CN109067221A - A kind of inverter circuit - Google Patents

A kind of inverter circuit Download PDF

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Publication number
CN109067221A
CN109067221A CN201811187214.9A CN201811187214A CN109067221A CN 109067221 A CN109067221 A CN 109067221A CN 201811187214 A CN201811187214 A CN 201811187214A CN 109067221 A CN109067221 A CN 109067221A
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China
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resistance
connect
field
effect tube
capacitor
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CN201811187214.9A
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CN109067221B (en
Inventor
李文勇
李焯辉
范俊盛
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Guangzhou Pujin Electronics Co ltd
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Zhongshan Peugeot Electronic Technology Co Ltd
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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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

The invention discloses a kind of inverter circuits, comprising: voltage regulator circuit, booster circuit, inverter circuit, over-and under-voltage protection circuit and circuit for alarming；The DC voltage that voltage regulator circuit inputs input terminal carries out steady pressure treatment, and by the direct voltage output after pressure stabilizing to booster circuit；DC voltage after pressure stabilizing is boosted, rectified and is filtered by booster circuit, obtains the high-voltage dc signal higher than input terminal voltage, high-voltage dc signal inversion is industrial frequency AC signal by H-bridge circuit by inverter circuit, and industrial frequency AC signal is exported；Over-and under-voltage protection circuit is connect with inverter circuit, is used for voltage condition in real-time detection circuit, in voltage higher or lower than signal an alert when presetting normal voltage value to the auxiliary circuit, and cuts off circuit；Circuit for alarming receives the alarm signal that over-and under-voltage protection circuit is issued, and amplifies, and issues audible and visible alarm.The present invention has low in energy consumption, circuit the operation is stable and characteristic with long service life.

Description

A kind of inverter circuit
Technical field
The present invention relates to DC-ac conversion circuit technical field, more particularly to a kind of inverter circuit.
Background technique
Inverter is a kind of conversion equipment for direct current being converted to alternating current, is widely used in air-conditioning, home theater, electricity The occasions such as power driven tools, household electrical appliance, communication base station, substation.Traditional inverter circuit is completed with front and back stages circuit, institute Relatively more with power-type component, power consumption is also higher, and inefficient, and circuit structure is complicated, too high or too low in circuit voltage When unprotect measure, circuit abnormal operating state operation be easily damaged, circuit life is low.
It can be seen that how to provide one kind low in energy consumption, circuit the operation is stable, inverter circuit with long service life becomes this Field technical staff technical problem urgently to be resolved.
Summary of the invention
In view of this, having the operation is stable, security performance high and service life the present invention provides a kind of inverter circuit Long characteristic.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of inverter circuit, comprising: voltage regulator circuit, booster circuit, inverter circuit, over-and under-voltage protection circuit and alarm electricity Road；
The DC voltage that the voltage regulator circuit inputs input terminal carries out steady pressure treatment, and extremely by the direct voltage output after pressure stabilizing The booster circuit；
DC voltage after pressure stabilizing is boosted, rectified and is filtered by the booster circuit, obtains being higher than input terminal voltage High-voltage dc signal, and the high-voltage dc signal is exported to the inverter circuit；
The high-voltage dc signal inversion is industrial frequency AC signal by H-bridge circuit by the inverter circuit, and by the power frequency AC signal output；
The over-and under-voltage protection circuit is connect with the inverter circuit, voltage condition in real-time detection circuit is used for, in electricity Pressure cuts off circuit higher or lower than signal an alert when presetting normal voltage value to the auxiliary circuit；
The circuit for alarming receives the alarm signal that the over-and under-voltage protection circuit is issued, and amplifies, and issues acousto-optic Alarm.
As can be seen from the above technical solutions, the present invention can guarantee that stablizing for DC voltage inputs by voltage regulator circuit；It is logical Circuit can be cut off when there is over-voltage, brownout condition in time by crossing over-and under-voltage protection circuit monitoring circuit operations conditions, be protected Protection circuit avoids circuit because non-normal working and damages, and then improves service life；It can be to abnormal conditions by circuit for alarming It is warned, convenient for processing abnormal conditions in time.
Preferably, in a kind of above-mentioned inverter circuit, the voltage regulator circuit include voltage-stablizer U5, electrolytic capacitor C39, The end VIN of C40 and diode D10, voltage-stablizer U5 are connect with the cathode of the anode of electrolytic capacitor C39 and diode D10 respectively, and two The anode of pole pipe D10 is connect with the input terminal of transformer T1；The OUT terminal of voltage-stablizer U5 respectively with+12V voltage and electrolytic capacitor C40 anode connection, the end GND of voltage-stablizer U5, the cathode of electrolytic capacitor C39, electrolytic capacitor C40 cathode and transformer T1 Input terminal be connected to each other and be grounded.
Preferably, in a kind of above-mentioned inverter circuit, the booster circuit includes boosting unit and rectification filtering unit； DC voltage after steady pressure treatment is carried out boosting processing by the boosting unit, obtains high-voltage square wave signal；The boosting unit Output end connect with the input terminal of the rectification filtering unit, the rectification filtering unit rectifies high-voltage square wave signal Filtering processing obtains high-voltage dc signal, and exports to the inverter circuit.
Preferably, in a kind of above-mentioned inverter circuit, the boosting unit includes transformer T1, T2, T3, T4, three poles Pipe Q1, Q2, Q3 and Q4, field-effect tube Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q18, Q19, Q20, resistance R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, Capacitor C1, C2 and C3, electrolytic capacitor C4 and PWM chip U1；Triode Q1 and Q3 are NPN type triode, and triode Q2 and Q4 are PNP type triode；
The grid of field-effect tube Q5 is connect with one end of resistance R4, and the grid of field-effect tube Q6 and one end of R5 connect, field-effect The grid of pipe Q7 is connect with one end of resistance R6, and the grid of field-effect tube Q8 is connect with one end of resistance R7, field-effect tube Q9's Grid is connect with one end of resistance R8, and the grid of field-effect tube Q10 is connect with one end of resistance R9, the grid of field-effect tube Q11 Connect with one end of resistance R10, the grid of field-effect tube Q12 is connect with one end of resistance R11, the grid of field-effect tube Q13 with One end of resistance R12 connects, and the grid of field-effect tube Q14 is connect with one end of resistance R13, the grid and electricity of field-effect tube Q15 One end connection of R14 is hindered, the grid of field-effect tube Q16 is connect with one end of resistance R15, the grid and resistance of field-effect tube Q17 One end of R16 connects, and the grid of field-effect tube Q18 is connect with one end of resistance R17, the grid and resistance R18 of field-effect tube Q19 One end connection, the grid of field-effect tube Q20 connect with one end of resistance R19；The other end of resistance R4, resistance R5 it is another End, the other end of resistance R8, the other end of resistance R9, the other end of resistance R12, the other end of resistance R13, resistance R16 it is another The other end of one end and resistance R17 are connected to each other, and connect with the circuit for alarming；The other end of resistance R6 respectively with resistance R7 The other end, the other end of resistance R10, the other end of resistance R11, the other end of resistance R14, resistance R15 the other end, resistance The other end of R18 is connected with the other end of resistance R19, and is connect with the circuit for alarming；
The sources connected in parallel of field-effect tube Q5-Q18, Q20, and it is in parallel with the drain electrode of Q19；The drain electrode of field-effect tube Q5-Q8 is in parallel, and It is connect with the input terminal of transformer T1；The drain electrode of field-effect tube Q9-Q12 is in parallel, and connect with the input terminal of transformer T2；Field effect Should pipe Q13 and Q14 drain electrode access transformer T3 in parallel input terminal, the drain electrode parallel connection of field-effect tube Q15 and Q16 accesses transformation The input terminal of device T3；The input terminal of the drain electrode of field-effect tube Q17 and Q18 access transformer T3 in parallel, the source electrode of field-effect tube Q19 With the input terminal of the drain electrode access transformer T4 in parallel of field-effect tube Q20；
2 pins and 8 pins of PWM chip U1 connect and pass through electrolytic capacitor C5 and are grounded；Pass through capacitor between 1 pin and 9 pins C2 connection；3 pins and 4 pins are vacant；5 pins and the connection of 7 pins, and connected respectively with 10 pins and 12 pins by capacitor C1 It connects；6 pins are connect with 10 pins and 12 pins respectively by resistance R1；11 pins pass through the resistance R2 base with triode Q1 respectively Pole is connected with the base stage of triode Q2, and the base stage of triode Q1 is connect with the base stage of triode Q2, the emitter of triode Q1 with The emitter of triode Q2 connects, and connect with the other end of resistance R6；The collector of triode Q1 respectively with capacitor C3 one The anode connection at end and electrolytic capacitor C4, the other end of capacitor C3 and the cathode of electrolytic capacitor C4 are grounded, the collection of triode Q2 Electrode ground connection；10 pins and 12 pins of PWM chip U1 are grounded；14 pins of PWM chip U1 are by resistance R3 respectively with three Pole pipe Q3 is connected with the base stage of triode Q4, and the collector of triode Q3 is connected with the collector of triode Q1, triode Q3's Emitter is connect with the emitter of triode Q4, and is connect with the other end of resistance R5；The grounded collector of triode Q4；PWM 13 pins of chip U1 and the connection of 15 pins, 15 pins of PWM chip U1 are connect with the end VCC, and pass through inductance L5 and transformer The input terminal of T1 connects, and switch K1 is connected between inductance L5 and the input terminal of transformer T1；The input terminal of transformer T1 and institute Voltage regulator circuit connection is stated, the output end of transformer T1, T2, T3 and T4 are connect with the input terminal of the rectification filtering unit.
