CN213279496U - 2000W high-frequency sine wave inverter - Google Patents
2000W high-frequency sine wave inverter Download PDFInfo
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- CN213279496U CN213279496U CN202021742934.XU CN202021742934U CN213279496U CN 213279496 U CN213279496 U CN 213279496U CN 202021742934 U CN202021742934 U CN 202021742934U CN 213279496 U CN213279496 U CN 213279496U
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Abstract
The utility model provides a 2000W high frequency type sine wave inverter, expand a class circuit through setting up two sets of the first current circuit and the second that expand that the structure is the same, two sets of parallelly connected current circuits that expand divide the current of push-pull module output, each group expands a class circuit and includes five switch circuit that the structure is the same, five switch circuit that the structure is the same shunt in parallel, make the load current on each switch circuit diminish, switch circuit's operating temperature reduces, the resistance reduces, the heat that the circuit produced is less, the circuit loss reduces, power conversion efficiency improves; the four groups of push-pull boosting circuits with the same structure are arranged, so that amplified current values are superposed to amplify input PWM pulse signals so as to drive the switching circuit to work, two triodes with opposite polarities are arranged in each group of push-pull boosting circuits, and one triode is always conducted in one period of the PWM pulse signals, so that the power conversion efficiency is improved, and the circuit loss is reduced.
Description
Technical Field
The utility model relates to an inverter technical field especially relates to a 2000W high frequency type sine wave inverter.
Background
With the rise of green renewable energy sources such as photovoltaic power generation and the like, the sine wave inverter is widely applied to various places such as microcomputer systems, communication systems, households, aviation, emergency, communication and industrial equipment and the like which need emergency backup power sources; the high-frequency type adopts a two-stage structure, generally adopts push-pull boosting to obtain a voltage of about 350V of direct current, and the later stage obtains a required alternating voltage after SPWM inversion, so that the cost is low, and the quality of an output waveform is greatly improved.
The booster circuit is a key part of the high-frequency sine wave inverter, and the key indexes of the working stability, safety, response sensitivity and the like of the booster circuit influence the normal operation of the whole inverter power supply system; the DC-DC direct current boost conversion circuit of current 2000W sine wave inverter has the circuit unstability, and the in-process temperature that steps up risees, and it is big to lead to power loss, and the low characteristics of sine wave inverter's conversion rate, consequently, in order to solve above-mentioned problem, the utility model provides a 2000W high frequency type sine wave inverter, the boost conversion circuit of DC-to-ac converter adopts the same push-pull boost circuit of four group structures, and two sets of structures are the same expands a class circuit, and every group expands class circuit and sets up the same switch circuit of five group structures, realizes expanding and flows, can effectively reduce the temperature of power tube, improves sine wave inverter's conversion efficiency.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a 2000W high frequency type sine wave inverter, the boost conversion circuit of dc-to-ac converter adopts the same push-pull boost circuit of four group structures, and two sets of structures are the same expands class circuit, and every group expands class circuit and sets up five groups of structures the same switch circuit, realizes expanding class, can effectively reduce the temperature of power tube, improves sine wave inverter's conversion efficiency.
The technical scheme of the utility model is realized like this: the utility model provides a 2000W high-frequency sine wave inverter, which comprises a CPU chip, a DC power supply, a transformer, a rectifier module, a push-pull module, a first current expansion circuit and a second current expansion circuit, wherein the first current expansion circuit comprises five groups of switch circuits with the same structure;
the output port of PWM1 and the output port of PWM2 of the CPU chip are electrically connected with the input end of the push-pull module respectively, the output end of the push-pull module is electrically connected with the input ends of five groups of switch circuits in the first current spreading circuit and the second current spreading circuit respectively, the output ends of the five groups of switch circuits in the first current spreading circuit are electrically connected with one end of the primary side of the transformer, the output ends of the five groups of switch circuits in the second current spreading circuit are electrically connected with the other end of the primary side of the transformer, the direct-current power supply is electrically connected with the center tap of the transformer, and the two ends of the secondary side of the transformer are electrically connected.
Based on the above technical solution, it is preferable that the dc power supply adopts a dc power supply with an output of 24V.
