CN104410281A - Beam-excited pulse width modulation power supply based on logic protection emitter-coupled mode - Google Patents
Beam-excited pulse width modulation power supply based on logic protection emitter-coupled mode Download PDFInfo
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- CN104410281A CN104410281A CN201410713497.1A CN201410713497A CN104410281A CN 104410281 A CN104410281 A CN 104410281A CN 201410713497 A CN201410713497 A CN 201410713497A CN 104410281 A CN104410281 A CN 104410281A
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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
- H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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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
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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Abstract
The invention discloses a beam-excited pulse width modulation power supply based on a logic protection emitter-coupled mode. The beam-excited pulse width modulation power supply mainly includes a diode rectifier U, a power amplifier P1, a transformer T, a switching filtering circuit connected in series between the diode rectifier U and the power amplifier P1, a power output circuit connected with a secondary coil L2 of the transformer T, a transformation feedback circuit connected with a secondary coil L3 of the transformer T, a switching control circuit connected with the transformation feedback circuit, and the like. The beam-excited pulse width modulation power supply is characterized in that a logic protection emitter-coupled amplifying circuit is further connected in series between a slope compensator W and a current comparator I2. The beam-excited pulse width modulation power supply provided by the invention has the advantages that the slope compensator, a voltage comparator and the current comparator are innovatively utilized in a power circuit, so that the radio-frequency interference from the circuit and an external device is effectively reduced, and the circuit structure is greatly simplified to achieve much lower manufacture and maintenance costs.
Description
Technical field
The present invention relates to a kind of switching power supply, specifically refer to the pulse width modulated power supply of beam excitation of a kind of logic-based protection emitter-base bandgap grading manifold type.
Background technology
Along with continuous progress scientific and technological at present, electronic product also brings great convenience to people are in life while function from strength to strength.Voltage stabilizing circuit is just runed and gives birth to, and traditional series connection linear regulator type voltage stabilizing circuit has the features such as stability is high, output voltage is adjustable, ripple coefficient is little, circuit is simple.But the Correctional tube of these series connection linear regulator type voltage stabilizing circuits is always operating at magnifying state, and have electric current to flow through, therefore the power consumption of its pipe is comparatively large, the efficiency of circuit is not high, generally can only reach about 30% ~ 50% always.In order to overcome above-mentioned defect, people just have developed switching mode voltage stabilizing circuit.
In switching mode voltage stabilizing circuit, surge pipe is operated on off state, pipe alternation saturated with cut-off two states in.When pipe saturation conduction, though it is large to flow through pipe current, but tube voltage drop is very little; When pipe ends, tube voltage drop is large, but the electric current flow through is close to zero.Therefore, under power output the same terms, the efficiency of switching mode voltage stabilizer coin series regulator is high, generally can reach about 80% ~ 90%.But it is comparatively large that the switching mode voltage stabilizer that current people adopt but exists ripple coefficient, when Correctional tube constantly switches between saturated and cut-off state, radio frequency interference can be produced to circuit, circuit more complicated and cost is higher.
Summary of the invention
The object of the invention is to the defect that ripple coefficient is comparatively large, radio frequency interference is serious, circuit is complicated and efficiency is not high overcoming the existence of current switching mode voltage stabilizer, provide a kind of logic-based to protect the pulse width modulated power supply of beam excitation of emitter-base bandgap grading manifold type.
Object of the present invention is achieved through the following technical solutions: a kind of pulse width modulated power supply of beam excitation of logic-based protection emitter-base bandgap grading manifold type, primarily of diode rectifier U, power amplifier P1, transformer T, be serially connected in the switched filter circuit between diode rectifier U and power amplifier P1, the power output circuit be connected with the secondary coil L2 of transformer T, the transformation feedback circuit be connected with the secondary coil L3 of transformer T, the ON-OFF control circuit be connected with transformation feedback circuit, the oscillator be connected with ON-OFF control circuit, the current comparator I1 be connected with ON-OFF control circuit, the current comparator I2 be connected with ON-OFF control circuit, the slope equalizer W be connected with current comparator I1 with oscillator, respectively with power amplifier P1, the beam excitation formula logic amplifying circuit that current comparator I1 and diode rectifier U is connected, and output is connected with the tap on the primary coil L1 of transformer T, and the sliding damper that input is connected with the output of power amplifier P1 forms.