Preferably, in a kind of above-mentioned inverter circuit, further include protective tube F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, electrolytic capacitor C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21；Transformer Resistance R20 and capacitor C22 are in series between the input terminal of T1 and the source electrode of field-effect tube Q6；Electrolytic capacitor C10, C11 and C12 are simultaneously Connection, and its anode is connect with the input terminal of transformer T1 and protective tube F1-F3, cathode is grounded；
Resistance R21 and capacitor C23 are in series between the drain electrode of the input terminal and field-effect tube Q9 of transformer T2；Electrolytic capacitor C13, C14 and C15 is in parallel, and its anode is connect with the input terminal of transformer T2 and protective tube F4-F6, and cathode is grounded；Transformation Resistance R22 and capacitor C24 are in series between the drain electrode of the input terminal and field-effect tube Q13 of device T3；Electrolytic capacitor C16, C17 and C18 is in parallel, and its anode is connect with the input terminal of transformer T3 and protective tube F7-F9, and cathode is grounded；Transformer T4's Resistance R23 and capacitor C25 are in series between input terminal and field-effect tube Q17, electrolytic capacitor C19, C20 and C21 are in parallel, and it is just It is extremely connect with the input terminal of transformer T4 and protective tube F10-F12, cathode is grounded.
Preferably, in a kind of above-mentioned inverter circuit, the rectification filtering unit includes being made of diode D15-D18 The first rectifier bridge, be made of diode D19-D22 the second rectifier bridge, be made of diode D23-D26 third rectifier bridge, The 4th rectifier bridge that is made of diode D27-D30, capacitor C42, C43, C44 and C45, electrolytic capacitor C46 and C47, inductance L1, L2, L3 and L4；The input terminal of first rectifier bridge is connect with the output end of transformer T1, the cathode output end difference of the first rectifier bridge It is connect with one end of one end of inductance L1 and capacitor C42, the other end of inductance L1 is connect with the anode of electrolytic capacitor C46, is electrolysed Capacitor C46 and C47 series connection；The cathode of the cathode output end of first rectifier bridge, the other end of capacitor C42 and electrolytic capacitor C47 is equal Ground connection；The input terminal of second rectifier bridge is connect with the output end of transformer T2, cathode output end respectively with one end of inductance L2 and One end of capacitor C43 connects, and the other end of cathode output end and capacitor C43 are grounded；The input terminal and transformation of third rectifier bridge The input terminal of device T3 connects, and cathode output end connect with one end of one end of inductance L3 and capacitor C44 respectively, cathode output end with The other end of capacitor C44 is grounded；The input terminal of 4th rectifier bridge is connect with the output end of transformer T4, cathode output end difference It is connect with one end of inductance L4 and capacitor C45, the other end of cathode output end and capacitor C45 are grounded；The other end of inductance L1, The other end of the other end of inductance L2, the other end of inductance L3 and inductance L4 is connect with the input terminal of the inverter circuit；
Resistance R88, R89, R90, R91 and R92, resistance R88-R90 are also connected between the input terminal and ground of the inverter circuit Series connection, resistance R91 and R92 series connection are simultaneously in parallel with the series circuit of R88-R90 composition, and resistance R92 is connect with the circuit for alarming.
Preferably, in a kind of above-mentioned inverter circuit, the inverter circuit include by field-effect tube Q27, Q28, Q29, Q30, Q31, Q32, Q33, Q34, Q35, Q36, Q37, Q38, Q39, Q40, Q41, Q42, Q43, Q44, Q45, Q46, Q47 and Q48 The H-bridge circuit of composition, triode Q22, Q25, Q26, Q37 and Q38, resistance R38, R39, R55, R56, R57, R58, R59, R60, R61、R62、R63、R64、R65、R66、R67、R68、R69、R70、R71、R72、R73、R74、R75、R76、R77、R78、R79、 R80, R81, R82, R83 and R84, diode D11, D12, D13 and D14, capacitor C28, C29, C48 and C49, electrolytic capacitor C30, C36, C37 and C38, inductance L6 and PWM chip U3；Wherein triode Q22, Q25 and Q37 is NPN type triode, Q26 and Q38 For PNP type triode；
Wherein, the grid of field-effect tube Q27 is connect with one end of resistance R59, the grid of field-effect tube Q28 and the one of resistance R60 End connection, the grid of field-effect tube Q29 are connect with one end of resistance R61, the grid of field-effect tube Q30 and one end of resistance R62 Connection, the grid of field-effect tube Q31 are connect with one end of resistance R63, the other end of resistance R59, the other end of resistance R60, electricity Resistance R61 the other end, the other end of resistance R62 and the other end of resistance R63 be connected to each other, and with the collector of triode Q25, The cathode of diode D12 is connected with one end of resistance R57, and the emitter ground connection of triode Q25, base stage passes through resistance R55 and electricity Resistance R56 is connect with the base stage of triode Q26；The other end of resistance R57 respectively with the cathode of diode D11, electrolytic capacitor C36 Anode is connected with one end of resistance R58, and the anode of diode D11 connects+12V voltage；The cathode of electrolytic capacitor C36, resistance R58 The anode of the other end and diode D12 are connect with one end of capacitor C48；
The grid of field-effect tube Q32 is connect with one end of resistance R65, and the grid of field-effect tube Q33 and one end of resistance R66 connect It connecing, the grid of field-effect tube Q34 is connect with one end of resistance R67, and the grid of field-effect tube Q35 is connect with one end of resistance R68, The grid of field-effect tube Q36 is connect with one end of resistance R69；The other end of resistance R65, the other end of resistance R66, resistance R67 The other end, the other end of resistance R68 and the other end of resistance R69 be connected to each other, and emitter and resistance with triode Q26 One end of R64 connects, another termination+12V voltage of resistance R64, and grounded collector, the base stage of triode Q26 passes through resistance R56 It is connect with 11 pins of PWM chip；
The grid of field-effect tube Q39 is connect with one end of resistance R74, and the grid of field-effect tube Q40 and one end of resistance R75 connect It connecing, the grid of field-effect tube Q41 is connect with one end of resistance R76, and the grid of field-effect tube Q42 is connect with one end of resistance R77, The grid of field-effect tube Q43 is connect with one end of resistance R78；The other end of resistance R74, the other end of resistance R75, resistance R76 The other end, the other end of resistance R77 and the other end of resistance R78 be connected to each other, and respectively with the cathode of diode D14, electricity One end of resistance R72 is connected with the collector of triode Q37, and the emitter ground connection of triode Q37, base stage passes through resistance R70 and PWM 14 pins of chip U3 connect；The other end of resistance R72 respectively with one end of resistance R73, the anode of electrolytic capacitor C37 and two poles The cathode of pipe D13 connects；Positive access+12V the voltage of diode D13, the anode of diode D14, the other end of resistance R73 and The cathode of capacitor C37 is connected to each other, and connect with the other end of one end of inductance L6 and electrolytic capacitor C48, and the two of capacitor C49 End is connect with the other end of one end of capacitor C48 and inductance L6 respectively, and is connect with the output end of industrial frequency AC signal；
The grid of field-effect tube Q44 is connect with one end of resistance R80, and the grid of field-effect tube Q45 and one end of resistance R81 connect It connecing, the grid of field-effect tube Q46 is connect with one end of resistance R82, and the grid of field-effect tube Q47 is connect with one end of resistance R83, The grid of field-effect tube Q48 is connect with one end of resistance R84；The other end of resistance R80, the other end of resistance R81, resistance R82 The other end, the other end of resistance R83 and the other end of resistance R84 be connected to each other, and with one end of resistance R79 and triode The emitter of Q38 connects, the grounded collector of triode Q38, and base stage is connect by resistance R71 with 14 pins of PWM chip U3； Another termination+12V voltage of resistance R79；
The source electrode of field-effect tube Q27, the source electrode of field-effect tube Q28, the source electrode of field-effect tube Q29, field-effect tube Q30 source electrode, The source electrode of field-effect tube Q31, the drain electrode of field-effect tube Q32, the drain electrode of field-effect tube Q33, the drain electrode of field-effect tube Q34, field effect Should the drain electrode of pipe Q35 and the drain electrode of field-effect tube Q36 be connected to each other and one with the anode of diode D12 and capacitor C48 respectively End connection；
The drain electrode of field-effect tube Q39, the drain electrode of field-effect tube Q40, the source electrode of field-effect tube Q41, field-effect tube Q42 source electrode, The source electrode of field-effect tube Q43, the drain electrode of field-effect tube Q44, the drain electrode of field-effect tube Q45, the drain electrode of field-effect tube Q46, field effect Should the drain electrode of pipe Q47 and the drain electrode of field-effect tube Q48 be connected to each other and connect with the other end of capacitor C48；
The drain electrode of field-effect tube Q27, the drain electrode of field-effect tube Q28, the drain electrode of field-effect tube Q29, the drain electrode of field-effect tube Q30, The drain electrode of field-effect tube Q31, the source electrode of field-effect tube Q39, the source electrode of field-effect tube Q40, the drain electrode of field-effect tube Q41, field effect Should the drain electrode of pipe Q42, the drain electrode of field-effect tube Q43 connect with the other end of inductance L4；
The source electrode of field-effect tube Q32, the source electrode of field-effect tube Q33, the source electrode of field-effect tube Q34, field-effect tube Q35 source electrode, The source electrode of field-effect tube Q36, the source electrode of field-effect tube Q44, the source electrode of field-effect tube Q45, the source electrode of field-effect tube Q46, field effect Should pipe Q47 source electrode and field-effect tube Q48 source electrode with electrolytic capacitor C38 anode connect；
PWM chip U3 is KA3525, is connected between 1 pin and 9 pins by capacitor C29,3 pins and 4 pins are vacant, and 13 draw Foot and 15 pins connect and access+12V voltage, 10 pins and 12 pins ground connection, and 1 pin, 2 pins, 6 pins, 11 pins, 14 are drawn Foot and 16 pins protect circuit connection with the over-and under-voltage respectively；8 pins of PWM chip U3 respectively with the collector of triode With the anode connection of electrolytic capacitor C30,7 pins and 5 pins of PWM chip U3 are connect with one end of capacitor C28；Triode The emitter of the Q22 other end connect and ground with the cathode of capacitor C30 and capacitor C28 respectively；The base stage of triode Q22 is distinguished It is connect with one end of one end of resistance R38 and resistance R39, the other end of resistance R38 is connect with the anode of capacitor C38, capacitor C38 Cathode, the other end of resistance R39 and the cathode of electrolytic capacitor C30 be connected to each other and be grounded.
