Zhejiang SHUYI Electric Co., LTD

WE ARE THE MANUFACTURE; AUTOMATION CONTROL SOLUTION PROVIDER; FOCUS ON SOFT STARTER; FREQUENCY CONVERTER; CONTROL PANEL WITH 30 YEARS. Zhejiang SHUYI Electric Co., LTD, an original factory of soft starter; frequency inverter; related components from china. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology   #VFD   #INVERTER #frequencyinverter     #frequencyconverter   #converter   #inverters     #vfds   #softstartermarket #softstarterprice #vfdmarket

It is believed that whether the motor can start successfully is related to the performance of the soft starter 1. The starting torque of the motor plays a decisive role in the load of the starting motor, and the torque of the motor is related to many factors. 2. As a voltage regulator, the motor soft starter can only change the control quantity of the motor stator voltage, and the motor torque is proportional to the square of the stator voltage. Changing the stator voltage also changes the motor torque. The principle is fixed, each brand of soft starter is designed according to this principle, and has nothing to do with its product performance or quality. 3. On the issue of starting torque, as long as the soft starter is not faulty, if the motor cannot start the load, it has nothing to do with its product performance or quality. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology #softstartermarket ...

Check before installation 1. Check whether the soft starter is damaged during transportation. 2. Check whether the nameplate of the soft starter meets the design requirements of electrical equipment. 3. Check whether the soft starter and related quality certification technical documents in the packing box are complete. installation requirements 1. The installation and wiring of the soft starter should follow the corresponding installation standards and safety regulations. 2. It is strictly forbidden to wire the soft starter when it is powered on. 3. It is strictly forbidden to use a megohmmeter to measure the insulation resistance of the soft starter. 4. When the soft starter is working normally, it will automatically output bypass. 5. The soft starter must be connected to the load during debugging, which can be smaller than the actual load. 6. Active input is prohibited from the remote terminal of the soft starter. 7. When wiring the soft starter, the three-phase input power must be w...

The advantages of our frequency converters compared with ordinary frequency converters on the market are: 4. Instantaneous power failure function When the power grid is cut off and the power is turned on again, the energy generated by the motor itself is used to maintain normal operation. After a sudden power failure, there are two ways to deal with it, which is especially suitable for occasions where sudden shutdown is not allowed. 5. Strengthen the three-proof treatment The use of multiple high-quality conformal paint spraying enhances the environmental adaptability of product applications. The PCBA of the whole series of products is treated with imported conformal paint, which has a longer life and reliability. 6. Master-slave control When two motors or multiple motors actuate the same load, and the load distribution of each motor is required to be even, master-slave control can be used. Master Speed ​- Slave Speed ​flex connection. Master speed-slave torque rigid connection www.shu...

1) The higher the operating frequency, the larger the duty cycle of the voltage wave and the smaller the current high-order harmonic component, that is, the higher the switching frequency; 2) The smoothness of the current waveform is better; 3) The higher the switching frequency, the less current the inverter allows to output; 4) The higher the switching frequency, the smaller the capacitive reactance of the wiring capacitor (because Xc=1/2πfC), and the greater the leakage current caused by the high frequency pulse. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #inverter #forfrequencydrive #ACvfd #frequencyinverter #variablefrequencydrive #threephaseacinverter #variablefrequencyinverter #3phaseinverter #achotsalefrequencyinverter #highvoltageacinverter

1. In order to prevent or weaken the interference signal, when the inverter receives the feedback signal, it should be filtered, and the filtering time (sampling time) can be determined according to the site conditions. 2. The start and stop time of the constant torque load can be run at full speed first, and then cut off the power supply to see the total time of free braking, and then set it according to 1/3 of this time. 3. Prefabricated slip compensation (the speed will not change when the load changes) and changing the carrier frequency can solve the problem of easy stall when the load changes. 4. For the selection of braking resistor, the braking current is half of the rated current. 5. The motor used for the constant power load should be much larger than the load. 6. The rotation speed is not allowed to exceed the rated rotation speed under quadratic law load. When running above the rated frequency, the effective torque will decrease. The power P is proportional to the 3rd power ...

The advantages of our frequency converters compared with ordinary frequency converters on the market are: 1. Low speed and high torque output The original advanced current vector control technology and the self-detection function of motor parameters can output high torque characteristics even at very low speeds. 2. Torque quick response Torque response open-loop vector: 20ms, torque response closed-loop vector: 5ms. It can realize stable load operation at ultra-low speed of 0.01Hz. Low torque ripple for smooth operation. 3. Fast rev tracking Without relying on any hardware facilities, it can accurately judge the direction and speed of the motor. A variety of tracking methods to meet the application of different occasions. 4. Instantaneous power failure function When the power grid is cut off and the power is turned on again, the energy generated by the motor itself is used to maintain normal operation. After a sudden power failure, there are two ways to deal with it, which is especiall...

