With the improvement of the degree of automation of packaging machinery, packaging machine inverter (hereinafter referred to as VFD) plays an increasingly important role in packaging machinery. Capsule filling machine, high-speed tablet press, bottling production line, aluminum-plastic packaging machine, cartoning machine, each equipment will use VFD, mainly frequency conversion speed regulation, touch screen + PLC + VFD combination is the main use.
1. Select a suitable external fuse to avoid damage to the rectifier equipment caused by internal short circuit. After the model of VFD is determined, if there is no fast fuse to protect the silicon equipment before the internal rectifier circuit is corrected with VFD, a fuse and isolation switch that meet the requirements should be equipped between the VFD agent and the power supply, and the fuse and isolation switch cannot be replaced by an air switch.
2. Select the introduction and outlet cables of the VFD agency. Depending on the power of the VFD, a three- or four-conductor shielded power cable with a suitable conductor cross-section is selected. In particular, the power cables from the VFD protection to the motor must be shielded and kept as short as possible, so that electromagnetic emissions and capacitive leakage currents can be reduced. When the cable length exceeds the allowable output cable length of the VFD, the stray capacitance of the cable will affect the normal operation of the VFD, so it is necessary to equip the output reactor. For control cables, especially I/0 signal cables, shielded construction should also be used. The length of the connecting cable between the VFD and the VFD peripheral components must not exceed 10m.
3. Install a communication reactor or electromagnetic compatibility filter on the input side. According to the requirements of other equipment on the site of the VFD device for the quality of the power grid, if the normal operation of these equipment is affected during the operation of the VFD, the VFD can install a communication reactor or EMC filter on the input side to suppress the electromagnetic interference caused by the on/off of the power equipment. If the neutral point of the grid transformer connected to the VFD agent is not grounded, the EMC filter cannot be selected.
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Water pump inverter pressure adjustment method - Reynolds
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Protection feature of overcurrent trip - Renol
1. Maintenance objectives of overcurrent
In the frequency conversion speed regulation system, there are two devices: the frequency converter and the motor. The degree of tolerance to overcurrent is not the same. The planners of the production machinery decide on the capacity of the motor based on the principle of heat. That is, as long as the electricity ...
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The reason why the inverter burns the power supply inlet end - Reynolds
1. It is necessary to consider the touch and current size of the incoming terminal, if the terminal standard is small, perhaps the conductive function of the terminal is poor, which will directly cause the current carrying capacity of the terminal to be small and heated.
2. The inlet at the end of the inlet line must be pressed well and the like, if it is not pressed, it may cause ...
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Methods and steps of frequency conversion speed regulation - Reynolds
Frequency conversion speed regulation is to change the power supply frequency through the frequency converter, and then adjust the motor speed to improve the operation efficiency of the electric drive system. Depending on the current, VFDs can be divided into AC-DC-AC type and AC-AC type. At present, the most widely used in China is the AC-DC-AC type.
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The abnormal installation of the inverter in the power frequency motor leads to hazards
Installing a variable-frequency drive (VFD) on the power frequency motor can complete the precise control and speed regulation of the motor, and improve the power and accuracy of the progressive motor. However, if it is not properly used and used, the following damages may occur:
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The factor that causes the breakdown of the inverter – Reynolds
1. Overpressure leads to brake pipe breakdown.
The so-called overvoltage of the inverter refers to the fact that the inverter voltage formed due to various reasons exceeds the additional voltage, which is concentrated in the DC voltage of the inverter DC bus.
The overvoltage alarm generally appears at the time of shutdown, and its main ...
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Features of electronic single-phase current transmitter – Reynolds
Single-phase current transmitter is a kind of electric power test substation developed for the power measurement of single-phase communication in motor experiments on the basis of motor experiment and testing technology research, in accordance with IEC and relevant national specifications for motor experiments. The use of advanced filtering technology, reasonable software algorithms, ...
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The basic principle of vector control of frequency converters
The basic principle of vector control is to control the excitation current and torque current of the asynchronous motor according to the principle of magnetic field orientation through the measurement and control of the stator current vector of the asynchronous motor, and then achieve the purpose of controlling the torque of the asynchronous motor. Specifically, the stator of the asynchronous motor ...