Preferably, in a kind of above-mentioned inverter circuit, the over-and under-voltage protection circuit includes comparator A5 and A6, three Pole pipe Q23 and Q24, electrolytic capacitor C31, C32, C33, C34, C35 and C41, potentiometer VR1 and VR2, diode D5, D6, D7, D8 and D9 and resistance R37, R40, R41, R42, R43, R44, R45, R46, R47, R48, R49, R50, R51, R52, R53, R54, R85, R86 and R87；Triode Q23 and Q24 are NPN type triode；
The in-phase output end of comparator A5 is connect with one end of resistance R54, and resistance R85, R86 and R87 is in parallel, and its composition and Join circuit on one side ground connection, the other end is connect with the other end of resistance R54；The reverse input end of comparator A5 by resistance R52 with 16 pins of PWM chip U3 connect, and are grounded by resistance R53；The output end of comparator A5 passes through electrolytic capacitor C34 and resistance One end of R54 connects, and is connect respectively with the input terminal of the emitter of triode Q24 and the circuit for alarming by diode D9； The series circuit that electrolytic capacitor C32 and resistance R52 and resistance R53 are formed is in parallel, and its it is positive respectively with one end of resistance R48, The cathode of diode D5 is connected with one end of resistance R43, and the other end of resistance R48 is connect with 2 pins of PWM chip U3, two poles The anode of pipe D5 is connect with the anode of electrolytic capacitor C30, and the other end of resistance R43 is connect with the in-phase output end of comparator A6；
The reverse input end of comparator A6 connects with the cathode of one end of resistance R42, the cathode of diode D6 and diode D7 respectively It connects, the other end ground connection of resistance R42；The anode of diode D6 connects with one end of 11 pins of PWM chip U3 and resistance R40 respectively It connects, the other end ground connection of resistance R40；The anode of diode D7 connects with one end of 14 pins of PWM chip U3 and resistance R41 respectively It connects, the other end ground connection of resistance R41；6 pins of PWM chip U3 pass sequentially through resistance R37 and potentiometer VR2 ground connection；Comparator A6's connects+12V voltage and connect with the collector of the anode of electrolytic capacitor C41 and triode Q24, the cathode of electrolytic capacitor C41 Ground connection；The output end of comparator A6 is connect with the anode of one end of resistance R44 and diode D8 respectively, the other end of resistance R44 It is connect with the base stage of triode Q23, the cathode of diode D8 is connect with one end of resistance R45, the other end of resistance R45, electrolysis The base stage of the anode of capacitor C35, one end of resistance R46 and triode Q24 is connected to each other；The cathode and resistance of electrolytic capacitor C35 The other end of R46 is grounded；The emitter of triode Q23 is grounded, collector by resistance R51 respectively with 1 pin of PWM chip U3 Connection is connect with the anode of electrolytic capacitor C31, the cathode ground connection of electrolytic capacitor C31；The collector of triode Q23 passes sequentially through Potentiometer VR1 and resistance R49 are connect with inductance L4, are grounded by resistance R50；One end of resistance R47 is grounded, the other end with it is described The input terminal of circuit for alarming connects.
Preferably, in a kind of above-mentioned inverter circuit, the circuit for alarming includes amplifier A1, A2, A3 and A4, three poles Pipe Q21, photoelectrical coupler RP1 and RP2, Light-emitting diode LED 1, loudspeaker DZ1, radiator FAN1, diode D1, D2, D3 and D4, electrolytic capacitor C5, C6, C7 and C26, capacitor C8, C9 and C27, resistance R24, R25, R26, R27, R28, R29, R30, R31, R32, R33, R34, R35, R36 and R93 and slide rheostat TR1；Triode Q21 is NPN type triode；
The anode of electrolytic capacitor C5 is connect with the anode of 2 pins of PWM chip U1,8 pins and diode D4 respectively, and cathode connects Ground；The cathode of diode D4 respectively with the anode of electrolytic capacitor C6, one end of resistance R31, slide rheostat TR1 one end and One end of resistance R29 connects；The cathode of electrolytic capacitor C6 connect and connects with the cathode of one end of R33 and electrolytic capacitor C5 respectively Ground；The other end of resistance R33 is connect with one end of 1 pin of PWM chip U1 and resistance R32 respectively；The other end of resistance R32 point It is not connect with the cathode of the output end of photoelectrical coupler PR2 and diode D3；Diode D3 anode respectively with photodiode The cathode of LED1, the anode of diode D1 are connected with the output end of amplifier A1；The other end of resistance R31 respectively with amplifier A1 In-phase output end, the cathode of diode D1, the in-phase output end of amplifier A2, the cathode of diode D2, capacitor C8 one end And the output end connection of photoelectrical coupler；The other end of slide rheostat TR1 respectively with the in-phase output end of amplifier A4 and One end of resistance R27 connects；The other end of resistance R27 connects with one end of the in-phase output end of amplifier A3 and resistance R28 respectively It connects；The output end of amplifier A3 is connect with the anode of diode D2；The other end of resistance R29 is reversed defeated with amplifier A4 respectively Enter one end connection at end, the direction input terminal of amplifier A3 and resistance R30；The reverse input end of amplifier A1 respectively with resistance One end of one end of R25, the anode of electrolytic capacitor C7 and resistance R24 connects；The other end of resistance R25 respectively with amplifier A2 Reverse input end, capacitor C9 one end connected with one end of resistance R26；The output end of amplifier A2 and the other end of capacitor C9 It is connect with the anode of loudspeaker DZ1；The anode of photodiode LED1 respectively with one end of resistance R34 and resistance R93 one End connection, the other end of resistance R93 and the output end of photoelectrical coupler connect the end VCC；The input terminal of photoelectrical coupler RP1 is distinguished It is connect with the cathode of the other end of resistance R47, the emitter of triode Q24 and diode D9；
The other end of resistance R34, the cathode of loudspeaker DZ1, the other end of capacitor C8, the other end of resistance R26, resistance R28 The cathode of the other end, the other end of resistance R30 and electrolytic capacitor C7 is grounded；The other end of resistance R24 is with transformer T1's Input terminal connection, and connect by switch K1 with inductance L5；
The output end of amplifier A4 is connect by resistance R36 with the base stage of triode Q21, the collector of triode Q21 and heat dissipation One end of device FAN1 connects, and the other end of radiator FAN1 is connect with the anode of one end of inductance L5 and electrolytic capacitor C26 respectively, The other end of inductance L5 connect with one end of capacitor C27 and accesses the end VCC；The emitter of triode Q21, electrolytic capacitor C26 The other end of cathode and capacitor C27 are grounded.
The present invention also provides a kind of inverters, including above-mentioned inverter circuit.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.
Fig. 1 attached drawing is structural framing figure provided by the invention；
Fig. 2 attached drawing is structural schematic diagram provided by the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the embodiment of the invention discloses a kind of inverter circuits, comprising: voltage regulator circuit 1, booster circuit 2, Inverter circuit 3, over-and under-voltage protection circuit 4 and circuit for alarming 5；
The DC voltage that voltage regulator circuit 1 inputs input terminal carries out steady pressure treatment, and the direct voltage output after pressure stabilizing is extremely risen Volt circuit 2；
DC voltage after pressure stabilizing is boosted, rectified and is filtered by booster circuit 2, obtains the height higher than input terminal voltage Direct current signal is pressed, and high-voltage dc signal is exported to inverter circuit 3；
High-voltage dc signal inversion is industrial frequency AC signal by H-bridge circuit by inverter circuit 3, and industrial frequency AC signal is defeated Out；
Over-and under-voltage protection circuit 4 is connect with inverter circuit 3, is used for voltage condition in real-time detection circuit, is higher than in voltage Or lower than signal an alert when presetting normal voltage value to auxiliary circuit, and cut off circuit；
Circuit for alarming 5 receives the alarm signal that over-and under-voltage protection circuit 4 is issued, and amplifies, and issues audible and visible alarm.
Specifically, as shown in Fig. 2, voltage regulator circuit 1 includes voltage-stablizer U5, electrolytic capacitor C39, C40 and diode D10, surely The end VIN of depressor U5 is connect with the cathode of the anode of electrolytic capacitor C39 and diode D10 respectively, anode and the change of diode D10 The input terminal of depressor T1 connects；The OUT terminal of voltage-stablizer U5 is connect with the anode of+12V voltage and electrolytic capacitor C40 respectively, pressure stabilizing The end GND of device U5, the cathode of electrolytic capacitor C39, the cathode of electrolytic capacitor C40 and transformer T1 input terminal be connected to each other simultaneously Ground connection.Voltage-stablizer U5 uses KA7812, and the capacitance of electrolytic capacitor C40 is 220 μ F, and the capacitance of electrolytic capacitor C39 is 470 μ F.
Booster circuit 2 includes boosting unit 21 and rectification filtering unit 22；Boosting unit 21 is by the direct current after steady pressure treatment Voltage carries out boosting processing, obtains high-voltage square wave signal；The output end of boosting unit 21 and the input terminal of rectification filtering unit 22 High-voltage square wave signal is carried out rectifying and wave-filtering processing by connection, rectification filtering unit 22, obtains high-voltage dc signal, and export to inverse Power transformation road 3.
