CN105471290B - Diesel engine variable voltage rectifier - Google Patents
Diesel engine variable voltage rectifier Download PDFInfo
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- CN105471290B CN105471290B CN201511005855.4A CN201511005855A CN105471290B CN 105471290 B CN105471290 B CN 105471290B CN 201511005855 A CN201511005855 A CN 201511005855A CN 105471290 B CN105471290 B CN 105471290B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of diesel engine variable voltage rectifiers, including switching power circuit, bypass power supply circuit and bypass control circuit, the switching power circuit is used to after the voltage that charge coil exports is carried out voltage regulating rectifier export, the bypass power supply circuit is used to after the voltage that charge coil exports is carried out rectifying and wave-filtering export, the bypass control circuit is used to detect the output voltage of bypass power supply circuit, and be compared the output voltage detected with setting value, disconnect bypass power supply circuit.This variable voltage rectifier input voltage range is big; output voltage ripple is small; when input voltage is less than setting output voltage; the voltage lower than setting value can directly be exported; effective solution diesel engine on startup can not start or start in the case of no storage battery after can not automatic protection function; storage battery charging quality is improved simultaneously, improves storage battery service life.
Description
Technical field
The present invention relates to diesel engine arts, more particularly to a kind of diesel engine variable voltage rectifier.
Background technology
Existing small air-cooled diesel engine is mainly flame-out using mechanical injection pump oil-break, and oil-break mode mainly has：1. throttle
Combination controls injection pump, and 2. injection pump carries electromagnetic valve switch.
Electromagnetic valve switch state is carried in injection pump, diesel engine must could open solenoid valve in the state of equipped with storage battery
Switch starts, and should must have storage battery when the disadvantage is that starting, or open electromagnetic valve switch using mechanical system manually and start, because of hand
Dynamic to open electromagnetic valve switch startup using mechanical system, this is a pressure action, if inartificial homing action, the switch
Meeting positive opening always, electromagnetic valve switch will lose function, complicated for operation, and can not achieve automatic protection work(in normal work
Energy.
Existing variable voltage rectifier input voltage range is small, and output voltage ripple is big, and rush of current is big when charging to storage battery,
The storage battery service life can be shortened.
Invention content
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of diesel engine variable voltage rectifier, this pressure regulation is whole
Stream device input voltage range is big, and output voltage ripple is small, when input voltage is less than setting output voltage, can directly export than setting
It is worth low voltage, effective solution diesel engine can not be automatic after can not starting or start in the case of no storage battery on startup
The function of protection, while storage battery charging quality is improved, improve storage battery service life.
The object of the present invention is achieved like this：A kind of diesel engine variable voltage rectifier, including switching power circuit, bypass supply
Circuit and bypass control circuit, after the voltage that the switching power circuit is used to export charge coil carries out voltage regulating rectifier
Output, the bypass power supply circuit are used to after the voltage that charge coil exports is carried out rectifying and wave-filtering export, the Bypass Control
Circuit is used to detect the output voltage of bypass power supply circuit, and the output voltage detected is compared with setting value, disconnects
Bypass power supply circuit.
The bypass power supply circuit includes the 10th diode D10, the 11st diode D11 and the 5th filter capacitor C5, and described the
The anode of 10 diode D10 is connect with the first input interface of variable voltage rectifier, the anode of the 11st diode D11 and pressure regulation
Second input interface of rectifier connects, and the cathode of the 10th diode D10, the cathode of the 11st diode D11 are filtered with the 5th
The anode connection of wave capacitance C5, the anode of the 5th filter capacitor C5 are connect with the first output interface P1 of variable voltage rectifier.Institute
The cathode for stating the 5th filter capacitor C5 is connect with the second output interface P3 of variable voltage rectifier respectively.The both ends of 5th filter capacitor C5
It is parallel with resistance R51K.The 3rd diode D3 is equipped between two output interfaces of variable voltage rectifier, the 3rd diode D3's
Anode is connect with the second output interface P3 of variable voltage rectifier, the cathode of the 3rd diode D3 and the first of variable voltage rectifier
Output interface P1 connections.
The bypass control circuit includes the 4th switching tube Q4, the 2nd switching tube Q2, the 2nd voltage-stabiliser tube DW2, the 4th switch
The base stage of pipe Q4 is connect with one end of the 23rd resistance R23, the other end ground connection of the 23rd resistance R23, the base of the 4th switching tube Q4
Pole is connected through the first output interface of resistance and variable voltage rectifier, and the emitter ground connection of the 4th switching tube Q4, the described 4th opens
The collector for closing pipe Q4 connects with one end of the cathode of the 2nd voltage-stabiliser tube DW2, one end of the 10th resistance R10, the 20th resistance R20 respectively
It connects, the plus earth of the 2nd voltage-stabiliser tube DW2, the other end of the 10th resistance R10 and the first output interface of variable voltage rectifier connect
It connects, the other end of the 20th resistance R20 is connect with the grid of the 2nd switching tube Q2, the source electrode ground connection of the 2nd switching tube Q2, described
The drain electrode of 2nd switching tube Q2 and the second output interface P3 connections of variable voltage rectifier.
