CN210380656U - Energy recovery circuit, module, system and switching power supply - Google Patents
Energy recovery circuit, module, system and switching power supply Download PDFInfo
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- CN210380656U CN210380656U CN201921257421.7U CN201921257421U CN210380656U CN 210380656 U CN210380656 U CN 210380656U CN 201921257421 U CN201921257421 U CN 201921257421U CN 210380656 U CN210380656 U CN 210380656U
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Abstract
An energy recovery circuit, module, system and switching power supply having a magnetic energy storage unit comprising: the energy recovery circuit comprises two parts, the first part is that charging current flows to the ground through the first switch tube and the first capacitor, the second part is that the charging current flows to the ground through the first switch tube and the first power tube, and energy recovery of the charging current of the magnetic energy storage unit is realized through energy storage of the first capacitor. By recycling the charging current of the magnetic energy storage unit, the energy is saved, the cost is reduced, and the overall efficiency of the system is improved.
Description
Technical Field
The utility model relates to an integrated circuit technical field relates to an energy recuperation circuit very much to and the switching power supply device who has adopted this energy recuperation circuit.
Background
The switching power supply converts an input signal into an output signal through the on and off of the switching tube. Generally, a switching power supply uses a control chip to control the on and off of a switching tube, and the control chip needs a dc voltage for power supply.
Fig. 1A shows a conventional switching power supply circuit, in which an input voltage source (generally including a rectifier, a filter circuit, etc.) outputs an uncontrolled dc bus voltage Vbus, when a switching tube MP is turned on, a charging current of the Vbus voltage to a main pole inductor LP of a transformer T1 flows through LP and the switching tube MP to GND, and when M1 is turned off, the transformer T1 flyback energy in the main pole inductor LP to a secondary LS and transfers the energy to a load, so as to provide a required voltage or current to the load.
Fig. 1B shows another conventional switching power supply circuit, in which an input voltage source (generally including a rectifier, a filter circuit, etc.) outputs an uncontrolled dc bus voltage Vbus, when a switching tube MP is turned on, a charging current of the inductor LP from the Vbus voltage flows through LP and the switching tube MP to GND, and when M1 is turned off, energy on the inductor LP is freewheeling via a diode D and is transferred to a load, so as to provide a required voltage or current to the load.
The charging current of the transformer or the inductor of the two traditional switching power supply circuits directly flows to the GND without being utilized, so that energy waste and efficiency reduction are caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides an energy recuperation circuit to and the switching power supply who has adopted this energy recuperation circuit, through the energy recuperation to the charging current of transformer or inductance, can effectively utilize the resource, promote switching power supply efficiency.
According to the utility model discloses an energy recuperation circuit of embodiment has a magnetism energy storage unit, include: the first switch tube is provided with a first end, a second end and a control end, wherein the first end is electrically coupled to the first end of the magnetic energy storage unit; a first power transistor having a first terminal, a second terminal and a control terminal, wherein the first terminal is electrically coupled to the second terminal of the first switch transistor, and the second terminal is electrically coupled to ground; the energy recovery conversion control circuit is electrically coupled to the control end of the first switch tube and controls the on and off of the first switch tube; the clamping bleeder circuit is electrically coupled to the control end of the first power tube and controls the on and off of the first power tube; and a first capacitor having a first end and a second end, the first end of the first capacitor being electrically coupled to the second end of the first switch tube and the first end of the first power tube, the second end of the first capacitor being electrically coupled to ground; the energy recovery circuit comprises two parts, the first part is that charging current flows to the ground through a first switching tube and a first capacitor, the second part is that the charging current flows to the ground through the first switching tube and a first power tube, and energy recovery of the charging current of the magnetic energy storage unit is realized through energy storage of the first capacitor.
According to the utility model discloses a clamp bleeder circuit has first input, second input and first output, and wherein first input electricity is coupled to the first end of first condenser, and a second input electricity coupling reference voltage, first output electricity are coupled to the control end of first power tube, and through the voltage on the first condenser of proportion sample, will sampling voltage carries out the error comparison with reference voltage and produces error signal, controls the control end of first power tube, realizes the voltage stabilization on the first condenser.
According to the utility model discloses an energy recuperation conversion control circuit has first input, second input and first output, and wherein first input electricity is coupled to the first end of first condenser, and a pulse width modulation signal is coupled to second input electricity, and first output electricity is coupled to the control end of first switch tube, and the high level of the voltage pulse signal of its first output is higher than the level of its first input terminal voltage.
