JOVYATLAS electrical components Germany JOVYATLAS model JOVYATLAS price

JOVYATLAS electrical components are switches controlled by electromagnets, that is, a combination of an electromagnet and a switch. When the electromagnet coil is energized, it generates electromagnetic attraction, causing the movable iron core to push or pull the switch contacts to close, thereby connecting the controlled circuit. Electromagnetic switches are widely used in various industries, most commonly as contactors in the industrial sector. An electromagnetic switch is the control switch on a starter motor and is one of the three major components of a starter motor (DC motor, transmission engagement mechanism, electromagnetic switch). Its working principle is that when the coil is energized, it generates electromagnetic attraction, causing the movable iron core to move, thereby on one hand pulling the transmission engagement mechanism to move the starter pinion forward to engage with the engine flywheel ring gear, and on the other hand pushing the switch contacts to connect, enabling the DC motor to operate and thus driving the engine to start.

JOVYATLAS electrical component principle

The Hall voltage changes with the magnetic field strength; the stronger the magnetic field, the higher the voltage, and the weaker the magnetic field, the lower the voltage. The Hall voltage value is very small, typically only a few millivolts, but after amplification by an amplifier in an integrated circuit, the voltage can be amplified enough to output a stronger signal. To make the Hall integrated circuit function as a sensor, mechanical methods are required to change the magnetic field strength. A rotating impeller is used as a switch to control magnetic flux. When the impeller blades are in the air gap between the magnet and the Hall integrated circuit, the magnetic field deviates from the integrated chip, and the Hall voltage disappears. In this way, the change in the output voltage of the Hall integrated circuit can indicate a certain position of the impeller drive shaft. Using this working principle, the Hall integrated circuit chip can be used as an ignition timing sensor. Hall effect sensors belong to passive sensors; they require an external power supply to work. This characteristic enables them to detect low-speed operation conditions.

JOVYATLAS electrical component principle

The thermistor will remain in a non-tripped state for extended periods; when the ambient temperature and current are in the c region, the heat dissipation power of the thermistor is close to its heat generation power, so it may or may not trip. For a given ambient temperature, the tripping time of the thermistor decreases sharply as the current increases; at relatively higher ambient temperatures, the thermistor has a shorter tripping time and lower holding and tripping currents. The PTC effect refers to a material exhibiting the PTC effect, i.e., the positive temperature coefficient effect, meaning that the resistance of the material increases with rising temperature. For example, most metallic materials exhibit the PTC effect. In these materials, the PTC effect manifests as a linear increase in resistance with temperature, which is commonly referred to as the linear PTC effect. Nonlinear PTC effect: Materials undergoing a phase transition exhibit a phenomenon where resistance increases sharply by several to more than ten orders of magnitude over a narrow temperature range, known as the nonlinear PTC effect. Many types of conductive polymers exhibit this effect, such as polymer PTC thermistors. These conductive polymers are very useful for manufacturing overcurrent protection devices. Polymer PTC thermistors are used for overcurrent protection and are often referred to as resettable fuses (hereinafter referred to as thermistors). Due to their unique positive temperature coefficient resistance characteristics, they are highly suitable as overcurrent protection devices. The method of using a thermistor is similar to that of a conventional fuse: it is connected in series in the circuit. When the circuit operates normally, the thermistor's temperature is close to room temperature and its resistance is very low, so connecting it in series does not hinder current flow. However, when an overcurrent occurs due to a fault, the increased heat generation causes the thermistor's temperature to rise. When the temperature exceeds the switching temperature, the resistance increases dramatically, rapidly reducing the current in the circuit to a safe value. After the thermistor trips, the current in the circuit drops significantly; t is the tripping time of the thermistor. Due to the good design flexibility of polymer PTC thermistors, their temperature sensitivity can be adjusted by changing their switching temperature (ts), allowing them to provide both overtemperature and overcurrent protection. They are suitable for overcurrent and overtemperature protection of lithium-ion and nickel-metal hydride batteries. Influence of ambient temperature on polymer PTC thermistors: A polymer PTC thermistor is a directly heated, step-type thermistor. Its resistance change process is related to its own heat generation and dissipation conditions; therefore, its holding current, tripping current, and tripping time are influenced by ambient temperature.

JOVYATLAS electrical component applications

SMD inductors are electromagnetic induction components made by winding insulated wire. They belong to commonly used inductor components. Function of SMD inductors: Passing DC and blocking AC is a simple description; they isolate AC signals, filter them, or form resonant circuits with capacitors, resistors, etc. Tuning and frequency selection function of inductors: An inductor coil connected in parallel with a capacitor can form an LC tuning circuit. Any current in the circuit passing through an SMD inductor generates a magnetic field, and the magnetic flux of this field acts on the circuit. When the current passing through the SMD inductor changes, the DC voltage potential generated in the SMD inductor opposes the change in current. When the current passing through the inductor coil increases, the self-induced electromotive force generated by the inductor coil is opposite to the direction of the current, opposing the increase in current, while converting part of the electrical energy into magnetic energy stored in the inductor. When the current passing through the inductor coil decreases, the self-induced electromotive force is in the same direction as the current, opposing the decrease in current, while releasing stored energy to compensate for the decrease in current. Therefore, after inductive filtering, not only are the ripples of load current and voltage reduced and the waveform smoothed, but the conduction angle of the rectifier diode also increases. Inductor function 1: Color-ring inductors have a current-blocking effect. The copper core in the color-ring inductor coil always opposes changes in the current in the coil. Color-ring inductors impede AC current used in circuits; the magnitude of this impedance is called inductive reactance XL, measured in ohms. Its relationship with inductance L and AC frequency f is XL=2πfL. Color-ring inductors are mainly divided into high-frequency choke coils and low-frequency choke coils. Inductor function 2: Color-ring inductors have tuning and frequency selection functions. A color-ring inductor connected in parallel with an electrolytic capacitor can form an LC tuning circuit. At resonance, the inductive reactance and capacitive reactance of the circuit are equal in magnitude but opposite in direction. That is, when the natural oscillation frequency f0 of the circuit equals the frequency f of the non-AC signal, the inductive reactance and capacitive reactance of the loop are also equal. The usage frequency of color-ring inductors is generally not very high, and color-ring inductors used in circuits are generally quite stable. Inductor function 10: The main uses of color-ring inductors include signal screening, noise filtering, current stabilization, and suppression of electromagnetic interference. The basic function of a color-ring inductor is charging and discharging, but many circuit phenomena derived from this basic charging and discharging function give color-ring inductors various different applications. Today, color-ring inductors are widely used by customers, and the role played by these small inductors should not be underestimated.

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