Power supply for Chizhevsky's chandelier. Scheme, description

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Another power supply for the Chizhevsky chandelier. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Electronics in medicine

Comments on the article

Most devices designed to produce high voltage that feeds the Chizhevsky Chandelier can be divided into transistor voltage inverters and trinistor (and sometimes thyristor, since they use varieties of this group: dinistors, trinistors, triacs) pulse converters. The disadvantage of the former is the need to lower and rectify the mains voltage, which increases both the cost and the dimensions of the device. Trinistor devices [1 - 3] are relatively simple, which is the main argument in their favor. As a rule, trinistor devices operate on the principle of a half-wave arrester (Fig. 1).

Another power supply for the Chizhevsky chandelier

During one half-wave of the mains voltage, the storage capacitor C1 is charged, and during the other, it is discharged to the winding of the step-up transformer T1 through the trinistor VS1, which is turned on by the control system (CS). The differences sometimes come down only to the method of controlling the trinistor. The main disadvantage of such designs, according to the author, is the reduced frequency of the voltage multiplier supply, which can lead to an increase in the ripple at the output of the unit and a decrease in the efficiency of the "chandelier" [4]. In addition, sometimes it is possible to observe an increased noise level of the transformer, which is a consequence of the large amplitude of the current pulses. The author managed to avoid all this by developing a power supply, the circuit of which (without a high-voltage multiplier) is shown in Fig. 2.

(click to enlarge)

Let's take a look at his work.

The mains voltage is rectified by the diode bridge VD1. The ripple of the rectified voltage is smoothed out by the capacitor C1, the charging current of the capacitor at the moment the device is connected to the network is limited by the resistor R1. Capacitor C3 is charged through resistor R3. At the same time, a pulse generator, made on a unijunction transistor VT1, comes into action. Its "trigger" capacitor is charged through resistors R4, R5 from a parametric stabilizer made on a ballast resistor R2 and zener diodes VD2, VD3. As soon as the voltage on the capacitor C2 reaches a certain value, the transistor "triggers" and an opening pulse arrives at the control transition of the trinistor (Fig. 3, b).

Another power supply for the Chizhevsky chandelier

Capacitor C3 is discharged through the trinistor to the primary winding of the transformer (Fig. 3a). A high voltage pulse is formed on its secondary winding (Fig. 3c). The repetition rate of these pulses is determined by the frequency of the generator, which, in turn, depends on the parameters of the R4R5C2 chain. Trimmer resistor R5 can change the output voltage of the unit by about 1,5 times. In this case, the pulse frequency is regulated within 250 ... 1000 Hz. In addition, the output voltage changes when selecting the resistor R3 (in the range from 5 to 30 kOhm). The output voltage ripple does not exceed 5%, network interference is practically absent. =

It is desirable to use paper capacitors (C1 and C3 - for a rated voltage of at least 400 V; the diode bridge should be designed for the same voltage). Instead of what is indicated on the diagram, a trinistor T10-50 or, in extreme cases, KU202N is suitable. Zener diodes VD2, VD3 - any others, with a total stabilization voltage of approximately 18 V. The high-voltage multiplier can be borrowed from [1-3]. The transformer is made on the basis of the line TVS-110P2 from black-and-white TVs, but in principle others will do [5]. All primary windings must be removed and 70 turns of PEL or PEV wire with a diameter of 0,5 ... 0,8 mm should be wound onto the vacated space. Step-up winding (II) should not be touched.

Literature

Ivanov B. "Chizhevsky's chandelier" - with his own hands. - Radio, 1997, No. 1, p. 36, 37.
Biryukov S. "Chizhevsky's Chandelier" - with your own hands. - Radio, 1997, No. 2, p.34,35.
Utin V. Variants of the power supply unit "Chizhevsky's Chandeliers". - Radio, 1997, No. 10, pp. 42,43.
Chizhevsky A.L. Aeroionification in the national economy. - M.: Gosplanizdat, 1960.
Ivanov B. "Chizhevsky's chandelier": questions and answers. - Radio, 1997, No. 6, p. 33.

Author: G. Glukhenky, Cheboksary; Publication: N. Bolshakov, rf.atnn.ru

See other articles Section Electronics in medicine.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

New synchronous DC/DC voltage converters 22.03.2006

INTERNATIONAL, a world leader in power products, has released two new synchronous DC/DC voltage converters up to 30 V: IRF7835PbF and IRF7836PbF.

The converters are designed for applications that require small size, high efficiency and high power density (microprocessors, telecommunication systems). Chips are produced using lead-free technology.

Other interesting news:

▪ Sense ID technology

▪ 200MP ISOCELL HP1 image sensor

▪ The gadget is powered only by the heat of the human body

▪ Chernobyl immunity

▪ Big Data Technologies for Healthcare

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Labor protection. Selection of articles

▪ bugle article. Popular expression

▪ article What elementary particles are named after the cry of ducks? Detailed answer

▪ Article Bricklayer. Job description

▪ article Protecting the IP using the analog multiplier KR525PS2. Encyclopedia of radio electronics and electrical engineering

▪ Article Wonderful thread. Chemical experience

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews