CN213990521U - Rectifying circuit, device and electrical equipment - Google Patents
Rectifying circuit, device and electrical equipment Download PDFInfo
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- CN213990521U CN213990521U CN202022732400.5U CN202022732400U CN213990521U CN 213990521 U CN213990521 U CN 213990521U CN 202022732400 U CN202022732400 U CN 202022732400U CN 213990521 U CN213990521 U CN 213990521U
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Abstract
The utility model is suitable for the technical field of electronic circuits, and provides a rectifying circuit, a rectifying device and electrical equipment, wherein the circuit comprises a transformer, a first rectifying module and a second rectifying module; two ends of a primary winding of the transformer are respectively connected with an alternating current power supply; two ends of a secondary winding of the transformer are respectively connected with the alternating current input end of the first rectifying module; a tap led out from a secondary winding of the transformer is connected with an alternating current input end of the second rectification module; a first voltage is output between the positive direct current output end and the negative direct current output end of the first rectifying module, and a second voltage is output between the direct current output end of the second rectifying module and the negative direct current output end of the first rectifying module. The utility model provides a need design a lot of components and parts and make the problem of incremental cost when current rectification output dual voltage value.
Description
Technical Field
The utility model belongs to the technical field of the electronic circuit, especially, relate to a rectifier circuit, device and electrical equipment.
Background
At present, more and more electric appliances adopt a commercial power supply as a power supply, wherein in order to realize normal working and power supply of module devices such as a controller and the like in the electric appliances, a rectifying circuit is generally adopted to rectify alternating current into target direct current for output.
However, when a plurality of different voltage values are required for the dc voltage outputted by rectifying the ac power into the dc power in the existing electrical equipment products, it is usually necessary to design a complicated circuit structure to support the output of dual voltage or even multiple voltages, which results in the need to add components and design production costs.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide a rectifier circuit, need design a lot of components and parts and make the problem of incremental cost when aiming at solving current rectification output dual voltage value.
The embodiment of the utility model provides a realize like this, a rectifier circuit, the circuit includes:
the transformer, the first rectifying module and the second rectifying module;
two ends of a primary winding of the transformer are respectively connected with an alternating current power supply;
two ends of a secondary winding of the transformer are respectively connected with the alternating current input end of the first rectifying module;
a tap led out from a secondary winding of the transformer is connected with an alternating current input end of the second rectifying module;
a first voltage is output between the positive direct current output end and the negative direct current output end of the first rectifying module, and a second voltage is output between the direct current output end of the second rectifying module and the negative direct current output end of the first rectifying module.
Furthermore, the circuit also comprises a first filtering module and a second filtering module;
the first filtering module is respectively connected with the positive direct current output end and the negative direct current output end of the first rectifying module and is used for filtering out clutter in the output first voltage;
the second filtering module is respectively connected with the direct current output end of the second rectifying module and the negative direct current output end of the first rectifying module and used for filtering out noise waves in the second voltage output by the second filtering module.
Further, the first rectification module includes:
a first diode, a second diode, a third diode, and a fourth diode;
the positive pole of the first diode is connected with the negative pole of the fourth diode to form a first alternating current input end of the first rectifying module, the positive pole of the second diode is connected with the negative pole of the third diode to form a second alternating current input end of the first rectifying module, the negative pole of the first diode is connected with the negative pole of the second diode to form a positive direct current output end of the first rectifying module, and the positive pole of the third diode is connected with the positive pole of the fourth diode to form a negative direct current output end of the first rectifying module.
Further, the second rectifying module comprises a fifth diode;
the positive pole of the fifth diode is the alternating current input end of the second rectifying module, and the negative pole of the fifth diode is the direct current output end of the second rectifying module.
Furthermore, the first filter module comprises a first filter capacitor, the positive pole of the first filter capacitor is connected with the positive direct current output end of the first rectifier module, and the negative pole of the first filter capacitor is connected with the negative direct current output end of the first rectifier module;
the second filter module comprises a second filter capacitor, the positive pole of the second filter capacitor is connected with the direct current output end of the second rectifier module, and the negative pole of the second filter capacitor is connected with the negative direct current output end of the first rectifier module.
Further, the tap is a center tap in a secondary winding of the transformer, and the first voltage is twice the second voltage.
