Magnetic lock is also called electromagnetic lock. Its design is the same as that of electromagnet. It uses the principle of current to generate magnetism.

Factors of bridge rectifier damage Generally the heat sink is not large enough, the overload inrush current is too high and the heat is not dissipated. 1. Load short circuit, bad insulation. Caused by excessive load current. 2. Frequent starting and stopping of the power supply, if the inductive l

The principle and characteristics of infrared sensor switchInfrared sensor switchThe full name of infrared sensor switch is pyroelectric infrared sensor switch. Any object in nature, as long as the temperature is higher than absolute zero (-273°C), always emits infrared radiation continuously. The h

Common Bridge Rectifier Testing Methods 1. Test the rectifier circuit, find the p terminal and N terminal of the DC power supply inside the inverter, adjust the multimeter to resistance X10, connect the red pen to P and the black pen to R , S and T. The resistance value should be about a few tens of

What is a microwave sensor

The role of the vehicle loop detector in the parking lot system In the parking lot system, to determine the role of the loop detector, we must first know the location of the detector installation. The loop detector is generally installed in the following four positions: 1. At the entrance tick