CN111474872A - Ultrasonic wave generation and control circuit system - Google Patents
Ultrasonic wave generation and control circuit system Download PDFInfo
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- CN111474872A CN111474872A CN201910070241.6A CN201910070241A CN111474872A CN 111474872 A CN111474872 A CN 111474872A CN 201910070241 A CN201910070241 A CN 201910070241A CN 111474872 A CN111474872 A CN 111474872A
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 41
- 238000004804 winding Methods 0.000 claims description 37
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 23
- 229910052710 silicon Inorganic materials 0.000 claims description 23
- 239000010703 silicon Substances 0.000 claims description 23
- 230000003287 optical effect Effects 0.000 claims description 21
- 230000000087 stabilizing effect Effects 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 18
- 239000003921 oil Substances 0.000 claims description 10
- 238000005070 sampling Methods 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 230000001629 suppression Effects 0.000 claims description 4
- 230000001052 transient effect Effects 0.000 claims description 4
- 238000002604 ultrasonography Methods 0.000 claims 3
- 239000000446 fuel Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000007921 spray Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
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Abstract
The invention discloses a circuit system of an ultrasonic wave generating and controlling circuit system, which comprises a self-boosting ultrasonic wave voltage generating circuit structure and an automatic control protecting circuit structure, wherein the automatic control protecting circuit system comprises a power supply control circuit, a synchronous control circuit, an overcurrent self-locking protecting circuit and a synchronous normal self-locking protecting circuit. The invention can be applied to an ultrasonic wave generating device, in particular to an ultrasonic wave fuel exciting device or a humidifying device, and has the characteristics of stable frequency, high power, low energy consumption and wide application range. And the effects of automatic control and self-boosting are realized.
Description
Technical Field
The invention relates to a circuit system, in particular to an ultrasonic wave generation and control circuit system.
Background
At present, ultrasonic wave generating and controlling circuits used in the market are mostly used in humidifying devices and other ultrasonic wave generating devices, but the existing ultrasonic wave generating and controlling circuits are generally only suitable for stabilizing circuits of common families, and have the defects of unstable frequency, large heat productivity, large power consumption, small use range and many defects.
Disclosure of Invention
The invention provides a circuit system for an ultrasonic fuel excitation device, and aims to solve the technical problems of unstable frequency, large heat productivity, large power consumption and small application range in the conventional ultrasonic generation and control circuit.
The circuit system of the ultrasonic wave generation and control circuit system comprises a self-boosting ultrasonic wave voltage generation circuit structure and an automatic control protection circuit structure, wherein the automatic control protection circuit system at least comprises a power supply control circuit and a synchronous control circuit.
The self-boosting ultrasonic voltage generation circuit system is provided with a first high-frequency transformer (T), a common input end (1 pin) of two primary windings of the first high-frequency transformer (T) after being connected in parallel with a reverse end joint is connected in series with an eighth inductor (8) and then connected with the positive electrode of a main power supply (VCC), output ends (2 pins and 3 pins) of two primary windings of the first high-frequency transformer (T) after being connected in series with the negative electrode of a third Schottky diode (SBD), the negative electrode of the third Schottky diode (SBD) is connected with the drain electrode (D) of the third Schottky diode (N-MOSFET), the source electrode (S) of the third Schottky diode (T) is connected in series with a ninth inductor (9) and then connected with the negative electrode of the circuit, the grid electrode (G) and the source electrode (S) of the third Schottky diode (SBD) are connected in parallel with a first transient voltage suppression diode (TVS), a third resistor (R), a third capacitor (C), a third Schottky diode (VT-MOSFET) and a fourth Schottky diode (SBD), the drain electrode (SBD) after being connected with the positive electrode of the fourth Schottky diode (SBD), the third Schottky diode (SBD), the fourth Schottky diode (V-MOSFET) after being connected in series with the drain electrode (S-MOSFET (V-MOSFET), the positive electrode (V-MOSFET) and the fourth Schottky diode (V-MOSFET) after being connected with the fourth Schottky diode (V-MOSFET), the fourth Schottky diode (V-MOSFET) and the fourth Schottky diode (V-MOSFET) after being connected in series with the fourth MOSFET (V-MOSFET), the fourth Schottky diode (V-MOSFET) and the fourth Schottky diode (V-.
The power control circuit comprises a power receiving door lock control power supply (ACC), a first relay (KA 1), a second switch tube N-MOSFET (VT 2) and a main power supply (VCC) for controlling the first relay (KA 1) and the second switch tube N-MOSFET (VT 2) to be switched on or switched off. An electromagnetic control signal input end (pin 1) of the first relay (KA 1) is connected with the cathode of a fourth diode (D4), and the anode of the fourth diode (D4) is connected with the anode of an electric door lock control power supply (ACC); the electromagnetic control signal output end (2 feet) of the first relay (KA 1) is connected with the drain (D pole) of the second switch tube N-MOSFET (VT 2); the source electrode of the second switch tube N-MOSFET (VT 2) is connected with the negative electrode of the power-receiving door lock control power supply (ACC); the grid electrode (G pole) of the second switch tube N-MOSFET (VT 2) is connected in series with the tenth resistor (R10) and then is connected to the anode of the fourth diode (D4); the grid electrode (G pole) of the second switch tube N-MOSFET (VT 2) is connected with the negative electrode of the fourth voltage-regulator tube (ZD 4), and the source electrode (S pole) of the second switch tube N-MOSFET (VT 2) is connected with the positive electrode of the fourth voltage-regulator tube (ZD 4); a power input end (3 pins) of the first relay (KA 1) is connected with a fuse (F) in series and then is connected with one end of a main switch (K); the other end of the main switch (K) is connected with the positive pole of a main power supply (VCC).
Synchronous control circuit includes first opto-coupler (N1) through oil nozzle pulse width signal drive, the switch that drives second relay (KA 2) is switched on and ends to this first opto-coupler (N1) first switch tube N-MOSFET of isolation control (VT 1), thereby accomplish the oil nozzle and have the just synchronous state of work of oil spout circuit, and realize automatic control, safety, it is convenient, adopt the opto-coupler drive to keep apart oil spout pulse signal and circuit, mutual interference does not. The grid (G pole) and the source (S pole) of the first switch tube N-MOSFET (VT 1) are connected in parallel with a first capacitor (C1) and a sixth resistor (R6) to delay the pulse width so as to smooth the conducting state of the first switch tube N-MOSFET (VT 1). The electromagnetic control signal input end (pin 1) of the second relay (KA 2) is connected with the power input end (pin 3); the electromagnetic control signal output end (2 feet) of the second relay (KA 2) is connected with the drain (D pole) of the first switch tube N-MOSFET (VT 1), and the power input end (3 feet) of the second relay (KA 2) is connected with the normally open end (4 feet) of the first relay (KA 1); the source electrode of the first switch tube N-MOSFET (VT 1) is connected with the negative electrode of a main power supply (VCC); the grid electrode of the first switch tube N-MOSFET (VT 1) is connected with the cathode of the second voltage-stabilizing diode (VD 2); the source electrode of the first switch tube N-MOSFET (VT 1) is connected with the anode of the second voltage-stabilizing diode (ZD 2), and the grid electrode and the source electrode of the first switch tube N-MOSFET (VT 1) are connected with a first capacitor (C1) and a sixth resistor (R6) in parallel; and a normally closed end (4 pins) of the second relay (KA 2) is connected with a seventeenth resistor (R17) in series and then is connected with the anode of the first light-emitting diode (VD 1), and the cathode of the first light-emitting diode (VD 1) is connected with the cathode of a main power supply (VCC). The circuit synchronization state is indicated by the mutual switching of the light emitting diodes VD1 and VD 2. The normally open end (pin 2) of the second relay (KA 2) is connected with the anode of a fifth Schottky diode (SBD 5) at the tail end of the main power supply (VCC), and the cathode of the fifth Schottky diode (SBD 5) is used as the anode of an anode output terminal (Vo) of the automatic control protection circuit.
As one of the preferred embodiments, the automatic control protection circuit system further comprises a synchronous abnormal self-locking protection circuit, wherein the synchronous abnormal self-locking protection circuit comprises a first optical coupler (N1), and an end point of the signal input positive end (pin 1) of the first optical coupler (N1) and an eighteenth resistor (R18) after being connected IN series is used as a positive connecting end of an oil nozzle pulse signal connection (IN); a signal input negative end (2 pins) of a first optical coupler (N1) is used as a negative connecting end of an oil nozzle pulse signal (IN); a signal output positive terminal (3 pins) of a first optocoupler (N1) is connected with a thirteenth resistor (R13) in series and then is connected with a power input terminal (3 pins) of a second relay (KA 2); and a signal output negative electrode terminal (4 pins) of the first optical coupler (N1) is connected with a grid electrode (G pole) of a first switch tube N-MOSFET (VT 1).
As a preferred embodiment, the synchronous abnormal self-locking protection circuit further comprises a one-way Silicon Controlled Rectifier (SCR), wherein the anode (a pole) of the one-way Silicon Controlled Rectifier (SCR) is connected with the cathode of a third light-emitting diode (VD 3), and the anode of the third light-emitting diode (VD 3) is connected with a twelfth resistor (R12) in series and then is connected with the power input end (pin 3) of a first relay (KA 1); a control electrode (G electrode) of the unidirectional Silicon Controlled Rectifier (SCR) is connected with the negative electrode of a third voltage stabilizing diode (ZD 3), and the positive electrode of the third voltage stabilizing diode (ZD 3) is connected with the negative electrode (K electrode) of the unidirectional Silicon Controlled Rectifier (SCR); a control electrode (G electrode) of the unidirectional Silicon Controlled Rectifier (SCR) and a cathode (K electrode) are connected in parallel with a ninth resistor (R9) and a ninth capacitor (C9); a signal input positive terminal (1 st pin) of a third optical coupler (N3) is connected with an eleventh resistor (R11) in series and then is connected with a power input terminal (3 pins) of a first relay (KA 1); a signal input negative end (2 pins) of a third optocoupler (N3) is connected with an anode (A pole) of a unidirectional Silicon Controlled Rectifier (SCR); a third optocoupler signal output positive terminal (pin 3) is connected with a grid (G pole) of a second switch tube N-MOSFET (VT 2); and the signal output negative terminal (4 pins) of the third optical coupler (N3) is connected with the source (S pole) of the N-MOSFET (VT 2) of the second switching tube.
In one preferred embodiment, the synchronous abnormal self-locking protection circuit comprises a first triode (Q1), wherein a base set (b pole) of the first triode (Q1) is connected with a seventh resistor (R7) in series and then is connected with a grid (G pole) of a first switch tube N-MOSFET (VT 1); one path of a collector (C pole) of the first triode (Q1) is connected in series with the anode of the sixth diode (D6) and then is connected with a control pole (G pole) of the unidirectional Silicon Controlled Rectifier (SCR); the other path is connected with a fifth resistor (R5) in series and then is connected with a pin of a normally open end (5) of a second relay (KA 2); the emitter (e pole) of the first triode (Q1) is connected with the negative pole of the main power supply (VCC).
