Military vehicle and civil vehicle dual-purpose electromagnetic compatibility motor

Abstract

The invention discloses a military vehicle and civil vehicle dual-purpose electromagnetic compatibility motor, which comprises a casing part, a rotor part, a reduction box body part, a gear part and a cover plate part, a main control circuit board is arranged in the casing part and at the position of a commutator of the rotor part, and a shielding cover is arranged on the cover plate part. An auxiliary filtering control circuit board is arranged on the cover plate component and in the shielding case, and the main control circuit board is electrically connected with the auxiliary filtering control circuit board. The main control circuit board and the auxiliary filtering control circuit board comprise a motor high-speed working circuit and a motor low-speed working circuit. According to the invention, civil frequency band conduction and radiation electromagnetic interference generated by the motor, part of military frequency band electromagnetic interference and the rest of military frequency band conduction electromagnetic interference can be filtered, and the rest of electromagnetic waves generated by the motor are prevented from external radiation interference through the metal shielding cover. Therefore, the working efficiency is improved, and the working stability is ensured.

Description

Technical Field

[0001] The invention relates to a motor, in particular to a motor used in a car. Background Art

[0002] With the development of various functions of automobiles, there are more and more automotive electronic components. Now a high-end passenger car or commercial vehicle can even have more than 1,000 electronic components. Therefore, the automobile is increasingly affected by electromagnetic interference, and the electromagnetic interference generated is also getting stronger. Since then, the electromagnetic compatibility (EMC) of automobiles has been regarded as a very important evaluation standard and a national mandatory inspection standard. And with the increasing demand for automobile electrification and intelligence, electromagnetic compatibility has become one of the key issues that cannot be avoided in automobile design and production.

[0003] At present, the electromagnetic compatibility (EMC) of existing wiper motors can only meet the standards for civilian vehicles or military vehicles, and cannot meet the electromagnetic interference requirements of both military and civilian vehicles. Car wipers are an indispensable part of cars, used to remove dust, leaves and sediment on the windshield. Usually, car wipers are composed of multiple sub-components, including wiper motors, linkage mechanisms and wiper arms. In order to meet the electromagnetic compatibility requirements, the wiper motor adds inductors and capacitors to its main control circuit board, which can only meet the electromagnetic compatibility (EMC) requirements of civilian vehicles or military vehicles, but cannot meet the electromagnetic compatibility (EMC) requirements of both military and civilian vehicles. Summary of the invention

[0004] The purpose of the present invention is to solve the deficiencies in the prior art and to provide an electromagnetic compatible motor for both military and civilian vehicles that can filter electromagnetic interference from military and civilian vehicles and work stably.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an electromagnetic compatible motor for military and civilian vehicles, including a casing component, a rotor component, a reduction gear box component, a gear component, and a cover component. A main control circuit board is installed in the casing component and at the commutator position of the rotor component, a shielding cover is installed on the cover component, and an auxiliary filter control circuit board is installed on the cover component and in the shielding cover. The main control circuit board is electrically connected to the auxiliary filter control circuit board.

[0006] The main control circuit board and the auxiliary filter control circuit board include a motor high-speed working circuit and a motor low-speed working circuit. The motor high-speed working circuit includes a ninth inductor connected to the positive pole of the high-speed power supply, the ninth inductor is sequentially connected in series with the eighth inductor, the seventh inductor, the second inductor, the second brush, the rotor armature, the third brush, the third inductor, and the thermal protector, the thermal protector is sequentially connected in series with the fourth inductor, the fifth inductor, and the sixth inductor, and the sixth inductor is connected to the negative pole of the power supply; between the second inductor and the seventh inductor, and between the thermal protector and the fourth inductor, two paths are divided and respectively connected in parallel with the second resistor and the second capacitor, between the fourth inductor and the fifth inductor, and between the seventh inductor and the eighth inductor, both are connected in parallel with the fourth capacitor, and between the fifth inductor and the sixth inductor, and between the eighth inductor and the ninth inductor, two paths are divided and respectively connected in parallel with the sixth capacitor and the third resistor. The low-speed working circuit of the motor includes a twelfth inductor connected to the positive electrode of the low-speed power supply, the twelfth inductor is connected in series with the eleventh inductor, the tenth inductor, the first inductor, the first brush, the rotor armature, the third brush, the third inductor, and the thermal protector in sequence, the thermal protector is connected in series with the fourth inductor, the fifth inductor, and the sixth inductor in sequence, and the sixth inductor is connected to the negative electrode of the power supply; between the first inductor and the tenth inductor and between the thermal protector and the fourth inductor, two paths are respectively connected in parallel with the first resistor and the first capacitor, between the fourth inductor and the fifth inductor and between the tenth inductor and the eleventh inductor, both are connected in parallel with the third capacitor, and between the fifth inductor and the sixth inductor and between the eleventh inductor and the twelfth inductor, two paths are respectively connected in parallel with the fifth capacitor and the fourth resistor.

