ams rotary position sensor for high speeds
The AS5132 magnetic rotary position sensor IC from ams is designed for high rotation speeds.
With a propagation delay of less than 22µs and advanced pre-commutation, the device is designed to give angle measurement even in motors rotating at speeds up to 80,000rpm. Angle measurements are accurate to within ±3° (maximum).
“BLDC motor manufacturers can achieve high and constant levels of torque even in high-speed applications over the whole dynamic range,” said the supplier.
The chip combines Hall elements, an analogue front end and digital signal processing. It can dynamically compensate for angle errors attributable to propagation delay, which are most noticeable at high speeds.
Error compensation is achieved through integrated pre-commutation functions. These can be configured in the AS5132 and do not require external software routines to be executed on host microcontrollers.
When paired with a simple two-pole magnet, the AS5132 provides absolute angle measurement at a resolution of 8.5 bits, or 360 positions per revolution. This measurement is available as a serial output and as a pulse width modulated (PWM) signal.
The AS5132 is suitable for contactless rotary position sensing, rotary switches (human machine interface), AC/DC motor position control and BLDC motor position control in automotive applications such as pump BLDC motors (stop-start system) and steering column BLDC motors.