Boosting unit 21 include transformer T1, T2, T3, T4, triode Q1, Q2, Q3 and Q4, field-effect tube Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q18, Q19, Q20, resistance R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, capacitor C1, C2 and C3, electrolytic capacitor C4 and PWM chip U1；The grid of field-effect tube Q5 is connect with one end of resistance R4, and the grid of field-effect tube Q6 and one end of R5 connect, field-effect tube The grid of Q7 is connect with one end of resistance R6, and the grid of field-effect tube Q8 is connect with one end of resistance R7, the grid of field-effect tube Q9 Pole is connect with one end of resistance R8, and the grid of field-effect tube Q10 is connect with one end of resistance R9, the grid of field-effect tube Q11 with One end of resistance R10 connects, and the grid of field-effect tube Q12 is connect with one end of resistance R11, the grid and electricity of field-effect tube Q13 One end connection of R12 is hindered, the grid of field-effect tube Q14 is connect with one end of resistance R13, the grid and resistance of field-effect tube Q15 One end of R14 connects, and the grid of field-effect tube Q16 is connect with one end of resistance R15, the grid and resistance R16 of field-effect tube Q17 One end connection, the grid of field-effect tube Q18 connect with one end of resistance R17, and the grid of field-effect tube Q19 is with resistance R18's One end connection, the grid of field-effect tube Q20 are connect with one end of resistance R19；The other end of resistance R4, resistance R5 the other end, The other end of resistance R8, the other end of resistance R9, the other end of resistance R12, the other end of resistance R13, resistance R16 the other end It is connected to each other with the other end of resistance R17, and is connect with circuit for alarming 5；The other end of resistance R6 is another with resistance R7 respectively End, the other end of resistance R10, the other end of resistance R11, the other end of resistance R14, the other end of resistance R15, resistance R18 The other end is connected with the other end of resistance R19, and is connect with circuit for alarming 5；
The sources connected in parallel of field-effect tube Q5-Q18, Q20, and it is in parallel with the drain electrode of Q19；The drain electrode of field-effect tube Q5-Q8 is in parallel, and It is connect with the input terminal of transformer T1；The drain electrode of field-effect tube Q9-Q12 is in parallel, and connect with the input terminal of transformer T2；Field effect Should pipe Q13 and Q14 drain electrode access transformer T3 in parallel input terminal, the drain electrode parallel connection of field-effect tube Q15 and Q16 accesses transformation The input terminal of device T3；The input terminal of the drain electrode of field-effect tube Q17 and Q18 access transformer T3 in parallel, the source electrode of field-effect tube Q19 With the input terminal of the drain electrode access transformer T4 in parallel of field-effect tube Q20；
2 pins and 8 pins of PWM chip U1 connect and pass through electrolytic capacitor C5 and are grounded；Pass through capacitor between 1 pin and 9 pins C2 connection；3 pins and 4 pins are vacant；5 pins and the connection of 7 pins, and connected respectively with 10 pins and 12 pins by capacitor C1 It connects；6 pins are connect with 10 pins and 12 pins respectively by resistance R1；11 pins pass through the resistance R2 base with triode Q1 respectively Pole is connected with the base stage of triode Q2, and the base stage of triode Q1 is connect with the base stage of triode Q2, the emitter of triode Q1 with The emitter of triode Q2 connects, and connect with the other end of resistance R6；The collector of triode Q1 respectively with capacitor C3 one The anode connection at end and electrolytic capacitor C4, the other end of capacitor C3 and the cathode of electrolytic capacitor C4 are grounded, the collection of triode Q2 Electrode ground connection；10 pins and 12 pins of PWM chip U1 are grounded；14 pins of PWM chip U1 are by resistance R3 respectively with three Pole pipe Q3 is connected with the base stage of triode Q4, and the collector of triode Q3 is connected with the collector of triode Q1, triode Q3's Emitter is connect with the emitter of triode Q4, and is connect with the other end of resistance R5；The grounded collector of triode Q4；PWM 13 pins of chip U1 and the connection of 15 pins, 15 pins of PWM chip U1 are connect with the end VCC, and pass through inductance L5 and transformer The input terminal of T1 connects, and switch K1 is connected between inductance L5 and the input terminal of transformer T1；The input terminal of transformer T1 and steady Volt circuit 1 connects, and the output end of transformer T1, T2, T3 and T4 are connect with the input terminal of rectification filtering unit 22.Wherein, electric Hindering R4-R19 resistance value size is 20 Ω, and field-effect tube Q5-Q20 is all made of the enhanced metal-oxide-semiconductor IRF3205 of N-channel.Triode Q1 B772 is used using D882, Q2 and Q4 with Q3.The resistance value of resistance R1 is 26*103The resistance value of Ω, R2 and R3 are 10 Ω capacitor C1 Capacitance be 10*102The capacitance of pF, C2 are 10*103The capacitance of pF, C3 are 10*104The capacitance of pF, C4 are 47uF.
It is more favorable, boosting unit 21 further include protective tube F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, electrolytic capacitor C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21；The input terminal of transformer T1 Resistance R20 and capacitor C22 are in series between the source electrode of field-effect tube Q6；Electrolytic capacitor C10, C11 and C12 are in parallel, and it is just It is extremely connect with the input terminal of transformer T1 and protective tube F1-F3, cathode is grounded；Wherein, the specification of protective tube F1-F12 It is 25A, the capacitance of electrolytic capacitor C10-C21 is 2200uF, and the capacitance of capacitor C22-C25 is 20*103pF。
Resistance R21 and capacitor C23 are in series between the drain electrode of the input terminal and field-effect tube Q9 of transformer T2；Electrolytic capacitor C13, C14 and C15 are in parallel, and its anode is connect with the input terminal of transformer T2 and protective tube F4-F6, and cathode is grounded； Resistance R22 and capacitor C24 are in series between the drain electrode of the input terminal and field-effect tube Q13 of transformer T3；Electrolytic capacitor C16, C17 It is in parallel with C18, and its anode is connect with the input terminal of transformer T3 and protective tube F7-F9, cathode is grounded；Transformer T4 Input terminal and field-effect tube Q17 between be in series with resistance R23 and capacitor C25, electrolytic capacitor C19, C20 and C21 are in parallel, and its Anode is connect with the input terminal of transformer T4 and protective tube F10-F12, and cathode is grounded.Wherein, the resistance of resistance R20-R23 Value is 5.6 Ω.
Specifically, rectification filtering unit includes the first rectifier bridge being made of diode D15-D18, by diode D19- D22 composition the second rectifier bridge, be made of diode D23-D26 third rectifier bridge, be made of diode D27-D30 the 4th Rectifier bridge, capacitor C42, C43, C44 and C45, electrolytic capacitor C46 and C47, inductance L1, L2, L3 and L4；First rectifier bridge it is defeated Enter end to connect with the output end of transformer T1, the cathode output end of the first rectifier bridge respectively with one end of inductance L1 and capacitor C42 One end connection, the other end of inductance L1 connect with the anode of electrolytic capacitor C46, and electrolytic capacitor C46 and C47 connect；First is whole Cathode output end, the other end of capacitor C42 and the cathode of electrolytic capacitor C47 of stream bridge are grounded；The input terminal of second rectifier bridge It is connect with the output end of transformer T2, cathode output end is connect with one end of one end of inductance L2 and capacitor C43 respectively, and cathode is defeated The other end of outlet and capacitor C43 are grounded；The input terminal of third rectifier bridge is connect with the input terminal of transformer T3, anode output End is connect with one end of one end of inductance L3 and capacitor C44 respectively, and the other end of cathode output end and capacitor C44 are grounded；The The input terminal of four rectifier bridges is connect with the output end of transformer T4, cathode output end one end with inductance L4 and capacitor C45 respectively The other end of connection, cathode output end and capacitor C45 are grounded；The other end of inductance L1, the other end of inductance L2, inductance L3 The other end of the other end and inductance L4 are connect with the input terminal of inverter circuit 3；Wherein, the capacitance of capacitor C42-C45 is The capacitance of 470pF, electrolytic capacitor C46 and C47 are 100uF.
Resistance R88, R89, R90, R91 and R92, resistance R88-R90 are also connected between the input terminal and ground of inverter circuit 3 Series connection, resistance R91 and R92 series connection are simultaneously in parallel with the series circuit of R88-R90 composition, and resistance R92 is connect with circuit for alarming 5.Electricity The resistance value for hindering R88-R90 is 50*103The resistance value of Ω, resistance R91 are 440*103The resistance value of Ω, resistance R92 are 108Ω。
Specifically, inverter circuit 3 include by field-effect tube Q27, Q28, Q29, Q30, Q31, Q32, Q33, Q34, Q35, Q36, Q37, Q38, Q39, Q40, Q41, Q42, Q43, Q44, Q45, Q46, Q47 and Q48 composition H-bridge circuit, triode Q22, Q25, Q26, Q37 and Q38, resistance R38, R39, R55, R56, R57, R58, R59, R60, R61, R62, R63, R64, R65, R66, R67, R68, R69, R70, R71, R72, R73, R74, R75, R76, R77, R78, R79, R80, R81, R82, R83 and R84, two poles Pipe D11, D12, D13 and D14, capacitor C28, C29, C48 and C49, electrolytic capacitor C30, C36, C37 and C38, inductance L6 and PWM chip U3.The resistance value of resistance R59-R63, R65-R69, R74-R78, R80-R84 are 10 Ω, and the resistance value of resistance R38 is The resistance value of 2200 Ω, resistance R39 are 5100 Ω, and the resistance value of resistance R55 is 10*103Ω, resistance R56, R57, R64, R79, R71 Resistance value with R72 is 2700 Ω, and the resistance value of resistance R58, R73 are 100*103The resistance value of Ω, R70 are 10*103Ω, field effect Should pipe Q27-Q36, Q39-Q48 be all made of the enhanced metal-oxide-semiconductor IRF840 of N-channel, the capacitance of electrolytic capacitor C36, C37, C30 are The capacitance of 10uF, electrolytic capacitor C38 are 220uF, and the capacitance of capacitor C28 and C49 are 22*104The capacitance of pF, capacitor C29 are 47* 104The capacitance of pF, capacitor C48 are 22*102pF.Triode Q25, Q37 use KSP44, Q22 to use using C945, Q26 and Q38 2N2907, diode D11, D12, D13 and D14 are all made of IN4007.
