CN212935794U - Inversion analog circuit - Google Patents

Abstract

The utility model discloses an inversion analog circuit, which comprises a trigger module, a transformer, an AC-DC conversion module, a signal acquisition module, an inversion module with the output end connected with the input end of the transformer and a power supply module for supplying power to the trigger module and the inversion module, wherein the output end of the transformer and the input end of the signal acquisition module are connected through the AC-DC conversion module; the trigger module comprises a first transistor Q5, a second transistor Q6, a third transistor Q7, a fourth transistor Q8, a first resistor R4 and a second resistor R6; the trigger module is provided with a plurality of signal input ends for controlling the conduction of a first transistor Q5, a second transistor Q6, a third transistor Q7 and a fourth transistor Q8; the inversion module is a single-phase bridge inversion circuit formed by four triodes, and the input end of the inversion module is reversely connected with the high-potential ends of the first transistor Q5 and the third transistor Q7 and the low-potential ends of the second transistor Q6 and the fourth transistor Q8; the utility model discloses the operating voltage that needs is low, and the security is high, circuit structure is simple and with low costs.

Description

Inversion analog circuit

Technical Field

The utility model relates to an electronic circuit technical field, more specifically say, it relates to an contravariant analog circuit.

Background

With the continuous advance of industrialization, the demand of human beings for energy is continuously increased, and resource exhaustion becomes a major crisis faced by human beings. An inverter is an important power conversion device in the field of power electronics, and is widely applied to various industrial fields; the high-frequency and high-voltage power supply equipment for dust removal is important equipment for providing a working power supply for the dust removal equipment, and supplies power to the dust removal equipment through an internally-arranged IBGT inverter; however, in practical application, the conventional inverter is generally directly connected to a household voltage 220V for power supply, and only can perform voltage reduction and inversion, and the circuit is complex and high in cost; in the development, debugging and production process of the variable frequency power supply for dust removal, a power supply source commonly used in a laboratory is only 24V, and if a high-voltage power supply is adopted for supplying power to and debugging the inverter circuit, engineering technicians are contacted with the high-power high-voltage inverter circuit in a short distance for a long time, so that high-voltage potential safety hazards are inevitably generated.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide an contravariant analog circuit for the low pressure low frequency DC power supply in laboratory converts the smooth direct current of low pressure high frequency to, has the security height, circuit structure is simple and advantage with low costs.

In order to achieve the above purpose, the utility model provides a following technical scheme:

an inversion analog circuit comprises a power supply module, a trigger module, an inversion module, a transformer, an AC-DC conversion module and a signal acquisition module, wherein the input end and the output end of the AC-DC conversion module are respectively connected with the output end of the transformer and the input end of the signal acquisition module, and the power supply module supplies power to the trigger module and the inversion module;

the trigger module comprises a first transistor Q5, a second transistor Q6, a third transistor Q7, a fourth transistor Q8, a first resistor R4 and a second resistor R6, wherein the low-potential ends of the first transistor Q5 and the third transistor Q7 are both grounded, and the high-potential ends of the second transistor Q6 and the fourth transistor Q8 are respectively connected with the output end of the power supply module through the first resistor R4 and the second resistor R6; the trigger module is provided with a plurality of signal input ends for receiving external control signals, and the signal input ends are respectively coupled with the control ends of the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8;

the inverter module is a single-phase bridge inverter circuit formed by four triodes, the input end of the inverter module is reversely connected with the high-potential ends of the first transistor Q5 and the third transistor Q7 and the low-potential ends of the second transistor Q6 and the fourth transistor Q8, and the output end of the inverter module is connected with the input end of the transformer.

