AS5047 Magnetic Position Sensor

ams OSRAM has launched a new version of its 47 series of magnetic rotary position sensors for motor and motion control applications, featuring higher rotation speeds and higher-resolution incremental outputs. The new AS5047 features ams OSRAM's DAEC™ (dynamic angle error compensation) technology, which produces outstanding angle measurement accuracy even at very high rotation speeds. The 47 series magnetic sensors' high-speed performance and ABI incremental outputs make them ideal as robust replacements for optical encoders.

ams OSRAM has also increased the number of steps per revolution in the AS5047's incremental ABI outputs. The 47 series' ABI outputs are equivalent to the outputs of a standard optical encoder, so motor control system designers can easily replace an optical encoder with an ams OSRAM magnetic position sensor measurement system without any change to their control software or interface. In the AS5047, the maximum resolution of the ABI output is raised to 4,000 steps/1,000 pulses per revolution in decimal mode, and 4,096 steps/1,024 pulses per revolution in binary mode, which means that a wider range of optical encoders can now be replaced by a like-for-like magnetic position sensor.

The DAEC technology in the AS5047 provides compensation for the dynamic angle error caused by the propagation delay as the sensor processes raw measurements of magnetic field strength. DAEC thus eliminates the need for system designers to implement discrete error-correction circuitry in an external DSP or MCU. With DAEC, the AS5047P achieves very high accuracy, rated at a maximum 0.34° at a constant rotation speed of 28,000 RPM (excluding integral non-linearity). Unlike optical encoder solutions, the AS5047P position sensor provides lower system costs, immunity to harsh environments along with tolerance to axial and radial variations and an ultra-small footprint.