CN215871222U - Frequency converter switching power supply with voltage regulating circuit - Google Patents
Frequency converter switching power supply with voltage regulating circuit Download PDFInfo
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- CN215871222U CN215871222U CN202121503875.5U CN202121503875U CN215871222U CN 215871222 U CN215871222 U CN 215871222U CN 202121503875 U CN202121503875 U CN 202121503875U CN 215871222 U CN215871222 U CN 215871222U
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Abstract
The utility model discloses a frequency converter switching power supply with a voltage regulating circuit, which comprises a frequency conversion circuit, a transformer circuit and a voltage regulating circuit, wherein the transformer circuit is used for converting a power supply output by the frequency conversion circuit and outputting a voltage VC1 and a voltage VC2, and the voltage regulating circuit is used for boosting or reducing a voltage VC1 so as to enable the value of the voltage VC1 to be close to or the same as the value of the voltage VC 2; the frequency conversion circuit comprises a rectifying unit and a filtering unit which are sequentially connected, and the voltage regulating circuit comprises a switching power supply regulator, an inductor L1 and an inductor L2; the power supply end of the filter unit is connected with the power supply input end of the transformer circuit, the first output winding of the transformer circuit is connected with the switching power supply regulator through an inductor L1, and the second output winding of the transformer circuit is connected with the switching power supply regulator through an inductor L2. The utility model can realize that the voltage VC1 and the voltage VC2 supply power to the load together, and ensure that the load with different weights can still be driven on the premise of not changing a switching transformer.
Description
Technical Field
The utility model relates to the field of switching power supplies, in particular to a frequency converter switching power supply with a voltage regulating circuit.
Background
The general frequency converter generally selects a flyback type switching power supply because a control system generally has 3-5 different voltages, such as 3.3V, 5V, 12V, 15V or 24V, and is easy to generate a plurality of groups of switching power supplies with voltage output.
The switch transformer is a core component of the whole switch power supply, and due to the updating and upgrading requirements of hardware of the frequency converter, the specification of the frequency converter is more and more, and the load of each group of power supplies of the switch transformer is also changed continuously, so that the parameters of the switch transformer need to be adjusted continuously in the design of the switch transformer, the new specification of the switch transformer is generated, the single output of a transformer manufacturer is reduced, the line needs to be changed frequently, and the cost of a single transformer is increased. Moreover, the design change of the switching transformer is often the adjustment of the load weight caused by the change of each group of loads according to the requirement of the circuit function, for example, the light load is originally changed into the heavy load, and the heavy load is changed into the light load; in the prior art, the secondary side winding of the output of the switching transformer needing to increase the load is designed again, and if the heavy load is changed into a light load, the load design is generally not randomly reduced, and the load of a single winding is too heavy, so that voltage stabilization is difficult to realize on the output voltage of the winding group, and meanwhile, the output voltages of other groups are influenced.
Accordingly, the present inventors have conducted extensive studies and have made the present invention.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a frequency converter switching power supply with a voltage regulating circuit, which can adapt to loads with different weights on the basis of not changing a switching transformer so as to meet the high-yield requirement of the switching transformer with a single specification and reduce the production cost.
In order to achieve the above purpose, the solution of the utility model is as follows:
a converter switching power supply with a voltage regulation circuit comprises a frequency conversion circuit, a transformer circuit for converting power output by the frequency conversion circuit and outputting a voltage VC1 and a voltage VC2, and a voltage regulation circuit for boosting or reducing the voltage VC1 so that the value of the voltage VC1 is close to or the same as the value of the voltage VC 2; the frequency conversion circuit comprises a rectifying unit, a charging buffer unit and a filtering unit which are sequentially connected, and the voltage regulating circuit comprises a switching power supply regulator, an inductor L1 and an inductor L2; the power output end of the filtering unit is connected with the power input end of the transformer circuit, the first output winding of the transformer circuit is connected with the switching power supply regulator through the inductor L1, and the second output winding of the transformer circuit is connected with the switching power supply regulator through the inductor L2.
