CN110071641B - Power conversion and supply circuit and operation method thereof - Google Patents
Power conversion and supply circuit and operation method thereof Download PDFInfo
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- CN110071641B CN110071641B CN201910314096.1A CN201910314096A CN110071641B CN 110071641 B CN110071641 B CN 110071641B CN 201910314096 A CN201910314096 A CN 201910314096A CN 110071641 B CN110071641 B CN 110071641B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
Abstract
The invention discloses a power conversion and supply circuit, which comprises a voltage control circuit, an oscillation circuit, a transformer, a power output circuit and a power conversion state monitoring circuit, wherein the voltage control circuit is used for changing the voltage of a control signal into a proper voltage value, the oscillation circuit converts an input direct current voltage signal into an alternating current oscillation signal with specific frequency, the transformer is used for isolating front and rear stages and respectively transmitting the signal, the signal is converted into direct current driving voltage through filtering and rectification, and the conduction of the power output circuit of a power supply battery and the power conversion state monitoring circuit is controlled, the operation method of the circuit is also disclosed, the switching control of the ground power supply and the battery power supply of a system is realized, the circuit has the functions of combining output of two power supply lines, power conversion state monitoring and the like, the circuit has a simple structure, the transformer is used for isolating the front and rear stages, has higher isolation voltage, and the redundancy, the circuit has strong expandability, can not only enlarge the current capability and reduce the power consumption, but also meet the requirement of a redundancy design.
Description
Technical Field
The invention belongs to the technical field of semiconductor integrated circuit design, and particularly relates to a power conversion and supply circuit and an operation method thereof.
Background
The power conversion circuit is a widely used electronic product for conversion control of power supply. The conventional power conversion and supply circuit is large in size, heavy in weight and high in thickness, is not suitable for the miniaturization requirement of the conventional integrated circuit, and does not meet the requirements of ensuring small on-resistance and small power consumption of a VDMOS (vertical double-diffused metal oxide semiconductor) while combining output of two power supply circuits. Therefore, a highly reliable power conversion and supply circuit based on an aluminum-based heat dissipation technology is urgently needed, the miniaturization design of the circuit is realized while the functions of power supply, power supply conversion control, combined output of two power supply lines and power conversion state monitoring are completed, and the heat dissipation performance is good.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a power conversion and supply circuit, which achieves the miniaturization design of the circuit and good heat dissipation performance while finishing the functions of power supply, power supply conversion control, combined output of two power supply lines and power conversion state monitoring.
In order to achieve the purpose, the invention adopts the technical scheme that the power conversion and supply circuit comprises a voltage control circuit, an oscillating circuit, a transformer, a rectifying and filtering circuit, a power output circuit and a power conversion state monitoring circuit; the output end of the control circuit is connected with the input end of the oscillating circuit, and the output end of the transformer is connected with the power output circuit; the voltage control circuit is used for adjusting the voltage of the power supply control signal;
the oscillating circuit is used for converting a direct-current voltage signal into an alternating-current oscillating signal, a primary winding of the transformer adopts a single winding T1, and a secondary winding adopts double windings and comprises a secondary winding T2 and a secondary winding T3; the secondary winding T2 is connected into the power output circuit and used for driving a VDMOS tube, so that the on-off of the battery output circuit is controlled; the oscillating circuit outputs a signal through a primary winding T1;
the power conversion state monitoring circuit comprises a triode Q7 and a monitoring end, a secondary winding T3 is connected into the power conversion state monitoring circuit and used for driving a power conversion triode Q7, and two ends of the secondary winding T3 are respectively connected with a base electrode and an emitting electrode of a triode Q7; an emitting electrode of the triode Q7 is connected with a monitoring end, and a collector electrode of the triode Q7 is connected with the positive electrode of the input end of the power output circuit; the rectification filter circuit is used for converting the alternating current oscillation signal into a direct current signal and is connected with the power output circuit;
the power output circuit comprises four VDMOS tubes, a voltage regulator tube D6 and four grid resistors; each VDMOS tube is respectively connected with a grid resistor, one end of each grid resistor is connected with the G pole of the VDMOS tube, and the other end of each grid resistor is connected with the negative pole of a voltage regulator tube D6; the four VDMOS tubes are connected in parallel two by two and then are connected in series; one end of the series group is grounded on VCC1, the output end and the anode of a voltage regulator tube D6, and the other end is connected with a battery VCC 2.