The switching power circuit includes power circuit, input rectifying filter circuit, power conversion circuit, PWM control electricity
Road, output rectifier and filter, voltage feedback circuit, current sampling circuit, the power circuit are used to supply for pwm control circuit
Electricity, the input terminal of the input rectifying filter circuit and the input interface of variable voltage rectifier connect, the input rectifying filtered electrical
The output end on road and the input terminal of power conversion circuit connect, and output end and the output rectifier and filter of power conversion circuit connect
It connects, the input terminal of the voltage feedback circuit and the output end of current rectifying and wave filtering circuit connect, the output of the voltage feedback circuit
End is connect with the first input end of pwm control circuit, and the input terminal of the current sampling circuit is connect with power conversion circuit, institute
State current sampling circuit output end and pwm control circuit the second input terminal connect, the output end of the pwm control circuit with
Power conversion circuit connects.
The 2nd two pole is equipped between first output end of the switching power circuit and the first output interface of variable voltage rectifier
The anode of pipe D2, the 2nd diode D2 are connect with the first output end of switching power circuit, and the 2nd diode D2's is negative
First output interface of pole and variable voltage rectifier connects.
The input rectifying filter circuit includes rectifier bridge stack D4 and the 4th filter capacitor C4, and the two of the rectifier bridge stack D4
A input terminal is connect with two input interfaces of variable voltage rectifier respectively, the first output end ground connection of the rectifier bridge stack D4, institute
State the second output terminal of rectifier bridge stack D4 respectively with the anode of the 4th filter capacitor C4, the armature winding of high frequency transformer B1
One end connects, the cathode ground connection of the 4th filter capacitor C4.
The power conversion circuit includes high frequency transformer B1, the 1st switching tube Q1.High frequency transformer B1 be equipped with it is primary around
Group, secondary windings, control power supply winding.The drain electrode of the second end of the armature winding of high frequency transformer B1 and the 1st switching tube Q1, RC
The input terminal of current rectifying and wave filtering circuit connects, the output end output with input rectifying filter circuit respectively of RC current rectifying and wave filtering circuits
It holds, the connection of the first end of the armature winding of high frequency transformer B1, secondary windings and the output rectification filter electricity of high frequency transformer B1
The input terminal on road connects, the source electrode of the 1st switching tube Q1 respectively with one end of the 18th resistance R18, the 14th resistance R14 one
The anode connection at end, the 4th voltage-stabiliser tube DW4, the other end ground connection of the 18th resistance R18, the other end of the 14th resistance R14, the 4th
The cathode of voltage-stabiliser tube DW4 is connect with the grid of the 1st switching tube Q1, and the grid of the 1st switching tube Q1 is through the 13rd resistance R13 and PWM
The output end of chip U1 connects.The source electrode of the 1st switching tube Q1 is connect with one end of the 22nd resistance R22, the 22nd resistance R22's
The other end is connect with the ends ISEN of one end of the 10th capacitance C10, PWM chip U1 respectively, the other end ground connection of the 10th capacitance C10.
The RC current rectifying and wave filtering circuits include the 5th diode D5, the 4th resistance R4, the 2nd capacitance C2, the 5th diode D5
Anode connect respectively with the drain electrode of the second end of the armature winding of high frequency transformer B1, the 1st switching tube Q1, the 5th diode D5
Cathode connect respectively with one end of one end of the 4th resistance R4, the 2nd capacitance C2, the other end of the 4th resistance R4, the 2nd capacitance C2
The other end is connect with the first end of the output end of input rectifying filter circuit, the armature winding of high frequency transformer B1.
The output rectifier and filter includes the 1st diode D1, the 3rd filter capacitor C3, and the 1st diode D1 is just
Pole is connect with the secondary windings second end of high frequency transformer B1, the cathode of the 1st diode D1 respectively with the 3rd filter capacitor C3
Anode, the 5th resistance R5 one end connection, the cathode of the 3rd filter capacitor C3, the other end of the 5th resistance R5, high frequency transformation
The first end of the secondary windings of device B1 is all connected with reference ground.The output rectifier and filter further includes the 1st resistance R1, the 1st electricity
Hold C1, the 1st resistance R1 is in parallel with the 1st diode D1 after connecting with the 1st capacitance C1.
The voltage feedback circuit includes the 7th resistance R7, photoelectrical coupler IC1, the 1st voltage-stabiliser tube DW1, the 7th resistance
One end of R7 and the output end of output rectifier and filter connect, and the other end of the 7th resistance R7 is with photoelectrical coupler IC1's
First input end connects, and the second input terminal of the photoelectrical coupler IC1 is connect with the cathode of the 1st voltage-stabiliser tube DW1, and the described 1st
The anode connection reference ground of voltage-stabiliser tube DW1.Voltage-stabiliser tube DW1 determines the size of output voltage.The photoelectrical coupler（IC1）It is defeated
Outlet is connect with pwm control circuit.The first output end of the photoelectrical coupler IC1 is connect with the ends COMP of PWM chip U1,
The second output terminal of the photoelectrical coupler IC1 is connect with the base stage of one end of the 21st resistance R21, the 3rd switching tube Q3 respectively, institute
State the other end ground connection of the 21st resistance R21, the emitter ground connection of the 3rd switching tube Q3, the collector difference of the 3rd switching tube Q3
It is connect with the anode of the ends VFB of PWM chip U1, one end of the 15th resistance R15, the 7th capacitance C7, the cathode ground connection of the 7th capacitance C7,
The other end of 15th resistance R15 is connect with the ends VREF of PWM chip U1.The ends VREF of PWM chip U1 and the one of the 16th resistance R16
End connection, the other end of the 16th resistance R16 are connect with one end of the ends RT/CT of PWM chip U1, the 8th capacitance C8 respectively, the 8th electricity
Hold the other end ground connection of C8.
The switching power circuit is equipped with current-limiting circuit, for preferably limiting maximum output current, protection storage battery because
Electric current is excessive to be caused to damage.
The current-limiting circuit includes photoelectrical coupler IC1, the first a reference source D12, the 30th resistance R30, the photoelectric coupling
The output end of device IC1 is connect with pwm control circuit, and the first input end of the photoelectrical coupler IC1 is through the 7th resistance R7 and output
The output end of current rectifying and wave filtering circuit connects, and the cathode of the second input terminal of the photoelectrical coupler IC1 and the first a reference source D12 connect
It connects, the anode of the first a reference source D12 connects reference ground, and the reference edge of the first a reference source D12 is respectively with the 28th resistance R28's
One end connection of one end, one end of the 29th resistance R29, the 13rd capacitance C13, the other end connection reference of the 13rd capacitance C13
The other end on ground, the 29th resistance R29 connects with the second output interface of one end of the 30th resistance R30, variable voltage rectifier respectively
It connecing, the other end of the 30th resistance R30 connects reference ground, the other end of the 28th resistance R28 and one end of the 25th resistance R25,
The cathode connection of one end of the 26th resistance R26, the anode of the 12nd capacitance C12, the second a reference source D13, the 12nd capacitance C12's is negative
Pole, the second a reference source D13 anode be all connected with reference ground, the other end of the 26th resistance R26 respectively with the 27th resistance R27 one
The reference edge connection at end, the second a reference source D13, the other end of the 27th resistance R27 connect reference ground, and the 25th resistance R25's is another
End is connect with the output end of output rectifier and filter.
The power circuit includes start-up circuit and PWM power supply circuits, the input terminal and input rectifying of the start-up circuit
The output end of filter circuit connects, and the output end of the start-up circuit and the power end of pwm control circuit connect, and the PWM is supplied
The control power supply winding of the input terminal of circuit and the high frequency transformer of power conversion circuit connects, the PWM power supply circuits
The power end of output end and pwm control circuit connects.The start-up circuit includes the 2nd resistance R2, the 3rd resistance R3, the 11st resistance
R11, the 12nd resistance R12, the 2nd resistance R2 is in parallel with the 3rd resistance R3, and the 11st resistance R11 and the 12nd resistance R12 is simultaneously
Connection, one end of the 2nd resistance R2 connect with the output end of input rectifying filter circuit, the other end of the 2nd resistance R2 and
One end of 11st resistance R11 connects, and the other end of the 11st resistance R11 and the power end of pwm control circuit connect.The PWM is supplied
Circuit includes the 8th diode D8, the 6th filter capacitor C6, the 3rd voltage-stabiliser tube DW3, the anode and high frequency of the 8th diode D8
The second end connection of the control power supply winding of transformer, the cathode of the 8th diode D8 are connect with one end of the 17th resistance R17, the
The other end of 17 resistance R17 respectively with one end of the 19th resistance R19, the anode of the 6th filter capacitor C6, the 11st capacitance C11 one
The cathode connection at end, the 3rd voltage-stabiliser tube DW3, the cathode of the 6th filter capacitor C6, the other end, the 3rd voltage-stabiliser tube of the 11st capacitance C11
The anode of DW3, the control power supply winding of high frequency transformer first end be grounded, the other end of the 19th resistance R19 is controlled with PWM
The power end of circuit connects.
Beneficial effects of the present invention are：The included charge coil of diesel engine output voltage in the case where starting rotating speed is very low, cannot
Enough switching power circuit is allowed to start, therefore the present invention designs bypass power supply circuit, in diesel engine starting, passes through bypass power supply electricity
Road powers to electromagnetic valve switch, and bypass power supply circuit of the invention improves the output voltage started under rotating speed, meets and starts rotating speed
Lower electromagnetic valve switch（The operating voltage of electromagnetic valve switch is in DC8V ~ 15V）Normal work.Voltage increases after start completion, when
When bypass power supply circuit output voltage reaches setting value, bypass control circuit controls bypass power supply circuit and disconnects, at this point, charging wire
Circle provides voltage in diesel engine operating rotational speed range to switching power circuit, charges for electrical appliance and storage battery after voltage regulating rectifier
Power supply is provided.Using the above structure so that the electricity that variable voltage rectifier of the invention can directly export charge coil on startup
Pressure uses after bypass power supply circuit rectifies for solenoid valve, when diesel engine is worked normally to the voltage of charge coil output through opening
It is solenoid valve power supply and storage battery charging after powered-down source circuit voltage regulating rectifier.It is to solve generator to design bypass power supply circuit
When startup, the idle state of fuel solenoid valve.
The present invention is not required to artificially open the action of electromagnetic valve switch, and upon start up, the charge coil of diesel engine itself will
Output voltage for electromagnetic valve switch provides power supply after being handled by variable voltage rectifier, opens electromagnetic valve switch, makes diesel engine normal
Work, when engine oil pressure occurs insufficient, oil pressure sensor will realize protection by controlling electromagnetic valve switch on/off.
The variable voltage rectifier switching power circuit using the present invention of the present invention so that variable voltage rectifier input voltage range
Greatly, output voltage ripple is small, when input voltage is less than setting output voltage, can directly export the voltage lower than setting value, effectively
Solve after diesel engine can not start or start in the case of no storage battery on startup can not automatic protection function, simultaneously
Storage battery charging quality is improved, storage battery service life is improved.
Present invention will be further explained below with reference to the attached drawings and specific embodiments.
Description of the drawings
Fig. 1 is the circuit diagram of the diesel engine variable voltage rectifier of the present invention.
Specific implementation mode
Referring to Fig. 1, a kind of diesel engine variable voltage rectifier, including switching power circuit, bypass power supply circuit 2 and bypass control
Circuit 3 processed, the switching power circuit are used to after the voltage that charge coil exports is carried out voltage regulating rectifier export, and the bypass supplies
Circuit is used to after the voltage that charge coil exports is carried out rectifying and wave-filtering export, and the bypass control circuit is bypassed for detecting
The output voltage of power supply circuit, and the output voltage detected is compared with setting value, bypass power supply circuit is disconnected, side is made
Output interface P1, P3 of road power supply circuit and variable voltage rectifier are disconnected.Input interface P2, P4 of variable voltage rectifier connect charging wire
Circle, output interface P1, P3 of variable voltage rectifier are that solenoid valve is powered and storage battery charges.The effect of storage battery be it is electrically actuated be to open
Dynamic motor provides power supply, and when hand starting can not need storage battery.Bypass power supply circuit is mainly used for fuel solenoid valve in generator
It powers when startup.Design bypass power supply circuit is fuel solenoid valve idle state when starting to solve generator.
The bypass power supply circuit includes the 10th diode D10, the 11st diode D11 and the 5th filter capacitor C5, and described the
The anode of 10 diode D10 is connect with the first input interface of variable voltage rectifier, the anode of the 11st diode D11 and pressure regulation
Second input interface of rectifier connects, and the cathode of the 10th diode D10, the cathode of the 11st diode D11 are filtered with the 5th
The anode connection of wave capacitance C5.The anode of the 5th filter capacitor C5 is connect with the first output interface P1 of variable voltage rectifier.Institute
The cathode for stating the 5th filter capacitor C5 is connect with the second output interface P3 of variable voltage rectifier respectively.The both ends of 5th filter capacitor C5
It is parallel with resistance R51K.Resistance R51K is discharged to C5.The 3rd diode is equipped between two output interfaces of variable voltage rectifier
The anode of D3, the 3rd diode D3 are connect with the second output interface of variable voltage rectifier, the cathode of the 3rd diode D3
It is connect with the first output interface of variable voltage rectifier.D3 is fly-wheel diode, for providing discharge loop to solenoid valve.
The bypass control circuit includes the 4th switching tube Q4, the 2nd switching tube Q2, the 2nd voltage-stabiliser tube DW2, the 4th switch
The base stage of pipe Q4 is connect with one end of the 23rd resistance R23, the other end ground connection of the 23rd resistance R23, the base of the 4th switching tube Q4
Pole is connected through the first output interface of resistance and variable voltage rectifier, and the emitter ground connection of the 4th switching tube Q4, the described 4th opens
The collector for closing pipe Q4 connects with one end of the cathode of the 2nd voltage-stabiliser tube DW2, one end of the 10th resistance R10, the 20th resistance R20 respectively
It connects, the plus earth of the 2nd voltage-stabiliser tube DW2, the other end of the 10th resistance R10 and the first output interface of variable voltage rectifier connect
It connects, the other end of the 20th resistance R20 is connect with the grid of the 2nd switching tube Q2, the source electrode ground connection of the 2nd switching tube Q2, described
The drain electrode of 2nd switching tube Q2 and the second output interface of variable voltage rectifier connect.
The switching power circuit includes power circuit, input rectifying filter circuit 11, power conversion circuit 12, PWM controls
Circuit 13 processed, output rectifier and filter 14, voltage feedback circuit 15, current sampling circuit, the power circuit are used to be PWM
Control circuit is powered, and the input terminal of the input rectifying filter circuit and the input interface of variable voltage rectifier connect, the input
The output end of current rectifying and wave filtering circuit and the input terminal of power conversion circuit connect, output end and the output rectification of power conversion circuit
Filter circuit connects, and the input terminal of the voltage feedback circuit and the output end of current rectifying and wave filtering circuit connect, the Voltage Feedback
The output end of circuit and the first input end of pwm control circuit connect, the input terminal and power conversion of the current sampling circuit
Circuit connects, and the output end of the current sampling circuit and the second input terminal of pwm control circuit connect, the PWM controls electricity
The output end on road is connect with power conversion circuit.
The 2nd diode is equipped between first output end of switching power circuit and the first output interface of variable voltage rectifier
The anode of D2, the 2nd diode D2 are connect with the first output end of switching power circuit, the cathode of the 2nd diode D2
It is connect with the first output interface of variable voltage rectifier.The effect of D2 is to separate switching power circuit and bypass power supply circuit.
The input rectifying filter circuit includes rectifier bridge stack D4 and the 4th filter capacitor C4, and the two of the rectifier bridge stack D4
A input terminal is connect with two input interfaces of variable voltage rectifier respectively, the first output end ground connection of the rectifier bridge stack D4, institute
State the second output terminal of rectifier bridge stack D4 respectively with the anode of the 4th filter capacitor C4, the armature winding of high frequency transformer B1
One end connects, the cathode ground connection of the 4th filter capacitor C4.
The power conversion circuit includes high frequency transformer B1, the 1st switching tube Q1.High frequency transformer B1 be equipped with it is primary around
Group, secondary windings, control power supply winding.The drain electrode of the second end of the armature winding of high frequency transformer B1 and the 1st switching tube Q1, RC
The input terminal of current rectifying and wave filtering circuit connects, the output end output with input rectifying filter circuit respectively of RC current rectifying and wave filtering circuits
It holds, the connection of the first end of the armature winding of high frequency transformer B1, secondary windings and the output rectification filter electricity of high frequency transformer B1
The input terminal on road connects, the source electrode of the 1st switching tube Q1 respectively with one end of the 18th resistance R18, the 14th resistance R14 one
The anode connection at end, the 4th voltage-stabiliser tube DW4, the other end ground connection of the 18th resistance R18, the other end of the 14th resistance R14, the 4th
The cathode of voltage-stabiliser tube DW4 is connect with the grid of the 1st switching tube Q1, and the grid of the 1st switching tube Q1 is through the 13rd resistance R13 and PWM
The output end of chip U1 connects.The source electrode of the 1st switching tube Q1 is connect with one end of the 22nd resistance R22, the 22nd resistance R22's
The other end is connect with the ends ISEN of one end of the 10th capacitance C10, PWM chip U1 respectively, the other end ground connection of the 10th capacitance C10.
DW4's act as protection Q1, prevents overtension between GS, damages Q1.The effect of D9 is to the junction capacity electric discharge of Q1.
Current sampling circuit includes resistance R18, resistance R22, capacitance C10.R18 is sample resistance, and R22 and C10 constitutes one
A RC filters；When the voltage on R18 is more than 1V, just change the duty ratio of PWM, to control entire circuit.
The RC current rectifying and wave filtering circuits include the 5th diode D5, the 4th resistance R4, the 2nd capacitance C2, the 5th diode D5
Anode connect respectively with the drain electrode of the second end of the armature winding of high frequency transformer B1, the 1st switching tube Q1, the 5th diode D5
Cathode connect respectively with one end of one end of the 4th resistance R4, the 2nd capacitance C2, the other end of the 4th resistance R4, the 2nd capacitance C2
The other end is connect with the first end of the output end of input rectifying filter circuit, the armature winding of high frequency transformer B1. D5、R4、
C2's act as releasing energy to transformer, while also achieving the purpose that magnetic field resets.
The output rectifier and filter includes the 1st diode D1, the 3rd filter capacitor C3, and the 1st diode D1 is just
Pole is connect with the secondary windings second end of high frequency transformer B1, the cathode of the 1st diode D1 respectively with the 3rd filter capacitor C3
Anode, the 5th resistance R5 one end connection, the cathode of the 3rd filter capacitor C3, the other end of the 5th resistance R5, high frequency transformation
The first end of the secondary windings of device B1 is all connected with reference ground.The acting as of R5 gives Switching Power Supply band one small load, prevents from switching
Power supply electrifying instant output voltage overshoots.The output rectifier and filter further includes the 1st resistance R1, the 1st capacitance C1, the 1st electricity
Resistance R1 is in parallel with the 1st diode D1 after connecting with the 1st capacitance C1.R1 and C1 forms absorption circuit, absorbs what secondary windings generated
Spike.
The voltage feedback circuit includes the 7th resistance R7, photoelectrical coupler IC1, the 1st voltage-stabiliser tube DW1, the 7th resistance
One end of R7 and the output end of output rectifier and filter connect, and the other end of the 7th resistance R7 is with photoelectrical coupler IC1's
First input end connects, and the second input terminal of the photoelectrical coupler IC1 is connect with the cathode of the 1st voltage-stabiliser tube DW1, and the described 1st
The anode connection reference ground of voltage-stabiliser tube DW1.Voltage-stabiliser tube DW1 determines the size of output voltage.The first of the photoelectrical coupler IC1
Output end is connect with the ends COMP of PWM chip U1, the second output terminal of the photoelectrical coupler IC1 respectively with the 21st resistance R21
One end, the 3rd switching tube Q3 base stage connection, the 21st resistance R21 the other end ground connection, the hair of the 3rd switching tube Q3
Emitter grounding, the collector of the 3rd switching tube Q3 respectively with the ends VFB of PWM chip U1, one end of the 15th resistance R15, the 7th capacitance
The anode connection of C7, the cathode ground connection of the 7th capacitance C7, the other end of the 15th resistance R15 are connect with the ends VREF of PWM chip U1.
The ends VREF of PWM chip U1 are connect with one end of the 16th resistance R16, and the other end of the 16th resistance R16 is respectively with PWM chip U1's
One end connection at the ends RT/CT, the 8th capacitance C8, the other end ground connection of the 8th capacitance C8.
The pwm control circuit uses the PWM chip U1 of model UC3843.
The switching power circuit is equipped with current-limiting circuit 16, for preferably limiting maximum output current, protects storage battery
It is damaged caused by electric current is excessive.
The current-limiting circuit includes photoelectrical coupler IC1, the first a reference source D12, the 30th resistance R30, the photoelectric coupling
The output end of device IC1 is connect with pwm control circuit, and the first input end of the photoelectrical coupler IC1 is through the 7th resistance R7 and output
The output end of current rectifying and wave filtering circuit connects, and the cathode of the second input terminal of the photoelectrical coupler IC1 and the first a reference source D12 connect
It connects, the anode of the first a reference source D12 connects reference ground, and the reference edge of the first a reference source D12 is respectively with the 28th resistance R28's
One end connection of one end, one end of the 29th resistance R29, the 13rd capacitance C13, the other end connection reference of the 13rd capacitance C13
The other end on ground, the 29th resistance R29 connects with the second output interface of one end of the 30th resistance R30, variable voltage rectifier respectively
It connecing, the other end of the 30th resistance R30 connects reference ground, the other end of the 28th resistance R28 and one end of the 25th resistance R25,
The cathode connection of one end of the 26th resistance R26, the anode of the 12nd capacitance C12, the second a reference source D13, the 12nd capacitance C12's is negative
Pole, the second a reference source D13 anode be all connected with reference ground, the other end of the 26th resistance R26 respectively with the 27th resistance R27 one
The reference edge connection at end, the second a reference source D13, the other end of the 27th resistance R27 connect reference ground, and the 25th resistance R25's is another
End is connect with the output end of output rectifier and filter.R25, R26, R27, D13, C12 form power circuit, act as providing
A reference source.C13 is filter action, avoids the occurrence of crest voltage and causes to malfunction, keeps system more stable.
The power circuit includes start-up circuit 17 and PWM power supply circuits 18, the input terminal of the start-up circuit and input
The output end of current rectifying and wave filtering circuit connects, and the output end of the start-up circuit and the power end of pwm control circuit connect, described
The control power supply winding of the input terminal of PWM power supply circuits and the high frequency transformer of power conversion circuit connects, the PWM power supplies electricity
The output end on road and the power end of pwm control circuit connect.The start-up circuit includes the 2nd resistance R2, the 3rd resistance R3, the 11st
Resistance R11, the 12nd resistance R12, the 2nd resistance R2 is in parallel with the 3rd resistance R3, the 11st resistance R11 and the 12nd resistance R12
One end of parallel connection, the 2nd resistance R2 is connect with the output end of input rectifying filter circuit, the other end of the 2nd resistance R2
It is connect with one end of the 11st resistance R11, the other end of the 11st resistance R11 and the power end of pwm control circuit connect.The PWM
Power supply circuit includes the 8th diode D8, the 6th filter capacitor C6, the 3rd voltage-stabiliser tube DW3, anode and the height of the 8th diode D8
The second end connection of the control power supply winding of frequency power transformer, the cathode of the 8th diode D8 are connect with one end of the 17th resistance R17,
The other end of 17th resistance R17 respectively with one end of the 19th resistance R19, the anode of the 6th filter capacitor C6, the 11st capacitance C11
The cathode connection of one end, the 3rd voltage-stabiliser tube DW3, the cathode of the 6th filter capacitor C6, the other end, the 3rd voltage-stabiliser tube of the 11st capacitance C11
The anode of DW3, the control power supply winding of high frequency transformer first end be grounded, the other end of the 19th resistance R19 is controlled with PWM
The power end of circuit connects.
The operation principle of the present invention：The alternating current that bypass power supply circuit generates charge coil passes through D10, and D11 is whole with C5
Solenoid valve is supplied after stream filtering.Bypass control circuit is by the control to metal-oxide-semiconductor Q2, to realize the control to bypass circuit；When
When voltage is less than setting value, Q2 conductings, control bypass power supply circuit access；When voltage is more than or equal to setting value, Q2 is turned off, control
Bypass power supply circuit processed disconnects, after bypass power supply circuit disconnects, by giving electricity with the switching power circuit of bypass power supply circuit in parallel
Magnet valve continues to power.
First output interface of variable voltage rectifier is current output terminal, and the second output interface of variable voltage rectifier is that electric current is defeated
Enter end.The sampled resistance R30 connections reference ground of the second output interface of variable voltage rectifier, when output current raising, sampling resistor
R30 both end voltages increase, and the reference voltage terminal of the first a reference source D12 increases to over setting value, the first a reference source D12 conductings, light
Electric coupler IC1 conductings, the pin VFB of PWM chip U1 is pulled low, as the PWM that U1 detects that VFB is pulled low, and just change exports
Duty ratio, achieve the purpose that limit output current.When output voltage voltage increases, the 1st voltage-stabiliser tube DW1 both end voltages increase super
Setting value is crossed, the 1st voltage-stabiliser tube DW1 conductings, photoelectrical coupler IC1 conductings, the pin VFB of PWM chip U1 is pulled low, when U1 is detected
It is pulled low to VFB, just changes the duty ratio of the PWM of output, output voltage is made to maintain to stablize.Change the duty ratio of PWM, just changes
The size of output power, when voltage change, output power changes, and electric current is constant, voltage will change, and work as curent change
When, output power changes, and voltage is constant, and electric current will change, to realize the purpose of pressure regulation, current limliting.
