CN206765820U - A kind of filter circuit and new energy electric motor vehicle electric-control system - Google Patents
A kind of filter circuit and new energy electric motor vehicle electric-control system Download PDFInfo
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- CN206765820U CN206765820U CN201720334508.4U CN201720334508U CN206765820U CN 206765820 U CN206765820 U CN 206765820U CN 201720334508 U CN201720334508 U CN 201720334508U CN 206765820 U CN206765820 U CN 206765820U
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Abstract
A kind of filter circuit and new energy electric motor vehicle electric-control system, the filter circuit are used to connect input power and power supply circuit, and the filter circuit includes：Be connected at least one high impedance unit and high impedance unit between the positive source of input power and the power supply positive pole of power supply circuit correspondingly at least one Low ESR unit, be connected to input power power cathode and power supply circuit power supply negative pole between it is at least one in low-frequency noise in high impedance and be in low-impedance impedance unit in high-frequency noise, the output end of the corresponding high impedance unit of each Low ESR unit connection and the power supply negative pole.The utility model has good inhibition for low frequency, high-frequency noise, can suppress Conducted EMI interference caused by electric-control system work while can suppress external disturbance to electric-control system.
Description
Technical field
It the utility model is related to electric automobiles, more particularly to a kind of filter circuit and the automatically controlled system of new energy electric motor vehicle
System.
Background technology
The vehicle electric part of orthodox car only has low-voltage equipment, and the main linear power supply of the power supply type of low-voltage equipment
With two kinds of Buck power supplys, interference type is relatively unambiguous simple, and therefore, the EMI interference of orthodox car is relative to be easier to solve.It is but new
Energy automobile electric-control system power supply includes low pressure and high pressure two parts.Because function needs, low-pressure section number of power sources is more, species
It is more and more powerful.High-pressure section IGBT/MOS can produce very strong interference when working, it is easy to be coupled to low-pressure port and cause
EMI (Electromagnetic Interference) problem.Further, since motor space is small, integrated level is high, internal electron system
System is complicated, is easy to interfere between equipment, once malfunctioned caused by there is interference, it will produce it is extremely serious after
Fruit.
Utility model content
The technical problems to be solved in the utility model is, for the above-mentioned more work(of low-pressure port noise type of prior art
Rate is big and the defects of being vulnerable to the noise jamming of outside, there is provided one kind can suppress Conducted EMI caused by electric-control system work
Disturb while the filter circuit and new energy electric motor vehicle electric-control system of influence of the external disturbance to electric-control system can be suppressed.
Technical scheme is used by the utility model solves its technical problem：A kind of filter circuit is constructed, for connecting
Input power and power supply circuit, the filter circuit include：It is connected to the power supply of the positive source and power supply circuit of input power
At least one high impedance unit between positive pole, with high impedance unit correspondingly at least one Low ESR unit, be connected to
At least one between the power cathode of input power and the power supply negative pole of power supply circuit in low-frequency noise in high impedance and
It is in low-impedance impedance unit during high-frequency noise, each Low ESR unit connects output end and the institute of corresponding high impedance unit
State power supply negative pole.
In filter circuit described in the utility model, the impedance unit includes differential mode inductance, electric capacity and resistance, its
In, it is in parallel with differential mode inductance after electric capacity and resistant series.
In filter circuit described in the utility model, the high impedance unit is differential mode inductance, the Low ESR unit
For electric capacity.
In filter circuit described in the utility model, the quantity of the high impedance unit and the Low ESR unit is equal
For two, the quantity of the impedance unit is one.
In the filter circuit described in the utility model, input power is low pressure input power, the power supply circuit
For low-voltage power supply circuit.
The invention also discloses a kind of new energy electric motor vehicle electric-control system, including described filter circuit.