The power supply control signal in the control circuit comprises a control signal VEE1And a control signal VEE2Power supply control signal VEE1The control signal V is input to the anode of the diode D1EE2The anode of the input diode D2; the diode D1 and the diode D2 are connected in parallel and then connected with the cathode of a voltage regulator tube D5, the anode of the voltage regulator tube D5 is connected with the resistor R1, and the other end of the resistor R1 is connected with the input end of the oscillating circuit.
The oscillating circuit comprises a biasing resistor R2, a biasing resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, an NPN type triode Q1 and an inductor L, wherein one end of the capacitor C1 and one end of the resistor R2 which are connected in parallel are connected with the base electrode of the NPN type triode Q1;
two ends of the resistor R2 and the resistor R4 are connected in series and then connected in parallel with the capacitor C2, and two ends of the capacitor C2 are connected with the base electrode and the emitter electrode of the NPN type triode Q1;
an emitter and a collector of the NPN type triode Q1 are respectively connected with two ends of a capacitor C3, the other end of a parallel circuit of R2 and C1 is connected with one end of an inductor L1, and the other end of an inductor L1 is connected with a collector of an NPN type triode Q1.
The rectifying and filtering circuit comprises a diode D3, a diode D4, a capacitor C4, a resistor R5, a resistor R6 and a triode Q2, the diode D3 is connected with the diode D4 in series, the negative electrode of the diode D4 is connected with the emitter of a triode Q2, the collector of the triode Q2 is connected with one end of a resistor R6, the capacitor C4 is connected with the resistor R5 in parallel, one end of the resistor R5 is connected with the base of the triode Q2 and the positive electrode of the diode D4, and the other end of the resistor R6 is connected with the other end of the resistor R5; the anode of the diode D3 is connected to one end of the secondary winding T2, and the collector of the transistor Q2 is connected to the other end of the secondary winding T2.
The power output circuit comprises a gate resistor R7, a gate resistor R8, a gate resistor R9, a gate resistor R10, a VDMOS tube Q3, a VDMOS tube Q4, a VDMOS tube Q5 and a VDMOS tube Q6; the VDMOS transistor Q3 is connected with the gate resistor R7, the VDMOS transistor Q4 is connected with the gate resistor R8, the VDMOS transistor Q5 is connected with the gate resistor R9, and the VDMOS transistor Q6 is connected with the gate resistor R10; the S poles of the VDMOS tube Q4 and the VDMOS tube Q6 are connected with the ground VCC1, the anode of the voltage regulator tube D6 and the output end, and the D poles of the VDMOS tube Q3 and the VDMOS tube Q5 are connected with the battery VCC 2; the VDMOS tubes in the power output circuit are all N-type VDMOS tubes.
The resistance value of the grid resistor is 1K-2K.
The power conversion state monitoring circuit further comprises a diode D9, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C5 and a voltage regulator tube D8, wherein one end of a secondary winding T3 is connected with one end of the capacitor C5, the other end of the secondary winding T3 is connected with the anode of a diode D9, the cathode of the diode D9 is connected with the other end of the capacitor C5 and one end of the resistor R11, the other end of the resistor R11 is connected with the base of a triode Q7, and the base of the triode Q7 is further connected with the cathode of the voltage regulator tube D8;
one end of the resistor R13 and the resistor R14 which are connected in parallel is connected with the anode of the voltage regulator tube D6, and the other end of the resistor R13 and the resistor R14 which are connected in parallel is connected with the collector of the triode Q7; an emitting electrode of the triode Q7 is connected with the resistor R15 and a monitoring end, one end of the resistor R15 is connected with the anode of the voltage regulator tube D8, and the voltage regulator tube D8 is connected with the resistor R12 in parallel.
An integrated circuit structure based on an aluminum substrate is adopted, and all components are surface-mounted weldable devices and are arranged on the upper layer of the substrate.
