lemo electrical components German lemo models lemo prices

lemo electrical components are transducers that convert electrical signals into acoustic signals. The performance of the speaker significantly affects sound quality. In audio equipment, the speaker is the weakest component, yet it is the most critical for audio effect. There are many types of speakers with widely varying prices. Audio electrical energy causes the paper cone or diaphragm to vibrate through electromagnetic, piezoelectric, or electrostatic effects, resonating with the surrounding air to produce sound. Plastic speaker enclosures, due to their thin walls and inability to overcome resonance, offer poor sound quality (although some well-designed plastic speakers are far superior to low-quality wooden ones); wooden enclosures reduce coloration caused by box resonance, generally providing better sound quality than plastic ones. Multimedia speakers typically use a two-way, two-unit design: a smaller speaker handles mid-to-high frequencies, while a larger one handles mid-to-low frequencies. When selecting speakers, consider the materials of these drivers. The tweeters in active multimedia speakers are mostly soft dome types (such as titanium film domes for analog sources), which reduce the harshness of high-frequency signals from digital sources, providing a cool, delicate, and ethereal sound. Current multimedia speakers mostly use soft dome tweeters with good-quality silk membranes and lower-cost PV membranes.

lemo electrical component performance

The main performance indicators of speakers include sensitivity, frequency response, rated power, rated impedance, directivity, and distortion. (1) Rated Power: Speaker power is categorized into nominal power and maximum power. Nominal power, also called rated power or non-distortion power, refers to the maximum input power allowed within the rated non-distortion range. The power value marked on the speaker's label or technical manual is this rated power. Maximum power refers to the peak power the speaker can withstand instantaneously. (2) Rated Impedance: Speaker impedance is generally frequency-dependent. (3) Frequency Response: When audio signals of the same voltage but different frequencies are applied to a speaker, the resulting sound pressure varies. Typically, sound pressure is higher at mid-frequencies and lower at low and high frequencies. The frequency range of high and low tones where the sound pressure drops to a specific value relative to the mid-frequency is called the speaker's frequency response characteristic. (4) Distortion: Distortion occurs when a speaker fails to accurately reproduce the original sound. There are two types: frequency distortion and nonlinear distortion. Frequency distortion results from unequal amplification of different frequency signals, disrupting the original balance of loudness and altering timbre. Nonlinear distortion arises from inconsistencies between the vibration of the speaker's system and the signal fluctuations, adding new frequency components to the output sound. (5) Directivity Characteristic: This characterizes the distribution of sound pressure radiated by the speaker in various spatial directions. Higher frequencies result in narrower directivity, and larger cones result in stronger directivity.

lemo electrical component applications

The most basic application of ordinary thyristors is controlled rectification. The familiar diode rectifier circuit is an uncontrolled rectifier. Replacing diodes with thyristors creates a controlled rectifier circuit. Taking the simplest single-phase half-wave controlled rectifier circuit as an example, during the positive half-cycle of the sinusoidal AC voltage U2, if the control gate of VS receives no trigger pulse Ug, VS will not conduct. The thyristor conducts only when U2 is in the positive half-cycle and a trigger pulse Ug is applied to the control gate. Its waveforms (c) and (d) show that voltage UL appears across the load RL only when the trigger pulse Ug arrives. If Ug arrives early, the thyristor conducts earlier; if Ug arrives late, conduction is delayed. By changing the arrival time of the trigger pulse Ug at the control gate, the average value of the output voltage UL across the load can be adjusted. In electrical engineering, half a cycle of AC is often defined as 180°, known as the electrical angle. Thus, in each positive half-cycle of U2, the electrical angle from zero to the instant the trigger pulse arrives is called the control angle α; the electrical angle during which the thyristor conducts in each positive half-cycle is called the conduction angle θ. Clearly, α and θ represent the conduction or blocking range of the thyristor during the half-cycle of forward voltage. By changing the control angle α or conduction angle θ, the average value of the pulsed DC voltage UL across the load is changed, achieving controlled rectification. Low-power plastic-sealed bidirectional thyristors are typically used in sound-and-light-controlled lighting systems, with rated currents less than 6A. Medium and high-power plastic-sealed and metal-sealed thyristors are typically used in power-type controlled voltage regulation circuits, such as adjustable DC power supplies. High-power high-frequency thyristors are typically used in industrial applications such as high-frequency melting furnaces.

lemo electrical component parameters

The main parameters of transistors include current amplification factor, dissipation power, frequency characteristics, maximum collector current, maximum reverse voltage, and reverse current. Amplification Factor: The DC current amplification factor, also known as static current amplification factor or DC gain, is the ratio of collector current to base current when no varying signal is input (static state). AC Gain: The AC gain, also known as AC current amplification factor or dynamic current amplification factor, is the ratio of the change in collector current to the change in base current under AC conditions. Dissipation Power: Dissipation power, also called maximum allowable collector dissipation power PCM, is the maximum collector power dissipation when transistor parameter changes do not exceed specified limits. Dissipation power is closely related to the maximum allowable junction temperature and maximum collector current. During operation, the actual power consumption of the transistor must not exceed the PCM value, otherwise overload damage will occur. When the operating frequency exceeds the cutoff frequency, the current amplification factor decreases as frequency increases. The maximum oscillation frequency is the frequency at which the power gain drops to 4. Typically, the maximum oscillation frequency of high-frequency transistors is lower than the common-base cutoff frequency, while the characteristic frequency is higher than the common-base cutoff frequency but lower than the common-collector cutoff frequency. Maximum Current: The maximum collector current is the highest current allowed to pass through the collector. Maximum Reverse Voltage: The maximum reverse voltage is the highest working voltage allowed during operation. It includes collector-emitter reverse breakdown voltage, collector-base reverse breakdown voltage, and emitter-base reverse breakdown voltage. Collector reverse breakdown voltage is the maximum allowable reverse voltage between collector and emitter when the base is open. Base reverse breakdown voltage is the maximum allowable reverse voltage between collector and base when the emitter is open. Emitter reverse breakdown voltage is the maximum allowable reverse voltage between emitter and base when the collector is open. The reverse current between base and collector, also known as collector junction reverse leakage current, is the reverse current between collector and base when the emitter is open. The reverse breakdown current between emitter and collector, also known as penetration current, is the reverse leakage current between collector and emitter when the base is open. A smaller value indicates better transistor performance.

Weidou Intelligent Technology professionally sells German lemo connectors, lemo switches, lemo relays, lemo controllers, lemo plugs, lemo sensors, lemo resistors, lemo capacitors, lemo buses, lemo modules, lemo cables, lemo power supplies, lemo interfaces, lemo gateways, lemo circuit breakers, lemo original imports from Germany. Customers are welcome to inquire and order.