Implement filter circuit and new energy electric motor vehicle electric-control system of the present utility model, have the advantages that：It is right
For low-frequency noise, due to having high impedance unit between positive source and the power supply positive pole of power supply circuit, therefore can be with
Prevent interference noise from conducting to positive source, and be so that interference noise and returned and negative pole of powering by corresponding Low ESR unit
The equipment of connection, interference source finally is returned under the obstruction in the impedance unit of high impedance status, meanwhile, transmitted in negative wire
Low-frequency noise then by equipment return to interference source；For high-frequency noise, impedance unit to connect with input power
Low impedance state is presented in the negative wire connect, and because exists very between the main track and negative wire being connected under high frequency situations with input power
Small distribution capacity, and this very small distribution capacity can show very low impedance at high frequencies, at the same main track with
Loop circuit impedance between negative wire can constantly increase as the loop area formed between two lines increases, and the loop circuit impedance can suppress
High-frequency Interference noise transmits to positive source on main track, forces noise to return to negative wire by distribution capacity between two lines, so that
The interference obtained on main track returns to interference source by negative wire and equipment, meanwhile, the High-frequency Interference noise transmitted in negative wire then passes through
Return to interference source to equipment.In a word, the utility model can not only suppress Conducted EMI interference caused by electric-control system work but also can
To suppress influence of the external disturbance to electric-control system.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to the accompanying drawing of offer：
Fig. 1 is the electrical block diagram of the preferred embodiment of the utility model filter circuit.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the exemplary embodiments of the present invention.But the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose for providing these embodiments is made to the disclosure more thorough and comprehensive.
It should be noted that word " connected " or " connection ", not only include two entities being joined directly together, also include logical
Cross and be indirectly connected with other entities beneficial to improvement.Word " equal ", " identical " " simultaneously " or other similar use
Language, be not limited to it is absolute equal or identical in mathematical term, implement this patent described in right when, can be on engineering significance
It is close or in acceptable error range.Unless otherwise defined, all of technologies and scientific terms used here by the article with
The implication that the those skilled in the art for belonging to of the invention are generally understood that is identical.Made in the description of the invention herein
Term is intended merely to describe the purpose of specific embodiment, it is not intended that in the limitation present invention.
The total thinking of the utility model is：Filter circuit is designed, for connecting input power and power supply circuit, the filtering
Circuit includes：At least one high impedance list being connected between the positive source of input power and the power supply positive pole of power supply circuit
Member, with high impedance unit correspondingly at least one Low ESR unit, be connected to input power power cathode and power supply electricity
At least one between the power supply negative pole on road in high impedance and is in low-impedance impedance in high-frequency noise in low-frequency noise
Unit, each Low ESR unit connect the output end of corresponding high impedance unit and the power supply negative pole.
In order to be better understood from above-mentioned technical proposal, below in conjunction with Figure of description and preferred embodiment to above-mentioned skill
Art scheme is described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to present techniques
The detailed description of scheme, rather than the restriction to technical scheme, in the case where not conflicting, the embodiment of the present invention with
And the technical characteristic in embodiment can be mutually combined.
Filter circuit of the present utility model is used to connect input power and power supply circuit, in the present embodiment, the input electricity
Source is low pressure input power, and the power supply circuit is low-voltage power supply circuit.Two high impedance units are represented with reference to figure 1,11,12,
21st, 22 two Low ESR units are represented, 31 represent impedance unit.PE is equipment, and Ui+, Ui- be respectively low pressure input power
Positive source, power cathode, voltage range is 12V~48V, and current range is 0~10A；Uo+, Uo- are respectively low pressure input
Positive negative output of the power supply after wave filter of the present utility model, namely the power supply positive pole of low-voltage power supply circuit and power supply negative pole,
Internal low-voltage circuit can produce low frequency and High-frequency Interference noise in the course of the work, and the interference noise passes through this wave filter to port
Transmission can be effectively suppressed.The electric wire between Ui+ and Uo+ is referred to as main track below, the electric wire between Uo- and Ui- is claimed
For negative wire.
In preferred embodiment, the impedance unit 31 includes differential mode inductance L3, electric capacity C3 and resistance R, wherein, electric capacity C3
It is in parallel with differential mode inductance L3 after being connected with resistance R.High impedance unit 11,12 is respectively differential mode inductance L1, L2.Corresponding Low ESR
Unit 21,22 is respectively electric capacity C1, C2.
