AMS technology breaks through high precision measurement motor dynamics
As the global warming and climate warming problems intensify, energy issues have attracted global attention. According to statistics, 28% of the world's electricity consumption is used for motors, and 90% of them are non-regulated motors. Oliver Weber, senior marketing manager of Austrian Microelectronics, pointed out that if 30%-50% can be converted into a speed control motor, It will save 10% of electricity consumption, equivalent to 220 nuclear power plants.
To this end, austriamicrosystems' magnetic position sensors provide high-precision angular and linear position measurements at high rotational speeds, reducing energy consumption. According to Oliver Weber, position sensors are generally divided into contact and non-contact types. Among them, non-contact sensors such as optical and magnetic sensors have higher reliability, so the market is also larger. However, he also said that the optical is not able to provide absolute position and is afraid of dirt, so the reliability of the magnetic sensor is slightly better.
The magnetic sensor works by measuring a linear magnetic field through a magnet to detect motor motion, such as angle, speed, or direction of rotation, while Oliver Weber says the main advantage of its product is its ability to maintain stability in difficult environments. Reduce energy consumption, motor size and weight. At the same time, since it is a linear magnetic field, it is not interfered by other external magnetic fields.
In addition, austriamicrosystems today announced the launch of its new series of magnetic position sensors "47 Series". In addition to the above advantages, it has also added a new technology for DAEC dynamic angle error compensation. Measurement error caused by propagation delay. Oliver Weber pointed out that most smart sensors have this angular drop due to internal delay, and the error increases linearly with increasing speed. If the propagation speed is 100μs, the angular drop can reach as much as 18° at 15000 rpm. In the past, the compensation was usually achieved by using DSP and MCU with software, but only partial angle drop was reduced.
DAEC has a unique algorithm that completely eliminates this error and dynamically compensates for the speed at which each measurement sample is acquired. The error at 14500 rpm is only 0.17°. The 47 series includes AS5047D, AS5147, and AS5247. The AS5047D is mainly used in robotics, industrial automation, and home automation. The AS5147 and AS5247 are AEC-Q100 certified for automotive applications. The AS5247 is dual-chip overlap and provides the same magnetic field. Measured, so when one of the wafers fails, the other wafer can still run synchronously, suitable for automotive applications where safety is critical, such as the steering wheel.
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