As one of the preferred embodiments, the overcurrent self-locking protection circuit comprises a sampling Resistor (RS) connected in series with the negative electrode of a main power supply (VCC), and a signal non-inverting input end (pin 1) of an overcurrent detection chip (IC) is connected with a low potential end of the sampling Resistor (RS); one path of the positive electrode (pin 5) of the input end of a voltage-stabilizing power supply of an over-current detection chip (IC) is connected in series with a fifteenth resistor (R15), then connected in series with a fourteenth resistor (R14) and finally connected with a high-potential end of a sampling Resistor (RS); the other path is connected with an over-current detection (IC) signal output end (pin 3) after being connected with a twentieth resistor (R20) in series; an overcurrent detection (IC) signal inverting input end (pin 2) is connected with the midpoint of the serial connection of a fifteenth resistor (R15) and a fourteenth resistor (R14); an overcurrent detection (IC) (pin 4) is connected with the negative electrode of the power supply; an overcurrent detection (IC) signal output end (pin 3) is connected in series through a sixteenth resistor (R16) and then is connected with a signal input positive end (pin 1) of a second optocoupler (N2); a signal of a second optical coupler (N2) is input into a negative pole end (2 feet) and is connected with a negative pole of a power supply (V-shaped CC 1); a signal output positive terminal (pin 1) of a second optocoupler (N2) is connected with a nineteenth resistor (R19) in series and then is connected with the positive electrode of an electric door lock control power supply (ACC); and a signal output negative terminal (4 pins) of a second optical coupler (N2) is connected in series with the anode of a fifth diode (D5) and then is connected with a control electrode (G pole) of a unidirectional Silicon Controlled Rectifier (SCR).
As one of the preferred embodiments, the positive terminal of a main power supply (VCC) in the automatic control protection circuit is connected with one end of a main switch (K), the other end of the main switch is connected with a power supply terminal (3 pins) of a first relay (KA 1) after being connected with a fuse (F) in series, the positive terminal of an eighth capacitor (C8) is connected with a normally open terminal (4 pins) of the first relay (KA 1), and the negative terminal of the eighth capacitor (C8) is connected with the negative terminal of the main power supply (VCC). The normally open end (pin 5) of the second relay (KA 2) is connected with the anode of a fifth Schottky diode (SBD 5); and the cathode of the fifth Schottky diode (SBD 5) is used as the anode of the output end (Vo) of the automatic control protection circuit.
In one preferred embodiment, the power supply is controlled by a power receiving door lock (ACC) to be turned on and off to control the circuit main power supply (VCC) to be turned on and off.
As one of the preferred embodiments, the pulse signal of the fuel spray nozzle pulse signal after being isolated and coupled by the first optical coupler (N1) is adopted to synchronously control the on and off of the main power supply (VCC) through the control circuit, and the fuel spray nozzle pulse signal source is not interfered.
As one of the preferred embodiments, when the pulse signal of the oil nozzle and the main power supply (VCC) work out of synchronization and the circuit overcurrent fault occur, the circuit can timely lock and disconnect the main power supply (VCC) to play a role in protection.
In a preferred embodiment, in the self-boosting ultrasonic wave generating circuit, a gate (G pole) of a third switching tube N-MOSFET (VT 3) is connected in series with a secondary winding inductor (L2) of a second high-frequency transformer (T2) and a second capacitor (C2) in sequence and then connected with a gate (G pole) of a fourth switching tube N-MOSFET (VT 4).
In the self-boosting ultrasonic wave generation circuit, a grid electrode (G pole) of a third switching tube N-MOSFET (VT 3) is connected with a third inductor (L3) in series and then is connected with the anode of a first diode (D1), the cathode of the first diode (D1) is connected with the cathode of a first voltage stabilizing diode (ZD 1), the anode of the first voltage stabilizing diode (ZD 1) is connected with a ninth inductor (L9) in series and then is connected with the cathode of a main power supply (VCC), the grid electrode (G pole) of a fourth switching tube N-MOSFET (VT 4) is connected with a fourth inductor (L4) in series and then is connected with the anode of a second diode (D2), the cathode of the second diode (D2) is connected with the cathode of the first voltage stabilizing diode (ZD 1), and the anode and the cathode of the first voltage stabilizing diode (ZD 1) are connected with a fifth capacitor (C5) in parallel.
In the self-boosting ultrasonic generating circuit, a secondary winding output end (pin 5) of a first high-frequency transformer (T1) is sequentially connected in series with a primary winding inductor (L5) of a second high-frequency transformer (T2) and a first capacitor (C1) and then connected with a secondary output end (pin 4) of the first transformer (T1), and a secondary output end (pin 5) of a first high-frequency transformer (T1) is sequentially connected in series with a primary preset adjustable multi-winding inductor (L1) of a third high-frequency transformer (T3) and an ultrasonic transducer piece or device (X) and then connected with a secondary output end (pin 4) of the first high-frequency transformer (T1).
In one preferred embodiment, in the self-boosting ultrasonic wave generating circuit, two ends of an output winding inductor (L6) of a third high-frequency transformer (T3) are connected with two alternating current input ends of a third high-frequency rectifier bridge (D3), a positive end of the third high-frequency rectifier bridge (D3) is connected with a twenty-first resistor (R21) in series and then is connected with a positive end of a fourth light emitting diode (VD 4), and a negative end of the fourth light emitting diode (VD 4) is connected with a negative end of the third high-frequency rectifier bridge.
