CN1193483C - Method and device for generating driving power supply - Google Patents
Method and device for generating driving power supply Download PDFInfo
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- CN1193483C CN1193483C CNB021056951A CN02105695A CN1193483C CN 1193483 C CN1193483 C CN 1193483C CN B021056951 A CNB021056951 A CN B021056951A CN 02105695 A CN02105695 A CN 02105695A CN 1193483 C CN1193483 C CN 1193483C
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Abstract
The present invention relates to a method and a device therefor for generating a driving power supply for a system used for regulating electric variation or magnetic variation. The present invention makes the voltage of an input single power supply conversed into positive and negative double-voltage output with stable positive voltage. The method comprises the following steps: inputted single voltage is used for outputting reference voltage required by given stable positive voltage; proportional sampling is carried out to output voltage; the deviation of the reference voltage and the output sampling voltage is amplified; the amplified deviation is used for power output regulation; the change of the output positive voltage is provided with reverse feedback so as to make the output sampling voltage and the reference voltage tend towards equality; the positive voltage after regulation is used as positive voltage output; a result that the inputted single voltage subtracts the positive voltage after regulation is used as negative voltage output. A voltage output unit is also connected with an under-voltage detection circuit for under voltage monitoring for the value of the output negative voltage so as to realize the protective control of a driving circuit. The present invention has the advantages of high stability, strong performance and low cost, and is suitable for the power supply driving of driving devices of various insulated gate transistors or field effect tubes.
Description
Technical field
The present invention relates to regulate the system of electric variable or magnetic variable, relate in particular to a kind of method and apparatus that produces driving power.
Background technology
Be used for the driving design of multichannel gated transistor or field effect transistor, as frequency converter and three-phase inverter etc., in order to simplify circuit and to reduce cost, usually adopt single power supply, as exporting the DC-DC power supply by multichannel, and the driving of the high-performance of gated transistor or field effect transistor needs duplicate supply work, the grid voltage that is gated transistor or field effect transistor when opening is+15V, during shutoff be-5V--15V, therefore need this single supply be converted to negative and positive dual power with a circuit, the following is several schemes commonly used:
As Fig. 1, Fig. 2, three prior art schemes shown in Figure 3 shortcoming is arranged respectively.Can not guarantee the stability of positive-negative power simultaneously to the scheme of Fig. 1, as input power source voltage decline 2V, the voltage of then the exporting positive supply 2V that also descended, the conduction loss of gated transistor increases, otherwise as input power source voltage rising 2V, the voltage of then the exporting positive supply 2V that also raise, the surge current tolerance level of gated transistor descends, and the gated transistor functional reliability reduces.In Fig. 2 and Fig. 3, owing to need input and output pressure reduction, and the general minimum differntial pressure of this pressure reduction requires usually greater than 3V, as seen its supply voltage utilance is not high, and in order to guarantee that this pressure reduction is not less than the minimum differntial pressure requirement and the size of special requirement raising input supply voltage in all cases, pressure reduction is chosen the higher heat dissipation problem that also needs to consider them when being used for more powerful drive circuit, circuit cost is high, and the negative supply power that provides of Fig. 1, Fig. 2, three schemes of Fig. 3 is less should not be used for more powerful gated transistor and drive.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art and defective, the method and apparatus of the strong generation driving power of a kind of stable height and performance is provided.
The method of the generation driving power among the present invention, the univoltage of input is converted to positive and negative pair of voltage output with stable positive voltage, it may further comprise the steps: receive the single-power voltage input, generation is used to export the required reference voltage of stable positive voltage of setting after utilizing the univoltage process voltage stabilizing conversion of importing, the output positive voltage is carried out proportional sampling, obtain the output sampled voltage; The deviation of described reference voltage and described output sampled voltage is amplified, and the deviation of amplifying is used for power output adjusts, to providing negative feedback, and make the output sampled voltage be tending towards equating with reference voltage owing to load or input voltage change the output positive voltage variation that causes; Adjusted positive voltage is exported as positive voltage, and will be imported univoltage and deduct the result who adjusts the back positive voltage and export as negative voltage.
The method of this generation driving power is further comprising the steps of: the size to the output negative voltage is carried out under-voltage monitoring, the under-voltage signal of detected negative voltage is inserted corresponding insulation gate transistor drive circuit go to realize blockade to gated transistor.