According to the operation method of the power conversion and supply circuit, the control signal voltage is converted into a voltage value suitable for being input into the oscillating circuit through the voltage control circuit and is output to the oscillating circuit;
the oscillating circuit converts an input direct-current voltage signal into an alternating-current oscillating signal with specific frequency, a transformer is adopted to isolate a front stage and a rear stage and respectively transmit the signals, the signals are converted into direct-current driving voltage through a filter rectifying circuit and are output to a power output circuit, and the power output circuit of the power supply battery is controlled to realize the switching between the ground power supply and the battery power supply of the system.
When the control signal VEE1And a control signal VEE2When all are not sent out, only the ground power supply V is usedCC1Supplying power through an output end; when one of the control signals is sent out, the battery VCC2The path is conducted, power is supplied through the output end, and the two paths are combined for output; when the ground power supply VCC1After shut down, the battery VCC2The path is still conducted and works normally; the power output circuit has system ground power supply and battery power supply combined output, and two output paths share one output end.
Compared with the prior art, the invention has at least the following beneficial effects: the integrated circuit design technology based on the aluminum substrate is adopted, the power supply and control of the converter are miniaturized and integrated, and the heat dissipation performance is good; the system realizes the switching control of the power supply of the system ground power supply and the power supply of the battery, and has the functions of combining output of two power supply lines, monitoring the power conversion state and the like; the circuit has simple structure, adopts the transformer to realize the front-stage and rear-stage isolation, and has higher isolation voltage; the power output circuit adopts N-type VDMOS tubes, four N-type VDMOS tubes are connected in series in a mode of two-phase parallel connection and two-group phase parallel connection, and each VDMOS is connected with a grid resistor with a larger resistance value, so that the circuit can still normally work no matter any one VDMOS is damaged, the requirement of redundancy design is met, and the circuit can still normally work when a certain power VDMOS is damaged; the circuit has strong expandability, and the current capability of the circuit can be expanded and the power consumption can be reduced through the series-parallel power devices, and the application in the circuit needing redundancy design can be met.
Furthermore, the resistance value of the gate resistor is 1K-2K, so that the gate voltage of other 3 VDMOS tubes is prevented from being reduced after the gate of one VDMOS tube is broken down, and the conduction path of the VDMOS tube is not influenced.
Furthermore, the circuit adopts an integrated circuit structure based on an aluminum substrate, and all components are surface-mounted weldable devices which are arranged on the upper layer of the substrate, so that a good heat dissipation effect can be achieved.
Drawings
FIG. 1 is an electrical schematic block diagram of a power conversion supply circuit;
FIG. 2 is a detailed schematic diagram of the power conversion and supply circuit;
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description.
As shown in fig. 1 and 2, the present invention provides a power conversion and supply circuit, which includes a voltage control circuit, an oscillation circuit, a transformer, a power output circuit, and a power conversion state monitoring circuit.
As shown in fig. 2, the voltage control circuit is configured to select two power supply control signals of the system from two power supply control signals, and then the voltage of the control signal is changedThe voltage value suitable for the input of the oscillating circuit is adjusted, and the normal and reliable work of the rear-stage oscillating circuit is ensured; power supply control signal VEE1The control signal V is input to the anode of the diode D1EE2The anode of the input diode D2; the two paths are connected in parallel and then connected with the cathode of a voltage regulator tube D5, the anode of a voltage regulator tube D5 is connected with one end of a resistor R1, and the other end of the resistor R1 is connected with the input end of an oscillating circuit; when the control signal voltage changes, the voltage value of the input end of the oscillating circuit is changed by adjusting the parameter values of the resistor R1 and the voltage regulator tube D5, so that the voltage value is in the range required by the normal operation of the oscillating circuit.
As shown in fig. 2, the oscillation circuit includes a bias resistor R2, a bias resistor R3, a bias resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, an NPN transistor Q1, and an inductor L, i.e., a primary winding T1 of the transformer; one end of the capacitor C1 and the resistor R1 after being connected in parallel is connected with the base electrode of an NPN type triode Q1; two ends of the resistor R2 and the resistor R4 are connected in series and then connected in parallel with the capacitor C2, and two ends of the capacitor C2 are connected with the base electrode and the emitter electrode of the NPN type triode Q1; an emitter and a collector of the NPN type triode Q1 are respectively connected with two ends of a capacitor C3, the other end of a parallel circuit of R2 and C1 is connected with one end of an inductor L1, and the other end of an inductor L1 is connected with a collector of a triode Q1.
