CN208299681U - A kind of filter circuit, electric machine controller and automobile - Google Patents
A kind of filter circuit, electric machine controller and automobile Download PDFInfo
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- CN208299681U CN208299681U CN201820410982.5U CN201820410982U CN208299681U CN 208299681 U CN208299681 U CN 208299681U CN 201820410982 U CN201820410982 U CN 201820410982U CN 208299681 U CN208299681 U CN 208299681U
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Abstract
The utility model provides a kind of filter circuit, electric machine controller and automobile, is applied to automobile technical field.Wherein, which includes: a filter circuit, and the input terminal of the filter circuit is connect with the power input of the electric machine controller, and the output end of the filter circuit is connect with the driving power in the electric machine controller.In above-mentioned technical proposal, the filter circuit in electric machine controller is two stage filter circuit, can filter out the electromagnetic interference of different frequency scope step by step.And it is provided with the electric machine controller of the filter circuit, under the action of the filter circuit, both the electromagnetic interference that electric machine controller can have been inhibited to generate, reduce the influence caused by other electrical equipments of these electromagnetic interferences, the electromagnetic interference that other electrical equipments can be inhibited to generate again, to the influence that electric machine controller generates, the Electro Magnetic Compatibility of electric machine controller is improved.
Description
Technical field
The utility model relates to automobile technical field more particularly to a kind of filter circuits, electric machine controller and automobile.
Background technique
In the car, generally 12V DC power supply is used to be powered for the electrified equipment on automobile, while can also led to
Crossing dedicated interface is that the electrical equipment outside vehicle body is powered, such as mobile phone, tablet computer, practicability are stronger.Due to automobile
On many electrified equipment be all to be powered by 12V DC power supply, accordingly, there exist multiple electrified equipment to share 12V
The problem of DC power supply, the interference that such a electrification equipment itself generates, it is possible to be coupled to by 12V DC power supply
In other electrified equipment, interference is generated to other electrified equipment.Such as, the driving plate in electric machine controller, driving power etc.
Current changing rate di/dt, the interference of voltage change ratio dv/dt bring when power device high-speed switch, can pass through 12V DC electricity
Vehicle-mounted radio is coupled in source, generates interference to vehicle-mounted radio, influences the performance of vehicle-mounted radio.
Utility model content
The utility model embodiment provides a kind of filter circuit, electric machine controller and automobile, to solve in the prior art
Since the interference and coupling of electric machine controller generation is to other electrical equipments, to lead to the problem of interference to other electrical equipments.
In order to solve the above-mentioned technical problem, the utility model adopts the following technical solution:
According to the one aspect of the utility model embodiment, a kind of filter circuit is provided, comprising:
First order filter circuit；
The second level filter circuit being connect with the first order filter circuit；
Wherein, the first order filter circuit filters out the electromagnetic interference of first frequency range, the second level filter circuit
The electromagnetic interference of second frequency range is filtered out, the maximum value within the scope of the first frequency is less than the second frequency range most
Small value.
Further, the first order filter circuit includes:
First capacitor, the first end of the first capacitor are connect with the electrode input end of the filter circuit, and described first
The second end of capacitor is connect with the negative input of the filter circuit；
The first end of second capacitor, second capacitor is connect with the first end of the first capacitor；
Third capacitor, the first end of the third capacitor are connect with the second end of second capacitor, the third capacitor
Second end connect with the second end of the first capacitor；
First inductance, the first end of first inductance are connect with the first end of second capacitor；
Second inductance, the first end of second inductance are connect with the second end of the third capacitor；
The first end of 4th capacitor, the 4th capacitor is connect with the second end of first inductance, the 4th capacitor
Second end connect with the second end of second inductance；The first end and second end of 4th capacitor is also respectively with described
Secondary filter circuit connection；
Wherein, second capacitor and the third capacity earth.
Further, first inductance and second inductance are the identical differential mode inductance of inductance value.
Further, the first capacitor and the 4th capacitor are differential mode capacitor；Second capacitor and the third
Capacitor is common mode capacitance.
