Telegartner electrical components Germany Telegartner model Telegartner price

Telegartner electrical components are instruments that measure by converting high primary current to low secondary current based on the principle of electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series with the circuit where the current needs to be measured. Therefore, the full line current often flows through it. The secondary winding has many more turns and is connected in series with measuring instruments and protection circuits. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the coils connected in series with the measuring instruments and protection circuits is very small, and the operating state of the current transformer is close to a short circuit. The current transformer converts high primary current to low secondary current for measurement; the secondary side must not be open-circuited. The principle of the current transformer is based on electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series with the circuit where the current needs to be measured, so the full line current often flows through it. The secondary winding has many more turns and is connected in series with measuring instruments and protection circuits. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the coils connected in series with the measuring instruments and protection circuits is very small, and the operating state of the current transformer is close to a short circuit.

Telegartner electrical component principles

Electrodynamic loudspeakers, also known as moving-coil loudspeakers, are electroacoustic transducers applying the electrodynamic principle. They are the most widely used loudspeakers, primarily for three reasons: 1. Electrodynamic loudspeakers have a simple structure and are easy to manufacture. They do not require large space, resulting in low prices and widespread adoption. 2. These loudspeakers can achieve excellent performance, obtaining uniform frequency response in the mid-frequency range. 3. These loudspeakers are continuously improving. Decades of loudspeaker development history represent the continuous improvement of loudspeaker design, craftsmanship, and materials, as well as the history of performance keeping pace with the times. Electrodynamic loudspeakers are mostly cone-shaped or dome-shaped. The structure of a cone loudspeaker can be divided into three parts: 1. The vibration system includes the diaphragm, voice coil, centering spider, dust cap, etc. 2. The magnetic circuit system includes the upper pole plate, pole piece, lower pole plate, magnet, etc. 5. The auxiliary system includes the basket, surround, terminal board, and phase plug. According to Faraday's law, when a current-carrying conductor passes through a magnetic field, it experiences an electrodynamic force. Its direction conforms to Fleming's left-hand rule, and the force is perpendicular to both the current and the magnetic field directions. The magnitude of the force is proportional to the current, wire length, and magnetic flux density. When alternating audio current is input to the voice coil, the voice coil experiences an alternating driving force, producing alternating motion. This drives the paper cone to vibrate, repeatedly pushing air to produce sound.

Telegartner electrical component principles

When the voltage applied to a varistor is below its threshold, the current flowing through it is extremely small, equivalent to a resistor with infinite resistance. That is, when the voltage applied across it is below its threshold, it acts like a switch in the open state. When the voltage applied to a varistor exceeds its threshold, the current flowing through it surges, equivalent to a resistor with infinitesimal resistance. That is, when the voltage applied across it is above its threshold, it acts like a switch in the closed state. Protection principle of surge absorbers: In the standby state, the varistor has very high impedance (several megaohms) relative to the protected electronic components and does not affect the characteristics of the original design circuit. However, when instantaneous surge voltage appears (exceeding the breakdown voltage of the surge absorber), the impedance of the surge absorber drops low (only a few ohms), causing a short circuit in the line. Thus, electronic products or more expensive components are protected.

Telegartner electrical component types

There are many types of loudspeakers. According to their transduction principle, they can be classified into electrodynamic (moving-coil), electrostatic (capacitive), electromagnetic (reed), piezoelectric (crystal), etc. The latter two are mostly used in rural wired broadcasting networks. According to frequency range, they can be classified into low-frequency, mid-frequency, and high-frequency loudspeakers, which are often used as combination loudspeakers in speaker cabinets. Classified by transduction mechanism and structure, there are moving-coil (electrodynamic), capacitive (electrostatic), piezoelectric (crystal or ceramic), electromagnetic (spring-loaded), ionophone, and pneumatic loudspeakers. Electrodynamic loudspeakers have advantages such as good electroacoustic performance, sturdy structure, and low cost, and are widely used. Classified by sound radiation material, there are paper cone, horn, and diaphragm types. Classified by paper cone shape, there are circular, oval, double paper cone, and rubber surround types. Classified by operating frequency, there are bass, midrange, and treble. Some are further divided into recorder-specific, TV-specific, general-purpose, and hi-fi loudspeakers. Classified by voice coil impedance, there are low-impedance and high-impedance types. Classified by effect, there are direct radiation and ambient sound types. Loudspeakers are divided into built-in and external loudspeakers, with external loudspeakers generally referring to speaker cabinets. Built-in loudspeakers mean that the MP4 player has built-in speakers, allowing users to listen to the sound emitted by the MP4 player not only through the headphone jack but also through the built-in speakers. MP8 players with built-in speakers can operate without external speakers and avoid the inconvenience of wearing headphones for extended periods.

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