CN209358436U - A kind of sepic converter for electric machine controller auxiliary power supply - Google Patents
A kind of sepic converter for electric machine controller auxiliary power supply Download PDFInfo
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- CN209358436U CN209358436U CN201822242601.XU CN201822242601U CN209358436U CN 209358436 U CN209358436 U CN 209358436U CN 201822242601 U CN201822242601 U CN 201822242601U CN 209358436 U CN209358436 U CN 209358436U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model discloses a kind of sepic converter for electric machine controller auxiliary power supply, the utility model includes input protection circuit, circuit for power conversion, enabled and under-voltage protecting circuit, start-up circuit, control circuit, LDO output circuit.This converter has wide input voltage range (8 ~ 100VDC), enabled and undervoltage turnoff function, multiple-channel output meets the needs of electric machine controller multiple voltage rail, sleep mode, which may be implemented, by enabled end interface simultaneously reduces system power dissipation, sepic converter is simple compared to the design of other multiple-channel outputs DC converter inductance, since the presence of coupled capacitor there are lower running noises, the EMI performance of electric machine controller is helped to improve.
Description
Technical field
The utility model relates to converter technology fields, and in particular to a kind of for the single-ended of electric machine controller auxiliary power supply
Primary inductance converter.
Background technique
Electric car is fast-developing in recent years, inside have the big function such as numerous electronic equipments, especially electric machine controller
Each multiple Voltage rails of component need of work inside rate equipment.However, general automotive interior only has a kind of low pressure of auxiliary power supply to store
Battery, generally 12V/24V battery.Therefore each equipment must integrate one or more electric pressure converters, to guarantee internal device
The normal work of part.
Utility model content
Technical problem to be solved by the utility model is: provide a kind of output of multiple voltage for electric machine controller
The single ended primary induction of auxiliary power supply summons device to court.
To solve the above-mentioned problems, the utility model includes input protection circuit, circuit for power conversion, enabled and under-voltage guarantor
Protection circuit, start-up circuit, control circuit, LDO output circuit.
Specifically, input protection circuit described in the utility model includes battery, fuse, PMOS switch pipe, pressure stabilizing two
Pole pipe and resistance, the anode of the D grade connection battery of PMOS switch pipe, the S grade of PMOS switch pipe are VS output end, battery cathode,
Resistance, zener diode are sequentially connected, and resistance is connected to the anode of zener diode, the cathode and VS output end of zener diode
Connection, battery cathode ground connection, the fuse are connected between anode and the D grade of PMOS switch pipe.
Specifically, the utility model is enabled and under-voltage protecting circuit includes signal input part, the first NPN transistor, second
The pole b of NPN transistor, the first zener diode, the second zener diode and several resistance, the first NPN transistor passes through first
The pole c of the connection of the VS output end of zener diode and a resistance and input protection circuit, the second NPN transistor passes through an electricity
Resistance is connect with signal input part, and the pole e of the first NPN transistor is connect with the c of the second NPN transistor grade, the first NPN transistor
C extremely output end, and by a resistance connection between the grade and VS output end, the pole e of the second NPN transistor and signal input
By a resistance connection between end, the pole e of the second NPN transistor is connect by the second zener diode with output end, and first
Pass through a resistance connection between the pole b of NPN transistor and the anode of the second zener diode.
Specifically, start-up circuit described in the utility model include diode, zener diode, PNP transistor, resistance and
Capacitor, the anode of the diode are connected with+15v voltage, and the pole c of PNP transistor and b are extremely protected by resistor coupled in parallel in input
The VS output end of protection circuit, the output end in parallel for start-up circuit between the cathode of diode and the pole e of PNP transistor, PNP are brilliant
By zener diode and a capacitance connection between the pole b of body pipe and the output end of start-up circuit, and zener diode is negative
Pole be connected to the b of PNP transistor extremely on.
Specifically, control circuit described in the utility model includes the control chip of model TPS40210, the starting
The output end of circuit is connected to the VDD pin of control chip, and the output end of start-up circuit is connected to control core by a resistance
The RC pin of piece controls between the RC pin of chip and SS pin through two concatenated capacitance connections, enabled and under-voltage protection
The output end of circuit be connected to control chip /end EN, the COMP and FB for controlling chip be connected with electricity by signal feedback circuit
Feedback input end is pressed, controls and passes through a capacitance connection between the EPAD pin of chip and ISNS pin, and EPAD pin, ISNS
Pin and GND pin earth control the BP of chip by a capacity earth, control the GDRV pin of chip as output
End, current signal collection terminal of the ISNS pin as circuit for power conversion.