Further, the first order filter circuit further include:
First resistor, the first end of the first resistor are connect with the first end of the third capacitor, the first resistor
Second end connect with the second end of the third capacitor；
Wherein, the first resistor ground connection.
Further, the second level filter circuit includes:
The 5th capacitor and the 6th capacitor being connect respectively with the first order filter circuit, the second end of the 5th capacitor
It is connect with the first end of the 6th capacitor；
Third inductance, the first end of the third inductance are connect with the first end of the 5th capacitor, the third inductance
Second end connect with the second end of the 6th capacitor；
The first end of 7th capacitor, the 7th capacitor is connect with the third end of the third inductance；7th capacitor
First end also connect with the cathode output end of the filter circuit；
The first end of 8th capacitor, the 8th capacitor is connect with the second end of the 7th capacitor, the 8th capacitor
Second end connect with the 4th end of the third inductance；Cathode of the second end of 8th capacitor also with the filter circuit
Output end connection；
Wherein, the 5th capacitor, the 6th capacitor, the 7th capacitor and the 8th capacity earth.
Further, the third inductance is common mode inductance.
Further, the 5th capacitor, the 6th capacitor, the 7th capacitor and the 8th capacitor are common mode electricity
Hold.
Further, the second level filter circuit further include:
Second resistance, the first end of the second resistance are connect with the first end of the 8th capacitor, the second resistance
Second end connect with the second end of the 8th capacitor；
Wherein, the second resistance ground connection.
According to the other side of the utility model embodiment, a kind of electric machine controller is provided, including as described above
Filter circuit；
The input terminal of the filter circuit is connect with the power input of the electric machine controller, the filter circuit it is defeated
Outlet is connect with the driving power in the electric machine controller.
Further, the filter circuit is set on the drive circuit board of the electric machine controller；
Wherein, the input signal cable of the filter circuit and output signal line are respectively arranged at the driving circuit circuit board
Two sides.
According to the other side of the utility model embodiment, a kind of automobile, including motor control as described above are provided
Device processed.
The beneficial effects of the utility model are:
Above-mentioned technical proposal provides a kind of two stage filter circuit, and the electromagnetism that can filter out different frequency scope step by step is dry
It disturbs.And it is provided with the electric machine controller of the filter circuit, under the action of the filter circuit, can both electric machine controller be inhibited to produce
Raw electromagnetic interference reduces the influence caused by other electrical equipments of these electromagnetic interferences, and can inhibit other electrical equipments
The electromagnetic interference of generation improves the Electro Magnetic Compatibility of electric machine controller to the influence that electric machine controller generates.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical solution of the utility model embodiment
The attached drawing used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the utility model
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 shows one of schematic diagrames of filter circuit provided by the embodiment of the utility model；
Fig. 2 indicates the two of the schematic diagram of filter circuit provided by the embodiment of the utility model；
Fig. 3 indicates the schematic diagram of the power supply system of 12V DC power supply provided by the embodiment of the utility model；
Fig. 4 indicates the schematic diagram of the PCB layout of filter circuit provided by the embodiment of the utility model.
The reference numerals are as follows:
1, electric machine controller；2,12V DC circuit；3, vehicle-mounted radio；101, filter circuit；102, driving power；
103, drive circuit board；1011, first order filter circuit；1012, second level filter circuit；1013, input signal cable；1014,
Output signal line；1031, stratum；
C1, first capacitor；C2, the second capacitor；C3, third capacitor；C4, the 4th capacitor；C5, the 5th capacitor；C6, the 6th electricity
Hold；C7, the 7th capacitor；C8, the 8th capacitor；L1, the first inductance；L2, the second inductance；L3, third inductance L3；R1, first resistor；
R2, second resistance.
Specific embodiment
The exemplary embodiment of the utility model is more fully described below with reference to accompanying drawings.Although showing this in attached drawing
The exemplary embodiment of utility model, it being understood, however, that may be realized in various forms the utility model without should be by here
The embodiment of elaboration is limited.It is to be able to thoroughly understand the utility model, and energy on the contrary, providing these embodiments
It is enough to be fully disclosed to those skilled in the art the scope of the utility model.