The device of the generation driving power of the above-mentioned generation driving power of this application method comprises: a voltage input unit, and it comprises voltage input anode and input negative terminal, is used to receive the single-power voltage input; One reference voltage generation unit, it comprises one first voltage-stabiliser tube and one first resistance, is used to produce the required reference voltage of stable positive voltage that output is set; One voltage sample unit, it comprises first sample resistance and second sample resistance, is used for the output positive voltage is carried out proportional sampling, obtains the output sampled voltage; One differential motion amplifying unit, it comprises a long-tail resistance, an input triode and an output triode, is used for described reference voltage and output sampled voltage deviation are amplified; One power output adjustment unit, it comprises the power output triode, this power output adjustment unit is subjected to the driving of described differential motion amplifying unit, for providing negative feedback because load or input voltage change the output positive voltage variation that causes, and makes and exports sampled voltage and be tending towards equating with reference voltage; One voltage output unit, it comprises voltage output plus terminal, negative terminal and ground connection output, is used for output through the adjusted positive voltage of power output adjustment unit, and input voltage is deducted the described result who adjusts the back positive voltage exports as negative voltage.
In the described voltage input unit in input anode and the voltage output unit output plus terminal communicate, exporting negative terminal in the voltage input unit in input negative terminal and the voltage output unit communicates, this long-tail resistance one end is connected in voltage input anode, the other end is connected in the emitter of input triode and output triode, the base stage of this input triode is connected between first voltage-stabiliser tube and first resistance, and the base stage of this output triode is connected between first sample resistance and second sample resistance.
Beneficial effect of the present invention is: in the present invention, sampled voltage through proportional sampling is comparatively stable, accurately, adjust by power output again and offset because load or input voltage change the output positive voltage variation that causes, such design is regulated output voltage well, and can be used for more powerful gated transistor or field effect transistor drives to power output adjustment unit corresponding configuration, therefore, the present invention's stability height and performance are strong, and, owing to positive voltage variation is introduced negative feedback, makes the present invention not high to the stability requirement of input power source voltage; Constitute the reference voltage generation unit by voltage-stabiliser tube DZ1 that is serially connected with voltage input unit two ends and resistance R 1, power output triode Q3 forms power output adjustment unit and the output voltage sampling unit is sample resistance R4 and the sample resistance R5 that is connected in the voltage output unit positive voltage output end, this set makes circuit of the present invention simple, number of elements is few, with low cost, from this design of the present invention as can be seen, the supply voltage utilance has reached 100% on principle, the big I of output positive voltage is passed through to adjust the ratio flexible that output voltage is sampled according to the requirement of drive circuit, because various drive circuits multi-form or the different manufacturers design often need different supply voltages, the positive voltage of general driving power is between+15V-+18V, so just can be provided with flexibly as required, strengthen adaptability of the present invention and practicality; Voltage-stabiliser tube DZ1 two ends shunt capacitance, the high-frequency noise that the energy filtering is brought by voltage-stabiliser tube DZ1 and input power supply, and be connected with electric capacity between the base stage of power output triode Q3 and the collector electrode, this electric capacity is phase compensation electric capacity, prevent power output triode Q3 self-oscillation, further improved job stability of the present invention; Voltage output unit connects a undervoltage detection circuit; this undervoltage detection circuit carries out under-voltage monitoring to the size of output negative voltage; the under-voltage signal of detected negative voltage is inserted corresponding insulation gate transistor or field effect transistor drive circuit go to realize blockade gated transistor or field effect transistor; so in use can carry out real-time under-voltage protection control to gated transistor or field effect transistor, improve use completeness of the present invention and practicality by the size of monitoring negative voltage.
In a word, the present invention stability is high, performance is strong, circuit is simple, with low cost, is suitable for the power drives of various gated transistors or field effect transistor drive unit.
Description of drawings
Fig. 1 is one of an existing power supply drive circuit schematic diagram;
Fig. 2 is two schematic diagrames of existing power supply drive circuit;
Fig. 3 is three schematic diagrames of existing power supply drive circuit;
Fig. 4 is a principle of the invention schematic diagram;
Fig. 5 is a circuit diagram of the present invention;
Fig. 6 is the undervoltage detection circuit schematic diagram;
Fig. 7 is an application scheme schematic diagram of the present invention.