The base DC bias of the triode Q1 is set through a bias resistor R2 and a bias resistor R3; when the input end of the oscillating circuit receives a normal voltage value signal, the capacitor C2, the capacitor C3 and the primary winding T1 form an oscillating circuit, and self-oscillation is generated on the basis that a phase balance condition and an amplitude balance condition are met; the output amplitude is adjusted through a triode Q1, so that the oscillation tends to be stable; in the process of oscillating waveform, the bias resistor R4 plays a role of stabilizing a working point on one hand and participates in feedback on the other hand, so that the triode Q1 is turned off; the transistor Q1 is an NPN transistor.
As shown in fig. 2, the primary winding of the transformer adopts a single winding mode, the secondary winding adopts a double winding mode, the two groups of secondary windings have different functions, and the secondary winding T2 is connected with a power output circuit in back for driving a VDMOS transistor Q3, a VDMOS transistor Q4, a VDMOS transistor Q5 and a VDMOS transistor Q6 in the power output circuit to control the on-off of the battery output path; the rear part of the secondary winding T3 is connected with a power conversion state monitoring circuit for driving a triode Q7 and controlling a power conversion state signal, and a transformer is adopted to enable the front stage and the rear stage to have higher isolation voltage.
As shown in fig. 2, the power output circuit adopts a redundant design, so that high reliability of the high-power switch circuit is realized; the current sharing design is adopted, so that the problem of large switch power consumption is solved; the power output circuit comprises a voltage regulator tube D6, a gate resistor R7, a gate resistor R8, a gate resistor R9, a gate resistor R10, a VDMOS tube Q3, a VDMOS tube Q4, a VDMOS tube Q5 and a VDMOS tube Q6, the VDMOS tubes adopted by the power output circuit are all N-type VDMOS tubes, and the on-resistance of the VDMOS tubes is small; each VDMOS tube is connected with a grid resistor, one end of each grid resistor is connected with the G pole of the VDMOS tube, and the other end of each grid resistor is connected with the negative pole of a voltage regulator tube D6.
An N-type VDMOS tube Q3 is connected with an N-type VDMOS tube Q5 in parallel, an N-type VDMOS tube Q4 is connected with an N-type VDMOS tube Q6 in parallel, and the two groups are connected in series; an N-type VDMOS tube Q3 is connected with a gate resistor R7, an N-type VDMOS tube Q4 is connected with a gate resistor R8, an N-type VDMOS tube Q5 is connected with a gate resistor R9, and an N-type VDMOS tube Q6 is connected with a gate resistor R10; the N-type VDMOS tube Q4 and the S pole of the N-type VDMOS tube Q6 are connected with the ground VCC1, the anode of the voltage regulator tube D6 and the output end, and the D poles of the N-type VDMOS tube Q3 and the N-type VDMOS tube Q5 are connected with the battery VCC 2.
As shown in fig. 2, the power output circuit can realize the combined output function of system ground power supply and battery power supply, and two output paths share one output end; the N-type VDMOS with small on-resistance is adopted, so that the power consumption can be effectively reduced; the output end is connected with the source electrodes of an N-type VDMOS tube Q4 and an N-type VDMOS tube Q6; when the control signal VEE1And VEE2When all are not sent out, only the ground power supply V is usedCC1Supplying power through an output end; when one of the control signals is sent out, the battery VCC2The path is conducted, power is supplied through the output end, and the two paths are combined for output; when the ground power supply VCC1After shut down, the battery VCC2The path is still conducted and works normally.
As shown in fig. 2, the rectifying and filtering circuit includes a diode D3, a diode D4, a capacitor C4, a resistor R5, a resistor R6, and a transistor Q2, the diode D3 is connected in series with the diode D4, a negative electrode of the diode D4 is connected to an emitter of the transistor Q2, a collector of the transistor Q2 is connected to one end of the resistor R6, the capacitor C4 is connected in parallel with the resistor R5, one end of the resistor R5 is connected to a base of the transistor Q2 and a positive electrode of the diode D4, and the other end of the resistor R6 is connected to the other end of the resistor R5; the anode of the diode D3 is connected to one end of the secondary winding T2, and the collector of the transistor Q2 is connected to the other end of the secondary winding T2.