According to the one aspect of the utility model embodiment, a kind of filter circuit 101 is provided.
As shown in Figure 1, the filter circuit 101 include: first order filter circuit 1011 and with first order filter circuit 1011
The second level filter circuit 1012 of connection.
Wherein, first order filter circuit 1011 filters out the electromagnetic interference of first frequency range, second level filter circuit 1012
The electromagnetic interference of second frequency range is filtered out, the maximum value within the scope of first frequency is less than the minimum value of second frequency range, example
Such as, first frequency range be [0.15,1] MHz, second frequency range be (1,108] MHz.
The utility model embodiment provides a kind of two stage filter circuit 101, and every level-one filter circuit 101 can filter out not
The electromagnetic interference of same frequency range.In an Application Example of the filter circuit 101, which is applied to
In electric machine controller 1.In the electric machine controller 1, filter circuit 101 is set to power input and the drive of electric machine controller 1
Between dynamic power supply 102, di/dt, dv/dt bring electromagnetism of 102 constant power device high-speed switch of driving power can inhibit in this way
Interference, prevents these electromagnetic interferences to be coupled to other electrical equipments by 12V DC power supply and (shares 12V with electric machine controller 1
The electrical equipment of DC circuit 2, such as vehicle-mounted radio 3), reduction is interfered caused by other electrical equipments.Meanwhile can also it press down
The electromagnetic interference that other electrical equipments generate electric machine controller 1 is made, the Electro Magnetic Compatibility of electric machine controller 1 is improved.
Specifically, as shown in Fig. 2, the first order filter circuit 1011 includes: first capacitor C1, the second capacitor C2, third
Capacitor C3, the 4th capacitor C4, the first inductance L1 and the second inductance L2.
Wherein, the first end of first capacitor C1 is connect with the electrode input end of filter circuit 101, and the second of first capacitor C1
End is connect with the negative input of filter circuit 101.First capacitor C1 is also connect with the second capacitor C2 and third capacitor C3 respectively,
Specifically: the first end of first capacitor C1 is connect with the first end of the second capacitor C2, second end and the third electricity of first capacitor C1
Hold the second end connection of C3.
Wherein, the second capacitor C2 is connected with third capacitor C3, specifically: the second end and third capacitor C3 of the second capacitor C2
First end connection.Meanwhile second capacitor C2 and third capacitor C3 ground connection, in this way can be the second capacitor C2 and third capacitor C3
Common reference point is provided, to reach better Anti-Jamming.
Wherein, the first end of the first inductance L1 is connect with the first end of the second capacitor C2, the second end of the first inductance L1 with
The first end of 4th capacitor C4 connects.The first end of second inductance L2 is connect with the second end of third capacitor C3, the second inductance L2
Second end connect with the second end of the 4th capacitor C4.The first end and second end of 4th capacitor C4 is also filtered with the second level respectively
Circuit 1012 connects.
Wherein, the first inductance L1 and the second inductance L2 is the identical differential mode inductance of inductance value.The electricity of first capacitor C1 and the 4th
Appearance C4 is differential mode capacitor, and the second capacitor C2 and third capacitor C3 are common mode capacitance.
In the utility model embodiment, first order filter circuit 1011 passes through first capacitor C1, the 4th capacitor C4, the first electricity
Feel L1 and the second inductance L2 and inhibit DM EMI, common mode interference is inhibited by the second capacitor C2 and third capacitor C3, specifically, leads to
Crossing the first inductance L1L1 can inhibit the electromagnetic interference of lower frequency.
Preferably, as shown in Fig. 2, first order filter circuit 1011 further include: first resistor R1.
Wherein, the first end of first resistor R1 is connect with the first end of third capacitor C3, the second end of first resistor R1 with
The second end of third capacitor C3 connects, while first resistor R1 is grounded.