On the basis of the above technical solution, preferably, the push-pull module includes: the first push-pull booster circuit, the second push-pull booster circuit, the third push-pull booster circuit and the fourth push-pull booster circuit are connected in series;
the input ends of the first push-pull boosting circuit and the second push-pull boosting circuit are respectively electrically connected with a PWM1 output port of the CPU chip, the input ends of the third push-pull boosting circuit and the fourth push-pull boosting circuit are respectively electrically connected with a PWM2 output port of the CPU chip, the output ends of the first push-pull boosting circuit and the second push-pull boosting circuit are respectively electrically connected with the input ends of five groups of switching circuits in the first current spreading circuit, and the output ends of the third push-pull boosting circuit and the fourth push-pull boosting circuit are respectively electrically connected with the input ends of five groups of switching circuits in the second current spreading circuit.
Still further preferably, the switching circuit includes a resistor R12 and a field effect transistor Q14;
the output ends of the first push-pull boosting circuit and the second push-pull boosting circuit are electrically connected with one end of a resistor R12 respectively, the other end of a resistor R12 is electrically connected with the grid electrode of a field-effect tube Q14, the source electrode of the field-effect tube Q14 is grounded, and the drain electrode of the field-effect tube Q14 is electrically connected with one end of the primary side of the transformer.
Still further preferably, the first push-pull boosting circuit comprises resistors R1-R2, a capacitor C100, a PNP transistor Q1 and an NPN transistor Q2;
the output port of the PWM1 of the CPU chip is electrically connected to the bases of the PNP transistor Q1 and the NPN transistor Q2 through a resistor R1, the resistor R2 is connected in parallel between the base and the collector of the PNP transistor Q1, the collector of the PNP transistor Q1 is grounded, the collector of the NPN transistor Q2 is electrically connected to the power supply, the emitter of the NPN transistor Q2 and the emitter of the PNP transistor Q1 are electrically connected to the input terminals of the five sets of switching circuits in the first current spreading circuit, and the capacitor C100 is connected in parallel to the collector of the PNP transistor Q1 and the two ends of the collector of the NPN transistor Q2.
On the basis of the above technical solution, preferably, the rectification module includes a first rectification unit and a second rectification unit;
the two ends of the secondary side of the transformer are respectively and electrically connected with the input end of the first rectifying unit and the input end of the second rectifying unit in a one-to-one correspondence mode, the output end of the first rectifying unit outputs a high-voltage direct current signal, and the output end of the second rectifying unit outputs a 12V or 5V voltage signal.
Still further preferably, the system further comprises a feedback circuit;
the input end of the feedback circuit is electrically connected with the output end of the first rectifying unit, and the output end of the feedback circuit is electrically connected with the feedback input port of the CPU chip.
Still further preferably, the system further comprises a full-bridge inversion module;
the input end of the full-bridge inversion module is electrically connected with the output end of the first rectification unit, and the output end of the full-bridge inversion module outputs a high-frequency alternating-current voltage signal.
The utility model discloses a 2000W high frequency type sine wave inverter has following beneficial effect for prior art:
(1) by arranging four groups of first push-pull boosting circuits, second push-pull boosting circuits, third push-pull boosting circuits and fourth push-pull boosting circuits which are identical in structure, the first push-pull boosting circuit and the second push-pull boosting circuit are used for amplifying PWM1 square wave pulse signals output by a PWM1 output port of a CPU chip, the third push-pull boosting circuit and the fourth push-pull boosting circuit are used for amplifying PWM2 square wave pulse signals output by a PWM2 output port of the CPU chip, the current value obtained by parallel superposition of the first push-pull boosting circuit and the second push-pull boosting circuit is superposed with the current value obtained by parallel superposition of the third push-pull boosting circuit and the fourth push-pull boosting circuit, the input PWM pulse signals are amplified to drive the switching circuits to work, two triodes with opposite polarities are arranged in each group of push-pull boosting circuits, and one triode is always conducted in one period of the PWM pulse signals, the power conversion efficiency is improved, and the circuit loss is reduced;
(2) through setting up two sets of first circuits and the second circuit that expands that the structure is the same, two sets of parallelly connected circuits that expand shunts the electric current of push-pull module output, each group expands the circuit and includes five switch circuits that the structure is the same, five parallelly connected shunts of switch circuit that the structure is the same, make the load current on every switch circuit diminish, switch circuit's operating temperature reduces, the resistance reduces, the heat that the circuit produced is less, the circuit loss reduces, power conversion efficiency improves.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a system structure diagram of a 2000W high-frequency sine wave inverter according to the present invention;
fig. 2 is a circuit diagram of a first push-pull boost circuit in a 2000W high-frequency type sine wave inverter according to the present invention;
fig. 3 is a circuit diagram of a switching circuit in a 2000W high-frequency sine wave inverter according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
As shown in fig. 1, the utility model discloses a 2000W high frequency type sine wave inverter includes CPU chip, dc power supply, transformer, feedback circuit, full-bridge contravariant module, rectifier module, push-pull module, first current circuit and the second current circuit that expands.