Further setting: the inverter module comprises a first switch Q1, a second switch Q2, a third switch Q3 and a fourth switch Q4, wherein the first switch Q1 and the second switch Q2 are PNP type triodes, the third switch Q3 and the fourth switch Q4 are NPN type triodes, the collectors of the first switch Q1 and the fourth switch Q4 are connected with one node of the input end of the transformer, and the collectors of the first switch Q1 and the fourth switch Q4 are respectively connected with the other node of the input end of the transformer; the emitters of the first switch Q1 and the second switch Q2 are connected with the power supply module, and the emitters of the third switch Q3 and the fourth switch Q4 are grounded; a third resistor R2 is connected in series between the base of the first switch Q1 and the high potential end of the first transistor Q5, a fourth resistor R8 is connected in series between the base of the second switch Q2 and the high potential end of the third transistor Q7, the base of the third switch Q3 is connected to the low potential end of the second transistor Q6, and the base of the fourth switch Q3 is connected to the low potential end of the fourth transistor Q6.

Further setting: the inversion module further comprises a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4, wherein the cathode and the anode of the first diode D1 are respectively connected with the emitter and the collector of the first switch Q1; the cathode and the anode of the second diode D2 are respectively connected with the emitter and the collector of the second switch Q2; the cathode and the anode of the third diode D3 are respectively connected with the emitter and the collector of the third switch Q3; the cathode and the anode of the fourth diode D4 are connected to the emitter and the collector of the fourth switch Q4, respectively.

Further setting: the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8 are all NPN-type triodes, and current-limiting resistors are connected in series between the bases of the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8 and the signal input end respectively.

Further setting: the AC-DC conversion module adopts a full-wave rectification circuit consisting of four diodes.

Further setting: and an LED load module is connected between the AC-DC conversion module and the transformer.

Further setting: the signal acquisition module comprises a voltage acquisition module and a current acquisition module, the voltage acquisition module is connected with the current acquisition module in series, and the voltage acquisition module is connected with a first switch S1 in parallel;

the current acquisition module comprises a fifth resistor R11, a sixth resistor R12, a first sliding resistor RP1 and a second switch S2, wherein the output end of the fifth resistor R11 is connected with the input end of a sixth resistor R12, the input end of the fifth resistor R11 is connected with the input end 1 of the first sliding resistor RP, the output end of the sixth resistor R12 is connected with the output end of the first sliding resistor RP1, the junction point of the sixth resistor R12 and the first sliding resistor RP1 is connected with the input end of the voltage acquisition module, and the first sliding resistor RP1 is connected with the second switch S2 in parallel;

the voltage acquisition module comprises a capacitor C7, a controllable precision voltage-stabilizing source D10, a second sliding resistor RP2, a light-emitting diode LED2 and a third switch S3, wherein the capacitor C7, the controllable precision voltage-stabilizing source D10, the light-emitting diode LED2, the second sliding resistor RP2 and the third switch S3 are sequentially connected in parallel, the anode of the controllable precision voltage-stabilizing source D10 is connected with a seventh resistor R13 in series, the cathode of the light-emitting diode LED2 is connected with an eighth resistor R14 in series, the seventh resistor R13 is connected with an eighth resistor R14 in parallel, and the cathode of the controllable precision voltage-stabilizing source D10 and the anode of the light-emitting diode LED2 are both grounded.

Further setting: the controllable precise voltage-stabilizing source D10 is of TL431 type.

To sum up, the utility model provides a low voltage DC power supply for the trigger module and the inversion module through the power module; then, high level signals are received through signal input ends corresponding to the first transistor Q5 and the second transistor Q6, the first transistor Q5 and the second transistor Q6 are turned on, and the third transistor Q7 and the fourth transistor Q8 are turned off, so that two arms connected with a high-potential end of the first transistor Q5 and a low-potential end of the second transistor Q6 respectively are triggered to be turned on; receiving high level signals through signal input ends corresponding to a third transistor Q7 and a fourth transistor Q8, turning on the third transistor Q7 and the fourth transistor Q8, and turning off the first transistor Q5 and the second transistor Q6, so that the other two arms connected with a high-potential end of a third transistor Q7 and a low-potential end of a fourth transistor Q8 respectively are triggered to be turned on to work, and the effect of converting the low-voltage direct-current power supply into low-voltage alternating-current voltage is achieved; the function of boosting the high-frequency alternating current after frequency conversion is realized through a transformer; the function of converting the boosted alternating current into direct current is realized through an AC-DC conversion module; finally, the function of collecting low-voltage high-frequency smooth direct current is realized through a signal collecting module; the utility model discloses a low voltage power supply is applicable to the laboratory power supply debugging, and whole circuit adopts low-voltage electricity, and the security is high, and the circuit is simple and components and parts are with low costs.