Meanwhile, between slope equalizer W and current comparator I2, be also serially connected with virtual protection emitter-base bandgap grading manifold type amplifying circuit, described virtual protection emitter-base bandgap grading manifold type amplifying circuit is primarily of triode Q2, triode Q3, power amplifier P4, power amplifier P5, be serially connected in the resistance R10 between the end of oppisite phase of power amplifier P4 and output, be serially connected in the polar capacitor C11 between the in-phase end of power amplifier P5 and output, be serially connected in the resistance R9 between the in-phase end of power amplifier P4 and the collector electrode of triode Q2, be serially connected in the resistance R11 between the collector electrode of triode Q2 and the base stage of triode Q3, the electric capacity C10 be in parallel with resistance R11, negative pole is connected with the in-phase end of power amplifier P4, the polar capacitor C9 that positive pole is connected with the emitter of triode Q2 after resistance R12, be serially connected in the resistance R13 between the base stage of triode Q3 and the positive pole of polar capacitor C9, positive pole is connected with the emitter of triode Q3, negative pole is in turn through electric capacity C12 that voltage stabilizing didoe D6 is connected with the output of power amplifier P4 after resistance R14, P pole is connected with the output of power amplifier P5, the diode D7 that N pole is connected with the tie point of resistance R14 with voltage stabilizing didoe D6 after resistance R15 through resistance R16, and P pole is connected with the negative pole of electric capacity C12, the voltage stabilizing didoe D8 that N pole is connected with the tie point of resistance R16 with diode D7 forms, the base stage of described triode Q2 is connected with the positive pole of polar capacitor C9, and its emitter is connected with the emitter of triode Q3, and its collector electrode is connected with the end of oppisite phase of power amplifier P4, the collector electrode of triode Q3 is connected with the end of oppisite phase of power amplifier P5, and the in-phase end of power amplifier P5 is connected with the output of power amplifier P4, the positive pole of described polar capacitor C9 is then connected with the negative input of current comparator I1 after slope equalizer W, and resistance R16 is then connected with the output of current comparator I2 with the tie point of resistance R15.
Described beam excitation formula logic amplifying circuit is primarily of power amplifier P3, NAND gate IC1, NAND gate IC2, NAND gate IC3, negative pole is connected with the in-phase end of power amplifier P3, the polar capacitor C6 of positive pole ground connection after optical diode D4, one end is connected with the positive pole of polar capacitor C6, the resistance R4 of other end ground connection after diode D5, positive pole is connected with the tie point of diode D5 with resistance R4, the polar capacitor C7 of minus earth, one end is connected with the negative input of NAND gate IC1, the resistance R5 that the other end is connected with the in-phase end of power amplifier P3, be serially connected in the resistance R6 between the end of oppisite phase of power amplifier P3 and output, one end is connected with the output of NAND gate IC1, the resistance R7 that the other end is connected with the negative input of NAND gate IC3, positive pole is connected with the output of NAND gate IC2, the electric capacity C8 that negative pole is connected with the negative input of NAND gate IC3, and one end is connected with the positive pole of polar capacitor C7, the resistance R8 that the other end is connected with the negative input of NAND gate IC2 forms, the electrode input end of described NAND gate IC1 is connected with the end of oppisite phase of power amplifier P3, and its output is connected with the electrode input end of NAND gate IC2, and the electrode input end of NAND gate IC3 is connected with the output of power amplifier P3, the output of described NAND gate IC3 is then connected with current comparator I1 with power amplifier P1 respectively, and the in-phase end of power amplifier P3 is connected with the cathode output end of diode rectifier U.
Described switched filter circuit is by triode Q1, and electric capacity C1, electric capacity C2, resistance R1, resistance R2 and diode D1 form; The base stage of described triode Q1 forms loop with its collector electrode in turn after resistance R2, diode D1 and resistance R1, and electric capacity C1 and resistance R1 is in parallel, and electric capacity C2 and resistance R2 is in parallel; The collector electrode of triode Q1 is connected with the cathode output end of diode rectifier U, its grounded emitter; The cathode output end of diode rectifier U is then directly connected with the end of oppisite phase of power amplifier P1, and resistance R2 is then connected with the in-phase end of power amplifier P1 with the tie point of diode D1; The primary coil L1 of transformer T is then in parallel with diode D1.
