ams has extended its 47 series of magnetic position sensors with the AS5047P, which offers an incremental ABI output to provide an ideal replacement for optical encoders and resolvers in motor and motion-control systems.
Like other members of the 47 series, the new AS5047P features ams’ Dynamic Angle Error Compensation (DAEC™) technology, which produces outstanding angle measurement accuracy even at very high rotation speeds.
The DAEC technology compensates for the dynamic angle error caused by 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 microcontroller.
At the maximum rated speed of 28krpm, the AS5047P achieves a maximum accuracy of ±0.34°, excluding integral non-linearity.
The 47 series’ ABI outputs are equivalent to the outputs of a standard optical encoder, so motor-control system designers can easily replace optical encoders, which are commonly used in high-speed motors, with an ams position-sensor measurement system without any change to their control software or interface.
In the AS5047P, the maximum resolution of the ABI output is 4,000 steps/1,000 pulses per revolution in decimal mode, and 4,096 steps/1,024 pulses per revolution in binary mode.
The device also simultaneously provides a standard UVW commutation interface for use in brushless DC motors, eliminating the need for discrete Hall sensor switches, and providing a single IC to support both motor-position and motor-control applications. Absolute angle position may be provided as a PWM-encoded output signal.
Like all magnetic position sensors from ams, the AS5047P offers high immunity to interference from stray magnetic fields, and is also unaffected by the dirt, dust, grease, humidity and other contaminants that commonly impair the performance of optical encoders.
- Motor-drive systems
- Motion control
- 14-bit core resolution
- 12-bit incremental pulse count
- Zero position programmable
- Independent output interfaces: SPI, ABI, UVW, PWM