Inverter (Mitsubishi inverter) is composed of many electronic parts, such as semiconductor components, etc., in the application and protection involves the replacement of a related component, because of the composition or physical characteristics of the inverter, it will deteriorate in a certain period of time, thus reducing the characteristics of the inverter, and even causing problems. Therefore, it is necessary to implement regular substitutions for the sake of preventive protection. The inverter is replaced at a regular interval
1. Replace the cooling fan
The main circuit of the inverter is cooled by the semiconductor equipment cooling fan to accelerate the heat dissipation and ensure the normal operation below the allowable Wendy. The life of the cooling fan is limited by the bearing, which is about 10000-35000h. When the drive is running continuously, the fan or bearing needs to be replaced once after a few years. The replacement period of the cooling fan is greatly affected by the ambient temperature, and the cooling fan must be replaced immediately when abnormal sound and abnormal oscillation are found.
2. Replace the capacitor
Large-capacity electrolytic capacitors are used in the intermediate DC circuit, and their performance deteriorates due to the influence of factors such as pulse current. Deterioration is greatly affected by the ambient temperature and operating conditions, under normal circumstances, the service cycle is about 5 years, and the deterioration of the capacitor develops rapidly after a certain time, so the length of the view circumference is one year, and the number of life is less than half a year.
3. Replace the timer
The timer will change greatly after several years of use, so replace it after checking the action time.
4. Replace the fuse
The rated current and load current of the fuse are large, and the life expectancy is about 10 years under normal operating conditions, and it is necessary to check the protection and even replace it at this time.
5. Replace relays/contactors
After the relay and contactor reach the required cumulative number of switching times, contact defects occur, and they need to be reviewed and replaced.
Secondly, knowing the meta-equipment that may need to be replaced, here is a simple make-up of the basic requirements for replacing the meta-equipment.
1) Find out the basic parameters and appearance of the equipment to be replaced. The basic parameters include the rated operating current, the capacitance of the capacitor, the resistance value of the resistor, the value of the GTR Darlington device (current amplification factor), the switching characteristics of the IGBT (including IPM) device, and the saturation voltage. The shape requirements include the external size, terminal orientation and installation method, etc., and then replace the required equipment according to the same requirements.
2) All connectors should be recorded or marked when disassembled, so as to avoid misplacement during replacement or rehabilitation.
3) The contact surface between the power equipment and the radiator should be evenly coated with thermal grease and fastened with screws.
In most cases, the machine is in a running state, and when the machine is not running, it is necessary to properly keep the inverter.
1) Storage
The room should be boring, no direct sunlight, no corrosive gases, and no dust; The relative humidity is 20%-90% and there is no frost; The temperature is between -10 and 30 °C (if the temperature is about 40 °C, the storage period should not exceed 6 months; About 50°C, the storage period does not exceed 3 months).
2) Protection
Because the main circuit and control circuit of the inverter use more electrolytic capacitors, if it is not necessary for a long time, the leakage will be added, the withstand voltage will drop, that is, the accelerated deterioration (the higher the temperature, the faster the deterioration), therefore, at least once a year, the external power supply is added, so that the correction of the energizing time is 30-60min, the characteristic is that only the inverter monomer is energized (do not have to be connected to the motor), and the input end of the inverter can be connected to the power supply.
|
More on that
|
Mitsubishi FX series PLC fault diagnosis method
1. Power indication (LED indication) When power is supplied to the Mitsubishi PLC root unit, the [POWER] LED indicator light installed on the surface of the root unit turns on. If the power supply is closed but the [POWER] LED does not illuminate, please acknowledge the power wiring. In addition, if the same power supply has a drive sensor, etc. ...
|
|
Advantages and disadvantages of different output types of PLC – Mitsubishi
The three output types of PLC are: transistor output, thyristor output and relay output, what is the difference between these three different output types?
(1) Transistor output:
The big advantage is that it is accustomed to high-frequency action, and the echo time is short, generally about 0.2ms, but ...
|
|
Introduction to Mitsubishi PLC network structure
1. The equipment layer/fieldbus CC-Link equipment layer is a field network that connects PLC and other control equipment, sensors and drive equipment, which is the lowest layer of the entire network system. The CC-Link fieldbus connection is adopted, and the number of wiring is greatly reduced, and the maintainability of the system is improved. Combine...
|
|
Mitsubishi Electric CNC numerical control system grounding specification
What is the effect of machine tool grounding?
1. Insist that the machine shell and the ground insist on the same voltage.
2. In the event of abnormal external voltage or leakage, the maintenance personnel and the machine tool will not be damaged electrically.
3. Avoid damage to CNC equipment caused by external voltages such as surges.
4. ...
|
|
Performance comparison of Mitsubishi servo motors
First, the control accuracy is different
The step angle of the two-phase hybrid Mitsubishi servo motor is generally 1.8 ° and 0.9 °, and the step angle of the five-phase hybrid Mitsubishi servo motor is generally 0.72 ° and 0.36 °. Mitsubishi servo motors, which are also some functions, have a smaller step angle after segmentation.
