Why is the energy saving effect of the inverter so poor?

Before installing the frequency conversion, the damper should be closed halfway, indicating that the output power of the fan is roughly about 193-22=175kw when the power consumption is 193 degrees, and nearly half of the power is wasted on the wind choke of the damper, and the air volume provided by the dust removal fan should be able to meet the actual needs. After the inverter can be installed, the electricity consumption can reach 173 degrees when the damper is fully opened, that is, the air volume is nearly 1 times larger than the original, and the output power is about 173-22=151kw. What's more, the difference between the operating frequency and the power frequency of 50 is not very large, so it cannot be concluded that the energy-saving effect of the inverter is poor, you can try to reduce the operating frequency under the condition of ensuring the air volume, and the effect should be very good.

In addition, through my observations in my work, the power saving effect of the inverter in the low-load operation of the equipment is much better than that in the high-load period. Therefore, it is recommended to observe the operation law more, adjust the operation frequency in time, and combine multiple parties to achieve a good energy-saving effect.

The reason for this is that the inverter itself consumes a certain amount of power to operate, and you are operating at close to full range (50 Hz). In the case of satisfying the air volume, try to reduce the frequency, or set a certain pressure value, and let the inverter automatically adjust the motor speed according to the inlet air pressure.

Maybe you don't understand energy saving a little, right?

You take a look, it might help a little.

Hello, the inverter is a kind of power conditioning equipment, which can achieve energy-saving effect by controlling the speed of the motor. The following are several aspects of energy saving achieved by frequency converters:1

Adjust the speed of the motor: The inverter can adjust the speed of the motor according to the actual load demand. The traditional fixed-speed operation mode can lead to excessive or undersized loads due to hail and thus waste energy.

By using frequency converters, the motor speed can be precisely adjusted as needed to adapt to different load conditions and reduce energy consumption. 2.Reduce the number of starts and stops:

The inverter can reduce the energy loss caused by frequent starts and stops by smoothly starting and stopping the motor. Compared with the direct start-stop motor, the use of inverter can better control the voltage and current, thereby reducing the impact of current and the waste of energy consumption. 3.

Adjust motor torque: With the frequency converter, the torque output of the motor can be adjusted so that it only provides the minimum torque required. This avoids additional energy consumption of the motor at partial load.

4.Saving cooling energy consumption: The use of frequency converters can avoid the situation of continuous operation of the motor.

When the load is less than the rated value, the inverter can reduce the motor speed to the minimum required level or stop the motor operation, thus reducing the energy consumption of the cooling system. 5.Power Factor Adjustment:

The inverter head adjusts the power factor of the motor to optimize the energy conversion efficiency. By increasing the power factor, the consumption of reactive power can be reduced and the power factor of the system can be improved.

Summary. The inverter is a device that controls the speed of the motor, and realizes the precise control of the motor by adjusting the frequency and voltage of the power supply to the motor. Frequency converters play several main roles in achieving energy savings:

Speed regulation function: The inverter can accurately adjust the speed of the motor according to the actual load demand. Compared with traditional fixed-speed operation, the inverter can provide just the right speed according to the actual needs, avoiding the additional power consumption and energy waste caused by excessive speed.

Soft start and smooth shutdown: Conventional motors require a large starting current when starting, while the inverter can achieve soft start by gradually increasing the voltage and frequency to avoid excessive starting current. At the same time, a smooth deceleration shutdown can also be achieved during shutdown, reducing impact and energy loss.

The inverter is a device that controls the speed of the motor, and realizes the precise control of the motor by adjusting the frequency and voltage of the power supply to the motor. The inverter has the following main functions in achieving energy saving: speed regulation function

The inverter can precisely adjust the speed of the motor according to the actual load demand. Compared with traditional fixed-speed operation, the inverter can provide just the right speed according to the actual needs, avoiding the additional power consumption and energy waste caused by excessive speed. Soft start and smooth shutdown of jujube dressing:

Traditional motors require a large starting current when starting, while the inverter can achieve soft start by gradually increasing the voltage and frequency stool search to avoid excessive starting current. At the same time, it can also achieve a smooth deceleration shutdown during shutdown, reducing the loss of impact and energy shortage.

Load matching: The inverter can automatically adjust the running split state of the motor according to the variable branch source of the load, so that it can work at the best efficiency point under different load conditions. This reduces the energy consumption and losses of the motor and improves the overall efficiency of the system.

Adjust the power factor: The inverter can improve the power factor of the motor by controlling the phase slip and current supplied by the motor. When running with conventional motors, the power factor is low due to the presence of nonlinear loads.

Through the control of the inverter, the operating power of the motor can be adjusted to close to 1, so as to reduce the reactive power loss and improve the power factor of the system.

