the reason:
1). Excessive load
2). Two-phase operation
3). Air duct blocked
4). Increased ambient temperature
5). Short circuit between phases or turns of stator windings
6). The stator winding is grounded
7). The power supply voltage is too high or too low
Repair method:
1). Reduce the load or choose a large-capacity motor
2). Clear the air duct
3). Take cooling measures
4). Check the power supply voltage at the input end with a multimeter and voltmeter
the reason:
The winding is damp, the insulation is aging, or the lead wire collides with the junction box shell;
Repair method:
Corresponding motor repair method: dry the motor shell, replace the winding;
the reason:
1). Rotor imbalance
2). Shaft bending
3). Unbalanced belt pulley
4). Uneven air gap produces unilateral magnetic pull
Repair method:
1). Correct dynamic and static balance
2). Straighten the shaft or replace it ,when shaft is not severely bent, it can be turned to 1-2mm and then fitted with a sleeve
3). Correction balance
4). Re-adjust
4.Motor failure for current three-phase unbalanced
the reason:
1). The power supply voltage is seriously insufficient
2). Three-phase turns are not equal
3). Internal wiring error
Repair method:
1). Check the power supply voltage
2). Replace or handle the motor
3). Correct the wiring
the reason:
1). Large air gap between stator and rotor
2). Too few turns of stator winding
3). Improper assembly
Repair method:
1). Adjust and reduce the air gap
2). Re-verify and bypass
3). Reassembly
the reason:
1). The stator gets wet;
2). Excessive dust;
3). Insulation damage;
4). Insulation aging;
Repair method:
1). Drain and remove moisture;
2). Clean up dust ;
3). Repair;
4). Replace;
1). Overload
2). Overpressure
3). Lack of phase
4). Wrong wiring
5). Improper drive parameter settings
6). The ambient temperature is too high
7). The cooling device fails
8). Physical damage
When the winding fails, a part of the servo motor will be short-circuited, and the countermeasures to internal burning of the motor are:
1). Do not exceed the rated load for a long time when using the servo motor
2). Monitor current and current accumulation over time
3). Monitor the winding temperature
4). The rotor and shaft are different from asynchronous motors. The rotor of a servo motor is usually composed of permanent magnets. The permanent magnet pieces are fixed on the shaft of the motor by means of facing or embedding.
1). Increase the mechanical rigidity and reduce the inertia of the system, and reduce the response time of the mechanical transmission parts, such as replacing the V-belt with a direct screw drive or using a gear box instead of the V-belt;
2). Reduce the response speed of the servo system and reduce the control bandwidth of the servo system, such as reducing the gain parameter value of the servo system.
the above is only one of the causes of noise and instability. For different reasons, there will be different solutions, such as noise caused by mechanical resonance. In the servo, methods such as resonance suppression and low-pass filtering can be adopted. In short, noise and the instability are basically not caused by the servo motor itself.
Other problem solving skills of servo motor
The tolerance range set by the system is small; the servo system gain is set improperly; the position detection device is polluted; the cumulative error of the feed transmission chain is too large;
02/27/2021
The temperature of the motor is too high or the motor is faulty with smoke the reason: 1). Excessive load 2). Two-phase operation
02/27/2021
Before wiring, initialize the parameters. On the control card: select the control method; clear the PID parameters; let the default enable signal turn off when the control card is powered on; save this state to ensure that the control card is in this state when it is powered on again.
09/23/2020
With the development of modern industry and the improvement of automation level, various industries have higher and higher requirements for air supply, purification level, automatic control, and continuous and reliable air supply of air compressor stations.
09/23/2020
Basic knowledge is very important for sheet spray work, and the same is true during equipment installation. When installing compressed air pipelines, everyone must pay attention to the following precautions:
09/23/2020
1. Design intent For cost reasons, the control systems used in the air compressor manufacturing industry for a long time have been controlled by single-chip microcomputers, and digital tubes indicate working status and indicate parameter values
09/23/2020
It has become an inevitable trend to use highly reliable screw compressors to replace piston compressors with many wearing parts and poor reliability. Japan's screw compressors accounted for only 27% in 1976, and rose to 85% in 1985; the current market share of screw compressors in western developed countries is about 80%, and it maintains an upward trend.
09/23/2020
Air compressor classification, working principle and air compressor selection The air compressor is the main body of the air source device. It is a device that converts the mechanical energy of the prime mover (usually an electric motor) into gas pressure energy, and is a pressure generating device for compressed air.
09/22/2020
1 The rapid development of CNG As of 1999, there were nearly 70 CNG stations in 12 demonstration provinces and cities across the country, and the number of clean vehicles (NGV) was less than 10,000. After four years of rapid development, as of October 2003, there were 16 stations nationwide.
09/22/2020
1 Introduction The catalytic cracking rich gas compressor is a kind of compressor, which is very representative. For this reason, the catalytic cracking rich gas compressor is taken as an example to discuss the calculation method of the surge line of the rich gas compressor control system.
09/22/2020
The compressor can convert the mechanical energy of the motor or internal combustion engine into the pressure of compressed air. Air compressors are divided into two categories: reciprocating and rotary. The following figure shows the basic types of compressors:
IWAYA DENKI Water Pump 25CJT0752
Panasonic Servo Motor MHMF022L1V2M
Honeywell Solenoid Valve VE4025B1045
ROTEN Mechanical Seal 8E5K-22-X
IDEC PLC FC6A-J2C1
OMRON Relay G6K-2F-RF-S-DC3
HONGFA Relay HF3F-L-9-1HSL12T
SHAKO Air Cylinder JCDA50B50
Pelko Motors Fan P1238H48BPCB8
Yamatake Switch 8LS3-J