Wherein, the grid of field-effect tube Q27 is connect with one end of resistance R59, the grid and resistance R60 of field-effect tube Q28 One end connection, the grid of field-effect tube Q29 connect with one end of resistance R61, and the grid of field-effect tube Q30 is with resistance R62's One end connection, the grid of field-effect tube Q31 connect with one end of resistance R63, the other end of resistance R59, resistance R60 it is another The other end at end, the other end of resistance R61, the other end of resistance R62 and resistance R63 is connected to each other, and the collection with triode Q25 Electrode, diode D12 cathode connected with one end of resistance R57, the emitter of triode Q25 ground connection, base stage passes through resistance R55 It is connect with resistance R56 with the base stage of triode Q26；The other end of resistance R57 respectively with the cathode of diode D11, electrolytic capacitor The anode of C36 is connected with one end of resistance R58, and the anode of diode D11 connects+12V voltage；Cathode, the resistance of electrolytic capacitor C36 The other end of R58 and the anode of diode D12 are connect with one end of capacitor C48；
The grid of field-effect tube Q32 is connect with one end of resistance R65, and the grid of field-effect tube Q33 and one end of resistance R66 connect It connecing, the grid of field-effect tube Q34 is connect with one end of resistance R67, and the grid of field-effect tube Q35 is connect with one end of resistance R68, The grid of field-effect tube Q36 is connect with one end of resistance R69；The other end of resistance R65, the other end of resistance R66, resistance R67 The other end, the other end of resistance R68 and the other end of resistance R69 be connected to each other, and emitter and resistance with triode Q26 One end of R64 connects, another termination+12V voltage of resistance R64, and grounded collector, the base stage of triode Q26 passes through resistance R56 It is connect with 11 pins of PWM chip；
The grid of field-effect tube Q39 is connect with one end of resistance R74, and the grid of field-effect tube Q40 and one end of resistance R75 connect It connecing, the grid of field-effect tube Q41 is connect with one end of resistance R76, and the grid of field-effect tube Q42 is connect with one end of resistance R77, The grid of field-effect tube Q43 is connect with one end of resistance R78；The other end of resistance R74, the other end of resistance R75, resistance R76 The other end, the other end of resistance R77 and the other end of resistance R78 be connected to each other, and respectively with the cathode of diode D14, electricity One end of resistance R72 is connected with the collector of triode Q37, and the emitter ground connection of triode Q37, base stage passes through resistance R70 and PWM 14 pins of chip U3 connect；The other end of resistance R72 respectively with one end of resistance R73, the anode of electrolytic capacitor C37 and two poles The cathode of pipe D13 connects；Positive access+12V the voltage of diode D13, the anode of diode D14, the other end of resistance R73 and The cathode of capacitor C37 is connected to each other, and connect with the other end of one end of inductance L6 and electrolytic capacitor C48, and the two of capacitor C49 End is connect with the other end of one end of capacitor C48 and inductance L6 respectively, and is connect with the output end of industrial frequency AC signal；
The grid of field-effect tube Q44 is connect with one end of resistance R80, and the grid of field-effect tube Q45 and one end of resistance R81 connect It connecing, the grid of field-effect tube Q46 is connect with one end of resistance R82, and the grid of field-effect tube Q47 is connect with one end of resistance R83, The grid of field-effect tube Q48 is connect with one end of resistance R84；The other end of resistance R80, the other end of resistance R81, resistance R82 The other end, the other end of resistance R83 and the other end of resistance R84 be connected to each other, and with one end of resistance R79 and triode The emitter of Q38 connects, the grounded collector of triode Q38, and base stage is connect by resistance R71 with 14 pins of PWM chip U3； Another termination+12V voltage of resistance R79；
The source electrode of field-effect tube Q27, the source electrode of field-effect tube Q28, the source electrode of field-effect tube Q29, field-effect tube Q30 source electrode, The source electrode of field-effect tube Q31, the drain electrode of field-effect tube Q32, the drain electrode of field-effect tube Q33, the drain electrode of field-effect tube Q34, field effect Should the drain electrode of pipe Q35 and the drain electrode of field-effect tube Q36 be connected to each other and one with the anode of diode D12 and capacitor C48 respectively End connection；
The drain electrode of field-effect tube Q39, the drain electrode of field-effect tube Q40, the source electrode of field-effect tube Q41, field-effect tube Q42 source electrode, The source electrode of field-effect tube Q43, the drain electrode of field-effect tube Q44, the drain electrode of field-effect tube Q45, the drain electrode of field-effect tube Q46, field effect Should the drain electrode of pipe Q47 and the drain electrode of field-effect tube Q48 be connected to each other and connect with the other end of capacitor C48；
The drain electrode of field-effect tube Q27, the drain electrode of field-effect tube Q28, the drain electrode of field-effect tube Q29, the drain electrode of field-effect tube Q30, The drain electrode of field-effect tube Q31, the source electrode of field-effect tube Q39, the source electrode of field-effect tube Q40, the drain electrode of field-effect tube Q41, field effect Should the drain electrode of pipe Q42, the drain electrode of field-effect tube Q43 connect with the other end of inductance L4；
The source electrode of field-effect tube Q32, the source electrode of field-effect tube Q33, the source electrode of field-effect tube Q34, field-effect tube Q35 source electrode, The source electrode of field-effect tube Q36, the source electrode of field-effect tube Q44, the source electrode of field-effect tube Q45, the source electrode of field-effect tube Q46, field effect Should pipe Q47 source electrode and field-effect tube Q48 source electrode with electrolytic capacitor C38 anode connect；
PWM chip U3 is KA3525, is connected between 1 pin and 9 pins by capacitor C29,3 pins and 4 pins are vacant, and 13 draw Foot and 15 pins connect and access+12V voltage, 10 pins and 12 pins ground connection, and 1 pin, 2 pins, 6 pins, 11 pins, 14 are drawn Foot and 16 pins are connect with over-and under-voltage protection circuit 4 respectively；8 pins of PWM chip U3 respectively with the collector of triode and The anode connection of electrolytic capacitor C30,7 pins and 5 pins of PWM chip U3 are connect with one end of capacitor C28；Triode Q22 The emitter other end connect and ground with the cathode of capacitor C30 and capacitor C28 respectively；The base stage of triode Q22 respectively with One end of resistance R38 is connected with one end of resistance R39, and the other end of resistance R38 is connect with the anode of capacitor C38, capacitor C38's The cathode of cathode, the other end of resistance R39 and electrolytic capacitor C30 is connected to each other and is grounded.
Specifically, over-and under-voltage protection circuit 4 include comparator A5 and A6, triode Q23 and Q24, electrolytic capacitor C31, C32, C33, C34, C35 and C41, potentiometer VR1 and VR2, diode D5, D6, D7, D8 and D9 and resistance R37, R40, R41, R42, R43, R44, R45, R46, R47, R48, R49, R50, R51, R52, R53, R54, R85, R86 and R87.Wherein, three Pole pipe Q23 and Q24 use C945, and the capacitance of electrolytic capacitor C31 is 1uF, and the capacitance of C32 is 2.2uF, and the capacitance of C33 is 33uF, The capacitance of C34 is 4.7 uF, and the capacitance of C41 is 100 uF.Diode D5- D9 is all made of IN4148.The resistance value of resistance R37 is 62*103The resistance value of Ω, R40-R42 and R46 are 47*103The resistance value of Ω, R43, R44, R48 are 10*103The resistance of Ω, R45 Value is 82*103The resistance value of Ω, R47 are 1*103The resistance value of Ω, R49 are 440*103The resistance value of Ω, R50 are 13*103Ω, R51's Resistance value is 47*103The resistance value of Ω, R52 are 56*103The resistance value of Ω, R53 are 2700 Ω, and the resistance value of R54 is 1500 Ω, R85-R87 Resistance value be 0.1R2W.
The in-phase output end of comparator A5 is connect with one end of resistance R54, and resistance R85, R86 and R87 are in parallel, and it is formed Parallel circuit one end ground connection, the other end connect with the other end of resistance R54；The reverse input end of comparator A5 passes through resistance R52 is connect with 16 pins of PWM chip U3, is grounded by resistance R53；The output end of comparator A5 by electrolytic capacitor C34 with One end of resistance R54 connects, and is connect respectively with the input terminal of the emitter of triode Q24 and circuit for alarming 5 by diode D9； The series circuit that electrolytic capacitor C32 and resistance R52 and resistance R53 are formed is in parallel, and its it is positive respectively with one end of resistance R48, The cathode of diode D5 is connected with one end of resistance R43, and the other end of resistance R48 is connect with 2 pins of PWM chip U3, two poles The anode of pipe D5 is connect with the anode of electrolytic capacitor C30, and the other end of resistance R43 is connect with the in-phase output end of comparator A6；
The reverse input end of comparator A6 connects with the cathode of one end of resistance R42, the cathode of diode D6 and diode D7 respectively It connects, the other end ground connection of resistance R42；The anode of diode D6 connects with one end of 11 pins of PWM chip U3 and resistance R40 respectively It connects, the other end ground connection of resistance R40；The anode of diode D7 connects with one end of 14 pins of PWM chip U3 and resistance R41 respectively It connects, the other end ground connection of resistance R41；6 pins of PWM chip U3 pass sequentially through resistance R37 and potentiometer VR2 ground connection；Comparator A6's connects+12V voltage and connect with the collector of the anode of electrolytic capacitor C41 and triode Q24, the cathode of electrolytic capacitor C41 Ground connection；The output end of comparator A6 is connect with the anode of one end of resistance R44 and diode D8 respectively, the other end of resistance R44 It is connect with the base stage of triode Q23, the cathode of diode D8 is connect with one end of resistance R45, the other end of resistance R45, electrolysis The base stage of the anode of capacitor C35, one end of resistance R46 and triode Q24 is connected to each other；The cathode and resistance of electrolytic capacitor C35 The other end of R46 is grounded；The emitter of triode Q23 is grounded, collector by resistance R51 respectively with 1 pin of PWM chip U3 Connection is connect with the anode of electrolytic capacitor C31, the cathode ground connection of electrolytic capacitor C31；The collector of triode Q23 passes sequentially through Potentiometer VR1 and resistance R49 are connect with inductance L4, are grounded by resistance R50；One end of resistance R47 is grounded, the other end and alarm The input terminal of circuit 5 connects.
