The type of inverter is selected according to the type of production machinery, speed regulation range, static speed accuracy, and starting torque requirements, and it is most appropriate to decide which inverter is the most suitable to use. The so-called suitability is not only easy to use, but also economical, to meet the basic conditions and requirements of technology and production.
How to determine and choose the inverter?
1. The motor and the inverter itself that need to be controlled
The number of poles of the motor. Generally, the number of poles of the motor should not be more than 4, otherwise the capacity of the inverter should be appropriately increased. Torque characteristics, critical torque, acceleration torque. In the case of the same motor power, compared with the high overload torque form, the inverter specification can be derated and selected. Electromagnetic compatibility. In order to reduce the interference of the main power supply, a reactor can be added to the intermediate circuit or the input circuit of the inverter, or a pre-isolation transformer can be installed. Generally, when the distance between the motor and the inverter exceeds 50m, a reactor or filter should be inserted in the middle of them or a shielded protective cable should be selected.
2. The selection of inverter power
The system power is equal to the product of the inverter power and the motor power, as long as both are operating at a higher power, the system power is higher. From the perspective of power, the following points should be paid attention to when selecting the power of the inverter:
The power value of the inverter is the most suitable for the power value of the motor, so that the inverter can operate at a high power value.
When the power classification of the inverter and the power classification of the motor are not compatible, the power of the inverter should be as close to the power of the motor as possible, but it should be slightly greater than the power of the motor.
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.
After testing, the actual power of the motor does have a surplus, and the inverter with a power less than the motor power can be considered, but it is necessary to pay attention to whether the instantaneous peak current will form an overcurrent maintenance action.
When the power of the inverter and the motor are not in phase, it is necessary to adjust the settings of the energy-saving program accordingly to achieve a higher energy-saving effect.
3. Selection of inverter box structure
The box structure of the inverter should be adapted to the environmental conditions, that is, it is necessary to consider factors such as temperature, humidity, dust, pH, and corrosive gases. There are several common types of structures that users can choose from:
The open IPOO type itself has no chassis, and is suitable for installation in the electric control box or on the screen, plate and rack in the electrical room, especially when multiple inverters are used in a centralized manner, it is better to choose this type, but the environmental conditions are higher; The enclosed IP20 type is suitable for general use, and can have a small amount of dust or a small amount of temperature and humidity; Sealed IP45 type is suitable for poor industrial site conditions; The closed IP65 type is suitable for occasions with poor environmental conditions, water, dust and certain corrosive gases.
4. Determination of inverter capacity
Reasonable capacity selection is itself a way to save energy and reduce consumption. Based on available materials and experience, there are three ways to do this:
The actual power of the motor is determined. First, the actual power of the motor is determined, and the capacity of the inverter is selected.
Formula method. When one inverter is used for multiple motors, it should be satisfied: the influence of the starting current of at least one motor should be considered to prevent the inverter from tripping over current.
Motor rated current method inverter. The inverter capacity selection process is actually the best matching process between the inverter and the motor, the most common and safer is to make the capacity of the inverter greater than or equal to the rated power of the motor, but the actual matching should consider how much the actual power of the motor is different from the rated power, generally the equipment can be selected to be large, and the actual need can be small, so it is reasonable to select the inverter according to the actual power of the motor, to prevent the selection of the inverter from being too large, so that the investment increases.
For light load class, the inverter current should generally be selected according to 1.1N (N is the rated current of the motor), or according to the maximum motor power indicated by the manufacturer in the product and the output power rating of the inverter.
5. Main power supply
power supply voltage and shaking. Special attention should be paid to the adaptation of the low voltage maintenance setting value of the inverter, because in actual use, the grid voltage is more likely to be low.
Mains frequency fluctuation and harmonic interference. This interference adds to the heat loss of the inverter system, resulting in increased noise and reduced output.
The power consumption of the inverter and motor itself during operation. When designing the main power supply of the system, the power consumption factors of both should be taken into account.
|
More on that
|
Delixi universal circuit breaker CDW9 series maintenance operation
Delixi intelligent all-round circuit breaker CDW9 series, should be checked regularly every year, first open and close and long-distance equipment, successively use a variety of additives, test operation program column, control unit test using a small test suite; Every two years or when the control unit repair target reaches 100, it should be ...
|
|
Delixi Electric plastic case leakage protector purchase precautions
There are many kinds of manufacturers and brands of electrical equipment and sales of electrical equipment on the market, we must choose the authentic brand of Delixi Electric when buying, and we must buy from regular dealers to avoid buying fakes. Everyone calls the electric tiger because electricity will form poles when it is not used properly.
|
|
Delixi integrated voltage regulator knowledge
The role of a voltage regulator is to convert an unstable DC voltage into a stable DC voltage. However, the integrated voltage regulator has a wider and wider range of applications due to its advantages such as small size, good voltage regulation performance and perfect maintenance function. There are two types of integrated voltage regulators: linear power supply regulators and switching power supply regulators.
|
|
AC contactor controls the forward and reverse rotation of the motor - Delixi
The forward rotation control of the asynchronous motor, the peers of the double contactor and the button are doing more, but is there anyone who will use an AC contactor to achieve the forward rotation control effect of the motor?
