Inductive shock absorber is a device which realizes the function of shock absorption by using the principle of electromagnetic induction. It is mainly composed of coils, magnetic materials (such as permanent magnets) and elastic elements. When the shock absorber is shaken, the relative motion between the coil and the magnetic field generates an induced electromotive force, and the shock absorption process can be adjusted by the control circuit and external equipment.

Principles (Automotive applications)

Electromagnetic induction generates damping force: When the car is driving on an uneven road surface and the wheels vibrate up and down, the piston (with coil) in the inductive shock absorber moves relative to the cylinder block (with magnetic field). According to the law of electromagnetic induction, the coil cuts the magnetic inductance line in the magnetic field to generate the induced electromotive force. If the right circuit is connected, an induced current is generated. When this current passes through an external resistor or other energy-consuming element, it converts electrical energy into heat and is consumed. According to Lenz's law, the magnetic field generated by the induced current will block the change in magnetic flux that causes the induced current, that is, it will block the movement of the piston, resulting in a damping force.

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