CN204928594U - Miniature sinewave output 400Hz converter module - Google Patents
Miniature sinewave output 400Hz converter module Download PDFInfo
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- CN204928594U CN204928594U CN201520739249.4U CN201520739249U CN204928594U CN 204928594 U CN204928594 U CN 204928594U CN 201520739249 U CN201520739249 U CN 201520739249U CN 204928594 U CN204928594 U CN 204928594U
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Abstract
The utility model discloses a miniature sinewave output 400Hz converter module, including 24V DC power supply, direct current filtering, auxiliary electrical power source, frequency conversion control and frequency conversion output circuit, exchange the AC input and be the direct current through 24V DC power supply circuit switching, again through the 24V direct current that direct current filter outlet is stable, for auxiliary electrical power source and the power supply of frequency conversion output circuit, supply power frequency conversion control circuit control frequency conversion output circuit formation 400Hz sinewave output VO for the frequency conversion control circuit through the auxiliary electrical power source circuit to from frequency conversion output circuit sampling the carrying on closed -loop control of system, the utility model discloses it adopts SMT technology, has small, light in weight, efficient, characteristics that the noise is low, and its total harmonic distortion value THD is not more than 0.02%.
Description
Technical field
The utility model relates to a kind of device for converting electric energy, specifically, relates to a kind of miniature sinewave output 400Hz frequency converter module.
Background technology
At present, small-sized sinewave output frequency converter module adopts two kinds of circuit-modes usually: one is linear circuit pattern, linear power amplifier (comprising category-A, category-B, AB class etc.) is adopted to export as exchanging, the sinusoidal waveform exported under this pattern is pure, almost no-output noise jamming, THD(total harmonic distortion) be close to zero, but its maximum shortcoming is that conversion efficiency is lower, generally only have about 45% ~ 60%, this causes its volume and weight all comparatively large, limits the application of this kind of circuit-mode frequency converter module in many instances; Another kind is mode switching circuit, adopt SPWM waveform modulated technology more popular at present, H-bridge circuit topological structure, its conversion efficiency is higher, generally more than 80%, and volume and weight comparatively linear circuit pattern all significantly reduce, but, there is larger electromagnetic interference, need more filtering measures in its circuit structure and drived control relative complex, THD is the highest can only be accomplished between 0.5% ~ 3%, cannot use in the higher equipment of some offset of sinusoidal waveform requirements or system.
Utility model content
The one that the utility model designs to solve the problems of the technologies described above just miniature sinewave output 400Hz frequency converter module.
The utility model solves the technical scheme that its technical problem adopts:
A kind of miniature sinewave output 400Hz frequency converter module, comprises ± 24V DC power supply, DC filtering, accessory power supply, variable frequency control and frequency conversion output circuit, exchange AC input warp ± 24V DC power supply circuit and be converted to direct current, again through DC filtering circuit stable output ± 24V direct current, for accessory power supply and frequency conversion output circuit are powered, be that frequency conversion control circuit is powered through auxiliary power circuit, frequency conversion control circuit controls frequency conversion output circuit and generates 400Hz sinewave output VO, and carries out system closed-loop control from the sampling of frequency conversion output circuit, DC filtering circuit is by inductance L 1 and electric capacity C1, C3, inductance L 2 and electric capacity C2, C4 form LC filter respectively, right ± 24V input is carried out filtering and is formed pure positive-negative power VCC and VEE, diode D1, D2 be serially connected in ± 24V direct current between play polarity protection effect, auxiliary power circuit is made up of chip U1, U2, U3 and