Embodiment
With embodiment the present invention is described in further detail with reference to the accompanying drawings below:
According to Fig. 4, Fig. 5 and Fig. 6, the device of generation driving power of the present invention comprises voltage input unit 1, be used to receive the single-power voltage input, reference voltage generation unit 2 is used to produce the required reference voltage of stable positive voltage that output is set, output voltage sampling unit 5 is used for the output positive voltage is carried out proportional sampling, obtain the output sampled voltage, differential motion amplifying unit 3 is used for reference voltage and output sampled voltage deviation are amplified, the driving that power output adjustment unit 4 is subjected to differential motion amplifying unit 3 is for because the output positive voltage variation that load or input voltage variation cause provides negative feedback, and make the output sampled voltage be tending towards equating with reference voltage, voltage output unit 6 is used for output through power output adjustment unit 4 adjusted positive voltages, and input voltage is deducted the described result who adjusts the back positive voltage export as negative voltage, in the voltage input unit 1 in input anode Vin+ and the voltage output unit 6 output plus terminal Vo+ communicate, exporting negative terminal Vo-in the voltage input unit 1 in input negative terminal Vin-and the voltage output unit 6 communicates, wherein be connected with differential motion amplifying unit 3 and a triode Q1 who is connected in two positive-negative-positives in the differential motion amplifying unit 3 between input anode Vin+ and the input negative terminal Vin-in the voltage input unit 1, NPN type power output triode Q3 between the collector electrode of Q2, be connected the voltage-stabiliser tube DZ1 in the reference voltage generation unit 2 between the outer end of the long-tail resistance R 3 in the input triode Q1 base stage in the differential motion amplifying unit 3 and the differential motion amplifying unit 3, input triode Q1 base stage connects voltage-stabiliser tube DZ1 positive pole, be connected sample resistance R4 and sample resistance R5 respectively between output plus terminal Vo+ in output triode Q2 base stage in the differential motion amplifying unit 3 and the voltage output unit 6 and the ground connection output end vo, and the ground connection output end vo links to each other with triode Q3 collector electrode, be connected resistance R 2 between triode Q3 base stage and the emitter, voltage-stabiliser tube DZ1 two ends are shunt capacitance C1 also, is connected with capacitor C 2 between the base stage of triode Q3 and the collector electrode; Voltage output unit 6 also is connected with a undervoltage detection circuit 7, this undervoltage detection circuit 7 connects output plus terminal Vo+ and the output negative terminal Vo-in the voltage output unit 6, suitable connecting resistance R12 and resistance R 22 between output plus terminal Vo+ and the output negative terminal Vo-, the junction of resistance R 12 and resistance R 22 links to each other with the negative pole of voltage-stabiliser tube DZ22, the positive pole of voltage-stabiliser tube DZ22 links to each other with triode Q12 base stage, triode Q12 emitter links to each other with the ground connection output end vo, be connected resistance R 32 between the emitter of triode Q12 and the base stage, be connected resistance R 42 between the collector electrode of triode Q12 and the output plus terminal Vo+, the collector electrode of triode Q12 links to each other with the base stage of triode Q22, and the emitter of triode Q22 links to each other with the emitter of triode Q12.
Comprise the input filter unit in voltage input unit 1, the input filter unit that is made of capacitor C 3 provides input filtering and current response fast; Comprise the output filter unit in voltage output unit 6, the output filter unit that is made of capacitor C 4, C5 provides the filtering of output positive-negative power and provides current response fast for the sudden change of load current.
With reference to the accompanying drawings as seen, the present invention is split into adjustable stable positive voltage and the negative voltage of and input power supply common decision big or small by positive voltage with the single supply of input.
Basic functional principle of the present invention is: 5 pairs of output of output voltage sampling unit positive voltage carries out proportional sampling, obtain the output sampled voltage, differential motion amplifying unit 3 is amplified reference voltage and output sampled voltage deviation, the driving that power output adjustment unit 4 is subjected to differential motion amplifying unit 3 is for because the output positive voltage variation that load or input voltage variation cause provides negative feedback, and make the output sampled voltage be tending towards equating with reference voltage, voltage output unit 6 outputs are through power output adjustment unit 4 adjusted positive voltages, and input voltage is deducted the described result who adjusts the back positive voltage export as negative voltage, now establish voltage-stabiliser tube DZ1 5.1V be provided reference voltage, then can obtain exporting the value of positive voltage:
Vo+＝(R5/R4+1)*5.1
Simultaneously, can obtain exporting the value of negative voltage: Vo-=Vin-Vo+, wherein Vin is the value of input voltage.