The transformer circuit comprises a switching transformer comprising the first input winding, a second input winding, the first output winding, and the second output winding;
the first end of the first input winding is respectively connected with the first end of a resistor R5 and the anode of the power supply, the second end of the first input winding is connected with the driving end of a primary drive protection circuit, the first end of the second input winding is connected with the anode of a diode D3, and the cathode of the diode D3 is respectively connected with the anode of a capacitor C3 and the power supply end of the primary drive protection circuit; a second end of the second input winding is respectively connected with a negative electrode of the capacitor C3, a power grounding end of the primary drive protection circuit and a negative electrode of the power supply; the first end of the first output winding is connected with the anode of a diode D1, and the cathode of the diode D1 is respectively connected with the anode of a capacitor C1, the second end of a resistor Rsc1 and the VCC end of the switching power supply regulator; the second end of the first output winding is respectively connected with the negative electrode of the capacitor C1 and the grounding end; the first end of the second output winding is connected with the anode of a diode D2, the cathode of the diode D2 is respectively connected with the anode of the capacitor C2 and the first end of the coil of the inductor L2, and the second end of the second output winding is respectively connected with the cathode of the capacitor C2 and the ground terminal.
The output voltage of the first output winding is the voltage VC1, the output voltage of the second output winding is the voltage VC2, the voltage VC1 and the voltage VC2 are both connected with the detection input end of a secondary voltage feedback circuit, and the output end of the secondary voltage feedback circuit is connected with the driving end of the primary driving protection circuit.
When the voltage VC1 is less than the voltage VC2, the SC end of the switching power supply regulator is divided into two paths, one path is connected to the second end of the coil of the inductor L1, and the other path is connected to the anode of the diode D4; the cathode of the diode D4 is connected to the second terminal of the resistor R2, the anode of the capacitor C4, and the second terminal of the inductor L2, respectively, the cathode of the capacitor C4 is grounded, and the first terminal of the resistor R2 is connected to the VF terminal of the switching power supply regulator and grounded through the resistor R3, respectively; a first end of a coil of the inductor L1 is connected to a first end of a resistor R1, a first end of the resistor Rsc1 and an IPK end of the switching power supply regulator, respectively, a second end of the resistor R1 is connected to a DC end of the switching power supply regulator, and an SE end of the switching power supply regulator is grounded.
When the voltage VC1 is greater than the voltage VC2, the SC end of the switching power supply regulator is connected to the first end of the resistor R2, the IPK end of the switching power supply regulator, and the first end of the resistor Rsc1, respectively; the SE end of the switching power supply regulator is respectively connected with the cathode of a diode D4 and the first end of the coil of an inductor L1, the anode of the diode D4 is grounded, the second end of the coil of the inductor L1 is respectively connected with the second end of a resistor R2, the anode of a capacitor C4 and the second end of the coil of the inductor L2, the first end of the resistor R2 is respectively connected with the VF end of the switching power supply regulator and is grounded through the resistor R3, and the cathode of the capacitor C4 is grounded.
The switching power supply regulator is a regulator adopting a 34063 module, the SC end of the switching power supply regulator is an SC input end, the SE end is an SE output end, and the interior of the switching power supply regulator is connected with a semiconductor switch corresponding to the SC end and the SE end.
After adopting the structure, the utility model has the following beneficial effects: the arrangement of the voltage regulating circuit is adopted, under the premise that the load is aggravated to enable the output voltage of the switching transformer to be insufficient for the driving force of the load, the voltage VC1 of the first output winding is boosted or reduced through the voltage regulating circuit, so that the value of the boosted or reduced voltage VC1 is close to or equal to the value of the voltage VC2, then the voltage VC1 and the voltage VC2 supply power to the load together to provide enough driving force for the load, and the load operates.
Drawings
FIG. 1 is a block circuit diagram of the present invention;
FIG. 2 is a schematic circuit diagram of the boost mode of the present invention;
FIG. 3 is a circuit diagram of the buck mode of the present invention.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.
