CN209963971U - Vehicle-mounted dual-purpose inverter - Google Patents
Vehicle-mounted dual-purpose inverter Download PDFInfo
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- CN209963971U CN209963971U CN201921143562.6U CN201921143562U CN209963971U CN 209963971 U CN209963971 U CN 209963971U CN 201921143562 U CN201921143562 U CN 201921143562U CN 209963971 U CN209963971 U CN 209963971U
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- 239000003990 capacitor Substances 0.000 claims description 29
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a vehicle-mounted dual-purpose inverter. The inverter comprises a push-pull circuit, a transformer, a voltage doubling rectifying circuit and a DC-to-AC circuit, and is structurally characterized by further comprising a comparison circuit and a control circuit, wherein the input end of the comparison circuit is connected with the power supply input end of the inverter, the output end of the comparison circuit is connected with the input end of the control circuit, and the control signal output end of the control circuit is connected with the control signal input end of the voltage doubling rectifying circuit; the input end of the voltage doubling rectifying circuit is connected with two ends of a secondary winding of the transformer, and the output end of the voltage doubling rectifying circuit is connected with the DC-to-AC circuit. The utility model discloses need not to increase the winding at the transformer secondary and can realize two kinds of voltage direct current inputs of 12V 24V.
Description
Technical Field
The utility model relates to a vehicle-mounted inverter, especially a vehicle-mounted dual-purpose inverter.
Background
The vehicle-mounted inverter is a device for converting direct current of an automobile into alternating current, and alternating current electric appliances can be used on the automobile by utilizing the vehicle-mounted inverter.
Automobiles can be largely classified into cars and vans according to their type, the batteries of cars being generally 12V dc batteries, and the batteries of vans being generally 24V dc batteries. The common 12V/24V input dual-purpose vehicle-mounted inverter on the market at present has the working principle that a winding is additionally arranged on the secondary side of a transformer, a detection circuit samples the voltage of a storage battery at an input end, and a driving relay is connected with the secondary winding of the transformer corresponding to 12/24V through a detection comparison circuit to achieve the purpose of outputting the same voltage through direct current. The inverter has the disadvantages that a winding needs to be added on the secondary side of the transformer, so that the winding process of the transformer is complex, the cost is increased, and the miniaturization of a product is inconvenient.
Disclosure of Invention
The utility model aims to solve the technical problem that a need not to increase the on-vehicle dual-purpose inverter that can realize two kinds of voltage direct current inputs of +12V/+24V at the transformer secondary.
The utility model provides a technical scheme that above-mentioned problem adopted is: the inverter comprises a PWM generating circuit, a push-pull circuit, a transformer, a voltage doubling rectifying circuit and a DC-to-AC circuit, and is structurally characterized by also comprising a comparison circuit and a control circuit, wherein the input end of the comparison circuit is connected with the power supply input end of the inverter, the output end of the comparison circuit is connected with the input end of the control circuit, and the control signal output end of the control circuit is connected with the control signal input end of the voltage doubling rectifying circuit; the input end of the voltage doubling rectifying circuit is connected with two ends of a secondary winding of the transformer, and the output end of the voltage doubling rectifying circuit is connected with the DC-to-AC circuit.
The comparison circuit is the bleeder circuit who comprises 18V stabilivolt Z1, resistance R3 and resistance R4 series connection, the positive pole of the power supply input end of dc-to-ac converter is connected to stabilivolt Z1's negative pole, resistance R4's other end ground connection.
Control circuit include relay K1 and NPN type triode Q1, triode Q1's base is connected through resistance R4 to comparison circuit's output, triode Q1's projecting pole ground connection, triode Q1's collecting electrode passes through relay K1's coil connection VCC power.
The utility model discloses a voltage doubling rectifier circuit includes the full-bridge rectifier circuit that comprises diode D1, D2, D3, D4, and DC changes the input of AC circuit, voltage doubling rectifier circuit's negative pole ground connection to voltage doubling rectifier circuit's positive pole; the negative electrode of the capacitor C1 is connected in series with the positive electrode of the capacitor C2, the positive electrode of the capacitor C1 is connected with the positive electrode of the voltage-doubling rectifying circuit, the negative electrode of the capacitor C2 is grounded, the resistor R1 is connected in parallel with two ends of the capacitor C1, and the resistor R2 is connected in parallel with two ends of the capacitor C2.
The normally closed contact of relay K1 connects diode D2's positive pole and diode D4's negative pole among the voltage doubling rectifier circuit, and electric capacity C1's negative pole and electric capacity C2's positive pole are connected to another contact of relay K1.
