obo bettermann electrical components German obo bettermann models obo bettermann prices

obo bettermann electrical components are energy conversion devices that convert sound signals into electrical signals. Types include moving-coil, condenser, electret, and the recently emerging silicon microphones, as well as liquid microphones and laser microphones. Most microphones are electret condenser microphones, which operate using a polymer diaphragm with permanently isolated charge.

obo bettermann electrical components principle

A resistor consists of three parts: the resistive element, the former, and the leads (for solid-core resistors, the resistive element and former are combined into one), and only the resistive element determines the resistance value. The volt-ampere characteristic is represented by a graphical curve showing the relationship between voltage and current at the resistor terminals; when voltage and current are proportional (the characteristic is a straight line), it is called a linear resistor; otherwise, it is called a non-linear resistor. The maximum power dissipation allowed for continuous operation of the resistor at the rated temperature (maximum ambient temperature) tR. For each resistor, a maximum operating voltage is also specified; that is, even if the rated power is not reached, the maximum operating voltage must not be exceeded when the resistance value is high. The rated power of a resistor refers to the maximum power allowed to be consumed during long-term continuous operation in DC or AC circuits. Load characteristics: When the ambient working temperature is below tR, the resistor must not exceed its rated power; when it exceeds tR, the load power must be reduced. Each resistor has specified load characteristics. In addition, the allowable load is correspondingly reduced under low atmospheric pressure. Under pulse load, the average pulse power is far lower than the rated power, and separate specifications generally apply.

obo bettermann electrical component types

There are many types of loudspeakers. According to their transduction principle, they can be divided into electrodynamic (i.e., moving-coil), electrostatic (i.e., condenser), electromagnetic (i.e., armature), piezoelectric (i.e., crystal), etc.; the latter two are mostly used in rural wired broadcasting networks. According to frequency range, they can be divided into low-frequency, mid-frequency, and high-frequency loudspeakers, which are often used as combination loudspeakers in speaker enclosures. Classified by transduction mechanism and structure: electrodynamic (electrodynamic), condenser (electrostatic), piezoelectric (crystal or ceramic), electromagnetic (spring-loaded), ionophone, and pneumatic loudspeakers, etc. Electrodynamic loudspeakers are widely used due to advantages such as good electroacoustic performance, robust structure, and low cost. Classified by sound radiation material: paper cone, horn, and diaphragm types. Classified by paper cone shape: circular, oval, dual paper cone, and rubber surround. Classified by operating frequency: bass, midrange, and treble; some are further divided into recorder-specific, TV-specific, general-purpose, and hi-fi loudspeakers. Classified by voice coil impedance: low impedance and high impedance. Classified by effect: direct radiation and ambient sound, etc. Loudspeakers are divided into built-in and external loudspeakers, with external loudspeakers generally referring to speaker enclosures. Built-in loudspeakers refer to MP4 players having built-in speakers, allowing users to listen to the sound from the MP4 player not only through the headphone jack but also through the built-in speakers. MP5 players with built-in speakers can operate without external speakers and avoid the inconvenience of wearing headphones for extended periods.

obo bettermann electrical component classification

Based on the working power supply, electric motors can be divided into DC motors and AC motors. AC motors are further divided into single-phase and three-phase motors. Based on structure and working principle, motors can be divided into DC motors, asynchronous motors, and synchronous motors. Synchronous motors can be further divided into permanent magnet synchronous motors, reluctance synchronous motors, and hysteresis synchronous motors. Asynchronous motors can be divided into induction motors and AC commutator motors. Induction motors include three-phase asynchronous motors, single-phase asynchronous motors, and shaded-pole asynchronous motors. AC commutator motors include single-phase series-wound motors, AC/DC universal motors, and repulsion motors. Based on starting and running methods, motors can be divided into capacitor-start single-phase asynchronous motors, capacitor-run single-phase asynchronous motors, capacitor-start-run single-phase asynchronous motors, and split-phase single-phase asynchronous motors. Based on application, motors can be divided into drive motors and control motors. Drive motors include motors for power tools, household appliances, and other general small mechanical equipment. Control motors include stepper motors and servo motors. Based on rotor structure, motors can be divided into squirrel-cage induction motors and wound-rotor induction motors. Based on operating speed, motors can be divided into high-speed, low-speed, constant-speed, and variable-speed motors.

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