First resistor R1 can impedance between matched filtering circuit 101 and ground, in the input terminal close to filter circuit 101
Resistance is arranged in position, can reduce from input terminal the extraneous electromagnetic interference being coupled in filter circuit 101 by common ground, guarantor
Demonstrate,prove the effect of 101 High frequency filter of filter circuit.
Preferably, in the utility model embodiment, the second capacitor C2 and third capacitor C3 are three-terminal capacitor.Three terminal capacitor
The high frequency equivalent inductance (Equivalent Series Inductance, abbreviation ESL) of device will be lower than common capacitor, it is ensured that
The rejection ability of high-frequency electromagnetic interference.
Specifically, as shown in Fig. 2, second level filter circuit 1012 includes: the 5th capacitor C5, the 6th capacitor C6, the 7th electricity
Hold C7, the 8th capacitor C8 and third inductance L3.
Wherein, the 5th capacitor C5 and the 6th capacitor C6 are connect with first order filter circuit 1011 respectively, specifically: the 5th electricity
The first end for holding C5 is connect with the first end of the 4th capacitor C4, and the second end of the 6th capacitor C6 and the second end of the 4th capacitor C4 connect
It connects.
Wherein, the 5th capacitor C5 is connect with the 6th capacitor C6, specifically: the second end and the 6th capacitor C6 of the 5th capacitor C5
First end connection.Meanwhile the 5th capacitor C5 and the 6th capacitor C6 ground connection, in this way can be the 5th capacitor C5 and the 6th capacitor C6
Common reference point is provided, to reach better Anti-Jamming.
Wherein, the first end of third inductance L3 is connect with the first end of the 5th capacitor C5, the second end of third inductance L3 with
The second end of 6th capacitor C6 connects, and the third end of third inductance L3 is connect with the first end of the 7th capacitor C7, third inductance L3
The 4th end connect with the second end of the 8th capacitor C8.Wherein, anode of the first end of the 7th capacitor C7 also with filter circuit 101
Output end connection, the second end of the 8th capacitor C8 are also connect with the cathode output end of filter circuit 101.
Wherein, the 7th capacitor C7 is connect with the 8th capacitor C8, specifically: the second end and the 8th capacitor C8 of the 7th capacitor C7
First end connection.Meanwhile the 7th capacitor C7 and the 8th capacitor C8 ground connection, in this way can be the 7th capacitor C7 and the 8th capacitor C8
Common reference point is provided, to reach better Anti-Jamming.
Wherein, third inductance L3 is common mode inductance.5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7 and the 8th capacitor
C8 is common mode capacitance.
In the utility model embodiment, second level filter circuit 1012 passes through the 5th capacitor C5, the 6th capacitor C6, the 7th electricity
Holding C7, the 8th capacitor C8 and third inductance L3 inhibits common mode interference specifically to can inhibit upper frequency by third inductance L3
Electromagnetic interference.
Preferably, as shown in Fig. 2, second level filter circuit 1012 further include: second resistance R2.
Wherein, the first end of second resistance R2 is connect with the first end of the 8th capacitor C8, the second end of second resistance R2 with
The second end of 8th capacitor C8 connects, meanwhile, second resistance R2 ground connection.
Second resistance R2 can impedance between matched filtering circuit 101 and ground, in the output end close to filter circuit 101
Resistance is arranged in position, can reduce from output end the extraneous electromagnetic interference being coupled in filter circuit 101 by common ground, guarantor
Demonstrate,prove the effect of 101 High frequency filter of filter circuit.
Preferably, in the utility model embodiment, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7 and the 8th capacitor
C8 is three-terminal capacitor.The high frequency equivalent inductance of three-terminal capacitor will be lower than common capacitor, it is ensured that high-frequency electromagnetic interference
Rejection ability.
Preferably, in the utility model embodiment, the inductance in filter circuit 101 is all made of DMR40 material, the material
Magnetic core have good frequency characteristic, temperature characterisitic.