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Reynolds inverter frequency
That is, the upper and lower amplitudes of the output frequency of the inverter. Frequency is a maintenance function to avoid misoperation or failure of the external frequency setting signal source, which causes the output frequency to be too high or too low, so as to prevent damage to the equipment. You can set it according to the actual situation in the app. This function can also be used as a speed limit, so that ...
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Wiring method and principle of PLC and inverter shielded wire - Reynolds
In order to avoid the interference of the control signal line between the PLC and the inverter by the space electromagnetic field, the shielding wire can be connected to the outer layer of these control signal lines to improve the anti-interference ability of the system. This kind of wiring must be noted, and only one point can be selected for the grounding point of the shield. Whether it's on the PLC side, or ...
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The cause of the heating of the inverter of the special machine
1. Problems of the inverter and the motor itself;
After the motor has been used for a long time, it cannot be ruled out that the insulation function is not good, or the bearing is stuck, and it may show a large current and heat. The coupling between the motor and the load may also be worn, or the motor is unbalanced in three phases, and the fixtures of the motor are loose.
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Motor soft start mode – Reynolds frequency inverter
Starting performance is a very important performance parameter of motor products. The large starting current of the motor is an unpreventable problem in the process of direct starting. The high current during the engine process has a great impact on both the power grid and the motor itself. Therefore, according to different working conditions and different series of motors, ...
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Reynolds soft starter features:
The Reynolds soft engine is a new type of software launcher that can assist users in quickly launching and closing the computer system. It was developed by Reynolds and its main function is to provide a fast, safe and reliable software launcher that can assist users in quickly launching and closing ...
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Reynolds drive soft troubleshooting
1. Phenomenon
(1) When starting from the beginning, it trips as soon as the speed is raised. This is a very serious phenomenon of overcurrent. The main reasons are: short circuit of load, stuck mechanical parts; The inverter module is damaged; The torque of the motor is too small.
(2) Jump when powered on, this phenomenon generally can't ...
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Reynolds frequency converters RNB1000 series E.ITE fault codes
Reynolds inverter problem code:
E.ITE
Reynolds inverter problem phenomenon/type:
Problems with the current sensing circuit
Possible causes of Reynolds inverter problems:
1. Poor contact of the control board connector
2. The auxiliary power supply is damaged
3. Hall ...
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Reynolds soft starter troubleshooting methods
Common troubleshooting methods for Reynolds soft starters.
During the debugging process of the soft starter, the fault light is on, the motor is unresponsive, and the cause of the fault is analyzed:
When the starting mode adopts the live mode, the operation sequence is wrong (the correct operation sequence must first deliver the main power supply, and then the control ...
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Precautions for the use of frequency converters - Reynolds
In order to ensure the safe, efficient and reliable operation of the inverter, the following keys should be grasped when using the inverter:
1) It is necessary for the grounding terminal of the inverter to be firmly grounded, so as to effectively press the radio frequency disturbance and enhance the reliability of the system: the frequency conversion speed regulation system is best to use independent grounding, grounding resistance...
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Operating instructions for the Reynolds control panel
1. FUN button; Press the FUN button to enter the settings menu F00;
2. Press and hold the up button or down button to scroll to the code that needs to be set;
3. Press the FUN button to confirm at this moment, and adjust the entry parameters to the required value;
4. After the adjustment is completed, press the WR storage button, and then the panel will display the ...
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Introduction to the appearance of Reynolds inverter
Bypass cabinet: The cabinet is equipped with high-voltage inlet and outlet isolation switches QS1 and QS2, as shown in Figure 2. Among them, QS1 is a single-pole single-throw variable frequency incoming knife switch, and QS2 is a single-pole double-throw power frequency and variable frequency outgoing knife switch. The bypass cabinet is a high-voltage environment, please observe the live display and electromagnetic lock status to ensure that the ...
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Application misunderstandings and drawbacks of inverter and countermeasures - Reynolds
Misunderstanding: connect electromagnetic switches and electromagnetic contactors in the output circuit of the inverter
In actual use, some occasions require the use of contactors for frequency converter switching: such as when the frequency conversion is faulty, switch to the power frequency operation, or when the one-to-two method is adopted, a motor is faulty, and the variable frequency is used.
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