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Ozonizer feeding device
| Details |
Inventors: Galliker, Josef;
Assignee: BBC Brown, Boveri & Company Limited (Baden, CH)
Primary Examiner: Shoop; William M.
Assistant Examiner:
Attorney, Agent or Firm: Oblon, Fisher, Spivak, McClelland & Maier
An ozonizer power feeding device comprising a multiphase power source having at least one terminal for each phase, a thyristor circuit coupled to the terminals of the power source and including at least two thyristors for each phase connected at one side thereof in an anti-parallel configuration to a respective terminal of the source, a transformer having at least one primary coil coupled to the other sides of the anti-parallel connected thyristors and a secondary coil adapted to be connected to an ozonizer for feeding power to the ozonizer, and a joint control unit coupled to each of the thyristors for controlling the conduction time thereof in dependence on the waveforms provided at the terminals of the source in order to derive a composite waveform applied to the transformer primary, wherein the composite waveform has a high frequency than that of any of the phases of the power source, thereby increasing ozone production which is proportional to the frequency of the applied power. |
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DETAILED DESCRIPTION Accordingly, the objects of this invention are to provide a novel ozonizer feeding device which permits an increase in the ozone output and thus an economical ozone production using simple technical means.
These and other objects are achieved according to the invention by providing a new and improved ozonizer power feeding device provided with a high-voltage transformer and including a thyristor circuit in which at least two thyristors are connected in an anti-parallel configuration between at least one system terminal each for one phase (R, S, T) and the high-voltage transformer and to a joint control unit.
In this way the frequency of the ozonizer power feeding can reach several times the system frequency, for example, three times or six times the amount with a three-phase system yielding higher ozone production as a result of higher frequencies.
Thus, approximately 2.
3 times the amount of ozone can be produced with three times the system frequency or approximately 3.
7 times the amount with six times the system frequency.
As noted above, due to the power feeding thyristor circuit according to the invention, an advantage is obtained that, in turn, positive and negative sections of the voltage amplitude can be connected of the (mostly three) phase from the multi-phase/three-phase current system.
These result in a one-phase alternating current of three times the system frequency so that approximately 2.
3 times the amount of ozone is produced in comparison with the system frequency.
Steep voltage increases are obtained which have a particularly advantageous effect on the ozone production.
The one-phase alternating voltage is brought to the desired ozonizer voltage with the help of a high-voltage transformer in the known manner.
Further advantages are realized according to the invention by providing a thyristor control unit including a blocking period setting member for setting the ignition points of the thyristors so that the ozone production can be regulated.
Also, by arranging the thyristors Y-connected in the case of a three-phase system, the device is only equipped with six thyristors
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Electrical and Wave 