According to the utility model discloses an energy recuperation conversion control circuit of embodiment, include: the power supply conversion circuit is provided with a first input end and a first output end, wherein the first input end is electrically coupled to the first end of the first capacitor, and the first output end is electrically coupled to the first input end of the driving control circuit; and the driving control circuit is provided with a first input end, a second input end and a first output end, wherein the first input end is electrically coupled with the first output end of the power switching circuit, the second input end is electrically coupled with a pulse width modulation signal, and the first output end is electrically coupled with the control end of the first switching tube to control the first switching tube to be switched on and switched off.
According to the utility model discloses an energy recuperation conversion control circuit of embodiment, power conversion circuit is a electric capacity boost circuit or an inductance boost circuit, and the voltage of its first output is higher than the voltage of its first input.
According to the utility model discloses a power supply conversion circuit, electric capacity boost circuit is a 2 times charge pump boost circuit.
According to the utility model discloses a power conversion circuit of embodiment, inductance Boost circuit is a Boost structure Boost circuit.
According to the utility model discloses an energy recuperation module of embodiment, include energy recuperation circuit.
An energy recovery system according to an embodiment of the present invention includes the energy recovery module; the power supply further comprises an auxiliary power supply module, and the auxiliary power supply module converts the energy recovered from the first capacitor to output an auxiliary power supply voltage.
According to the utility model discloses a switching power supply of embodiment, including input circuit, output circuit and load, still including energy recuperation module.
According to the utility model discloses an intelligent control switching power supply of embodiment, including input circuit, output circuit and load, the energy recovery system; the intelligent control module is electrically coupled with the energy recovery system, receives the voltage of the auxiliary power supply for power supply, outputs an intelligent control signal to control the energy recovery system in a feedback mode, and achieves intelligent control of the switching power supply.
According to the utility model relates to an intelligent control module, it is bluetooth module, WIFI module, radar module or infrared module.
The utility model discloses utilize electric capacity to carry out energy recuperation to magnetism energy storage unit charging current, utilize the energy of retrieving to supply power for system self or for other module power supplies, practiced thrift the energy, the cost is reduced has promoted the whole efficiency of system.
Drawings
FIG. 1A is a schematic diagram of a conventional switching power supply circuit;
FIG. 1B is a schematic diagram of a conventional switching power supply circuit;
fig. 2 is a schematic diagram of an energy recovery circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a clamp bleed circuit according to an embodiment of the present invention;
fig. 4A is a schematic diagram of an energy recovery conversion control circuit according to an embodiment of the present invention;
fig. 4B is a schematic diagram of an energy recovery conversion control circuit according to another embodiment of the present invention;
fig. 5 is a schematic diagram of a waveform according to an embodiment of the present invention;
fig. 6 is a switching power supply according to an embodiment of the present invention;
fig. 7 is a diagram of an intelligent switching power supply according to an embodiment of the present invention.
Detailed Description
Specific embodiments of the present invention will be described in detail below, and it should be noted that the embodiments described herein are only for illustration and are not intended to limit the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the invention. In other instances, well-known circuits, materials, or methods have not been described in detail in order to avoid obscuring the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment," "in an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present. Like reference numerals refer to like elements. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Fig. 2 is a schematic circuit diagram of an energy recovery circuit 300 according to an embodiment of the present invention, which has a magnetic energy storage unit L1 (not limited to transformer or inductor), including: a first switch tube SW1 having a first end, a second end and a control end, wherein the first end is electrically coupled to the first end VD1 of the magnetic energy storage unit L1; a first power transistor MD having a first terminal electrically coupled to a second terminal VCC of the first switch transistor SW1 (for convenience of description, the voltage VCC on the capacitor is identical to the first terminal name of the capacitor C2), a second terminal electrically coupled to ground; the energy recovery conversion control circuit 310 is electrically coupled to the control end G1 of the first switch tube SW1 and controls the on/off of the first switch tube SW 1; the clamp bleeder circuit 320 is electrically coupled to the control terminal G2 of the first power tube MD and controls the on and off of the first power tube MD; and a first capacitor C2 having a first terminal electrically coupled to the second terminal of the first switch tube SW1 and the first terminal VCC of the first power tube MD and a second terminal electrically coupled to ground; the charging IL of the magnetic energy storage unit L1 by the energy recovery circuit 300 includes two parts, the first part is that the charging current IL flows to the ground through the first switch tube SW1 and the first capacitor C2, the second part is that the charging current IL flows to the ground through the first switch tube SW1 and the first power tube MD, and the energy recovery of the charging current IL of the magnetic energy storage unit L1 is realized through the energy storage of the first capacitor C2.