Specifically, circuit for alarming 5 include amplifier A1, A2, A3 and A4, triode Q21, photoelectrical coupler RP1 and RP2, Light-emitting diode LED 1, loudspeaker DZ1, radiator FAN1, diode D1, D2, D3 and D4, electrolytic capacitor C5, C6, C7 and C26, Capacitor C8, C9 and C27, resistance R24, R25, R26, R27, R28, R29, R30, R31, R32, R33, R34, R35, R36 and R93, And slide rheostat TR1；Triode Q21 uses D882, and diode D1, D2, D3 and D4 use IN4148, electrolytic capacitor C5's It is the capacitance of 2.2uF, C8 and C27 is 10*10 that capacitance, which is the capacitance of 22uF, C6 and C7,4The capacitance of pF, C9 are 10*103PF, C26 Capacitance be 100uF.The resistance value of resistance R24 and R26 are 47*103The resistance value of Ω, R25 are 4.1*103The resistance value of Ω, R27 is 2.7*103The resistance value of Ω, R28 are 3.6*103The resistance value of Ω, R29, R30 and R31 are 10*103The resistance value of Ω, R32, R34, R93 For 1*103The resistance value of Ω, R33 are 100*103The resistance value of Ω, R35 are 1 Ω, and the resistance value of R36 is 4.7*103Ω。
The anode of electrolytic capacitor C5 is connect with the anode of 2 pins of PWM chip U1,8 pins and diode D4 respectively, cathode Ground connection；The cathode of diode D4 respectively with one end of the anode of electrolytic capacitor C6, one end of resistance R31, slide rheostat TR1 with And one end connection of resistance R29；The cathode of electrolytic capacitor C6 connect and connects with the cathode of one end of R33 and electrolytic capacitor C5 respectively Ground；The other end of resistance R33 is connect with one end of 1 pin of PWM chip U1 and resistance R32 respectively；The other end of resistance R32 point It is not connect with the cathode of the output end of photoelectrical coupler PR2 and diode D3；Diode D3 anode respectively with photodiode The cathode of LED1, the anode of diode D1 are connected with the output end of amplifier A1；The other end of resistance R31 respectively with amplifier A1 In-phase output end, the cathode of diode D1, the in-phase output end of amplifier A2, the cathode of diode D2, capacitor C8 one end And the output end connection of photoelectrical coupler；The other end of slide rheostat TR1 respectively with the in-phase output end of amplifier A4 and One end of resistance R27 connects；The other end of resistance R27 connects with one end of the in-phase output end of amplifier A3 and resistance R28 respectively It connects；The output end of amplifier A3 is connect with the anode of diode D2；The other end of resistance R29 is reversed defeated with amplifier A4 respectively Enter one end connection at end, the direction input terminal of amplifier A3 and resistance R30；The reverse input end of amplifier A1 respectively with resistance One end of one end of R25, the anode of electrolytic capacitor C7 and resistance R24 connects；The other end of resistance R25 respectively with amplifier A2 Reverse input end, capacitor C9 one end connected with one end of resistance R26；The output end of amplifier A2 and the other end of capacitor C9 It is connect with the anode of loudspeaker DZ1；The anode of photodiode LED1 respectively with one end of resistance R34 and resistance R93 one End connection, the other end of resistance R93 and the output end of photoelectrical coupler connect the end VCC；The input terminal of photoelectrical coupler RP1 is distinguished It is connect with the cathode of the other end of resistance R47, the emitter of triode Q24 and diode D9；
The other end of resistance R34, the cathode of loudspeaker DZ1, the other end of capacitor C8, the other end of resistance R26, resistance R28 The cathode of the other end, the other end of resistance R30 and electrolytic capacitor C7 is grounded；The other end of resistance R24 is with transformer T1's Input terminal connection, and connect by switch K1 with inductance L5；
The output end of amplifier A4 is connect by resistance R36 with the base stage of triode Q21, the collector of triode Q21 and heat dissipation One end of device FAN1 connects, and the other end of radiator FAN1 is connect with the anode of one end of inductance L5 and electrolytic capacitor C26 respectively, The other end of inductance L5 connect with one end of capacitor C27 and accesses the end VCC；The emitter of triode Q21, electrolytic capacitor C26 The other end of cathode and capacitor C27 are grounded.
A kind of inverter is also disclosed in the embodiment of the present invention, including inverter circuit as shown in Figs. 1-2.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest scope of cause.

Claims (10)

1. a kind of inverter circuit characterized by comprising voltage regulator circuit, booster circuit, inverter circuit, over-and under-voltage protection Circuit and circuit for alarming；
The DC voltage that the voltage regulator circuit inputs input terminal carries out steady pressure treatment, and extremely by the direct voltage output after pressure stabilizing The booster circuit；
DC voltage after pressure stabilizing is boosted, rectified and is filtered by the booster circuit, obtains being higher than input terminal voltage High-voltage dc signal, and the high-voltage dc signal is exported to the inverter circuit；
The high-voltage dc signal inversion is industrial frequency AC signal by H-bridge circuit by the inverter circuit, and by the power frequency AC signal output；
The over-and under-voltage protection circuit is connect with the inverter circuit, voltage condition in real-time detection circuit is used for, in electricity Pressure cuts off circuit higher or lower than signal an alert when presetting normal voltage value to the auxiliary circuit；
The circuit for alarming receives the alarm signal that the over-and under-voltage protection circuit is issued, and amplifies, and issues acousto-optic Alarm.
2. a kind of inverter circuit according to claim 1, which is characterized in that the voltage regulator circuit include voltage-stablizer U5, Electrolytic capacitor C39, C40 and diode D10, the end VIN of voltage-stablizer U5 respectively with electrolytic capacitor C39 anode and diode D10 Cathode connection, diode D10 anode connect with the input terminal of transformer T1；The OUT terminal of voltage-stablizer U5 is electric with+12V respectively Pressure and electrolytic capacitor C40 anode connection, the end GND of voltage-stablizer U5, the cathode of electrolytic capacitor C39, electrolytic capacitor C40 cathode And the input terminal of transformer T1 is connected to each other and is grounded.
3. a kind of inverter circuit according to claim 1, which is characterized in that the booster circuit include boosting unit and Rectification filtering unit；DC voltage after steady pressure treatment is carried out boosting processing by the boosting unit, obtains high-voltage square wave signal； The output end of the boosting unit is connect with the input terminal of the rectification filtering unit, and the rectification filtering unit is by high-voltage square-wave Signal carries out rectifying and wave-filtering processing, obtains high-voltage dc signal, and export to the inverter circuit.
4. a kind of inverter circuit according to claim 3, which is characterized in that the boosting unit include transformer T1, T2, T3, T4, triode Q1, Q2, Q3 and Q4, field-effect tube Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q18, Q19, Q20, resistance R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, capacitor C1, C2 and C3, electrolytic capacitor C4 and PWM chip U1；Triode Q1 and Q3 be NPN type triode, three Pole pipe Q2 and Q4 are PNP type triode；
The grid of field-effect tube Q5 is connect with one end of resistance R4, and the grid of field-effect tube Q6 and one end of R5 connect, field-effect The grid of pipe Q7 is connect with one end of resistance R6, and the grid of field-effect tube Q8 is connect with one end of resistance R7, field-effect tube Q9's Grid is connect with one end of resistance R8, and the grid of field-effect tube Q10 is connect with one end of resistance R9, the grid of field-effect tube Q11 Connect with one end of resistance R10, the grid of field-effect tube Q12 is connect with one end of resistance R11, the grid of field-effect tube Q13 with One end of resistance R12 connects, and the grid of field-effect tube Q14 is connect with one end of resistance R13, the grid and electricity of field-effect tube Q15 One end connection of R14 is hindered, the grid of field-effect tube Q16 is connect with one end of resistance R15, the grid and resistance of field-effect tube Q17 One end of R16 connects, and the grid of field-effect tube Q18 is connect with one end of resistance R17, the grid and resistance R18 of field-effect tube Q19 One end connection, the grid of field-effect tube Q20 connect with one end of resistance R19；The other end of resistance R4, resistance R5 it is another End, the other end of resistance R8, the other end of resistance R9, the other end of resistance R12, the other end of resistance R13, resistance R16 it is another The other end of one end and resistance R17 are connected to each other, and connect with the circuit for alarming；The other end of resistance R6 respectively with resistance R7 The other end, the other end of resistance R10, the other end of resistance R11, the other end of resistance R14, resistance R15 the other end, resistance The other end of R18 is connected with the other end of resistance R19, and is connect with the circuit for alarming；
The sources connected in parallel of field-effect tube Q5-Q18, Q20, and it is in parallel with the drain electrode of Q19；The drain electrode of field-effect tube Q5-Q8 is in parallel, and It is connect with the input terminal of transformer T1；The drain electrode of field-effect tube Q9-Q12 is in parallel, and connect with the input terminal of transformer T2；Field effect Should pipe Q13 and Q14 drain electrode access transformer T3 in parallel input terminal, the drain electrode parallel connection of field-effect tube Q15 and Q16 accesses transformation The input terminal of device T3；The input terminal of the drain electrode of field-effect tube Q17 and Q18 access transformer T3 in parallel, the source electrode of field-effect tube Q19 With the input terminal of the drain electrode access transformer T4 in parallel of field-effect tube Q20；
2 pins and 8 pins of PWM chip U1 connect and pass through electrolytic capacitor C5 and are grounded；Pass through capacitor between 1 pin and 9 pins C2 connection；3 pins and 4 pins are vacant；5 pins and the connection of 7 pins, and connected respectively with 10 pins and 12 pins by capacitor C1 It connects；6 pins are connect with 10 pins and 12 pins respectively by resistance R1；11 pins pass through the resistance R2 base with triode Q1 respectively Pole is connected with the base stage of triode Q2, and the base stage of triode Q1 is connect with the base stage of triode Q2, the emitter of triode Q1 with The emitter of triode Q2 connects, and connect with the other end of resistance R6；The collector of triode Q1 respectively with capacitor C3 one The anode connection at end and electrolytic capacitor C4, the other end of capacitor C3 and the cathode of electrolytic capacitor C4 are grounded, the collection of triode Q2 Electrode ground connection；10 pins and 12 pins of PWM chip U1 are grounded；14 pins of PWM chip U1 are by resistance R3 respectively with three Pole pipe Q3 is connected with the base stage of triode Q4, and the collector of triode Q3 is connected with the collector of triode Q1, triode Q3's Emitter is connect with the emitter of triode Q4, and is connect with the other end of resistance R5；The grounded collector of triode Q4；PWM 13 pins of chip U1 and the connection of 15 pins, 15 pins of PWM chip U1 are connect with the end VCC, and pass through inductance L5 and transformer The input terminal of T1 connects, and switch K1 is connected between inductance L5 and the input terminal of transformer T1；The input terminal of transformer T1 and institute Voltage regulator circuit connection is stated, the output end of transformer T1, T2, T3 and T4 are connect with the input terminal of the rectification filtering unit.