Another embodiment of the present invention further provides a rectifying device, wherein the rectifying device comprises the above rectifying circuit.
Another embodiment of the present invention further provides an electrical apparatus, the electrical apparatus includes the above rectifying device.
The rectifying circuit provided by the embodiment of the utility model can convert the voltage provided by the AC power supply into the AC voltage required by the work due to the transformer, the alternating voltage is rectified to a direct voltage by a first rectifying module arranged, which, by a second rectifying module arranged in connection with a tap in the secondary winding of the transformer, so that the alternating voltage between the secondary winding of the transformer and the tap can be converted into a direct voltage, and is different from the DC voltage rectified by the first rectifying module, so that two different DC voltage values can be effectively rectified, the output of full-wave double voltage can be realized only by the arranged first rectifying module and the second rectifying module, the arrangement of components is reduced, the rectifying circuit is simplified, meanwhile, the hardware cost can be effectively reduced, and the problem that the cost is increased due to the fact that a plurality of components are required to be designed when the existing rectification output double-voltage value is solved.
Drawings
Fig. 1 is a schematic block diagram of a rectifier circuit according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a rectifier circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model discloses a tap department in the secondary winding of transformer connects a second rectifier module for this second rectifier module can reform a rectifier bridge with the help of two bridge arms in the first rectifier module, realizes exporting another voltage value different with the first rectifier module output voltage value, makes can effectual output full wave dual voltage, need design many components and parts and make the problem of incremental cost when solving current rectification output dual voltage value.
Example one
Please refer to fig. 1, which is a schematic block diagram of a rectifier circuit according to a first embodiment of the present invention, for convenience of description, only the parts related to the embodiments of the present invention are shown, the rectifier circuit according to an embodiment of the present invention includes:
a transformer 20, a first rectification module 30, and a second rectification module 40;
two ends of a primary winding of the transformer 20 are respectively connected with an alternating current power supply;
two ends of the secondary winding of the transformer 20 are respectively connected with the alternating current input end of the first rectifying module 30;
a tap led out from the secondary winding of the transformer 20 is connected with an alternating current input end of the second rectifying module 40;
a first voltage is output between the positive dc output terminal and the negative dc output terminal of the first rectifying module 30, and a second voltage is output between the dc output terminal of the second rectifying module 40 and the negative dc output terminal of the first rectifying module 30.
In an embodiment of the present invention, the transformer 20 is used for adjusting the ac power to the target voltage of the required output, wherein the transformer 20 includes an input winding and an output winding, the turn ratio of the input winding to the output winding is equal to the input-output voltage ratio, and the relationship between the input voltage and the output voltage is adjusted by changing the number of turns of the winding, for example, in this embodiment, the transformer 20 is specifically 220V to 24V, it can be understood that the transformer 20 is used for adjusting the 220V ac voltage input by the ac power to 24V ac voltage, and the turn ratio of the input winding to the output winding of the transformer 20 is 220/24, it can be understood that in other embodiments of the present invention, the ac power can be 380V or other voltage levels, and the target voltage required to be output can be other voltage values, the transformer 20 is set according to actual use requirements, and is not specifically limited herein, and the turn ratio is determined by the transformer 20 according to the ac power voltage required by actual use and the target voltage required to be output.
Further, in an embodiment of the present invention, a tap is led out from the secondary winding of the transformer 20, which is a tap led out from the coil of the secondary winding, wherein, since the output voltage of the transformer 20 is related to the number of turns of the winding thereof, when the tap is disposed at different positions, the output voltage is different, and when the tap is located at the center position of the secondary winding, that is, when there is a center tap at one half of the secondary winding, the voltage absolute values at two ends of the secondary winding are equal and the phases are opposite, and this is true at any instant. At this time, the voltage value from the center tap to one end of the secondary winding is half of the output voltage of the transformer 20, that is, in this embodiment, when the output voltage of the transformer 20 is 24V, the voltage from the center tap to one end of the secondary winding is 12V.
Further, in an embodiment of the present invention, two ends of the primary winding of the transformer 20 are respectively connected to two ends of the ac power source, two ends of the secondary winding of the transformer 20 are respectively connected to the ac input end of the first rectification module 30, and a tap led out from the secondary winding of the transformer 20 is connected to the ac input end of the second rectification module 40.
