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An electrical resistor known as a wirewound resistor has conductive wire wound around a non-conductive core. The resistor will behave like an inductor if the core is not an insulator.
Due to its construction technique, which is essentially identical to that of an inductor, wirewound resistors typically exhibit higher inductance than other types of resistors. The resistor’s usage of an insulating core is the main distinction.
Helix-wrapped wirewound resistors will still have a sizable amount of parasitic inductance, though. In high frequency applications, this inductance may have a noticeable impact.
By adopting particular wiring methods that eliminate the inductive magnetic field produced by the current flowing through the wires, the inductance can be adjusted.
Every conducting wire has some level of resistance, which is used to advantage by wirewound resistors. Making a wire longer or thinner will increase its resistance.
However, the wire thickness also relates to the power rating. It must be longer if we want a resistor with a high resistance and a high power or voltage rating. This implies that the resistor will be more expensive and greater in size.
The Global automotive wirewound resistor market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
The new hybrid wirewound charging resistor from Vishay Intertechnology is AEC-Q200 approved and reduces component counts and costs in EVs, HEVs, and PHEVs. For pre-charge and discharge applications, the device offers 10 times more energy absorption than competing component technologies of the same size.
High power ratings of up to 90 W on stainless steel and 54 W on Pamitherm are offered by the newly introduced equipment. The resistor has tolerances as low as 5%, TCR as low as 100 ppm/°C, and a resistance range of 1 W to 1 kW for great accuracy and stability.
The HRHA has a 6.35 mm faston connection, making mounting simple. The gadget has an optional inbuilt fuse and can be mounted atop a heatsink.