Noise suppression choke targets power steering

March 07, 2018 // By Christoph Hammerschmidt
The HA19 series common mode choke from TT Electronics is designed for use in electronic power steering (EPS) noise suppression applications. As required by the target market, the product is certified to the AECQ-200 standard for automotive passive electronic components

Every EPS system requires proper EMI (electromagnetic interference) control with a common mode choke (CMC) and/or a differential mode choke (DMC) serving this function.  With the growing shift to EVs and PHEVs, and the accelerated incorporation of electronic components in automobiles, noise suppression has become increasingly important in order to ensure EMI compliance.   TT Electronics ’ HA19 series common mode chokes are designed with the company’s expertise and excellence in noise suppression performance in chokes that the company has supplied for EPS applications over the last 15 years.

The HA19 series is comprised of three parts with standard inductance values, ranging from 11µH to 75µH, which have been demonstrated to be ideal for reducing line-conducted inference in the circuitry.  The devices offer high reliability and superior current handling from 26.5A to 44A in a rugged construction. Their wide -40 to 125°C operating temperature range and AEC-Q200 certification make them ideal for high stress automotive environments.  The HA19 common mode chokes are lead-free and comply with EU Directive 2011/65/EU (RoHS2) requirements.

The HA19 series is a proven solution to eliminate noise emission induced by high radiated frequencies and low conducted frequencies in system circuitry, enabling EPS system designers to improve EMI robustness, ensuring safe vehicle operation.


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