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Monocrystalline silicon furnace harmonic control s

One, overview

1 single crystal furnace is a kind of inert gas environment, with a graphite heater will melt the polycrystalline material such as polysilicon, with the dislocation free Czochralski crystal growthequipment. The application of the single crystal furnace is very extensive, silicon, germanium,gallium arsenide crystal and so many products is extremely important raw materials of electronicindustry and other high-tech industries. With China's rapid economic growth, the application of the single crystal furnace will become more and more popular.

2 as one of the important branches of industrial furnace, furnace consumes a lot of energy, high electricity costs, harmonic pollution caused by the decline in product quality has become a large single crystal furnace user pain in my heart. Facing the urgent demand of environmental protection and energy saving furnace users at home and abroad in large numbers, many manufacturers have done a lot of useful attempt. Some tried to protect the class system transients, surge, high harmonic suppression products of single-crystal furnace system transformation, but the practice application shows that: the single crystal furnace harmonic number 5, 7, mainly for the 11 harmonic (5 times the maximum harmonic reached 45%, 7 20%, 11 11%, the total distortion rate of 49.43% the power factor, and the minimum is only 0.4570, the highest power factor is only 0.6464). So this can not be ignored harmonic control equipment, energy saving effect is not satisfactory, even more serious isthe harmonic energy far beyond the scope of electrical equipment to withstand, long-term use is easy to damage, accidents, affect the normal production, resulting in a waste of resources, so that users very upset.

A filter compensation device 3 for this kind of equipment is designed to solve the above problems effectively (in two ways: requirements for harmonic suppression and reactive power compensationare standard, we use the harmonic reactive power management branch + branch; only the requiredreactive power compensation can be normal operation, power factor calibration, we use theharmonic suppression and reactive power the compensation scheme), both harmonic and reactive power compensation, which can solve the harmonic pollution and improve power factor, the economic benefit is obvious, generally in 3 to 5 months to recover the investment cost.

Two, the main features

1 specifically for the user's system design and manufacture, eliminating the harmonic characteristics such as: 5 times, 7 times, 11 times, 13 times, the filtering effect is obvious;

2 both harmonic and reactive power compensation;

3 filtering device in power quality can be improved significantly, can improve the impact load caused by the current surge, reduce voltage fluctuation and voltage flicker mitigation, improve voltage stability, improve the quality of voltage. The power factor can be increased to more than 0.96,allowing users to reduce line losses of distribution transformers can increase the load efficiency,obvious economic benefit;

4 high performance vacuum switching the filter branch, perfect control system, complete protection function, has the short circuit protection, over voltage protection, over current protection, reliable operation, simple operation.

Three, the benefits of harmonic control

1 the installation of harmonic control device, effectively reduce the harmonic currents, increasing the effective capacity of the transformer, with a corresponding increase carrying capacity, reduce the expansion of investment required;

2 the installation of harmonic control device, can effectively reduce the transformer losses, improvethe safe operation of the transformer factor, the purpose of energy saving play.


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