[0007] The main control circuit board and the auxiliary filter control circuit board also include a motor reset working circuit, which realizes the motor reset work by connecting the automobile relay, turning on the second switch connected to the positive pole of the reset power supply, and using the motor low-speed working circuit. The fourth inductor and the fifth inductor, the seventh inductor and the eighth inductor, the tenth inductor and the eleventh inductor are all common-mode inductors, and the first inductor, the second inductor, the third inductor, the sixth inductor, the ninth inductor, and the twelfth inductor are all differential-mode inductors.

[0008] After adopting the structure of the present invention, a main control circuit board (main board) is arranged inside the motor, and a sub-filter control circuit board (sub-board) is arranged outside the reduction box body component and inside the cover component, and a metal shielding cover is added outside the sub-filter control circuit board. Add filter electrical components such as inductance, resistance, and capacitance on the main board to filter out the conducted and radiated electromagnetic interference of the civil frequency band generated by the motor when working, as well as the electromagnetic interference of part of the military frequency band. Through the differential mode, common mode inductance, varistor and capacitor components on the sub-filter control circuit board, the electromagnetic interference generated by the conduction of the remaining military frequency band is filtered, and the metal shielding cover is used to prevent the motor from generating the remaining electromagnetic waves to interfere with the external auxiliary radiation. Thereby, the work efficiency is improved and the work stability is guaranteed. Through the separate design of the main board and the sub-board, the requirements of different use environments are met. The modular design of the circuit can be combined according to different use environments. If the product is only used for civilian vehicles, the sub-filter control circuit board and the shielding cover can be used without assembly, which can minimize the production cost of the product. At the same time, since the military vehicles use the existing mass-produced parts used in civilian vehicles, the production and cost of military products are greatly optimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the electromagnetic compatible motor for military and civilian vehicles of the present invention.

[0010] Figure 2 This is a current working principle diagram of the motor high-speed working circuit of the present invention.

[0011] Figure 3 This is a current working principle diagram of the motor low-speed working circuit of the present invention.

[0012] Figure 4 This is a current working principle diagram of the motor reset working circuit of the present invention. DETAILED DESCRIPTION

[0013] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] Reference Figure 1It can be known that the electromagnetic compatible motor for military and civilian vehicles of the present invention comprises a housing component 1, a rotor component 2 (including a rotor armature M, a worm 27, a commutator 29, and a plurality of brushes), a reduction box component 4, a gear component 5 (including a gear shaft 28), and a cover component 6. A main control circuit board 3 is installed in the housing component 1 and at the position of the commutator 29 of the rotor component 2. A shielding cover 8 is installed on the cover component 6 (through a locking screw 26). A secondary filter control circuit board 7 is installed on the cover component 6 and in the shielding cover 8. The main control circuit board 3 is electrically connected to the secondary filter control circuit board 7. The plurality of brushes are composed of a first brush D1, a second brush D2, a third brush D3, etc. The main control circuit board 3 and the secondary filter control circuit board 7 include a motor high-speed working circuit and a motor low-speed working circuit.

[0015] like Figure 2 As shown, the high-speed working circuit of the motor includes a ninth inductor L9 connected to the positive electrode of the high-speed power supply, the ninth inductor L9 is sequentially connected in series with the eighth inductor L8, the seventh inductor L7, the second inductor L2, the second brush D2, the rotor armature M, the third brush D3, the third inductor L3, and the thermal protector FR, the thermal protector FR is then sequentially connected in series with the fourth inductor L4, the fifth inductor L5, and the sixth inductor L6, the sixth inductor L6 is connected to the negative electrode of the power supply; between the second inductor L2 and the seventh inductor L7, between the thermal protector FR and the fourth inductor L4, two paths are divided and respectively connected in parallel with the second resistor R2 and the second capacitor C2, between the fourth inductor L4 and the fifth inductor L5, between the seventh inductor L7 and the eighth inductor L8, they are all connected in parallel with the fourth capacitor C4, between the fifth inductor L5 and the sixth inductor L6, between the eighth inductor L8 and the ninth inductor L9, two paths are divided and respectively connected in parallel with the sixth capacitor C6 and the third resistor R3. The first switch K1 between the thermal protector FR and the fourth inductor L4 and connected to the rotor armature M is in the on state (the second switch K2 is off). The current of the motor high-speed working circuit flows from the positive electrode of the high-speed power supply, the ninth inductor L9, the eighth inductor L8, the seventh inductor L7, the second inductor L2, the second brush, the rotor armature M, the third brush D3, the third inductor L3, the thermal protector FR, the fourth inductor L4, the fifth inductor L5, and the sixth inductor L6 to the negative electrode of the power supply.