Wherein, when specifically implementing, refer to fig. 2, for the utility model discloses rectifier circuit's circuit diagram that the embodiment provided, first rectifier module 30 includes:
a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4;
the anode of the first diode D1 is connected with the cathode of the fourth diode D4 to form a first ac input end of the first rectifying module 30, the anode of the second diode D2 is connected with the cathode of the third diode D3 to form a second ac input end of the first rectifying module 30, the cathode of the first diode D1 is connected with the cathode of the second diode D2 to form a positive dc output end of the first rectifying module 30, and the anode of the third diode D3 is connected with the anode of the fourth diode D4 to form a negative dc output end of the first rectifying module 30. When the concrete implementation, its first diode D1, second diode D2, third diode D3 and fourth diode D4 all adopt same model, adopt RL207 model diode like this embodiment, can understand in the embodiment the utility model discloses a in other embodiments, it can also adopt other model diodes.
The first rectifying module 30 is a full-bridge rectifying bridge, and includes an ac input terminal and a dc output terminal, wherein two ac input terminals of the first rectifying module 30 are respectively connected to two ends of the secondary winding of the transformer 20, as shown in fig. 2, a first ac input terminal thereof is connected to a first end a of the secondary winding, and a second ac input terminal thereof is connected to a second end b of the secondary winding. When the rectifier circuit is used, the two dc output terminals of the first rectifier module 30 are respectively connected to a load, and when the first end a of the secondary winding of the transformer 20 is positive and the second end b is negative, a current flows from the first end a of the secondary winding to the positive dc output terminal through the first diode D1, flows from the negative dc output terminal to the third diode D3 after flowing through the connected load, and finally flows to the second end b of the secondary winding; similarly, when the first end a of the secondary winding is negative and the second end b is positive, the current flows from the second end b of the secondary winding to the positive dc output end after flowing through the second diode D2, flows to the fourth diode D4 from the negative dc output end after flowing through the connected load, and finally flows to the first end a of the secondary winding; therefore, the first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 form a full bridge rectifier bridge, so that the dc output terminal of the first rectifier module 30 can stably output the first voltage 24V.
Further, in an embodiment of the present invention, referring to fig. 2, the second rectification module 40 includes a fifth diode D5; when the diode is implemented, the fifth diode D5 adopts an IN4007 type diode, which is mainly a rectified current different from the other diodes, and it can be understood that the diode can also adopt other types IN other embodiments of the present invention.
The anode of the fifth diode D5 is the ac input terminal of the second rectifying module 40, and the cathode of the fifth diode D5 is the dc output terminal of the second rectifying module 40. That is, a tap led out from the secondary winding of the transformer 20 is connected to the positive electrode of the fifth diode D5, wherein a second voltage is output between the dc output terminal of the second rectifying module 40 and the negative dc output terminal of the first rectifying module 30, that is, a second voltage is output between the negative electrode of the fifth diode D5 and the end where the third diode D3 and the fourth diode D4 are connected, in practical application, the tap is a center tap c in the secondary winding of the transformer 20, that is, the tap is located at the center position of the secondary winding, and at this time, the voltage value from the center tap c to any end of the secondary winding is half of the output voltage of the transformer 20.
When the rectifier circuit is used specifically, the dc output end of the second rectifier module 40 and the negative dc output end of the first rectifier module 30 are connected to a load respectively, and when the first end a of the secondary winding of the transformer 20 is positive and the second end b is negative, current flows from the center tap c of the secondary winding to the connected load after flowing through the fifth diode D5, flows from the negative dc output end of the first rectifier module 30 to the third diode D3, and finally flows to the second end b of the secondary winding; similarly, when the first end a of the secondary winding of the transformer 20 is negative and the second end b is positive, the current flows from the center tap c of the secondary winding to the connected load through the fifth diode D5, flows from the negative dc output terminal of the first rectifying module 30 to the fourth diode D4, and finally flows to the first end a of the secondary winding; at this time, the second rectification module 40 forms a new rectification bridge by means of the two legs (i.e., the third diode D3 and the fourth diode D4) of the first rectification module 30, and the center tap c is the center position of the secondary coil of the transformer 20, so that the second voltage 12V can be stably output between the dc output terminal of the second rectification module 40 and the negative dc output terminal of the first rectification module 30, that is, the first voltage is twice the second voltage.
