FERMAX electrical components German FERMAX models FERMAX prices

FERMAX electrical components are transducers that convert electrical signals into acoustic signals. The performance of the loudspeaker significantly affects sound quality. In audio equipment, the loudspeaker is the weakest component, yet it is the most critical for audio performance. There is a wide variety of loudspeakers with significant price differences. 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, where a smaller loudspeaker handles mid-to-high frequencies and a larger one handles mid-to-low frequencies. When selecting speakers, consider the materials of these drivers: the tweeters in active multimedia speakers are primarily soft dome types (such as titanium film domes for analog sources), which pair with digital sources to reduce the harshness of high-frequency signals, 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.

FERMAX electrical component applications

Wire and cable products used in power systems mainly include bare overhead wires, busbars (bus ducts), power cables (plastic-insulated cables, oil-impregnated paper-insulated power cables (largely replaced by plastic-insulated power cables), rubber-sheathed cables, overhead insulated cables), branch cables (replacing some busbars), magnet wires, and electrical equipment wiring for power devices. Wire and cable products used in information transmission systems mainly include telephone cables, TV cables, electronic wires, RF cables, fiber optic cables, data cables, magnet wires, power communication cables, and other composite cables. Apart from bare overhead wires, almost all other products in this category have applications, but the main ones are power cables, magnet wires, data cables, and instrument cables.

FERMAX electrical component principles

When two different conductors or semiconductors A and B form a loop with their ends connected, an electromotive force (EMF) is generated in the loop as long as the temperatures at the two junctions differ. One junction, at temperature T, is called the working end or hot end; the other, at temperature T0, is called the free end or cold end. The direction and magnitude of this EMF depend on the conductor materials and the temperatures of the two junctions. This phenomenon is called the "thermoelectric effect," the loop formed by the two conductors is called a "thermocouple," the conductors are called "thermoelectrodes," and the generated EMF is called "thermo-EMF." Thermo-EMF consists of two parts: the contact EMF between the two conductors and the thermal gradient EMF within a single conductor. The magnitude of the thermo-EMF in a thermocouple loop depends only on the conductor materials and the temperatures of the two junctions, not on the shape or dimensions of the thermocouple. Once the electrode materials are fixed, the thermo-EMF is a function of the difference between the junction temperatures t and t0. This relationship is widely used in practical temperature measurement. Since the cold end t0 is constant, the thermo-EMF generated by the thermocouple changes only with the temperature of the hot end (measurement end), meaning a specific thermo-EMF corresponds to a specific temperature. Temperature measurement is achieved by measuring the thermo-EMF. The basic principle of thermocouple temperature measurement is that a closed loop formed by two dissimilar homogeneous conductors generates a current when a temperature gradient exists between the ends, creating an EMF (thermo-EMF) between them, known as the Seebeck effect. The two dissimilar homogeneous conductors are the thermoelectrodes; the higher-temperature end is the working end, and the lower-temperature end is the free end, which is usually kept at a constant temperature. Thermocouple calibration tables are created based on the functional relationship between thermo-EMF and temperature; these tables are derived under the condition that the free end temperature is 2 °C, and different thermocouples have different calibration tables. When a third metal material is introduced into the thermocouple loop, the thermo-EMF remains unchanged as long as the temperatures at the two junctions of this material are identical, meaning it is unaffected by the insertion of the third metal. Therefore, during thermocouple temperature measurement, a measuring instrument can be connected; once the thermo-EMF is measured, the temperature of the measured medium can be determined. Thermocouple temperature measurement requires the cold end temperature (the end connected to the measurement circuit via lead wires, while the measurement end is the hot end) to remain constant so that the thermo-EMF is proportional to the measured temperature. If the cold end (ambient) temperature changes during measurement, it will seriously affect accuracy. Compensating for the impact of cold end temperature changes is called thermocouple cold junction compensation. Dedicated compensation wires are used to connect to the measuring instrument. Thermocouple cold junction compensation calculation methods: (1) From millivolts to temperature: Measure the cold end temperature, convert it to the corresponding millivolt value, add it to the thermocouple's millivolt reading, and convert the sum to temperature; (2) From temperature to millivolts: Measure the actual temperature and the cold end temperature, convert both to millivolt values separately, subtract them to obtain the net millivolt value, which corresponds to the temperature.

FERMAX electrical component characteristics

The static characteristics of a sensor refer to the relationship between the output and input quantities for static input signals. Since the input and output quantities are independent of time in this state, their relationship, i.e., the sensor's static characteristics, can be described by an algebraic equation without time variables, or by a characteristic curve plotted with the input quantity on the horizontal axis and the corresponding output quantity on the vertical axis. The main parameters characterizing sensor static characteristics include: linearity, sensitivity, hysteresis, repeatability, and drift. (1) Linearity: Refers to the degree to which the actual relationship curve between the sensor's output and input deviates from the fitted straight line. It is defined as the ratio of the maximum deviation between the actual characteristic curve and the fitted straight line over the full scale range to the full-scale output value. (2) Sensitivity: Sensitivity is an important indicator of a sensor's static characteristics. It is defined as the ratio of the increment in the output quantity to the corresponding increment in the input quantity that causes it. S is used to denote sensitivity. (3) Hysteresis: Hysteresis is the phenomenon where the input-output characteristic curves do not coincide when the input quantity changes from small to large (forward stroke) and from large to small (reverse stroke). For the same magnitude of input signal, the output signals for the forward and reverse strokes are unequal; this difference is called the hysteresis error. (4) Repeatability: Repeatability refers to the degree of inconsistency in the characteristic curves obtained when the sensor's input quantity undergoes multiple consecutive full-scale changes in the same direction. (5) Drift: Sensor drift refers to the change in the sensor's output quantity over time while the input quantity remains constant. There are two main causes of drift: one is the sensor's own structural parameters; the other is the surrounding environment (such as temperature, humidity, etc.). (6) Resolution: When the sensor's input increases slowly from a non-zero value, the input increment at which the output shows an observable change is called the sensor's resolution, i.e., the minimum input increment. (7) Threshold: When the sensor's input increases slowly from zero, the input value at which the output shows an observable change is called the sensor's threshold voltage.

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