In one preferred embodiment, a sixth capacitor (C6) and a seventh capacitor (C7) are connected in parallel between the positive electrode and the negative electrode of the main power supply (VCC).
As a preferred embodiment, a series frequency-selecting resonant circuit consisting of a third capacitor (C3), a second inductor (L2), a second capacitor (C2) and a fourth capacitor (C4) provides driving current for a grid electrode (G electrode) of a third switching tube N-MOSFET (VT 3) and a grid electrode (G electrode) of a fourth switching tube N-MOSFET (VT 4), and the circuit has the characteristics of small driving current, easiness in driving, good high frequency-selecting characteristic of a Q value of the resonant circuit and stable frequency.
As one preferred embodiment, the direct current voltage stabilizing starting circuit is composed of a first resistor (R1), a third inductor (L3), a first diode (D1), a second resistor (R2), a fourth inductor (L4), a first voltage stabilizing diode (ZD 1) and a fifth capacitor (C5), and provides stable and appropriate oscillation starting direct current voltage for the grid electrode (G electrode) of the third switch tube N-MOSFET (VT 3) and the grid electrode (G electrode) of the fourth switch tube N-MOSFET (VT 4).
In a preferred embodiment, a series branch consisting of a primary winding inductor (L5) of a second high-frequency transformer (T2) and a first capacitor (C1) is connected in parallel to output ends (5 pins and 4 pins) of a secondary winding of a first high-frequency transformer (T1), a series branch consisting of a primary multi-winding preset adjustable inductor (L1) of a third high-frequency transformer (T3) and an ultrasonic transducer (X) is connected in parallel to form an equivalent parallel resonant circuit, and a resonant frequency of the parallel resonant circuit is coupled and fed back to a series driving circuit consisting of a second inductor (L2), a second capacitor (C2), a fourth capacitor (C4) and a third capacitor (C3) which are connected in series in sequence through a secondary winding (L5) of the second high-frequency transformer, so as to provide a driving frequency and a driving current for the series driving circuit.
As one of the preferred embodiments, the third schottky diode (SBD 3) can prevent reverse current from flowing through the source (S pole) and drain (D pole) of the third switching transistor N-MOSFET (VT 3); the first Schottky diode (SBD 1) provides a reverse current channel for the source (S pole) and the drain (D pole) of the third switch tube N-MOSFET (VT 3); the fourth Schottky diode (SBD 4) can prevent reverse current from flowing through the source (S pole) drain (D pole) of the fourth switch tube N-MOSFET (VT 4); the second Schottky diode (SBD 2) provides a reverse current path for the source (S pole) and the drain (D pole) of the N-MOSFET (VT 4) of the fourth switch tube.
The invention can be applied to an ultrasonic wave generating device, in particular to an ultrasonic wave fuel exciting device or a humidifying device, and has the characteristics of stable frequency, high power, low energy consumption and wide application range. And the effects of automatic control and self-boosting are realized.
Drawings
Fig. 1 is a schematic diagram of a self-boosting ultrasonic wave generating circuit according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an automatic control protection circuit according to an embodiment of the present invention.
Detailed Description
The structure of the ultrasonic fuel excitation device according to the invention is further illustrated by the following example:
the invention uses fuel oil automobile as example for convenience of description because different equipment has different power supply voltage and different position obtaining modes of control (sensor) signals.
As shown in fig. 1, the self-boosting ultrasonic generating circuit system of the embodiment is provided with a first high-frequency transformer T, a common input terminal (pin 1) of the first high-frequency transformer T after two primary windings of the first high-frequency transformer T are connected in series through an eighth inductor 8 and then connected with a main power supply positive electrode, the first high-frequency transformer T is provided with output terminals (pin 2 and pin 3) of the two primary windings of the first high-frequency transformer T which are in reverse connection, namely, an output terminal of the primary winding, an output terminal (pin 2) of the first high-frequency transformer T is connected in series with a third schottky diode SBD positive electrode, a third schottky diode SBD negative electrode is connected with a third switching transistor N-VT drain electrode (D), the third switching transistor N-MOSFET (VT) source electrode (S) is connected in series with a ninth inductor 9 and then connected with a main power supply VCC negative electrode, the third switching transistor N-MOSFET (VT) gate electrode (G) and source electrode (S) are connected in parallel with a first transient voltage suppression diode TVS, a third switching transistor N-MOSFET (VT) resistor R, a third capacitor N-MOSFET (VT) source electrode (VT) and source electrode (S) are connected in series with a fourth switching transistor SBD, a fourth switching transistor SBD positive electrode, a fourth switching transistor SBD, a fourth switching transistor N-MOSFET (SBD-MOSFET positive electrode, a fourth switching transistor N-MOSFET (SBD, a fourth switching transistor N-MOSFET positive electrode, a fourth switching transistor N-MOSFET (v-MOSFET) and a fourth switching transistor N-MOSFET (v diode (v-MOSFET) and a fourth switching transistor N-v diode (v-MOSFET (v diode (v) and a fourth switching transistor) are connected after a fourth switching transistor) and a fourth switching transistor (v diode connected with a fourth switching transistor).
The grid electrode (G pole) of the third switch tube N-MOSFET (VT 3) is connected with one end of the secondary winding inductor L2 of the second high-frequency transformer T2, and the secondary winding inductor L2 of the third high-frequency transformer T2 is connected with the grid electrode (G pole) of the fourth switch tube N-MOSFET (VT 4) after being connected with the second capacitor C2 in series.
