Inductive High-Speed Rotor Position Sensor

Amphenol Piher's high-speed inductive position sensor is designed for hybrid/electric vehicles powertrain systems to feedback the angular position, direction, and speed of the rotor’s shaft to optimize control of the motor inverter.

The position sensor can be mounted on the same shaft as the electric machine rotor; sensing its position accurately is critical to drive the motor optimally by the vehicle’s control unit. This solution provides high-speed rotary motion sensing with a robust design against external magnetic interference fields generated from sources such as electric motors.

It uses the physical principles of induction in wire loop and eddy currents to detect the position of a solid metallic structure that is sliding or rotating above a set of coils consisting of one transmitter coil and two receiver coils. It is cost-effective as no magnet is needed. Metallic target can be milled into the end of a metallic shaft or be part of the customer’s application.

Custom product design packaging can be provided to meet any form, fit, and function, including the choice of wire harness and interface connector.

Features

• Standard pole numbers: 6, 8, and 12, with others available upon request
• AEC-Q100, Grade 0 automotive-qualified IC
• Wide operation temperature: -40°C to +150°C; coil temperature can be >150°C
• Supply voltage: 5 V ±10%
• Overvoltage and reverse-polarity protection: max. -18 V to +18 V
• Power or ground loss detection
• Stray field immunity, no shielding required
• ESD and short-circuit protection
• Speed up to 600K (electrical) RPM (differential sine and cosine output)
• Customized cable and connector interface
• Low-speed models are available featuring analog, PWM, or SENT output with 10 bit and 12 bit resolution full scale