...
|
|
The cause of the failure caused by OC - Mitsubishi inverter
1. Aging of drive circuit
Due to the long-term use, it will inevitably lead to the aging of components, and then cause the drive waveform to be distorted, and the output voltage will be unstable, so OC alarm often appears as soon as it is running.
...
|
|
Mitsubishi PLC communication detection steps
When you are ready to communicate through AJ71QE71, perform the ping procedure in MS-DOS mode to check if the connection is correct before the Mitsubishi PLC's GPPW starts to communicate. Support communication with Weilun touch screen through serial port.
Under...
|
|
PLC commonly used physical memory - Mitsubishi
(1) Random Access Memory (RAM) The user can read out the content of the RAM with the programming device, and can also write the user program to the RAM, so the RAM is also called read/write memory. It is volatile memory, and when its power is interrupted, the stored information is lost. The use of the computer's memory module ...
|
|
Mitsubishi servo motor shaft failure causes and solutions
1. The cause of the failure
(1) Unreasonable mechanical design leads to excessive radial load force;
(2) The load side is stuck, or the moment of severe overload;
(3) The motor and reducer are not centered when installed;
2. Fault cleaning
...
|
|
Mitsubishi servo system common alarms and solutions
The use of Mitsubishi AC servo system is mainly composed of three series: MR-ES, MR-J2S, MR-J3. In general, the cause of the fault can be preliminarily determined based on the code displayed on the servo drive, and then troubleshooting:
1、AL. E6 - Indicates ...
|
|
Manipulator Fault Repair - Mitsubishi Robot
1. Speak before you start
With regard to defective electrical equipment, it is necessary not to rush to start, but to inquire about the passage and defective phenomena that cause defects. For unfamiliar equipment, you should also understand the circuit principle and structural characteristics, and follow the corresponding rules. Before dismantling, it is necessary to fully understand each electrical department ...
|
|
Introduction to the selection conditions of Mitsubishi A840 series inverters
Q: When will I choose the A840 series inverter?
A: A800 series inverters are generally used in heavy-duty occupations, such as lifting occupations, mixer occupations will use A800 series. At the same time, it is a vector inverter, so customers need to do closed-loop speed control, torque control may ...
|
|
The difference between a Mitsubishi servo motor and a stepper motor
First, the control accuracy is different
The step angle of the two-phase hybrid stepper motor is generally 1.8° and 0.9°, and the step angle of the five-phase hybrid stepper motor is generally 0.72° and 0.36°. There are also some high-performance stepper motors that have a smaller step angle after being subdivided. Communicate the control of servo motor ...
|
|
AD PLC realizes the two basic points of control - Mitsubishi
PLC is based on electronic computers, but it is not the same as ordinary computers. Generally speaking, computers only consider the information itself when translating input and output information. As long as the human-machine interface is good, the input and output of information can be completed. And the PLC should also consider the information in and out ...
|
|
Application of Mitsubishi FX PLC in speed measurement
[Example] a motor is equipped with an optical encoder (the optical encoder is coaxially installed with the motor), and the FX2N-32MT is used to measure the speed of the motor.
【Solution】
Because the photoelectric encoder is coaxially installed with the motor, the ...
|
|
The working principle of the servo motor of the Mitsubishi CNC system
1. The servo mainly relies on the pulse to position, basically it can be understood in this way, the Mitsubishi CNC system maintenance servo motor receives a pulse, and it will rotate the angle corresponding to the pulse, so as to achieve displacement, because the servo motor itself has the function of sending out pulses, so the servo motor ...
|
|
Programmable Controller System Design and Debugging Steps – Mitsubishi PLC
The main steps in the planning and commissioning of the programmable manipulator application system
(1) In-depth understanding and analysis of the process conditions and control requirements of the controlled target
a. The controlled target is a controlled mechanical, electrical equipment, production line or ...
|
|
Mitsubishi PLC program lost backup program write method
The reasons for the loss of the PLC program are the lack of battery power supply for the user's saved program, the internal circuit of the PC, the motherboard burned out due to the impact of external high voltage such as lightning strikes, etc., which will be encountered in our PLC control system. For example, the old type of plc such as the FX2N series, which has been discontinued...
|
|
Analysis of PLC and inverter connection problems - Mitsubishi
When the inverter is used to form an active control system for control, in many cases, the PLC and the inverter are used together, and how to correctly connect the PLC and the inverter together has become the key to the success of the system.
1. PLC switch command signal input
Inverter input ...
|
|
Mitsubishi servo about the selection of robot methods
When evaluating which process is suitable for which approach in the production environment, it is important to carefully consider the problem you want to deal with and consider all the costs that the robot can save: cutting waste, improving efficiency, improving yield, improving safety, or reducing labor costs. These costs ...
|
|
Contact
working hours
