ZJSHUYI Common application fields of low-voltage inverters are as follow...

1. Fan: With the continuous development of the industry, the application of fans is becoming more and more extensive, especially in the chemical, stone, and textile industries that can be applied to fans. In the fan design, there is a problem of excessive air volume. When the air volume needs to be adjusted, throttling is generally used, that is, the damper adjustment method, which is unnecessary loss. After using frequency conversion speed regulation, it can be easily adjusted according to actual needs. Unnecessary losses are removed, and the power factor is improved at the same time, and the comprehensive power saving rate is above 30%. 2. Speed regulation machinery: In the machinery that needs speed regulation, such as: extruder, material feed regulation, conveyor belt, etc., basically use slip regulation motor, three-phase commutator motor or DC motor speed regulation, speed regulation of speed regulation motor Poor performance, poor speed stability, high failure rate and low efficiency. However, DC motors and commutator motors have complex structures, high failure rates, and high maintenance costs. Sparks are generated when they work, which is extremely unsafe. The speed regulation stability of the above motors is poor. If the above motors are replaced by asynchronous motors and variable frequency speed regulators, the efficiency can be greatly improved, the power saving, the maintenance amount is small, the safety and reliability, and the investment return period is short, which is extremely beneficial to improving the economic benefits of enterprises. favorable. In the field of low-voltage inverter applications, low-voltage inverters have been applied in all walks of life in my country, such as metallurgy, chemical industry, papermaking, machinery and other industries. More specific applications, small applications such as blowers, conveyors, feeders, mixers, grinders, pulverizers, paper cutters, calenders, extruders, valves, compressors, cooling pedals, plastics Machinery, elevators, various textile industries, etc.; large-scale application fields such as paper machines in paper mills, injection molding machines in mold factories, rolling mills in metallurgical plants, and fans, pumps, cranes, oil pipelines, etc. in chemical industries. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #VFD #frequencyconverter #acdrive #frequencyinverter #inverter #frequencydrive #acvfdvariablefrequencydrive #vfddriveprice #shuyitop #converter #inverters #vfds #vfdmarket #ZJSHUYI #Chinashuyi

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ZJSHUYI Maintenance requirements for frequency converters. www.shuyitop....

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Maintenance requirements in the day-to-day operation of the frequency converter 1. Check whether the cooling system is normal, and clean the dust of the air filter. 2. Check whether the screws, bolts and other fasteners of the inverter are loose, and perform necessary tightening; for the parts with soldering and crimping terminals, check whether there is corrosion, discoloration, cracks, damage, etc., and also check the frame Whether the structural parts are loose, whether the conductors and wires are damaged, etc. 3. Check whether the connection of the control circuit board is loose, whether the capacitor is leaking, whether the lines on the board are rusted, broken, etc. 4. Check whether the filter capacitor is leaking and whether the capacitance is reduced. 5. Check whether the insulation resistance is within the normal range. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #VFD #INVERTER #frequencyinverter #frequencyconverter #shuyitop #converter ...
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ZJSHUYI Usually the soft start system is composed of softstart device. w...

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Usually the soft start system is composed of softstart device, peripheral circuit and motor load. Therefore, the objects protected by the soft start system are also the soft start device, peripheral circuit and motor load. The purpose of protecting the soft start system is to ensure the safe and reliable operation of thyristor components, #softstarter equipment and circuits, and not damage or cause safety accidents under various abnormal working conditions. The premise of #softstarter protection is that the design of the soft starter itself should be correct. The thyristor components are correct and used correctly, the drive circuit and the control circuit are reasonably designed and matched with each other, so that the device can work in a good state. These measures are the basis for the safe and reliable operation of the soft starter. Only under this premise, can the devices, circuits, and equipment fail less and not fail from the inside, and the optimized system design should aim ...
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ZJSHUYI Classic case of inverter maintenance failure.www.shuyitop.com; ...

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Foreword: Inverter repairers must keep in mind that the inverter module and the drive circuit are strongly related to failures. When the inverter module bursts and damages, the drive circuit is bound to be damaged by impact. The damage of the inverter module may also be caused by the failure of the drive circuit. Therefore, whether it is a failure of the drive circuit or the inverter output circuit, it must be The inverter output circuit and the drive circuit are thoroughly inspected together. The power-on test of the main circuit must be carried out under the premise that the drive circuit is normal and can output six excitation pulses normally. Inverter power failure A 132KW inverter has a black screen fault. Part of the wire drawing machine stopped in the wire drawing workshop, and restarted production after half a month. As a result, the inverter went black after being powered on. It was judged that the switching power supply was faulty on the spot. The inverter was removed, and th...
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