Solution
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FAQ
Hall sensors, many people may not recognize them, but the field of application is very wide, especially in the automotive applications.
Measurement method for automotive Hall sensors: 1. Change the size of the magnetic field to measure the quality of the linear Hall element. The linear Hall element is energized, and the output terminal is connected to the voltmeter. The magnet gradually changes from far to near. When approaching the linear Hall element, the output voltage of the linear Hall element gradually changes from small to large, indicating that the linear Hall element is good; If the output voltage remains unchanged, it indicates that the linear Hall element is damaged. 2. Change the current of the constant current source of the linear Hall element and determine that the magnet of the linear Hall element remains stationary. Therefore, the linear Hall element is constant. When the current source gradually changes from zero to the rated current, the output voltage of the linear Hall element will also gradually change from small to large. In this case, linear Hall elements are good; If the voltage remains constant, it indicates that the linear Hall element is damaged. How to measure a car Hall sensor 1. Test the quality of a single pole switch Hall element. The single pole switch Hall element is powered by 5V and the output terminal is connected in series with a resistor. When the magnet is away from the switch Hall element, the output voltage of the switch Hall element Hall element is high (+5V). When the magnet approaches the switch hole element, the output voltage of the switch Hall element is low (+0.2V), indicating that it is good to turn on the Hall element. If the output level remains unchanged, it indicates that the Hall switch is damaged. 2. Detect the quality of bipolar latch Hall switch components. When the N or S poles of the magnet are close to the Hall switch, the output is either high or low. Then, remove the Hall component, keep the level unchanged, and use the opposite magnetic pole to obtain the opposite level. At this point, this means that the Hall element is good. If the magnet does not latch after leaving, it indicates a poor Hall effect. When the magnet approaches Hall with opposite polarity and cannot obtain a level opposite to the other polarity approaching Hall, it also indicates that the Hall switch has been damaged. Due to the fact that Hall sensors are very precise components, the winding of their coils is crucial. If not properly wound, it may not meet the requirements and may cause a series of measurement problems. This requires a specialized winding machine, mainly designed for the winding of Hall sensors in new energy vehicles. It can achieve inclined slot stator, distributed, and centralized winding, with a winding slot range of 0.5-0.8mm, simple operation, and high stability, It is an indispensable wiring device for car Hall sensors!
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