Electromagnetic field shielding system for electric automobile driving motor
A technology for electric vehicles and shielding systems, applied to electric vehicles, motors, electric components, etc., can solve the problems of inability to provide electromagnetic pulse protection, grounding wires without power surge protectors, and reduced shielding effectiveness
Inactive Publication Date: 2016-07-27
岳秀兰
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Problems solved by technology
[0026] 6.1 Closed shielding body, which 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) Low shielding coefficient, generally In 20~30dB; (2) It is not compatible with the shielding of strong magnetic field and weak magnetic field at the same time; (3), the shielding layer is exposed, and it is easy to be impacted and collided, which will reduce the shielding effectiveness. When the high magnetic permeability alloy is impacted, 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
[0027] 6.2 Among the three main measures (shielding, grounding, and filtering) to prevent electromagnetic pulse, shielding is often used alone, but it cannot provide complete electromagnetic pulse protection, because the cable on the equipment or system is the most effective electromagnetic pulse receiving and transmitting antenna
[0028] 6.3 Existing single-layer or multi-layer electromagnetic shielding devices are not equipped with power surge protectors (SPDs), signal lines, and control line protectors ( SPD), without a power surge protector (SPD) installed in the ground conductor
Method used
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[0066] exist figure 1 The example shown and figure 1 , figure 2 , Figure 5 , Figure 7 , Figure 8 In the motor (8), an outer layer shield (2) made of conductive and magnetically conductive metal is installed on the outside of the motor (8), and the outer shield (2) is shielded by the upper cover plate (13) and the outer layer of the outer shield The lower body cover plate (19) is composed; the first bracket (21) is fixed on the outer surface of the outer shielding body (2) with the first bolt (20), and the second bracket (34) is fixed with the fourth bolt (35). ) is fixed on the outer surface of the outer shield (2); the first bracket (21) is fixed on the electric vehicle with the second bolt (22), and the second bracket (34) is fixed with the third bolt (33) On the electric vehicle; inside the outer shield (2): fix a first bracket (3) on the inner surface of the outer shield (1), fix a signal line and a control line protector (4) on the On the first bracket (3); fix ...
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An electromagnetic field shielding system for an electric automobile driving motor is disclosed, wherein a plurality of power source surge protectors and signal lines and a control line protector that are mounted between an external shielding body and the driving motor are used for absorbing and unloading electric currents, inducted by a motor electromagnetic field, on a power source line and the signal lines; the currents can be prevented from penetrating the shielding body and forming new strong electromagnetic fields, and therefore a medical standard of magnetic field intensity<0.4[mu]T within a range of 0.6 meter for the electric automobile driving motor can be met; via use of the electric automobile driving motor free of electromagnetic field radiation, a user can drive and ride an electric automobile for a long time in a driver seat which is positioned at a distance of less than 0.6 meters from the electric automobile driving motor. Via use of the electric automobile driving motor free of electromagnetic field radiation, electric automobiles can be greatly popularized and can be used for replacing conventional automobiles which consume gasoline and diesel oil as fuel, and therefore a problem of world environmental pollution can be completely solved.
Description
technical field [0001] The invention relates to an electromagnetic field shielding system for 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] 1.1 Electromagnetic field strength and safety analysis of electric vehicle drive motor: The electromagnetic field radiation intensity of the electric vehicle drive motor 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 the electromagnetic field exposure level <0.4μT is 250 times the medical standard, which seriously damages human health. (Huang Qingyun, Xie Weidong. Electromagnetic field strength distribution and safety analysis of electric vehicle drive ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H02K11/02
CPCH02K11/21H02K11/40H02K5/225H02K7/006H02K7/083H02K9/06B60L2220/14Y02T10/64H02K11/0141H02K5/203H02K11/00H02K5/20B60R16/03B60Y2400/60B60Y2410/114H02K7/14
Inventor 韩磊
Owner 岳秀兰