Specifically, circuit for power conversion described in the utility model includes mos power switch, Multiple coil coupling inductance and whole
Flow diode, the Multiple coil coupling inductance include the first inductance, the second inductance and third inductance, second inductance and
Third inductance is the coupling inductance of the first inductance, and one end of the first inductance is connect with the VS output end of protection circuit, the first electricity
The other end of sense is connect with the pole D of mos power switch, and the pole G of mos power switch is connect with the GDRV pin of control chip, mos
The pole S of power switch is by a resistance eutral grounding, and ISNS pin is connected to the pole S of mos power switch between resistance, and second
Inductance one end ground connection, the other end of the second inductance are sequentially connected transformer and rectifier diode as the first output end, mos power
The pole D of switch is connect by capacitor with transformer, and the first output end controls the Voltage Feedback input terminal of chip as connection simultaneously
Input terminal, the first output end is parallel with coupled capacitor and is grounded, one end ground connection of the third inductance, third inductance
The other end is connected with rectifier diode, inductance coil, LDO voltage regulator circuit in turn as second output terminal, rectifier diode, inductance
Coil, LDO voltage regulator circuit cathode pass through filter capacitor be grounded.
The beneficial effects of the utility model are: 1, the utility model circuit for power conversion, using SEPIC topology, inductance uses
The basic constitutional unit of coupling inductance mode, the first inductance and the second inductance as composition SEPIC topology, third inductance is as volume
Outer secondary output winding, three inductance can be wound on the same magnetic core, space be saved, due to coupled capacitor in circuit
The first inductance of C29 connection and the second inductance, switching noise caused by being can be absorbed in switching process because of winding stray inductance, phase
Than thering is apparent EMI to be promoted in other converter topologies, and do not need to add additional noise absorbing circuit.
2, the utility model start-up circuit is not only that control chip provides necessary starting voltage, while by voltage clamping one
A safe voltage operating point may be implemented Width funtion input (8-100VDC), meet different vehicle-mounted low-pressure system (12V/
24V).
3, the utility model is enabled provides two kinds of functions with under-voltage protecting circuit, and one is enabled effect, by defeated
The control for entering signal makes converter enter dormant state and achievees the purpose that low-power consumption；Secondly being under-voltage protection function, when voltage is low
Converter output is turned off when setting value, is protected supplying cell, be to avoid feed situation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of input protection circuit；
Fig. 3 is the enabled structural schematic diagram with under-voltage protecting circuit；
Fig. 4 is the structural schematic diagram of start-up circuit；
Fig. 5 is the structural schematic diagram of control circuit；
Fig. 6 is the structural schematic diagram of circuit for power conversion.
Specific embodiment
Sepic converter for electric machine controller auxiliary power supply as shown in Figure 1, including input protection electricity
Road, circuit for power conversion, enabled and under-voltage protecting circuit, start-up circuit, control circuit, LDO output circuit, the LDO.Such as
Shown in Fig. 2, the input protection circuit includes battery, fuse F1, PMOS switch pipe Q6, zener diode D12 and resistance
The anode of the D grade connection battery of R26, PMOS switch pipe Q6, the S grade of PMOS switch pipe Q6 is VS output end, battery cathode, resistance
R26, zener diode D12 are sequentially connected, and resistance R26 is connected to the anode of zener diode D12, and zener diode D12's is negative
Pole is connect with VS output end, and battery cathode ground connection, the fuse F1 is connected to anode and the D grade of PMOS switch pipe Q6
Between.Input protection circuit provides input voltage and electric current for late-class circuit, while having short-circuit protection, anti-reverse defencive function.
As shown in figure 3, the enabled and under-voltage protecting circuit of the present embodiment includes signal input part KEY, the first NPN transistor
Q7, the second NPN transistor Q8, the first zener diode D10, the second zener diode D13 and several resistance, the first NPN crystal
The pole b of pipe Q7 is connected by the VS output end of the first zener diode D10 and resistance R25 and input protection circuit, and the 2nd NPN is brilliant
The pole c of body pipe Q8 is connect by resistance R24 with signal input part, the pole e of the first NPN transistor Q7 and the second NPN transistor Q8
The connection of c grade, the pole c of the first NPN transistor Q7 connected as output end, and between the grade and VS output end by resistance R28,
It is connected between the pole e and signal input part of second NPN transistor Q8 by resistance R23, the pole e of the second NPN transistor Q8 passes through
Second zener diode D13 is connect with output end, the anode of the pole b of the first NPN transistor Q7 and the second zener diode D13
Between connected by resistance R27.When the VS output end of input protection circuit is greater than the reverse withstand voltage of the first zener diode D10, the
One NPN transistor Q7 is opened, if signal input part KEY is applied high level signal, the second NPN transistor Q8 while quilt at this time
It opens, then enables to be pulled low with the level of the output end of under-voltage protecting circuit, low level signal is applied to the control of TPS40210
On chip on enable end, it is made to be activated.
