Electric motors. Schemes, articles of the Free Technical Library

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Electric motors. Schemes, articles, descriptions

Free library / Schemes of radio-electronic and electrical devices

Electric motors

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Equipment for micro and small hydro power plants

Section Alternative energy sources. MNTO INSET specializes in the development, serial production and packaged supply of hydroelectric units for small HPPs up to 5000 kW and micro HPPs with a capacity of 3 to 100 kW (Fig. 1.2). Micro hydroelectric power plants and hydroelectric units for small hydropower plants, produced by MNTO INSET, have high energy characteristics and are designed for operation in a wide range of pressures and flow rates. These are autonomous, environmentally friendly, fast-payback sources of electricity for the population of remote and hard-to-reach areas, as well as small industries. ... >>

Megashoker-2 (Improved high power stun gun circuit)

Section Security and safety. Personal safety. This scheme is an improved version of the original Megashocker scheme. Due to the use of a PWM controller with a complementary output, the heating of transistors in it is much less, respectively, the efficiency of the device is higher (> 90%). Transformers, EU-but, are the same as in the first version of the circuit. The frequency of the converter seems to be adjusted by R5, but C7, apparently, will have to be selected for the required power (starting somewhere with a thread from 2 nF). C7 must be rated for a voltage of at least 630v. For the rest, see the description for MegaShocker v1.1 Regarding the cross-sectional area of the T2 trance core: 450 sq. mm is not a joke, I even made 540 for myself. Only such a trance will transmit impulses with an energy of 1,8 ... 2,4 J without loss Dimensions of the device: there was an opinion here that the device would have to be carried along on a trolley. :) I authoritatively declare: nifiga - everything is in your hands! And in the wallet ... >>

Mounting and dismantling of elements

Section Ham Radio Technologies. Mounting on printed circuit boards. Before installation, printed conductors and contact pads must be prepared for soldering - cleaned of oxide film and dirt. If the installation is carried out immediately after the manufacture of the printed circuit board, then it is enough to wipe the conductors with a calico swab dipped in alcohol. If a lot of time has passed since the manufacture of the board and the metal coating has darkened (oxidized), then first it is necessary to clean it to a shine with a fine-grained sandpaper, and then rinse it thoroughly with alcohol. After degreasing, a thin layer of rosin flux is applied to all contact pads of the printed circuit board with a brush. ... >>

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Articles on electric motors

Articles on electric motors; electric motor schemes; descriptions of electric motors: 149 articles

All articles for an electrician

Regulatory documentation for an electrician

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Artificial retina will help the blind 01.09.2012

An artificial retina has been created that can restore normal vision even to completely blind people. Researchers at Weill Cornell Medical College have deciphered the neural network of the mouse retina. Thanks to this, it was possible to create an artificial eye, which made it possible to restore sight to blind mice. Moreover, the code of the retina of monkeys has already been "hacked" in a similar way - and it is almost identical to the human one. The authors of the discovery hope that they will be able to quickly develop and test a device that blind people can use to fully restore vision.

This breakthrough will give the blind the opportunity to fully restore normal vision, and not only see the contours of objects and spots of light, although this is already enough for orientation in space. The decoding of the code was successful, and the new device will allow you to see individual facial features. Currently, experimental animals can easily track moving images with it. In the future, scientists hope to create a small wearable device in the form of a hoop or glasses. This device will collect light and, with the help of computer chips, turn it into an electronic code that the human brain transforms into an image. The technology of converting light signals into electronic ones has long been mastered by mankind, so no problems are expected with this.

Blindness is often the result of diseases of the retina, but even if all photoreceptors are lost, as a rule, the nerve output pathway of the retina remains intact. Modern prostheses already use this fact: electrodes are implanted into the eye of a blind patient, stimulating ganglionic nerve cells. However, this technology gives only a blurry picture, in which only the contours of objects can be seen.

Other research groups are testing the use of photosensitive proteins as an alternative way to stimulate cells. These proteins are introduced into the retina using gene therapy. Once in the eye, they can stimulate many ganglion cells at once. So far, this technology has been successfully tested for safety for health. In any case, to form a clear picture, you need to know the code of the retina, a set of equations that nature uses to turn light into electrical impulses that the brain understands. Scientists have already tried to find it for simple objects, such as, for example, geometric shapes. Neurologist Dr. Sheila Nirenberg suggested that the code should be generic and work with figures as well as landscapes or human faces.

While working on the code, Nirenberg, she said, had an epiphany: she realized that it could be used for prosthetics. As a result, a simple experiment was prepared, during which a mini-projector, controlled by a decoded code, sent light pulses to light-sensitive proteins inserted into ganglion cells of mice using gene manipulation. Careful control of a series of experiments showed that the efficiency, i.e. the quality of vision even in a prosthesis hastily assembled in the laboratory practically coincides with that of a normal healthy mouse retina.

A new approach to treating visual impairment gives hope to the 25 million people worldwide who suffer from retinal blindness. Drug therapy helps only a few of them, and a perfect prosthesis will be extremely useful.

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