CN214506885U

CN214506885U - One drags power drive circuit of many outputs

Info

Publication number: CN214506885U
Application number: CN202120602295.5U
Authority: CN
Inventors: 胡志
Original assignee: Zhongshan Aita Electrical Appliance Technology Co ltd
Current assignee: Zhongshan Aita Electrical Appliance Technology Co ltd
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2021-10-26
Anticipated expiration: 2031-03-24

Abstract

The utility model discloses a power drive circuit of one drags many outputs, including the step-down module, contravariant module and transformer module, the output of step-down module is connected with the input of contravariant module, transformer module includes first primary winding and a plurality of and the first secondary winding of first primary winding coupling, the output and the first primary winding of contravariant module are connected, because the voltage of inputing in the transformer module has been through step-down processing, the turn ratio of first primary winding and first secondary winding can reduce correspondingly in the transformer module that corresponds, thereby can choose the less transformer module of volume for use, be convenient for the overall arrangement of circuit element on the circuit board, reduce off-the-shelf volume.

Description

One drags power drive circuit of many outputs

Technical Field

The utility model relates to an electronic circuit technical field, in particular to one drags power drive circuit of many outputs.

Background

The traditional one-driving-multiple power supply driving circuit generally adopts a switching power supply circuit, the switching power supply circuit comprises a switching power supply chip, a switching tube and a transformer, the transformer comprises a primary winding and a plurality of secondary windings coupled with the primary winding, the switching power supply chip controls the operation of the switching tube to adjust the input voltage of the primary winding, and aiming at the scheme of high-voltage input and low-voltage multiple output, the turn ratio of the primary winding and the secondary winding of the transformer needs to be matched with the high-voltage input and low-voltage multiple output, so that the transformer has larger volume, is inconvenient for element layout and cannot meet the production requirement of a circuit board.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a power drive circuit of one drags many outputs, each component overall arrangement of being convenient for satisfies circuit board production requirement.

According to the utility model discloses a power drive circuit of one drags many outputs of first aspect embodiment, include: a voltage reduction module; the output end of the voltage reduction module is connected with the input end of the inversion module; and the transformer module comprises a first primary winding and a plurality of first secondary windings coupled with the first primary winding, and the output end of the inversion module is connected with the first primary winding.

According to the utility model discloses a power drive circuit of one drags many outputs has following beneficial effect at least:

the utility model discloses a drag power drive circuit of many outputs, the step-down module carries out step-down processing to outside input voltage earlier, the contravariant module is again handled the input voltage contravariant after stepping down, form in the alternating current inputs the transformer module, finally trun into multiplexed output, and because the voltage of input to in the transformer module has been through step-down processing, the turn ratio of first primary winding and first secondary winding can reduce correspondingly in the transformer module that corresponds, thereby can choose the less transformer module of volume for use, the overall arrangement of the circuit element on the circuit board of being convenient for, reduce off-the-shelf volume.

According to some embodiments of the present invention, the secondary winding further comprises a plurality of first rectifying units, wherein the first rectifying units are connected to the first secondary winding in a one-to-one correspondence.

According to some embodiments of the utility model, step-down module is resistance-capacitance step-down module or switching power supply module.

According to some embodiments of the utility model, the step-down module is the switching power supply module, the switching power supply module includes power control unit, switch element, second rectifier unit and transformer unit, the transformer unit includes intercouple's second primary winding and second secondary winding, switch element's input with the one end of second primary winding is connected, switch element's output ground connection, switch element's controlled end with power control unit connects, the one end of second secondary winding with the input of second rectifier unit is connected, the other end ground connection of second secondary winding, the output of second rectifier unit with the input of contravariant module is connected.

According to the utility model discloses a some embodiments, switching power supply module still includes the voltage feedback unit, the sample terminal of voltage feedback unit respectively with the output of second rectification unit and the input of contravariant module is connected, the output of voltage feedback unit with the power control unit is connected.

According to the utility model discloses a some embodiments, switching power supply module still includes the current feedback unit, the output of switching unit passes through current feedback unit ground connection, the output of current feedback unit with the power control unit is connected.

According to some embodiments of the present invention, the transformer unit further comprises a power supply winding, the power supply winding is connected to the second primary winding, and the power supply winding is connected to the power control unit for supplying power.

According to the utility model discloses a some embodiments, the contravariant module includes drive control unit and contravariant unit, the input of contravariant unit with the output of step-down module is connected, drive control unit with the controlled end of contravariant unit is connected with control the contravariant unit changes the direct current into the alternating current, the output of contravariant unit with first primary winding connects.

According to some embodiments of the utility model, the contravariant module still includes the third rectification unit, the input of third rectification unit with the output of step-down module is connected, the output of third rectification unit with the drive control unit is connected with the power supply.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic block diagram of one embodiment of the power driving circuit of the present invention;

FIG. 2 is a circuit schematic of the voltage step-down module;

FIG. 3 is a schematic circuit diagram of an inverter module;

fig. 4 is a circuit schematic of the first secondary winding of the transformer module.