Drawings

Fig. 1 is an overall circuit diagram of an embodiment of the present invention;

fig. 2 is a circuit diagram of an inverter module and a trigger module according to an embodiment of the present invention;

fig. 3 is a diagram of a current collection module and a voltage collection module according to an embodiment of the present invention;

fig. 4 is a circuit block diagram of the present invention.

In the figure: 1. a power supply module; 2. a triggering module; 3. an inversion module; 4. a transformer; 5. an AC-DC conversion module; 6. a signal input terminal; 7. an LED load module; 8. a current limiting resistor; 9. a current collection module; 10 voltage acquisition module.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

The utility model discloses the most crucial design lies in: a low-voltage direct-current power supply is provided for the trigger module 2 and the inversion module 3 through the power module 1; when the switch is in work, high-level signals are received by the signal input ends corresponding to the first transistor Q5 and the second transistor Q6 and the signal input ends corresponding to the third transistor Q7 and the fourth transistor Q8 in sequence, so that the first transistor Q5 and the second transistor Q6 are used as one group, the third transistor Q7 and the fourth transistor Q8 are used as another group, and the two groups are conducted in sequence, so that the two groups are triggered and controlled to be respectively connected with the two corresponding arms of the high-potential end of the first transistor Q5 and the low-potential end of the second transistor Q6, and respectively connected with the two corresponding arms of the high-potential end of the third transistor Q7 and the low-potential end of the fourth transistor Q8 to be conducted in sequence for work, and further the effect of converting low-voltage direct-current power supply into low-voltage; the voltage after frequency conversion is boosted through the transformer 4; the function of converting the boosted alternating current into direct current is realized through the AC-DC conversion module 5; finally, the function of collecting the low-voltage high-frequency direct current after inversion conversion is realized through a signal input end 6; the utility model discloses an adopt the low pressure power supply, be applicable to the laboratory power supply debugging, and whole circuit adopts low-voltage electricity, and the security is high, and simultaneously, trigger module 2 and contravariant module 3 adopt simple triode and transistor to constitute, and the circuit is simple and components and parts are with low costs, and the practicality is high.

Referring to fig. 1 to 4, an inverter analog circuit includes a power module 1, a trigger module 2, an inverter module 3, a transformer 4, an AC-DC conversion module 5 and a signal input terminal 6, wherein an input terminal and an output terminal of the AC-DC conversion module 5 are respectively connected to an output terminal of the transformer 4 and an input terminal of the signal input terminal 6, and the power module 1 supplies power to the trigger module 2 and the inverter module 3;

the trigger module 2 comprises a first transistor Q5, a second transistor Q6, a third transistor Q7, a fourth transistor Q8, a first resistor R4 and a second resistor R6, the low-potential ends of the first transistor Q5 and the third transistor Q7 are both grounded, and the high-potential ends of the second transistor Q6 and the fourth transistor Q8 are connected with the output end of the power module 1 through the first resistor R4 and the second resistor R6 respectively; the trigger module 2 is provided with a plurality of signal input ends for receiving external control signals, and the signal input ends are respectively coupled with the control ends of the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8;

the inversion module 3 is a single-phase bridge inversion circuit formed by four triodes, the input end of the inversion module 3 is respectively connected with the high-potential ends of the first transistor Q5 and the third transistor Q7 and the low-potential ends of the second transistor Q6 and the fourth transistor Q8, and the output end of the inversion module 3 is connected with the input end of the transformer 4.

