In order for a VFD to operate reliably for a long time, it is necessary to repair the electronic components in the VFD on a regular basis and replace the primary components of the VFD according to the service life.
1. Cooling fan
The VFD power module is the device that generates the most heat, and it is necessary to discharge the heat in time to continue its operation. There will be no warning and unpredictable fan damage, so the time must be changed, not from small to large. Generally, the life of the fan is 10kH-40KH. Depending on the continuous operation of the VFD, the fan should be replaced every 2-3 years. Direct cooling fans are divided into two lines and three lines. One line of the second-wire fan is positive, and the other line is negative. Don't make a mistake when replacing a three-wire fan. In addition to the positive and negative poles, it should be noted that the communication fan is generally 220V, and the 380V point is 220V and 380V points. When changing the voltage level, it should not be. Regular brand VFDs will have a special repair chapter on the hardware manual, which will indicate the primary original factory service life and replacement cycle. If there is no above content, it means that the VFD you purchased is not a regular brand, and it is recommended to replace it.
2. Electrolytic capacitors
The passive components inside the VFD are mainly composed of inductors, capacitors, resistors, etc. It's called a filter. What it does is to get a specific frequency or eliminate a specific frequency. The capacity of the filter is directly proportional to the operating current, that is, the higher the operating current, the greater the capacitance of the capacitor required. Capacitors typically have a lifespan of 5 years. Capacitors should be reviewed regularly every year. In general, they should be replaced when the capacity is reduced by more than 20%.
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Applicable mode of inverter maintenance - Reynolds inverter
CNC cutting machine
1. Gradual reduction method
The so-called gradual reduction method is to narrow the scope of shortcomings step by step by elaborating the shortcomings and judging the measurement parameters.
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Reynolds drives RNB1000 series fault code resolution
Reynolds inverter fault codes:
E.bC
Reynolds inverter fault phenomenon/type:
Brake unit failure
Reynolds inverter failure may be caused:
1. Brake line failure or brake ...
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Precautions for Wiring Reynolds Inverters
1. The inverter itself has a strong electromagnetic disturbance, which will disturb the work of some equipment, so we can add a cable sleeve to the output cable of the inverter.
2. The control line in the inverter or control cabinet is at least 100mm away from the power cable, etc.
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The reason for the preferred DC mode in the intermediate link of the inverter - Reynolds
The development of the inverter has experienced a slow and gradual process, and the inverter at the beginning of the first century did not choose this kind of AC-DC: communication to DC and then to communication, but direct AC, no central DC link. This kind of inverter is called alternating frequency converter, and now this kind of inverter is in the ultra-high power ...
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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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The working principle of the motor soft starter – Reynolds
Motor soft starter is the primary selection of power electronics skills and microprocessing skills and modern control theory and design and production of advanced level of new engine equipment, motor soft starter mainly has anti-interference function, high reliability, multiple protection functions and other characteristics, according to these characteristics of electric ...
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Reynolds soft starter problem solving
1. The soft starter does not start and the fault-free code appears, perhaps because the control power supply is not connected, the solution is to check the power supply of the control power supply to see if the circuit connection is correct.
2. The motor starts when the motor announces a hum/no start signal, perhaps because of the thyristor/module ...
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The inverter uses a power-saving method – Reynolds
As an electronic electric, the inverter itself also consumes electricity (about 3-5% of the rated power). A 1.5 hp air conditioner consumes 20-30W of electricity, which is equivalent to the length of a lamp. The inverter works under the power frequency and has the function of saving electricity, which is practical. However, the conditions are:
First, high power and ...
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Inverter composition and various functions - Reynolds
Rectifier circuit: rectify 50HZ communication power into direct current.
Frequency conversion circuit: The rectified direct current is inverted into a variable frequency communication current.
Control part: control the frequency of communication electricity output by the inverter circuit.
Maintenance circuit: maintenance and blockage of overcurrent and phase loss ...
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Inverter leakage solution - Reynolds
1. The cause of the leakage problem
Some sites use frequency converters to control the motor, which will present the problem of leakage, and the leakage voltage ranges from tens of volts to 200 volts. In view of this problem, the reasons for this shortcoming are theoretically expounded and stated as follows.
Depend on...
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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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Key points for the selection of Reynolds servo motors
Each type of servo motor has additional torque, maximum torque and servo motor inertia and other parameters in the standard items, each parameter and load torque and load inertia must have a relevant connection, the output torque of the servo motor should meet the requirements of the movement conditions of the load organization, such as the speed of the acceleration ...
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The lightning protection method of Reynolds inverter
The lightning protection measures of the inverter equipment are another important peripheral measure to ensure the safe operation of the inverter, especially in the area where lightning is active or in the lively season, this problem is particularly important.
Today's inverter products are generally equipped with lightning ...
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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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The frequency of the frequency converter is given in a given way
The first way to use the inverter is to change the output frequency to achieve the controllability of the motor speed, so do you know what steps to complete the output frequency controllability? One of the first and foremost key points is how to complete the change of the frequency signal supplied by the inverter equipment.
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Introduction and features of Reynolds soft starters
Reynolds soft starters include soft starters for high, medium and low voltage motors, including JJR1000 series, JJR2000 series, JJR5000 series, and RNB3000 series frequency converters. Reducing the starting power supply avoids voltage drops and voltage dips in the power supply. Smooth start-up avoids product damage. ...
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Precautions for multiple motors in one inverter - Reynolds
Equipment selection
1. Inverter selection. When it comes to sizing, the first thing to consider is the operating conditions – whether one or more motors should be started or stopped at any time during the operation of the inverter.
If the motor does not need to be started at any time during the operation of the inverter, it may only be stopped or ...
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The solution to the low or high output of the differential pressure transmitter – ifm
When the differential pressure flowmeter (V-cone flowmeter) is used in the field, it often encounters such and such problems, but the reason for it is investigated, as long as it is installed correctly, the primary problem is on the secondary surface differential pressure transmitter, and the following is the first to introduce these problems to us ...
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The inverter cannot adjust the frequency solution - Reynolds
1. The acceleration moment is too short.
Theoretically, the longer the acceleration time, the stronger the load lifting capacity. If the acceleration time is set too short, some VFDs will show an overcurrent or overload, overtemperature alarm, while others will not, and will only be stuck in a certain frequency band.
2.The V/F ratio is too large
Some of this ...
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Soft-start starting method – Reynolds
1) Ramp boost soft start. This starting method is simple, does not have current closed-loop control, and only adjusts the conduction angle of the thyristor to make it add a certain function with time. The disadvantage is that because there is no current limit, in the process of motor starting, sometimes a large impulse current is generated.
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