There are many special faults, which come and go, looming, making it impossible to judge and deal with. At this time, you can clean the circuit board with water or alcohol, brush off the dust and rust on the circuit board with a soft brush, pay special attention to the dense solder joints, and the circuit near the 0 volt copper layer should also be cleaned and cleaned, and then dried with hot air. Unexpected effects are often achieved. To ** helps in the use of observational methods.
Example 1, the problem of a frequency converter is not displayed, through the start of detection, the rectifier part and the inverter part are intact, so the power on inspection. The DC bus voltage is normal, but the starting voltage of the switching power supply control chip 3844 is only 2V. The on-line detection of the resistance of the voltage divider resistor is much smaller, and the off-line detection is normal. After the scrubbing method is selected, the problem is solved. It turns out that the positive pin pad of a capacitor is very close to the 0V layer, and the residual flux makes it semi-conductive.
Example 2: When the inverter is sent, there are several different alarm records. During the power-on test, various false alarms appeared in the same way. After carefully cleaning the solder joints of the flat cable socket connecting the control board and the driver board, the problem is solved.
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What is the energy feedback of the inverter - Senlan inverter
The essence of energy feedback is active inverter, and the realization method of energy feedback of general inverter is to feed renewable energy to the grid with an anti-parallel three-phase inverter at the uncontrolled rectification of the pre-stage of the general inverter. The main circuit of the energy feedback equipment is mainly composed of thyristors, IGBTs and IPM modules.
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The difference between inverter and inverter power supply - Senland
What is a frequency converter?
Variable Frequency Drive (VFD) uses inverter technology and microelectronics to change the operating power frequency of the motor to control the power control unit of the communication motor.
The inverter is mainly composed of rectifier (from communication to DC), inverter, inverter (from DC to communication) ...
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Sunland proposed a multi-machine parallel high-voltage shore power supply system solution
Air pollution in port cities mainly comes from cargo loading and unloading operations and emissions from ships calling at ports; Shore power connection refers to the closure of the auxiliary engine during the port of the vessel, and the shore power is supplied by the port.
At 9:08 on December 25, 2018, the world's first ...
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Hope Sunland inverter application introduction
1. Motor control
The inverter is mainly used in the field of motor control, which can complete the speed control, torque control, and azimuth control of the motor. The inverter can adjust the speed and load of the motor according to the process requirements, which can improve the output power and quality.
2. Air conditioning refrigeration
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At the physical level, the stable operation of the inverter is guaranteed-Senlan inverter
For the most popular electrical control equipment inverter (Variable-frequency Drive, VFD), as a precision electronic industrial control equipment, in order to run smoothly for a long time, we, as professional and technical personnel, need to be on the VFD device or before the operation.
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Advantages of Sunland HOPE530 series inverter
Sunland HOPE530 series inverter is a high-performance, high-reliability intelligent controller, widely used in a variety of industrial occasions. It is easy to operate, diversified equipment and high quality, and has become one of the intelligent power control equipment trusted by users.
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Quickly determine whether the inverter used is suitable - Sunland inverter
First of all, we need to understand a truth, that is, many times the good and bad of things are relative. The variable frequency drive (VFD) is used as a power source to drive the operation of the motor, and its fundamental role is to regulate the speed. If the wiring is normal, the parameters are reasonable, and the load is not ...
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Inverter load type - Sunland inverter
(1). Constant torque load
Different speeds, load resistance and torque base are stable. The output power is directly proportional to the rotational speed. Such as belt conveyors.
(2). Constant power load
Different speeds, stable load power base ...
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Inverter maintenance method - hope sunland
1. Look
After taking over a faulty inverter, remove the inverter shell and clean it up, and carefully investigate the appearance, shape, and integrity of the relevant components on the circuit board with both eyes according to the type of inverter fault. This method is about charging resistors, filter electrolytic capacitors, IG ...
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Inverter with no-load operation and commissioning - Senlan
(1) Set the power of the motor, the number of pole pairs, and check the operating current of the inverter.
(2) Set the maximum output frequency and base frequency of the inverter and set the torque characteristics of the motor. Pressure/Frequency (V/F) Operators ...
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Calculation method of braking resistance and power of inverter - Sunland inverter
(1) Brake usage rate ED%
Brake usage rate ED%, that is, the brake usage rate in the clarification book ED%. The brake utilization rate ED% is said to be the deceleration time T1 divided by the deceleration cycle T2, and the brake utilization rate is mainly to allow the braking unit and the brake resistance to have sufficient time to dissipate ...
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Advantages of choosing a frequency converter
Advantage 1: Energy saving
The motor adopts frequency converter speed regulation, and its power can be improved by 5%-10%.
The inverter accounts for 20%-30% of the total capacity of the communication motor in the drag of load equipment such as fans, pumps, extruders, mixers, etc., which has a significant energy-saving effect, because the consumption of the fan and water pump is significant.
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The eight forbidden areas of inverter control loop wiring - Senlan
1. The wires of the inverter control circuit should be strictly distinguished from the main circuit cable (power line) and placed separately. This will help prevent the inverter's control circuit from being disturbed by harmonics in the inverter's main circuit.
2. To separate the connection of the inverter from the terminals or contacts of other control circuits, ...
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The harm of low temperature to the inverter - Senlan
Most VFDs are suitable for -10°C-50°C, and if the temperature is too low, the VFD will be affected.
Precautions for low-temperature operation of VFD:
1. VFD should be operated in an environment above minus 10°C as much as possible, preferably indoors.
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Motor starting mode - Senlan inverter
The inverter is a motor control (speed regulation) device that uses the on-off effect of power semiconductor devices to convert the power frequency power supply to another frequency.
Composition 1:
1. Rectifier unit: convert the communication electricity with fixed operating frequency into DC ...
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Heat dissipation method of small-capacity inverter - Senlan
Natural heat dissipation methods are generally used for heat dissipation of small-capacity inverters, because their operating environment should be well ventilated and free of dust and floating objects. The dragging objects of this type of inverter are mostly household air conditioners, CNC machine tools, etc., and the power is small.
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Senlan inverter motor failure analysis
1. The motor slows down too slowly
1) If the deceleration time is set too long, reduce the deceleration time
2) Install a braking resistor
3) Add DC braking
2. The motor is overheated
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Excessive capacity of the inverter causes harm to electrical equipment - Senlan inverter
(1) The harmonic current generated will directly cause the additional heating of the motor, so that the stator of the motor surpasses the additional temperature rise of the motor itself, so that the additional output capacity of the motor will be greatly reduced.
(2) The current output of the inverter ...
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Sunland inverter control panel button function
1. The "FUNC/DATA" key is a programming key, press this button once to convert the operation mode, and press it again to read and write the function code;
2. The "SET/>>" button is the display switch and shift key, press this key to switch the display content, and press it again to ...
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The reason for the explosion of the inverter module - Senlan inverter
1. Condensation The temperature difference in the workshop is large, and the inside of the inverter presents condensation.
2. Impact load. The load fluctuates greatly, and the output current of the inverter suddenly increases, resulting in module damage.
3. The inverter is overloaded in the start, ...
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