ZJSHUYI What is an AC drive?www.shuyitop.com; #inverter #ACdrive #freque...

In industrial applications, the speed control and torque control are not very demanding for general use of frequency converters, and in the occasions with strict position control requirements, the intelligent use of AC servo drives is used to achieve, and the response speed of the servo is much greater than Frequency conversion, some occasions that require high speed accuracy and response are also controlled by AC servo drives. That is to say, almost all occasions that can be controlled by frequency conversion can be replaced by AC servo drives. AC servo drives and inverters can be said to be a pair of brothers, both of which are drives of AC motors. According to the order of appearance, the inverter should be called the elder brother, and the AC servo drive should be called the younger brother. The frequency converter drives the frequency conversion motor, and also drives the ordinary AC motor. The main function is to adjust the speed of the motor. The AC servo driver drives the AC servo motor, and its main feature is precise and fast positioning and tracking, and precise position control. As one of the supporting technologies of modern industrial automation and motion control, AC servo drives are widely used in machine tools, printing equipment, packaging equipment, textile equipment, rubber and plastics due to their precise high-speed control, wide speed regulation range, high dynamic characteristics and high efficiency. Equipment, electronic semiconductors, wind power/solar energy and other new energy, as well as robots, automated production lines and other fields. However, the AC servo drive has developed frequency conversion technology, and the AC servo drive has learned from and applied the frequency conversion technology. Based on the servo control of the DC motor, it is realized by imitating the control method of the DC motor through the frequency conversion PWM method, that is to say, the AC servo motor is realized. There must be this part of frequency conversion. Like the inverter, the power frequency alternating current is first rectified into direct current, and then converted into alternating current with adjustable frequency through the carrier frequency and PWM adjustment through various transistors (IGBT, IGCT, etc.) that can control the gate. Cosine of pulsating electricity. Are AC Servo Drives Replacing Inverters? , there are two key factors in whether it can be replaced in the end, one is price and the other is power. If one day in the future, the servo brother "condescends" in price, will the inverter brother become more and more "lonely"? If the inverter brother makes technological breakthroughs, will it appear that there will no longer be a brother and a brother, and will become a real A family? The development of technology is as fast as a flash, always beyond our imagination, looking forward to a future with rapid technological progress. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #inverter #forfrequencydrive #ACvfd #frequencyinverter #ACdrive #motorinverter #singlephasemotorvfddrives #variablefrequencydriver #frequencyconverter

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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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