The diode D2 that described power output circuit is connected with the Same Name of Ends of secondary coil L2 by P pole, N pole is connected with the non-same polarity of secondary coil L2 after electric capacity C3, and the inductance L 4 that one end is connected with the N pole of diode D2, the other end is connected with the non-same polarity of secondary coil L2 after electric capacity C4 forms.
Described transformation feedback circuit is made up of diode D3 and electric capacity C5; The P pole of described diode D3 is connected with the non-same polarity of secondary coil L3, its N pole is connected with the Same Name of Ends of secondary coil L3 after electric capacity C5, the Same Name of Ends ground connection of described secondary coil L3.
Described ON-OFF control circuit is made up of field effect transistor MOS, power amplifier P2, voltage comparator U1, inductance L 5 and resistance R3; Described inductance L 5 is serially connected between the output of power amplifier P1 and the N pole of diode D3, and the drain electrode of field effect transistor MOS is connected with the N pole of diode D3, its source electrode ground connection, its grid after resistance R3 are then connected with the output of power amplifier P2; The S end of voltage comparator U1 is connected with the output of oscillator, and its R end is connected with the output of current comparator I1, and its Q end is then connected with the end of oppisite phase of power amplifier P2; The in-phase end of power amplifier P2 is then connected with the drain electrode of field effect transistor MOS; The electrode input end of current comparator I2 is then connected with the two ends of resistance R3 with negative input, and its output is connected with the tie point of resistance R15 with resistance R16; The electrode input end of current comparator I1 is then connected with the output of power amplifier P1; The output of described NAND gate IC3 is then connected with the negative input of current comparator I1 with the end of oppisite phase of power amplifier P1 respectively.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) initiative of the present invention beam excitation formula logic amplifying circuit is applied to, in pulse width modulated power supply, therefore can guarantee the output quality of power supply.
(2) initiative of the present invention slope equalizer and voltage, current comparator are used in a power, not only effectively reduce circuit self and external radio frequency interference, but also greatly simplify circuit structure, cost of manufacture and maintenance cost are had reduction by a relatively large margin.
(3) the present invention utilizes field effect transistor to form ON-OFF control circuit, the present invention is not only made to have possessed boost mode and decompression mode, but also making the change of full voltage range output current control between ± 0.1%, the output current change control range of more traditional switching power supply is greatly improved.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is virtual protection emitter-base bandgap grading manifold type amplification circuit structure schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, diode rectifier U, power amplifier P1, transformer T, switched filter circuit, power output circuit, transformation feedback circuit, ON-OFF control circuit, oscillator, current comparator I1, current comparator I2, slope equalizer W, sliding damper, beam excitation formula logic amplifying circuit and virtual protection emitter-base bandgap grading manifold type amplifying circuit have been the present invention includes.Wherein, transformer T is by the primary coil L1 being arranged on its former limit, and the secondary coil L2 and the secondary coil L3 that are arranged on its secondary form.The present invention is provided with a sliding tap on the primary coil L1 of transformer T, this sliding tap is then controlled by sliding damper, to guarantee to adjust turn ratio between the primary coil L1 of transformer T and secondary coil L2 and secondary coil L3 according to the Output rusults of ON-OFF control circuit, thus realize the output of different voltage.
As described in Figure 1, this beam excitation formula logic amplifying circuit is primarily of power amplifier P3, NAND gate IC1, NAND gate IC2, NAND gate IC3, negative pole is connected with the in-phase end of power amplifier P3, the polar capacitor C6 of positive pole ground connection after optical diode D4, one end is connected with the positive pole of polar capacitor C6, the resistance R4 of other end ground connection after diode D5, positive pole is connected with the tie point of diode D5 with resistance R4, the polar capacitor C7 of minus earth, one end is connected with the negative input of NAND gate IC1, the resistance R5 that the other end is connected with the in-phase end of power amplifier P3, be serially connected in the resistance R6 between the end of oppisite phase of power amplifier P3 and output, one end is connected with the output of NAND gate IC1, the resistance R7 that the other end is connected with the negative input of NAND gate IC3, positive pole is connected with the output of NAND gate IC2, the electric capacity C8 that negative pole is connected with the negative input of NAND gate IC3, and one end is connected with the positive pole of polar capacitor C7, the resistance R8 that the other end is connected with the negative input of NAND gate IC2 forms.