As can be seen from the above description, when the power module 1 normally provides low-voltage dc power for the trigger module 2 and the inverter module 3, the signal input terminals corresponding to the first transistor Q5 and the second transistor Q6 receive high-level signals, the first transistor Q5 and the second transistor Q6 are turned on, and the third transistor Q7 and the fourth transistor Q8 are turned off, so as to turn on the two arms corresponding to the connection of the high-potential terminal of the first transistor Q5 and the connection of the low-potential terminal of the second transistor Q6 in the trigger control inverter module 3; receiving high level signals through signal input ends corresponding to a third transistor Q7 and a fourth transistor Q8, turning on the third transistor Q7 and the fourth transistor Q8, and turning off the first transistor Q5 and the second transistor Q6, so that two arms in the trigger inversion module 3, which are connected with a high-potential end of the third transistor Q7 and connected with a low-potential end of the fourth transistor Q8, are turned on to work, and the low-voltage direct-current power supply is converted into low-voltage alternating-current voltage; then, the voltage after frequency conversion realizes the boosting effect through a transformer 4; the boosted low-voltage alternating current passes through the AC-DC conversion module 5 to realize the function of converting the alternating current into the direct current; finally, the low-voltage high-frequency smooth direct current after conversion passes through a signal input end 6 to realize the function of collecting the low-voltage high-frequency direct current after inversion conversion; the utility model discloses a low voltage power supply is applicable to the laboratory power supply debugging, avoids engineering technical staff closely for a long time and high-power high-pressure inverter circuit contact, the high-pressure potential safety hazard of bringing, and simultaneously, trigger module 2 and contravariant module 3 adopt simple triode and transistor to constitute, and the circuit is simple and components and parts are with low costs, and the practicality is high.

Further: the inverter module 3 comprises a first switch Q1, a second switch Q2, a third switch Q3 and a fourth switch Q4, the first switch Q1 and the second switch Q2 are PNP-type triodes, the third switch Q3 and the fourth switch Q4 are NPN-type triodes, collectors of the first switch Q1 and the fourth switch Q4 are connected with one node of the input end of the transformer 4, and collectors of the first switch Q1 and the fourth switch Q4 are respectively connected with the other node of the input end of the transformer 4; the emitters of the first switch Q1 and the second switch Q2 are connected with the power supply module 1, and the emitters of the third switch Q3 and the fourth switch Q4 are grounded; a third resistor R2 is connected in series between the base of the first switch Q1 and the high-potential end of the first transistor Q5, a fourth resistor R8 is connected in series between the base of the second switch Q2 and the high-potential end of the third transistor Q7, the base of the third switch Q3 is connected with the low-potential end of the second transistor Q6, and the base of the fourth switch Q3 is connected with the low-potential end of the fourth transistor Q6.

As can be seen from the above description, in operation, a high level signal is received through the signal input terminals corresponding to the first transistor Q5 and the second transistor Q6, so that the first transistor Q5 and the second transistor Q6 are turned on, and the third transistor Q7 and the fourth transistor Q8 are turned off, so that the first transistor Q5 triggers and controls the first switch Q1 to be turned on, and provides a high level for another node at the input terminal of the transformer 4, and the second transistor Q6 triggers and controls the third switch Q3 to be turned on, and provides a low level for a node at the input terminal; then, the signal input ends corresponding to the third transistor Q7 and the fourth transistor Q8 receive high level signals, so that the third transistor Q7 and the fourth transistor Q8 are turned on, the first transistor Q5 and the second transistor Q6 are turned off, the second switch Q2 is triggered and controlled to be turned on, a high level is provided for one node of the input end of the transformer 4, the fourth transistor Q8 is triggered and controlled to be turned on, the fourth switch Q4 is controlled to be turned on, and a low level is provided for the other node of the input end, so that the effect of converting the low-voltage direct current power supply into the low-voltage alternating current voltage is realized; the utility model discloses a first switch Q1 adopts PNP type triode with second switch Q2, and third switch Q3 and fourth switch Q4 adopt NPN type triode, and circuit structure is simple, utilizes PNP type triode and NPN type triode to have low price's advantage, plays the effect that further reduces whole circuit components and parts cost.

Further: the inverter module 3 further includes a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4, wherein a cathode and an anode of the first diode D1 are respectively connected to an emitter and a collector of the first switch Q1; the cathode and the anode of the second diode D2 are connected to the emitter and the collector of the second switch Q2, respectively; the cathode and the anode of the third diode D3 are connected with the emitter and the collector of the third switch Q3, respectively; the cathode and the anode of the fourth diode D4 are connected to the emitter and the collector of the fourth switch Q4, respectively.

