ZJSHUYI The working principle and main features of the soft starter. www...

The soft start is mainly composed of three pairs of anti-parallel thyristor voltage regulating circuits connected in series between the power supply and the controlled motor. Modern soft starters basically use power electronic technology and microcomputer control technology, and use a single-chip microcomputer as the central controller control core to complete the measurement and various control algorithms. Therefore, the soft starter has a strong function and flexibility. The whole starting process is carried out automatically under the control of digital program software. Using the electronic switching characteristics of the three pairs of thyristors, the size of the trigger angle is changed by controlling the trigger pulse sooner or later by the MCU or the single-chip microcomputer. And changing the size of the trigger conduction angle changes the conduction time of the thyristor, and finally changes the size of the three-phase voltage of the stator winding. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology #softstartermarket #softstarterprice #ac powersoftstarterwithbuilt-inbypass #builtinbypasssoftstarter #shuyitop #ZJSHUYI #Chinashuyi

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

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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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