The grid (G pole) of a third switching tube N-MOSFET (VT 3) is connected with the anode of a first diode D1 after being connected with a third inductor L in series, the cathode of a first diode D1 is connected with the cathode of a first voltage stabilizing diode ZD1, the anode of a first voltage stabilizing diode ZD1 is connected with the cathode of a main power supply of a circuit after being connected with a ninth inductor 639, the grid (G pole) of a fourth switching tube N-MOSFET (VT 4) is connected with the anode of a second diode D2 after being connected with a fourth inductor L in series, the cathode of the second diode D2 is connected with the cathode of the first voltage stabilizing diode ZD1, and the anode and the cathode of the first voltage stabilizing diode ZD1 are connected with a fifth capacitor C5 in parallel.
The output end (5 feet) of a secondary winding of a first high-frequency transformer T1 is connected with one end of a primary winding inductor L of a second high-frequency transformer T2, the other end of a secondary winding inductor L of the second high-frequency transformer T2 is connected with a first capacitor C1 in series and then is connected with a secondary output end (4 feet) of a first transformer T1, the output end (5 feet) of a secondary winding of a first high-frequency transformer T1 is connected with one end of a primary preset adjustable multi-winding inductor L of a third high-frequency transformer T3, the other end of the primary preset adjustable multi-winding inductor L of the third high-frequency transformer T3 is connected with an ultrasonic transducer or device X in series and then is connected with a secondary output end (4 feet) of the first high-frequency transformer T1, the two ends of an output winding inductor L of the third high-frequency transformer T3 are connected with two alternating current input ends of a third high-frequency rectifier bridge D3, the positive end of the third high-frequency rectifier bridge D6 is connected with a twenty-first resistor R21 in series and then is connected with the positive electrode of a fourth light.
A sixth capacitor C6 and a seventh capacitor C7. are connected in parallel between the positive electrode and the negative electrode of the main power supply VCC, and a series frequency-selecting resonant circuit composed of a third capacitor C3, a second inductor L2, a second capacitor C2 and a fourth capacitor C4 provides a driving current for a grid (G pole) of a third switching tube N-MOSFET (VT 3) and a grid (G pole) of a fourth switching tube N-MOSFET (VT 4).
The direct-current voltage-stabilizing starting circuit consists of a first resistor R1, a third inductor L3, a first diode D1, a second resistor R2, a fourth inductor L4, a first voltage-stabilizing diode ZD1 and a fifth capacitor C5 and provides stable and proper oscillation starting direct-current voltage for a grid (G pole) of a third switching tube N-MOSFET (VT 3) and a grid (G pole) of a fourth switching tube N-MOSFET (VT 4).
The output end (5 pins and 4 pins) of the secondary winding of the first high-frequency transformer T1 is connected in parallel with a serial branch consisting of a primary winding inductor L5 of a second high-frequency transformer T2 and a first capacitor C1, a serial branch consisting of a primary multi-winding preset adjustable inductor L1 of a third high-frequency transformer T3 and an ultrasonic transducer X, the two serial branches are connected in parallel to form an equivalent parallel resonant loop, and the resonant frequency of the parallel resonant loop is coupled and fed back to a serial driving loop consisting of a second inductor L2, a second capacitor C2, a fourth capacitor C4 and a third capacitor C3 which are sequentially connected in series through the secondary winding L5 of the second high-frequency transformer, and a driving frequency and a driving current are provided for the serial driving loop.
The third schottky diode SBD3 can prevent reverse current from flowing through the source (S) and drain (D) of the third switch transistor N-MOSFET (VT 3); the first Schottky diode (SBD 1) provides a reverse current channel for the source (S pole) and the drain (D pole) of the third switch tube N-MOSFET (VT 3); the fourth schottky diode SBD4 can prevent reverse current from flowing through the source (S) and drain (D) of the fourth switch transistor N-MOSFET (VT 4); the second schottky diode SBD2 provides a reverse current path for the source (S) and drain (D) of the fourth switching transistor N-MOSFET (VT 4).
Fig. 2 shows an automatic control protection circuit diagram of an ultrasonic fuel excitation device, which comprises the following circuit structures:
the automatic control protection circuit system comprises a power supply control circuit, a synchronous control circuit, an overcurrent self-locking protection circuit and a synchronous normal self-locking protection circuit.
The power control circuit comprises a first relay KA1, an electromagnetic control signal input end (pin 1) of the first relay KA1 is connected with the cathode of a fourth diode D4, and the anode of the fourth diode D4 is connected with the anode of a power-receiving door lock control power ACC; an electromagnetic control signal output end (2 pins) of the first relay KA1 is connected with a drain electrode (D pole) of a second switch tube N-MOSFET (VT 2); the source (S pole) of the N-MOSFET (VT 2) of the second switch tube is connected with the negative pole of the power-receiving door lock control power supply ACC. The switch-on and switch-off of the main power VCC of the circuit are controlled by controlling the switch-on and switch-off of the ACC power supply through the receiving door lock. The grid electrode (G pole) of the second switch tube N-MOSFET (VT 2) is connected with the tenth resistor R10 in series and then is connected to the anode of the fourth diode D4; the grid electrode (G pole) of the second switch tube N-MOSFET (VT 2) is connected with the negative electrode of the fourth voltage-regulator tube ZD4, and the source electrode (S pole) of the second switch tube N-MOSFET (VT 2) is connected with the positive electrode of the fourth voltage-regulator tube ZD 4; a power supply input end (pin 3) of the first relay KA1 is connected with one end of a main switch K after being connected with a fuse F in series; the other end of the master switch K is connected with the positive pole of a main power supply VCC. The positive electrode of the eighth capacitor C8 is connected with the normally open end (pin 4) of the first relay KA1, and the negative electrode of the eighth capacitor C8 is connected with the negative electrode of the main power supply VCC. The normally open end (pin 5) of the second relay KA2 is connected with the anode of a fifth Schottky diode SBD 5; the cathode of the fifth Schottky diode SBD5 is used as the anode of the output end Vo of the automatic control protection circuit.