The utility model provides a converter switching power supply with voltage control circuit, as shown in fig. 1-3, including inverter circuit, transformer circuit and voltage control circuit, inverter circuit is used for exporting alternating current power, voltage control circuit includes switching power supply regulator, inductance L1 and inductance L2, inverter circuit includes the rectifier cell that connects gradually, charging buffer cell and filtering unit, inverter circuit is current conventional converter, the power output end of filtering unit connects transformer circuit's power input end, transformer circuit's first output winding passes through inductance L1 and connects switching power supply regulator, transformer circuit's second output winding passes through inductance L2 and connects switching power supply regulator. The transformer circuit is used for converting a power supply generated by a filter unit in the frequency conversion circuit and outputting a voltage VC1 and a voltage VC 2; the voltage regulating circuit is used for regulating the voltage VC1 according to the detected magnitude of the voltage VC2, and making the voltage value of the voltage VC1 close to or equal to the voltage value of the voltage VC2, so that the voltage VC1 and the voltage VC2 jointly supply power to the load to drive the load.
Specifically, the transformer circuit described above includes a switching transformer that includes a first input winding, a second input winding, a first output winding, and a second output winding. The first end of the first input winding is connected with the anode P (+) of the filtering unit and the first end of the resistor R5 respectively, and the second end of the first input winding is connected with the driving end of the primary driving protection circuit; the first end of the second input winding is connected with the anode of the diode D3, the cathode of the diode D3 is respectively connected with the anode of the capacitor C3, the second end of the resistor R5 and the power supply end of the primary driving protection circuit, and the second end of the second input winding is respectively connected with the cathode of the capacitor C3, the power supply ground end of the primary driving protection circuit and the cathode N (-) of the filter unit; the first end of the first output winding is connected with the anode of a diode D1, the cathode of a diode D1 is respectively connected with the anode of a capacitor C1, the second end of a resistor Rsc1 and the VCC end of the switching power supply regulator, and the second end of the first output winding is respectively connected with the cathode of the capacitor C1, the cathode of a capacitor C2 and the ground; the first end of the second output winding is connected with the anode of a diode D2, and the cathode of a diode D2 is respectively connected with the first end of the coil of the inductor L2 and the anode of the capacitor C2; the second end of the second output winding is grounded. The positive pole and the negative pole of the load are respectively connected with the positive pole and the negative pole of the capacitor C2, namely the voltage VC2 is connected with the positive pole of the load, and the negative pole of the load is grounded.
In this embodiment, the output voltage of the first output winding is a voltage VC1, the output voltage of the second output winding is a voltage VC2, the voltage VC1 or the voltage VC2 is provided for a power supply terminal of the secondary voltage feedback circuit, and an output terminal of the secondary voltage feedback circuit is connected to a driving terminal of the primary driving protection circuit, so that the voltages of the first output winding and the second output winding are established after the secondary voltage feedback circuit detects the voltage VC1 or the voltage VC 2. The primary driving protection circuit is a conventional switching power supply primary driving protection circuit, and the secondary voltage feedback circuit is a conventional switching power supply secondary voltage feedback circuit, so that the description is not repeated.
Further, the present invention can be set to two modes, a voltage VC1 boosting mode and a voltage VC1 dropping mode, which are selected according to practical situations and are not limited herein. The switching power supply regulator adopts a 34063 module type regulator, an SC end and an SE end of the switching power supply regulator are an SC input end and an SE output end, and a conventional semiconductor switch is connected between the SC end and the SE end in the switching power supply regulator.
In the first mode (boost mode), the value of the voltage VC1 is smaller than the value of the voltage VC2, and the connection circuit of the voltage regulation circuit is: the SC end of the switching power supply regulator is respectively connected with the second end of the coil of the inductor L1 and the anode of the diode D4; the cathode of the diode D4 is respectively connected with the second end of the resistor R2, the anode of the capacitor C4 and the second end of the coil of the inductor L2; the negative electrode of the capacitor C4 is grounded, the first end of the resistor R2 is respectively connected with the VF end of the switching power supply regulator and the first end of the resistor R3, and the second end of the resistor R3 is grounded. The DC end of the switching power supply regulator is connected with the second end of the resistor R1, and the first end of the resistor R1 is respectively connected with the first end of the coil of the inductor L1, the IPK end of the switching power supply regulator and the first end of the resistor Rsc 1; a second terminal of the resistor Rsc1 is connected to the VCC terminal of the switching power supply regulator and the cathode of the diode D1, respectively.