Practical application: general bench drill, letter ...
|
|
The reason why the switch socket is hot - Delixi
1. The socket quality is low quality
First of all, we should check whether the socket is a miscellaneous and inferior product, the copper clamping force in the defective socket is not good, resulting in poor contact between the socket and the plug, and the socket and plug will heat up after a long time of electrical use. So be sure not to buy cheap miscellaneous ...
|
|
Why use optocouplers in circuits - Delixi
Requirements for electrical barriers. Between A and B circuits, signal transmission is required, but because of the disparity between the power supply levels of the two circuits, one is hundreds of volts, and the other is only a few volts; Two very different power supply systems, unable to share the power supply;
...
|
|
Analysis of various models of Delixi circuit breaker
CDB1 miniature circuit breaker is a current-limiting high-breaking miniature circuit breaker with overload and short-circuit two-layer maintenance, which is suitable for communicating 50Hz, additional voltage 400V and below, and additional current 63A and below circuits.
|
|
Delixi inverter in the single girder crane electric hoist application case
Single-beam crane throughout the use of electric hoist as a lifting mechanism, with a simple structure, convenient use, widely used in some lifting tonnage small industrial and mining enterprises, domestic hoist crane throughout the use of conical rotor motor, cone motor structure than the general motor messy, ordinary method speed regulation is more difficult ...
|
|
Precautions for leakage vacuum circuit breaker circuit - Delixi
Leakage vacuum circuit breaker connection: When normal operation, regardless of whether the three-phase load is balanced or not, the sum of the three-phase current phasor through the main circuit of the zero-sequence current transformer is equal to zero, so there is no induced electromotive force in the secondary winding, and the leakage maintainer operates in a closed state. In the event of leakage or ...
|
|
The principle and operation method of Delixi inverter operation
The principle and operation method of Delixi inverter:
1. No-load energizing test of inverter
1. Ground the grounding terminal of the inverter.
2. Pass the power input terminal of the inverter through the leakage maintenance switch.
|
|
After 12 years of political participation, Hu Chengzhong said frankly that he is most concerned about the livelihood of private enterprises
Since 2003, when he was first elected to the National People's Congress Committee, Hu Chengzhong, the current chairman of the executive president of Delixi Group, was re-elected as the National People's Congress Committee for two consecutive terms, and in 2018, he was once again elected as a representative of the people from all over the country.
|
|
Reducer troubleshooting method - Delixi
01 "O" ring spell
In addition to the oil seal problem of the reducer itself, the robot manufacturer will also have an impact on the planning and installation of the reducer components, due to the sealing of the reducer, in addition to the oil seal, there are also O-rings.
O-rings are a very common type of product sealing planning.
|
|
The cause of the failure of Delixi inverter
1. Overcurrent (short circuit)
Overcurrent problems are the most common in the side of various faults in the inverter. The problem is mostly due to the following problems: first, as long as the speed converter is reported when starting, it is clear that the overcurrent is very serious, and most of them are load short circuits, mechanical parts stuck, inverters...
|
|
The main functions of Delixi regulated power supply
The primary effect of Delixi voltage regulator is, of course, to stabilize the voltage. When the grid voltage fluctuates instantaneously, the regulated power supply will compensate for the voltage amplitude with a response speed of 10-30ms
1. Stable voltage:
Wangwen Shengyi, Delixi stabilizes ...
|
|
Delixi air switch object, structure, principle
Application of air switches (circuit breakers).
Delixi air switch, also known as circuit breaker. It is a switch that actively closes as soon as the current in the circuit exceeds the additional current. Air switch is a very important electrical appliance in the low-voltage distribution network and electric traction system.
|
|
Delixi CDI-EM60 series inverter
Delixi CDI-EM60 series inverter is a high-performance inverter, with the following characteristics and use:
Characteristic:
1. It has good stability and reliability to ensure the stability and safety of the system operation.
2. High degree, wide range of speed control, ...
|
|
Drawing precautions for wiring diagram of electrical components - Delixi
(1) The drawing of the wiring diagram and the wiring table shall be subject to the request of GB6988.6-1993 in the "Production of Control System Function Table Diagram".
(2) All electrical components and wires should be marked with letter symbols and wiring numbers that differ from those in the schematic diagram of the electrical circuit. Schematic diagram catalog number, final ...
|
|
The advantages of the practical application of the inverter - Delixi
With the continuous progress of industrial automation, inverters have also been widely used, energy conservation and environmental protection as the center of China's industrial economic development, in the direction of the sustainable development of China's industry, but also in the effective promotion of the sustainable development of China's inverter profession, so that I ...
|
|
Delixi product parameter unit VF and V difference
Voltage vf and v difference: The two have different meanings, vf on the battery represents the feedback voltage, while v represents the capacity of the battery, which is the unit of measurement of voltage. Lithium battery is a kind of battery with lithium metal or lithium alloy as the positive/negative electrode data and the use of non-aqueous electrolyte solution.
...
|
|
Delixi Electric CDW3 universal circuit breaker introduction
The CDW3 series frame circuit breakers are rated from 400A to 6300A and 415V/690V AC for extreme environmental conditions of 50 Hz AC and -40°C to 70°C. It is mainly used in the distribution network, distributing electric energy, protecting lines and power supply equipment from ...
|
|
Contact
working hours
