1. The power value of the inverter is the most suitable for the power value of the motor, so as to facilitate the operation of the inverter at a high power value.
2. When the power classification of the inverter is not the same as the power classification of the motor, the power of the inverter should be as close as possible to the power of the motor, but it should be slightly greater than the power of the motor.
3. When the motor is frequently started and braked or is in heavy load starting and frequent operation, a larger inverter can be selected to use the inverter for long-term and safe operation.
4. After testing, the practical power of the motor is indeed surplus, and the inverter whose power is less than the power of the motor can be considered, but it is necessary to pay attention to whether the instantaneous peak current will form an overcurrent protection action.
5. When the power of the inverter and the motor are not the same, it is necessary to adjust the settings of the energy-saving program accordingly to achieve a higher energy-saving effect.
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Variable frequency regenerative braking method - LS generates electricity
1. Energy consumption type
This method is to connect a braking resistor in parallel in the DC circuit of the inverter, and control the on/off of a power tube by detecting the DC bus voltage. When the DC bus voltage rises to about 700V, the power tube is turned on, and the regenerative energy is passed into the resistor.
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The vector control mode of low-voltage general-purpose inverter - LS power generation
The method of vector control frequency conversion speed regulation is to change the stator current Ia, Ib, Ic of the asynchronous motor in the three-phase coordinate system, after the three-phase - two-phase change, equivalent to the communication current Ia1Ib1 under the two-phase static coordinate system, and then after the directional rotation according to the rotor magnetic field, it is equivalent to synchronous rotation sitting.
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How LS produces power PLC operation
Although many relays, timers and counters are often used in the ladder diagram programs used by LS PLC, LS PLC does not have these hardware physically, but uses memory and program programming methods to make logic control modifications, and connects external machines through output components.
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LS Electric helps Cisco Smart City build an industry benchmark
In March 2019, LS Group signed a strategic cooperation agreement with Country Garden to build Cisco Smart City into an innovative model for smart cities. LS Electric will provide power distribution system solutions for Cisco (Guangzhou) Smart City, providing frame circuit breakers, molded case circuit breakers, vacuum circuit breakers, miniature circuit breakers, and micro circuit breakers.
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LS Electric reached a strategic cooperation with Nandu Power Supply and Changzhou Kunlan
Due to the "new infrastructure" policy, the Chinese government has vigorously promoted the new energy and ESS markets, and according to CNESA, the cumulative electrochemical energy storage scale in China will reach 19.3GW in 2023, which is expected to exceed 20% of the global market.
June 3 ...
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The main functions and functions of LS power production PLC
1. For sequential control: sequential control is based on the current and pre-historical conditions of the input switch, and produces the required switching output, so that the system can work in a certain order. This is the basic manipulation of the system. It is also a common manipulation in discrete production processes.
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LS Group witnesses the reopening of the "Viet Nam Professional Football League".
The Viet Nam Professional Football League, sponsored by LS Group, began operations in June and is hosted by Viet Nam Professional Football Joint Stock Company. With the comeback of football events such as the Korea K League and the Bundesliga, more and more football events are also brewing to restart.
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Precautions for the selection of peripheral equipment for LS power inverter
The peripheral equipment of the inverter mainly includes cables, contactors, air switches, reactors, filters, braking resistors, etc. Whether the selection of the peripheral equipment of the inverter is correct and suitable also directly affects the normal operation of the inverter and the service life of the inverter.
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The difference between voltage inverter and current inverter - LS produces electricity
For example, the operating principle of voltage inverter is mainly to regulate the voltage source, and the voltage source regulates the current to achieve the role of conditioning, while the current inverter is to directly regulate the current to achieve the role of conditioning.
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Introduction of LS power inverter governor
Frequency conversion governor is the power frequency power supply (50Hz or 60Hz) into various frequencies of communication power supply, in order to complete the variable speed operation of the motor equipment, during which the control circuit completes the control of the main circuit, the rectifier circuit converts the communication power into direct current, and the output input of the DC center circuit to the rectifier circuit ...
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Inverter installation environment requirements - LS power generation
Inverter device environmental requirements 1: operating temperature;
The inverter is a high-power electronic component, which is easily affected by the working temperature, and the product is generally required to be 0-55 °C, but in order to ensure that the work is [safe] [complete] [can be] [reliable], the use should be considered to leave room for control, and the control is at 40 ...
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Introduction to LS Master-K series PLC programming
LS is an electrical equipment company affiliated to LG, kglwin3.62 programming software Chinese version is a professional plc programming software designed to help daily more efficient planning and development software, the software supports the programming and debugging of LG Master-K series and LG MASTER-K series, and provides ...
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Common practical knowledge in the inverter industry - power inverter
The inverter is the power frequency power supply (50Hz or 60Hz) converted into various frequencies of AC power supply to achieve the variable speed operation of the motor equipment, by changing the motor power frequency to achieve speed adjustment, is an ideal high-efficiency, high-speed regulation means. Frequency converters are used in industrial production and residential ...
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The role of the inverter - LS generates electricity
1. The inverter can adjust the power of the motor and complete the variable speed operation of the motor, so as to achieve the purpose of saving electricity. For example, it is reflected in the centrifugal fan and water pump, when the centrifugal fan and water pump use the frequency converter, the operator can convert the frequency to regulate the speed, and can easily control the flow rate according to the need, so as to save ...
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Analysis of the working principle of the inverter - LS power generation
The rectified DC voltage of the rectifier contains the pulsating voltage of the power supply 6 times the frequency, and the pulsating current generated by the inverter also changes the DC voltage.
The main power is the power replacement part of the power supply for the asynchronous motor voltage regulation and frequency modulation power supply, and the main power of the inverter can be roughly divided into two ...
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The difference between inverter overload and overcurrent - LS generates electricity
Inverter is an important drive material in modern industrial production, as a power equipment, it is working hard all the time, so its fault rate is very high, and the rapid processing of inverter faults, to ensure the continuity of industrial production, is every maintenance electrician and on-site debugging of electricians.
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Inverter air boost test step - LS power generation
1. Download the control program.
2. Put the inverter in open-loop experimental mode and set the appropriate parameters.
3. Connect the incoming cable of the inverter. The cable on the output side of the inverter is not connected.
4. Push the high-voltage cabinet to the experimental position, close the switch, and ...
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Introduction to the working principle of LS electric molded case circuit breaker
Molded case circuit breakers are also known as equipment circuit breakers, all parts are sealed in plastic housings, auxiliary contacts, undervoltage trippers and shunt trippers are modular. Because of the very compact structure, the molded case circuit breaker is basically impossible to maintain. It is mostly manually operated, and the large capacity ...
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The lightning protection port of the inverter - LS generates electricity
According to the applied engineering practice, variable frequency drive (VFD) lightning strikes can be roughly divided into direct lightning, induced lightning and conducted lightning. But no matter what form it takes to reach the device, it can be summarized as a lightning surge from the following four parts, which are called lightning protection ports here, with V ...
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What are the advantages of frequency conversion speed regulation - LS power production
1. Outstanding frequency conversion speed regulation characteristics
Completing the frequency conversion speed regulation of asynchronous motor is the "century wish" that people have been waiting for since the creation of asynchronous motor for 100 years. Through unremitting improvement, enhancement and perfection, the speed regulation function of VFD is not bad, that is, compared with the DC speed regulation system, the part ...
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