1. Inverter installation environment First, confirm the operating ambient temperature range of the inverter: -10℃～50℃. When the ambient temperature is higher than 50°C, a well-ventilated place should be selected, and the use should be derated by 10% for every 5°C increase. 2. Installation site ◆ Places without corrosion, flammable and explosive gases and liquids; ◆ The humidity of the installation site is lower than 90%, and there is no condensation; ◆ Installed in a place where the vibration is less than 5.9m/(0.6g); ◆ Do not install in a place with much dust and metal powder; www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #inverter #forfrequencydrive #ACvfd #frequencyinverter #variablefrequencydrive #variablefrequency #motoracinverter #chinashuyi #ZJSHUYI

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...

Soft starter is a kind of motor control equipment that integrates #softstart , soft stop and multi-function protection. Not only can the motor be started smoothly and without impact during the entire starting process, but also various parameters during the starting process can be adjusted according to the characteristics of the motor load, such as current limit value, starting time, etc. If the user wants to choose a #softstarter , it must be matched with a cabinet to form a #softstarter cabinet, in order to realize the value of the soft starter. So, when configuring the soft start cabinet, how to choose the online type and the bypass type? Before selecting the type, it is necessary to clarify the difference between online and bypass soft-start cabinets. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology #solidstatesoftstarter #latestpowerstarter #multifunctionalmotorsoftstarter #softstarterby...

1. In order to prevent or weaken the interference signal, when the inverter receives the feedback signal, it should be filtered, and the filtering time (sampling time) can be determined according to the site conditions. 2. The start and stop time of the constant torque load can be run at full speed first, and then cut off the power supply to see the total time of free braking, and then set it according to 1/3 of this time. 3. Prefabricated slip compensation (the speed will not change when the load changes) and changing the carrier frequency can solve the problem of easy stall when the load changes. 4. For the selection of braking resistor, the braking current is half of the rated current. 5. The motor used for the constant power load should be much larger than the load. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #inverter #forfrequencydrive #ACvfd #frequencyinverter #variablefrequencydrive #threephaseacinverter #variablefrequencyinverter #3phaseinver...

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. Overheating 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, various other interlocking protections can also be realized in the ...

1. When the IGBT is connected through, the dead time becomes narrower (the temperature increases, the inverter tube is aging), and the inverter tube enters the amplifying area (the drive power voltage drops, and the inverter tube ages). 2. The output current of the inverter determines the output torque of the inverter. If it is a constant torque load, the current has nothing to do with the frequency drop. The DC part of the inverter will decrease as the frequency decreases, and the input current will decrease as the frequency decreases. 3. The inverter plus the output reactor can effectively suppress the change of DU/DT, because the inverter output is all PWM wave, and there is also distributed capacitance at a long distance, so there may be a large leakage current. 4. Adding capacitors can't change the power factor of the motor. It just means that the capacitor can provide part of the reactive current to the motor without the need for the motor to obtain it from the circuit. www.s...

The advantages of #softstart : reduce the starting current of the motor, reduce the power distribution capacity, and avoid the investment in capacity expansion; reduce the starting stress and prolong the service life of the motor and related equipment; stable starting and soft stopping avoid the surge problem of traditional starting equipment , water hammer effect; a variety of starting modes and a wide range of current, voltage and other settings, can adapt to a variety of load conditions; can effectively reduce the starting current and distribution capacity, avoid capacity expansion investment; it can be stable without steps Start/stop the motor to avoid problems such as mechanical and electrical shocks caused by the use of direct starting, star/delta starting, auto-decompression starting, etc., and traditional starting methods to start the motor. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology ...

The dual power switch is a switch that automatically switches to another power source due to a power failure. General dual power switch is widely used in high-rise buildings, residential areas, hospitals, airports, docks, fire protection, metallurgy, chemical industry, textiles and other important places where power failure is not allowed Beautiful appearance, reliable quality, long life and simple operation. It consists of two three-pole or four-pole molded case circuit breakers and their accessories (auxiliary and alarm contacts), mechanical interlocking transmission mechanism, and intelligent controller. It is divided into two structures: integral type and split type dual power supply new products. The integral type is that the controller and the actuator are installed on the same base; the split type is that the controller is installed on the panel of the cabinet, and the actuator is installed on the base and installed in the cabinet by the user. cable connection. www.shuyitop.com;...

installation requirements 1. The installation and wiring of the soft starter should follow the corresponding installation standards and safety regulations. 2. It is strictly forbidden to wire the soft starter when it is powered on. 3. It is strictly forbidden to use a megohmmeter to measure the insulation resistance of the soft starter. 4. When the soft starter is working normally, it will automatically output bypass. 5. The soft starter must be connected to the load during debugging, which can be smaller than the actual load. 6. Active input is prohibited from the remote terminal of the soft starter. 7. When wiring the soft starter, the three-phase input power must be wired according to the specified phase sequence. 8. The number of soft starter starts is recommended not to exceed 20 times per hour. 9. The soft starter should be installed vertically, and should not be installed upside down, obliquely or horizontally, and the base of the installation should be firm and flat. www.shuyit...