The present invention is not limited solely to above-described embodiment, without departing substantially from technical solution of the present invention spirit into
The technical solution of row few modifications should fall into protection scope of the present invention.
Claims (8)
1. a kind of diesel engine variable voltage rectifier, it is characterised in that：Including switching power circuit, bypass power supply circuit and bypass control
Circuit processed, the bypass power supply circuit are defeated after the voltage progress rectifying and wave-filtering in diesel engine starting for exporting charge coil
Go out to the electromagnetic valve switch power supply of injection pump, the electromagnetic valve switch of injection pump under startup rotating speed is made to work normally, the bypass control
Circuit processed is used to detect the output voltage of bypass power supply circuit, and the output voltage detected is compared with setting value, when
When bypass power supply circuit output voltage reaches setting value i.e. when diesel engine works normally, bypass power supply circuit is disconnected；Charging wire
Circle provides voltage, the Switching Power Supply when diesel engine works normally in diesel engine operating rotational speed range to switching power circuit
Circuit is used to after the voltage that charge coil exports is carried out voltage regulating rectifier export to the electricity consumption for the electromagnetic valve switch for including injection pump
Device provides power supply；Upon start up, the charge coil of diesel engine itself will output voltage handled by variable voltage rectifier after be electricity
Magnet valve switch provides power supply, opens electromagnetic valve switch, diesel engine is allowed to work normally, and when engine oil pressure occurs insufficient, oil pressure passes
Sensor will realize protection by controlling electromagnetic valve switch on/off；
The switching power circuit includes power circuit, input rectifying filter circuit, power conversion circuit, pwm control circuit, defeated
Go out current rectifying and wave filtering circuit, voltage feedback circuit, current sampling circuit, the power circuit is used to power for pwm control circuit, institute
State input rectifying filter circuit input terminal and variable voltage rectifier input interface connect, the input rectifying filter circuit it is defeated
The input terminal of outlet and power conversion circuit connects, and the output end of power conversion circuit is connect with output rectifier and filter, institute
State voltage feedback circuit input terminal and current rectifying and wave filtering circuit output end connect, the output end of the voltage feedback circuit with
The first input end of pwm control circuit connects, and the input terminal of the current sampling circuit is connect with power conversion circuit, the electricity
Second input terminal of the output end and pwm control circuit that flow sample circuit connects, the output end and power of the pwm control circuit
Translation circuit connects；
The power conversion circuit includes high frequency transformer（B1）, the 1st switching tube（Q1）, high frequency transformer（B1）Armature winding
Second end and the 1st switching tube（Q1）Drain electrode, RC current rectifying and wave filtering circuits input terminal connection, the output of RC current rectifying and wave filtering circuits
End respectively with the output end of input rectifying filter circuit, high frequency transformer（B1）Armature winding first end connection, high frequency become
Depressor（B1）Secondary windings and output rectifier and filter input terminal connect, the 1st switching tube（Q1）Source electrode difference
With the 18th resistance（R18）One end, the 14th resistance（R14）One end, the 4th voltage-stabiliser tube（DW4）Anode connection, it is described 18th electricity
Resistance（R18）The other end ground connection, the 14th resistance（R14）The other end, the 4th voltage-stabiliser tube（DW4）Cathode with the 1st switching tube
（Q1）Grid connection, the 1st switching tube（Q1）Grid through the 13rd resistance（R13）It is connect with the output end of pwm control circuit.
2. diesel engine variable voltage rectifier according to claim 1, it is characterised in that：The bypass power supply circuit includes the 10th
Diode（D10）, the 11st diode（D11）With the 5th filter capacitor（C5）, the 10th diode（D10）Anode and pressure regulation
First input interface of rectifier connects, the 11st diode（D11）Anode and the second input interface of variable voltage rectifier
Connection, the 10th diode（D10）Cathode, the 11st diode（D11）Cathode with the 5th filter capacitor（C5）Anode
Connection, the 5th filter capacitor（C5）Anode connect with the first output interface of variable voltage rectifier, the 5th filter capacitor
（C5）Cathode and variable voltage rectifier the second output interface connect.
3. diesel engine variable voltage rectifier according to claim 1, it is characterised in that：The bypass control circuit includes the 4th
Switching tube（Q4）, the 2nd switching tube（Q2）, the 2nd voltage-stabiliser tube（DW2）, the 4th switching tube（Q4）Base stage and the 23rd resistance
（R23）One end connection, the 23rd resistance（R23）The other end ground connection, the 4th switching tube（Q4）Base stage through resistance and pressure regulation
First output interface of rectifier connects, the 4th switching tube（Q4）Emitter ground connection, the 4th switching tube（Q4）Collection
Electrode respectively with the 2nd voltage-stabiliser tube（DW2）Cathode, the 10th resistance（R10）One end, the 20th resistance（R20）One end connection, institute
State the 2nd voltage-stabiliser tube（DW2）Plus earth, the 10th resistance（R10）The other end and variable voltage rectifier the first output interface connect
It connects, the 20th resistance（R20）The other end and the 2nd switching tube（Q2）Grid connection, the 2nd switching tube（Q2）Source electrode connect
Ground, the 2nd switching tube（Q2）Drain electrode and variable voltage rectifier the second output interface connect.