Filter circuit 101 provided by the embodiment of the utility model inhibits different frequency range by two stage filter circuit 101 step by step
Electromagnetic interference, realize broadband filtering.In addition, by the way that resistance is arranged in the input terminal and output end of filter circuit 101 respectively,
Carry out the impedance between matched filtering circuit 101 and ground, reduce the coupling of input and output, guarantees 101 High frequency filter of filter circuit
Effect.
Finally, it should be noted that for capacitor, inductance and resistance involved in the utility model embodiment,
Capacitance, inductance value or resistance value can select according to actual needs, and the utility model embodiment is not limited this.
According to the other side of the utility model embodiment, a kind of electric machine controller 1 is provided.
As shown in figure 3, the electric machine controller 1 includes: filter circuit 101 as described above.
Wherein, the input terminal of the filter circuit 101 is connect with the power input of electric machine controller 1, the filter circuit 101
Output end connect with the driving power 102 in electric machine controller 1.
Filter circuit 101 is set to the power input of electric machine controller 1, can be inhibited in this way by filter circuit 101
Di/dt, dv/dt bring electromagnetic interference of 102 constant power device high-speed switch of driving power, prevent these electromagnetic interferences from passing through
12V DC power supply is coupled to other electrical equipments, and reduction is interfered caused by other electrical equipments.Meanwhile being also able to suppress it
The electromagnetic interference that his electrical equipment generates electric machine controller 1 improves the Electro Magnetic Compatibility of electric machine controller 1.
Wherein, which is set in electric machine controller 1, more particularly to reduce electric machine controller 1 to vehicle-mounted receipts
The interference that sound machine 3 generates.
As shown in figure 3, vehicle-mounted radio 3 and electric machine controller 1 share 12V DC power supply, the electricity that electric machine controller 1 generates
Magnetic disturbance can be coupled to vehicle-mounted radio 3 by 12V DC power supply, generate interference to vehicle-mounted radio 3, influence vehicle-mounted radio
The service performance of machine 3.
But after the filter circuit 101 is arranged in electric machine controller 1, since filter circuit 101 inhibits electric machine controller 1
The electromagnetic interference of generation, so as to reduce the interference being coupled in vehicle-mounted radio 3 by 12V DC power supply, to vehicle-mounted receipts
Sound machine 3 plays the role of being effectively protected.Wherein, the common mode inductance in the filter circuit 101 and differential mode inductance apply energy simultaneously
Enough ensure there is the good ability for inhibiting interference in 150kHz to 108MHz frequency range, and carries the filter circuit 101
Electric machine controller 1 low pressure conduction meet GB/T18655 grade three requirement, 78MHz~108MHz meets grade four
It is required that.
Wherein, it is the electromagnetic interference of 150kHz to 1MHz that differential mode inductance, which inhibits frequency range, and common mode inductance inhibits frequency model
Enclose the electromagnetic interference for 1MHz to 108MHz.
Further, for general automobile only with reference to ground, interior all electric components are all connected to the reference of vehicle body on the ground, whole
The electromagnetic interference that other interior electrical equipments generate easily passes through common ground, is coupled in filter circuit 101.It is public in order to reduce
The coupling of ground wire, in filter circuit 101 close to input terminal and close to output end position, be respectively provided with first resistor R1 and
Second resistance R2, the two resistance can play the role of matched filtering circuit 101 and motor control peel resistance, guarantee filtering
The effect of 101 High frequency filter of circuit.
It should be noted that the resistance value of first resistor R1 and second resistance R2 can select according to actual needs, this is practical
It is preferably 2 ohm in new embodiment.
Further, in the utility model embodiment, filter circuit 101 is set to the drive circuit board of electric machine controller 1
On 103.
Wherein, as shown in figure 4, in order to ensure filter circuit 101 High frequency filter characteristic, in the input of filter circuit 101
End uses Faraday shield, and the input signal cable 1013 of filter circuit 101 and output signal line 1014 are respectively arranged at drive
The two sides of dynamic circuit circuit board, by the stratum 1031 in drive circuit board 103, by the input terminal of filter circuit 101 and output
End is isolated, and the intensity of input and output coupling is reduced.Preferably, input signal cable 1013 is set to drive circuit board 103
Unholiness region, output signal line 1014 are set to the clean area of drive circuit board 103.
