It is understood that with the development of society and the advancement of science and technology, frequency converters have been developing very rapidly in recent years due to energy saving, and have been widely used. What is the energy-saving principle of frequency converter?
1, frequency conversion energy-saving
Inverter energy-saving is mainly reflected in the application of fans and pumps. In order to ensure the reliability of production, various production machines have a certain amount of margin when they are designed and equipped with power drives. When the motor cannot be operated under full load, in addition to reaching the power drive requirements, the excess torque increases the active power consumption, resulting in a waste of electrical energy. The conventional speed regulation method for fans, pumps and other equipment is to adjust the amount of air supply and water supply by adjusting the baffle and valve opening of the inlet or outlet. The input power is large, and a large amount of energy is consumed in the process of closure of the baffle and valve. . When using variable frequency speed regulation, if the flow requirements are reduced, the requirements can be met by reducing the pump or fan speed.
According to fluid mechanics, P (power) = Q (flow) × H (pressure). The flow Q is proportional to the primary speed of the speed N, the pressure H is proportional to the square of the speed N, and the power P is proportional to the cube of the speed N. If the efficiency of the pump is constant, when the flow rate needs to be adjusted to decrease, the speed N can decrease proportionally, and at this time, the output power P of the shaft decreases. That is, the relationship between the power consumption of the water pump motor and the rotational speed is approximately established. When the required flow rate Q of the team is reduced, the inverter output frequency can be adjusted so that the motor speed n is reduced proportionally. At this time, the power P of the motor will be greatly reduced according to the relationship of the third power, saving 40% to 50% of the power of the baffle and the valve, thereby achieving the purpose of saving electricity.
2, power factor compensation energy
The reactive power increases the line loss and the heating of the equipment, and more importantly, the reduction of the power factor leads to the reduction of the active power of the power grid. Among the large number of reactive power consumption lines, the equipment is inefficiently used and wastes heavily. After the frequency conversion speed regulating device is used, the frequency conversion The internal filter capacitor acts to reduce reactive losses and increase the active power of the power grid.
3, soft start energy
The hard start of the motor will cause serious impact on the power grid, and it will also impose excessive demands on the capacity of the power grid. When a large current and vibration are generated during start-up, the damage to the baffle and the valve is extremely great, and the service life of the equipment and the pipeline is extremely unfavorable. The use of variable-frequency energy-saving devices, the use of the inverter's soft-start function will start current from zero, the maximum value exceeds the rated current, reducing the impact on the grid and the power supply capacity requirements, extending the life of equipment and valves. Save equipment maintenance costs.
The application of outdoor display screen is made of LED module splicing, and the screen size is customized according to the size of outdoor module required by customers. The screen body of various application occasions required by customers, such as outdoor large screen, vehicle screen, door screen, traffic guidance screen, etc. All display contents are set according to customer requirements.
LED outdoor module classification: single color, only one color module can be displayed, such as single red, light green, single white, single blue, etc.
Two colors, only two color chip lights, can display three colors, such as traffic lights, in addition to red and green, can also display yellow.
Seven colors, customer requirements are not high, as long as the display of seven colors is good, generally used for the door. Full color is also the most conventional and competitive product of visual display. It has a wide range of uses. The following also focuses on the characteristics of outdoor modules of visual display.
1. High brightness. The brightness of outdoor products is more than 6000cd. The color of products is gorgeous and the reduction degree is high. The screen can still display a clear and bright picture.
2. Good waterproof performance: the waterproof performance of the screen is IP65, so no matter what kind of environment, it can meet the use requirements.
3. Diversity of customization: according to customer requirements, customize different shapes to meet personalized needs
4. Module installation: each model of product has its corresponding size, so the size of modular installation can be adjusted at will, and maintenance is simple. The removal and installation of single block will not affect the use of the whole screen.
Structure of outdoor module: outdoor module consists of outdoor high brightness LED lamp beads, waterproof glue, PCB, IC and resistance capacitance electronic components, bottom shell and mask. The above can be customized according to the customer's requirements, matching according to the customer's requirements, the use voltage is generally low voltage 5V or 3.8V, etc.
Precautions: during the installation of the product, pay attention to collision at the corners, module transportation, and collision between LED modules. Connect the power supply voltage. Avoid damage.
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Shenzhen Vision Display Technology Co,.LTD , https://www.ledvdi.com