AC induction squirrel cage three-phase asynchronous motor
Basic knowledge of electric motors
1. Types of motors
2. Working principle of three-phase asynchronous motor
3. Composition of three-phase asynchronous motors
4. Technical parameters related to the motor
4.1 Basic structural types
4.2 Power level and installation dimensions
4.3 Main performance indicators
Types of motors
According to the conversion method of energy
a) Generator
b) Electric motor
According to different rotational speeds
a) Synchronous motor
b) Asynchronous motor
According to the difference in power supply voltage
a) Safe voltage motor 36V
b) Low voltage motor 220-690V
c) Medium voltage motor 1000-6000V
d) High voltage motor above 6000V
Types of motors
According to the different rotors
a) Wound rotor motor
b) Squirrel cage motor
According to the different phases of the power supply
a) Single-phase motor
b) Three phase motor
According to the different currents passing through
a) DC motor
b) AC motor
The motors produced by our company are:
AC induction squirrel cage three-phase asynchronous motor
The working principle of three-phase asynchronous motors
Using the principle of electromagnetic induction, alternating three-phase electricity
After flowing through the stator winding of the motor, it flows inside the motor
Generate a rotating air gap magnetic field and generate it on the rotor guide bar
Generating induced current, rotor bars with current and rotation
Magnetic field interaction generates electromagnetic torque, driving the motor
Rotate to achieve the conversion of electrical energy into mechanical energy.
Composition of three-phase asynchronous motors
a. Stator
b. Rotor
c. Front and rear end covers
d. Fan, hood
e. Junction box
f. Bearings
The basic structural type of the motor
a. Shell protection level: represented by IP For example, IP23 and IP55
b. Cooling method: represented by IC For example, IC410 and IC411
c. Installation structure: B3, B35, B5
d. Installation method: IMB3 (B3) axis extends to the left
IMV1 (B5) axis extends downwards
IMV36 (B35) axis extends upwards
a. The protection level of the motor
The first characteristic number is the degree of solid resistance.
The second characteristic number is the degree of waterproofing.
Example: IP55
The first characteristic number 5: represents the dustproof motor
Meaning: It can prevent touching or approaching the charged or rotating parts inside the shell
Insufficient dust intake to affect the normal operation of the motor
The second characteristic number 5: represents the anti water spray motor
Meaning: Water spray from any direction should have no harmful effects
b. Power level and installation dimensions
a. Power level score:
0.18, 0.25, 0.37, 0.55, 0.75, 1.1
1.5, 2.2, 3, 4, 5.5, 7.5, 11, 15
18.5, 22, 30, 37, 45, 55, 75, 90
110, 132, 160, 200, 250, 315
b. Installation dimensions:
71, 80, 90, 100, 112, 132, 160
180, 200, 225, 250, 280, 315, 355
The main products of ABB motors
a. M2QA and QA series three-phase asynchronous motors
b. M2QA and QAD series variable pole variable speed three-phase asynchronous motors
c. YDFW, YDFW2 series low noise three-phase asynchronous motors with external rotors
d. QAEJ and MQAEJ series electromagnetic braking three-phase asynchronous motors
e. DF and GDF series (IP23) three-phase asynchronous motors
f. QABP series variable frequency speed regulation three-phase asynchronous motor
g. M2QA series marine three-phase asynchronous motor
h. SL (SY, SYU, PLD) series train air conditioning three-phase asynchronous motor
i. M2SV series flue motor
M2QA (QA) series motors
The center height is 71-355, and the power ranges from 0.18 to 315kW.
Adopting F-level insulation and B-level temperature rise assessment. Can increase lifespan by 15-20%.
Motor with wide voltage and dual frequency design. There is a CE mark on the nameplate.
Efficiency meets European Level II standards.
The protection level is IP55.
Using imported NSK or SKF bearings (QA series are high-quality domestic bearings).
The junction box is located at the top. The outlet hole of the junction box is Pgx double hole (QA is metric single hole).
There is a device on the front cover of the motor to reduce axial displacement (referring only to M2QA).
There is a threaded hole on the end face of the shaft extension.
QABP series variable frequency motor
By adjusting the input frequency of the motor through a frequency converter, the motor speed can be changed to achieve stepless speed regulation
The center height is 71-315, and the power ranges from 0.18 to 200kW.
The input voltage is 380V.
Variable frequency range: -5-100Hz.
-5-50Hz is a constant torque output.
-50Hz or above is a constant power output.
F level insulation (using high-quality imported enameled wire); IP55. There is a CE mark on the nameplate.
Using imported NSK or SKF bearings.
The junction box is located at the top. The outlet holes of the junction box are metric single holes.
Encoders, brakes, thermistors, etc. can be installed as needed
QAD (M2QA) series variable pole variable speed motor
The motor can achieve stepwise speed regulation by changing the connection method to change the speed.
The center is 80-280 meters high.
Applicable standards: IEC, BS, AS, DIN, and GB
The insulation level is F; The protection level is IP55. There is a CE mark on the nameplate.
