Energy-saving way of air compressor inverter

Energy-saving way of air compressor inverter

The energy-saving measures for frequency converters mainly reflect the use of current fans, pumps, and hoists. In order to ensure the reliability of production, all kinds of production machinery have a certain margin when they are equipped with power drives. Do you know how energy-saving inverters can save 30% of power? Since the soft starter is a straight start, auto-coupling and star-delta starter to the transition product of the frequency converter, except for the working condition of the motor task load above 90%, the frequency converter can be used for other working conditions. The inverter can save energy by about 30%. When the motor cannot run under full load, in addition to the power drive request, the remaining torque increases the consumption of active power, resulting in the waste of electrical energy. The use of frequency converters can effectively deal with this problem:

Power factor compensation saves energy. Reactive power not only increases line loss and heat generation of equipment, but more importantly, the fall of power factor invites the fall of active power of the telephone network. A lot of reactive power consumption costs are near the line, and the use of equipment power is low, which is severe. After using variable frequency speed regulation equipment, due to the effect of the internal filter capacitor of the inverter, the reactive power loss is reduced and the active power of the power grid is increased.

Soft-start energy-saving, hard-start motors have severe impacts on the power grid, and also demand too high grid capacity. The large currents and sensations that occur during startup are extremely harmful to baffles and valves, and the use of equipment and pipelines Life expectancy is extremely bad. After using variable frequency energy-saving equipment, the use of the soft starting function of the frequency converter will make the starting current start from zero, and the maximum value will not exceed the rated current, which reduces the impact on the power grid and the request for power supply capacity, and extends the use of equipment and valves. Life, saving equipment maintenance costs.

The traditional speed regulation method of variable frequency speed regulation energy-saving fans, pumps and other equipment is to adjust the inlet or outlet baffle and valve opening to adjust the air supply and water supply. The input power is large, and a lot of power is consumed in the baffle, In the process of valve closure. After using variable frequency speed regulation, if the flow rate (air volume) is small, the request can be met by the speed of the falling pump or fan. At this moment, the running power of the motor drops accordingly, and then the intention to save energy is reached. (From fluid mechanics, p (power) = q (flow) × h (pressure), flow q is proportional to the first power of speed n, pressure h is proportional to the square of speed n, power p is proportional to the cube of speed n Proportionally, if the power of the water pump is certain, when the flow rate is requested to be adjusted, the speed n can be a share drop, and the shaft output power p is set to drop.

　　 is the relationship between the power consumption of the pump motor and the rotation speed approximately in a square ratio. When the requested flow rate q is reduced, the output frequency of the inverter can be adjusted to make the motor speed n drop in proportion. At this time, the power p of the motor will drop drastically according to the cubic connection, which is 40%-50% more energy-saving than the regulating baffle and valve, and then reaches the intention of saving electricity. )

　　Special dedicated energy-saving frequency converters are mainly used in injection molding machines and air compressors. It can save power by 15%-60%, which greatly reduces the production cost of the enterprise. In fact, the energy-saving effect of the inverter is inherent. Using frequency conversion speed control can greatly improve the control accuracy of the motor speed.