When a semiconductor switch in the switching power supply regulator is switched on, the voltage VC1 output by the first output winding sequentially passes through a resistor Rsc1, an inductor L1, the semiconductor switch and an SE end and then reaches a ground end, in the process, the inductor L1 stores energy and induces voltage VL1 at two ends of the inductor L1; the semiconductor switch is controlled to be turned off by the switching power supply regulator, due to a sudden change suppression mechanism of the inductor L1 on current, at the moment, a circuit circulation loop is changed into a voltage VC1 output by the first output winding, the voltage VC1 sequentially passes through the resistor Rsc1, the inductor L1 and the diode D4, and finally the capacitor C4 is charged, the charging voltage is VC1+ voltage VL1, the charging voltage is larger than the voltage VC1 output by the first output winding, so that the voltage VC1 output by the first output winding is boosted in the repeated process of once opening and once breaking of the semiconductor switch, the value of the boosted voltage VC1 is finally stabilized to be close to or equal to the value of the voltage VC2, and then the boosted voltage VC1 and the voltage VC2 output by the second output winding jointly supply power to a load to drive the load to operate.
In the second mode (buck mode), the voltage VC1 is greater than the voltage VC2, and the connection circuit of the voltage regulator circuit is: the SC end of the switching power supply regulator is respectively connected with the IPK end of the switching power supply regulator, the first end of a resistor R1 and the first end of a resistor Rsc1, the second end of a resistor R1 is connected with the DC end of the switching power supply regulator, and the second end of a resistor Rsc1 is respectively connected with the cathode of a diode D1 and the VCC end of the switching power supply regulator; the SE end of the switching power supply regulator is respectively connected with the cathode of the diode D4 and the first end of the coil of the inductor L1, the anode of the diode D4 is grounded, the second end of the coil of the inductor L1 is respectively connected with the second end of the resistor R2, the anode of the capacitor C4 and the second end of the coil of the inductor L2, the first end of the resistor R2 is respectively connected with the VF end of the switching power supply regulator and the first end of the resistor R3, and the cathode of the capacitor C4 and the second end of the resistor R3 are both grounded.
When a semiconductor switch in the switching power supply regulator is switched on, a voltage VC1 output by the first output winding sequentially passes through a resistor Rsc1, an SC end of the switching power supply regulator and an SE end of the switching power supply regulator, then passes through an inductor L1, and finally charges a capacitor C4, wherein in the switching-on period of the semiconductor switch, the inductor L1 stores energy, and a voltage VL1 is induced at two ends of an inductor L1; when the semiconductor switch is controlled to be turned off, the current mutation is restrained by the inductor, and at the moment, a circuit circulation loop is changed into a loop formed by voltage VL1 passing through a capacitor C4 and a diode D4; therefore, chopping voltage reduction is realized in the repeated switching-on and switching-off of the semiconductor switch, so that the value of the voltage VC1 output by the first output winding is stabilized to be close to or the same as the value of the voltage VC2 after the voltage VC1 passes through the voltage regulating circuit, and then the voltage VC1 subjected to voltage reduction and the voltage VC2 output by the second output winding supply power to the load together to drive the load to operate.
On the premise of heavier load and insufficient driving force, the frequency converter switching power supply with the voltage regulating circuit boosts or reduces the voltage VC1 output by the first output winding through the arrangement of the switching power supply regulator, the inductor L1 and the inductor L2, so that the value of the boosted or reduced voltage VC1 is close to or the same as the value of the voltage VC2 output by the second output winding, and the two are used for supplying power to the load together to provide enough driving force for the load to enable the load to operate.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.
Claims (6)
1. A frequency converter switching power supply with a voltage regulation circuit, characterized in that: the power supply comprises a frequency conversion circuit, a transformer circuit and a voltage regulation circuit, wherein the transformer circuit is used for converting a power supply output by the frequency conversion circuit and outputting a voltage VC1 and a voltage VC2, and the voltage regulation circuit is used for boosting or reducing the voltage VC1 so that the value of the voltage VC1 is close to or the same as that of the voltage VC 2; the frequency conversion circuit comprises a rectifying unit, a charging buffer unit and a filtering unit which are sequentially connected, and the voltage regulating circuit comprises a switching power supply regulator, an inductor L1 and an inductor L2; the power output end of the filtering unit is connected with the power input end of the transformer circuit, the first output winding of the transformer circuit is connected with the switching power supply regulator through the inductor L1, and the second output winding of the transformer circuit is connected with the switching power supply regulator through the inductor L2.