Compared with the prior art, the utility model, following beneficial effect has: when the inverter is connected with an external +12V direct-current power supply, the relay K1 is normally closed, and the rectifying circuit is in a voltage-multiplying rectifying working state; when the inverter is connected with an external +24V direct-current power supply, the normally closed contact of the relay K1 is disconnected, the voltage doubling circuit is closed, and the voltage doubling rectifying circuit is changed into a common full-bridge rectifying circuit, so that when the inverter is connected with an external +12V direct-current power supply or a +24V direct-current power supply, the direct-current voltage output by rectification is the same, the direct-current voltage can output AC220V through a DC-to-AC circuit, and the inverter can be suitable for the input of +12V and +24V voltages, namely, is suitable for a car or a large truck; the inverter can realize +12V and +24V voltage input without adding a winding on the secondary side of the transformer, improves the universality of transformer parts, has simple circuit and improved reliability, simplifies the production process, reduces the cost and is beneficial to product miniaturization.
Drawings
Fig. 1 is a schematic circuit diagram according to an embodiment of the present invention.
Fig. 2 is a detailed circuit diagram of an embodiment of the present invention.
Detailed Description
Referring to fig. 1, the present embodiment includes a PWM generating circuit, a push-pull circuit, a transformer, a voltage doubling rectifying circuit, a DC-to-AC circuit, and an AC socket, where a pulse signal output terminal of the PWM generating circuit is connected to an input terminal of the push-pull circuit, and an output terminal of the push-pull circuit is connected to a primary winding of the transformer.
The embodiment further comprises a comparison circuit and a control circuit, wherein the input end of the comparison circuit is connected with the power supply input end of the inverter, the output end of the comparison circuit is connected with the input end of the control circuit, and the control signal output end of the control circuit is connected with the control signal input end of the voltage-doubling rectifying circuit. The input end of the voltage doubling rectifying circuit is connected with two ends of a secondary winding of the transformer, the output end of the voltage doubling rectifying circuit is connected with the input end of the DC-to-AC circuit, and the output end of the DC-to-AC circuit is connected with the AC socket.
Referring to fig. 2, the comparison circuit is a voltage division circuit formed by connecting a voltage regulator tube Z1, a resistor R3 and a resistor R4 in series, the negative electrode of the voltage regulator tube Z1 is connected with the positive electrode of the power supply input end of the inverter, and the other end of the resistor R4 is grounded. The capacitor C3 and the resistor R4 are connected in parallel to form an RC filter circuit.
The control circuit comprises a relay K1 and an NPN type triode Q1, the output end of the comparison circuit is connected with the base electrode of the triode Q1 through a resistor R4, the emitting electrode of the triode Q1 is grounded, and the collecting electrode of the triode Q1 is connected with a VCC power supply through a coil of a relay K1.
The voltage-multiplying rectifying circuit comprises a full-bridge rectifying circuit consisting of diodes D1, D2, D3 and D4, the anode of the voltage-multiplying rectifying circuit is connected with the input end of the DC-AC conversion circuit, and the cathode of the voltage-multiplying rectifying circuit is grounded; the negative electrode of the capacitor C1 is connected in series with the positive electrode of the capacitor C2, the positive electrode of the capacitor C1 is connected with the positive electrode of the voltage-doubling rectifying circuit, the negative electrode of the capacitor C2 is grounded, the resistor R1 is connected in parallel with two ends of the capacitor C1, and the resistor R2 is connected in parallel with two ends of the capacitor C2.
The normally closed contact of the relay K1 is connected with the anode of the diode D2 and the cathode of the diode D4 in the voltage-doubling rectifying circuit, and the other contact of the relay K1 is connected with the cathode of the capacitor C1 and the anode of the capacitor C2.
The working principle of the embodiment is as follows:
when the inverter is connected with an external +12V direct-current power supply, a +12V direct-current voltage is applied to the negative electrode of an 18V voltage-stabilizing tube Z1, the voltage cannot break through an 18V voltage-stabilizing tube Z1, the base electrode of a triode Q1 has no voltage, a triode Q1 is not conducted, the coil of a relay K1 has no current, the normally closed contact of a relay K1 is still closed, the capacitor C1 is charged in the positive half cycle of the voltage of the secondary winding of the transformer T1 from the pin 6 of the transformer T1 through a diode D1, a capacitor C1, the normally closed contact of a relay K1 to the pin 5 of the secondary winding of the T1, and a path is formed in the positive half cycle from the pin 6 of the transformer T1 through a diode D1, a resistor R1, a capacitor C2 and a diode D4 to the pin. The negative half cycle of the voltage of the secondary winding of the transformer T1 is from pin 5 of T1 to pin 6 of the secondary winding of T1 through normally closed contact K1 of relay K1, capacitor C2 and diode D3, and the negative half cycle is also provided with a path from pin 5 of T1 to pin 6 of the secondary winding of T1 through diode D2, capacitor C1, resistor R2, diode D3. At this time, the voltage of HV to ground is the superimposed voltage of the capacitors C1 and C2 connected in series, and a voltage doubling is generated.