It is as follows that the present invention adjusts principle of stabilized voltage for load: when electric power outputting current reduces, the rising of output positive voltage-→ resistance R 4 two ends pressure reduction increases, promptly than reference voltage height-→ triode Q2 collector current increases-→ triode Q1 collector current reduces, triode Q3 base current reduces-→ triode Q3 collector current reduces, triode Q3 equivalent resistance increases, triode Q3 collector emitter voltage increases ,-→ decline of output positive voltage.
It is as follows that the present invention adjusts principle of stabilized voltage for input: when input voltage raise-→ the output positive voltage raises-→ resistance R 4 two ends pressure reduction increase, promptly than reference voltage height-→ triode Q2 collector current increases-→ triode Q1 collector current reduces, triode Q3 base current reduces-→ triode Q3 collector current reduces, triode Q3 equivalent resistance increases, the increase of triode Q3 collector emitter voltage-→ decline of output positive voltage.
Power output adjustment unit 4 is offset because load or input voltage change the output positive voltage variation that causes by changing its equivalent internal resistance of adjustment, realizes the power adjustment control of big electric current.
As shown in Figure 7, for the present invention is applied to the scheme of a utility power, the gated transistor driving power I among the figure adopts design of the present invention to gated transistor driving power VI.
Voltage output unit 6 is connected with a undervoltage detection circuit 7; this undervoltage detection circuit 7 detects the size of negative voltage; detected negative voltage signal is inserted corresponding insulation gate transistor drive circuit to be gone to realize blockade to gated transistor to realize the under-voltage protection of output positive voltage, output negative voltage simultaneously.
According to shown in Figure 6, during line under-voltage, as exporting the value that negative supply is lower than setting, that is:
(DZ22+0.7) * (R1+R2)/R2-Vo+, wherein DZ22 is the voltage stabilizing value, triode Q12 collector electrode is high-impedance state, triode Q12 conducting during the power supply operate as normal can be received the collector signal of triode Q32 corresponding insulation gate transistor drive circuit and be gone to realize blockade to gated transistor.
Claims (10)
1. a method that produces driving power is converted to positive and negative pair of voltage output with stable positive voltage with the input single-power voltage, it is characterized in that, may further comprise the steps:
The input of reception single-power voltage;
Utilize the univoltage of input to be used to export the required reference voltage of stable positive voltage of setting through voltage stabilizing conversion generation;
The output positive voltage is carried out proportional sampling, obtain the output sampled voltage;
The deviation of described reference voltage and described output sampled voltage is amplified, and the deviation of amplifying is used for power output adjusts, to providing negative feedback, and make the output sampled voltage be tending towards equating with reference voltage owing to load or input voltage change the output positive voltage variation that causes;
Adjusted positive voltage is exported as positive voltage, and will be imported univoltage and deduct the result who adjusts the back positive voltage and export as negative voltage.
2. the method for generation driving power according to claim 1, it is characterized in that, further comprising the steps of: the size to the output negative voltage is carried out under-voltage monitoring, the under-voltage signal of detected negative voltage is inserted corresponding insulation gate transistor drive circuit go to realize blockade to gated transistor.
3. an application rights requires the device of the generation driving power of 1 described generation driving power method, it is characterized in that it comprises:
One voltage input unit (1), it comprises voltage input anode (Vin+) and input negative terminal (Vin-), is used to receive the single-power voltage input;
One reference voltage generation unit (2), it comprises one first voltage-stabiliser tube (DZ1) and one first resistance (R1), is used to produce the required reference voltage of stable positive voltage that output is set;
One voltage sample unit (5), it comprises first sample resistance (R4) and second sample resistance (R5), is used for the output positive voltage is carried out proportional sampling, obtains the output sampled voltage;
One differential motion amplifying unit (3), it comprises a long-tail resistance (R3), an input triode (Q1) and an output triode (Q2), is used for described reference voltage and output sampled voltage deviation are amplified;
One power output adjustment unit (4), it comprises power output triode (Q3), this power output adjustment unit (4) is subjected to the driving of described differential motion amplifying unit (3), for providing negative feedback, and make the output sampled voltage be tending towards equating with reference voltage owing to load or input voltage change the output positive voltage variation that causes;
One voltage output unit (6), it comprises voltage output plus terminal (Vo+), negative terminal (Vo-) and ground connection output (Vo), be used for output through the adjusted positive voltage of power output adjustment unit (4), and input voltage is deducted the described result who adjusts the back positive voltage export as negative voltage.