As shown in fig. 2, the power conversion state monitoring circuit includes a transformer secondary winding T3, a diode D9, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C5, a triode Q7 and a voltage regulator D8, wherein one end of the secondary winding T3 is connected to one end of the capacitor C5, the other end of the secondary winding T3 is connected to the anode of the diode D9, the cathode of the diode D9 is connected to the other end of the capacitor C5 and one end of the resistor R11, the other end of the resistor R11 is connected to the base of the triode Q7, and the base of the triode Q7 is also connected to the cathode of the voltage regulator D8;
one end of the resistor R13 and the resistor R14 after being connected in parallel is connected with the anode of a voltage regulator tube D6, and the other end of the resistor R13 and the resistor R14 are connected with the collector of a triode Q7; an emitting electrode of the triode Q7 is connected with the resistor R15 and a monitoring end, one end of the resistor R15 is connected with the anode of the voltage regulator tube D8, the voltage regulator tube D8 is connected with the resistor R12 in parallel, and the anode of the voltage regulator tube D8 is connected with the inside of the equipment and grounded.
The power conversion state monitoring circuit adopts a transformer secondary winding T3 to drive a triode Q7, so that ground V is realizedCC1And a battery VCC2Monitoring the switching state of the two power supplies; when the control signal VEE1And VEE2When the signals are not sent out, the secondary winding T2 and the secondary winding T3 have no output, and the grid-source voltage difference V of the VDMOS isGSEmitter junction voltage difference V with triode Q7BEAll of the voltage values are 0, the VDMOS tube Q3, the VDMOS tube Q4, the VDMOS tube Q5, the VDMOS tube Q6 and the triode Q7 are all in a turn-off state, the battery access is disconnected, the output voltage value of the monitoring end is a low level, the power supply is not switched, and the battery access is still in a turn-off state; when one of the control signals is sent out, the transformer works, signals of the secondary winding T2 and the secondary winding T3 are rectified and filtered to drive the VDMOS tube Q3, the VDMOS tube Q4, the VDMOS tube Q5, the VDMOS tube Q6 and the triode Q7 to be respectively conducted, namely the battery channel is conducted, and meanwhile, the output voltage value of the monitoring end is highFlat VHIndicating that the power supply has been successfully switched.
The circuit adopts an integrated circuit design technology based on an aluminum substrate, and all components are surface-mounted weldable devices and are distributed on the upper layer of the substrate; the aluminum substrate is a metal circuit board material, consists of three layers, namely a conductive layer, a heat conduction insulating layer and a metal aluminum substrate, is suitable for a Surface Mounting Technology (SMT) for power components, is beneficial to miniaturization integration, and has an excellent heat dissipation effect.
The power conversion and supply circuit comprises a voltage control circuit, an oscillation circuit, a transformer, a power output circuit and a power conversion state monitoring circuit. The voltage control circuit changes the voltage of two power supply control signals of the system into a proper voltage value after one of the two power supply control signals is selected, so that the normal and reliable work of the rear-stage oscillation circuit is ensured. The oscillating circuit converts an input direct-current voltage signal into an alternating-current oscillating signal with specific frequency, the transformer is adopted to isolate the front stage and the rear stage and respectively transmit the signals, the signals are converted into direct-current driving voltage through filtering and rectification, and the power output circuit of the power supply battery and the power conversion state monitoring circuit are controlled to be conducted, so that the functions of switching control of system ground power supply and battery power supply, power conversion state monitoring and the like are realized.
The power output circuit has the functions of combining and outputting system ground power supply and battery power supply, and two output paths share one output end; meanwhile, the N-type VDMOS with small on-resistance is selected, so that the power consumption can be effectively reduced, and the output end is connected with the source electrode of the VDMOS. When the control signal VEE1And a control signal VEE2When all are not sent out, only the ground power supply V is usedCC1Supplying power through an output end; when one of the control signals is sent out, the battery VCC2The path is conducted, power is supplied through the output end, and the two paths are combined for output; when the ground power supply VCC1After shut down, the battery VCC2The path is still conducted and works normally; the power output circuit adopts N-type VDMOS, the on-resistance is small, each VDMOS is connected with a grid resistor with larger resistance value by the mode that two VDMOS are connected in parallel and two groups are connected in series, thus the circuit can still work normally no matter any one VDMOS is damaged, and the requirement of redundancy design is met.