Reference numerals:

the voltage-reducing module 100, the power control unit 110, the switching unit 120, the second rectifying unit 130, the transformer unit 140, the second primary winding 141, the second secondary winding 142, the power supply winding 143, the voltage feedback unit 150, the current feedback unit 160, the inverter module 200, the driving control unit 210, the inverter unit 220, the third rectifying unit 230, the transformer module 300, the first primary winding 310, the first secondary winding 320, and the first rectifying unit 330.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the orientation description, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., is the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplicity of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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 in specific cases to those skilled in the art.

As shown in fig. 1-4, a power driving circuit with multi-split output according to an embodiment of the present invention includes a voltage-reducing module 100, an inverter module 200 and a transformer module 300, wherein an output end of the voltage-reducing module 100 is connected to an input end of the inverter module 200, the transformer module 300 includes a first primary winding 310 and a plurality of first secondary windings 320 coupled to the first primary winding 310, and an output end of the inverter module 200 is connected to the first primary winding 310.

The utility model discloses a power drive circuit who drags many outputs, step-down module 100 carries out step-down processing to outside input voltage earlier, contravariant module 200 is again handled the input voltage contravariant after stepping down, form in the alternating current inputs transformer module 300, finally trun into multiplexed output, for example, step-down module 100 can insert 300V power input, step-down module 100 changes the 300V power into 16V, contravariant module 200 changes 16V into the alternating current, input to transformer module 300, change multichannel 15V's output into through the vary voltage.

Since the voltage inputted into the transformer module 300 is stepped down, the turn ratio of the first primary winding 310 to the first secondary winding 320 in the corresponding transformer module 300 can be correspondingly reduced, so that the transformer module 300 with a smaller volume can be selected, the layout of circuit elements on a circuit board is facilitated, and the volume of a finished product is reduced.

In some embodiments of the present invention, as shown in fig. 4, the first rectifying unit 330 is further included, the first rectifying unit 330 is connected to the first secondary winding 320 in a one-to-one correspondence, and after the voltage is output from the first secondary winding 320, the voltage is rectified and stabilized by the first rectifying unit 330, and then output is performed.

In some embodiments of the present invention, the voltage reduction module 100 is a resistance-capacitance voltage reduction module 100 or a switching power supply module, so that the high voltage can be stably reduced to a desired range.

In some embodiments of the present invention, as shown in fig. 2, the voltage reduction module 100 is a switching power supply module, the switching power supply module includes a power control unit 110, a switching unit 120, a second rectification unit 130 and a transformer unit 140, the transformer unit 140 includes a second primary winding 141 and a second secondary winding 142 coupled to each other, an input end of the switching unit 120 is connected to one end of the second primary winding 141, an output end of the switching unit 120 is grounded, a controlled end of the switching unit 120 is connected to the power control unit 110, one end of the second secondary winding 142 is connected to an input end of the second rectification unit 130, the other end of the second secondary winding 142 is grounded, and an output end of the second rectification unit 130 is connected to an input end of the inversion module 200.

The power control unit 110 may be a conventional switching power control chip, the switching unit 120 may be selected from a transistor, an MOS transistor, or a thyristor, and the like, the power control unit 110 controls on/off of the switching unit 120, so as to adjust an input voltage of the second primary winding 141 inputted to the transformer unit 140, thereby controlling an output voltage of the second secondary winding 142, and the second rectifying unit 130 may employ a diode D24, may rectify an output voltage of the second secondary set and provide the rectified output voltage to the inverter module 200 for processing, and simultaneously, by using a one-way conductivity of the diode D24, prevents mutual interference between the transformer module 300 and the transformer unit 140, so that the circuit operates stably.

It should be noted that although the step-down module 100 utilizes the switching power supply module and needs to set a transformer unit 140 to cooperate with step-down, the volume of the combination of the transformer unit 140 and the transformer module 300 may be larger than the volume of a transformer in the conventional scheme of utilizing a transformer to step down a high voltage input to a plurality of low voltage outputs, no matter the transformer unit 140 or the transformer module 300 is compared with a transformer in the conventional scheme of utilizing a transformer to step down a high voltage input to a plurality of low voltage outputs, the volume is smaller, so that flexible operation on the layout of the circuit board is possible, and the occupied position of the component on the circuit board is more reasonable.

The utility model discloses an in some embodiments, the switching power supply module still includes voltage feedback unit 150, voltage feedback unit 150's sampling end is connected with the output of second rectification unit 130 and the input of contravariant module 200 respectively, voltage feedback unit 150's output is connected with power control unit 110, specifically, voltage feedback unit 150 can adopt resistance partial pressure detection circuitry or integrated voltage detection chip, through voltage feedback control, accurate control output voltage for power drive circuit whole output is stable.