As can be seen from the above description, the emitter and the collector of the first switch Q1 are connected in parallel with the first diode D1, the emitter and the collector of the first switch Q2 are connected in parallel with the first diode D2, the emitter and the collector of the first switch Q3 are connected in parallel with the first diode D3, and the emitter and the collector of the first switch Q4 are connected in parallel with the first diode D4, so that when the diodes are turned on, instantaneous energy is absorbed in time, instantaneous breakdown of the triodes is avoided, and the first switch Q1, the second switch Q2, the third switch Q3 and the fourth switch Q4 are protected, thereby prolonging the service life of the first switch Q1, the second switch Q2, the third switch Q3 and the fourth switch Q4, and further reducing the maintenance and replacement costs.

Further: the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8 are all NPN type triodes, and a current limiting resistor 8 is connected in series between the base electrodes of the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8 and the signal input end respectively.

As can be seen from the above description, the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8 are all NPN-type transistors, which further reduces the overall cost; the current limiting resistors 8 are connected in series between the base electrodes of the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8 and the signal input end respectively, so that the situation that the triodes are burnt out due to overlarge input voltage is avoided, the effects of protecting the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8 are achieved, the service lives of the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8 are prolonged, and the maintenance cost is further reduced.

Further: the AC-DC conversion module 5 is a full-wave rectification circuit composed of four diodes.

As can be seen from the above description, the AC-DC conversion module 5 uses a full-wave rectification circuit composed of four diodes, which further simplifies the circuit and reduces the cost of the whole circuit.

Further: an LED load module 7 is connected between the AC-DC conversion module 5 and the transformer 4.

As can be seen from the above description, by connecting the LED load module 7 between the AC-DC conversion module 5 and the transformer 4, the brightness of the lamp in the LED load module 7 is observed, and the voltage level after inversion is observed.

Further: the signal input end 6 comprises a voltage acquisition module 10 and a current acquisition module 9, the voltage acquisition module 10 is connected with the current acquisition module 9 in series, and the voltage acquisition module 10 is connected with a first switch S1 in parallel;

the current collection module 9 comprises a fifth resistor R11, a sixth resistor R12, a first sliding resistor RP1 and a second switch S2, wherein the output end of the fifth resistor R11 is connected with the input end of the sixth resistor R12, the input end of the fifth resistor R11 is connected with the input end of the first sliding resistor RP1, the output end of the sixth resistor R12 is connected with the output end of the first sliding resistor RP1, the junction of the sixth resistor R12 and the first sliding resistor RP1 is connected with the input end of the voltage collection module 10, and the first sliding resistor RP1 is connected with the second switch S2 in parallel;

the voltage acquisition module 10 comprises a capacitor C7, a controllable precision voltage-stabilizing source D10, a second sliding resistor RP2, a light-emitting diode LED2 and a third switch S3, wherein the capacitor C7, the controllable precision voltage-stabilizing source D10, the light-emitting diode LED2, the second sliding resistor RP2 and the third switch S3 are sequentially connected in parallel, the anode of the controllable precision voltage-stabilizing source D10 is connected in series with a seventh resistor R13, the cathode of the light-emitting diode LED2 is connected in series with an eighth resistor R14, the seventh resistor R13 is connected in parallel with the eighth resistor R14, and the cathode of the controllable precision voltage-stabilizing source D10 and the anode of the light-emitting diode LED2 are both grounded.

