An electric generator is a machine or installation designed to convert non-electric energy into electrical energy: mechanical energy into electrical energy, chemical energy into electrical energy, thermal energy into electrical energy, etc. Today, basically, when we use the word “generator”, we mean a mechanical converter energy into electrical energy.

It can be a diesel or gasoline portable generator, a nuclear power plant generator, a car generator, a homemade generator from an asynchronous electric motor, or a low-speed generator for a low-power wind turbine. At the end of the article, we will take as an example the two most common generators, but first we’ll talk about how they work. One way or another, from a physical point of view, the principle of operation of each of the mechanical generators is one and the same: the phenomenon of electromagnetic inductionwhen when crossing the magnetic field lines ...

Lead-acid batteries are widely used both as traction batteries (for example, to power electric forklifts) and as starter batteries for cars. Uninterruptible and backup power systems for homes and enterprises also use lead-acid batteries.

Autonomous power supply systems of houses often contain a high-capacity battery, or an assembly of several hundred ampere hours, designed to provide long-term power supply to the home. Such a battery can be charged from various alternative sources of electricity, such as a solar panel unit, a wind generator and others, and the battery is discharged traditionally through a powerful inverter, from which consumers are supplied with alternating current of industrial frequency and standard mains voltage ...

Large green lawns, winter gardens, outdoor tennis courts and golf courts, soccer fields, hotbeds, greenhouses and greenhouses, beds with seedlings, flower beds - cable heating systems for the soil can be useful everywhere. These systems allow you to use the soil as efficiently as possible to achieve several important goals, the main of which is to provide plants with the most favorable conditions for growth, regardless of the climate variability of your region.

A comfortable temperature in the basal and in the aboveground zone of plants creates an atmosphere of the most effective natural development even during periods of cold weather. As a result, productivity, fruitfulness, for example of greenhouses, increases: the soil composition changes due to the successful course of biological processes in it, as a result - plant vegetation accelerates - productivity increases. In such favorable conditions, you can ...

It is hardly possible today to find a person who would never use a cell phone. But does everyone understand how cellular communications work? What is the structure and work of what we are all used to for a long time? Are signals transmitted from base stations about wires or does it all work somehow differently? Or maybe all cellular communication functions only due to radio waves? We will try to answer these and other questions in our article, leaving the description of the GSM standard beyond its scope.

At the moment when a person is trying to make a call from his mobile phone, or when they start calling him, the phone is connected via radio waves to one of the base stations (the most accessible), to one of its antennas.Base stations can be seen here and there, looking at the houses of our cities, at the roofs and facades of industrial buildings, at high-rise buildings, and finally at the red and white mast specially built for the stations ...

An electric battery is a reusable chemical current source. The chemical processes inside the battery, in contrast to those in disposable galvanic cells, such as alkaline or salt batteries, are reversible. The cycles of charge-discharge, accumulation and return of electrical energy can be repeated many times.

So, the principle of operation of the battery allows you to cyclically use it for autonomous power supply of a variety of devices, portable devices, vehicles, medical equipment, etc. in completely different areas. Speaking the word "battery", they mean either the battery itself or the battery cell. Several series or parallel connected to each other battery cells form a battery, as well as several connected batteries. The first battery, that is, a galvanic cell ...

Requirements for the quality of electricity are prescribed by state standards and fairly stringent standards. Electricity supply organizations make a lot of efforts to comply with them, but they are not always implemented.

In our apartments, and in production, periodically occur: complete blackouts for an indefinite time, aperiodic short-term (10 ÷ 100 ms) high-voltage (up to 6 kV) voltage pulses, surges and voltage drops with different durations, overlays of high-frequency noise, frequency drifts . All these malfunctions adversely affect the work of household and office consumers of electricity. Microprocessor and computer devices, which not only fail, but can completely lose their performance, are especially affected by the quality of power supply. To reduce the risk of malfunctions ...

In the framework of this article, we will talk about the features of the principle device of automobile generators. For car owners who are versed in the subject, this article will not be interesting. But for those who are interested in automotive generators in terms of application, this information may be useful.

In modern cars, synchronous three-phase AC electric machines are used as generators, in which the Larionov circuit is used in the rectifier. In order for the generator to give current to the load after starting the engine, it is necessary to provide power to the field coil. This occurs when the ignition key is turned to the operating position. The current in the field winding is controlled by a voltage regulator, which can be made as a separate unit or integrated into the brush unit of the generator. In the vast majority of modern generators, a voltage stabilizer ...

RFID (Radio Frequency Identification) is a way to ensure the storage and transmission of information from a convenient label carrier to the desired location using special devices. Such identifier tags make it easier to recognize various objects: goods in the store, mobile vehicles during transportation, help determine their location, can identify people and animals, not to mention the wide possibilities of identifying documents and property.

The electromagnetic wave received by the RFID tag from the antenna activates it, and it becomes possible to write data to the tag and read data from the tag.The antenna thus serves as a multifunctional communication channel between the transceiver and the tag, which fully ensures the processes of data transmission and reception. Antennas of various shapes and sizes can be built into scanners, gates, turnstiles, - in different means for working with RFID ...