filter capacitor, positive-negative power VCC and VEE is that U1 and U2 powers, U1 is negative pressure three terminal regulator, U2 is malleation three terminal regulator, both export be combined into ± DC12V voltage is that the U5 of frequency conversion control circuit and frequency conversion output circuit are powered, U2 powers for U3 simultaneously, and U3 is malleation three terminal regulator, its DC5V voltage exported is that the frequency divider U4 of frequency conversion control circuit powers, and electric capacity C5 ~ C9 is filter capacitor, frequency conversion control circuit is by chip U4, U5 and U6 and peripheral component composition thereof, wherein U6 is quartz oscillator, U6 is connected across between 10 and 11 pin of U4, produce the square-wave signal of frequency-adjustable, this square-wave signal is exported by 2 pin of U4, PID adjuster is given after resistance R2, PID adjuster is by resistance R3, R4, R5, R6, electric capacity C12, the A1 module composition of C13 and chip U5, its effect is that square-wave signal is converted to 400Hz sine wave signal, after the A2 module of reverse proportional amplifier chip U5, sine wave output signal SG is to frequency conversion output circuit, the output VF be connected with sinewave output VO delivers to the A3 module of chip U5 after potentiometer R8 and resistance R9 dividing potential drop, the output of A3 is connected to resistance R2 through resistance R7, thus form loop pressure-stabilizing system, frequency conversion output circuit is D class audio frequency amplifying circuit, chip U7 is D audio frequency amplifier main control chip IRS2092, sine wave signal SG delivers to its 3 pin, after its inner triangle wave computing produced, generate the width square wave that becomes sinusoidal wave rule to change, this modulating wave exports to the grid of MOSFET pipe Q1 and Q2 respectively through the two-way of anti-phase generation polar-symmetric through 14 pin of U7 and 11 pin, VCC and Q1 drain electrode is connected, and VEE and Q2 source electrode is connected, and the source electrode of Q1, the drain electrode of Q2 are connected as exporting with 13 pin of U7, and the LC demodulator via L3 and C24 composition exports pure sinewave output VO, sinewave output VO is connected to 3 pin of U7 through resistance R18 and R17 of series connection, and electric capacity C22 is connected across resistance R18 and between R17 tie point and ground, form the closed loop feedback network of U7.
Described one miniature sinewave output 400Hz frequency converter module, its Q1 and Q2 is two the MOSFET pipes integrated, and its model is IRF4212, and be the special power amplifier MOSFET of D audio frequency amplifier, both form semibridge system topological structure.
Described one miniature sinewave output 400Hz frequency converter module, chip U1 is negative pressure three terminal regulator LM7912, chip U2 be malleation three terminal regulator LM7812, chip U3 is malleation three terminal regulator LM7805.
The utility model is high-quality sine wave output shape under having linear circuit pattern concurrently, conversion efficiency higher under having again mode switching circuit, and whole module all adopts SMT technique except exchanging the power amplifying part of output, and volume is little, lightweight.The utility model has the following advantages compared with traditional small-sized sinewave output frequency converter:
1, volume is little, and volume is 1/5 of equal-wattage grade frequency converter.
2, lightweight, weight is 1/5 of equal-wattage grade frequency converter
3, efficiency is high, and fully loaded conversion efficiency is not less than 90%
4, extremely low THD value, THD is not more than 0.02%.
5, low noise, output noise is not more than 0.5Vrms.
6, module adopts SMT technique, is easy to quality control and batch production.
The beneficial effects of the utility model are that it adopts SMT technique, and volume is little, lightweight, efficiency is high, noise is low, and its total harmonic distortion value THD is not more than 0.02%.
Accompanying drawing explanation
Fig. 1 is the utility model schematic block circuit diagram.
Fig. 2 is the utility model DC filtering circuit theory diagrams.
Fig. 3 is the utility model auxiliary power circuit schematic diagram.
Fig. 4 is the utility model frequency conversion control circuit schematic diagram.
