A rectifier circuit and method for combining multiple voltages using multiple taps

Abstract

The present invention relates to a rectification circuit and method for combining multiple voltages using multiple taps. The rectification circuit includes a transformer and a rectifier. A plurality of taps are connected to the original secondary winding of the transformer, and the plurality of taps divide the original secondary winding into multiple segments; the rectifier is used to rectify the voltage output by the segmented secondary winding into a DC voltage; wherein, the original secondary winding segment between any two of the taps is the segmented secondary winding; compared with the traditional one secondary winding corresponding to one voltage value, the manufacturing cost of the present invention is lower, the separate setting of the secondary winding is reduced, the volume of the final product can be made smaller, and the circuit layout is more compact.

Description

Technical Field

[0001] The present invention relates to the technical field of power supplies, and particularly relates to a rectification circuit and method for combining multiple voltages by using multiple taps. Background Art

[0002] In the prior art, in the case of a DC power supply requiring multiple DC voltage outputs, the common method is to design multiple windings, with each winding corresponding to one or more full-wave rectification and filtering circuits, and then adding a switching circuit at the back to achieve multiple DC voltage outputs.

[0003] Although this achieves multiple DC voltage outputs, the design of each secondary winding corresponding to one or more full-wave rectification and filtering circuits results in a high manufacturing cost and large volume of the power supply. Summary of the Invention

[0004] In order to solve the technical problems such as high manufacturing cost and large volume of a multi-output DC power supply, the present invention provides a rectification circuit and method for combining multiple voltages by using multiple taps.

[0005] The technical solution of the present invention for solving the above technical problems is as follows:

[0006] A rectification circuit for combining multiple voltages by using multiple taps, comprising a transformer and a rectifier. A plurality of taps are connected to the original secondary winding of the transformer, and the plurality of taps divide the original secondary winding into multiple segments; the rectifier is used to rectify the voltage output by the segmented secondary winding into a DC voltage; wherein, the original secondary winding segment between any two of the taps is the segmented secondary winding.

[0007] The beneficial effect of the present invention is that by setting a plurality of taps, and combining any two taps into an output voltage, and the number of different combined voltages is more than the number of taps, thus realizing the output of different voltage values with fewer taps than the number of taps. Compared with the traditional one secondary winding corresponding to one voltage value, its manufacturing cost is lower, the separate setting of secondary windings is reduced, the volume of the final product can be smaller, and the circuit layout is more compact.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Further, the rectifier includes a plurality of rectification units, and each tap is connected to one rectification unit; the rectifier is specifically used to rectify the voltage output by the segmented secondary winding into a DC voltage by using two rectification units respectively connected to both ends of the segmented secondary winding; wherein, the two rectification units respectively connected to both ends of the segmented secondary winding are specifically two rectification units corresponding to two taps respectively connected to both ends of the segmented secondary winding.

[0010] The beneficial effect of adopting the above further scheme is that by setting one tap corresponding to one rectification unit, each tap has a corresponding rectification unit, and the rectification unit can be directly connected to the corresponding tap, without the need to set a switching switch.

[0011] Further, it further includes a positive rectification output terminal and a negative rectification output terminal. The positive output terminals of all the rectification units are electrically connected to the positive rectification output terminal, and the negative output terminals of all the rectification units are electrically connected to the negative rectification output terminal.

[0012] Further, it further includes a capacitor. Both ends of the capacitor are respectively electrically connected to the positive rectification output terminal and the negative rectification output terminal.

[0013] The beneficial effect of adopting the above further scheme is that by setting a capacitor, the capacitor is used to filter the voltage between the positive rectification output terminal and the negative rectification output terminal.

[0014] Further, a switching device is connected to each of the taps, and the switching device is used to control the on / off between the tap and the corresponding rectification unit.

[0015] The beneficial effect of adopting the above further scheme is that by setting a switching device, the required tap can be conducted with the corresponding rectification unit through the switching device as needed.

[0016] Further, the switching device is a relay.

[0017] The beneficial effect of adopting the above further scheme is that by setting the switching device as a relay, the on / off between the tap and the corresponding rectification unit can be automatically controlled by a single-chip microcomputer or other types of controllers.

[0018] Further, the rectification unit is a rectification half-bridge.

[0019] Further, the rectification half-bridge includes two diodes; the negative electrode of one of the diodes is electrically connected to the positive rectification output terminal, and the positive electrode is respectively electrically connected to the negative electrode of the other diode and the tap corresponding to the rectification half-bridge; the positive electrode of the other diode is electrically connected to the negative rectification output terminal.

