1. The inverter should not be installed on the equipment with vibration, because the main circuit connection screw in the inverter is simply loose, and many inverters are damaged due to this reason.
Second, the wiring problem: the input terminal of the inverter is connected to an air and the initial maintenance current should not be too large, so as to avoid the incineration of a short circuit will not be too severe. The "N" terminus must not be grounded. Try not to be too long with the control line. Because the control board is simply disturbed by electromagnetic waves and malfunctions, it will also cause damage to the control board, and it is best to use shielded wires beyond 2 meters long. Do not be equipped with a contactor with high current and often action next to the inverter, because it disturbs the inverter very much, and often makes the inverter malfunction (showing various faults).
3. The inverter that often needs to park in an emergency should not rely on the inverter to brake itself, but add a braking unit or use mechanical brakes, otherwise the inverter is often impacted by the motor back electromotive force, and the fault rate will be greatly improved.
Fourth, if the inverter often runs at a low speed of 15Hz; Below, the motor should be equipped with a cooling fan!
Fifth, dust and moisture are the deadly killers of inverters. It is best to install the inverter in an air-conditioned room, or in an electric 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.
6. When the heat dissipation fan is broken, it will announce overheating maintenance, and it should be replaced when the fan has a sound.
7. Some factories are powered by generators, the voltage is unstable, the inverter is often damaged, and the generator is equipped with voltage stabilization or overvoltage maintenance devices, which plays a very good role.
8. Lightning protection is also very important. Although it is rarely generated, when the drive is struck by lightning, it will be very damaged. The inverter with constant pressure water supply is the easiest to be struck by lightning because it has a lightning pipe that extends into the sky.
9. In order to avoid electromagnetic wave disturbance, the input, output and control line of the inverter should be shielded wire, and the wiring method of the shield layer can not be wrong, otherwise the effect is opposite, and it is possible to cover it with an iron pipe, install a filter, and reduce the carrier frequency. We found that if the switch tube of the inverter switching power supply is a field effect transistor, its disturbance will be greater.
10. When the inverter is broken, don't hand it over to someone who has no maintenance experience to repair it! Otherwise, it may get worse and worse the more you repair! Sometimes it is about to fuse, you must check if there is a problem, some electricians have not experienced, immediately install a good fast melt (absolutely can not be replaced by copper wire), the result is that the inverter incineration is more ferocious. According to our experience, if the module is fast melting, most of the modules have problems, but the modules are bad and fast melting. Many inverter power modules and rectifier modules are interchangeable.
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(2) ...
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Variable frequency regenerative braking method - LS generates electricity
1. Energy consumption type
This method is to connect a braking resistor in parallel in the DC circuit of the inverter, and control the on/off of a power tube by detecting the DC bus voltage. When the DC bus voltage rises to about 700V, the power tube is turned on, and the regenerative energy is passed into the resistor.
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LS power production contactors are used in this area
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The role of LS electric contactors
1. It is often used in electric motors as control targets.
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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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Introduction to electrical equipment - LS Electricity
According to the requirements of safe, high-quality, reliable and economical operation of the production, transforming, transportation, distribution and use of electric energy in power plants and substations, the following electrical equipment is mainly included.
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Inverter is an important drive material in modern industrial production, as a power equipment, it is working hard all the time, so its fault rate is very high, and the rapid processing of inverter faults, to ensure the continuity of industrial production, is every maintenance electrician and on-site debugging of electricians.
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The principle and function of the power production contactor
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Operating regulations for power inverters
Maintenance & Installation
Work according to the weight of the product.
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Install according to the user manual.
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Basic introduction to transistors - LS produces electricity
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Interference phenomenon of LS power inverter
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