And the CPU chip is used for providing a PWM square wave pulse signal for the push-pull module, detecting and judging a high-voltage direct current signal output by the rectification module fed back by the feedback circuit, and when the high-voltage direct current signal output by the rectification module fed back by the feedback circuit is greater than or less than a set threshold value, enabling the high-voltage direct current signal output by the rectification module to be equal to the set threshold value by adjusting the frequency and the duty ratio of the output PWM square wave pulse signal. The feedback input port of the CPU chip is electrically connected with the output end of the feedback circuit, and the PWM output port of the CPU chip is electrically connected with the input end of the push-pull module. Preferably, in this embodiment, the CPU chip is an SA8281 chip.
The direct current power supply is used for supplying power to the transformer and providing a 24V direct current power supply; the direct current power supply is electrically connected with a center tap of the transformer; preferably, in this embodiment, the dc power supply is a storage battery.
The push-pull module is used for amplifying the PWM square wave pulse signal output by the CPU chip; the input end of the push-pull module is electrically connected with the PWM1 output port and the PWM2 output port of the CPU chip respectively, and the output end of the push-pull module is electrically connected with the input ends of the first current spreading circuit and the second current spreading circuit respectively. Preferably, in this embodiment, the push-pull module includes a first push-pull boost circuit, a second push-pull boost circuit, a third push-pull boost circuit, and a fourth push-pull boost circuit; the first push-pull boosting circuit and the second push-pull boosting circuit are used for amplifying PWM1 square wave pulse signals output by a PWM1 output port of the CPU chip, the third push-pull boosting circuit and the fourth push-pull boosting circuit are used for amplifying PWM2 square wave pulse signals output by a PWM2 output port of the CPU chip, the current value superposed by the first push-pull boosting circuit and the second push-pull boosting circuit in parallel is superposed with the current value superposed by the third push-pull boosting circuit and the fourth push-pull boosting circuit in parallel, the PWM square wave pulse signals are further amplified, and triodes are always conducted in one period of the PWM pulse signals, so that the power conversion efficiency is improved, and the circuit loss is reduced. The input ends of the first push-pull boosting circuit and the second push-pull boosting circuit are respectively electrically connected with a PWM1 output port of the CPU chip, the input ends of the third push-pull boosting circuit and the fourth push-pull boosting circuit are respectively electrically connected with a PWM2 output port of the CPU chip, the output ends of the first push-pull boosting circuit and the second push-pull boosting circuit are respectively electrically connected with the input end of the first current spreading circuit, and the output ends of the third push-pull boosting circuit and the fourth push-pull boosting circuit are respectively electrically connected with the input end of the second current spreading circuit.
Since the first push-pull boost circuit, the second push-pull boost circuit, the third push-pull boost circuit and the fourth push-pull boost circuit have the same structure, only the first push-pull boost circuit will be described here. As shown in fig. 2, the first push-pull boost circuit includes resistors R1-R2, a capacitor C100, a PNP transistor Q1, and an NPN transistor Q2; the output port of the PWM1 of the CPU chip is electrically connected to the base of the PNP transistor Q1 and the base of the NPN transistor Q2 through a resistor R1, the resistor R2 is connected in parallel between the base and the collector of the PNP transistor Q1, the collector of the PNP transistor Q1 is grounded, the collector of the NPN transistor Q2 is electrically connected to the power supply, the emitter of the NPN transistor Q2 and the emitter of the PNP transistor Q1 are electrically connected to the input terminal of the first current spreading circuit, and a capacitor C100 is connected in parallel to the collector of the PNP transistor Q1 and the two ends of the collector of the NPN transistor Q2.
The working principle of the first push-pull boosting circuit is as follows: when a PWM pulse signal output by a PWM1 output port of the CPU chip is in a low level, a PNP type triode Q1 is conducted, an NPN type triode Q2 is cut off, the base input current of the PNP type triode Q1 is larger than zero and smaller than a saturation current, and a collector of the PNP type triode Q1 outputs a large current V1, so that the input PWM signal is amplified; when a PWM pulse signal output by a PWM1 output port of the CPU chip is in a high level, an NPN type triode Q2 is conducted, a PNP type triode Q1 is cut off, the base input current of the NPN type triode Q2 is larger than zero and smaller than a saturation current, and a collector of the NPN type triode Q2 outputs a large current V1, so that the input PWM signal is amplified; the capacitor C100 is used for filtering high-frequency harmonics in circuit current, the resistor R1 is a load resistor, the protection circuit is not broken down by short circuit, and the resistor R2 is a protection resistor and used for avoiding the error conduction of the triode when the micro current flows into the base electrode of the triode and preventing the circuit from being burnt out by penetrating current between the collector and the emitter. In fig. 3, V2 represents a large current signal output by the third push-pull boosting circuit and the fourth push-pull boosting circuit.
The two groups of parallel current-spreading circuits shunt current output by the push-pull module; the first current-expanding circuit comprises five groups of switch circuits with the same structure, the five groups of switch circuits with the same structure are connected in parallel and shunted, so that the load current on each switch circuit is reduced, the working temperature of the switch circuits is reduced, the resistance value of the resistor is reduced, the heat generated by the circuit is smaller, the circuit loss is reduced, and the power conversion efficiency is improved. The output ends of the first push-pull boosting circuit and the second push-pull boosting circuit are electrically connected with the input ends of the five groups of switching circuits in the first current expanding circuit, the output ends of the third push-pull boosting circuit and the fourth push-pull boosting circuit are electrically connected with the input ends of the five groups of switching circuits in the second current expanding circuit, the output ends of the five groups of switching circuits in the first current expanding circuit are electrically connected with one end of the primary side of the transformer, and the output ends of the five groups of switching circuits in the second current expanding circuit are electrically connected with the other end of the primary side of the transformer.
Since the switching circuit of the first current spreading circuit and the switching circuit of the second current spreading circuit have the same structure, only the switching circuit of the first current spreading circuit will be described herein; preferably, in this embodiment, as shown in fig. 3, the switch circuit includes a resistor R12 and a field-effect transistor Q14; the output ends of the first push-pull boosting circuit and the second push-pull boosting circuit are electrically connected with one end of a resistor R12 respectively, the other end of a resistor R12 is electrically connected with the grid electrode of a field-effect tube Q14, the source electrode of the field-effect tube Q14 is grounded, and the drain electrode of the field-effect tube Q14 is electrically connected with one end of the primary side of the transformer. The working principle of the switching circuit is as follows: five groups of switch circuits with the same structure are connected in parallel and shunted, the load current on each switch circuit is small, the working temperature of the switch circuit is reduced, the resistance value of the resistor is reduced, the heat generated by the circuit is small, the circuit loss is reduced, and the power conversion efficiency is improved; the resistor R12 is a protective resistor to prevent static electricity from damaging the FET.
The transformer is matched with the first push-pull boosting circuit, the second push-pull boosting circuit, the third push-pull boosting circuit, the fourth push-pull boosting circuit, the first current amplifying circuit and the second current amplifying circuit, converts a direct-current voltage signal input by a direct-current power supply into an alternating-current voltage signal, and amplifies the voltage value of the alternating-current voltage signal; one end of the primary side of the transformer is electrically connected with the output ends of the five groups of switch circuits in the first current spreading circuit, the other end of the primary side of the transformer is electrically connected with the output ends of the five groups of switch circuits in the second current spreading circuit, and two ends of the secondary side of the transformer are electrically connected with the rectifier module. Preferably, in this embodiment, the transformer is a single-phase transformer.
The rectifier module is used for converting alternating current signals output by the transformer into direct current signals, and the input end of the rectifier module is electrically connected with two ends of the secondary side of the transformer; preferably, in this embodiment, the rectifying module includes a first rectifying unit and a second rectifying unit; two ends of the secondary side of the transformer are respectively and electrically connected with the input end of the first rectifying unit and the input end of the second rectifying unit in a one-to-one correspondence mode, the output end of the first rectifying unit outputs a 430V high-voltage direct current signal, and the output end of the second rectifying unit outputs a 12V or 5V voltage signal. The present embodiment does not involve the improvement of the circuits of the first rectifying unit and the second rectifying unit, and therefore, the circuit structures of the first rectifying unit and the second rectifying unit are not described again here.