Traditional is very easy to saturation in high current based on the filter circuit of common mode inductance, and is difficult to play filter in high frequency
Ripple acts on, and common mode inductance volume is big, expensive.This filter circuit can effectively be evaded using differential mode inductance L1, L2, L3
The saturation problem of common mode inductance, and can play preferable filter action in low frequency and high frequency.For example, differential mode inductance L1, L2 can
Low-frequency power noise in the form of for differential mode plays extraordinary filter action, and differential mode inductance L1 and L3 can be to common mode forms
The main power noise of low frequency preferably filtered.And the parallel resistance R and electric capacity C3 on differential mode inductance L3, make in high frequency
Obtain negative wire and low impedance state is presented, consequently facilitating the high-frequency noise on main track returns to interference source by distribution capacity.Moreover, compare
Common mode inductance, differential mode inductance small volume, it will largely reduce filter circuit volume, the circuit of lifting means integrates close
Degree, equipment volume is reduced, save cost.
In the present embodiment, consider from cost, filter effect, small product size each side, using two differential mode inductance L1,
L2, it so both can preferably ensure the effect of filtering, the volume requirement to differential mode inductance L1, L2, Er Qiecheng can be reduced again
This is relatively low.
Of course, it should be understood that the number of the differential mode inductance concatenated between positive source Ui+, power supply positive pole Uo+ is not
It is limited to this, can moreover be only one, or for three, four etc., it can also be substituted with the differential mode inductance of several series connection
In a differential mode inductance substitute one of electric capacity as low-resistance as high impedance unit, or per several shunt capacitances
Anti- unit, these are all the simple deformations of the present embodiment, all within the scope of protection of the utility model.
Below in conjunction with the accompanying drawings 1, the operation principle of preferred embodiment is described in detail.
For low frequency interfering noise, differential mode inductance shows high-impedance behavior, and low impedance characteristic is presented in electric capacity, interior
The overwhelming majority interference of conducted EMI noise caused by portion can be selected from low in the case where the high impedance of the differential mode inductance L2 on main track stops
The electric capacity C2 of impedance returns to negative wire, and remaining fraction is disturbed when outwards being transmitted by differential mode inductance L2 in differential mode inductance L1
High impedance stop it is lower further can return to negative wire from low-impedance electric capacity C1, and it is electric to return to the interference of the negative wire differential mode in negative wire
Interference source will be returned under L3 high resistant obstruction from negative wire or PE by feeling.It can be seen that although electric capacity C2 can be to being transmitted in negative wire interference
Certain low impedance path is formed, but because differential mode inductance L1 high impedance is present, the interference in negative wire is then without going past electricity
Hold C2 outwards to transmit from main track and form external interference, the meeting in the case where inductance L3 high impedance stops of all interference in final negative wire
Directly return and disturb from PE, be finally reached and suppress internal low-frequency interference noise externally caused Conducted EMI；
At high frequencies, inductance can show certain capacitive character due to the presence of parasitic parameter, same electric capacity due to
The presence of parasitic parameter can show certain inductive, therefore the high frequency resistance of filtering differential mode inductance L1, L2, L3 in accompanying drawing 1
It is anti-to reduce, the inhibition of High-frequency Interference noise will also be reduced, and electric capacity C2 high-frequency resistance can increase, to High-frequency Interference
Noise can also play certain inhibition, so that High-frequency Interference returns to interference source without image of Buddha low-frequency disturbance is the same nearby.
But the presence of the series circuit due to differential mode inductance L3 both ends resistance R in parallel and electric capacity C3, it will effectively change in high frequency
Kind differential mode inductance L3 quality factor, makes it show the stable Low ESR of comparison so that negative wire in high-frequency noise at
In low impedance state.Again because very small distribution capacity between main track and negative wire be present under high frequency situations, and this is very small
Distribution capacity can show very low impedance at high frequencies, while the loop circuit impedance between main track and negative wire can be with two
The loop area formed between line increases and constantly increased, and the loop circuit impedance can suppress High-frequency Interference noise on main track and be passed to port
It is defeated, force the high-frequency noise on main track to return to negative wire by distribution capacity between two lines, so that interference passes through negative wire and PE
Return to interference source；Meanwhile the High-frequency Interference noise transmitted in negative wire then returns to interference source by PE, it is internal high to be finally reached suppression
The external caused Conducted EMI of frequency interference noise.
