RU2263628C2 - Power supply apparatus for ozone generator - Google Patents

Abstract

FIELD: electrical engineering, in particular, equipment used in pulse-type power supply units, more particular, in domestic ozone generators.

SUBSTANCE: apparatus has high-voltage pulse transformer and accumulating vessel connected in series, diode and switching member connected in parallel with pulse transformer and accumulating vessel in mutually opposite directions, additional accumulating vessel connected in series with said accumulating vessel, with one face plate of additional accumulating vessel functioning as terminal for connection to electric mains. Dynistor or thyristor used in dynistor mode functions as switching member. Secondary winding of high-voltage pulse transformer may be formed from sections isolated from one another and connected in series with one another. Stabilitron may be switched to thyristor used in dynistor mode.

EFFECT: simplified construction, reduced manufacturing costs, enhanced reliability in operation, increased efficiency of apparatus and increased energetic yield of ozone.

3 cl, 1 dwg

Description

The invention relates to electrical engineering and can be used in power supply devices of pulse installations, in particular household ozone generators.

Known power supply devices for household ozone generators typically include a high-voltage pulse transformer, a storage capacitor, a ballast resistor, a key element (thyristor, triac, etc.), a key element control unit, a rectifier bridge, etc. /1/. One of the drawbacks of these power supply devices for ozone generators is the presence of resistive ballast, which releases a significant part of the consumed electrical energy in the form of heat. This leads to a decrease in the efficiency of the power supply device of the ozone generator, heating of the resistive ballast and other elements of the device, which, in turn, can lead to unstable operation, failure, and fire of these elements (that is, the reliability of the device as a whole decreases).

A power supply device for household ozone generators is also known, which is the closest to the proposed device and selected as a prototype, containing a high-voltage pulse transformer, in the primary circuit of which there is a diode, a storage capacitor, a thyristor switch shunted by a reverse diode, to which a thyristor key control unit is connected made on transistors, and an ozone generator / 2 is connected to the terminals of the secondary winding of the high-voltage pulse transformer /.

Among the disadvantages of this device are the following:

- the presence of a complex thyristor key control unit, which is undesirable in household devices;

- low reliability of the operation of this device, due to the following circumstance. It is known that during power surges, spontaneous opening of the thyristor key can occur. In this case, a breakdown of the diode and elements of the thyristor switch control unit occurs in this device, which leads to failure of the entire device;

- the presence of a relatively large number of radioelements, which increases the cost, the probability of failure, the complexity of the manufacture of this device;

- a relatively low amplitude value of the electric voltage on the plates of the storage capacitance. This, in turn, leads to a relatively low productivity of the ozone generator, since the amount of electric energy accumulated on the plates of the storage capacity and transmitted to the ozone generator is proportional to the square of the voltage on this capacity;

- the relatively small steepness of the front of the current pulse supplied to the primary winding of a high voltage pulse transformer. With an increase in this steepness, the efficiency of the high-voltage pulse transformer and the energy output of ozone / 3 / increase;

- the relatively small steepness of the front of the output pulse of the high-voltage pulse transformer, which is due to the relatively high value of the inter-turn parasitic capacitance of the turns of the secondary winding of the high-voltage pulse transformer. It is known that with an increase in this steepness, the energy yield of ozone also increases / 3 /.

The technical problem of the invention to be solved is the simplification, cost reduction, increasing the reliability of operation, efficiency and efficiency of the power supply device of the ozone generator, increasing the energy yield of ozone.

The solution of the technical problem in the power supply device of the ozone generator, containing a high-voltage pulse transformer and a storage capacitor connected in series, to which a diode and a key element are connected in parallel in mutually opposite directions, is achieved by the additional storage capacitance connected in series to the storage capacitor, one lining of which is a terminal to connect to the mains, and the key element is the dinistor or thyristor in the dinistor mode.

The secondary winding of a high-voltage pulse transformer can be made of sections isolated from each other, connected in series.

A zener diode can be connected to the thyristor in dynistor mode.

The drawing shows a schematic diagram of a power supply device for an ozone generator.

The power supply device of the ozone generator comprises a high-voltage pulse transformer 1 connected in series and a storage capacitance 2, to which a diode 3 and a dynistor 4 (or a thyristor 5 in a dynistor mode) are connected in opposite directions. In series, an additional storage capacity 6 is connected to the storage tank 2, one lining of which is a terminal for connection to the electric network. A zener diode 7 can be connected to the thyristor 5. An ozone generator 8 is connected to the terminals of the secondary winding of the high-voltage pulse transformer 1.

