1. The inverter should not be installed on the equipment with a sensation, because the main circuit connection screw in the inverter is easy to loosen, and many inverters are damaged due to this reason.
2. Wiring problem: It is best to connect the input terminal of the inverter to an air start, and the maintenance current should not be too large, so as to avoid the incineration in the event of a short circuit. The "N" terminus must not be grounded. Try not to be too long with the control line. Because this makes the control board susceptible to electromagnetic disturbance and malfunction, it will also cause damage to the control board, and it is best to use shielded wire beyond 2 meters long. The contactor with high current and frequent operation should not be installed next to the inverter, because it disturbs the inverter very much, and often makes the inverter malfunction (showing various problems).
3. It is best not to rely on the inverter itself to brake, but to add another brake electric yin or mechanical brake, otherwise the inverter is often impacted by the motor back electromotive force, and the fault rate will be greatly improved.
4. If the inverter often runs at a low speed below 15HZ, the motor should add a cooling fan!
5. Dust and moisture are the deadliest killers of inverters. It is best to install the inverter in the air-conditioned room, or in the electrical cabinet with a dust net, and clean the dust on the circuit board and radiator on time; If the inverter has been shut down for a period of time, it is best to blow the circuit board with a hair dryer before powering on.
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The internal accessories component of the power production circuit breaker
1. Auxiliary contact: the contact mechanically linked with the main circuit of the circuit breaker and the closing mechanism is mainly used for the display of the circuit breaker and the closing status, and is connected to the control circuit of the circuit breaker through the opening and closing of the circuit breaker to control or interlock its related electrical appliances. For example, output to signal lights, relays, etc.
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Safety precautions for LS inverters
1. When the power supply is now powered or the inverter is in operation, do not open the shell of the inverter. Otherwise, an electric shock may occur.
2. When the front cover of the inverter is opened, do not run the inverter. Otherwise, you may be subjected to ...
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The basic principle of motor protector selection - LS power production
The fundamental method of motor protector selection
At present, there is no unified standard for motor protectors on the market, and almost every manufacturer has its own type standard. In order to meet the needs of different customers, manufacturers derive many products with different uses, and a wide range of products for the majority of users to choose ...
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Application of servo motor - LS power generation
Quick to use:
There are three cables necessary for the operation of the motor: power cable; Motor power line, motor encoder line.
Control line interface X5:
Servo enable necessary pin C24V power supply (7,41) Servo enable SR ...
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Precautions for powering on the inverter after the LS power production holiday
1. During the holiday, low temperature can easily cause the equipment to be damp, check whether the electrical equipment is dry, whether there is moisture and condensation;
2. Check whether the grounding wire is loose and whether the cable is damaged by rodents and insects;
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Inverter circuit structure - LS generates electricity
The main circuit is the power replacement part of the power supply for the asynchronous motor, and the main circuit of the inverter can be roughly divided into two categories: the voltage type is to change the DC of the voltage source to the communication of the DC port of the inverter, and the filter is the capacitor. The current type is to change the DC of the current source to the communication ...
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Fault analysis of servo motors – LS power generation
1. Problem phenomenon: servo error OL, servo motor can not start, and there is abnormal sound problem analysis and possible causes:
(1) Bearing damage, foreign objects falling and stuck, stator magnet bursting and falling or moving tissue jamming caused by the motor itself.
(2) ...
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Distinguish between good and bad inverters - LS produces electricity
The quality of a thing is relatively speaking, the inverter as a power supply used to drive the motor to run, its function is to regulate the speed, under the premise of normal wiring, reasonable parameters, and no fault with the load, if the speed of the motor can be controlled according to the requirements, the shaking error is less than the equipment ...
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Communication control of inverter - power inverter
The communication control of the inverter is more complicated, so it is listed separately.
The communication control of the inverter is a control method for the operation, speed regulation and status indication of the inverter through the communication interface of the inverter.
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Maintenance and maintenance method of electric motor - LS generates electricity
1. Look: The normal operation of the motor has a great relationship with the surrounding environment. Therefore, during the daily inspection, check the water leakage and dripping conditions around the motor (which will cause the low insulation of the motor to form breakdown and burn out), and check whether the peripheral of the motor has affected its ventilation and heat dissipation ring.
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Practical common sense in the inverter industry - LS inverter
1. The low-voltage fuse cannot be used as an overload maintenance of the motor.
2. The additional voltage of the fuse must be greater than or equal to the operating voltage of the distribution line.
3. The additional current of the fuse must be greater than or equal to the ...
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The role of LS electric contactors
1. It is often used in electric motors as control targets.
2. It is used to control power loads such as factory equipment, electric heaters, working machines and various power units.
3. It has the effect of low voltage release protection.
4. It is suitable for frequent operation and long-distance control, and is an automatic operation.
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LS Electric's motion control system solution on pillow (horizontal) packaging machine
The pillow packaging machine mainly performs the operation of product forming, positioning, packaging and sealing, etc., and the equipment is composed of the packaging film shaft that provides the packaging film, the feeding shaft that provides the material, the cutter shaft that performs the sealing and cutting operation and the discharging shaft after the product packaging is completed, and the equipment structure diagram is as follows:
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Inverter load test run step - LS power generation
1. Manually operate the work stop button of the inverter panel, investigate the work stop process of the motor and the display window of the inverter to see if there is any abnormal phenomenon.
2. If the inverter presents an overcurrent maintenance action during the process of starting P to abort the motor, ...
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Inverter exception handling method - LS power generation
1. The working temperature of the inverter is high
1. Check whether the ambient temperature of the inverter is too high;
2. Check whether the cooling fan inside the device is working properly;
3. Check whether the ventilation pores and mask grilles are blocked;
4. Check if the load is too heavy.
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LS power generation installs the switching power supply step
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Precautions for the selection of peripheral equipment for LS power inverter
The peripheral equipment of the inverter mainly includes cables, contactors, air switches, reactors, filters, braking resistors, etc. Whether the selection of the peripheral equipment of the inverter is correct and suitable also directly affects the normal operation of the inverter and the service life of the inverter.
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The inverter generates electricity through the principle of intermediate DC bus power supply - LS
Most of the inverter manufacturers produce traditional inverters, and their control systems and other power supplies are directly provided by single-phase or three-phase power grids. However, due to the increasing use of VFDs and servo motor amplifiers, a new power supply may emerge: powered by the central DC bus of the VFD. This electric ...
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The Importance of Welding in Inverter Maintenance – LS Generates Electricity
Whether the welding skills of the inverter repair personnel are excellent is directly related to the quality and results after repair. If the welding quality is not up to standard during repair, the pins of the components will be broken when the components are disassembled, the printed circuits on the PCB will be damaged, the components will not be soldered firmly when the components are installed, and the two components ...
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Analysis of the problem of excessive current of LS three-phase motor for power generation
First, the power supply problem
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When the power supply voltage is too high, the motor back electromotive force, magnetic flux and magnetic flux density all increase. Since the magnitude of the iron loss is proportional to the square of the magnetic flux density, the iron loss increases, resulting in overheating of the core. And the increase in magnetic flux causes ...
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