The variable frequency power supply can output pure sine waves, and the output frequency and voltage can be adjusted within a certain range, with stable frequency and stable voltage. More importantly, the starting current of the variable frequency power supply is low and unaffected. It is located in the system and network, and has a significant energy-saving effect. It is an environmentally friendly power supply product with energy-saving and energy-saving effects. In fact, in addition to saving energy, the variable frequency power supply can also increase energy savings when adjusted to a specific load. Next, we will tell you how the variable frequency power supply can achieve energy saving, and under which loads are matched with each other to make energy saving more effective.
Reasons for using variable frequency power supply to save energy
1. Soft start braking function
The variable frequency power supply completes the soft start and braking functions, and can reduce the impact of the starting current. As the voltage gradually increases from zero to the rated voltage, the starting current of the variable frequency power supply changes from uncontrollable overload surge current in an uncontrollable manner during the starting process, and the starting current can be adjusted as needed. There is no impact torque during the entire engine starting process, but a smooth starting process reduces the impact and achieves energy saving.
2. Low slip rate operation
The variable frequency power supply always requires low slip operation to reduce rotor loss. The slip rate is the ratio of the difference between the speed of the stator magnetic field and the speed of the rotor to the speed of the stator magnetic field. The smaller the slip, the faster the speed and the smaller the load, which can save energy.
3. The speed regulation loss is very small
The variable frequency power supply speed regulation system has low loss and high working efficiency. It runs smoothly and has high speed regulation efficiency. At low speed, the characteristic static shutdown rate is very high, and the relative stability is also very good. The starting current is low, there is no impact on the system or power grid, and the power saving effect is good. The purpose of energy saving can be achieved by using the speed regulation of the variable frequency power supply and the technology of controlling the motor speed under light load conditions.
Electronic loads that achieve significant energy saving
1. Centrifugal fan
The torque of this equipment is proportional to the square of the speed, and the power is proportional to the cube of the speed. The variable frequency power supply adjusts the voltage and frequency of the output power supply by turning on and off the internal IGBT, and provides the required power supply voltage according to the actual needs of the motor. This can save energy and speed. Needless to say, the speed can be adjusted to a constant speed using a regulating valve. If the output flow is reduced to 80% of the original flow under normal circumstances, its output can be reduced to 51.2%. From this, it can be seen that the energy-saving effect of this load is very good.
2. Roots blower
When torque and speed are unrelated, energy can be saved by setting variable frequency. However, the effect is far less important than the former. If the speed of the fan motor drops to 80% of the original speed, the power will be 80% of the original speed.
The above explains how variable frequency power supply can achieve energy saving and which load parts can be used in combination to save more energy. The startup mode and operation mode of the inverter determine the excellent energy-saving effect of the variable frequency power supply. We need to choose to buy a reliable quality variable frequency power supply and pay attention to the combination of power supply and load to make the energy saving effect more significant.
Guangzhou IDEALPLUSING is dedicated to the research and development and application of power electronics technology. We specialize in the production of variable frequency power supplies, DC power supplies, adjustable power supplies, DC converters, inverters and other products. We are determined to be a manufacturer that provides solutions for customers. In the packaging of variable frequency power supplies, we use thicker non-log wooden boxes to make the products safer and less prone to damage when exported abroad. We are also a high-tech enterprise in the domestic power supply industry and core technology automation of test systems.