The feedback circuit is used for feeding back the high-voltage direct-current signal output by the first rectifying unit to the CPU chip; the input end of the feedback circuit is electrically connected with the output end of the first rectifying unit, and the output end of the feedback circuit is electrically connected with the feedback input port of the CPU chip. The present embodiment does not involve an improvement of the feedback circuit structure, and therefore, the circuit structure of the feedback circuit is not described again here.
The full-bridge inversion module is controlled by an SPWM1-SPWM4 signal output by the CPU chip and inverts a 430V high-voltage direct current signal output by the first rectification unit into a 2000w alternating current signal; the input end of the full-bridge inversion module is electrically connected with the output end of the first rectification unit, and the output end of the full-bridge inversion module outputs 2000W of alternating voltage signals.
The utility model discloses a theory of operation is: a PWM1 output port of the CPU chip outputs a PWM1 square wave signal to the first push-pull boosting circuit and the second push-pull boosting circuit, and a PWM2 output port outputs a PWM2 square wave signal to the third push-pull boosting circuit and the fourth push-pull boosting circuit; the first push-pull boosting circuit and the second push-pull boosting circuit are used for amplifying PWM1 square wave pulse signals output by a PWM1 output port of the CPU chip, the third push-pull boosting circuit and the fourth push-pull boosting circuit are used for amplifying PWM2 square wave pulse signals output by a PWM2 output port of the CPU chip, and the current value obtained by parallel superposition of the first push-pull boosting circuit and the second push-pull boosting circuit is superposed with the current value obtained by parallel superposition of the third push-pull boosting circuit and the fourth push-pull boosting circuit to realize amplification of the input PWM pulse signals; the amplified current is input into two groups of first current amplifying circuits and second current amplifying circuits with the same structure to drive the switch circuits to work, five groups of switch circuits with the same structure in the first current amplifying circuits and the second current amplifying circuits are connected in parallel and shunted, the current after current amplifying is input into two ends of the primary side of the transformer, meanwhile, a direct current power supply provides 24V direct current for the transformer, the transformer generates electromagnetic induction and converts the received direct current into a high-power alternating current signal, the alternating current signal is input into the first rectifying unit and the second rectifying unit through two ends of the secondary side of the transformer to be rectified, the first rectifying unit outputs a stable 430V high-voltage direct current signal after rectification, the second rectifying unit outputs a stable 12V direct current signal or a stable 5V direct current signal after rectification, the full-bridge inversion module is controlled by an SPWM1-SPWM4 signal output by the CPU chip and inverts the high-voltage direct current signal output by the rectifying module into a 2000w alternating current signal.
The beneficial effect of this embodiment does: the power conversion circuit is characterized in that four groups of first push-pull boosting circuits, second push-pull boosting circuits, third push-pull boosting circuits and fourth push-pull boosting circuits which are identical in structure are arranged, the first push-pull boosting circuits and the second push-pull boosting circuits are used for amplifying PWM1 square wave pulse signals output by a PWM1 output port of a CPU chip, the third push-pull boosting circuits and the fourth push-pull boosting circuits are used for amplifying PWM2 square wave pulse signals output by a PWM2 output port of the CPU chip, current values superposed by the first push-pull boosting circuits and the second push-pull boosting circuits in parallel are superposed with current values superposed by the third push-pull boosting circuits and the fourth push-pull boosting circuits in parallel, the input PWM pulse signals are amplified to drive the switching circuits to work, two triodes with opposite polarities are arranged in each group of push-pull boosting circuits, one triode is always conducted in one period of the push-pull pulse signals, and, circuit loss is reduced;
through setting up two sets of first circuits and the second circuit that expands that the structure is the same, two sets of parallelly connected circuits that expand shunts the electric current of push-pull module output, each group expands the circuit and includes five switch circuits that the structure is the same, five parallelly connected shunts of switch circuit that the structure is the same, make the load current on every switch circuit diminish, switch circuit's operating temperature reduces, the resistance reduces, the heat that the circuit produced is less, the circuit loss reduces, power conversion efficiency improves.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a 2000W high frequency type sine wave inverter, its includes CPU chip, DC power supply, transformer, rectifier module and push-pull module to and two sets of first current amplifying circuit and the second current amplifying circuit that the structure is the same, its characterized in that: the first current spreading circuit comprises five groups of switch circuits with the same structure;
the output port of the PWM1 and the output port of the PWM2 of the CPU chip are respectively and electrically connected with the input end of the push-pull module, the output end of the push-pull module is respectively and electrically connected with the input ends of five groups of switch circuits in the first current spreading circuit and the second current spreading circuit, the output ends of the five groups of switch circuits in the first current spreading circuit are all electrically connected with one end of the primary side of the transformer, the output ends of the five groups of switch circuits in the second current spreading circuit are all electrically connected with the other end of the primary side of the transformer, the direct-current power supply is electrically connected with a center tap of the transformer, and the two ends of the secondary side of.