Further, in an embodiment of the present invention, the rectifier circuit further includes a first filtering module 50 and a second filtering module 60;
the first filtering module 50 is respectively connected to the positive dc output terminal and the negative dc output terminal of the first rectifying module 30, and is configured to filter noise in the output first voltage;
the second filtering module 60 is respectively connected to the dc output terminal of the second rectifying module 40 and the negative dc output terminal of the first rectifying module 30, and is configured to filter noise in the output second voltage.
Further, referring to fig. 2, the first filter module 50 includes a first filter capacitor C1, a positive electrode of the first filter capacitor C1 is connected to the positive dc output terminal of the first rectifier module 30, and a negative electrode of the first filter capacitor C1 is connected to the negative dc output terminal of the first rectifier module 30; that is, the anode of the first filter capacitor C1 is connected to the end of the first diode D1 connected to the cathode of the second diode D2, and the cathode of the first filter capacitor C1 is connected to the end of the third diode D3 connected to the anode of the fourth diode D4.
The second filter module 60 comprises a second filter capacitor C2, the positive pole of the second filter capacitor C2 is connected with the dc output terminal of the second rectifier module 40, and the negative pole of the second filter capacitor C2 is connected with the negative dc output terminal of the first rectifier module 30; that is, the anode of the second filter capacitor C2 is connected to the cathode of the fifth diode D5, and the cathode of the second filter capacitor C2 is connected to the end of the third diode D3 connected to the anode of the fourth diode D4.
When in use, two ends of the primary winding of the transformer 20 are respectively connected with an alternating current power supply, a first end a of the secondary winding of the transformer 20 is respectively connected with the anode of a first diode D1 and the cathode of a fourth diode D4, a second end b of the secondary winding of the transformer 20 is respectively connected with the anode of a second diode D2 and the cathode of a third diode D3, a center tap c of the transformer 20 is connected with the anode of a fifth diode D5, the cathode of the first diode D1 and the cathode of the second diode D2 are connected to form a positive direct current output end of the first rectifying module 30, the anode of the third diode D3 and the anode of the fourth diode D4 are connected to form a negative direct current output end of the first rectifying module 30, a first voltage is output between the positive direct current output end and the negative direct current output end of the first rectifying module 30, a second voltage is output between the direct current output end of the second rectifying module 40 and the negative direct current output end of the first rectifying module 30, meanwhile, the first voltage is twice of the second voltage, so that the full-wave dual-voltage output can be realized under the condition that the rectifying circuit is only provided with the transformer 20 and five diodes, components are effectively reduced, and the cost is reduced.
In this embodiment, the transformer is provided to convert the voltage provided by the ac power source into the ac voltage required for operation, the alternating voltage is rectified to a direct voltage by a first rectifying module arranged, which, by a second rectifying module arranged in connection with a tap in the secondary winding of the transformer, so that the alternating voltage between the secondary winding of the transformer and the tap can be converted into a direct voltage, and is different from the DC voltage rectified by the first rectifying module, so that two different DC voltage values can be effectively rectified, the output of full-wave double voltage can be realized only by the arranged first rectifying module and the second rectifying module, the arrangement of components is reduced, the rectifying circuit is simplified, meanwhile, the hardware cost can be effectively reduced, and the problem that the cost is increased due to the fact that a plurality of components are required to be designed when the existing rectification output double-voltage value is solved.
Example two
The second embodiment of the present invention further provides a rectifying device, which includes a rectifying circuit as the first embodiment.
The rectifying device provided by the embodiment can convert the voltage provided by the alternating current power supply into the alternating current voltage required by operation due to the arranged transformer, the alternating voltage is rectified to a direct voltage by a first rectifying module arranged, which, by a second rectifying module arranged in connection with a tap in the secondary winding of the transformer, so that the alternating voltage between the secondary winding of the transformer and the tap can be converted into a direct voltage, and is different from the DC voltage rectified by the first rectifying module, so that two different DC voltage values can be effectively rectified, the output of full-wave double voltage can be realized only by the arranged first rectifying module and the second rectifying module, the arrangement of components is reduced, the rectifying circuit is simplified, meanwhile, the hardware cost can be effectively reduced, and the problem that the cost is increased due to the fact that a plurality of components are required to be designed when the existing rectification output double-voltage value is solved.