The junction box is located at the top. The outlet holes shall be in accordance with the corresponding standard series.
Bearing: QAD with domestically produced high-quality bearings
--M2QA equipped with imported NSK or SKF bearings
YDFW/YDFW2 series external rotor motor
A three-phase motor for air conditioning with low noise, rotating shell, and fixed shaft
Power range: 0.25-7.5kW
The protection level is IP54; There is a CE mark on the nameplate
YDFW is a regular type; YDFW2 is a speed regulating type
Insulation level: YDFW adopts B-level insulation structure
YDFW2 adopts F-class insulation structure
Bearing: YDFW selects domestically produced high-quality bearings
YDFW2 selects NSK imported brand bearings
The YDFW2 motor can adopt voltage regulation and speed regulation; The speed regulation range is 70% to 100% of the rated speed
Comparison Table of Main Structure and Performance of the Product
model
Project M2QA QA QY YU Y
Flat heat dissipation ribs of the machine base
Row distribution
Parallel heat dissipation ribs
distribution
Heat dissipation rib assembly
Radiant
Radiating ribs
Shooting shape
Radiating ribs
Shooting shape
AC induction squirrel cage three-phase asynchronous motor
The junction box is located at the top, top, and next to the outgoing line
Material of junction box: cast iron steel plate, cast iron steel plate, cast iron steel plate, cast iron
Outlet hole German metric system PG style British system G pipe thread metric system
Voltage, frequency wide voltage
Dual frequency wide voltage wide voltage
Dual frequency, single voltage, single voltage
Comparison Table of Main Structure and Performance of the Product
Efficiency European Level II Standard
accurate
European Level II standard
accurate
Q/JBQS10-99 Q/JBQS4-97 ZBK22007-
eighty-eight
Insulation level F (B assessment)
F (B assessment)/
B
F (B assessment) B
B
Protection level IP55 IP55 IP54 IP54
Nameplate with CE mark with CE mark with CE mark without CE mark without CE mark
Nameplate material: stainless steel, copper, stainless steel, copper, aluminum
Bearing NSK or SKF domestically produced NSK or SKF NSK or SK-F domestically produced
Is the center hole of the shaft extension present
Product replacement status
New product model M2BA M2QA M2QA (B-level) QA
Substituted product models QU QY or YU YU Y
Numerous choices to meet user needs
1. Install thermistor 2. Install dust seal ring
3. Install heating belt 4. Install oil proof sealing ring
5. Install oil nozzle 6. Install water splash ring
7. Special colors 8. Special shaft extensions, special flanges
9. Three protection requirements (moisture proof, mold proof, and salt spray proof)
Derived series
a. Special structure derivation: generally represented by endnote feature codes
For example: special shafts, special flange derivatives - J4
With thermistor -- RB
AC induction squirrel cage three-phase asynchronous motor
b. Special environment
For example, the code for "marine" is H
The code for "use in humid and hot zones" is TH
c. Combination of Several Mechanical Properties
For example, pole changing brake motor (M) QADEJ
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Comparison between ABB Motors and Domestic Motors
a. Beautiful and elegant appearance, unique design
b. Excellent motor quality
c. High efficiency, reaching the European Level II efficiency standard
d. Wide voltage design
e. Low actual noise
f. The QA and M2QA nameplates have CE markings
g. A sound after-sales service system
h. Has ABB brand effect
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Selection of motors
a) According to the nature of the mechanical load and production process, start and control the motor
Select the type of motor required for movement, reverse rotation, speed regulation, etc.
b) Based on load torque, range of speed changes, and frequency of starting, etc
Requirements, reasonable selection based on motor temperature rise, overload capacity, and starting torque
Selecting motor power to ensure reasonable power matching, striving for safety, reliability
Economy.
Selection of motors
- c) According to the environmental conditions of the place of use, such as temperature, humidity, dust
Corrosion and flammable and explosive gases should be protected by appropriate methods.
- d) Determine the voltage level of the motor based on the user's grid voltage.
- e) We also need to consider factors such as product price, operating costs, installation and maintenance
Su.
