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 by themselves when the current exceeds a specified value. A fuse is a current protection device made based on the principle that after the current exceeds the specified value for a period of time, the heat generated by itself melts the fuse element, 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, and are 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 appliance that breaks the circuit by melting due to its own heating when overload or short-circuit current passes through the fuse element. The fuse has a simple structure and is easy to use, and is widely used in power systems, various electrical equipment, and household appliances as a protective device.

fhf funke huster electrical component parameters

The main characteristic parameters of quartz crystal resonators include nominal frequency, adjustment frequency deviation, temperature frequency deviation, equivalent resistance, drive level, load capacitance, static capacitance, aging rate, and temperature range. (1) Nominal frequency is the specified resonant center frequency of the resonator under specified conditions. (2) Adjustment frequency deviation is the maximum deviation of the operating frequency from the nominal frequency at the reference temperature under specified conditions. (3) Temperature frequency deviation is the allowable deviation from the operating frequency at the reference temperature over the entire operating temperature range under specified conditions. (4) Reference temperature is the specified ambient temperature when measuring the parameters of the quartz crystal resonator. For oven-controlled quartz crystal resonators, it is generally the center point of the operating temperature range; (5) Load resonant resistance is the resistance value at the load resonant 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, which 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 easy to start oscillation, while too 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 resonant frequency. The load capacitance can be appropriately adjusted according to specific circumstances, and generally the operating frequency of the resonator can be adjusted to the nominal value by adjustment. (8) Static 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 range of change in the ambient temperature during operation.

fhf funke huster electrical component classification

Ordinary 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, purification power supplies, PC power supplies, rectifier power supplies, customized 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, power power supplies, other ordinary 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 out the drive gear through the 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 large 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 have a larger heat dissipation surface and heat 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 fork unidirectional device. Under the action of the return spring, the moving iron core usually remains in the initial non-working position. When starting, the starter drive gear needs to move forward by about 12-22mm. Therefore, when the solenoid switch starts to close, a large magnetomotive force is required to generate the necessary initial suction force. After being sucked, 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 (attraction coil and holding coil). At the beginning, the attraction coil and the holding coil jointly generate electromagnetic suction force. After the switch contacts are closed, the attraction coil automatically disengages from the working state, and the holding coil alone maintains the switch closed state. The holding coil current is relatively small, and can be wound with thinner wires, which can not only reduce the volume of the solenoid switch, but also achieve 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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