To sum up, the inverter can effectively achieve energy saving and high efficiency by accurately controlling the speed of the motor, realizing soft start and smooth shutdown, load matching and adjusting the power factor. This makes the inverter widely used in many fields of Yingshan accompaniment, such as industrial production, wind power generation, water and so on.

The principles for evaluating how much energy savings or power saving rate of the inverter are as follows:

1) There are certain conditions for the inverter to save electricity. Under the condition of not affecting the use, after appropriately changing the working condition parameters, the electric energy consumed by the unreasonable operating parameters can be saved, and the general operation can be transformed into economic operation.

2) To save energy, the frequency must be reduced, the greater the drop value, the more electricity is saved. Without reducing the frequency, the inverter cannot save electricity in principle.

3) It is related to the load rate of the motor. When the load factor is 10% and 90%, the power saving rate is up to 8% 10%, and the low load rate corresponds to the high power saving rate.

4) It is related to the reasonableness of the parameter values of the original operating conditions. For example, it is related to the speed of the adjustable amount of wax such as pressure, flow rate, rotation speed, etc., and the adjustable amount is large, the power saving rate is high, otherwise it is the opposite.

5) It is related to the original adjustment method. Adopt the inlet or outlet valve mode to adjust the operating parameters, it is very uneconomical, if it is changed to frequency conversion speed regulation, it is economical and reasonable. After using the inverter to adjust the speed, it can save 20% 30% more electricity than adjusting the operation method with manual valves.

6) It is related to the original speed regulation method. For example, the original use of differential motor speed regulation Tong rides this, because the speed regulation efficiency is low, especially in the medium and low speed, the efficiency is only less than 50%, very uneconomical, after changing to the speed regulation of the inverter, this part of the electric energy can be saved.

7) It is related to the way the motor works. For example, there are different power savings for continuous, short-term, and intermittent operation.

8) It is related to the working time of the motor. For example, if the machine is turned on for 24 hours a day, the power saving will be greater if it is turned on for 365 days a year, and vice versa.

9) It is related to the power of the motor itself. Under the same power-saving rate, the power-saving value of high-power is large, and the economic benefits are high, even if the power-saving rate is lower than that of small-power motors, but the actual income is large.

10) It is related to the importance of the production process equipment of the unit. First of all, it is necessary to choose the equipment with large power consumption, high product cost, and the current speed regulation method is not economical and reasonable enough to be transformed, and the inverter can have an energy-saving effect after changing to the inverter.

The energy-saving effect of the inverter is closely related to the power saving rate of Yuying Yingxu. The power saving rate refers to the percentage of power savings achieved by a measure or device. A frequency converter is a device that automatically adjusts the speed of the drive motor according to the load demand, saving energy by reducing the frequency at which the motor operates.

Therefore, the inverter can reduce energy consumption by reducing the operating frequency of the motor, so as to achieve the effect of power saving. The higher the power saving rate, the more obvious the energy-saving effect of the inverter.

The inverter is to achieve energy saving through light load step-down, and the drag rotation load does not change much because the speed does not change much, even if the voltage is reduced, it will not be much, so the energy saving is very weak.

But it is different when it is used in the fan environment, when a small air volume is needed, the motor will reduce the speed, we know that the energy consumption of the fan is proportional to the power of the speed, so the speed of the motor will drop sharply, and the energy-saving effect is obvious.

If we use it in oil wells, we will waste a lot of power because of the use of brake resistors on the return trip, and we will waste even more electricity.

This mainly refers to the fan pump load.

The fluid load torque t is proportional to the square of the speed n and the power p=tn 9550 so p is proportional to the cube of the speed n.

When using ordinary motors, it is necessary to consider that the power can still reach the torque when the speed is highest, and the flow rate depends on the size of the valve opening to adjust the flow rate, so that the motor is still working with full load power, and most of the energy is consumed on the useless work done with the valve.

When using a variable frequency motor, it is also considered that the power can still reach the torque when the speed is highest, and the flow rate is adjusted by reducing the speed when the flow requirement is small, without the need for valves. In this way, the motor works in the constant torque section, and the motor power decreases with the decrease of speed. There is no wasted effort to consume.

For example, the full flow rate is 100 cubic meters per minute, and the motor power is 22kw at full loadIn practice, most of them only require 50 cubic meters per minute.

With ordinary motor, the valve is opened 50%, the motor speed remains unchanged, and the electricity consumption is 22 kWh per hour.

With inverter motor, the motor speed is reduced by 50%, and the motor power is proportional to the speed, which is 11kw, that is, the consumption of 11 kWh of electricity per hour. Save 50% of electricity

The appropriate speed or output power can be adjusted to reduce unnecessary waste.