During connection, the electrode input end of described NAND gate IC1 is connected with the end of oppisite phase of power amplifier P3, and its output is connected with the electrode input end of NAND gate IC2, and the electrode input end of NAND gate IC3 is connected with the output of power amplifier P3; The output of described NAND gate IC3 is then connected with current comparator I1 with power amplifier P1 respectively, and the in-phase end of power amplifier P3 is connected with the cathode output end of diode rectifier U.
The input of diode rectifier U is used for the civil power of external 220V, between the cathode output end that switched filter circuit is then serially connected in this diode rectifier U and the in-phase end of power amplifier P1.As shown in Figure 1, this switched filter circuit is by triode Q1, and electric capacity C1, electric capacity C2, resistance R1, resistance R2 and diode D1 form.Wherein, the base stage of triode Q1 forms loop with its collector electrode in turn after resistance R2, diode D1 and resistance R1.Electric capacity C1 and resistance R1 is in parallel, and electric capacity C2 and resistance R2 is in parallel, to form typical RC filter circuit.Meanwhile, the collector electrode of triode Q1 is connected with the cathode output end of diode rectifier U, its grounded emitter; The cathode output end of diode rectifier U is then directly connected with the end of oppisite phase of power amplifier P1, and resistance R2 is then connected with the in-phase end of power amplifier P1 with the tie point of diode D1.Primary coil L1 and the diode D1 of described transformer T are in parallel.
In this switched filter circuit, resistance R1, electric capacity C1 and diode D1 form feedback-clamp circuit, can improve the peak-inverse voltage of conversion efficiency and reduction power amplifier P1 in-phase end.
Power output circuit is used for the direct voltage of stable output, and it is made up of diode D2, electric capacity C3, inductance L 4 and electric capacity C4.During connection, the P pole of diode D2 is connected with the Same Name of Ends of secondary coil L2, and its N pole is connected with the non-same polarity of secondary coil L2 after electric capacity C3.One end of described inductance L 4 is connected with the N pole of diode D2, the other end is connected with the non-same polarity of secondary coil L2 after electric capacity C4.The two ends of electric capacity C4 then as the output of whole power supply, for external loading provides required voltage and current.
Transformation feedback circuit is used for providing feedback operation voltage, to guarantee that ON-OFF control circuit can control sliding damper according to feedback voltage for ON-OFF control circuit.This transformation feedback circuit is then made up of diode D3 and electric capacity C5.During connection, the P pole of described diode D3 is connected with the non-same polarity of secondary coil L3, its N pole is connected with the Same Name of Ends of secondary coil L3 after electric capacity C5, meanwhile, and the Same Name of Ends ground connection of this secondary coil L3.
ON-OFF control circuit is switching control section of the present invention, and it is made up of field effect transistor MOS, power amplifier P2, voltage comparator U1, inductance L 5 and resistance R3.As shown in Figure 1, this inductance L 5 is serially connected between the output of power amplifier P1 and the N pole of diode D3, and the drain electrode of field effect transistor MOS is connected with the N pole of diode D3, its source electrode ground connection, its grid after resistance R3 are then connected with the output of power amplifier P2.
The S end of voltage comparator U1 is connected with the output of oscillator, and its R end is connected with the output of current comparator I1, and its Q end is then connected with the end of oppisite phase of power amplifier P2.The in-phase end of power amplifier P2 is then connected with the drain electrode of field effect transistor MOS.The electrode input end of current comparator I2 is connected with the two ends of negative input with resistance R3, and during to guarantee field effect transistor MOS conducting, it can collect operating voltage from resistance R3 two ends.
Simultaneously; the output of this current comparator I2 will be connected with the input of oscillator with the negative input of current comparator I1 respectively after virtual protection emitter-base bandgap grading manifold type amplifying circuit; to guarantee that slope equalizer W can provide auxiliary slope-compensation for current comparator I1, make its working stability.
The electrode input end of current comparator I1 is then connected with the non-same polarity of primary coil L1 with the output of power amplifier P1.Meanwhile, the output of described NAND gate IC3 is also connected with the negative input of current comparator I1 with the end of oppisite phase of power amplifier P1 respectively.