As shown in figure 4, start-up circuit described in the present embodiment includes diode D9, zener diode D11, PNP transistor
Q5, resistance and capacitor, the anode of the diode D9 are connected with+15v voltage, and the pole c and the pole b of PNP transistor Q5 passes through respectively
Resistance R21 and resistance R22 is connected in parallel on the VS output end of input protection circuit, the cathode of diode D9 and the pole e of PNP transistor Q5
Between it is in parallel be start-up circuit output end, pass through two pole of pressure stabilizing between the pole b of PNP transistor Q5 and the output end of start-up circuit
Pipe D11 is connected with capacitor C24, and the cathode of zener diode D11 be connected to the b of PNP transistor Q5 extremely on.Start-up circuit is control
The control chip of circuit processed provides normal working voltage.
As shown in figure 5, control circuit described in the present embodiment includes the control chip of model TPS40210, the starting
The output end of circuit is connected to the VDD pin of control chip U3, and the output end of start-up circuit is connected to control core by resistance R33
The RC pin of piece U3 controls between the RC pin of chip and SS pin through concatenated capacitor C26 and C27 connection, it is enabled with it is deficient
The output end of voltage protection circuit be connected to control chip U3 /end EN, the COMP and FB for controlling chip pass through signal feedback circuit
It is connected with Voltage Feedback input terminal, controls and is connected between the EPAD pin and ISNS pin of chip U3 by capacitor C31, and EPAD
The BP pin of pin, ISNS pin and GND pin earth, control chip U3 is grounded by capacitor C30, control chip U3's
GDRV pin is as output end PWM, current signal collection terminal of the ISNS pin as circuit for power conversion.
As shown in fig. 6, circuit for power conversion described in the present embodiment includes mos power switch Q9, Multiple coil coupling inductance
With rectifier diode D14 and D15, the Multiple coil coupling inductance includes the first inductance L1, the second inductance L2 and third inductance
L3, the second inductance L2 and third inductance L3 are the coupling inductance of the first inductance L1, one end of the first inductance L1 and guarantor
The VS output end of protection circuit connects, and the other end of the first inductance L1 is connect with the pole D of mos power switch Q9, mos power switch Q9
The pole G with control chip output end PWM connect, the pole S of mos power switch Q9 is grounded by resistance R31, and ISNS pin company
It connects between the pole S and resistance R31 of mos power switch Q9, second one end inductance L2 ground connection, the other end of the second inductance L2 is successively
Transformer T3 and rectifier diode D15 is connected as the first output end, the pole D of mos power switch Q9 by coupled capacitor C29 with
Transformer T3 connection, the first output end control the input terminal of the Voltage Feedback input terminal of chip, the first output as connection simultaneously
End is parallel with coupled capacitor CE3 and is grounded, and one end ground connection of the third inductance L3, the other end of third inductance L3 is successively
Rectifier diode D14, inductance coil L2, LDO voltage regulator circuit are connected with as second output terminal, rectifier diode D14, inductor wire
Circle L2, LDO voltage regulator circuit passes through filter capacitor C32, C33, C34 ground connection respectively.
Control chip U3 work is activated when EN signal is low level, it is defeated that control chip U3 on the contrary enters dormant state closing
Out.Output end PWM exports the pwm signal of fixed frequency, and for controlling the mos power switch Q9 of circuit for power conversion, ISNS draws
Foot is used to acquire the electric current of circuit for power conversion R31, protects for power.First output end and second output terminal are motor control
Other devices provide input inside device.
Above-mentioned specific embodiment is only the specific case of the utility model, and the scope of patent protection of the utility model includes
But it is not limited to the product form and style of above-mentioned specific embodiment, it is any to meet the utility model claims book and any institute
Belong to the appropriate changes or modifications that the those of ordinary skill of technical field does it, should all fall into the patent protection of the utility model
Range.