The utility model discloses an in some embodiments, the switching power supply module still includes current feedback unit 160, current feedback unit 160 ground connection is passed through to switching unit 120's output, current feedback unit 160's output and power control unit 110 are connected, specifically, current feedback unit 160 can adopt sampling resistance Rcs, the electric current is behind switching unit 120, ground connection behind sampling resistance Rcs, one end department that deviates from ground connection at sampling resistance Rcs forms the terminal voltage, feed back to power control unit 110, according to current feedback signal, with voltage feedback signal's cooperation, control switch unit 120 moves, make output voltage accurate, and is stable.

In some embodiments of the present invention, as shown in fig. 2, the transformer unit 140 further includes a power supply winding 143, the power supply winding 143 is connected to the second primary winding 141, the power supply winding 143 is connected to the power control unit 110 for supplying power, the power control unit 110 controls the switch unit 120 to operate stably, and the power supply winding 143 is reused to generate stable power supply voltage for supplying power to the power control unit 110.

In some embodiments of the present invention, as shown in fig. 3, the inverter module 200 includes a driving control unit 210 and an inverter unit 220, an input end of the inverter unit 220 is connected to an output end of the voltage-reducing module 100, the driving control unit 210 is connected to a controlled end of the inverter unit 220 to control the inverter unit 220 to convert a direct current into an alternating current, and an output end of the inverter unit 220 is connected to the first primary winding 310.

Specifically, the driving control unit 210 can be selected from a conventional control chip capable of outputting a control instruction, the inverter unit 220 can adopt an integrated inverter chip or an H-shaped inverter circuit composed of four switching tubes, the driving control unit 210 controls the inverter unit 220 to invert an input direct current to form an alternating current, and the control is flexible and stable by controlling the on-frequency of the switching tubes to adjust the output voltage of the alternating current and then regulating the voltage and outputting the regulated voltage by matching with the transformer module 300.

Further, the inverter module 200 further includes a third rectifying unit 230, an input end of the third rectifying unit 230 is connected to an output end of the voltage-reducing module 100, an output end of the third rectifying unit 230 is connected to the driving control unit 210 for supplying power, and the third rectifying unit 230 further rectifies and stabilizes the output of the voltage-reducing module 100 to provide a stable power supply voltage for the driving control unit 210.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A multi-split output power driving circuit is characterized by comprising:

a voltage reduction module;

the output end of the voltage reduction module is connected with the input end of the inversion module;

and the transformer module comprises a first primary winding and a plurality of first secondary windings coupled with the first primary winding, and the output end of the inversion module is connected with the first primary winding.

2. The driving circuit of one-driving-multiple-output power supply of claim 1, wherein: the first rectifying units are connected with the first secondary windings in a one-to-one correspondence mode.

3. The driving circuit of one-driving-multiple-output power supply of claim 1, wherein: the voltage reduction module is a resistance-capacitance voltage reduction module or a switching power supply module.

4. The driving circuit of one-driving-multiple-output power supply of claim 1, wherein: the voltage reduction module is a switching power supply module, the switching power supply module comprises a power supply control unit, a switch unit, a second rectification unit and a transformer unit, the transformer unit comprises a second primary winding and a second secondary winding which are coupled with each other, the input end of the switch unit is connected with one end of the second primary winding, the output end of the switch unit is grounded, the controlled end of the switch unit is connected with the power supply control unit, one end of the second secondary winding is connected with the input end of the second rectification unit, the other end of the second secondary winding is grounded, and the output end of the second rectification unit is connected with the input end of the inversion module.

5. The driving circuit of one-driving-multiple-output power supply of claim 4, wherein: the switching power supply module further comprises a voltage feedback unit, a sampling end of the voltage feedback unit is connected with an output end of the second rectifying unit and an input end of the inversion module respectively, and an output end of the voltage feedback unit is connected with the power supply control unit.

6. The driving circuit of one-driving-multiple-output power supply of claim 4, wherein: the switching power supply module further comprises a current feedback unit, the output end of the switching unit is grounded through the current feedback unit, and the output end of the current feedback unit is connected with the power supply control unit.

7. The driving circuit of one-driving-multiple-output power supply of claim 4, wherein: the transformer unit further comprises a power supply winding, the power supply winding is connected with the second primary winding, and the power supply winding is connected with the power supply control unit to supply power.

8. The driving circuit of one-driving-multiple-output power supply of claim 1, wherein: the inversion module comprises a drive control unit and an inversion unit, the input end of the inversion unit is connected with the output end of the voltage reduction module, the drive control unit is connected with the controlled end of the inversion unit to control the inversion unit to convert direct current into alternating current, and the output end of the inversion unit is connected with the first primary winding.

9. The driving circuit of one-to-many output power supply according to claim 8, wherein: the inversion module further comprises a third rectifying unit, the input end of the third rectifying unit is connected with the output end of the voltage reduction module, and the output end of the third rectifying unit is connected with the driving control unit to supply power.