The structure of described virtual protection emitter-base bandgap grading manifold type amplifying circuit as shown in Figure 2, it is by triode Q2, triode Q3, power amplifier P4, power amplifier P5, be serially connected in the resistance R10 between the end of oppisite phase of power amplifier P4 and output, be serially connected in the polar capacitor C11 between the in-phase end of power amplifier P5 and output, be serially connected in the resistance R9 between the in-phase end of power amplifier P4 and the collector electrode of triode Q2, be serially connected in the resistance R11 between the collector electrode of triode Q2 and the base stage of triode Q3, the electric capacity C10 be in parallel with resistance R11, negative pole is connected with the in-phase end of power amplifier P4, the polar capacitor C9 that positive pole is connected with the emitter of triode Q2 after resistance R12, be serially connected in the resistance R13 between the base stage of triode Q3 and the positive pole of polar capacitor C9, positive pole is connected with the emitter of triode Q3, negative pole is in turn through electric capacity C12 that voltage stabilizing didoe D6 is connected with the output of power amplifier P4 after resistance R14, P pole is connected with the output of power amplifier P5, the diode D7 that N pole is connected with the tie point of resistance R14 with voltage stabilizing didoe D6 after resistance R15 through resistance R16, and P pole is connected with the negative pole of electric capacity C12, the voltage stabilizing didoe D8 that N pole is connected with the tie point of resistance R16 with diode D7 forms.
Meanwhile, the base stage of described triode Q2 is connected with the positive pole of polar capacitor C9, and its emitter is connected with the emitter of triode Q3, and its collector electrode is connected with the end of oppisite phase of power amplifier P4; The collector electrode of triode Q3 is connected with the end of oppisite phase of power amplifier P5, and the in-phase end of power amplifier P5 is connected with the output of power amplifier P4.
During connection, the positive pole of described polar capacitor C9 is then connected with the negative input of current comparator I1 after slope equalizer W, and resistance R16 is then connected with the output of current comparator I2 with the tie point of resistance R15.
As mentioned above, just the present invention can well be realized.
Claims (6)
1. the pulse width modulated power supply of beam excitation of a logic-based protection emitter-base bandgap grading manifold type, primarily of diode rectifier U, power amplifier P1, transformer T, be serially connected in the switched filter circuit between diode rectifier U and power amplifier P1, the power output circuit be connected with the secondary coil L2 of transformer T, the transformation feedback circuit be connected with the secondary coil L3 of transformer T, the ON-OFF control circuit be connected with transformation feedback circuit, the oscillator be connected with ON-OFF control circuit, the current comparator I1 be connected with ON-OFF control circuit, the current comparator I2 be connected with ON-OFF control circuit, the slope equalizer W be connected with current comparator I1 with oscillator, respectively with power amplifier P1, the beam excitation formula logic amplifying circuit that current comparator I1 and diode rectifier U is connected, and output is connected with the tap on the primary coil L1 of transformer T, and the sliding damper that input is connected with the output of power amplifier P1 forms, it is characterized in that, virtual protection emitter-base bandgap grading manifold type amplifying circuit is also serially connected with between slope equalizer W and current comparator I2, described virtual protection emitter-base bandgap grading manifold type amplifying circuit is primarily of triode Q2, triode Q3, power amplifier P4, power amplifier P5, be serially connected in the resistance R10 between the end of oppisite phase of power amplifier P4 and output, be serially connected in the polar capacitor C11 between the in-phase end of power amplifier P5 and output, be serially connected in the resistance R9 between the in-phase end of power amplifier P4 and the collector electrode of triode Q2, be serially connected in the resistance R11 between the collector electrode of triode Q2 and the base stage of triode Q3, the electric capacity C10 be in parallel with resistance R11, negative pole is connected with the in-phase end of power amplifier P4, the polar capacitor C9 that positive pole is connected with the emitter of triode Q2 after resistance R12, be serially connected in the resistance R13 between the base stage of triode Q3 and the positive pole of polar capacitor C9, positive pole is connected with the emitter of triode Q3, negative pole is in turn through electric capacity C12 that voltage stabilizing didoe D6 is connected with the output of power amplifier P4 after resistance R14, P pole is connected with the output of power amplifier P5, the diode D7 that N pole is connected with the tie point of resistance R14 with voltage stabilizing didoe D6 after resistance R15 through resistance R16, and P pole is connected with the negative pole of electric capacity C12, the voltage stabilizing didoe D8 that N pole is connected with the tie point of resistance R16 with diode D7 forms, the base stage of described triode Q2 is connected with the positive pole of polar capacitor C9, and its emitter is connected with the emitter of triode Q3, and its collector electrode is connected with the end of oppisite phase of power amplifier P4, the collector electrode of triode Q3 is connected with the end of oppisite phase of power amplifier P5, and the in-phase end of power amplifier P5 is connected with the output of power amplifier P4, the positive pole of described polar capacitor C9 is then connected with the negative input of current comparator I1 after slope equalizer W, and resistance R16 is then connected with the output of current comparator I2 with the tie point of resistance R15.
