medicine and other sectors are also widely used.Two speed pole changing motor as the main power equipment, usually used to drive pumps, fans, compressors and other driving machinery.

Pole changing motor

With the development of technology and production, there are more and more places with explosive risk.For example, the production of edible oil used to be a traditional squeeze process. After the 1970s, China began to introduce foreign advanced oil extraction process, but this process requires the use of chemical solvents containing ethane, which is flammable and explosive material.Therefore, the oil extraction plant becomes an explosion hazard site, requiring the use of Two speed pole changing motors and other explosion-proof electrical products.For example, in recent years, the rapid development of China's highway, a large number of fuel gas stations appear, also to provide a new market for Two speed pole changing motor.

Pole changing motor
Motor parameters
QAD series variable speed multi-speed three-phase asynchronous motor is an electric derivative of QA series motor, which is a replacement product of YD series. This series of motors is an ideal power for mechanical system energy saving because it has a variable speed that can be changed step by step according to the requirements of load characteristics, thus achieving reasonable matching of power and simplifying the characteristics of the transmission system. It is widely used in industrial and agricultural sectors such as machine tools, mining, metallurgy, textile, printing and dyeing, chemical, agricultural machinery.

Pole changing motor

YD series variable pole multi-speed three-phase asynchronous motor is a new type of variable pole multi-speed three-phase asynchronous motor developed on the basis of Y series.Because this series of motors can change the speed of pole changing motor by changing the pole, so as to achieve a reasonable match of power and make the speed change system simplified, so it is widely used in the textile, printing and dyeing, chemical industry and other industries.

YD series variable multi-speed three-phase asynchronous motors are identical with Y series in terms of protection level, service conditions, structure and installation size.The corresponding relation between the power level and the installation size is similar to that of the same kind of foreign products, so it has good interchangeability with the advanced products at home and abroad, which is convenient for export and use as the standby motor of imported equipment.

Pole changing motor

Rated voltage of YD series variable multi-speed three-phase asynchronous motor is 380V, rated frequency is 50Hz, protection grade is IP44, cold mouth method is IC411, B grade insulation is adopted, the structure and installation type of this series of electric motor, appearance size and ya series motor are the same.

YD series Two speed pole changing motor is single winding, three-speed motor is double winding.It is by changing the connection of stator windings to change the number of poles of pole changing motor so that pole changing motor USES one or two sets of windings to obtain two or more speeds.The series of motor products fully comply with the "YD series (1P44) variable pole multi-speed three-phase asynchronous motor technical conditions", because the series of motor with the requirements of the nature of the load and the classification of the speed change, so as to achieve a reasonable power matching and simplified variable speed system characteristics.It is suitable for all kinds of transmission mechanism that need step by step speed regulation, mainly used in universal, combination, special cutting machine tools, mining metallurgy, textile, printing and dyeing, chemical industry, agricultural machinery and other industries.

Pole changing motor

YD Two speed pole changing motor such as machine tools, mining, metallurgy, textile, printing and dyeing, chemical industry, agricultural machinery and other industrial and agricultural sectors have been widely used.

The structure of YD Two speed pole changing motor is fully enclosed, the protection grade is IP44, and the operation mode is S1.The basic installation forms of YD Two speed pole changing motor include IMB3, IMB5 and IMB35.YD two-speed electric machine installation size and shape size and Y series corresponding frame size the same.

YD Two speed pole changing motor belongs to asynchronous pole variable speed motor, which is to change the pole logarithm of stator rotating magnetic field by changing the connection method of stator windings, so as to change the speed of pole changing motor.

Pole changing motor

Transmission principle:

The speed change of pole changing motor adopts changing the connection way of winding, that is to say, changing the number of magnetic poles of the rotating magnetic field of pole changing motor to change its speed.

(fan), usually the speed is low, sometimes the fan is high-speed, mainly through the following external control circuit switch to change the winding connection mode of motor coil to achieve.

Pole changing motor

1. There are two common windings with different pole pairs embedded in the stator slot. The change of pole pairs can be realized by changing the connection method of pole changing motor stator windings by switching the external control circuit;

2. The stator slot is embedded with two independent windings with different polar logarithms;

3. There are two independent windings with different polar logarithms embedded in the stator slot, and each winding can have different connections.

Pole changing motor

Product performance and features:

This series of motors can meet the needs of general use at home and abroad, the frame range of 80-280, is the national unified design of the series of products.

This series of motors has the advantages of high efficiency, energy saving, good performance, small vibration, low noise, long life, high reliability, easy maintenance, large starting torque and so on.Installation dimensions and power rating are in full compliance with IEC standards.Adopt F/H insulation, enclosure protection grade IP44, cooling mode IC411., rated voltage 380V, rated frequency 50Hz.