4. the device of generation driving power according to claim 3 is characterized in that described first voltage-stabiliser tube (DZ1) and first resistance (R1) voltage input anode (Vin+) and the input negative terminal (Vin-) for being serially connected with voltage input unit (1).
5. the device of generation driving power according to claim 4, it is characterized in that the base stage of described power output triode (Q3) is connected in the collector electrode of input triode (Q1), its collector electrode is connected in the ground connection output (Vo) of voltage output unit (6), and its emitter is connected in voltage input negative terminal (Vin-).
6. the device of generation driving power according to claim 5 is characterized in that: described first sample resistance (R4) and second sample resistance (R5) are for being serially connected with between voltage output unit (6) voltage output plus terminal (Vo+) and the ground connection output (Vo).
7. the device of generation driving power according to claim 6, it is characterized in that: the middle output plus terminal (Vo+) of input anode (Vin+) and voltage output unit (6) communicates in the voltage input unit (1), exporting negative terminal (Vo-) in the voltage input unit (1) in input negative terminal (Vin-) and the voltage output unit (6) communicates, this long-tail resistance (R3) end is connected in voltage input anode (Vin+), the other end is connected in the emitter of input triode (Q1) and output triode (Q2), the base stage of this input triode (Q1) is connected between first voltage-stabiliser tube (DZ1) and first resistance (R1), and the base stage of this output triode (Q2) is connected between first sample resistance (R4) and second sample resistance (R5).
8. according to the device of claim 4 or 7 described generation driving powers, it is characterized in that described voltage-stabiliser tube (DZ1) two ends first electric capacity also in parallel (C1).
9. according to the device of claim 5 or 7 described generation driving powers, it is characterized in that being connected with second electric capacity (C2) between the base stage of described power output triode (Q3) and the collector electrode.
10. the device of generation driving power according to claim 7, it is characterized in that: described voltage output unit (6) also is connected with a undervoltage detection circuit (7), this undervoltage detection circuit (7) connects output plus terminal (Vo+) and the output negative terminal (Vo-) in the voltage output unit (6), suitable second resistance (R12) and the 3rd resistance (R22) of connecing between output plus terminal (Vo+) and the output negative terminal (Vo-), the junction of second resistance (R12) and the 3rd resistance (R22) links to each other with the negative pole of second voltage-stabiliser tube (DZ22), the positive pole of second voltage-stabiliser tube (DZ22) links to each other with first triode (Q12) base stage, first triode (Q12) emitter links to each other with ground connection output (Vo), be connected the 4th resistance (R32) between the emitter of first triode (Q12) and the base stage, be connected the 5th resistance (R42) between the collector electrode of first triode (Q12) and the output plus terminal (Vo+), the collector electrode of first triode (Q12) links to each other with the base stage of second triode (Q22), and the emitter of second triode (Q22) links to each other with the emitter of first triode (Q12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021056951A CN1193483C (en) | 2002-04-18 | 2002-04-18 | Method and device for generating driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021056951A CN1193483C (en) | 2002-04-18 | 2002-04-18 | Method and device for generating driving power supply |
Publications (2)
| Publication Number | Publication Date |
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| CN1402418A CN1402418A (en) | 2003-03-12 |
| CN1193483C true CN1193483C (en) | 2005-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021056951A Expired - Fee Related CN1193483C (en) | 2002-04-18 | 2002-04-18 | Method and device for generating driving power supply |
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| CN (1) | CN1193483C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101409503B (en) * | 2007-10-10 | 2011-04-20 | 英业达股份有限公司 | Feedback comparing device and DC-to-DC voltage converter |
| CN101763129B (en) * | 2009-12-09 | 2012-08-29 | 海洋王照明科技股份有限公司 | Voltage regulator circuit base on LDO integrated circuit |
| CN102289237B (en) * | 2011-01-27 | 2013-05-08 | 电子科技大学 | Dual-mode on-chip power supply circuit |
| CN104660018B (en) * | 2015-02-13 | 2017-06-16 | 深圳市禾望电气股份有限公司 | Semiconductor devices driving power supply circuit |
| CN107844156A (en) * | 2017-10-26 | 2018-03-27 | 广州金升阳科技有限公司 | Bleeder circuit and its application |
| CN110389612B (en) * | 2018-04-17 | 2020-12-22 | 立锜科技股份有限公司 | Positive and negative voltage driving circuit and control method thereof |
| CN109039221B (en) * | 2018-08-29 | 2021-12-10 | 阳光电源股份有限公司 | Active short circuit and motor controller |
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2002
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