2. the pulse width modulated power supply of beam excitation of a kind of logic-based protection emitter-base bandgap grading manifold type according to claim 1, it is characterized in that, described beam excitation formula logic amplifying circuit is primarily of power amplifier P3, NAND gate IC1, NAND gate IC2, NAND gate IC3, negative pole is connected with the in-phase end of power amplifier P3, the polar capacitor C6 of positive pole ground connection after optical diode D4, one end is connected with the positive pole of polar capacitor C6, the resistance R4 of other end ground connection after diode D5, positive pole is connected with the tie point of diode D5 with resistance R4, the polar capacitor C7 of minus earth, one end is connected with the negative input of NAND gate IC1, the resistance R5 that the other end is connected with the in-phase end of power amplifier P3, be serially connected in the resistance R6 between the end of oppisite phase of power amplifier P3 and output, one end is connected with the output of NAND gate IC1, the resistance R7 that the other end is connected with the negative input of NAND gate IC3, positive pole is connected with the output of NAND gate IC2, the electric capacity C8 that negative pole is connected with the negative input of NAND gate IC3, and one end is connected with the positive pole of polar capacitor C7, the resistance R8 that the other end is connected with the negative input of NAND gate IC2 forms, the electrode input end of described NAND gate IC1 is connected with the end of oppisite phase of power amplifier P3, and its output is connected with the electrode input end of NAND gate IC2, and the electrode input end of NAND gate IC3 is connected with the output of power amplifier P3, the output of described NAND gate IC3 is then connected with current comparator I1 with power amplifier P1 respectively, and the in-phase end of power amplifier P3 is connected with the cathode output end of diode rectifier U.
3. the pulse width modulated power supply of beam excitation of a kind of logic-based protection emitter-base bandgap grading manifold type according to claim 2, it is characterized in that, described switched filter circuit is by triode Q1, and electric capacity C1, electric capacity C2, resistance R1, resistance R2 and diode D1 form; The base stage of described triode Q1 forms loop with its collector electrode in turn after resistance R2, diode D1 and resistance R1, and electric capacity C1 and resistance R1 is in parallel, and electric capacity C2 and resistance R2 is in parallel; The collector electrode of triode Q1 is connected with the cathode output end of diode rectifier U, its grounded emitter; The cathode output end of diode rectifier U is then directly connected with the end of oppisite phase of power amplifier P1, and resistance R2 is then connected with the in-phase end of power amplifier P1 with the tie point of diode D1; The primary coil L1 of transformer T is then in parallel with diode D1.
4. the pulse width modulated power supply of beam excitation of a kind of logic-based protection emitter-base bandgap grading manifold type according to claim 3; it is characterized in that; the diode D2 that described power output circuit is connected with the Same Name of Ends of secondary coil L2 by P pole, N pole is connected with the non-same polarity of secondary coil L2 after electric capacity C3, and the inductance L 4 that one end is connected with the N pole of diode D2, the other end is connected with the non-same polarity of secondary coil L2 after electric capacity C4 forms.
5. the pulse width modulated power supply of beam excitation of a kind of logic-based protection emitter-base bandgap grading manifold type according to claim 4, it is characterized in that, described transformation feedback circuit is made up of diode D3 and electric capacity C5; The P pole of described diode D3 is connected with the non-same polarity of secondary coil L3, its N pole is connected with the Same Name of Ends of secondary coil L3 after electric capacity C5, the Same Name of Ends ground connection of described secondary coil L3.