Fig. 5 is the utility model frequency conversion output circuit schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
As shown in Fig. 1 to 5, a kind of miniature sinewave output 400Hz frequency converter module of the utility model, comprises ± 24V DC power supply, DC filtering, accessory power supply, variable frequency control and frequency conversion output circuit, exchange AC input warp ± 24V DC power supply circuit and be converted to direct current, again through DC filtering circuit stable output ± 24V direct current, for accessory power supply and frequency conversion output circuit are powered, be that frequency conversion control circuit is powered through auxiliary power circuit, frequency conversion control circuit controls frequency conversion output circuit and generates 400Hz sinewave output VO, and carries out system closed-loop control from the sampling of frequency conversion output circuit, DC filtering circuit is by inductance L 1 and electric capacity C1, C3, inductance L 2 and electric capacity C2, C4 form LC filter respectively, right ± 24V input is carried out filtering and is formed pure positive-negative power VCC and VEE, diode D1, D2 be serially connected in ± 24V direct current between play polarity protection effect, auxiliary power circuit is made up of chip U1, U2, U3 and filter capacitor, positive-negative power VCC and VEE is that U1 and U2 powers, U1 is negative pressure three terminal regulator, U2 is malleation three terminal regulator, both export be combined into ± DC12V voltage is that the U5 of frequency conversion control circuit and frequency conversion output circuit are powered, U2 powers for U3 simultaneously, and U3 is malleation three terminal regulator, its DC5V voltage exported is that the frequency divider U4 of frequency conversion control circuit powers, and electric capacity C5 ~ C9 is filter capacitor, frequency conversion control circuit is by chip U4, U5 and U6 and peripheral component composition thereof, wherein U6 is quartz oscillator, U6 is connected across between 10 and 11 pin of U4, produce the square-wave signal of frequency-adjustable, this square-wave signal is exported by 2 pin of U4, PID adjuster is given after resistance R2, PID adjuster is by resistance R3, R4, R5, R6, electric capacity C12, the A1 module composition of C13 and chip U5, its effect is that square-wave signal is converted to 400Hz sine wave signal, after the A2 module of reverse proportional amplifier chip U5, sine wave output signal SG is to frequency conversion output circuit, the output VF be connected with sinewave output VO delivers to the A3 module of chip U5 after potentiometer R8 and resistance R9 dividing potential drop, the output of A3 is connected to resistance R2 through resistance R7, thus form loop pressure-stabilizing system, frequency conversion output circuit is D class audio frequency amplifying circuit, chip U7 is D audio frequency amplifier main control chip IRS2092, sine wave signal SG delivers to its 3 pin, after its inner triangle wave computing produced, generate the width square wave that becomes sinusoidal wave rule to change, this modulating wave exports to the grid of MOSFET pipe Q1 and Q2 respectively through the two-way of anti-phase generation polar-symmetric through 14 pin of U7 and 11 pin, VCC and Q1 drain electrode is connected, and VEE and Q2 source electrode is connected, and the source electrode of Q1, the drain electrode of Q2 are connected as exporting with 13 pin of U7, and the LC demodulator via L3 and C24 composition exports pure sinewave output VO, sinewave output VO is connected to 3 pin of U7 through resistance R18 and R17 of series connection, and electric capacity C22 is connected across resistance R18 and between R17 tie point and ground, the closed loop feedback network of composition U7, become two close cycles with the loop pressure-stabilizing system in combination of frequency conversion control circuit, guarantee the stability of module dynamical system further.
Described one miniature sinewave output 400Hz frequency converter module, its Q1 and Q2 is two the MOSFET pipes integrated, and its model is IRF4212, and be the special power amplifier MOSFET of D audio frequency amplifier, both form semibridge system topological structure.
Described one miniature sinewave output 400Hz frequency converter module, chip U1 is negative pressure three terminal regulator LM7912, chip U2 be malleation three terminal regulator LM7812, chip U3 is malleation three terminal regulator LM7805.
The utility model is not limited to above-mentioned preferred forms, anyone other any or akin products identical with the utility model drawn under enlightenment of the present utility model, all drops within protection range of the present utility model.
Claims (3)