In conclusion a two stage filter circuit 101 is provided in electric machine controller 1 in the utility model embodiment,
The electromagnetic interference that the filter circuit 101 can both inhibit electric machine controller 1 to generate reduces electric machine controller 1 to other electrical productions
Raw interference plays the role of being effectively protected particularly with vehicle-mounted radio 3 to vehicle-mounted radio 3, and can inhibit other
The electromagnetic interference that electrical equipment generates electric machine controller 1 improves the Electro Magnetic Compatibility of electric machine controller 1.
According to the other side of the utility model embodiment, a kind of automobile, including motor control as described above are provided
Device 1 processed.
A two stage filter circuit has been arranged inside in electric machine controller 1 in automobile provided by the embodiment of the utility model
101, the electromagnetic interference which can both inhibit electric machine controller 1 to generate reduces electric machine controller 1 to other electricity
The interference that gas generates plays the role of being effectively protected particularly with vehicle-mounted radio 3 to vehicle-mounted radio 3, and can inhibit
The electromagnetic interference that other electrical equipments generate electric machine controller 1 improves the Electro Magnetic Compatibility of electric machine controller 1.For setting
There is the automobile of the electric machine controller 1, be able to ascend the vehicle performance of automobile, improves the market competitiveness of vehicle.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" etc. refer to
The orientation or positional relationship shown be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the utility model and
Simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construction
And operation, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is at least two, example
Such as two, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection is also possible to be electrically connected or can communicate with each other；It can be directly connected, the indirect phase of intermediary can also be passed through
Even, the connection inside two elements or the interaction relationship of two elements be can be.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it
"lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to
Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above "
One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special
Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only
Indicate that first feature horizontal height is less than second feature.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
Although the preferred embodiment of the utility model embodiment has been described, those skilled in the art are once learnt
Basic creative concept, then additional changes and modifications can be made to these embodiments.So appended claims are intended to solve
It is interpreted as including preferred embodiment and all change and modification for falling into the utility model embodiment range.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in process, method, article or the terminal device for including the element.
Claims (12)
1. a kind of filter circuit characterized by comprising
First order filter circuit (1011)；
The second level filter circuit (1012) being connect with the first order filter circuit (1011)；
Wherein, the first order filter circuit (1011) filters out the electromagnetic interference of first frequency range, the second level filtered electrical
Road (1012) filters out the electromagnetic interference of second frequency range, and the maximum value within the scope of the first frequency is less than the second frequency
Minimum value in range.
2. filter circuit according to claim 1, which is characterized in that the first order filter circuit (1011) includes:
The first end of first capacitor (C1), the first capacitor (C1) is connect with the electrode input end of the filter circuit (101),
The second end of the first capacitor (C1) is connect with the negative input of the filter circuit (101)；
The first end of second capacitor (C2), second capacitor (C2) is connect with the first end of the first capacitor (C1)；
Third capacitor (C3), the first end of the third capacitor (C3) is connect with the second end of second capacitor (C2), described
The second end of third capacitor (C3) is connect with the second end of the first capacitor (C1)；
First inductance (L1), the first end of first inductance (L1) are connect with the first end of second capacitor (C2)；
Second inductance (L2), the first end of second inductance (L2) are connect with the second end of the third capacitor (C3)；
4th capacitor (C4), the first end of the 4th capacitor (C4) is connect with the second end of first inductance (L1), described
The second end of 4th capacitor (C4) is connect with the second end of second inductance (L2)；The first end of 4th capacitor (C4) and
Second end is also connect with the second level filter circuit (1012) respectively；
Wherein, second capacitor (C2) and the third capacitor (C3) ground connection.
3. filter circuit according to claim 2, which is characterized in that first inductance (L1) and second inductance
It (L2) is the identical differential mode inductance of inductance value.
4. filter circuit according to claim 2, which is characterized in that the first capacitor (C1) and the 4th capacitor
It (C4) is differential mode capacitor；Second capacitor (C2) and the third capacitor (C3) are common mode capacitance.
