The device addresses the most pressing challenges for traction motor engineers, including vibration in start-up and running mode, high rotational speed, mechanical space limitations, high operating temperatures, and ISO 26262 safety requirements.
Features include:
• High-speed switching up to 40kHz (operating at 30,000 RPM)
• Advanced algorithms to suppress unwanted output pulses in startup and run modes
• Patented integrated magnetic package reduces design complexity and allows for smaller motors
• Operating temperature up to 160°C
• ASIL-B compliant (assessment pending)
Electric vehicles are becoming increasingly common as original equipment manufacturers (OEMs) must meet air quality, fuel efficiency, and vehicle safety standards. With the electric and hybrid vehicle market projected to explode in the coming years, the use of traction motors to meet these requirements presents new challenges for engineers designing electric motor control systems. The ATS17501 standard is at the forefront of addressing these challenges.
Addressing high rotational speeds with market-leading bandwidth,
the ATS17501 delivers high-speed switching up to 40 kHz, the highest in the industry. The device directly measures rotating ferrous gears up to 30,000 RPM and provides incremental encoded output with speed and direction information on a dual-channel interface.
It resolves traction motor vibration during start-up and operation.
The ATS17501 incorporates state-of-the-art digital signal processing for vibration robustness and is built on Allegro's SolidSpeed Digital Architecture™ to provide electric motor switching information. The ATS17501 also offers highly adaptable performance that functions through environmental and mechanical changes and disturbances.
"The digital architecture is flexible, intelligent, and provides high-resolution quadrature speed outputs with the parasitic field immunity provided by differential hall sensing architectures," says Karl Scheller, Design Director at Allegro Speed Sensors.
The fully integrated package overcomes space limitations.
The overmolded 4-pin SIP SG package fully integrates a magnet to optimize air gap performance and temperature. This integrated package provides the highest levels of reliability and predictability required for space-constrained traction motor applications.
Built to strict safety standards, it addresses emissions regulations.
Using an ISO 26262:2011 certified safety design process, the ATS17501 incorporates real-time diagnostics to achieve an ASIL-B (D) rating as an out-of-context safety item (assessment pending).
"Traction motors used in vehicles have great potential to meet air quality and fuel efficiency regulations and contribute to a healthier environment," explains Scheller. "Addressing these challenges aligns well with Allegro's vision of delivering greater sustainability through technology.".
