Filtering circuit board of direct-current micromotor

Abstract

The utility model discloses a filtering circuit board of a direct current micromotor, which comprises a PCB (Printed Circuit Board), the positive input end V +, the negative input end V-, the positive output end Motor +, the negative output end Motor-, the first inductor H1, the second inductor H2, the first planar inductor L1, the second planar inductor L2, the third planar inductor L3, the fourth planar inductor L4, the capacitor C1, the capacitor C3, the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9, the capacitor C10, the capacitor C11, the capacitor C12, the capacitor C13, the capacitor C14, the capacitor C15 and the grounding point are arranged on the PCB. Differential-mode and common-mode electromagnetic interference is efficiently suppressed, so that the direct-current micromotor meets the requirement of CISPR25 five-level.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of circuit board, especially the technical field of direct current micro motor filter circuit board. BACKGROUND

[0002] The reasons of electromagnetic interference of direct current motor mainly have two points, one is commutator segment spark problem, two is the counter electromotive force transient phenomenon of preamplifier rectifier circuit, if carrying out EMC protection test, most direct current motors cannot pass the limit standard of EMC forced certification, at present, most in the industry adopt the filter device such as discrete capacitor, inductor and so on in the motor inside and outside, and the installation operation is complicated, this method can improve some filter performance although, but it is difficult to satisfy the requirement of CISPR25 five levels. SUMMARY

[0003] The utility model discloses the purpose of solving the problem in the prior art, propose direct current micro motor filter circuit board, can effectively promote filter performance, high -efficiently restrain differential mode and common mode electromagnetic interference, make direct current micro motor reach the requirement of CISPR25 five levels.

[0004] In order to achieve the above object, the utility model provides a direct current micromotor filter circuit board, including PCB board and setting on the PCB board positive input V +, negative input V -, positive output Motor +, negative output Motor -, first inductance H1, second inductance H2, first plane inductance L1, second plane inductance L2, third plane inductance L3, fourth plane inductance L4, capacitor C1, capacitor C3, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, capacitor C10, capacitor C11, capacitor C12, capacitor C13, capacitor C14, capacitor C15 and ground point, positive input V +, first plane inductance L1, first inductance H1, third plane inductance L3 and positive output Motor + are electrically connected in proper order, negative input V -, second plane inductance L2, second inductance H2, fourth plane inductance L4 and negative output Motor - are electrically connected in proper order, one end of capacitor C1 is connected on the circuit between first plane inductance L1 and positive input V +, and the other end of capacitor C1 is connected on the circuit between second plane inductance L2 and negative input V -, one end of capacitor C3 is connected on the circuit between third plane inductance L3 and positive output Motor +, and the other end of capacitor C3 is connected on the circuit between fourth plane inductance L4 and negative output Motor -.The one end of the capacitor C5 is connected to the circuit between the third planar inductor L3 and the positive output terminal Motor+, the other end of the capacitor C5 is connected to the circuit between the fourth planar inductor L4 and the negative output terminal Motor-, the one end of the capacitor C6 is connected to the circuit between the first planar inductor L1 and the positive input terminal V+, the other end of the capacitor C6 is connected to the ground, the one end of the capacitor C10 is connected to the circuit between the first planar inductor L1 and the positive input terminal V+, the other end of the capacitor C10 is connected to the ground, the one end of the capacitor C8 is connected to the circuit between the first planar inductor L1 and the first inductor H1, the other end of the capacitor C8 is connected to the ground, the one end of the capacitor C7 is connected to the circuit between the second planar inductor L2 and the negative input terminal V-, the other end of the capacitor C7 is connected to the ground, the one end of the capacitor C11 is connected to the circuit between the second planar inductor L2 and the negative input terminal V-, the other end of the capacitor C11 is connected to the ground, the one end of the capacitor C9 is connected to the circuit between the second planar inductor L2 and the second inductor H2, the other end of the capacitor C9 is connected to the ground, the one end of the capacitor C12 is connected to the circuit between the third planar inductor L3 and the positive output terminal Motor+, the other end of the capacitor C12 is connected to the ground, the one end of the capacitor C14 is connected to the circuit between the third planar inductor L3 and the positive output terminal Motor+, the other end of the capacitor C14 is connected to the ground, the one end of the capacitor C13 is connected to the circuit between the fourth planar inductor L4 and the negative output terminal Motor-, the other end of the capacitor C13 is connected to the ground, the one end of the capacitor C15 is connected to the circuit between the fourth planar inductor L4 and the negative output terminal Motor-, the other end of the capacitor C15 is connected to the ground.