Claims (7)
1. A power conversion and supply circuit is characterized by comprising a voltage control circuit, an oscillating circuit, a transformer, a rectifying and filtering circuit, a power output circuit and a power conversion state monitoring circuit; the output end of the control circuit is connected with the input end of the oscillating circuit, and the output end of the transformer is connected with the power output circuit; the voltage control circuit is used for adjusting the voltage of the power supply control signal;
the oscillating circuit is used for converting a direct-current voltage signal into an alternating-current oscillating signal, a primary winding of the transformer adopts a single winding T1, and a secondary winding adopts double windings and comprises a secondary winding T2 and a secondary winding T3; the secondary winding T2 is connected into the power output circuit and used for driving a VDMOS tube, so that the on-off of the battery output circuit is controlled; the oscillating circuit outputs a signal through a primary winding T1;
the power conversion state monitoring circuit comprises a triode Q7 and a monitoring end, a secondary winding T3 is connected into the power conversion state monitoring circuit and used for driving a power conversion triode Q7, and two ends of the secondary winding T3 are respectively connected with a base electrode and an emitting electrode of a triode Q7; an emitting electrode of the triode Q7 is connected with a monitoring end, and a collector electrode of the triode Q7 is connected with the positive electrode of the input end of the power output circuit; the rectification filter circuit is used for converting the alternating current oscillation signal into a direct current signal and is connected with the power output circuit;
the power output circuit comprises four VDMOS tubes, a voltage regulator tube D6 and four grid resistors; each VDMOS tube is respectively connected with a grid resistor, one end of each grid resistor is connected with the G pole of the VDMOS tube, and the other end of each grid resistor is connected with the negative pole of a voltage regulator tube D6; the four VDMOS tubes are connected in parallel two by two and then are connected in series; one end of the series group is connected with a ground plane VCC1, the output end of the series group is connected with the anode of a voltage regulator tube D6, and the other end of the series group is connected with a battery VCC 2;
the power supply control signal in the control circuit comprises a control signal VEE1And a control signal VEE2Power supply control signal VEE1The control signal V is input to the anode of the diode D1EE2The anode of the input diode D2; the diode D1 and the diode D2 are connected in parallel and then connected with the cathode of a voltage regulator tube D5, the anode of the voltage regulator tube D5 is connected with a resistor R1, and the other end of the resistor R1 is connected with the input of an oscillation circuitA terminal;
the rectifying and filtering circuit comprises a diode D3, a diode D4, a capacitor C4, a resistor R5, a resistor R6 and a triode Q2, the diode D3 is connected with the diode D4 in series, the negative electrode of the diode D4 is connected with the emitter of a triode Q2, the collector of the triode Q2 is connected with one end of a resistor R6, the capacitor C4 is connected with the resistor R5 in parallel, one end of the resistor R5 is connected with the base of the triode Q2 and the positive electrode of the diode D4, and the other end of the resistor R6 is connected with the other end of the resistor R5; the anode of the diode D3 is connected with one end of the secondary winding T2, and the collector of the triode Q2 is connected with the other end of the secondary winding T2;
the power conversion state monitoring circuit further comprises a diode D9, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C5 and a voltage regulator tube D8, wherein one end of a secondary winding T3 is connected with one end of the capacitor C5, the other end of the secondary winding T3 is connected with the anode of a diode D9, the cathode of the diode D9 is connected with the other end of the capacitor C5 and one end of the resistor R11, the other end of the resistor R11 is connected with the base of a triode Q7, and the base of the triode Q7 is further connected with the cathode of the voltage regulator tube D8;
one end of the resistor R13 and the resistor R14 which are connected in parallel is connected with the anode of the voltage regulator tube D6, and the other end of the resistor R13 and the resistor R14 which are connected in parallel is connected with the collector of the triode Q7; an emitter electrode of the triode Q7 is connected with the resistor R15 and a monitoring end, one end of the resistor R15 is connected with the anode of the voltage-regulator tube D8, and the voltage-regulator tube D8 is connected with the resistor R12 in parallel; the power output circuit comprises a gate resistor R7, a gate resistor R8, a gate resistor R9, a gate resistor R10, a VDMOS tube Q3, a VDMOS tube Q4, a VDMOS tube Q5 and a VDMOS tube Q6; the VDMOS transistor Q3 is connected with the gate resistor R7, the VDMOS transistor Q4 is connected with the gate resistor R8, the VDMOS transistor Q5 is connected with the gate resistor R9, and the VDMOS transistor Q6 is connected with the gate resistor R10; the S poles of the VDMOS tube Q4 and the VDMOS tube Q6 are connected with the ground VCC1, the anode of the voltage regulator tube D6 and the output end, and the D poles of the VDMOS tube Q3 and the VDMOS tube Q5 are connected with the battery VCC 2; the VDMOS tubes in the power output circuit are all N-type VDMOS tubes.