EXAMPLE III
The third embodiment of the present invention further provides an electrical apparatus, including the rectifying device as in the second embodiment.
The electric appliance provided by the embodiment can convert the voltage provided by the alternating current power supply into the alternating current voltage required by operation due to the transformer arranged in the rectifying device, the alternating voltage is rectified to a direct voltage by a first rectifying module arranged, which, by a second rectifying module arranged in connection with a tap in the secondary winding of the transformer, so that the alternating voltage between the secondary winding of the transformer and the tap can be converted into a direct voltage, and is different from the DC voltage rectified by the first rectifying module, so that two different DC voltage values can be effectively rectified, the output of full-wave double voltage can be realized only by the arranged first rectifying module and the second rectifying module, the arrangement of components is reduced, the rectifying circuit is simplified, meanwhile, the hardware cost can be effectively reduced, and the problem that the cost is increased due to the fact that a plurality of components are required to be designed when the existing rectification output double-voltage value is solved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A rectifier circuit, characterized in that the circuit comprises:
the transformer, the first rectifying module and the second rectifying module;
two ends of a primary winding of the transformer are respectively connected with an alternating current power supply;
two ends of a secondary winding of the transformer are respectively connected with the alternating current input end of the first rectifying module;
a tap led out from a secondary winding of the transformer is connected with an alternating current input end of the second rectifying module;
a first voltage is output between the positive direct current output end and the negative direct current output end of the first rectifying module, and a second voltage is output between the direct current output end of the second rectifying module and the negative direct current output end of the first rectifying module.
2. The rectifier circuit of claim 1 wherein said circuit further comprises a first filter module and a second filter module;
the first filtering module is respectively connected with the positive direct current output end and the negative direct current output end of the first rectifying module and is used for filtering out clutter in the output first voltage;
the second filtering module is respectively connected with the direct current output end of the second rectifying module and the negative direct current output end of the first rectifying module and used for filtering out noise waves in the second voltage output by the second filtering module.
3. The rectifier circuit of claim 1, wherein said first rectifier module comprises:
a first diode, a second diode, a third diode, and a fourth diode;
the positive pole of the first diode is connected with the negative pole of the fourth diode to form a first alternating current input end of the first rectifying module, the positive pole of the second diode is connected with the negative pole of the third diode to form a second alternating current input end of the first rectifying module, the negative pole of the first diode is connected with the negative pole of the second diode to form a positive direct current output end of the first rectifying module, and the positive pole of the third diode is connected with the positive pole of the fourth diode to form a negative direct current output end of the first rectifying module.
4. The rectifier circuit of claim 1 wherein said second rectifier module includes a fifth diode;
the positive pole of the fifth diode is the alternating current input end of the second rectifying module, and the negative pole of the fifth diode is the direct current output end of the second rectifying module.
5. The rectifier circuit according to claim 2, wherein said first filter module comprises a first filter capacitor, an anode of said first filter capacitor is connected to a positive dc output terminal of said first rectifier module, and a cathode of said first filter capacitor is connected to a negative dc output terminal of said first rectifier module;
the second filter module comprises a second filter capacitor, the positive pole of the second filter capacitor is connected with the direct current output end of the second rectifier module, and the negative pole of the second filter capacitor is connected with the negative direct current output end of the first rectifier module.
6. The rectifier circuit of claim 1 wherein said tap is a center tap in a secondary winding of said transformer, said first voltage being twice said second voltage.
7. A rectifying arrangement, characterized in that the arrangement comprises a rectifying circuit according to any one of claims 1-6.
8. An electrical apparatus, characterized in that it comprises a rectifying means according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022732400.5U CN213990521U (en) | 2020-11-23 | 2020-11-23 | Rectifying circuit, device and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022732400.5U CN213990521U (en) | 2020-11-23 | 2020-11-23 | Rectifying circuit, device and electrical equipment |
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| Publication Number | Publication Date |
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| CN213990521U true CN213990521U (en) | 2021-08-17 |
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| CN202022732400.5U Active CN213990521U (en) | 2020-11-23 | 2020-11-23 | Rectifying circuit, device and electrical equipment |
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| CN (1) | CN213990521U (en) |
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