Windshield wiper motor EMC circuit and shielding method
A circuit and wiper technology, which is applied in the EMC circuit and shielding field of wiper motors, can solve problems such as poor electromagnetic compatibility, achieve the effects of improving electromagnetic compatibility, suppressing induced potential pulses and external interference, and eliminating induced potential
Pending Publication Date: 2021-08-31
上海中欧汽车电器有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the defects and problems of poor electromagnetic compatibility in the prior art, and provide a wiper motor EMC circuit and shielding scheme with good electromagnetic compatibility
Method used
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[0025] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0026] like figure 1 , figure 2 As shown, the main technical solution of the present application is to provide a wiper motor EMC circuit, which is convenient to improve the electromagnetic compatibility of the wiper motor, including a first contact piece 1, a second contact piece 2, a high-speed carbon brush 6, a low-speed carbon brush The brush 7, the third carbon brush 8, and the PTC thermal protector 11 are characterized in that:
[0027] The high-speed carbon brush 6 is conne...
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Abstract
The main technical solution of the invention is to provide a windshield wiper motor EMC circuit and a shielding method. The windshield wiper motor EMC circuit comprises a first contact piece, a second contact piece, a high-speed carbon brush, a low-speed carbon brush, a third carbon brush, a PTC thermosensitive protector, a worm-gear box and a cover plate, wherein the high-speed carbon brush is connected with a first inductor and a first capacitive circuit in series, the low-speed carbon brush is connected with a second inductor and a second capacitive circuit in series, and the third carbon brush is connected in series with the PTC thermosensitive protector; and the high-speed carbon brush is electrically connected with a first capacitor through the other end of the first inductor and then is grounded through a windshield wiper motor shell, the low-speed carbon brush is electrically connected with a second capacitor through the other end of the second inductor and then is grounded through the windshield wiper motor shell, a common end circuit is connected with the PTC thermosensitive protector through the other end of the third carbon brush to form a current loop, the worm-gear box and the cover plate form a shell, the metal shell isolates electromagnetic radiation generated by rotating contact of the contact pieces in the starting and stopping moments and the operation process of the motor, and the electromagnetic compatibility of a windshield wiper motor is improved.
Description
technical field [0001] The invention relates to the field of automobile wiper circuits, in particular to a wiper motor EMC circuit and a shielding method, which are mainly suitable for improving the electromagnetic compatibility of the wiper motor. Background technique [0002] With the continuous increase of automotive electrical equipment, the electromagnetic compatibility between various automotive electrical systems has also become a potential hazard that affects automotive safety and performance experience. At present, there are more sensors on the car, and inductive loads such as car wiper motors will generate transient voltages during work reversing or switching, which will interfere with the circuit. The surge and harmonics generated by the wiper motor may interfere with the electronic control module. Normal operation, causing logic errors in electronic devices or damage to sensing devices. As a reliability parameter of automotive electrical appliances, electromagne...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H02K11/02H02K11/026H02K11/25H02K11/40
CPCH02K11/026H02K11/25H02K11/40
Inventor 吴国琳朱亮
Owner 上海中欧汽车电器有限公司