2. A 2000W high frequency type sine wave inverter as claimed in claim 1, wherein: the direct current power supply adopts a direct current power supply with the output of 24V.
3. A 2000W high frequency type sine wave inverter as claimed in claim 1, wherein: the push-pull module includes: the first push-pull booster circuit, the second push-pull booster circuit, the third push-pull booster circuit and the fourth push-pull booster circuit are connected in series;
the input ends of the first push-pull boosting circuit and the second push-pull boosting circuit are respectively electrically connected with a PWM1 output port of the CPU chip, the input ends of the third push-pull boosting circuit and the fourth push-pull boosting circuit are respectively electrically connected with a PWM2 output port of the CPU chip, the output ends of the first push-pull boosting circuit and the second push-pull boosting circuit are respectively electrically connected with the input ends of five groups of switching circuits in the first current spreading circuit, and the output ends of the third push-pull boosting circuit and the fourth push-pull boosting circuit are respectively electrically connected with the input ends of five groups of switching circuits in the second current spreading circuit.
4. A 2000W high frequency type sine wave inverter as claimed in claim 3, wherein: the switch circuit comprises a resistor R12 and a field effect transistor Q14;
the output ends of the first push-pull boosting circuit and the second push-pull boosting circuit are electrically connected with one end of a resistor R12 respectively, the other end of a resistor R12 is electrically connected with the grid electrode of a field-effect tube Q14, the source electrode of the field-effect tube Q14 is grounded, and the drain electrode of the field-effect tube Q14 is electrically connected with one end of the primary side of the transformer.
5. A 2000W high frequency type sine wave inverter as claimed in claim 3, wherein: the first push-pull boosting circuit comprises resistors R1-R2, a capacitor C100, a PNP type triode Q1 and an NPN type triode Q2;
the output port of the PWM1 of the CPU chip is electrically connected to the bases of the PNP triode Q1 and the NPN triode Q2 through a resistor R1, the resistor R2 is connected in parallel between the base and the collector of the PNP triode Q1, the collector of the PNP triode Q1 is grounded, the collector of the NPN triode Q2 is electrically connected to the power supply, the emitter of the NPN triode Q2 and the emitter of the PNP triode Q1 are electrically connected to the input terminals of the five sets of switching circuits in the first current spreading circuit, and a capacitor C100 is connected in parallel to the collector of the PNP triode Q1 and the two ends of the collector of the NPN triode Q2.
6. A 2000W high frequency type sine wave inverter as claimed in claim 1, wherein: the rectifying module comprises a first rectifying unit and a second rectifying unit;
the two ends of the secondary side of the transformer are respectively electrically connected with the input end of the first rectifying unit and the input end of the second rectifying unit in a one-to-one correspondence mode, the output end of the first rectifying unit outputs a high-voltage direct current signal, and the output end of the second rectifying unit outputs a 12V or 5V voltage signal.
7. The 2000W high frequency sine wave inverter of claim 6, wherein: also includes a feedback circuit;
the input end of the feedback circuit is electrically connected with the output end of the first rectifying unit, and the output end of the feedback circuit is electrically connected with the feedback input port of the CPU chip.
8. The 2000W high frequency sine wave inverter of claim 6, wherein: the system also comprises a full-bridge inversion module;
the input end of the full-bridge inversion module is electrically connected with the output end of the first rectification unit, and the output end of the full-bridge inversion module outputs a high-frequency alternating-current voltage signal.
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| GR01 | Patent grant | ||
| GR01 | Patent grant |