The synchronous control circuit comprises a second relay KA2, and an electromagnetic control signal input end (pin 1) of the second relay KA2 is connected with a power supply input end (pin 3); the electromagnetic control signal output end (pin 2) of the second relay KA2 is connected with the drain (pole D) of the first switch tube N-MOSFET (VT 1), and the power supply input end (pin 3) of the second relay KA2 is connected with the normally open end (pin 4) of the first relay KA 1; a source electrode (S pole) of a first switch tube N-MOSFET (VT 1) is connected with a negative pole of a main power supply VCC; the grid electrode (G pole) of the first switch tube N-MOSFET (VT 1) is connected with the negative pole of the second voltage-stabilizing diode VD 2; a source electrode (S pole) of the first switch tube N-MOSFET (VT 1) is connected with the anode of the second voltage stabilizing diode ZD2, and a grid electrode and a source electrode of the first switch tube N-MOSFET (VT 1) are connected with a first capacitor C1 and a sixth resistor R6 in parallel; a normally closed end (4 pins) of the second relay KA2 is connected with the anode of the first light-emitting diode VD1 after being connected in series through a seventeenth resistor R17, and the cathode of the first light-emitting diode VD1 is connected with the cathode of a main power VCC; the normally open end (pin 2) of the second relay KA2 is connected with the anode of a fifth Schottky diode SBD5 at the tail end of the main power VCC, and the cathode of the fifth Schottky diode SBD5 is used as the anode of an anode output terminal Vo of the automatic control protection circuit.
Synchronous unusual auto-lock protection circuit can prevent that second relay KA2 from becoming invalid and fuel sprayer pulse signal asynchronous to lead to ultrasonic wave transducer piece and circuit to damage. The fuel injector comprises a first optical coupler N1, wherein the signal input positive terminal (pin 1) of the first optical coupler N1 is connected with the eighteenth resistor R18 IN series, and the terminal point is used as the IN positive connecting end for pulse signal connection of the fuel injector; a signal input negative end (2 pins) of a first optocoupler N1 is used as a negative connecting end of a pulse signal IN from an oil nozzle; a signal output positive terminal (pin 3) of a first optocoupler N1 is connected with a thirteenth resistor R13 in series and then is connected with a power input terminal (pin 3) of a second relay KA 2; and a signal output negative electrode terminal (4 pins) of the first optical coupler N1 is connected with a grid electrode (G pole) of a first switch tube N-MOSFET (VT 1). The anode (A pole) of the one-way silicon controlled rectifier SCR is connected with the cathode of a third light-emitting diode VD3, and the anode of the third light-emitting diode VD3 is connected with a twelfth resistor R12 in series and then is connected with the power supply input end (3 pins) of a first relay KA 1; the control electrode (G pole) of the one-way silicon controlled rectifier SCR is connected with the negative pole of a third voltage stabilizing diode ZD3, and the positive pole of the third voltage stabilizing diode ZD3 is connected with the negative pole (K pole) of the one-way silicon controlled rectifier SCR; a ninth resistor R9 and a ninth capacitor C9 are connected in parallel with a control electrode (G electrode) and a cathode (K electrode) of the unidirectional silicon controlled rectifier SCR, and a third optocoupler N3 signal input positive terminal (pin 1) is connected in series with an eleventh resistor R11 and then is connected with a power input end (pin 3) of the first relay KA 1; a signal input negative end (2 pins) of a third optocoupler N3 is connected with an anode (A pole) of a unidirectional Silicon Controlled Rectifier (SCR); a third optocoupler signal output positive terminal (pin 3) is connected with a grid (G pole) of a second switch tube N-MOSFET (VT 2); and the signal output negative electrode end (4 pins) of the third optical coupler N3 is connected with the source electrode (S pole) of the second switch tube N-MOSFET (VT 2). A base collector (b pole) of a first triode Q1 is connected with a seventh resistor R7 in series and then is connected with a grid (G pole) of a first switch tube N-MOSFET (VT 1); one path of the C pole of the collector electrode of the first triode Q1 is connected with the anode of a sixth diode D6 in series and then is connected with the control electrode (G pole) of the unidirectional silicon controlled rectifier SCR; the other path is connected in series with a fifth resistor R5 and then is connected with a normally open end (pin 5) of a second relay KA 2; the emitter (e pole) of the first triode Q1 is connected to the negative pole of the main power supply VCC. The fuel spray nozzle pulse signal is isolated and coupled by a first optocoupler N1, and then the pulse signal is subjected to control circuit to synchronously control the on and off of a main power VCC without interfering with a fuel spray nozzle pulse signal source. When the circuit is out of synchronization with the main power supply VCC in the process of generating the fuel spray nozzle pulse signal and the overcurrent fault of the circuit, the main power supply VCC can be locked and disconnected in time, and the protection effect is achieved.