As can be seen from the above description, the voltage and current collection of the low-voltage high-frequency direct current after the inversion conversion is realized through the voltage collection module 10 and the current collection module 9 which are connected in series, when the first switch S1 connected in parallel with the voltage collection module 10 is turned off, the output of the voltage collection module 10 is zero, and the function of resetting without output voltage is achieved; when the voltage output by the AC-DC conversion module 5 reaches a preset value, the seventh resistor R13, the second sliding resistor RP2 and the eighth resistor R14 generate sufficient voltage drop, and the controllable precision voltage regulator D10 is turned on to provide stable voltage for the light emitting diode LED2, thereby achieving the effect of achieving constant voltage and reducing the influence of temperature drift; the effect of adjusting the size of the sampling voltage U2 is realized by adjusting the second sliding resistor RP2 of the voltage acquisition module 10; the capacitor C7 and the seventh resistor R13 are connected in parallel to form a low-pass filter, so that the output noise is reduced, the stable output voltage is provided conveniently, and the influence of temperature drift is further reduced; the effect of adjusting the magnitude of the sampling current I2 is realized by adjusting a first sliding resistor RP1 in the current acquisition module 9; the voltage acquisition module 10 and the current acquisition module 9 have simple circuits and low component cost.

Further: the controllable precision voltage stabilizing source D10 is TL431 type.

From the above description, the TL431 type is adopted as the controllable precise voltage regulator D10, and the advantages of high precision, good stability and low price of the TL431 precise voltage regulator are utilized to further improve the voltage stability of the circuit and reduce the cost of the whole circuit.

Referring to fig. 1 to 4, the present invention provides an embodiment:

an inversion analog circuit is shown in fig. 1 and 4, and comprises a power module 1, a trigger module 2, an inversion module 3, a transformer 4, an AC-DC conversion module 5 and a signal input end 6, wherein the input end of the AC-DC conversion module 5 is connected with the output end of the transformer 4, the output end of the AC-DC conversion module 5 is connected with the input end of the signal input end 6, the power module 1 supplies power to the trigger module 2 and the inversion module 3, and the transformer 4 is a step-up transformer;

as shown in fig. 1 and fig. 2, the trigger module 2 includes a first transistor Q5, a second transistor Q6, a third transistor Q7, a fourth transistor Q8, a first resistor R4 and a second resistor R6, the low potential terminals of the first transistor Q5 and the third transistor Q7 are both grounded, and the high potential terminals of the second transistor Q6 and the fourth transistor Q8 are connected to the output terminal of the power module 1 through the first resistor R4 and the second resistor R6, respectively; the trigger module 2 is provided with a plurality of signal input ends for receiving external control signals, the signal input ends are respectively coupled with the control ends of a first transistor Q5, a second transistor Q6, a third transistor Q7 and a fourth transistor Q8, the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8 are all NPN type triodes, and a current-limiting resistor 8 is respectively connected in series between the base electrodes of the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8 and the signal input ends.

As shown in fig. 1 and 3, the AC-DC conversion module 5 is a full-wave rectification circuit composed of four diodes; an LED load module 7 is connected between the AC-DC conversion module 5 and the transformer 4.

As shown in fig. 2, the inverter module 3 is a single-phase bridge inverter circuit formed by four transistors, the inverter module 3 includes a first switch Q1, a second switch Q2, a third switch Q3 and a fourth switch Q4, the first switch Q1 and the second switch Q2 are PNP transistors, and the third switch Q3 and the fourth switch Q4 are NPN transistors; collectors of the first switch Q1 and the fourth switch Q4 are connected with one node of the input end of the transformer 4, and collectors of the first switch Q1 and the fourth switch Q4 are respectively connected with the other node of the input end of the transformer 4; the emitters of the first switch Q1 and the second switch Q2 are connected with the power supply module 1, and the emitters of the third switch Q3 and the fourth switch Q4 are grounded; a third resistor R2 is connected in series between the base of the first switch Q1 and the high-potential end of the first transistor Q5, a fourth resistor R8 is connected in series between the base of the second switch Q2 and the high-potential end of the third transistor Q7, the base of the third switch Q3 is connected with the low-potential end of the second transistor Q6, and the base of the fourth switch Q3 is connected with the low-potential end of the fourth transistor Q6;

the inverter module 3 further includes a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4, wherein a cathode and an anode of the first diode D1 are respectively connected to an emitter and a collector of the first switch Q1; the cathode and the anode of the second diode D2 are connected to the emitter and the collector of the second switch Q2, respectively; the cathode and the anode of the third diode D3 are connected with the emitter and the collector of the third switch Q3, respectively; the cathode and the anode of the fourth diode D4 are connected to the emitter and the collector of the fourth switch Q4, respectively.

