CN204205999U - A kind of power circuit of electric vehicle motor controller - Google Patents
A kind of power circuit of electric vehicle motor controller Download PDFInfo
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- CN204205999U CN204205999U CN201420680132.9U CN201420680132U CN204205999U CN 204205999 U CN204205999 U CN 204205999U CN 201420680132 U CN201420680132 U CN 201420680132U CN 204205999 U CN204205999 U CN 204205999U
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Abstract
The utility model discloses a kind of power circuit of electric vehicle motor controller, comprise PWM controller, switching circuit, transformer and feedback circuit, the DC power supply that PWM controller inputs with transformer and outside is connected, PWM controller is by the operation of switching circuit control transformer, transformer exports at least one road DC power supply outward, feedback circuit detects the voltage signal of the DC power supply that transformer exports outward and the voltage signal detected is delivered to PWM controller, coupling capacitance is connected with between the primary coil of transformer and secondary coil, this circuit structure is simple, the stable DC power supply of energy output multi-channel, and the modulation width of this circuit is large, power supply conversion efficiency is high, conversion is stable, reliably.
Description
Technical field:
The utility model relates to a kind of power circuit of electric vehicle motor controller.
Background technology:
In electric automobile, the stability of electric machine controller power supply part is considerable to electric machine controller.The power supply circuit of current electric machine controller, most buffer circuit or lifting modulation translation circuit adopting inverse-excitation converting mode.The buffer circuit of inverse-excitation converting mode has the simple feature of circuit, but also has weak point, and the volume of such as inverse-excitation converting high frequency switch transformer is large, and conversion efficiency is on the low side, low-voltage time work unreliable also unstable.Lifting modulation translation circuit adopts inductive mode, single DC power supply can only be exported outward, also quadratic transformation is needed to multiple-channel output, use very inconvenient, and when the DC power supply generation voltage fluctuation inputted, lifting modulation translation circuit can be caused to export unstable, have a strong impact on the stability of electric machine controller work.
Summary of the invention:
The purpose of this utility model is to provide a kind of power circuit of electric vehicle motor controller, and this circuit structure is simple, can the stable DC power supply of output multi-channel, and the modulation width of this circuit is large, and power supply conversion efficiency is high, conversion is stable, reliably.
The purpose of this utility model is achieved by following technical proposals.
A kind of power circuit of electric vehicle motor controller, comprise PWM controller, switching circuit, transformer and feedback circuit, the DC power supply that PWM controller inputs with transformer and outside is connected, PWM controller is by the operation of switching circuit control transformer, transformer exports at least one road DC power supply outward, feedback circuit detects the voltage signal of the DC power supply that transformer exports outward and the voltage signal detected is delivered to PWM controller, is connected with coupling capacitance between the primary coil of transformer and secondary coil.
Switching circuit described above adopts switch mosfet pipe, and the output of PWM controller is connected with one end of transformer by switch mosfet pipe, and the DC power supply that the other end of transformer is inputted by filter circuit and outside is connected.
One end of coupling capacitance described above is connected between switch mosfet pipe and transformer, and the other end is connected with transformer secondary coil.
Transformer described above exports two-way DC power supply outward, and the two-way DC power supply that transformer exports outward comprises a road and exports as the DC power supply of positive voltage and a road export DC power supply for negative voltage.
The output of filter circuit described above connects the input of overvoltage/under-voltage protecting circuit; the output of overvoltage/under-voltage protecting circuit is connected with the input of PWM controller, and overvoltage/under-voltage protecting circuit is being set in the voltage control being input to PWM controller within value range.
Reverse-connection preventing circuit is provided with between the DC power supply of outside input described above and PWM controller.
The utility model compared with prior art, has following effect:
1) be connected with coupling capacitance between the primary coil of transformer and secondary coil, make the stable DC power supply of power circuit energy output multi-channel, and the modulation width of this circuit is large, power supply conversion efficiency is high, conversion is stable, reliably;
2) transformer exports two-way DC power supply outward, and the two-way DC power supply that transformer exports outward comprises a road and exports as the DC power supply of positive voltage and a road export DC power supply for negative voltage, provides multi-channel dc power supply, meets different user demands;
3) output of filter circuit connects the input of overvoltage/under-voltage protecting circuit; the output of overvoltage/under-voltage protecting circuit is connected with the input of PWM controller; overvoltage/under-voltage protecting circuit is being set in the voltage control being input to PWM controller within value range; the wide input voltage range of power circuit, and the conversion of transformer can be made more stable, reliable.