The overcurrent self-locking protection circuit comprises a sampling resistor RS which is connected in series with the negative electrode of a main power supply VCC, and an IC signal in-phase input end (pin 1) of the overcurrent detection chip is connected with the low potential end of the sampling resistor RS; one path of the positive electrode (pin 5) of the input end of the voltage-stabilizing power supply of the over-current detection chip IC is connected in series with a fifteenth resistor R15, then is connected in series with a fourteenth resistor R14 and finally is connected with the high-potential end of a sampling resistor RS; the other path is connected with an over-current detection IC signal output end (pin 3) after being connected with a twentieth resistor R20 in series; an inverting input end (pin 2) of an over-current detection IC signal is connected with the middle point of the serial connection of the fifteenth resistor R15 and the fourteenth resistor R14; the overcurrent detection IC (pin 4) is connected with the negative electrode of the power supply; an overcurrent detection IC signal output end (pin 3) is connected in series through a sixteenth resistor R16 and then is connected with a second optocoupler N2 signal input positive end (pin 1); a signal input negative end (pin 2) of the second optocoupler N2 is connected with a power supply negative electrode; a signal output positive terminal (pin 1) of a second optocoupler N2 is connected with a nineteenth resistor R19 in series and then connected with the positive electrode of an electric door lock control power supply ACC; and a signal output negative terminal (4 pins) of a second optocoupler N2 is connected with the anode of a fifth diode D5 in series and then is connected with a control electrode (G pole) of the unidirectional silicon controlled rectifier SCR.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. An ultrasonic wave generation and control circuit system is characterized in that the circuit system of the ultrasonic wave generation and control circuit system comprises a self-boosting ultrasonic wave voltage generation circuit structure and an automatic control protection circuit structure,
the self-boosting ultrasonic voltage generating circuit structure is provided with a first high-frequency transformer (T), a common input end (1 pin) of the first high-frequency transformer (T) after two primary windings are connected in parallel with each other in a reverse end manner is connected in series with an eighth inductor (8) and then is connected with a main power supply (VCC), the first high-frequency transformer (T) is provided with output ends (2 pins and 3 pins) of the two primary windings which are in reverse directions, namely output ends of the primary windings, an output end (2 pin) of the first high-frequency transformer (T) is connected in series with a third Schottky diode (SBD), the third Schottky diode (SBD) is connected with a drain electrode (D) of a third switching tube N-MOSFET (VT), a source electrode (S pole) of the third switching tube N-MOSFET (VT) is connected in series with a ninth inductor (9) and then is connected with the main power supply (VCC), the gate electrode (G pole) and the source electrode (S pole) of the third switching tube N-MOSFET (VT) are connected in parallel with a transient voltage suppression diode (TVS, a third transient voltage suppression diode (TVS pole), a third switching tube N-MOSFET (VT) and a drain electrode (S pole) are connected with a fourth Schottky diode (SBD), a fourth switching tube (SBD), a third switching tube (SBD) and a fourth switching tube (V-MOSFET) are connected with a third switch (V-MOSFET) and a fourth switch diode (V-MOSFET) and a fourth switch (V-MOSFET) and a fourth switch (V-MOSFET) after a fourth switch (V-MOSFET) are connected in series inductor (V-MOSFET) and a fourth switch (V-MOSFET) and a fifth switch (V-MOSFET) and a fourth switch (V-MOSFET) and a fifth switch (V-MOSFET) and a fourth switch (V-MOSFET;
the automatic control protection circuit structure comprises
The power supply control circuit comprises a power receiving door lock control power supply (ACC), a first relay (KA 1), a second switch tube N-MOSFET (VT 2) and a main power supply (VCC) for controlling the first relay (KA 1) and the second switch tube N-MOSFET (VT 2) to be switched on or switched off; and the synchronous control circuit comprises a first optical coupler (N1) driven by a pulse width signal, the first optical coupler (N1) controls the conduction and the cut-off of a first switch tube N-MOSFET (VT 1) to drive the switch of the second relay (KA 2), and the grid (G pole) and the source (S pole) of the first switch tube N-MOSFET (VT 1) are connected with a first capacitor (C1) and a sixth resistor (R6) in parallel.
2. The ultrasound generation and control circuitry of claim 1, wherein: the automatic control protection circuit structure also comprises a synchronous abnormal self-locking protection circuit, wherein an end point of a signal input positive terminal (1 pin) of the first optocoupler (N1) after being connected with an eighteenth resistor (R18) IN series is used as a positive connecting end for connecting pulse signals (IN) of the oil nozzle; a signal input negative end (2 pins) of a first optical coupler (N1) is used as a negative connecting end of a pulse signal (IN) from an oil nozzle; the signal output positive terminal (pin 3) of the first optocoupler (N1) is connected with the power input terminal (pin 3) of the second relay (KA 2); and a signal output negative electrode terminal (4 pins) of the first optical coupler (N1) is connected with a grid electrode (G pole) of a first switch tube N-MOSFET (VT 1).