As shown in fig. 3 and 4, the signal input terminal 6 includes a voltage acquisition module 10 and a current acquisition module 9, the voltage acquisition module 10 is connected in series with the current acquisition module 9, and the voltage acquisition module 10 is connected in parallel with a first switch S1;

the current collection module 9 comprises a fifth resistor R11, a sixth resistor R12, a first sliding resistor RP1 and a second switch S2, wherein the output end of the fifth resistor R11 is connected with the input end of the sixth resistor R12, the input end of the fifth resistor R11 is connected with the input end of the first sliding resistor RP1, the output end of the sixth resistor R12 is connected with the output end of the first sliding resistor RP1, the junction of the sixth resistor R12 and the first sliding resistor RP1 is connected with the input end of the voltage collection module 10, and the first sliding resistor RP1 is connected with the second switch S2 in parallel;

the voltage acquisition module 10 comprises a capacitor C7, a controllable precise voltage-stabilizing source D10, a second sliding resistor RP2, a light-emitting diode LED2 and a third switch S3, wherein the capacitor C7, the controllable precise voltage-stabilizing source D10, the light-emitting diode LED2, the second sliding resistor RP2 and the third switch S3 are sequentially connected in parallel, the anode of the controllable precise voltage-stabilizing source D10 is connected in series with a seventh resistor R13, the cathode of the light-emitting diode LED2 is connected in series with an eighth resistor R14, the seventh resistor R13 is connected in parallel with the eighth resistor R14, and the cathode of the controllable precise voltage-stabilizing source D10 and the anode of the light-emitting diode LED2 are both grounded; the controllable precision voltage stabilizing source D10 is TL431 type.

To sum up, compared with the prior art, the utility model adopts low voltage electricity, has the advantages of high safety, simple circuit and low component cost, and provides low voltage direct current power supply for the trigger module 2 and the inversion module 3 through the power module 1; then, high level signals are received through signal input ends corresponding to the first transistor Q5 and the second transistor Q6, the first transistor Q5 and the second transistor Q6 are turned on, and the third transistor Q7 and the fourth transistor Q8 are turned off, so that two arms connected with a high-potential end of the first transistor Q5 and a low-potential end of the second transistor Q6 respectively are triggered to be turned on; receiving high level signals through signal input ends corresponding to a third transistor Q7 and a fourth transistor Q8, turning on the third transistor Q7 and the fourth transistor Q8, and turning off the first transistor Q5 and the second transistor Q6, so that the other two arms connected with a high-potential end of a third transistor Q7 and a low-potential end of a fourth transistor Q8 respectively are triggered to be turned on to work, and the effect of converting the low-voltage direct-current power supply into low-voltage alternating-current voltage is achieved; the transformer 4 is used for boosting the high-frequency alternating current after frequency conversion; the function of converting the boosted alternating current into direct current is realized through the AC-DC conversion module 5; and finally, the function of collecting low-voltage high-frequency direct current is realized through the signal input end 6.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. An inverting analog circuit, comprising: the power supply comprises a power supply module, a trigger module, an inversion module, a transformer, an AC-DC conversion module and a signal acquisition module, wherein the input end and the output end of the AC-DC conversion module are respectively connected with the output end of the transformer and the input end of the signal acquisition module, and the power supply module supplies power to the trigger module and the inversion module;

the trigger module comprises a first transistor Q5, a second transistor Q6, a third transistor Q7, a fourth transistor Q8, a first resistor R4 and a second resistor R6, wherein the low-potential ends of the first transistor Q5 and the third transistor Q7 are both grounded, and the high-potential ends of the second transistor Q6 and the fourth transistor Q8 are respectively connected with the output end of the power supply module through the first resistor R4 and the second resistor R6; the trigger module is provided with a plurality of signal input ends for receiving external control signals, and the signal input ends are respectively coupled with the control ends of the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8;

the inverter module is a single-phase bridge inverter circuit formed by four triodes, the input end of the inverter module is reversely connected with the high-potential ends of the first transistor Q5 and the third transistor Q7 and the low-potential ends of the second transistor Q6 and the fourth transistor Q8, and the output end of the inverter module is connected with the input end of the transformer.