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Starting and maintenance of motors
- When closing, if the motor does not rotate, it should be quickly turned on
Quick pull brake to avoid burning out the motor
- Pay attention to observation after starting the motor
Operation status (equipment and motor)
Before starting
- Verify nameplate data
- Is the mechanical assembly in good condition
- Is the motor wiring correct
- Insulation resistance>=0.5M Ω
At startup
Monitoring of motor operation
- Monitoring of current, voltage, and temperature (bearings)
- Sound monitoring during operation
- Shutdown handling: refers to the occurrence of unexpected situations
Maintenance of motors
- Daily inspection
- Regular inspections
(The general maintenance period is one year)
- Operation inspection
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Common faults of motors
- Starting fault
- Overheating fault
- Excessive no-load current
- Bearing failure
- Fault of winding burnout
- Other faults
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General faults of motors and their troubleshooting
General faults of motors and their troubleshooting methods
Number fault situation fault cause troubleshooting method
one
Motor unloaded
Time cannot rise
move
AC induction squirrel cage three-phase asynchronous motor
- Power outage in the power supply line
One of the three phases of the stator has an open circuit
- Low power supply voltage
- Check the voltage between the connecting wires
- Check the fuse and all phase power supplies
- Check voltage
two
The motor has
Unable to load time
start
- There is a turn to turn short circuit in the stator winding
2 Overload
3 Mechanical faults
- Check the resistance and current of each phase
- Check the motor load current
- Check the mechanical parts
- Motor overheating
- Short circuit between turns of motor stator winding
- Power supply voltage too high or too low
- Motor overload
4 Connection errors
- The ambient temperature is too high
- Check the stator winding
- Check the power supply voltage
- Check the motor load current
- Correct wiring
- Improve insulation level
General faults of motors and their troubleshooting methods
four
Three phase current
Imbalance
Short circuit between turns
Unbalanced three-phase resistance
- Repair winding
- Repair or replace the stator
five
No load current
Too large
- The power supply voltage is too high
- Misalignment of stator and rotor cores
3 three-phase voltage imbalance
- Unbalanced three-phase resistance
- Check the power supply
- Re press and install
- Check the power supply
- Measure three-phase resistance
six
insulation resistance
Low or breakdown
- Insulation aging or damage
- The winding is damp
- Motor overheating
4 Unclean
- Insulation maintenance
- Disassemble, dry or treat before reuse
- Disassemble for maintenance to prevent further heating
Blow the interior clean with air
seven
The motor is abnormal
sound
- There is abnormal noise in the bearing
2 Electromagnetic sound
3 Internal scratch sound
- Replace bearings
- Check the three-phase voltage
- Disassemble for maintenance
General faults of motors and their troubleshooting methods
8 bearing failure
- Damaged or defective bearings
- Poor assembly
- The centerline of the coupling is not straight
- Lubricating grease deteriorates or contains impurities
- The voltage during the speed regulation process is too low
- Replace bearings
- Check the assembly of bearings and front and rear end caps
situation
Triple calibration centerline
- Clean the bearings and replace the lubricating grease
- Control the minimum voltage
nine
User usage
Not appropriate
1 Overload
Two sets of fan unit motors
Forward and reverse phenomena
- Dynamic balance disrupted
- Reduce air volume and pressure, adjust to
Rated output
- Change the motor direction
- Recalibrate dynamic balance with impeller
Acceptance of motors
1.1 Inspection before unboxing.
1.2 Inspection after unboxing.
- a) Verify nameplate
- b) Verify installation type
- c) Mechanical inspection
- d) Insulation resistance measurement
2.1 Wiring method inspection
2.2 Power on no-load operation
2.3 Load operation
1、 Pre installation inspection 2. Post installation inspection
QAEJ, MQAEJ series
Characteristics of three-phase asynchronous motor with electromagnetic braking
QAEJ and MQAEJ series electromagnetic braking three-phase asynchronous electric
The motivation is fully enclosed, self cooling, squirrel cage type, with attachments
A three-phase asynchronous motor with a DC electromagnetic brake. electric
The machine has fast braking, accurate positioning, and convenient use
Easy maintenance, no axial movement of the rotor during braking or starting
The brake is equipped with a manual release device.
Product features
YDFW, YDFW2 series external rotor low noise three
Different step motors are fully enclosed squirrel cage asynchronous
Electric motors are available in two types: regular and variable speed.
The ordinary type is YDFW, and the motor adopts a B-level insulation structure,
Select domestically produced high-quality bearings for bearings; The speed control type is
YDFW2, due to the soft characteristic design of the motor, can be achieved through compression methods
Motor series variable speed to adapt to the requirements of variable system loads, the motor adopts F-class insulation
The edge structure uses NSK imported brand bearings, which improves the service life of the motor,
Increased motor reliability. The motor has the characteristics of fixed shaft and rotating shell, and the electric
The machine casing can be directly connected to the fan impeller, and it is a horizontal double suction centrifugal fan and a vertical fan
The centrifugal roof ventilation fan is the most ideal matching power source, widely used in various ventilation systems
Wind equipment
1、 Bearings
1) Classification
Structurally: open and closed;
Functionally: ball bearings, roller bearings, thrust bearings, etc
2) Suffix code
VV - Non contact sealing ring type
DDU - Contact sealing ring type
ZZ - Dust cover type (non-contact)
3) Clearance
C1-C2C-C0-C3-C4-C5
4) Lifetime: 20000 hours; 40000 hours
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2、 Product code
M2QA132S2B M2QA131102-ADC
3、 Environmental temperature and altitude
Environmental temperature: -15 ° C to+40 ° C
Altitude: not exceeding 1000m
4、 Appearance and installation dimensions
Installation of large motor V1, etc; Small flange (two types)
5、 Protective devices
PTC (Thermistor); Thermal switch
Pt100 (second or third line), Pt1000 (second or third line); thermocouple
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