[0016] like Figure 3As shown, the motor low-speed working circuit includes a twelfth inductor L12 connected to the positive electrode of the low-speed power supply, the twelfth inductor L12 is sequentially connected in series with the eleventh inductor L11, the tenth inductor L10, the first inductor L1, the first brush D1, the rotor armature M, the third brush D3, the third inductor L3, and the thermal protector FR, the thermal protector FR is sequentially connected in series with the fourth inductor L4, the fifth inductor L5, and the sixth inductor L6, the sixth inductor L6 is connected to the negative electrode of the power supply; in the first inductor L11, the tenth inductor L10, the first inductor L1, the first brush D1, the rotor armature M, the third brush D3, the third inductor L3, and the thermal protector FR, the thermal protector FR is sequentially connected in series with the fourth inductor L4, the fifth inductor L5, and the sixth inductor L6, the sixth inductor L6 is connected to the negative electrode of the power supply; The first switch K1 between the thermal protector FR and the fourth inductor L4 and connected to the rotor armature M is in an on state (the second switch K2 is off). The current of the motor's low-speed working circuit flows from the positive electrode of the low-speed power supply, the twelfth inductor L12, the eleventh inductor L11, the tenth inductor L10, the first inductor L1, the first brush D1, the rotor armature M, the third brush D3, the third inductor L3, the thermal protector FR, the fourth inductor L4, the fifth inductor L5, and the sixth inductor L6 to the negative electrode of the power supply.

[0017] like Figure 4 As shown, the main control circuit board 3 and the auxiliary filter control circuit board 7 also include a motor reset working circuit, which realizes the motor reset work by connecting the automobile relay, turning on the second switch K2 connected to the positive pole of the reset power supply (the first switch K1 is disconnected), and borrowing the motor low-speed working circuit. The current of the motor reset working circuit flows from the positive pole of the reset power supply, the second switch K2, the automobile relay, the twelfth inductor L12, the eleventh inductor L11, the tenth inductor L10, the first inductor L1, the first brush D1, the rotor armature M, the third brush D3, the third inductor L3, the thermal protector FR, the fourth inductor L4, the fifth inductor L5, and the sixth inductor L6 to the negative pole of the power supply. The rotor armature M, the third brush D3, the third inductor L3, the thermal protector FR, the fourth inductor L4, the fifth inductor L5, the sixth inductor L6, and the negative pole of the power supply are common to the motor high-speed working circuit, the motor low-speed working circuit, and the motor reset working circuit.

[0018] The fourth inductor L4 and the fifth inductor L5, the seventh inductor L7 and the eighth inductor L8, the tenth inductor L10 and the eleventh inductor L11 are all common mode inductors, and the first inductor L1, the second inductor L2, the third inductor L3, the sixth inductor L6, the ninth inductor L9, and the twelfth inductor L12 are all differential mode inductors. The first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 are all varistors. Common mode inductors refer to inductors used to filter out common mode signals in a circuit. Common mode interference refers to interference signals that affect two signals in a circuit at the same time. This interference usually comes from the external environment or other circuits. Common mode inductors generally wind two coils on the same magnetic core, and the two input signals of the circuit are introduced through the two coils respectively. Common mode inductors have four pins, and the coil diameters and number of turns of the two windings are the same, but the winding directions are opposite. Differential mode inductors are inductors used to filter out differential mode signals. Differential mode interference refers to the interference signals of opposite directions and equal magnitudes that exist on two signal lines at the same time. Differential mode inductors are two coils wound on different magnetic cores. The two input signals of the circuit are introduced separately through these two coils. Differential mode inductors have two pins.