Accompanying drawing illustrates:
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is physical circuit figure of the present utility model.
Embodiment:
Also by reference to the accompanying drawings the utility model is described in further detail below by specific embodiment.
As depicted in figs. 1 and 2, the utility model is a kind of power circuit of electric vehicle motor controller, comprise PWM controller 1, switching circuit 2, transformer 3 and feedback circuit 4, the DC power supply that PWM controller 1 inputs with transformer 3 and outside is connected, PWM controller 1 is by the operation of switching circuit 2 control transformer 3, transformer 3 exports at least one road DC power supply outward, feedback circuit 4 detects the voltage signal of the DC power supply that transformer exports outward and the voltage signal detected is delivered to PWM controller 1, coupling capacitance C10 is connected with between the primary coil of transformer 3 and secondary coil, C11.Described switching circuit 2 adopts switch mosfet pipe Q2, the output of PWM controller 1 is connected with one end of transformer 3 primary coil by switch mosfet pipe Q2, and the other end of transformer 3 primary coil is connected with the DC power supply that outside inputs by filter circuit 5.One end of coupling capacitance C10, C11 is connected between switch mosfet pipe and transformer 3 primary coil, and the other end is connected with transformer 3 secondary coil.
Described PWM controller 1 comprises chip IC 1, diode D2 and D3, resistance R16, R10, R13, R6, R8, R9, R11 and R15, electric capacity C28, C16, C18, C14, C19, C17, C15, C29 and C27.
Described transformer 3 comprises transformer B1.
Described feedback circuit 4 comprises voltage stabilizing didoe DW2, resistance R2, R7 and R5.
Described filter circuit 5 comprises filter inductance L2, sudden-wave absorbing pipe TVS1, electric capacity C7, C8, C21, C22 and C23.
When the magnitude of voltage of the DC power supply of outside input is less than the magnitude of voltage of the DC power supply exported outward, power circuit enters the strong state of boosting modulation, the modulation width of transformer B1 becomes large, probably equal the modulation width of 2 times of existing transformer B1, PWM controller 1 controls switch mosfet pipe Q2 conducting, now, the primary coil of transformer B1 is equivalent to the existence of an inductance L, the electric energy be stored in inside coupling capacitance C10, C11 improves the magnitude of voltage of the DC power supply exported outward, makes the magnitude of voltage of the DC power supply exported outward be stabilized within the scope of setting;
When the magnitude of voltage of the DC power supply of outside input is greater than the magnitude of voltage of the DC power supply exported outward, power circuit enters the strong state of step-down modulation, the modulation width of transformer B1 diminishes, probably equal the modulation width of existing transformer B1, PWM controller 1 controls switch mosfet pipe Q2 and closes, now, the DC power supply exported outward carries out reverse charge to coupling capacitance C10, C11, thus reduce the magnitude of voltage of the DC power supply exported outward, the magnitude of voltage of the DC power supply exported outward is stabilized within the scope of setting.
Owing to adding coupling capacitance C10, C11 on transformer B1, effectively increase the modulation width of transformer B1, therefore the scope of power circuit input voltage can be expanded, make the scope of application of power circuit wider, for the input voltage of different size, also can change and the stable DC power supply of output multi-channel.
There is air gap or leakage field phenomenon in transformer B1, can cause causing electric loss of energy in electric energy transfer process, and on transformer B1, add coupling capacitance C10, C11 can solve this problem.
The first, the electric energy being stored in transformer B1 primary coil improves the magnitude of voltage of the DC power supply exported outward by coupling capacitance C10, C11 when the Q2 conducting of switch mosfet pipe;
Second, the electric energy being stored in transformer B1 secondary coil can carry out reverse charge to coupling capacitance C10, C11 when switch mosfet pipe Q2 closes, when the Q2 conducting of switch mosfet pipe, the electric energy be stored on coupling capacitance C10, C11 just can promote the magnitude of voltage of the DC power supply exported outward.
No matter be which kind of above-mentioned mode, all fully the script electric energy be lost in inside transformer B1 used fully, avoid the loss and waste of electric energy, improve conversion efficiency.
Transformer 3 exports two-way DC power supply outward, and the two-way DC power supply that transformer 3 exports outward comprises a road and exports as the DC power supply of+15V and a road export DC power supply for-15V.Described transformer B1 adopts the transformer of 1:1, the secondary coil of transformer B1 exports two-way DC power supply outward by current rectifying and wave filtering circuit 8, and described current rectifying and wave filtering circuit 8 comprises diode D1 and D5, inductance L 4, L5 and L6, electric capacity C24, C1, C2, C3, C4, C5, C13, C34 and C35.