4. diesel engine variable voltage rectifier according to claim 1, it is characterised in that：The output rectifier and filter includes
1st diode（D1）, the 3rd filter capacitor（C3）, the 1st diode（D1）Anode and the high frequency transformation of power conversion circuit
Device（B1）Secondary windings second end connection, the 1st diode（D1）Cathode respectively with the 3rd filter capacitor（C3）Just
Pole, the 5th resistance（R5）One end connection, the 3rd filter capacitor（C3）Cathode, the 5th resistance（R5）The other end, high frequency become
Depressor（B1）The first end of secondary windings be all connected with reference ground.
5. diesel engine variable voltage rectifier according to claim 1, it is characterised in that：The voltage feedback circuit includes photoelectricity
Coupler（IC1）, the 1st voltage-stabiliser tube（DW1）, the photoelectrical coupler（IC1）First input end through the 7th resistance（R7）With output
The output end of current rectifying and wave filtering circuit connects, the photoelectrical coupler（IC1）The second input terminal and the 1st voltage-stabiliser tube（DW1）It is negative
Pole connects, the 1st voltage-stabiliser tube（DW1）Anode connection reference ground, the photoelectrical coupler（IC1）Output end and PWM control
Circuit connection processed.
6. diesel engine variable voltage rectifier according to claim 1, it is characterised in that：The switching power circuit is equipped with and is used for
Control the current-limiting circuit of output current.
7. diesel engine variable voltage rectifier according to claim 6, it is characterised in that：The current-limiting circuit includes photoelectric coupling
Device（IC1）, the first a reference source（D12）, the 30th resistance（R30）, the photoelectrical coupler（IC1）Output end and PWM control electricity
Road connects, the photoelectrical coupler（IC1）First input end through the 7th resistance（R7）With the output end of output rectifier and filter
Connection, the photoelectrical coupler（IC1）The second input terminal and the first a reference source（D12）Cathode connection, first benchmark
Source（D12）Anode connect reference ground, the first a reference source（D12）Reference edge respectively with the 28th resistance（R28）One end, the 29th
Resistance（R29）One end, the 13rd capacitance（C13）One end connection, the 13rd capacitance（C13）The other end connect reference ground,
29th resistance（R29）The other end respectively with the 30th resistance（R30）One end, variable voltage rectifier the second output interface connect
It connects, the 30th resistance（R30）The other end connect reference ground, the 28th resistance（R28）The other end and the 25th resistance（R25）'s
One end, the 26th resistance（R26）One end, the 12nd capacitance（C12）Anode, the second a reference source（D13）Cathode connection, the 12nd
Capacitance（C12）Cathode, the second a reference source（D13）Anode be all connected with reference ground, the 26th resistance（R26）The other end respectively with
27th resistance（R27）One end, the second a reference source（D13）Reference edge connection, the 27th resistance（R27）The other end connection reference
Ground, the 25th resistance（R25）The other end and output rectifier and filter output end connect.
8. diesel engine variable voltage rectifier according to claim 1, it is characterised in that：The power circuit includes start-up circuit
It is connect with the output end of input rectifying filter circuit with the input terminal of PWM power supply circuits, the start-up circuit, the start-up circuit
Output end and pwm control circuit power end connect, the high frequency of the input terminal and power conversion circuit of the PWM power supply circuits
The control power supply winding of transformer connects, and the output end of the PWM power supply circuits and the power end of pwm control circuit connect.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511005855.4A CN105471290B (en) | 2015-12-29 | 2015-12-29 | Diesel engine variable voltage rectifier |
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| CN201511005855.4A CN105471290B (en) | 2015-12-29 | 2015-12-29 | Diesel engine variable voltage rectifier |
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| CN105471290B true CN105471290B (en) | 2018-07-13 |
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| CN107634669B (en) * | 2017-11-15 | 2023-09-19 | 福建万润新能源科技有限公司 | Power supply circuit of permanent magnet synchronous motor without position sensor and control method thereof |
| CN108521163A (en) * | 2018-04-02 | 2018-09-11 | 北京新能源汽车股份有限公司 | Bidirectional electric automobile charging equipment and its power supply system |
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| CN205105107U (en) * | 2015-11-24 | 2016-03-23 | 重庆力华科技有限责任公司 | But dynamo power supply is sent out to fuel that low pressure input starts |
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| JPH0750982B2 (en) * | 1989-04-11 | 1995-05-31 | 富士電気化学株式会社 | Power supply |
| CN204886701U (en) * | 2015-09-14 | 2015-12-16 | 航天长峰朝阳电源有限公司 | A excitation power supply for solenoid valve |
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| CN205105107U (en) * | 2015-11-24 | 2016-03-23 | 重庆力华科技有限责任公司 | But dynamo power supply is sent out to fuel that low pressure input starts |
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