[0005] As preferred, the first planar inductor L1 and the third planar inductor L3 are respectively located at the front and back positions of the first inductor H1 on the PCB board, the second planar inductor L2 and the fourth planar inductor L4 are respectively located at the front and back positions of the second inductor H2 on the PCB board, the ground has at least two, and the capacitor C8 and the capacitor C9 are located next to the ground on the PCB board.

[0006] As preferred, the first inductor H1 and the second inductor H2 are both 600Ω±20%100MHz, and the first planar inductor L1, the second planar inductor L2, the third planar inductor L3 and the fourth planar inductor L4 are all 1-3nH.

[0007] As preferred, the first planar inductor L1, the second planar inductor L2, the third planar inductor L3 and the fourth planar inductor L4 are all spiral copper foils arranged on the PCB board.

[0008] As preferred, the capacitances of the capacitors C6 and C7 are both 10 pF ± 20%, the capacitances of the capacitors C1 and C3 are both 3.3 nF ± 20%, the capacitances of the capacitors C8 and C9 are both 1 nF ± 20%, the capacitances of the capacitors C10 and C11 are both 4.7 nF ± 20%, the capacitances of the capacitors C12 and C13 are both 10 nF ± 20%, the capacitances of the capacitors C14 and C15 are both 100 nF ± 20%, and the capacitance of the capacitor C5 is 4.7 µF ± 20%.

[0009] The utility model discloses the beneficial effects: the utility model discloses a PCB board and the positive input end V+, negative input end V-, positive output end Motor+, negative output end Motor-, first inductance H1, second inductance H2, first plane inductance L1, second plane inductance L2, third plane inductance L3, fourth plane inductance L4, capacitor C1, capacitor C3, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, capacitor C10, capacitor C11, capacitor C12, capacitor C13, capacitor C14, capacitor C15 and ground point are combined together, and after the experiment optimization, can effectively promote the filter performance, and the high -efficient inhibition differential mode and common mode electromagnetic interference makes direct current micro motor reach CISPR25 five level's requirement.

[0010] The features and advantages of the utility model will be explained in detail by combining with the drawings through the embodiment. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the circuit structure schematic diagram of the utility model direct current micro motor filter circuit board;

[0012] Figure 2 It is the PCB board structure schematic diagram of the utility model direct current micro motor filter circuit board. DETAILED DESCRIPTION