Filter circuit 5 and PWM controller 1 are provided with overvoltage/under-voltage protecting circuit 6; the output of filter circuit 5 connects the input of overvoltage/under-voltage protecting circuit 6; the output of overvoltage/under-voltage protecting circuit 6 is connected with the input of PWM controller 1; overvoltage/under-voltage protecting circuit 6 is being set in the voltage control being input to PWM controller 1 within value range, is input to the voltage control of PWM controller 1 in the present embodiment between 6V to 34V.Described overvoltage/under-voltage protecting circuit 6 comprises resistance R3, R18, R14 and R12, electric capacity C25 and C26.
Be provided with reverse-connection preventing circuit 7 between the DC power supply of outside input and PWM controller 1, described reverse-connection preventing circuit 7 comprises switch mosfet pipe Q1, voltage stabilizing didoe DW1 and resistance R1.
Above embodiment is better embodiment of the present invention; but embodiments of the present invention are not limited thereto; other are any do not deviate from Spirit Essence of the present invention and principle under do change, modification, substitute, combine, simplify; be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (6)
1. the power circuit of an electric vehicle motor controller, comprise PWM controller (1), switching circuit (2), transformer (3) and feedback circuit (4), the DC power supply that PWM controller (1) inputs with transformer (3) and outside is connected, PWM controller (1) is by the operation of switching circuit (2) control transformer (3), transformer (3) exports at least one road DC power supply outward, feedback circuit (4) detects the voltage signal of the DC power supply that transformer exports outward and the voltage signal detected is delivered to PWM controller (1), it is characterized in that: between the primary coil of transformer (3) and secondary coil, be connected with coupling capacitance (C10, C11).
2. the power circuit of a kind of electric vehicle motor controller according to claim 1, it is characterized in that: described switching circuit (2) adopts switch mosfet pipe, the output of PWM controller (1) is connected by switch mosfet pipe one end with transformer (3) primary coil, and the other end of transformer (3) primary coil is connected with the DC power supply that outside inputs by filter circuit (5).
3. the power circuit of a kind of electric vehicle motor controller according to claim 2, it is characterized in that: one end of coupling capacitance (C10, C11) is connected between switch mosfet pipe and transformer (3) primary coil, and the other end is connected with transformer (3) secondary coil.
4. the power circuit of a kind of electric vehicle motor controller according to Claims 2 or 3, it is characterized in that: transformer (3) exports two-way DC power supply outward, the two-way DC power supply that transformer (3) exports outward comprises a road and exports as the DC power supply of positive voltage and a road export DC power supply for negative voltage.
5. the power circuit of a kind of electric vehicle motor controller according to claim 4; it is characterized in that: filter circuit (5) and PWM controller (1) are provided with overvoltage/under-voltage protecting circuit (6); the output of filter circuit (5) connects the input of overvoltage/under-voltage protecting circuit (6); the output of overvoltage/under-voltage protecting circuit (6) is connected with the input of PWM controller (1), and overvoltage/under-voltage protecting circuit (6) is being set in the voltage control being input to PWM controller (1) within value range.
6. the power circuit of a kind of electric vehicle motor controller according to claim 5, is characterized in that: be provided with reverse-connection preventing circuit (7) between the DC power supply of outside input and PWM controller (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420680132.9U CN204205999U (en) | 2014-11-07 | 2014-11-07 | A kind of power circuit of electric vehicle motor controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420680132.9U CN204205999U (en) | 2014-11-07 | 2014-11-07 | A kind of power circuit of electric vehicle motor controller |
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| Publication Number | Publication Date |
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| CN204205999U true CN204205999U (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420680132.9U Active CN204205999U (en) | 2014-11-07 | 2014-11-07 | A kind of power circuit of electric vehicle motor controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821634A (en) * | 2015-05-26 | 2015-08-05 | 黑龙江大学 | Lithium battery multiple-path low-voltage DC power supply system with electric quantity detection and method for realizing electric quantity detection by utilizing same |
-
2014
- 2014-11-07 CN CN201420680132.9U patent/CN204205999U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821634A (en) * | 2015-05-26 | 2015-08-05 | 黑龙江大学 | Lithium battery multiple-path low-voltage DC power supply system with electric quantity detection and method for realizing electric quantity detection by utilizing same |
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