[0020] To solve the above technical problems, the present invention further provides a rectification method for combining multiple voltages by using multiple taps, and the specific content is as follows:

[0021] A rectification method for combining multiple voltages by using multiple taps includes the following steps:

[0022] Connect a plurality of taps to the original secondary winding of the transformer;

[0023] The original secondary winding is divided into multiple segments by using multiple of the taps;

[0024] The voltage output from the segmented secondary winding is rectified into a DC voltage by using a rectifier; wherein, the original secondary winding segment between any two of the taps is the segmented secondary winding. Description of the Drawings

[0025] Figure 1 It is a circuit diagram of a rectification circuit that uses multiple taps to combine multiple voltages in an embodiment of the present invention;

[0026] Figure 2 It is a flowchart of a rectification method that uses multiple taps to combine multiple voltages in an embodiment of the present invention. Detailed Embodiments

[0027] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0028] Embodiment 1

[0029] As Figure 1 shown, this embodiment provides a rectification circuit that uses multiple taps to combine multiple voltages, a transformer T1 and a rectifier. Multiple taps are connected to the original secondary winding of the transformer T1, and the multiple taps divide the original secondary winding into multiple segments; the rectifier is used to rectify the voltage output from the segmented secondary winding into a DC voltage; wherein, the original secondary winding segment between any two of the taps is the segmented secondary winding.

[0030] Specifically, the rectifier includes multiple rectification units, and each tap is connected to one rectification unit; the rectifier is specifically used to rectify the voltage output from the segmented secondary winding into a DC voltage by using two of the rectification units respectively connected to both ends of the segmented secondary winding; wherein, the two rectification units respectively connected to both ends of the segmented secondary winding are specifically the two rectification units corresponding to the two taps respectively connected to both ends of the segmented secondary winding. A switching device is connected to each tap, and the switching device is used to control the on / off between the tap and the corresponding rectification unit. The switching device is a relay.

[0031] Specifically, the multiple taps are respectively a first tap e3, a second tap d3, a third tap c3, a fourth tap b3, and a fifth tap a3; the multiple relays respectively include a first relay J1A corresponding to the first tap e3, a second relay J2A corresponding to the second tap d3, a third relay J3A corresponding to the third tap c3, a fourth relay J4A corresponding to the fourth tap b3, and a fifth relay J5A corresponding to the fifth tap a3.

[0032] It further includes a capacitor C1, and both ends of the capacitor C1 are electrically connected to the positive rectification output terminal and the negative rectification output terminal respectively.

[0033] The rectification unit is a rectification half-bridge. The rectification half-bridge includes two diodes; the negative electrode of one of the diodes is electrically connected to the positive rectification output terminal, and the positive electrode is respectively electrically connected to the negative electrode of the other diode and the tap corresponding to the rectification half-bridge; the positive electrode of the other diode is electrically connected to the negative rectification output terminal. The multiple rectification units are respectively the first rectification half-bridge, the second rectification half-bridge, the third rectification half-bridge, the fourth rectification half-bridge, and the fifth rectification half-bridge; the first rectification half-bridge includes a first diode D1 and a second diode D2, the second rectification half-bridge includes a third diode D3 and a fourth diode D4, the third rectification half-bridge includes a fifth diode D5 and a sixth diode D6, the fourth rectification half-bridge includes a seventh diode D7 and an eighth diode D8, and the fifth rectification half-bridge includes a ninth diode D9 and a tenth diode D10.

[0034] When the secondary coil of the transformer T1 still cannot meet the requirement of the number of output voltages, a second transformer T3 can be added to meet the requirement of the number of more output voltages.

[0035] In the embodiment of the present invention, by setting multiple taps and combining any two taps into an output voltage, and the number of different voltages combined will be more than the number of taps. When the number of taps is 5, 10 different voltages of different magnitudes can be combined. Therefore, it realizes the output of different voltage values with fewer taps than the number of taps. Compared with the traditional one secondary winding corresponding to one voltage value, its manufacturing cost is lower, the separate setting of the secondary windings is reduced, the volume of the final product can be smaller, and the circuit layout is more compact. The beneficial effect of adopting the above further solution is that by setting a switching device, the required tap can be conducted with the corresponding rectification unit according to the need through the switching device. The beneficial effect of adopting the above further solution is that by setting the switching device as a relay, the on-off between the tap and the corresponding rectification unit can be automatically controlled by a single-chip microcomputer or other types of controllers. The beneficial effect of adopting the above further solution is that by setting the capacitor C1, the voltage between the positive rectification output terminal and the negative rectification output terminal is filtered by the capacitor C1.

[0036] Embodiment 2

[0037] As Figure 2 shown, this embodiment provides a rectification method for combining multiple voltages by using multiple taps, including the following steps:

[0038] S1. Connect multiple taps to the original secondary winding of the transformer T1.

