converter soft start saving energy

Frequency conversion and soft start energy saving analysis pick to: this paper introduces the electric equipment of the energy

consumption status and composition, the paper elaborated on frequency conversion and the energy saving principle of soft start.

And lists inverter in the fan and pump control in energy saving advantage and motor soft start effective fighting power grid

peak voltage process.
Keywords: converter soft start saving energy
One, introduction
With the acceleration of industrialization steps, saving energy and reducing consumption in the form of more and more severe,

some can reduce the loss of industrial electronic products are emerging. Inverter and soft starter application fields is more

and more widely, use is more frequent. In the motor and fan control, frequency control of motor speed and soft start energy-

saving effect is very obvious.
Second, the power energy consumption analysis
In order to
rotating joints guarantee the reliability of the production, various production machinery in the design with power driven, bore a

certain margin. Motor cannot be in full load under operation, in addition to achieve power driven requirements outside,

superfluous moment increased active power consumption, causing the waste of electric power, in the production process, because

the motor load variation range is very large, must be real-time adjustment fan pump flow. At present flow adjusting way more for

regulating valve adjustment, this kind of control mode is only changed channel flow impedance, and motor output power and does

not change much, often is the motor run at full speed at all times, regulator through the throttle to control production needs,

in fact is artificial way to increase resistance to regulate purpose, this kind of throttle control method to waste a lot of

electricity. When air reduce fan speed down, the motor power input rapidly reduces the. Such as air volume dropped to 80%, speed

n also dropped to 80%, the shaft power is down to 51% of the rated power; If the volume down to 50%, shaft power will decline to
rotary union the rated power 13%, its electricity saving potential is very large.
In the motor when started at full pressure, because motor start-up moment needs, from the power grid absorption 7 times of the

motor rated current, and large starting current is waste of electric power, the grid voltage fluctuation damage is very big

also, increased the line loss and variable loss. Big starting torque produce mechanical shock, to be driven equipment cause big

impact, shorten service life, the influence degree of accuracy. Such as make coupling damage, belt tearing, etc. Cause

mechanical transmission parts of abnormal wear and impact, accelerated ageing, shorten service life increase maintenance

workload. Motor hard start power to cause serious impact, but also to fiber optic rotary joint power grid capacity overstretch, started from the large

current and vibration on the baffle and valve damage greatly, the service life of the equipment, the line is bad. And the use of

soft start device, the use of frequency converter to soft start function will make starting current starting from scratch, no

more than the maximum current rating, reduce the impact of the power grid and the requirements of power supply capacity and

prolong the equipment and service life of the valve. Save the equipment maintenance. Motor starting current start from 0 - motor

rated current gradually increase, reduce the start current for the impact of the power grid, save electricity, also reduced the

start inertia of equipment large inertia speed impact, extend the life of the equipment.
Three, variable frequency energy saving analysis