[0013] Reference Figure 1 And Figure 2The utility model discloses direct current micro motor filter circuit board, including PCB board and setting on the PCB board positive input V+, negative input V-, positive output Motor+, negative output Motor-, first inductance H1, second inductance H2, first plane inductance L1, second plane inductance L2, third plane inductance L3, fourth plane inductance L4, capacitor C1, capacitor C3, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, capacitor C10, capacitor C11, capacitor C12, capacitor C13, capacitor C14, capacitor C15 and ground point, positive input V+, first plane inductance L1, first inductance H1, third plane inductance L3 and positive output Motor+ are electrically connected in proper order, negative input V-, second plane inductance L2, second inductance H2, fourth plane inductance L4 and negative output Motor- are electrically connected in proper order, one end of capacitor C1 is connected on the circuit between first plane inductance L1 and positive input V+, and the other end of capacitor C1 is connected on the circuit between second plane inductance L2 and negative input V-, one end of capacitor C3 is connected on the circuit between third plane inductance L3 and positive output Motor+, and the other end of capacitor C3 is connected on the circuit between fourth plane inductance L4 and negative output Motor-, one end of capacitor C5 is connected on the circuit between third plane inductance L3 and positive output Motor+, and the other end of capacitor C5 is connected on the circuit between fourth plane inductance L4 and negative output Motor-, one end of capacitor C6 is connected on the circuit between first plane inductance L1 and positive input V+, and the other end of capacitor C6 is connected ground point, one end of capacitor C10 is connected on the circuit between first plane inductance L1 and positive input V+, and the other end of capacitor C10 is connected ground point, one end of capacitor C8 is connected on the circuit between first plane inductance L1 and first inductance H1, and the other end of capacitor C8 is connected ground point, one end of capacitor C7 is connected on the circuit between second plane inductance L2 and negative input V-, and the other end of capacitor C7 is connected ground point, one end of capacitor C11 is connected on the circuit between second plane inductance L2 and negative input V-, and the other end of capacitor C11 is connected ground point, one end of capacitor C9 is connected on the circuit between second plane inductance L2 and second inductance H2, and the other end of capacitor C9 is connected ground point, one end of capacitor C12 is connected on the circuit between third plane inductance L3 and positive output Motor+, and the other end of capacitor C12 is connected ground point, one end of capacitor C14 is connected on the circuit between third plane inductance L3 and positive output Motor+, and the other end of capacitor C14 is connected ground point, one end of capacitor C13 is connected on the circuit between fourth plane inductance L4 and negative output Motor-, and the other end of capacitor C13 is connected ground point, one end of capacitor C15 is connected on the circuit between fourth plane inductance L4 and negative output Motor-, and the other end of capacitor C15 is connected ground point.

[0014] Preferably, the first planar inductor L1 and the third planar inductor L3 are respectively located at the front and back positions of the first inductor H1 on the PCB board; the second planar inductor L2 and the fourth planar inductor L4 are respectively located at the front and back positions of the second inductor H2 on the PCB board, and the grounding point has at least two, and the capacitor C8 and the capacitor C9 are located next to the grounding point on the PCB board.

[0015] Preferably, the first inductor H1 and the second inductor H2 are both 600Ω±20% 100MHz, and the first planar inductor L1, the second planar inductor L2, the third planar inductor L3 and the fourth planar inductor L4 are all 1-3nH.

[0016] Preferably, the first planar inductor L1, the second planar inductor L2, the third planar inductor L3 and the fourth planar inductor L4 are all spiral copper foils arranged on the PCB board.

[0017] Preferably, the capacitance of the capacitor C6 and the capacitor C7 is both 10pF±20%, the capacitance of the capacitor C1 and the capacitor C3 is both 3.3nF±20%, the capacitance of the capacitor C8 and the capacitor C9 is both 1nF±20%, the capacitance of the capacitor C10 and the capacitor C11 is both 4.7nF±20%, the capacitance of the capacitor C12 and the capacitor C13 is both 10nF±20%, the capacitance of the capacitor C14 and the capacitor C15 is both 100nF±20%, and the capacitance of the capacitor C5 is 4.7uF±20%.

[0018] The utility model discloses a PCB board and the positive input end V+, negative input end V-, positive output end Motor+, negative output end Motor-, first inductor H1, second inductor H2, first planar inductor L1, second planar inductor L2, third planar inductor L3, fourth planar inductor L4, capacitor C1, capacitor C3, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, capacitor C10, capacitor C11, capacitor C12, capacitor C13, capacitor C14, capacitor C15 and grounding point are combined together, and through the experiment optimization, can effectively promote the filter performance, and the high -efficient inhibition differential mode and common mode electromagnetic interference makes direct current micromotor reach CISPR25 five level's requirement.

[0019] The above embodiment is a description of the utility model, not a limitation of the utility model, and any simple transformation of the utility model belongs to the protection scope of the utility model.