[0039] S2. Divide the original secondary winding into multiple segments by using multiple of the said taps; wherein, a rectifying unit is connected to each tap; the positive output terminals of all the rectifying units are electrically connected to the positive rectifying output terminal, and the negative output terminals of all the rectifying units are electrically connected to the negative rectifying output terminal; the rectifying unit is a half-bridge rectifier. The half-bridge rectifier includes two diodes; the negative electrode of one of the diodes is electrically connected to the positive rectifying output terminal, and the positive electrode is respectively electrically connected to the negative electrode of the other diode and the tap corresponding to the half-bridge rectifier; the positive electrode of the other diode is electrically connected to the negative rectifying output terminal.

[0040] S3. Rectify the voltage output by the segmented secondary winding into a DC voltage by using a rectifier; wherein, the original secondary winding segment between any two of the said taps is the segmented secondary winding. The two rectifying units connected to both ends of the segmented secondary winding rectify the voltage output by the segmented secondary winding into a DC voltage, and output the DC voltage through the positive rectifying output terminal and the negative rectifying output terminal; wherein, the original secondary winding segment between any two of the said taps is the segmented secondary winding, and the two rectifying units connected to both ends of the segmented secondary winding are the rectifying units corresponding to the taps connected to both ends of the segmented secondary winding.

[0041] In the embodiment of the present invention, by setting multiple taps, and combining any two taps to form an output voltage, and the number of different combined voltages is more than the number of taps. When the number of taps is 5, 10 different voltages of different magnitudes can be combined.

[0042] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the concept and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rectifier circuit that combines multiple voltages using multiple taps, characterized in that: It includes a transformer (T1) and a rectifier. Multiple taps are connected to the original secondary winding of the transformer (T1), and the multiple taps divide the original secondary winding into multiple segments; The rectifier is used to rectify the voltage output by the segmented secondary winding into a DC voltage; wherein, the original secondary winding segment between any two of the taps is the segmented secondary winding; The rectifier includes multiple rectification units, and each tap is connected to one rectification unit; The rectifier is specifically used to rectify the voltage output by the segmented secondary winding into a DC voltage by using two of the rectification units respectively connected to both ends of the segmented secondary winding; Wherein, the two rectification units respectively connected to both ends of the segmented secondary winding are specifically the two rectification units corresponding to the two taps respectively connected to both ends of the segmented secondary winding; A switching device is connected to each tap, and the switching device is used to control the on-off between the tap and the corresponding rectification unit.

2. The rectifier circuit for combining multiple voltages using multiple taps according to claim 1, characterized in that: It further includes a positive rectification output terminal and a negative rectification output terminal. The positive output terminals of all the rectification units are electrically connected to the positive rectification output terminal, and the negative output terminals of all the rectification units are electrically connected to the negative rectification output terminal.

3. The rectifier circuit for combining multiple voltages using multiple taps according to claim 2, wherein: It further includes a capacitor (C1); the capacitor (C1) is used to filter the AC voltage between the positive rectification output terminal and the negative rectification output terminal.

4. The rectifier circuit for combining multiple voltages using multiple taps according to claim 1, characterized in that: The switching device is a relay.

5. The rectifying circuit for combining multiple voltages using multiple taps according to any one of claims 2 to 3, characterized in that: The rectification unit is a rectification half-bridge.

6. The rectifier circuit for combining multiple voltages using multiple taps according to claim 5, wherein: The rectification half-bridge includes two diodes; the negative electrode of one of the diodes is electrically connected to the positive rectification output terminal, and the positive electrode is respectively electrically connected to the negative electrode of the other diode and the tap corresponding to the rectification half-bridge; the positive electrode of the other diode is electrically connected to the negative rectification output terminal.

7. A rectification method for combining multiple voltages using multiple taps, characterized in that, It includes the following steps: Connect multiple taps to the original secondary winding of the transformer (T1); Divide the original secondary winding into multiple segments by using the multiple taps; Rectify the voltage output by the segmented secondary winding into a DC voltage by using a rectifier; wherein, the original secondary winding segment between any two of the taps is the segmented secondary winding; The rectifier includes multiple rectification units, and each tap is connected to one rectification unit; The rectifier is specifically used to rectify the voltage output by the segmented secondary winding into a DC voltage by using two of the rectification units respectively connected to both ends of the segmented secondary winding; Wherein, the two rectification units respectively connected to both ends of the segmented secondary winding are specifically the two rectification units corresponding to the two taps respectively connected to both ends of the segmented secondary winding; A switching device is connected to each tap, and the switching device is used to control the on-off between the tap and the corresponding rectification unit.

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