3. The ultrasound generation and control circuitry of claim 2, wherein: the synchronous abnormal self-locking protection circuit also comprises a one-way Silicon Controlled Rectifier (SCR), the anode (A pole) of the one-way Silicon Controlled Rectifier (SCR) is connected with a third light-emitting diode (VD 3), and the third light-emitting diode (VD 3) is connected with a twelfth resistor (R12) in series and then is connected with the power input end (pin 3) of the first relay (KA 1); a control electrode (G electrode) of the unidirectional Silicon Controlled Rectifier (SCR) is connected with a third voltage stabilizing diode (ZD 3), and the third voltage stabilizing diode (ZD 3) is connected with a cathode (K electrode) of the unidirectional Silicon Controlled Rectifier (SCR); a control electrode (G electrode) of a unidirectional Silicon Controlled Rectifier (SCR) and a cathode (K electrode) are connected in parallel with a ninth resistor (R9) and a ninth capacitor (C9), and a signal input positive terminal (pin 1) of a third optocoupler (N3) is connected in series with an eleventh resistor (R11) and then connected with a power input terminal (pin 3) of a first relay (KA 1); a signal input negative end (2 pins) of a third optocoupler (N3) is connected with an anode (A pole) of a unidirectional Silicon Controlled Rectifier (SCR); a signal output positive terminal (3 pins) of a third optocoupler (N3) is connected with a grid (G pole) of a second switch tube N-MOSFET (VT 2); a signal output negative electrode end (4 pins) of a third optical coupler (N3) is connected with a source electrode (S pole) of a second switch tube N-MOSFET (VT 2); the synchronous abnormal self-locking protection circuit also comprises a first triode (Q1), wherein a base set (b pole) of the first triode (Q1) is connected with a seventh resistor (R7) in series and then is connected with a grid (G pole) of a first switch tube N-MOSFET (VT 1); one path of a collector electrode (C pole) of the first triode (Q1) is connected with a sixth diode (D6) in series and then is connected with a control pole (G pole) of a unidirectional Silicon Controlled Rectifier (SCR); the other path is connected with a fifth resistor (R5) in series and then is connected with a normally open end (pin 5) of a second relay (KA 2); the emitter (e pole) of the first triode (Q1) is connected with the negative pole of the main power supply (VCC).
4. The ultrasound generation and control circuitry of claim 1, wherein: the automatic control protection circuit structure also comprises an overcurrent self-locking protection circuit, the overcurrent self-locking protection circuit comprises a sampling Resistor (RS) which is connected in series with the negative electrode of a main power supply (VCC), and an overcurrent detection chip (IC) signal in-phase input end (pin 1) is connected with a low potential end of the sampling Resistor (RS); one path of the positive electrode (pin 5) of the input end of a voltage-stabilizing power supply of an over-current detection chip (IC) is connected in series with a fifteenth resistor (R15), then connected in series with a fourteenth resistor (R14) and finally connected with a high-potential end of a sampling Resistor (RS); the other path is connected with an over-current detection (IC) signal output end (pin 3) after being connected with a twentieth resistor (R20) in series; an overcurrent detection (IC) signal inverting input end (pin 2) is connected with the midpoint of the serial connection of a fifteenth resistor (R15) and a fourteenth resistor (R14); the overcurrent detection IC (pin 4) is connected with the negative electrode of the power supply; an over-current detection IC signal output end (pin 3) is connected in series with a sixteenth resistor (R16) and then is connected with a signal input positive end (pin 1) of a second optical coupler (N2); a signal input negative terminal (pin 2) of a second optical coupler (N2) is connected with the negative pole of the power supply; a signal output positive terminal (pin 1) of a second optocoupler (N2) is connected with a nineteenth resistor (R19) in series and then is connected with the positive electrode of an electric door lock control power supply (ACC); and a signal output negative terminal (4 pins) of a second optical coupler (N2) is connected in series with the anode of a fifth diode (D5) and then is connected with a control electrode (G pole) of a unidirectional Silicon Controlled Rectifier (SCR).
5. The ultrasonic wave generating and controlling circuit system according to claim 1, wherein in the self-boosting ultrasonic wave generating circuit, the gate (G-pole) of the N-MOSFET (VT 3) of the third switching tube is connected to one end of the secondary winding inductor (L2) of the second high frequency transformer (T2), and the other end of the secondary winding inductor (L2) of the second high frequency transformer (T2) is connected in series with the second capacitor (C2) and then connected to the gate (G-pole) of the N-MOSFET (VT 4) of the fourth switching tube.
6. The ultrasonic wave generating and controlling circuit system according to claim 1, wherein in the self-boosting ultrasonic wave generating circuit, the grid (G pole) of a third switching tube N-MOSFET (VT 3) is connected in series with a third inductor (L3) and then connected with the anode of a first diode (D1), the cathode of the first diode (D1) is connected with the cathode of a first voltage stabilizing diode (ZD 1), the anode of the first voltage stabilizing diode (ZD 1) is connected in series with a ninth inductor (L9) and then connected with the cathode of a main power supply (VCC), the grid (G pole) of a fourth switching tube N-MOSFET (VT 4) is connected in series with a fourth inductor (L4) and then connected with the anode of a second diode (D2), and the cathode of the second diode (D2) is connected with the cathode of the first voltage stabilizing diode (ZD 1).
7. The ultrasonic wave generating and controlling circuit system according to claim 1, wherein in the self-boosting ultrasonic wave generating circuit, the secondary winding output terminal (pin 5) of the first high frequency transformer (T1) is connected to one end of the primary winding inductor (L5) of the second high frequency transformer (T2), the other end of the primary winding inductor (L5) of the high frequency transformer (T2) is connected in series with the first capacitor (C1) and then connected to the secondary output terminal (pin 4) of the first transformer (T1), the secondary output terminal (pin 5) of the first high frequency transformer (T1) is connected in series with one end of the primary preset adjustable multi-winding inductor (L1) of the third high frequency transformer (T3), and the other end of the primary preset adjustable multi-winding inductor (L1) of the third high frequency transformer (T3) is connected in series with the ultrasonic transducer or device (X) and then connected to the secondary output terminal (pin 4) of the first high frequency transformer T1.
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| US20140001957A1 (en) * | 2011-04-28 | 2014-01-02 | Guangdong Greenlight Photoelectric Technology Co., Ltd | High intensity discharge electronic ballast circuit, electronic ballast, and high intensity discharge lamp |
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