Claims (1)
1. a kind of sepic converter for electric machine controller auxiliary power supply, it is characterised in that: protected including input
Circuit, circuit for power conversion, enabled and under-voltage protecting circuit, start-up circuit, control circuit, LDO output circuit；The input
Protection circuit includes battery, fuse, PMOS switch pipe, zener diode and resistance, and the D grade of PMOS switch pipe connects battery
The S grade of anode, PMOS switch pipe is VS output end, and battery cathode, resistance, zener diode are sequentially connected, and resistance is connected to surely
The anode of diode is pressed, the cathode of zener diode is connect with VS output end, and battery cathode ground connection, the fuse is connected to electricity
Between pond anode and the D grade of PMOS switch pipe；Enabled includes signal input part, the first NPN transistor, the with under-voltage protecting circuit
Two NPN transistors, the first zener diode, the second zener diode and several resistance, the pole b of the first NPN transistor pass through the
The pole c of the connection of the VS output end of one zener diode and a resistance and input protection circuit, the second NPN transistor passes through one
Resistance is connect with signal input part, and the pole e of the first NPN transistor is connect with the c of the second NPN transistor grade, the first NPN transistor
C extremely output end, and by the connection of resistance between the grade and VS output end, the pole e of the second NPN transistor and signal are defeated
Entering by a resistance connection between end, the pole e of the second NPN transistor is connect by the second zener diode with output end, the
Pass through a resistance connection between the pole b of one NPN transistor and the anode of the second zener diode；The start-up circuit includes
Diode, zener diode, PNP transistor, resistance and capacitor, the anode of the diode are connected with+15v voltage, PNP crystal
The pole c of pipe and b extremely pass through resistor coupled in parallel in the VS output end of input protection circuit, the cathode of diode and the e of PNP transistor
The output end in parallel for start-up circuit, passes through two pole of pressure stabilizing between pole between the pole b of PNP transistor and the output end of start-up circuit
Pipe and a capacitance connection, and the cathode of zener diode be connected to the b of PNP transistor extremely on；The control circuit includes type
Number be TPS40210 control chip, the output end of the start-up circuit be connected to control chip VDD pin, start-up circuit
Output end the RC pin of control chip is connected to by a resistance, control between the RC pin of chip and SS pin by two
A concatenated capacitance connection, the enabled output end with under-voltage protecting circuit be connected to control chip /end EN, control chip
COMP and FB is connected with Voltage Feedback input terminal by signal feedback circuit, controls between the EPAD pin of chip and ISNS pin
By a capacitance connection, and EPAD pin, ISNS pin and GND pin earth, the BP for controlling chip pass through an electricity
Hold ground connection, controls the GDRV pin of chip as output end, current signal collection terminal of the ISNS pin as circuit for power conversion；
The circuit for power conversion includes mos power switch, Multiple coil coupling inductance and rectifier diode, the Multiple coil coupling
Inductance includes the first inductance, the second inductance and third inductance, and second inductance and third inductance are the coupling of the first inductance
Inductance is closed, one end of the first inductance is connect with the VS output end of protection circuit, the other end and the mos power switch of the first inductance
The pole G of the connection of the pole D, mos power switch is connect with the GDRV pin of control chip, and the pole S of mos power switch passes through a resistance
Ground connection, and ISNS pin is connected to the pole S of mos power switch between resistance, second inductance one end ground connection, the second inductance it is another
One end is sequentially connected transformer and rectifier diode as the first output end, and the pole D of mos power switch by coupled capacitor and becomes
Depressor connection, the first output end control the input terminal of the Voltage Feedback input terminal of chip as connection simultaneously, and the first output end is simultaneously
It is associated with coupled capacitor to be grounded, one end ground connection of the third inductance, the other end of third inductance is connected with rectification in turn
Diode, inductance coil, LDO voltage regulator circuit as second output terminal, rectifier diode, inductance coil, LDO voltage regulator circuit it is negative
Extremely it is grounded by filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822242601.XU CN209358436U (en) | 2018-12-29 | 2018-12-29 | A kind of sepic converter for electric machine controller auxiliary power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822242601.XU CN209358436U (en) | 2018-12-29 | 2018-12-29 | A kind of sepic converter for electric machine controller auxiliary power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209358436U true CN209358436U (en) | 2019-09-06 |
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ID=67801362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822242601.XU Active CN209358436U (en) | 2018-12-29 | 2018-12-29 | A kind of sepic converter for electric machine controller auxiliary power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209358436U (en) |
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2018
- 2018-12-29 CN CN201822242601.XU patent/CN209358436U/en active Active
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