Zhejiang SHUYI Electric Co., LTD

soft starter is a new type of equipment integrating the new motor control theory, static motor protection technology and modern computer technology. It is an ideal substitute product for the early starting equipment such as star triangle conversion, self-coupling step-down and magnetron step-down used for motor starting.Its performance is unmatched by most soft starter products on the market which do not adopt multiple closed-loop control technology. Web: www.shuyitop.com ; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology #VFD #INVERTER #frequencyinverter #frequencyconverter #converter #inverters #vfds

The #softstarter has the following 4 major protection functions: 1. Overload protection function: The soft starter introduces a current control loop, so it can track and detect the change of motor current at any time. By increasing the setting of overload current and the inverse time limit control mode, the overload protection function is realized. When the motor is overloaded, the thyristor is turned off and an alarm signal is issued. 2. Phase loss protection function: When working, the soft starter can detect the change of the three-phase line current at any time. Once the current is cut off, it can make a phase loss protection response. 3. Overheat protection function: The temperature of the thyristor radiator is detected by the internal thermal relay of the soft starter. Once the temperature of the radiator exceeds the allowable value, the thyristor is automatically turned off and an alarm signal is issued. 4. Other functions: Through the combination of electronic circuits, variou...

Modern #frequencyconverters generally have a PI controller or PID controller inside. For closed-loop control systems such as constant pressure water supply, feedback signals (such as pressure signals) can be connected to the feedback signal terminal of the inverter, and the controller inside the #inverter can be used to achieve closed-loop control to reduce pressure deviation and maintain water pressure. constant. The main purpose of PLC is to control the number of pumps powered by the power frequency power supply based on the outlet pressure of the pipeline, and to provide start and stop commands to the frequency converter through the switch output signal, and to roughly adjust the total water supply of the pump station. In the system shown in the figure below, the pressure transmitter converts the water pressure of the outlet pipe of the pumping station into the voltage or current of the standard range, and these feedback quantities are directly sent to the analog input terminal of...

he entire startup process of the online #softstarter soft start, including the running process after the startup is completed, is all within the soft start. Without going through other external components, this leads to all the heat-generating parts, including the heat generated by up to 3.5-7 times the starting current at startup, and the heat generated during normal operation. This has certain requirements for the heat dissipation of the soft start, the heat dissipation of the entire cabinet, and the temperature of the power distribution room. If it is not maintained well, it will easily affect the life of the equipment. The advantage is that this starting method saves a contactor that switches to the power frequency when starting, and it takes a lot of space to place a high-current contactor in the power distribution cabinet and achieve good fan heat, and direct starting saves a lot of space. space, and even in some occasions, the incoming line contactor can be omitted in order to s...

Most of the frequency converters are frequency converters in the form of PWM modulation. That is to say, the voltage output by the inverter is actually a series of pulses, and the width and interval of the pulses are not equal. Its size depends on the intersection of the modulating wave and the carrier wave, that is, the switching frequency. The higher the switching frequency, the more the number of pulses in a cycle, the better the smoothness of the current waveform, but the greater the interference to other equipment. The lower the carrier frequency or the bad setting, the motor will make unpleasant noise. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #inverter #forfrequencydrive #frequencyinverter #variablefrequencydrive #threephaseacinverter #variablefrequencyinverter #3phaseinverter #achotsalefrequencyinverter #highvoltageacinverter

The entire startup process of the online #softstarter soft start, including the running process after the startup is completed, is all within the soft start. Without going through other external components, this leads to all the heat-generating parts, including the heat generated by up to 3.5-7 times the starting current at startup, and the heat generated during normal operation. This has certain requirements for the heat dissipation of the soft start, the heat dissipation of the entire cabinet, and the temperature of the power distribution room. If it is not maintained well, it will easily affect the life of the equipment. The advantage is that this starting method saves a contactor that switches to the power frequency when starting, and it takes a lot of space to place a high-current contactor in the power distribution cabinet and achieve good fan heat, and direct starting saves a lot of space. space, and even in some occasions, the incoming line contactor can be omitted in order to...