In one embodiment, a first current detecting resistor is connected in series between the first switch tube SW1 and the first power tube MD for detecting the current flowing through the first switch tube.
In one embodiment, the second end of the first power tube is electrically coupled to ground through a second current detection resistor for detecting the current flowing through the first power tube MD.
Fig. 3 is a clamp bleeder circuit 320 according to an embodiment of the present invention, which has a first input terminal, a second input terminal and a first output terminal, wherein the first input terminal is electrically coupled to the first terminal VCC of the first capacitor C2, the second input terminal is electrically coupled to a reference voltage VREF, the first output terminal is electrically coupled to the control terminal G2 of the first power transistor MD, the clamp bleeder circuit 320 performs error comparison between the sampling voltage K × VCC and the reference voltage VREF to generate an error signal G2 by proportionally sampling (the proportionality coefficient is K, K is a constant) the voltage VCC on the first capacitor C2, and controls the control terminal G2 of the first power transistor MD to stabilize the voltage VCC on the first capacitor C2; when the sampling voltage K × VCC is smaller than the reference voltage VREF, the error signal G2 turns off the first power tube MD, the first capacitor C2 starts charging for energy recovery, and the VCC voltage rises; when the sampling voltage K × VCC is greater than the reference voltage VREF, the error signal G2 turns on the first power transistor MD, discharges the extra energy, and keeps the voltage VCC on the first capacitor C2 at the set value of the reference voltage VREF, that is: k VCC — VREF.
Fig. 4A is an energy recovery conversion control circuit 410 according to an embodiment of the present invention, which has a first input terminal, a second input terminal and a first output terminal, wherein the first input terminal is electrically coupled to the first terminal VCC of the first capacitor C2, the second input terminal is electrically coupled to a pwm signal, the first output terminal is electrically coupled to the control terminal G1 of the first switch SW1, including: a power conversion circuit 411 having a first input terminal and a first output terminal, wherein the first input terminal is electrically coupled to the first terminal VCC of the first capacitor C2, and the first output terminal is electrically coupled to the first input terminal VCCH of the driving control circuit; a drive control circuit 412; the switch circuit has a first input terminal electrically coupled to the first output terminal VCCH of the power switching circuit 411, a second input terminal electrically coupled to a PWM signal (pulse width modulation signal), and a first output terminal G1 electrically coupled to the control terminal of the first switch transistor, which controls the first switch transistor SW1 to turn on or off.
In one embodiment, the energy recovery conversion control circuit 310 has a first input terminal VCC, a second input terminal PWM, and a first output terminal G1, wherein the first input terminal is electrically coupled to the first terminal of the first capacitor VCC, the second input terminal is electrically coupled to a pulse width modulation signal, the first output terminal is electrically coupled to the control terminal G1 of the first switch tube, the high level of the voltage pulse signal G1 output by the first output terminal thereof is higher than the level of the voltage VCC at the first input terminal thereof, in one embodiment, the low level of the voltage pulse signal output by the G1 is VCC, and the high level VCCH is VCC + 5V; in another embodiment, the low level of the voltage pulse output by G1 is zero voltage, and the high level is VCCH ═ VCC + 5V; therefore, when the voltage pulse signal G1 is at a high level, a positive voltage difference exists between the control terminal G1 and the second terminal VCC of the first switch SW1, so that the first switch SW1 can be turned on, and the charging current IL of the magnetic energy storage unit L1 charges the first capacitor C2.
According to the utility model discloses an energy recuperation conversion control circuit 410 of embodiment, power conversion circuit is a electric capacity boost circuit 411 or an inductance boost circuit 421, and power conversion circuit realizes that the voltage VCCH of its first output is higher than the voltage VCC of its first input through the conversion that steps up to its input voltage.
Fig. 4A is a power conversion circuit 411 according to an embodiment of the present invention, wherein the capacitor boosting circuit is a 2-time charge pump boosting circuit, and includes switches SP1, SP2, diodes DP1, DP2, capacitor CP1 and CO1, wherein the diodes DP1 and DP2 can also be replaced by switches similar to SP1 and SP 2.
