Automotive power choke coil is using low-loss magnetic materials

December 22, 2020 //By Christoph Hammerschmidt
Automotive power choke coil is using low-loss magnetic materials
Panasonic has introduced a surface mounted automotive power choke coil suitable for circuits in electronic control units (ECUs) installed in vehicles with internal combustion engine. The product features low loss, high withstand voltage, and high vibration acceleration-resistant characteristics,

With emission regulations for cars with internal combustion engines becoming more stringent, it is increasingly necessary for such cars to efficiently burn fuel to achieve complete combustion as much as possible. Accordingly, the direct fuel injection method has been widely adopted to facilitate highly efficient fuel combustion. Complete combustion requires fuel to be atomized and finely injected. For that purpose, it is indispensable for the coil used to boost the voltage of the injector drive unit of a direct injection engine to have the low loss and high withstand voltage characteristics in order to shorten its boost voltage recovery time.

In addition, more automotive ECUs are being placed in the engine compartment, increasing the integration of mechanical and electronic in-vehicle components. Moreover, this trend has created a need for automotive ECUs that can be installed in high-temperature environments under more severe vibration conditions and support larger currents. Panasonic has independently developed low-loss magnetic materials with high withstand voltage to commercialize a surface-mounted automotive power choke coil that achieves the higher performance and downsizing of ECUs.

Panasonic claims that their new power chokes halves the electric losses and doubles withstand voltage performance compared to conventional products. Downsizing and the reduced number of coils required to be incorporated into ECUs due to the improved performance contribute to ECU space saving. In addition, the product eliminates the need for anti-vibration reinforcement as part of the mounting process, reducing the use of reinforcing measures with bonding agents (adhesives).

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