5. according to filter circuit described in claim 2,3 or 4, which is characterized in that the first order filter circuit (1011) is also
Include:
First resistor (R1), the first end of the first resistor (R1) is connect with the first end of the third capacitor (C3), described
The second end of first resistor (R1) is connect with the second end of the third capacitor (C3)；
Wherein, first resistor (R1) ground connection.
6. filter circuit according to claim 1, which is characterized in that the second level filter circuit (1012) includes:
The 5th capacitor (C5) and the 6th capacitor (C6) being connect respectively with the first order filter circuit (1011), the 5th electricity
The second end for holding (C5) is connect with the first end of the 6th capacitor (C6)；
The first end of third inductance (L3), the third inductance (L3) is connect with the first end of the 5th capacitor (C5), described
The second end of third inductance (L3) is connect with the second end of the 6th capacitor (C6)；
7th capacitor (C7), the first end of the 7th capacitor (C7) are connect with the third end of the third inductance (L3)；It is described
The first end of 7th capacitor (C7) is also connect with the cathode output end of the filter circuit (101)；
The first end of 8th capacitor (C8), the 8th capacitor (C8) is connect with the second end of the 7th capacitor (C7), described
The second end of 8th capacitor (C8) is connect with the 4th end of the third inductance (L3)；The second end of 8th capacitor (C8) is also
It is connect with the cathode output end of the filter circuit (101)；
Wherein, the 5th capacitor (C5), the 6th capacitor (C6), the 7th capacitor (C7) and the 8th capacitor (C8)
Ground connection.
7. filter circuit according to claim 6, which is characterized in that the third inductance (L3) is common mode inductance.
8. filter circuit according to claim 6, which is characterized in that the 5th capacitor (C5), the 6th capacitor
(C6), the 7th capacitor (C7) and the 8th capacitor (C8) are common mode capacitance.
9. according to filter circuit described in claim 6,7 or 8, which is characterized in that the second level filter circuit (1012) is also
Include:
The first end of second resistance (R2), the second resistance (R2) is connect with the first end of the 8th capacitor (C8), described
The second end of second resistance (R2) is connect with the second end of the 8th capacitor (C8)；
Wherein, second resistance (R2) ground connection.
10. a kind of electric machine controller, which is characterized in that including the filter circuit as described in any one of claim 1 to 9
(101)；
The input terminal of the filter circuit (101) is connect with the power input of the electric machine controller (1), the filter circuit
(101) output end is connect with the driving power (102) in the electric machine controller (1).
11. electric machine controller according to claim 10, which is characterized in that the filter circuit (101) is set to described
On the drive circuit board (103) of electric machine controller (1)；
Wherein, the input signal cable (1013) of the filter circuit (101) and output signal line (1014) are respectively arranged at described
The two sides of drive circuit board (103).
12. a kind of automobile, which is characterized in that including electric machine controller described in claim 10 or 11.
Priority Applications (1)
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| CN201820410982.5U CN208299681U (en) | 2018-03-26 | 2018-03-26 | A kind of filter circuit, electric machine controller and automobile |
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| CN201820410982.5U CN208299681U (en) | 2018-03-26 | 2018-03-26 | A kind of filter circuit, electric machine controller and automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109756202A (en) * | 2019-01-30 | 2019-05-14 | 华勤通讯技术有限公司 | A kind of motor drive circuit and terminal |
| CN113141166A (en) * | 2020-01-20 | 2021-07-20 | 北京新能源汽车股份有限公司 | Electromagnetic interference suppression device and vehicle |
-
2018
- 2018-03-26 CN CN201820410982.5U patent/CN208299681U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109756202A (en) * | 2019-01-30 | 2019-05-14 | 华勤通讯技术有限公司 | A kind of motor drive circuit and terminal |
| CN113141166A (en) * | 2020-01-20 | 2021-07-20 | 北京新能源汽车股份有限公司 | Electromagnetic interference suppression device and vehicle |
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