[0019] The fourth inductor L4, the fifth inductor L5 and the sixth inductor L6, the seventh inductor L7, the eighth inductor L8 and the ninth inductor L9, the tenth inductor L10, the eleventh inductor L11 and the twelfth inductor L12, the fifth capacitor C5, the fourth resistor R4, the third capacitor C3, the fourth capacitor C4, the sixth capacitor C6, the third resistor R3 all belong to the auxiliary filter control circuit board 7, the second resistor R2, the second capacitor C2, the first resistor R1, the first capacitor C1, the first inductor L1, the first brush D1, the second inductor L2, the second brush D2, the rotor armature M, the third brush D3, the third inductor L3, the thermal protector FR all belong to the main control circuit board 3. The present invention is also applicable to various motors such as wiper motors, glass lifter motors, seat motors, sunroof motors, etc. on automobiles.

[0020] When the rotor component 2 of the present invention is working, the rotation torque is transmitted to the gear component 5, and is transmitted to the wiper linkage mechanism through the gear shaft 28 connected to the gear component 5. The ultra-low frequency band and ultra-high frequency band filtered by the above-mentioned circuits, that is, the interference frequency band of civilian vehicles and military vehicles, are filtered through multiple common mode inductors, differential mode inductors, multiple capacitors, varistors and other components. Most of the radiation signal interference of military vehicles is shielded by the combination of the reduction box component 4, the cover component 7, and the shielding cover 8.

Claims

1. An electromagnetic compatible motor for military and civilian vehicles, including a housing component, a rotor component, a reduction box component, a gear component, and a cover component, characterized in that: A main control circuit board is installed in the casing component and at the commutator position of the rotor component, a shielding cover is installed on the cover component, and an auxiliary filter control circuit board is installed on the cover component and in the shielding cover. The main control circuit board is electrically connected to the auxiliary filter control circuit board.

2. The electromagnetic compatible motor for military and civilian vehicles as claimed in claim 1, characterized in that: The main control circuit board and the auxiliary filter control circuit board include a motor high-speed working circuit and a motor low-speed working circuit.

3. The electromagnetic compatible motor for military and civilian vehicles as claimed in claim 2, characterized in that: The high-speed working circuit of the motor includes a ninth inductor connected to the positive electrode of the high-speed power supply, the ninth inductor is connected in series with the eighth inductor, the seventh inductor, the second inductor, the second brush, the rotor armature, the third brush, the third inductor, and the thermal protector in sequence, the thermal protector is connected in series with the fourth inductor, the fifth inductor, and the sixth inductor in sequence, and the sixth inductor is connected to the negative electrode of the power supply; between the second inductor and the seventh inductor and between the thermal protector and the fourth inductor, two paths are divided and respectively connected in parallel with the second resistor and the second capacitor, between the fourth inductor and the fifth inductor and between the seventh inductor and the eighth inductor, both are connected in parallel with the fourth capacitor, and between the fifth inductor and the sixth inductor and between the eighth inductor and the ninth inductor, two paths are divided and respectively connected in parallel with the sixth capacitor and the third resistor.

4. The electromagnetic compatible motor for military and civilian vehicles as claimed in claim 3, characterized in that: The low-speed working circuit of the motor includes a twelfth inductor connected to the positive electrode of the low-speed power supply, the twelfth inductor is connected in series with the eleventh inductor, the tenth inductor, the first inductor, the first brush, the rotor armature, the third brush, the third inductor, and the thermal protector in sequence, the thermal protector is connected in series with the fourth inductor, the fifth inductor, and the sixth inductor in sequence, and the sixth inductor is connected to the negative electrode of the power supply; between the first inductor and the tenth inductor and between the thermal protector and the fourth inductor, two paths are respectively connected in parallel with the first resistor and the first capacitor, between the fourth inductor and the fifth inductor and between the tenth inductor and the eleventh inductor, both are connected in parallel with the third capacitor, and between the fifth inductor and the sixth inductor and between the eleventh inductor and the twelfth inductor, two paths are respectively connected in parallel with the fifth capacitor and the fourth resistor.

5. The electromagnetic compatible motor for military and civilian vehicles as claimed in claim 2 or 4, characterized in that: The main control circuit board and the auxiliary filter control circuit board also include a motor reset working circuit, which realizes the motor reset work by connecting the automobile relay, turning on the second switch connected to the positive pole of the reset power supply, and using the motor low-speed working circuit.

6. The electromagnetic compatible motor for military and civilian vehicles as claimed in claim 4, characterized in that: The fourth inductor and the fifth inductor, the seventh inductor and the eighth inductor, the tenth inductor and the eleventh inductor are all common mode inductors, and the first inductor, the second inductor, the third inductor, the sixth inductor, the ninth inductor and the twelfth inductor are all differential mode inductors.

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