There are two main differences between vector inverters and ordinary #inverters . The first is high control accuracy, and the second is low-speed output torque. It can output 150%-200% of the rated torque. Should be vector frequency conversion is to decompose the motor current into D-axis current and Q-axis current, where the D-axis current is the excitation current, and the Q-axis current is the torque current. By controlling D and Q separately, the motor can get a larger starting torque. Generally used in the occasion of heavy load start. For example, high-power long belts, and hoists, etc. At this time, the ordinary #inverter is selected because the load is too heavy at startup and the output torque is not enough, the motor will not start, and faults such as motor stall or #inverter overcurrent will be reported. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #frequencyinverter     #frequencyconverter   #converter   #inverters   ...

The soft starter is only used for starting, continuous use is not allowed, so a bypass contactor should be used after starting. The bypass soft starter must be used together with the contactor to work normally. After the soft starter starts, the main current is switched to the bypass contactor, and the current during normal operation does not go inside the soft starter, but this does not mean that this is the case. When the soft starter is useless. There is a high-precision transformer inside the soft starter, the main current will pass through it, and the soft start detects the current and voltage during operation through the transformer. The contactor will command the coil of the bypass contactor to de-energize, and the contactor will disconnect the main current, thus playing a variety of protection functions. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology #threephaseforacmotor #builtinbypasss...

In principle, the selection of the #softstarter should be larger than the capacity of the motor being driven. The rated capacity of the soft starter usually has two kinds of nominal: one is nominal according to the power of the corresponding motor; the other is nominal according to the maximum allowable current of the soft starter. The following two points should be noted: 1) Based on the nominal rated capacity of the motor, the rated current of products with different voltage levels is different. 2) It is nominally based on the maximum allowable working current of the soft starter, and the rated capacity of products of different voltage levels is different. In addition, comprehensive consideration should be given, such as the load capacity of the soft starter, working system, environmental conditions, cooling methods, etc. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology #solidstatesoftstart...

#Softstarters are widely used in water plants and pressurized pump stations to achieve #softstart and soft stop of high-power pump motors, focusing on eliminating and reducing the harm of water hammer. When the liquid is suddenly accelerated or decelerated by external force in the pipeline system, or the flow direction is changed, water hammer will be caused. Water hammer is very harmful, ranging from vibration and noise to the pipeline system. flooded. #Softstart has soft stop function, perfect pump stop function, solve "water hammer effect" and mechanical impact, and increase the service life of the motor. Close the pump outlet valve, open the pump inlet valve, and ensure that the pump is "self-priming" (the liquid level is higher than the inlet of the pump under the condition of the pipeline, the starting procedure of the pump is: start the motor, and when the motor runs normally, slowly open it The outlet valve makes the current gradually increase. However, whe...

Soft start technology is an emerging technology for controlling and starting motors. Now it has been widely concerned by modern people, and has been actively applied in the production activities of enterprises. This technology can start the motor smoothly, reduce the voltage well, and can also compensate and convert the frequency of the motor, so as to effectively reduce the adverse impact of the motor start on the power grid and related equipment, thereby effectively protecting various related equipment. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology #threephaseforacmotor #builtinbypassseriesratedacsoftstarter #builtinbypasssoftstarter #singlephasemotorsoftstarter

In the 1980s, with the development of semiconductor technology, especially microprocessors and thyristors, it was possible to control the conduction state of thyristors. In this way, the drop closing of the upper and lower bridge switching elements is controlled by the microprocessor, and the DC electrical changes can be converted into AC current, which is what we often call frequency conversion technology; at the same time, we can adjust the power components . , the opening and closing action cycle can be adjusted to the output frequency of the inverter. Finally, combined with rectification technology, we can change the standard frequency of the grid and the frequency of the power supply required to change the motor frequency and achieve the speed of the motor speed. Tuning controls; through long tech development and scientists, frequency converters are upgraded and evolved in secondary applications, slowly moving to the way we see them today. www.shuyitop.com; Tel/Fax: 0086-577-6284...

Soft stop can solve the water hammer phenomenon and mechanical impact of water pump caused by sudden stop. In many cases, electrical surges are connected directly to the power system due to their starting characteristics. If it is started directly online, it will generate inrush current up to 6 times the rated current of the motor. This current will overload the power supply system and the switchgear connected in series. If it is started directly, it will also generate a high peak torque. This impact will not only impact the drive motor, but also damage the mechanical devices used. During the starting process of the motor, the #softstarter increases the terminal voltage of the motor according to the preset starting curve to accelerate the motor smoothly, thereby reducing the electrical and mechanical impact on the power grid, the motor itself, and connected equipment when the motor starts. When the motor reaches normal speed, the bypass contactor is turned on. After the motor is start...

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. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #inverter #forfrequencydrive #ACvfd #frequencyinverter #ACdrive #motorinverter #singlephasemotorvfddrives #variablefrequencydriver #frequencyconverter