2. The power conversion and supply circuit of claim 1, wherein the oscillation circuit comprises a bias resistor R2, a bias resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, an NPN-type triode Q1 and an inductor L, and one end of the capacitor C1 and the resistor R2 which are connected in parallel is connected with a base electrode of the NPN-type triode Q1;
two ends of the resistor R2 and the resistor R4 are connected in series and then connected in parallel with the capacitor C2, and two ends of the capacitor C2 are connected with the base electrode and the emitter electrode of the NPN type triode Q1;
an emitter and a collector of the NPN type triode Q1 are respectively connected with two ends of a capacitor C3, the other end of a parallel circuit of R2 and C1 is connected with one end of an inductor L1, and the other end of an inductor L1 is connected with a collector of an NPN type triode Q1.
3. The power conversion and supply circuit of claim 1, wherein the rectifier filter circuit comprises a diode D3, a diode D4, a capacitor C4, a resistor R5, a resistor R6 and a transistor Q2, the diode D3 is connected in series with the diode D4, the cathode of the diode D4 is connected with the emitter of the transistor Q2, the collector of the transistor Q2 is connected with one end of a resistor R6, the capacitor C4 is connected in parallel with the resistor R5, one end of the resistor R5 is connected with the base of the transistor Q2 and the anode of the diode D4, and the other end of the resistor R6 is connected with the other end of the resistor R5; the anode of the diode D3 is connected to one end of the secondary winding T2, and the collector of the transistor Q2 is connected to the other end of the secondary winding T2.
4. The power conversion and supply circuit according to claim 1, wherein the gate resistor has a resistance of 1K to 2K.
5. A power conversion and supply circuit according to claims 1-4, characterized in that an integrated circuit structure based on an aluminum substrate is adopted, and all components are surface-mounted solderable devices arranged on the upper layer of the substrate.
6. The method according to claim 5, wherein the control signal voltage is converted into a voltage value suitable for input to the oscillation circuit by the voltage control circuit and output to the oscillation circuit;
the oscillating circuit converts an input direct-current voltage signal into an alternating-current oscillating signal with specific frequency, a transformer is adopted to isolate a front stage and a rear stage and respectively transmit the signals, the signals are converted into direct-current driving voltage through a filter rectifying circuit and are output to a power output circuit, and the power output circuit of the power supply battery is controlled to realize the switching between the ground power supply and the battery power supply of the system.
7. The method of claim 6, wherein the control signal V is a control signalEE1And a control signal VEE2When all are not sent out, only the ground power supply V is usedCC1Supplying power through an output end; when one of the control signals is sent out, the battery VCC2The path is conducted, power is supplied through the output end, and the two paths are combined for output; when the ground power supply VCC1After shut down, the battery VCC2The path is still conducted and works normally; the power output circuit has system ground power supply and battery power supply combined output, and two output paths share one output end.
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| CN113973429B (en) * | 2021-10-26 | 2023-05-30 | 西安微电子技术研究所 | Structure and method for isolating grid driver with double-layer structure |
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| CN2678252Y (en) * | 2004-01-14 | 2005-02-09 | 曹骥 | MOS DC solid-state relay |
| JP4718237B2 (en) * | 2005-05-16 | 2011-07-06 | フォスター電機株式会社 | Switching power supply |
| CN102386751A (en) * | 2011-11-30 | 2012-03-21 | 江苏大全凯帆电器股份有限公司 | Driving system for double-pipe parallel IGBTs for wind power generation equipment |
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