The following is an introduction to the rotational speed sensor and the starting relay:
Rotational Speed Sensor
• Working Principle: The magnetoelectric rotational speed sensor is based on the principle of electromagnetic induction. When a rotating component with gears rotates, the tooth tips and tooth grooves of the gears alternately pass by the induction coil, causing a periodic change in the magnetic field around the induction coil and generating an alternating electrical signal. The frequency of this electrical signal is proportional to the number of gear teeth and the rotational speed. The rotational speed is calculated by measuring the frequency of the electrical signal. The photoelectric rotational speed sensor, on the other hand, utilizes the principle of light reflection or occlusion. When the code disc rotates with the rotating shaft, the light emitted by the light source passes through the light-transmitting holes of the code disc or is reflected by the reflective......