BOSCH electrical components Germany BOSCH model BOSCH price

BOSCH electrical components refer to electronic components that generate resonant frequencies, commonly divided into quartz crystal resonators and ceramic resonators. They function to generate frequency, featuring stability and good anti-interference performance, and are widely used in various electronic products. The frequency accuracy of quartz crystal resonators is higher than that of ceramic resonators, but the cost is also higher. Resonators mainly serve the role of frequency control; all electronic products involving frequency transmission and reception require resonators. Resonator types can be divided into through-hole and surface-mount types based on their form factor.

BOSCH electrical component classification

Classification by operating principle or structural characteristics of relays: (1) Electromagnetic relay: an electrical relay that operates using the attractive force generated between the electromagnet core and the armature by the current in the input circuit. (2) Solid-state relay: a relay where electronic components perform its functions without mechanical moving parts, providing isolation between input and output. (3) Temperature relay: a relay that activates when the ambient temperature reaches a set value. (4) Reed relay: a relay that opens, closes, or switches circuits using the action of reed contacts sealed in a tube, which serve both as contact springs and part of the armature magnetic circuit. (5) Time delay relay: a relay whose output section delays or limits operation to a specified time before closing or opening the controlled circuit when an input signal is applied or removed. (6) High-frequency relay: a relay used for switching high-frequency and RF lines with minimal loss. (7) Polarized relay: a relay that operates due to the combined effect of a polarizing magnetic field and the magnetic field generated by the control current passing through the control coil. The direction of relay operation depends on the direction of the current flowing through the control coil. (8) Other types of relays: such as optical relays, acoustic relays, thermal relays, instrument relays, Hall effect relays, differential relays, etc.

BOSCH electrical component principles

Potentiometric displacement sensors convert mechanical displacement into resistance or voltage output that has a linear or arbitrary functional relationship with the displacement via potentiometer elements. Standard linear and rotary potentiometers can be used as linear displacement and angular displacement sensors, respectively. However, potentiometers designed for displacement measurement require a definite relationship between displacement change and resistance change. The movable wiper of the potentiometric displacement sensor is connected to the measured object. The object's displacement causes a change in resistance at the potentiometer's moving terminal. The magnitude of the resistance change reflects the amount of displacement, while whether the resistance increases or decreases indicates the direction of displacement. Typically, a supply voltage is applied across the potentiometer to convert the resistance change into a voltage output. In wire-wound potentiometers, the resistance changes in steps corresponding to the turn-to-turn resistance as the wiper moves, resulting in a stepped output characteristic. If such a displacement sensor is used as a displacement feedback element in a servo system, excessive step voltages can cause system oscillation. Therefore, the resistance per turn should be minimized during potentiometer manufacturing. Another major disadvantage of potentiometric sensors is susceptibility to wear. Their advantages include simple structure, large output signal, ease of use, and low cost.

BOSCH electrical component classification

For most conductors, at a certain temperature, the resistance remains almost constant at a fixed value; this type of resistance is called linear resistance. For some materials, the resistance changes significantly with current (or voltage), and their volt-ampere characteristic is a curve; this type of resistance is called nonlinear resistance. For a nonlinear resistor under a given voltage (or current), the ratio of voltage to current is the static resistance at that operating point, and the slope of the volt-ampere characteristic curve is the dynamic resistance. The expression of nonlinear resistance characteristics is complex, but these nonlinear relationships are widely applied in electronic circuits.

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