2. The inverting analog circuit of claim 1, wherein: the inverter module comprises a first switch Q1, a second switch Q2, a third switch Q3 and a fourth switch Q4, wherein the first switch Q1 and the second switch Q2 are PNP type triodes, the third switch Q3 and the fourth switch Q4 are NPN type triodes, the collectors of the first switch Q1 and the fourth switch Q4 are connected with one node of the input end of the transformer, and the collectors of the first switch Q1 and the fourth switch Q4 are respectively connected with the other node of the input end of the transformer; the emitters of the first switch Q1 and the second switch Q2 are connected with the power supply module, and the emitters of the third switch Q3 and the fourth switch Q4 are grounded; a third resistor R2 is connected in series between the base of the first switch Q1 and the high potential end of the first transistor Q5, a fourth resistor R8 is connected in series between the base of the second switch Q2 and the high potential end of the third transistor Q7, the base of the third switch Q3 is connected to the low potential end of the second transistor Q6, and the base of the fourth switch Q3 is connected to the low potential end of the fourth transistor Q6.

3. The inverting analog circuit of claim 2, wherein: the inversion module further comprises a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4, wherein the cathode and the anode of the first diode D1 are respectively connected with the emitter and the collector of the first switch Q1; the cathode and the anode of the second diode D2 are respectively connected with the emitter and the collector of the second switch Q2; the cathode and the anode of the third diode D3 are respectively connected with the emitter and the collector of the third switch Q3; the cathode and the anode of the fourth diode D4 are connected to the emitter and the collector of the fourth switch Q4, respectively.

4. The inverting analog circuit of claim 1, wherein: the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8 are all NPN-type triodes, and current-limiting resistors are connected in series between the bases of the first transistor Q5, the second transistor Q6, the third transistor Q7 and the fourth transistor Q8 and the signal input end respectively.

5. The inverting analog circuit of claim 1, wherein: the AC-DC conversion module adopts a full-wave rectification circuit consisting of four diodes.

6. The inverting analog circuit of claim 1, wherein: and an LED load module is connected between the AC-DC conversion module and the transformer.

7. The inverting analog circuit of claim 1, wherein: the signal acquisition module comprises a voltage acquisition module and a current acquisition module, the voltage acquisition module is connected with the current acquisition module in series, and the voltage acquisition module is connected with a first switch S1 in parallel;

the current acquisition module comprises a fifth resistor R11, a sixth resistor R12, a first sliding resistor RP1 and a second switch S2, wherein the output end of the fifth resistor R11 is connected with the input end of a sixth resistor R12, the input end of the fifth resistor R11 is connected with the input end of a first sliding resistor RP1, the output end of the sixth resistor R12 is connected with the output end of a first sliding resistor RP1, the junction of the sixth resistor R12 and the first sliding resistor RP1 is connected with the input end of the voltage acquisition module, and the first sliding resistor RP1 is connected with the second switch S2 in parallel;

the voltage acquisition module comprises a capacitor C7, a controllable precision voltage-stabilizing source D10, a second sliding resistor RP2, a light-emitting diode LED2 and a third switch S3, wherein the capacitor C7, the controllable precision voltage-stabilizing source D10, the light-emitting diode LED2, the second sliding resistor RP2 and the third switch S3 are sequentially connected in parallel, the anode of the controllable precision voltage-stabilizing source D10 is connected with a seventh resistor R13 in series, the cathode of the light-emitting diode LED2 is connected with an eighth resistor R14 in series, the seventh resistor R13 is connected with an eighth resistor R14 in parallel, and the cathode of the controllable precision voltage-stabilizing source D10 and the anode of the light-emitting diode LED2 are both grounded.

8. The inverting analog circuit of claim 7, wherein: the controllable precise voltage-stabilizing source D10 is of TL431 type.

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