Modern #frequencyconverters generally have a PI controller or PID controller inside. For closed-loop control systems such as constant pressure water supply, feedback signals (such as pressure signals) can be connected to the feedback signal terminal of the inverter, and the controller inside the #inverter can be used to achieve closed-loop control to reduce pressure deviation and maintain water pressure. constant. The main purpose of PLC is to control the number of pumps powered by the power frequency power supply based on the outlet pressure of the pipeline, and to provide start and stop commands to the frequency converter through the switch output signal, and to roughly adjust the total water supply of the pump station. In the system shown in the figure below, the pressure transmitter converts the water pressure of the outlet pipe of the pumping station into the voltage or current of the standard range, and these feedback quantities are directly sent to the analog input terminal of...

The functions contained in the frequency converter. First, the acceleration function can be controlled to smoothly accelerate according to the needs of the user. Secondly, the stopping method of the motor and equipment is controllable, making the whole equipment and system safer and the service life correspondingly increased. Then, the starting current of the motor is controlled to sufficiently reduce the starting current, thereby reducing the maintenance cost of the motor. Finally, wear and tear of mechanical transmission components can be reduced, resulting in lower procurement costs while improving system stability. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #inverter #forfrequencydrive #ACvfd #frequencyinverter #variablefrequencydrive #threephaseacinverter #acdrive #motorinverter #singlephasemotorvfddrives #variablefrequencydriver #frequencyconverter

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 ai...

Soft starter, as the main component of soft start control cabinet, plays a very important role in soft start control cabinet. Soft start control cabinet through soft start with control switch, contactor and so on to control various power equipment. Soft start control cabinet is widely used in the control of different electrical equipment. The so-called soft start is that the voltage gradually increases from zero to the rated voltage, and the current also changes from small to large. During the whole process of starting the motor, there will be no shock torque, but a smooth start-up operation. There are generally the following startup methods: Ramp boost soft start, ramp constant current soft start, step start, pulse impact start, voltage double ramp start, current limit start, etc. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology #bestacfrequencyinverter #generaltypefrequencydrive #variablespe...

The inverter consists of three parts, the "rectifier" that converts the power frequency power into DC power, the "smoothing circuit" that absorbs the voltage pulsation generated by the converter and the #inverter , and the "rectifier" that converts the DC power to AC power. Inverter". The main circuit is the power conversion part that provides the voltage regulation and frequency regulation power supply for the asynchronous motor. The main circuit of the frequency converter can be roughly divided into two categories: the voltage type is the frequency converter that converts the DC of the voltage source into the AC, and the filter of the DC circuit is the capacitor. . The current type is a frequency converter that converts the DC of the current source into an AC, and its DC loop filter is an inductance. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #inverter #forfrequencydrive #ACvfd #frequencyinverter #variablefrequen...

The so-called #softstart means that the voltage we add to him at the beginning of the start is lower than the rated voltage. Common #softstart are: soft starter start, autotransformer step-down start. Autotransformer step-down start-up In the early stage of starting the motor, first add a voltage of 60% to 80% of the rated voltage to it, let it move first, and then switch it to work under the rated voltage after it starts to rotate. It is a simple #softstart process. The soft starter is more advanced than the autotransformer step-down start. The principle is the same. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology #bestacfrequencyinverter #generaltypefrequencydrive #3phasefrequencyinverter #variablespeeddrivefrequencyinverter #frequencyinvertervfddrive #frequencyinverterforsale #minifrequencyconverter #highefficiencyfrequencyinverter

How to choose a soft start There are many types of soft initiators, and the soft initiators selected are not the same according to different site conditions and equipment. So how to carry out the selection of # softstarter? Bypass type: when the motor reaches the rated revolution, the bypass contactor is used to replace the # softstarter which has completed the task, so as to reduce the heat loss of the thyristor and improve its working efficiency. You can also use a soft starter to start more than one motor. Bypass type: the thyristor is in the full conduction state, the motor works in the full voltage mode, ignoring the voltage harmonic component, often used for short-time repetitive work of the motor. Energy saving: when the motor load is light, the soft starter automatically reduces the voltage applied to the motor sta r t e r, reduces the current excitation component of the motor, and improves the motor power factor. There are many types of soft starters, and the # softst...