Claims

1. A DC micromotor filter circuit board, characterized by: The PCB board and the positive input terminal V+, the first planar inductor L1, the first inductor H1, the third planar inductor L3 and the positive output terminal Motor+ are sequentially electrically connected; the negative input terminal V-, the second planar inductor L2, the second inductor H2, the fourth planar inductor L4 and the negative output terminal Motor- are sequentially electrically connected; one end of the capacitor C1 is connected to a circuit between the first planar inductor L1 and the positive input terminal V+, and the other end of the capacitor C1 is connected to a circuit between the second planar inductor L2 and the negative input terminal V-; one end of the capacitor C3 is connected to a circuit between the third planar inductor L3 and the positive output terminal Motor+, and the other end of the capacitor C3 is connected to a circuit between the fourth planar inductor L4 and the negative output terminal Motor-; one end of the capacitor C5 is connected to a circuit between the third planar inductor L3 and the positive output terminal Motor+, and the other end of the capacitor C5 is connected to a circuit between the fourth planar inductor L4 and the negative output terminal Motor-, one end of the capacitor C6 is connected to a circuit between the first planar inductor L1 and the positive input terminal V+, and the other end of the capacitor C6 is connected to the grounding point, one end of the capacitor C10 is connected to a circuit between the first planar inductor L1 and the positive input terminal V+, and the other end of the capacitor C10 is connected to the grounding point, one end of the capacitor C8 is connected to a circuit between the first planar inductor L1 and the first inductor H1, and the other end of the capacitor C8 is connected to the grounding point, one end of the capacitor C7 is connected to a circuit between the second planar inductor L2 and the negative input terminal V-, and the other end of the capacitor C7 is connected to the grounding point, one end of the capacitor C11 is connected to a circuit between the second planar inductor L2 and the negative input terminal V-, and the other end of the capacitor C11 is connected to the grounding point, one end of the capacitor C9 is connected to a circuit between the second planar inductor L2 and the second inductor H2, and the other end of the capacitor C9 is connected to the grounding point, one end of the capacitor C12 is connected to a circuit between the third planar inductor L3 and the positive output terminal Motor+, and the other end of the capacitor C12 is connected to the grounding point, one end of the capacitor C14 is connected to a circuit between the third planar inductor L3 and the positive output terminal Motor+, and the other end of the capacitor C14 is connected to the grounding point, one end of the capacitor C13 is connected to a circuit between the fourth planar inductor L4 and the negative output terminal Motor-, and the other end of the capacitor C13 is connected to the grounding point, one end of the capacitor C15 is connected to a circuit between the fourth planar inductor L4 and the negative output terminal Motor-, and the other end of the capacitor C15 is connected to the grounding point.

2. The direct current micromotor filter circuit board of claim 1, wherein: The first planar inductor L1 and the third planar inductor L3 are respectively located at the front and back positions of the first inductor H1 on the PCB board; the second planar inductor L2 and the fourth planar inductor L4 are respectively located at the front and back positions of the second inductor H2 on the PCB board, the grounding point has at least two, the capacitor C8 and the capacitor C9 are located next to the grounding point on the PCB board.

3. The direct current micromotor filter circuit board of claim 1, wherein: The first inductor H1 and the second inductor H2 are both 600Ω±20%100MHz, the first planar inductor L1, the second planar inductor L2, the third planar inductor L3 and the fourth planar inductor L4 are all 1-3nH.

4. The direct current micromotor filter circuit board of claim 1, wherein: The first planar inductor L1, the second planar inductor L2, the third planar inductor L3 and the fourth planar inductor L4 are all spiral copper foils arranged on the PCB board.

5. The direct current micromotor filter circuit board of claim 1, wherein: The capacitance of the capacitor C6 and the capacitor C7 is all 10pF±20%, the capacitance of the capacitor C1 and the capacitor C3 is all 3.3nF±20%, the capacitance of the capacitor C8 and the capacitor C9 is all 1nF±20%, the capacitance of the capacitor C10 and the capacitor C11 is all 4.7nF±20%, the capacitance of the capacitor C12 and the capacitor C13 is all 10nF±20%, the capacitance of the capacitor C14 and the capacitor C15 is all 100nF±20%, the capacitance of the capacitor C5 is 4.7μF±20%.

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