2. The inverter switching power supply with the voltage regulation circuit according to claim 1, wherein: the transformer circuit comprises a switching transformer comprising a first input winding, a second input winding, the first output winding, and the second output winding;
the first end of the first input winding is respectively connected with the first end of a resistor R5 and the anode of the power supply, the second end of the first input winding is connected with the driving end of a primary drive protection circuit, the first end of the second input winding is connected with the anode of a diode D3, and the cathode of the diode D3 is respectively connected with the anode of a capacitor C3 and the power supply end of the primary drive protection circuit; a second end of the second input winding is respectively connected with a negative electrode of the capacitor C3, a power grounding end of the primary drive protection circuit and a negative electrode of the power supply; the first end of the first output winding is connected with the anode of a diode D1, and the cathode of the diode D1 is respectively connected with the anode of a capacitor C1, the second end of a resistor Rsc1 and the VCC end of the switching power supply regulator; the second end of the first output winding is respectively connected with the negative electrode of the capacitor C1 and the grounding end; the first end of the second output winding is connected with the anode of a diode D2, the cathode of the diode D2 is respectively connected with the anode of the capacitor C2 and the first end of the coil of the inductor L2, and the second end of the second output winding is respectively connected with the cathode of the capacitor C2 and the ground terminal.
3. The inverter switching power supply with the voltage regulation circuit according to claim 2, wherein: the output voltage of the first output winding is the voltage VC1, the output voltage of the second output winding is the voltage VC2, the voltage VC1 and the voltage VC2 are both connected with the detection input end of a secondary voltage feedback circuit, and the output end of the secondary voltage feedback circuit is connected with the driving end of the primary driving protection circuit.
4. The inverter switching power supply with voltage regulation circuit of claim 3, wherein: when the voltage VC1 is less than the voltage VC2, the SC end of the switching power supply regulator is divided into two paths, one path is connected to the second end of the coil of the inductor L1, and the other path is connected to the anode of the diode D4; the cathode of the diode D4 is connected to the second terminal of the resistor R2, the anode of the capacitor C4, and the second terminal of the inductor L2, respectively, the cathode of the capacitor C4 is grounded, and the first terminal of the resistor R2 is connected to the VF terminal of the switching power supply regulator and grounded through the resistor R3, respectively; a first end of a coil of the inductor L1 is connected to a first end of a resistor R1, a first end of the resistor Rsc1 and an IPK end of the switching power supply regulator, respectively, a second end of the resistor R1 is connected to a DC end of the switching power supply regulator, and an SE end of the switching power supply regulator is grounded.
5. The inverter switching power supply with voltage regulation circuit of claim 3, wherein: when the voltage VC1 is greater than the voltage VC2, the SC end of the switching power supply regulator is connected to the first end of the resistor R2, the IPK end of the switching power supply regulator, and the first end of the resistor Rsc1, respectively; the SE end of the switching power supply regulator is respectively connected with the cathode of a diode D4 and the first end of the coil of an inductor L1, the anode of the diode D4 is grounded, the second end of the coil of the inductor L1 is respectively connected with the second end of a resistor R2, the anode of a capacitor C4 and the second end of the coil of the inductor L2, the first end of the resistor R2 is respectively connected with the VF end of the switching power supply regulator and is grounded through the resistor R3, and the cathode of the capacitor C4 is grounded.
6. The inverter switching power supply with the voltage regulation circuit according to claim 4 or 5, wherein: the switching power supply regulator is a regulator adopting a 34063 module, the SC end of the switching power supply regulator is an SC input end, the SE end is an SE output end, and the interior of the switching power supply regulator is connected with a semiconductor switch corresponding to the SC end and the SE end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121503875.5U CN215871222U (en) | 2021-07-02 | 2021-07-02 | Frequency converter switching power supply with voltage regulating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121503875.5U CN215871222U (en) | 2021-07-02 | 2021-07-02 | Frequency converter switching power supply with voltage regulating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215871222U true CN215871222U (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121503875.5U Active CN215871222U (en) | 2021-07-02 | 2021-07-02 | Frequency converter switching power supply with voltage regulating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215871222U (en) |
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2021
- 2021-07-02 CN CN202121503875.5U patent/CN215871222U/en active Active
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