1. Cooling fan
As a prerequisite for ensuring the normal operation of the inverter, efficient and fast in-line cooling fans have become an indispensable conversion configuration of the inverter. Because of the wear of the internal bearings of the cooling fan and the influence of the objective factors of the reduction of the grease function in the process of use, the cooling ability of the fan is often greatly reduced, so the cooling fan should be replaced after 2-3 years.
2. Contactor/relay
As the equipment for the charging and control of the internal DC loop of the inverter (mostly seen in domestic inverter brands, foreign models are mostly replaced by thyristor slow charging circuits), and the contacts of contactors (high-power inverters) or relays (low-power inverters) often produce contact ablation, virtual connection and other faults after a period of use. Therefore, in order to achieve the intention of precaution, it is often necessary to replace the contactor or relay in about 2 years.
3. Electrolytic capacitors
The electrolytic capacitors of various capacities (most of which are aluminum electrolytic capacitors) that are responsible for the filtering effect of the DC bus of the inverter need to be replaced after 3-4 years due to the loss of electrolyte, high voltage impact, and the influence of environmental temperature and humidity with the increase of service time.
Fourth, the fuse
In the DC bus circuit of inverters of brands such as Inovance, ABB, and Sanpin, fuses are often used to protect against short circuits. With the extension of the application time, under the influence of high current impact and temperature factors, the function of the melt material will be degraded, resulting in undesirable problems in the inverter. For this reason, the fuse should be replaced every 7 years.
5. PCB circuit board
In fact, the PCB circuit board used inside the inverter, especially the switching power supply, voltage detection and other circuit parts always need to withstand high voltage, so the electrical insulation function of the circuit PCB board will be inversely proportional with the use of time, which is very unfortunate about the use of multi-layer PCB circuit board and a part of the inverter with poor workmanship. For this part, a 7-year replacement cycle should be used for this part of the circuit.
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Senlan inverter selection points
1. Select the inverter according to the load characteristics, such as the load is constant torque load, you can choose Siemens MM440 inverter, ABB ACS800 series inverter, etc.; If the load is a fan or pump load, you can choose Siemens MM430 inverter, ABB ACS510 series inverter, etc.
2、 ...
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Senlan identifies the fault place of the inverter
How to distinguish where the inverter is wrong?
Step 1: Static data checking
1. Check the inverter circuit
The red watch rod is received to the P end, and the black watch rod is separated from U, V, and W, and there should be a resistance value of tens of ohms, and the resistance value base of each phase, the same, the opposite should be infinite.
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Introduction to the main series of Sunland inverter products
SB150
SB150 is a delicate and practical inverter launched by Sunland, with exquisite and delicate appearance, exquisite and perfect circuit, simple and practical function, and clear and reasonable menu distinction. At the center of the SB150 is Sunland's high-performance optimized space vector ...
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Analysis of Sunland inverter fault anomaly
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Sunland inverter breakdown factor
1. Overpressure leads to brake pipe breakdown.
The so-called overvoltage of the inverter refers to the fact that the inverter voltage composed of various reasons exceeds the rated voltage, which is reflected 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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Inverter-related knowledge - Senlan inverter
1. What does open-loop mean in the use of inverters?
The speed detector (PG) is installed on the motor equipment in operation, and the speed response of the actual speed is sent to the control equipment, which is called "closed loop", and the speed detector that does not use PG is called "open loop". Most general-purpose drives are open-loop ...
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Sunland inverter is used in Baotou steel water supply
In recent years, with the development of power electronics skills, the frequency conversion speed regulation skills have been very mature, practice has proved that the use of frequency conversion speed regulation in fans, pumps and loads can save 20%-50% of the electric energy, and the use of frequency conversion speed regulation can bring the following advantages in the future, its biggest advantage is that it has ...
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Industrial control circuit board capacitor damage fault characteristics and maintenance - Senlan
Capacitor damage is the highest problem in electronic devices, especially electrolytic capacitors.
