ams AG (Raleigh, NC) has introduced the 47 Series magnetic position sensors featuring a technology capable of producing accurate angle measurements of rotors spinning at high speed. The sensors feature DAEC™ (Dynamic Angle Error Compensation), a patent-pending technology that eliminates the measurement error attributable to propagation delay. The series is suited to all motor control and angle measurement applications. In high-speed brushless DC (BLDC) motors and permanent magnet synchronous motors (PMSM), the sensor’s accuracy enables better execution of the commutation scheme.

The devices provide absolute position measurements as a digital PWM output, and UVW outputs for use in field-oriented commutation schemes. They also provide an incremental ABI output equivalent to the output of an optical encoder. This means an AS5047D IC can replace an optical encoder without requiring the user to change the software interface in the host system’s microcontroller or DSP.

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Motion Control & Automation Technology Magazine

This article first appeared in the August, 2014 issue of Motion Control & Automation Technology Magazine.

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