Effective application of this filter circuit on new energy car will largely lift the EMC performances of vehicle, effectively
The compatible ability of finished vehicle electronic equipment is lifted, lifts the riding experience sense of vehicle to a certain extent, support vehicles are driven
Multiply security.Therefore, based on same inventive concept, the invention also discloses a kind of new energy electric motor vehicle electric-control system, bag
Include described filter circuit.
Implement filter circuit and new energy electric motor vehicle electric-control system of the present utility model, have the advantages that：It is right
For low-frequency noise, due to having high impedance unit between positive source and the power supply positive pole of power supply circuit, therefore can be with
Prevent interference noise from conducting to positive source, and be so that interference noise and returned and negative pole of powering by corresponding Low ESR unit
The equipment of connection, interference source finally is returned under the obstruction in the impedance unit of high impedance status, meanwhile, transmitted in negative wire
Low-frequency noise then by equipment return to interference source；For high-frequency noise, impedance unit to connect with input power
Low impedance state is presented in the negative wire connect, and because exists very between the main track and negative wire being connected under high frequency situations with input power
Small distribution capacity, and this very small distribution capacity can show very low impedance at high frequencies, at the same main track with
Loop circuit impedance between negative wire can constantly increase as the loop area formed between two lines increases, and the loop circuit impedance can suppress
High-frequency Interference noise transmits to positive source on main track, forces noise to return to negative wire by distribution capacity between two lines, so that
The interference obtained on main track returns to interference source by negative wire and equipment, meanwhile, the High-frequency Interference noise transmitted in negative wire then passes through
Return to interference source to equipment.In a word, the utility model can not only suppress Conducted EMI interference caused by electric-control system work but also can
To suppress influence of the external disturbance to electric-control system.
Embodiments of the invention are described above in conjunction with accompanying drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, one of ordinary skill in the art
Under the enlightenment of the present invention, in the case of present inventive concept and scope of the claimed protection is not departed from, it can also make a lot
Form, these are belonged within the protection of the present invention.
Claims (6)
1. a kind of filter circuit, for connecting input power and power supply circuit, it is characterised in that the filter circuit includes：Even
At least one high impedance unit and high impedance list being connected between the positive source of input power and the power supply positive pole of power supply circuit
The power supply negative pole of first one-to-one at least one Low ESR unit, the power cathode for being connected to input power and power supply circuit it
Between it is at least one in low-frequency noise in high impedance and be in low-impedance impedance unit in high-frequency noise, each Low ESR
Unit connects the output end of corresponding high impedance unit and the power supply negative pole.
2. filter circuit according to claim 1, it is characterised in that the impedance unit includes differential mode inductance, electric capacity
And resistance, wherein, it is in parallel with differential mode inductance after electric capacity and resistant series.
3. filter circuit according to claim 1 or 2, it is characterised in that the high impedance unit is differential mode inductance, described
Low ESR unit is electric capacity.
4. filter circuit according to claim 1, it is characterised in that the high impedance unit and the Low ESR unit
Quantity be two, the quantity of the impedance unit is one.
5. filter circuit according to claim 1, it is characterised in that the input power is low pressure input power, described
Power supply circuit is low-voltage power supply circuit.
6. a kind of new energy electric motor vehicle electric-control system, it is characterised in that including the filtered electrical as described in claim any one of 1-5
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720334508.4U CN206765820U (en) | 2017-03-31 | 2017-03-31 | A kind of filter circuit and new energy electric motor vehicle electric-control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720334508.4U CN206765820U (en) | 2017-03-31 | 2017-03-31 | A kind of filter circuit and new energy electric motor vehicle electric-control system |
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| Publication Number | Publication Date |
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| CN206765820U true CN206765820U (en) | 2017-12-19 |
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| CN201720334508.4U Active CN206765820U (en) | 2017-03-31 | 2017-03-31 | A kind of filter circuit and new energy electric motor vehicle electric-control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3934041A3 (en) * | 2020-07-01 | 2022-01-19 | Smart Wires Inc. | Protection from and filtering of disturbances for serial connected facts |
-
2017
- 2017-03-31 CN CN201720334508.4U patent/CN206765820U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3934041A3 (en) * | 2020-07-01 | 2022-01-19 | Smart Wires Inc. | Protection from and filtering of disturbances for serial connected facts |
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