Electromagnetic field shielding system for electric vehicle drive motor

Abstract

The electromagnetic field shielding system of the electric vehicle drive motor is inside the outer shielding body, the first connection point of the power line where the power line enters and exits the conduit, the power line and the first connection line of the second power surge protector are connected in parallel to the first connection point of the power line point; the first connection point of the signal line where the signal line enters and exits the conduit, the signal line and the signal line, the signal line of the control line protector, and the second wire of the control line protector are connected in series or in parallel at the first connection point of the signal line, The second connecting line of the first power surge protector on the first power surge protector is connected to the inner surface of the outer shield; the above accessories rely on the outer shield to form an electromagnetic field to prevent the motor from reaching the electromagnetic field on the outer shield. It is saturated and passes through the shield to form a new strong electromagnetic field, reaching the medical standard of magnetic field strength <0.2μT within 0.6 meters of the driving motor. The motor shielding system established based on this technology has laid a medical foundation for the popularization of electric vehicles.

Description

technical field [0001] The invention relates to an electric vehicle drive motor, in particular to an electromagnetic field shielding system for the electric vehicle drive motor capable of shielding the electromagnetic field generated by the electric vehicle drive motor so that the electric vehicle electromagnetic field strength is less than 0.4 μT. Background technique [0002] 1. Electromagnetic field strength and safety analysis of electric vehicle drive motor [0003] 1.1. The electromagnetic field radiation intensity of the driving motor of the electric vehicle is greater than 100 μT within 0.6 meters, causing the driver’s body to be in an electromagnetic environment of <100 μT for a long time, exceeding 250 times the medical standard of electromagnetic field exposure level <0.4 μT, seriously damaging human health. Huang Qingyun, Xie Weidong. Electromagnetic field intensity distribution and safety analysis of electric vehicle drive motor [J]. New Technology and Ne...

AI Technical Summary

Problems solved by technology

[0015] 3.6. True 10-mode (full mode) protection, blocking all possible channels of surge

[0019] The closed shielding body has the characteristics of simple structure, convenient manufacture and low cost. The common ultra-low frequency electromagnetic shielding device is composed of a single layer of high magnetic permeability alloy. The disadvantages are: 1. The shielding coefficient is low, generally between 20 and 30dB; 2. Cannot be compatible with the shielding of strong magnetic field and weak magnetic field at the same time; 3. The shielding layer is exposed to the outside, and it is easy to be impacted and collided, which will reduce the shielding effectiveness. When the high magnetic permeability alloy is impacted, the magnetic permeability will drop

Therefore, this single-layer ultra-low frequency electromagnetic shielding device is only suitable for places with low shielding requirements (the electromagnetic shielding coefficient is 20-30dB; the higher the electromagnetic shielding coefficient, the stricter the shielding requirements for equipment), and for shielding In places with high requirements (electromagnetic shielding coefficient is 75-90dB), even if the shielding body is thickened, the shielding effect cannot be achieved

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