6. the pulse width modulated power supply of beam excitation of a kind of logic-based protection emitter-base bandgap grading manifold type according to claim 5, it is characterized in that, described ON-OFF control circuit is made up of field effect transistor MOS, power amplifier P2, voltage comparator U1, inductance L 5 and resistance R3; Described inductance L 5 is serially connected between the output of power amplifier P1 and the N pole of diode D3, and the drain electrode of field effect transistor MOS is connected with the N pole of diode D3, its source electrode ground connection, its grid after resistance R3 are then connected with the output of power amplifier P2; The S end of voltage comparator U1 is connected with the output of oscillator, and its R end is connected with the output of current comparator I1, and its Q end is then connected with the end of oppisite phase of power amplifier P2; The in-phase end of power amplifier P2 is then connected with the drain electrode of field effect transistor MOS; The electrode input end of current comparator I2 is then connected with the two ends of resistance R3 with negative input, and its output is connected with the tie point of resistance R15 with resistance R16; The electrode input end of current comparator I1 is then connected with the output of power amplifier P1; The output of described NAND gate IC3 is then connected with the negative input of current comparator I1 with the end of oppisite phase of power amplifier P1 respectively.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410713497.1A CN104410281A (en) | 2014-11-28 | 2014-11-28 | Beam-excited pulse width modulation power supply based on logic protection emitter-coupled mode |
| CN201510324236.5A CN104967339A (en) | 2014-11-28 | 2015-06-12 | Filtering amplification excitation PWM power supply based on logic protection emitter coupling mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410713497.1A CN104410281A (en) | 2014-11-28 | 2014-11-28 | Beam-excited pulse width modulation power supply based on logic protection emitter-coupled mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104410281A true CN104410281A (en) | 2015-03-11 |
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| CN201510324236.5A Withdrawn CN104967339A (en) | 2014-11-28 | 2015-06-12 | Filtering amplification excitation PWM power supply based on logic protection emitter coupling mode |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967339A (en) * | 2014-11-28 | 2015-10-07 | 成都雷克尔科技有限公司 | Filtering amplification excitation PWM power supply based on logic protection emitter coupling mode |
| CN107579668A (en) * | 2017-09-19 | 2018-01-12 | 嘉善强锐五金制品厂（普通合伙） | A kind of ox horn is cramped the control circuit of aperture apparatus |
| CN109116173A (en) * | 2018-09-12 | 2019-01-01 | 中车浦镇庞巴迪运输***有限公司 | A kind of rail traffic vehicles ground detection device and detection method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106816069A (en) * | 2015-12-01 | 2017-06-09 | 重庆尊来科技有限责任公司 | A kind of two input nand gate formula frequency scopes |
| CN105425706A (en) * | 2015-12-16 | 2016-03-23 | 成都飞凯瑞科技有限公司 | Intelligent control system for range hood based on logic gate protection circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101226411B (en) * | 2008-01-22 | 2013-09-25 | 佛山市顺德区瑞德电子实业有限公司 | Power consumption measuring and control method for sound system switch power source as well as special device thereof |
| CN101551262B (en) * | 2009-04-26 | 2011-04-13 | 浙江恒光汽车部件有限公司 | Air flow detection circuit of digital air flow meter |
| CN104410281A (en) * | 2014-11-28 | 2015-03-11 | 成都措普科技有限公司 | Beam-excited pulse width modulation power supply based on logic protection emitter-coupled mode |
-
2014
- 2014-11-28 CN CN201410713497.1A patent/CN104410281A/en active Pending
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- 2015-06-12 CN CN201510324236.5A patent/CN104967339A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967339A (en) * | 2014-11-28 | 2015-10-07 | 成都雷克尔科技有限公司 | Filtering amplification excitation PWM power supply based on logic protection emitter coupling mode |
| CN107579668A (en) * | 2017-09-19 | 2018-01-12 | 嘉善强锐五金制品厂（普通合伙） | A kind of ox horn is cramped the control circuit of aperture apparatus |
| CN109116173A (en) * | 2018-09-12 | 2019-01-01 | 中车浦镇庞巴迪运输***有限公司 | A kind of rail traffic vehicles ground detection device and detection method |
| CN109116173B (en) * | 2018-09-12 | 2023-09-12 | 中车浦镇阿尔斯通运输***有限公司 | Rail transit vehicle grounding detection device and detection method |
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| CN104967339A (en) | 2015-10-07 |
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Application publication date: 20150311 |