Capacitor damage is manifested in: 1. Capacity becomes smaller, 2. Capacity is completely lost, 3. Leakage, 4. Short circuit.
Electricity...
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Hope Sunland launched the new Hope800 series inverter
Hope Sunland Technology Co., Ltd. is a national key high-tech enterprise dedicated to the research and development of high, medium and low voltage frequency conversion technology and the design, development, production, sales and service of related products.
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Senlan frequency conversion cabinet wiring steps
The wiring of the inverter cabinet refers to the correct connection between the inverter and the motor, power supply and other equipment. The wiring requirements of the cabinet are carried out in accordance with the electrical principles and equipment specifications to ensure the normal operation and safety of the system.
The following is the cabinet ...
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Senlan SV1000 servo drive wearing parts replacement
The wearing parts of the driver mainly include electrolytic capacitors for filtering and cooling fans, and their service life is closely related to the environment and maintenance of the operation.
Depending on the operating moment, the user can determine whether a wear part needs to be replaced.
Cooling ...
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Fault signal processing method of frequency converter
(1) Check whether the motor is hot.
If the temperature rise of the motor is not high, you should first check whether the size of the load, the acceleration and deceleration time, and the running cycle time are reasonable, and correct the V/F characteristics, and check whether the electronic thermal protection function of the inverter is preset reasonably, such as the inverter.
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PLC control belt conveyor soft start method
Belt conveyor is a kind of continuous conveyor, which is one of the main types of fixed or escorted cranes. Belt conveyor is the use of friction to convey the dynamic, with belts, steel belts, steel fiber belts and chemical fiber belts as a kind of compliance with the transmission of materials and traction operations.
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The device inside the inverter that needs to be replaced regularly - Sunland
1. Cooling fan
As a prerequisite to ensure the normal operation of the inverter, efficient and fast in-line cooling fans have become an indispensable conversion configuration of the inverter. Because of the wear of the internal bearings of the cooling fan and the reduction of the grease function in the process of application, the cooling of the fan.
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The inverter has an overvoltage phenomenon - Sunland inverter
Inverters often encounter a variety of problems during commissioning and use, during which overvoltage is the most common. After the overvoltage occurs, in order to avoid damage to the internal circuit, the overvoltage protection function of the inverter will work, so that the inverter will operate intermittently, resulting in the equipment can not be ...
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The reason for VFD trip protection - Senlan
In general, there is a problem with the maintenance trip of the VFD. If you look at the faulty code, you can see what kind of fault is causing it.
1. The selection talent of VFD may be too small; Generally, when selecting VFD, it should be about 20% larger than the rated power of the motor, so that when the motor reaches full load...
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Failure of robot contactor and inverter - Senland
Robot contactors are noisy?
Cause:
It is likely that the joint contact surface of the contactor is uneven, and the surface is sand or rust. The result will constitute a phase loss, which will lead to the burnout of contactors, switch frequency conversion and other components.
Solution:
will control the ...
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Sunland inverter braking resistor connection
Assuming that the inverter has a built-in braking unit and additional braking resistors, it is important to pay attention to the correct wiring of the braking resistors. The braking resistor should be connected between the P terminal and the DB terminal, but not between the P terminal and the N terminal, otherwise the three-phase rectifier bridge will operate at full load when it is not working, resulting in the equipment being unable to ...
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15 Inverter Definitions – Hope Sunland
1. What is frequency conversion resolution? What's the point?
In the case of digitally operated inverters, the output frequency is given in a given order, even if the frequency command is an analog signal. The smallest unit of this gradient is called the variable resolution. Change...
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The difference between soft starter and inverter - Sunland inverter
Soft starter is actually a motor control device with motor soft start, soft stop, light load energy saving and a variety of maintenance functions. First of all, it is a three-opposite parallel thyristor and its electronic control circuit connected in series between the power supply and the controlled motor. By manipulating the conduction of three opposite parallel thyristors ...
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