Fig. 4B is a power conversion circuit 421 according to an embodiment of the present invention, the inductance Boost circuit is a Boost structure Boost circuit, and includes an inductance LB1, a switch MB1, a diode DB1, and a capacitor CB 1.
Fig. 5 is a schematic diagram of a waveform of an energy recovery circuit 300 according to an embodiment of the present invention, in a stage T1, a voltage at a control terminal G1 of the first switch is lower than or equal to a voltage VCC across a first capacitor C2, a SW1 is kept in an off state, a magnetic energy storage unit L1 is not charged, and a first terminal voltage VD1 of the first switch tube is kept at a high level in this stage; in a stage T2, a high level of voltage at the control terminal G1 of the first switch SW1 is VCCH higher than VCC, the first switch SW1 remains on, the control terminal G2 of the first power tube MD remains at a low level, the first power tube MD remains off, the charging current IL of the magnetic energy storage unit L1 flows to ground through the first switch SW1, and the first capacitor C2 flows to realize energy recovery of the charging current IL of the magnetic energy storage unit L1 through energy storage of the first capacitor C2, at this stage, the level of the first terminal voltage VD1 of the first switch SW1 is close to VCC voltage; at the stage T3, the first switch SW1 is kept turned on, when the clamp bleeder circuit detects that the voltage VCC across the first capacitor C2 reaches the set value of the reference voltage VREF, the clamp bleeder circuit 320 outputs an error signal to raise the voltage of the control terminal G2 of the first power transistor MD, so that the first power transistor MD is kept turned on, and the charging current IL of the magnetic energy storage unit L1 flows to the ground through the first switch SW1 and the first power transistor MD; in one embodiment, there are only two states T1 and T2, that is, during the charging process of the magnetic energy storage unit L1 by the energy recovery circuit 300, or the first capacitor C2 just starts the charging stage, the clamp bleeder circuit 320 detects that the voltage VCC across the first capacitor C2 cannot reach the reference voltage VREF setting value all the time, the clamp bleeder circuit 320 outputs an error signal not to raise the voltage of the control terminal G2 of the first power tube MD, and not to keep the first power tube MD on, the magnetic energy storage unit L1 charging current IL charges the first capacitor C2 throughout the charging stage, the charging current IL flows to the ground through the first switch tube SW1, and the first capacitor C2 flows to the ground, so the T3 stage does not occur.
Fig. 6 shows a switching power supply 700 according to an embodiment of the present invention, which includes an input circuit, an output circuit, and a load, and further includes the energy recovery module 711.
Fig. 7 illustrates an intelligent switching power supply 800 and an energy recovery system 810 in accordance with an embodiment of the present invention.
Energy recovery system 810 includes said energy recovery module 811; an auxiliary power module 812 is further included, and the auxiliary power module 812 is electrically coupled to the first capacitor C2 for converting the energy recovered by the first capacitor C2 to output an auxiliary power voltage VCCL.
The intelligent control switching power supply 800 comprises an input circuit, an output circuit and a load, and an energy recovery system 810; the intelligent control module 821 is electrically coupled with the energy recovery system 810, receives the auxiliary power supply voltage VCCL for power supply, and outputs an intelligent control signal DCTL for feedback control of the energy recovery system 810, so as to realize intelligent control of the switching power supply.
According to the utility model discloses an intelligent control module 821 of embodiment, it is for but not limiting to bluetooth module, the WIFI module, radar module, infrared module, external control radio frequency signal can be received to intelligent module, and output digital control signal control energy recuperation system realizes long-range wireless intelligent control.
While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims. For those skilled in the art, without departing from the principle of the present invention, several improvements and decorations can be made, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An energy recovery circuit having a magnetic energy storage unit, comprising:
the first switch tube is provided with a first end, a second end and a control end, wherein the first end is electrically coupled to the first end of the magnetic energy storage unit;
a first power transistor having a first terminal, a second terminal and a control terminal, wherein the first terminal is electrically coupled to the second terminal of the first switch transistor, and the second terminal is electrically coupled to ground;
the energy recovery conversion control circuit is electrically coupled to the control end of the first switch tube and controls the on and off of the first switch tube;
the clamping bleeder circuit is electrically coupled to the control end of the first power tube and controls the on and off of the first power tube; and
a first capacitor having a first end and a second end, the first end of the first capacitor being electrically coupled to the second end of the first switch tube and the first end of the first power tube, the second end of the first capacitor being electrically coupled to ground; wherein
The energy recovery circuit comprises two parts, the first part is that the charging current flows to the ground through the first switching tube and the first capacitor, the second part is that the charging current flows to the ground through the first switching tube and the first power tube, and the energy recovery of the charging current of the magnetic energy storage unit is realized through the energy storage of the first capacitor.