The power supply device of the ozone generator operates as follows. When this device is connected to the electric network in the first half-cycle of the mains voltage (diode 3 is open), the additional storage capacitance 6 is charged through the diode 3 to the amplitude value of the mains voltage. In the next half-period (diode 3 is closed), the voltage of the network and the additional storage capacitance 6 are added, since the charge polarity in this capacitance 6 in this half-period coincides with the polarity of the network. In this case, the storage capacitance 2 is charged to the unlock voltage of the dinistor 4 (or thyristor 5). In particular, if the proposed device uses a dinistor 4 with a unlock voltage that is approximately two times higher than the amplitude value of the mains voltage, then the voltage on the plates of the storage capacitance 2 at the moment of opening the dinistor 4 will be approximately two times higher than the amplitude value of the mains voltage, i.e. will be twice the voltage on the plates of the storage capacity of the prototype. In the process of unlocking the dinistor 4 (or thyristor 5), the storage capacitance 2 is quickly discharged through the primary winding of the high-voltage pulse transformer 1. In this case, in the case of the above-mentioned double excess of the voltage on the plates of the storage capacitance 2 over the voltage on the plates of the storage capacitance of the prototype, first, approximately four-fold compared with the prototype, the increase in energy transmitted to the ozone generator 8 through a high-voltage pulse transformer 1. Secondly, provided ichenie steepness of the current pulse through the primary winding of the high-voltage pulse transforomatora 1. Simultaneously with the discharged storage tank 2 takes place additional vacuum storage container 6 via dynistor 4 (or thyristor 5). In this case, the discharge currents of the storage capacitance 2 and the additional storage capacitance 6 through the dinistor 4 (or thyristor 5) add up, that is, the discharge current increases through the dinistor 4 (or thyristor 5), which leads to a decrease in the dynamic resistance of the pn junctions of the dinistor 4 ( or thyristor 5). This also contributes to an increase in the steepness of the front of the current pulse through the primary winding of the high voltage pulse transformer 1 in comparison with the corresponding characteristic of the prototype. The short current pulse thus formed in the primary winding of the high-voltage pulse transformer 1 induces a high-voltage emf on the secondary winding of this transformer, providing conditions for ignition of the barrier discharge in the ozone generator 8. The zener diode 7 connected to the thyristor 5 operating in the dynistor mode allows you to set the necessary the opening voltage of this thyristor 5 and stabilize the energy stored in the storage tank 2.

Example. In the power supply device of the ozone generator, shown in the drawing, the following radio elements were used: high-voltage pulse transformer with K = 1: 100; storage capacity 2 with a capacity of 0.5 μF; diode 3 with I _CR = 1 A; dinistor 4 with a release voltage of 400 V; additional storage capacity 6 with a capacity of 2.5 microfarads. To eliminate interference in the electrical network, the device was connected via an LC pulse filter. Tests of the proposed device and prototype were carried out using the same high-voltage pulse transformer 1 and storage capacitance 2. The amplitude and slope of the front of the output voltage pulse of the high-voltage pulse transformer 1 were measured from the waveforms of the corresponding pulses. The test results showed that when switching from the prototype to the claimed device, the amplitude and steepness of the front of the output pulse of the high-voltage pulse transformer 1 increase by more than 1.7 and 3 times, respectively. Tests were also made of the claimed device and prototype with two high-voltage pulse transformers 1 having the same cores and number of turns, but differing in the way of winding these turns: in the first transformer, the windings were made in a row (in bulk), and in the second - in isolated from each other sections connected in series. Tests have shown that both in the claimed device and in the prototype when replacing the first transformer with the second (that is, when executing a high-voltage pulse transformer 1 from sections isolated from each other, connected in series), the amplitude and steepness of the front of the output voltage pulse increase high-voltage pulse transformer 1 is approximately 1.3 times.

Compared with the prototype, the proposed device power supply of the ozone generator has the following advantages:

- a smaller number of radioelements used in the device, which reduces its cost, makes the device simpler and more compact, simplifies the manufacturing process;

- higher reliability, which is associated with a smaller number of radio elements used and the exclusion of breakdown of these elements;

- higher efficiency. Indeed, as shown above, with the same parameters of the storage capacitance and high-voltage pulse transformer in the proposed device provides a significant increase in energy transmitted from the electric network to the ozone generator;

- a higher value of the efficiency of the device, which is ensured, on the one hand, by the absence of active resistances, and on the other, by a higher steepness of the edges of the current pulse through the primary winding of the high voltage pulse transformer and the output pulse of this transformer. It is known that with an increase in the steepness of these fronts, both the efficiency and the efficiency of the high-voltage pulse transformer, and the efficiency of ozone formation / 3 / increase.

Thus, the proposed technical solution eliminates all of the above disadvantages of the prototype and solves the problem.

Literature

1. Household ozonizing installation "Ozonid" TU 3468-001-22627662-93.

2. Rudenko B. Ozonizers for the home. - Science and life. M .: Pravda, 1990, No. 4, p. 112.

3. Samoilovich V. G., Gibalov V. I., Kozlov K. V. Physical chemistry of a barrier discharge. M.: Publishing House of Moscow State University, 1989, 176 p.

Claims (3)

1. A power supply device for an ozone generator, comprising a high-voltage pulse transformer and a storage capacitor connected in series, to which a diode and a key element are connected in parallel in opposite directions, characterized in that an additional storage capacitor is connected in series to the storage capacitor, one lining of which is a terminal for connection to electric network, and the key element is a dinistor or thyristor in dinistra mode. 2. The device according to claim 1, characterized in that the secondary winding of the high voltage pulse transformer is made of sections isolated from each other, connected in series. 3. The device according to claim 1, characterized in that the zener diode is connected to the thyristor in the dinistra mode.