1. a miniature sinewave output 400Hz frequency converter module, comprises ± 24V DC power supply, DC filtering, accessory power supply, variable frequency control and frequency conversion output circuit, it is characterized in that: exchange AC input warp ± 24V DC power supply circuit and be converted to direct current, again through DC filtering circuit stable output ± 24V direct current, for accessory power supply and frequency conversion output circuit are powered, be that frequency conversion control circuit is powered through auxiliary power circuit, frequency conversion control circuit controls frequency conversion output circuit and generates 400Hz sinewave output VO, and carries out system closed-loop control from the sampling of frequency conversion output circuit, DC filtering circuit is by inductance L 1 and electric capacity C1, C3, inductance L 2 and electric capacity C2, C4 form LC filter respectively, right ± 24V input is carried out filtering and is formed pure positive-negative power VCC and VEE, diode D1, D2 be serially connected in ± 24V direct current between play polarity protection effect, auxiliary power circuit is made up of chip U1, U2, U3 and filter capacitor, positive-negative power VCC and VEE is that U1 and U2 powers, U1 is negative pressure three terminal regulator, U2 is malleation three terminal regulator, both export be combined into ± DC12V voltage is that the U5 of frequency conversion control circuit and frequency conversion output circuit are powered, U2 powers for U3 simultaneously, and U3 is malleation three terminal regulator, its DC5V voltage exported is that the frequency divider U4 of frequency conversion control circuit powers, and electric capacity C5 ~ C9 is filter capacitor, frequency conversion control circuit is by chip U4, U5 and U6 and peripheral component composition thereof, wherein U6 is quartz oscillator, U6 is connected across between 10 and 11 pin of U4, produce the square-wave signal of frequency-adjustable, this square-wave signal is exported by 2 pin of U4, PID adjuster is given after resistance R2, PID adjuster is by resistance R3, R4, R5, R6, electric capacity C12, the A1 module composition of C13 and chip U5, its effect is that square-wave signal is converted to 400Hz sine wave signal, after the A2 module of reverse proportional amplifier chip U5, sine wave output signal SG is to frequency conversion output circuit, the output VF be connected with sinewave output VO delivers to the A3 module of chip U5 after potentiometer R8 and resistance R9 dividing potential drop, the output of A3 is connected to resistance R2 through resistance R7, thus form loop pressure-stabilizing system, frequency conversion output circuit is D class audio frequency amplifying circuit, chip U7 is D audio frequency amplifier main control chip IRS2092, sine wave signal SG delivers to its 3 pin, after its inner triangle wave computing produced, generate the width square wave that becomes sinusoidal wave rule to change, this modulating wave exports to the grid of MOSFET pipe Q1 and Q2 respectively through the two-way of anti-phase generation polar-symmetric through 14 pin of U7 and 11 pin, VCC and Q1 drain electrode is connected, and VEE and Q2 source electrode is connected, and the source electrode of Q1, the drain electrode of Q2 are connected as exporting with 13 pin of U7, and the LC demodulator via L3 and C24 composition exports pure sinewave output VO, sinewave output VO is connected to 3 pin of U7 through resistance R18 and R17 of series connection, and electric capacity C22 is connected across resistance R18 and between R17 tie point and ground, form the closed loop feedback network of U7.
2. one according to claim 1 miniature sinewave output 400Hz frequency converter module, it is characterized in that: Q1 and Q2 is two the MOSFET pipes integrated, its model is IRF4212, and be the special power amplifier MOSFET of D audio frequency amplifier, both form semibridge system topological structure.
3. one according to claim 1 miniature sinewave output 400Hz frequency converter module, is characterized in that: chip U1 is negative pressure three terminal regulator LM7912, chip U2 be malleation three terminal regulator LM7812, chip U3 is malleation three terminal regulator LM7805.
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| CN201520739249.4U CN204928594U (en) | 2015-09-23 | 2015-09-23 | Miniature sinewave output 400Hz converter module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106941647A (en) * | 2017-04-24 | 2017-07-11 | 孟易鸿 | A kind of servo circuit of superaudio sine wave electronic pipe amplifier filament |
| CN107482925A (en) * | 2017-08-28 | 2017-12-15 | 广西电网有限责任公司电力科学研究院 | A kind of frequency-conversion constant-current source follower circuit |
| CN114567198A (en) * | 2022-02-22 | 2022-05-31 | 陕西省电子技术研究所有限公司 | Single-phase pure sine inverter power supply based on D-type power amplifier |
| CN117578901A (en) * | 2024-01-17 | 2024-02-20 | 陕西中科天地航空模块有限公司 | Anti-interference on-board DC-AC voltage and frequency adjustable generating device |
-
2015
- 2015-09-23 CN CN201520739249.4U patent/CN204928594U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106941647A (en) * | 2017-04-24 | 2017-07-11 | 孟易鸿 | A kind of servo circuit of superaudio sine wave electronic pipe amplifier filament |
| CN107482925A (en) * | 2017-08-28 | 2017-12-15 | 广西电网有限责任公司电力科学研究院 | A kind of frequency-conversion constant-current source follower circuit |
| CN107482925B (en) * | 2017-08-28 | 2019-11-22 | 广西电网有限责任公司电力科学研究院 | A kind of frequency-conversion constant-current source follower circuit |
| CN114567198A (en) * | 2022-02-22 | 2022-05-31 | 陕西省电子技术研究所有限公司 | Single-phase pure sine inverter power supply based on D-type power amplifier |
| CN117578901A (en) * | 2024-01-17 | 2024-02-20 | 陕西中科天地航空模块有限公司 | Anti-interference on-board DC-AC voltage and frequency adjustable generating device |
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