When the inverter is connected with an external +24V direct-current power supply, a +24V direct-current voltage is applied to the negative electrode of an 18V voltage-stabilizing tube Z1, the +24V voltage is larger than the voltage-stabilizing value of a voltage-stabilizing tube Z1, the voltage-stabilizing tube Z1 breaks down, resistors R3 and R4 are connected in series to divide the voltage, the base electrode of a triode Q1 obtains positive bias voltage, a triode Q1 conducts a relay K1, a coil of the relay K1 has current passing through, a normally closed contact is disconnected, the voltage-multiplying rectifying circuit is changed into a conventional full-bridge rectifying circuit, and the voltage-.
When the inverter is connected with an external +12V direct-current power supply, the relay K1 is normally closed, and the rectifying circuit is in a voltage-multiplying rectifying working state; when this inverter connects outside +24V DC power supply, relay K1 normally closed contact disconnection, voltage doubling circuit closes, voltage doubling rectifier circuit becomes ordinary full-bridge rectifier circuit, thereby when realizing that the inverter connects outside +12V DC power supply or +24V DC power supply, the direct current voltage of its voltage doubling rectifier circuit output is the same, this direct current voltage changes the AC that the AC circuit can both output AC220V through DC, thereby can make this inverter be fit for the input of +12V and +24V two kinds of voltages, be applicable to car or lorry promptly simultaneously.
Claims (5)
1. A vehicle-mounted dual-purpose inverter comprises a push-pull circuit, a transformer, a voltage doubling rectifying circuit and a DC-to-AC circuit, and is characterized in that: the input end of the comparison circuit is connected with the power supply input end of the inverter, the output end of the comparison circuit is connected with the input end of the control circuit, and the control signal output end of the control circuit is connected with the control signal input end of the voltage-multiplying rectification circuit; the input end of the voltage doubling rectifying circuit is connected with two ends of a secondary winding of the transformer, and the output end of the voltage doubling rectifying circuit is connected with the DC-to-AC circuit.
2. The vehicle-mounted dual-purpose inverter according to claim 1, wherein: the comparison circuit is a voltage division circuit formed by connecting an 18V voltage-regulator tube Z1, a resistor R3 and a resistor R4 in series, the negative electrode of the voltage-regulator tube Z1 is connected with the positive electrode of the power supply input end of the inverter, and the other end of the resistor R4 is grounded.
3. The vehicle-mounted dual-purpose inverter according to claim 1, wherein: the control circuit comprises a relay K1 and an NPN type triode Q1, the output end of the comparison circuit is connected with the base electrode of the triode Q1 through a resistor R4, the emitting electrode of the triode Q1 is grounded, and the collecting electrode of the triode Q1 is connected with a VCC power supply through a coil of a relay K1.
4. The vehicle-mounted dual-purpose inverter according to claim 1, wherein: the voltage-multiplying rectifying circuit comprises a full-bridge rectifying circuit consisting of diodes D1, D2, D3 and D4, the anode of the voltage-multiplying rectifying circuit is connected with the input end of the DC-AC conversion circuit, and the cathode of the voltage-multiplying rectifying circuit is grounded; the negative electrode of the capacitor C1 is connected in series with the positive electrode of the capacitor C2, the positive electrode of the capacitor C1 is connected with the positive electrode of the voltage-doubling rectifying circuit, the negative electrode of the capacitor C2 is grounded, the resistor R1 is connected in parallel with two ends of the capacitor C1, and the resistor R2 is connected in parallel with two ends of the capacitor C2.
5. The vehicle-mounted dual-purpose inverter according to claim 3, wherein: the normally closed contact of the relay K1 is connected with the anode of the diode D2 and the cathode of the diode D4 in the voltage-doubling rectifying circuit, and the other contact of the relay K1 is connected with the cathode of the capacitor C1 and the anode of the capacitor C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921143562.6U CN209963971U (en) | 2019-07-20 | 2019-07-20 | Vehicle-mounted dual-purpose inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921143562.6U CN209963971U (en) | 2019-07-20 | 2019-07-20 | Vehicle-mounted dual-purpose inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209963971U true CN209963971U (en) | 2020-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921143562.6U Expired - Fee Related CN209963971U (en) | 2019-07-20 | 2019-07-20 | Vehicle-mounted dual-purpose inverter |
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| Country | Link |
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| CN (1) | CN209963971U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111446872A (en) * | 2020-04-01 | 2020-07-24 | 石家庄通合电子科技股份有限公司 | Transformer transformation ratio adjustable wide-range constant power output switching circuit |
-
2019
- 2019-07-20 CN CN201921143562.6U patent/CN209963971U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111446872A (en) * | 2020-04-01 | 2020-07-24 | 石家庄通合电子科技股份有限公司 | Transformer transformation ratio adjustable wide-range constant power output switching circuit |
| CN111446872B (en) * | 2020-04-01 | 2021-08-31 | 石家庄通合电子科技股份有限公司 | Transformer transformation ratio adjustable wide-range constant power output switching circuit |
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Granted publication date: 20200117 Termination date: 20200720 |