2. The energy recovery circuit of claim 1, having a first input terminal electrically coupled to the first terminal of the first capacitor, a second input terminal electrically coupled to a reference voltage, and a first output terminal electrically coupled to the control terminal of the first power transistor, wherein the voltage on the first capacitor is proportionally sampled, and the sampled voltage is error-compared with the reference voltage to generate an error signal, so as to control the control terminal of the first power transistor, thereby achieving voltage stabilization on the first capacitor.
3. The energy recovery circuit of claim 1, having a first input terminal electrically coupled to the first terminal of the first capacitor, a second input terminal electrically coupled to a pulse width modulation signal, and a first output terminal electrically coupled to the control terminal of the first switch tube, wherein the first output terminal outputs a voltage pulse signal having a higher high level than the voltage at the first input terminal.
4. The energy recovery circuit of claim 3, comprising:
the power supply conversion circuit is provided with a first input end and a first output end, wherein the first input end is electrically coupled to the first end of the first capacitor, and the first output end is electrically coupled to the first input end of the driving control circuit;
and the driving control circuit is provided with a first input end, a second input end and a first output end, wherein the first input end is electrically coupled with the first output end of the power switching circuit, the second input end is electrically coupled with a pulse width modulation signal, and the first output end is electrically coupled with the control end of the first switching tube to control the first switching tube to be switched on and switched off.
5. The energy recovery circuit of claim 4 wherein the power conversion circuit is a capacitor boost circuit or an inductor boost circuit, and the voltage at the first output terminal is higher than the voltage at the first input terminal.
6. An energy recovery module comprising an energy recovery circuit according to any one of claims 1 to 5.
7. An energy recovery system comprising the energy recovery module of claim 6; the power supply further comprises an auxiliary power supply module, and the auxiliary power supply module converts the energy recovered from the first capacitor to output an auxiliary power supply voltage.
8. A switching power supply comprising an input circuit, an output circuit and a load, further comprising an energy recovery module according to claim 7.
9. An intelligent control switching power supply comprising an input circuit, an output circuit and a load, comprising the energy recovery system of claim 7; the intelligent control module is electrically coupled with the energy recovery system, receives the voltage of the auxiliary power supply for power supply, outputs an intelligent control signal to control the energy recovery system in a feedback mode, and achieves intelligent control of the switching power supply.
10. The intelligent control switching power supply according to claim 9, comprising a bluetooth module, a WIFI module, a radar module, or an infrared module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921257421.7U CN210380656U (en) | 2019-08-05 | 2019-08-05 | Energy recovery circuit, module, system and switching power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921257421.7U CN210380656U (en) | 2019-08-05 | 2019-08-05 | Energy recovery circuit, module, system and switching power supply |
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| CN210380656U true CN210380656U (en) | 2020-04-21 |
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| CN201921257421.7U Active CN210380656U (en) | 2019-08-05 | 2019-08-05 | Energy recovery circuit, module, system and switching power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116232011A (en) * | 2023-03-07 | 2023-06-06 | 禹创半导体(深圳)有限公司 | Voltage conversion device with energy recovery mechanism and power supply chip |
-
2019
- 2019-08-05 CN CN201921257421.7U patent/CN210380656U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116232011A (en) * | 2023-03-07 | 2023-06-06 | 禹创半导体(深圳)有限公司 | Voltage conversion device with energy recovery mechanism and power supply chip |
| CN116232011B (en) * | 2023-03-07 | 2024-01-26 | 禹创半导体(深圳)有限公司 | Voltage conversion device with energy recovery mechanism and power supply chip |
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Effective date of registration: 20211022 Address after: 610000 room 1009, floor 10, unit 1, building 2, No. 68, Zhiquan section, East Street, Jinjiang District, Chengdu, Sichuan Patentee after: Chengdu Zhongqi Yilian Technology Co.,Ltd. Address before: No.2126 and 2127, 21 / F, building 1, No.56, Tianhui middle street, hi tech Zone, Chengdu, Sichuan Province 610000 Patentee before: Xinhao semiconductor (Chengdu) Co.,Ltd. |
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