5. a kind of inverter circuit according to claim 4, which is characterized in that the boosting unit further includes protective tube F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, electrolytic capacitor C10, C11, C12, C13, C14, C15, C16, C17,C18,C19,C20,C21；Resistance R20 and capacitor are in series between the input terminal of transformer T1 and the source electrode of field-effect tube Q6 C22；Electrolytic capacitor C10, C11 and C12 are in parallel, and its anode is connect with the input terminal of transformer T1 and protective tube F1-F3, Cathode is grounded；
Resistance R21 and capacitor C23 are in series between the drain electrode of the input terminal and field-effect tube Q9 of transformer T2；Electrolytic capacitor C13, C14 and C15 is in parallel, and its anode is connect with the input terminal of transformer T2 and protective tube F4-F6, and cathode is grounded；Transformation Resistance R22 and capacitor C24 are in series between the drain electrode of the input terminal and field-effect tube Q13 of device T3；Electrolytic capacitor C16, C17 and C18 is in parallel, and its anode is connect with the input terminal of transformer T3 and protective tube F7-F9, and cathode is grounded；Transformer T4's Resistance R23 and capacitor C25 are in series between input terminal and field-effect tube Q17, electrolytic capacitor C19, C20 and C21 are in parallel, and it is just It is extremely connect with the input terminal of transformer T4 and protective tube F10-F12, cathode is grounded.
6. a kind of inverter circuit according to claim 3, which is characterized in that the rectification filtering unit includes by two poles First rectifier bridge of pipe D15-D18 composition, the second rectifier bridge being made of diode D19-D22 are made of diode D23-D26 Third rectifier bridge, the 4th rectifier bridge, capacitor C42, C43, C44 and C45, the electrolytic capacitor C46 that are made of diode D27-D30 With C47, inductance L1, L2, L3 and L4；The input terminal of first rectifier bridge is connect with the output end of transformer T1, the first rectifier bridge Cathode output end is connect with one end of one end of inductance L1 and capacitor C42 respectively, and the other end of inductance L1 is with electrolytic capacitor C46's Anode connection, electrolytic capacitor C46 and C47 series connection；The cathode output end of first rectifier bridge, the other end of capacitor C42 and electrolysis electricity The cathode for holding C47 is grounded；The input terminal of second rectifier bridge is connect with the output end of transformer T2, cathode output end respectively with electricity One end of sense L2 is connected with one end of capacitor C43, and the other end of cathode output end and capacitor C43 are grounded；Third rectifier bridge Input terminal is connect with the input terminal of transformer T3, and cathode output end is connect with one end of one end of inductance L3 and capacitor C44 respectively, The other end of cathode output end and capacitor C44 are grounded；The input terminal of 4th rectifier bridge is connect with the output end of transformer T4, just Pole output end is connect with one end of inductance L4 and capacitor C45 respectively, and the other end of cathode output end and capacitor C45 are grounded；Electricity Feel the other end of L1, the other end of inductance L2, the other end of inductance L3 and inductance L4 the other end with the inverter circuit Input terminal connection；
Resistance R88, R89, R90, R91 and R92, resistance R88-R90 are also connected between the input terminal and ground of the inverter circuit Series connection, resistance R91 and R92 series connection are simultaneously in parallel with the series circuit of R88-R90 composition, and resistance R92 is connect with the circuit for alarming.
7. a kind of inverter circuit according to claim 1, which is characterized in that the inverter circuit includes by field-effect tube Q27、Q28、Q29、Q30、Q31、Q32、Q33、Q34、Q35、Q36、Q37、Q38、Q39、Q40、Q41、Q42、Q43、Q44、Q45、 Q46, Q47 and Q48 composition H-bridge circuit, triode Q22, Q25, Q26, Q37 and Q38, resistance R38, R39, R55, R56, R57, R58、R59、R60、R61、R62、R63、R64、R65、R66、R67、R68、R69、R70、R71、R72、R73、R74、R75、R76、 R77, R78, R79, R80, R81, R82, R83 and R84, diode D11, D12, D13 and D14, capacitor C28, C29, C48 and C49, Electrolytic capacitor C30, C36, C37 and C38, inductance L6 and PWM chip U3；Wherein triode Q22, Q25 and Q37 is NPN type three Pole pipe, Q26 and Q38 are PNP type triode；
Wherein, the grid of field-effect tube Q27 is connect with one end of resistance R59, the grid of field-effect tube Q28 and the one of resistance R60 End connection, the grid of field-effect tube Q29 are connect with one end of resistance R61, the grid of field-effect tube Q30 and one end of resistance R62 Connection, the grid of field-effect tube Q31 are connect with one end of resistance R63, the other end of resistance R59, the other end of resistance R60, electricity Resistance R61 the other end, the other end of resistance R62 and the other end of resistance R63 be connected to each other, and with the collector of triode Q25, The cathode of diode D12 is connected with one end of resistance R57, and the emitter ground connection of triode Q25, base stage passes through resistance R55 and electricity Resistance R56 is connect with the base stage of triode Q26；The other end of resistance R57 respectively with the cathode of diode D11, electrolytic capacitor C36 Anode is connected with one end of resistance R58, and the anode of diode D11 connects+12V voltage；The cathode of electrolytic capacitor C36, resistance R58 The anode of the other end and diode D12 are connect with one end of capacitor C48；
The grid of field-effect tube Q32 is connect with one end of resistance R65, and the grid of field-effect tube Q33 and one end of resistance R66 connect It connecing, the grid of field-effect tube Q34 is connect with one end of resistance R67, and the grid of field-effect tube Q35 is connect with one end of resistance R68, The grid of field-effect tube Q36 is connect with one end of resistance R69；The other end of resistance R65, the other end of resistance R66, resistance R67 The other end, the other end of resistance R68 and the other end of resistance R69 be connected to each other, and emitter and resistance with triode Q26 One end of R64 connects, another termination+12V voltage of resistance R64, and grounded collector, the base stage of triode Q26 passes through resistance R56 It is connect with 11 pins of PWM chip；
The grid of field-effect tube Q39 is connect with one end of resistance R74, and the grid of field-effect tube Q40 and one end of resistance R75 connect It connecing, the grid of field-effect tube Q41 is connect with one end of resistance R76, and the grid of field-effect tube Q42 is connect with one end of resistance R77, The grid of field-effect tube Q43 is connect with one end of resistance R78；The other end of resistance R74, the other end of resistance R75, resistance R76 The other end, the other end of resistance R77 and the other end of resistance R78 be connected to each other, and respectively with the cathode of diode D14, electricity One end of resistance R72 is connected with the collector of triode Q37, and the emitter ground connection of triode Q37, base stage passes through resistance R70 and PWM 14 pins of chip U3 connect；The other end of resistance R72 respectively with one end of resistance R73, the anode of electrolytic capacitor C37 and two poles The cathode of pipe D13 connects；Positive access+12V the voltage of diode D13, the anode of diode D14, the other end of resistance R73 and The cathode of capacitor C37 is connected to each other, and connect with the other end of one end of inductance L6 and electrolytic capacitor C48, and the two of capacitor C49 End is connect with the other end of one end of capacitor C48 and inductance L6 respectively, and is connect with the output end of industrial frequency AC signal；
The grid of field-effect tube Q44 is connect with one end of resistance R80, and the grid of field-effect tube Q45 and one end of resistance R81 connect It connecing, the grid of field-effect tube Q46 is connect with one end of resistance R82, and the grid of field-effect tube Q47 is connect with one end of resistance R83, The grid of field-effect tube Q48 is connect with one end of resistance R84；The other end of resistance R80, the other end of resistance R81, resistance R82 The other end, the other end of resistance R83 and the other end of resistance R84 be connected to each other, and with one end of resistance R79 and triode The emitter of Q38 connects, the grounded collector of triode Q38, and base stage is connect by resistance R71 with 14 pins of PWM chip U3； Another termination+12V voltage of resistance R79；
The source electrode of field-effect tube Q27, the source electrode of field-effect tube Q28, the source electrode of field-effect tube Q29, field-effect tube Q30 source electrode, The source electrode of field-effect tube Q31, the drain electrode of field-effect tube Q32, the drain electrode of field-effect tube Q33, the drain electrode of field-effect tube Q34, field effect Should the drain electrode of pipe Q35 and the drain electrode of field-effect tube Q36 be connected to each other and one with the anode of diode D12 and capacitor C48 respectively End connection；
The drain electrode of field-effect tube Q39, the drain electrode of field-effect tube Q40, the source electrode of field-effect tube Q41, field-effect tube Q42 source electrode, The source electrode of field-effect tube Q43, the drain electrode of field-effect tube Q44, the drain electrode of field-effect tube Q45, the drain electrode of field-effect tube Q46, field effect Should the drain electrode of pipe Q47 and the drain electrode of field-effect tube Q48 be connected to each other and connect with the other end of capacitor C48；