Pole changing motor

This series of motors are used for general mechanical equipment without special requirements, such as agricultural machinery, food machinery, fan, water pump, machine tool, mixer, air compressor, etc.It has 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 standards.B class insulation is adopted, the shell protection grade is IP44, and the cooling method is IC411

Pole changing motor

Voltage, frequency and working mode:

Frequency: 50 hz, 60 hz

Voltage: 380V/ 220v, 380/440v, 380/660v (variable voltage to be customized)

Connection: power in 3 kilowatts and below for Y connection, 4 kilowatts and above for delta connection

Working mode: S1

Insulation grade: grade B, grade F

Protection grade: IP44, IP54 or IP55

Note: imported bearings and driver fixed bearings are available upon request

Pole changing motor

Conditions of use:

This series of motors can operate continuously according to rated power under the following conditions:

(1) elevation: not more than 1000 meters;

(2) the ambient air temperature changes with the season, but not more than +40℃.

Through optimization design and process improvement,QA series motor noise, vibration has been greatly reduced and reached the international advanced level.

Pole changing motor

1. High performance protection level

The standard design protection grade of pole changing motor is IP55, which can provide higher protection grade according to customers' requirements.

2, suitable for wide voltage use

The design of pole changing motor takes into account the voltage variation in different areas, so that pole changing motor can adapt to multiple areas and ensure the user performance.

Pole changing motor

3, improve the insulation grade, increase the service life of pole changing motor

The standard motor adopts F grade insulation structure, which improves the service life of pole changing motor and increases the reliability of pole changing motor.

4. High efficiency

pole changing motor adopts optimized design, has high efficiency, can produce considerable energy saving effect.

5. Reasonable structural design

Pole changing motor

Flexible lead line direction, beautiful motor shape, heat dissipation rib design into vertical and horizontal distribution, end cover, junction box, wind cover are all new design, beautiful appearance.

The operation 

3.1. During operation, the surface of pole changing motor should be kept always clean, and the air inlet should not be blocked by dust fibers.

3.2. The deviation of power supply frequency from rated frequency shall not exceed l %;The supply voltage shall not exceed 5% from the rated voltage.

3.The current of pole changing motor is not allowed to exceed 10% of the rated current.

3.Continuous operation of pole changing motor is not allowed to be overloaded for a long time.

Pole changing motor

3.There should be no intermittent or abnormal sound or vibration when pole changing motor is running under no load or load.

3.6. When the thermal protection device and short-circuit protection device of pole changing motor operate continuously, the cause of fault should be checked (whether it is from pole changing motor or overload or the setting value of the protection device is too low), and the fault should be eliminated before it can be put into operation.

3.During operation, use a thermometer to measure the temperature rise of the cabinet, generally no more than 75℃.

Pole changing motor

3.8. Good lubrication should be ensured in the running process of pole changing motor bearing. Generally, pole changing motor should run for about 2()00H.If it is found that the bearing is overheated (the temperature rise of the bearing should not exceed 95℃ in general) or the grease deteriorates, the grease should be replaced in time. The old grease should be removed before replacement, and then the oil of the bearing and bearing cover should be washed with gasoline

The ZI 1 3 lithium base grease is then filled with either l / 2(2 poles) or 2/3 (4, 6, 8 poles) of the cavity between the inner and outer rings of the bearing.

3.9 when the bearing clearance reaches the following limit wear clearance value, the bearing should be replaced in time.

Pole changing motor
Rated voltage: 380V
Rated current: 0.8A
Rated speed: 2900/1440/960/750 rpm
Rated torque: 15.4NM
Dimensions: 132mm
Protection level: IP55
Weight: 60KG
By optimizing the design and process improvement, the QA series motors have greatly reduced noise and vibration and reached the international advanced level.

Pole changing motor
1, high performance protection level
The standard design protection of pole changing motor is IP55, which provides a higher degree of protection according to customer requirements.
2, for wide voltage use
pole changing motor design takes into account the voltage variations in different regions, adapting pole changing motor to multiple regions and ensuring user performance.
3, improve the insulation level and increase the service life of pole changing motor
The standard motor uses Class F insulation to increase motor life and increase motor reliability.
4, high efficiency
pole changing motor is optimized for high efficiency and produces considerable energy savings.

Pole changing motor
5. Reasonable structural design
Flexible lead-out direction, beautiful motor shape, frame heat-dissipation ribs are designed to be vertical and horizontal, and the end cover, junction box and windshield are all new designs, and the shape is unique and beautiful.
Principle of shifting principle
The shifting of pole changing motor takes the way of changing the winding connection, that is to say changing the speed of the pole by changing the number of pole pairs of the rotating magnetic field of pole changing motor.
Two speed pole changing motor (fan), usually low speed, sometimes the fan rotates at high speed, mainly by changing the winding connection mode of pole changing motor coil by switching the following external control lines.

Date

06 September 2019

Tags

AC Motor

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