Second-generation resolver motor position sensor offers high speed operation

Melexis has a new second-generation resolver motor position sensor based upon its proprietary Triaxis Hall magnetic sensing technology. The new single IC solution MLX90380 is compatible with any brushless motor - including PMSM and BLDC - thanks to its ability to measure the absolute angle. It is ideally suited to the ever-growing number of automotive applications arising as a result of the greater electrification of vehicles. The precision sensor is suitable for high-speed rotating applications, such as automotive electrical power steering motors and superchargers, due to its 2µs sampling and 8µs output refresh rates. The MLX90380 provides Sine and Cosine analog ratiometric outputs while other options include the ability to select sensitivity from 10mT to 70mT and three different configurations for the magnetic field axis. The motor is unique in its ability to be mounted in either end-of-shaft or through-shaft applications. By simply selecting the correct option code, designers are now able to measure rotation and position at any point along a shaft by using a ring magnet in conjunction with the device. Commenting on the new device, Peter Vandersteegen, product manager said: "This second-generation Triaxis-based device represents a significant step forward, especially with regard to performance and mounting flexibility. As designers are challenged to work in small spaces in modern applications, especially automotive, this compact device offers many options allowing designers to deliver high-performance rotary measurement solutions."