fhf funke huster electrical components, German fhf funke huster models, fhf funke huster prices

fhf funke huster electrical components refer to electrical devices that disconnect the circuit by melting the fuse element with the heat generated when the current exceeds a specified value. A fuse is a current protection device made based on the principle that the fuse element melts due to its own heat after the current exceeds the specified value for a period of time, thereby disconnecting the circuit. Fuses are widely used in high- and low-voltage distribution systems, control systems, and electrical equipment as short-circuit and overcurrent protectors, making them one of the most commonly used protective devices. Using a metal conductor as the fuse element connected in series in the circuit, it is an electrical device that disconnects the circuit by melting due to self-heating when overload or short-circuit current passes through the fuse element. Fuses have a simple structure and are easy to use, and are widely used as protective devices in power systems, various electrical equipment, and household appliances.

fhf funke huster electrical component parameters

The main characteristic parameters of quartz crystal resonators include nominal frequency, adjustment tolerance, temperature tolerance, equivalent resistance, drive level, load capacitance, shunt capacitance, aging rate, and temperature range. (1) Nominal frequency is the specified resonant center frequency of the resonator under prescribed conditions. (2) Adjustment tolerance is the maximum deviation of the operating frequency from the nominal frequency at the reference temperature under prescribed conditions. (3) Temperature tolerance is the allowable deviation from the operating frequency at the reference temperature over the entire operating temperature range under prescribed conditions. (4) Reference temperature is the specified ambient temperature when measuring the parameters of a quartz crystal resonator. For oven-controlled quartz crystal resonators, it is generally the center point of the operating temperature range; (5) Load resonance resistance is the resistance value at the load resonance frequency when the quartz crystal resonator is connected in series with the specified external capacitance. (6) Drive level refers to the effective power consumed by the quartz crystal resonator during operation; it is a measure of the excitation state applied to the quartz crystal element. In actual use, the drive level can be adjusted; strong excitation makes it easier to start oscillation, while weak excitation leads to poor frequency stability or even failure to oscillate. (7) Load capacitance refers to the effective external capacitance that, together with the quartz crystal resonator, determines the load resonance frequency. Load capacitance can be appropriately adjusted according to specific conditions, and generally, the operating frequency of the resonator can be tuned to the nominal value through adjustment. (8) Shunt capacitance refers to the static capacitance between the two pins of the quartz crystal resonator. (9) Aging rate refers to the error caused by the aging change of the quartz crystal over time. (10) Temperature range refers to the allowable variation range of the ambient temperature during operation.

fhf funke huster electrical component classification

Standard power supplies can be subdivided into: switching power supplies, inverter power supplies, AC stabilized power supplies, DC stabilized power supplies, DC/DC power supplies, communication power supplies, module power supplies, variable frequency power supplies, UPS power supplies, EPS emergency power supplies, purified power supplies, PC power supplies, rectifier power supplies, custom power supplies, heating power supplies, welding power supplies/arc power supplies, electroplating power supplies, network power supplies, power operation power supplies, adapter power supplies, linear power supplies, power controllers/drivers, high-power supplies, other standard power supplies, parameter power supplies, voltage-regulating power supplies, transformer power supplies. Special power supplies can be subdivided into: shore power supplies, security power supplies, high-voltage power supplies, medical power supplies, military power supplies, aerospace power supplies, laser power supplies, other special power supplies.

fhf funke huster electrical component functions

The starter solenoid switch is a key component of the starter, and the design quality of the solenoid switch directly affects the reliability of the starter. The starter solenoid switch has two functions: one is to connect the main circuit to make the starter rotate, and the other is to push the drive gear out through the shift fork to engage with the engine flywheel ring gear. Therefore, the solenoid switch is required to have corresponding suction force, corresponding stroke, and contacts that can reliably connect and disconnect high currents. In addition, it is required to minimize volume and weight as much as possible. Based on the above characteristics, the contact structure of the solenoid switch generally adopts a contact form, that is, the moving contact is made into a bridge shape or a disk shape to provide a larger heat dissipation surface and thermal capacity. The magnetic system mostly adopts a solenoid electromagnet structure to meet the requirements of corresponding stroke, corresponding suction force, small volume, and light weight. The moving iron core of the solenoid switch can move smoothly in the brass bushing equipped with a solenoid coil. The moving iron core pull rod is connected to the one-way clutch through the shift fork. Under the action of the return spring, the moving iron core normally remains in the initial non-working position. During starting, the starter drive gear needs to move forward by approximately 12-22mm. Therefore, when the solenoid switch begins to close, a large magnetomotive force is required to generate the necessary initial suction force. After being pulled in, the air gap decreases, and the electromagnetic suction force increases sharply, greatly exceeding the force required to maintain the closed state. For this reason, the solenoid switch uses two coils (pull-in coil and hold-in coil). At the beginning, the pull-in coil and the hold-in coil jointly generate electromagnetic suction force. After the switch contacts close, the pull-in coil automatically disengages from the working state, and the hold-in coil alone maintains the switch in the closed state. The current of the hold-in coil is relatively small, and it can be wound with thinner wire. This not only reduces the volume of the solenoid switch but also achieves reasonable suction force matching. To ensure the reliability of the starter, it is necessary to focus on controlling the design quality of the solenoid switch.

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