ZJSHUYI 3-phase vfd/frequency inverter/ac drive.www.shuyitop.com; #inver...

The frequency converter is a "similar three-phase alternating current" that uses the switching and conduction of the IGBT to convert the direct current into a PWM wave with adjustable amplitude. The realization principle is to control the switching sequence of the IGBT through the three-way PWM wave output by the inverter CPU. There is a 120-degree phase angle between the three groups of PWM waves. Now the #inverter basically adopts the AC-DC-AC mode, that is, the input AC is rectified to DC, and the #inverter is converted to AC. After rectification, the output phase sequence has nothing to do with the input phase sequence, and the output phase sequence can be conveniently controlled in the #inverter link. Only changing the input phase sequence of the inverter cannot change the direction of the motor. Changing the output phase sequence of the inverter can change the direction of the motor. The steering can be adjusted inside the #inverter, and the parameters can be changed. Some #inverters can directly adjust a parameter to realize commutation. The synchronous machine needs to change the larger line and modify the angle. SIWE can correct the multi-function terminal of the forward and reverse, and can also directly exchange the input line of the forward and reverse. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769  #VFD  #INVERTER #frequencyinverter   #frequencyconverter  #converter  #inverters   #vfds  #vfdmarket #3-phasevfd #frequencyinverter #acdrive #highfrequency3phaseinverter #acfrequencyconverter #threephasevfd, #acvariablefrequencydrive #triplephasebestfrequencyinverter

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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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