The drain electrode of field-effect tube Q27, the drain electrode of field-effect tube Q28, the drain electrode of field-effect tube Q29, the drain electrode of field-effect tube Q30, The drain electrode of field-effect tube Q31, the source electrode of field-effect tube Q39, the source electrode of field-effect tube Q40, the drain electrode of field-effect tube Q41, field effect Should the drain electrode of pipe Q42, the drain electrode of field-effect tube Q43 connect with the other end of inductance L4；
The source electrode of field-effect tube Q32, the source electrode of field-effect tube Q33, the source electrode of field-effect tube Q34, field-effect tube Q35 source electrode, The source electrode of field-effect tube Q36, the source electrode of field-effect tube Q44, the source electrode of field-effect tube Q45, the source electrode of field-effect tube Q46, field effect Should pipe Q47 source electrode and field-effect tube Q48 source electrode with electrolytic capacitor C38 anode connect；
PWM chip U3 is KA3525, is connected between 1 pin and 9 pins by capacitor C29,3 pins and 4 pins are vacant, and 13 draw Foot and 15 pins connect and access+12V voltage, 10 pins and 12 pins ground connection, and 1 pin, 2 pins, 6 pins, 11 pins, 14 are drawn Foot and 16 pins protect circuit connection with the over-and under-voltage respectively；8 pins of PWM chip U3 respectively with the collector of triode With the anode connection of electrolytic capacitor C30,7 pins and 5 pins of PWM chip U3 are connect with one end of capacitor C28；Triode The emitter of the Q22 other end connect and ground with the cathode of capacitor C30 and capacitor C28 respectively；The base stage of triode Q22 is distinguished It is connect with one end of one end of resistance R38 and resistance R39, the other end of resistance R38 is connect with the anode of capacitor C38, capacitor C38 Cathode, the other end of resistance R39 and the cathode of electrolytic capacitor C30 be connected to each other and be grounded.
8. a kind of inverter circuit according to claim 1, which is characterized in that over-and under-voltage protection circuit include than Compared with device A5 and A6, triode Q23 and Q24, electrolytic capacitor C31, C32, C33, C34, C35 and C41, potentiometer VR1 and VR2, two Pole pipe D5, D6, D7, D8 and D9 and resistance R37, R40, R41, R42, R43, R44, R45, R46, R47, R48, R49, R50, R51, R52, R53, R54, R85, R86 and R87；Triode Q23 and Q24 are NPN type triode；
The in-phase output end of comparator A5 is connect with one end of resistance R54, and resistance R85, R86 and R87 is in parallel, and its composition and Join circuit on one side ground connection, the other end is connect with the other end of resistance R54；The reverse input end of comparator A5 by resistance R52 with 16 pins of PWM chip U3 connect, and are grounded by resistance R53；The output end of comparator A5 passes through electrolytic capacitor C34 and resistance One end of R54 connects, and is connect respectively with the input terminal of the emitter of triode Q24 and the circuit for alarming by diode D9； The series circuit that electrolytic capacitor C32 and resistance R52 and resistance R53 are formed is in parallel, and its it is positive respectively with one end of resistance R48, The cathode of diode D5 is connected with one end of resistance R43, and the other end of resistance R48 is connect with 2 pins of PWM chip U3, two poles The anode of pipe D5 is connect with the anode of electrolytic capacitor C30, and the other end of resistance R43 is connect with the in-phase output end of comparator A6；
The reverse input end of comparator A6 connects with the cathode of one end of resistance R42, the cathode of diode D6 and diode D7 respectively It connects, the other end ground connection of resistance R42；The anode of diode D6 connects with one end of 11 pins of PWM chip U3 and resistance R40 respectively It connects, the other end ground connection of resistance R40；The anode of diode D7 connects with one end of 14 pins of PWM chip U3 and resistance R41 respectively It connects, the other end ground connection of resistance R41；6 pins of PWM chip U3 pass sequentially through resistance R37 and potentiometer VR2 ground connection；Comparator A6's connects+12V voltage and connect with the collector of the anode of electrolytic capacitor C41 and triode Q24, the cathode of electrolytic capacitor C41 Ground connection；The output end of comparator A6 is connect with the anode of one end of resistance R44 and diode D8 respectively, the other end of resistance R44 It is connect with the base stage of triode Q23, the cathode of diode D8 is connect with one end of resistance R45, the other end of resistance R45, electrolysis The base stage of the anode of capacitor C35, one end of resistance R46 and triode Q24 is connected to each other；The cathode and resistance of electrolytic capacitor C35 The other end of R46 is grounded；The emitter of triode Q23 is grounded, collector by resistance R51 respectively with 1 pin of PWM chip U3 Connection is connect with the anode of electrolytic capacitor C31, the cathode ground connection of electrolytic capacitor C31；The collector of triode Q23 passes sequentially through Potentiometer VR1 and resistance R49 are connect with inductance L4, are grounded by resistance R50；One end of resistance R47 is grounded, the other end with it is described The input terminal of circuit for alarming connects.
9. a kind of inverter circuit according to claim 8, which is characterized in that the circuit for alarming include amplifier A1, A2, A3 and A4, triode Q21, photoelectrical coupler RP1 and RP2, Light-emitting diode LED 1, loudspeaker DZ1, radiator FAN1, two Pole pipe D1, D2, D3 and D4, electrolytic capacitor C5, C6, C7 and C26, capacitor C8, C9 and C27, resistance R24, R25, R26, R27, R28, R29, R30, R31, R32, R33, R34, R35, R36 and R93 and slide rheostat TR1；Triode Q21 is NPN type three Pole pipe；
The anode of electrolytic capacitor C5 is connect with the anode of 2 pins of PWM chip U1,8 pins and diode D4 respectively, and cathode connects Ground；The cathode of diode D4 respectively with the anode of electrolytic capacitor C6, one end of resistance R31, slide rheostat TR1 one end and One end of resistance R29 connects；The cathode of electrolytic capacitor C6 connect and connects with the cathode of one end of R33 and electrolytic capacitor C5 respectively Ground；The other end of resistance R33 is connect with one end of 1 pin of PWM chip U1 and resistance R32 respectively；The other end of resistance R32 point It is not connect with the cathode of the output end of photoelectrical coupler PR2 and diode D3；Diode D3 anode respectively with photodiode The cathode of LED1, the anode of diode D1 are connected with the output end of amplifier A1；The other end of resistance R31 respectively with amplifier A1 In-phase output end, the cathode of diode D1, the in-phase output end of amplifier A2, the cathode of diode D2, capacitor C8 one end And the output end connection of photoelectrical coupler；The other end of slide rheostat TR1 respectively with the in-phase output end of amplifier A4 and One end of resistance R27 connects；The other end of resistance R27 connects with one end of the in-phase output end of amplifier A3 and resistance R28 respectively It connects；The output end of amplifier A3 is connect with the anode of diode D2；The other end of resistance R29 is reversed defeated with amplifier A4 respectively Enter one end connection at end, the direction input terminal of amplifier A3 and resistance R30；The reverse input end of amplifier A1 respectively with resistance One end of one end of R25, the anode of electrolytic capacitor C7 and resistance R24 connects；The other end of resistance R25 respectively with amplifier A2 Reverse input end, capacitor C9 one end connected with one end of resistance R26；The output end of amplifier A2 and the other end of capacitor C9 It is connect with the anode of loudspeaker DZ1；The anode of photodiode LED1 respectively with one end of resistance R34 and resistance R93 one End connection, the other end of resistance R93 and the output end of photoelectrical coupler connect the end VCC；The input terminal of photoelectrical coupler RP1 is distinguished It is connect with the cathode of the other end of resistance R47, the emitter of triode Q24 and diode D9；
The other end of resistance R34, the cathode of loudspeaker DZ1, the other end of capacitor C8, the other end of resistance R26, resistance R28 The cathode of the other end, the other end of resistance R30 and electrolytic capacitor C7 is grounded；The other end of resistance R24 is with transformer T1's Input terminal connection, and connect by switch K1 with inductance L5；
The output end of amplifier A4 is connect by resistance R36 with the base stage of triode Q21, the collector of triode Q21 and heat dissipation One end of device FAN1 connects, and the other end of radiator FAN1 is connect with the anode of one end of inductance L5 and electrolytic capacitor C26 respectively, The other end of inductance L5 connect with one end of capacitor C27 and accesses the end VCC；The emitter of triode Q21, electrolytic capacitor C26 The other end of cathode and capacitor C27 are grounded.
10. a kind of inverter, which is characterized in that including such as described in any item inverter circuits of claim 1-9.
CN201811187214.9A 2018-10-12 2018-10-12 Inverter circuit and inverter Active CN109067221B (en)

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