CN107919800B - Boost type zero ripple DC converter - Google Patents
Boost type zero ripple DC converter Download PDFInfo
- Publication number
- CN107919800B CN107919800B CN201610876481.1A CN201610876481A CN107919800B CN 107919800 B CN107919800 B CN 107919800B CN 201610876481 A CN201610876481 A CN 201610876481A CN 107919800 B CN107919800 B CN 107919800B
- Authority
- CN
- China
- Prior art keywords
- ripple
- capacitor
- coil
- power
- rectifying element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/143—Arrangements for reducing ripples from dc input or output using compensating arrangements
Abstract
The invention discloses a boost type zero-ripple direct current converter, which can achieve the characteristic of zero-ripple voltage; the so-called zero ripple voltage represents an extremely low ripple voltage on engineering grounds, close to zero. The boost zero-ripple DC converter comprises an electric energy isolation and conversion unit, a ripple elimination inductor, a power switch, first to fourth capacitors, first and second rectifying elements and an auxiliary inductor. The power isolation and conversion unit comprises a plurality of coils for dividing the boost type zero-ripple DC converter into an input stage and an output stage. The ripple eliminating inductor, the power switch, the first capacitor and the second capacitor are positioned at the input stage and are respectively and electrically connected with the electric energy isolating and converting unit; the third capacitor, the fourth capacitor, the first rectifying element, the second rectifying element and the auxiliary inductor are positioned at the output stage and are electrically connected with the electric energy isolating and converting unit.
Description
Technical Field
The present invention relates to a dc converter, and more particularly, to a boost type zero-ripple dc converter.
Background
With the development of technology, the variety of electronic products, such as notebook computers, mobile communication devices, multimedia players, etc., is increasing, and these electronic products all need to use a power converter to convert an ac power or a dc power into a dc power meeting the requirement and stable, so as to be used as a power source for normal operation.
The conventional boost power converter mainly comprises a controller, a switching element, a diode, an energy storage inductor and a capacitor, and has the characteristics of simple structure and low cost, so the boost power converter is widely used as a power converter of an electronic product.
However, the output power of the conventional boost power converter has high output ripple, which makes the output voltage unstable and may affect the operation of a load connected at the rear end thereof.
Disclosure of Invention
The invention provides a boost type zero-ripple direct current converter which is connected between a power supply and a load. The boost zero-ripple direct current converter comprises an electric energy isolation and conversion unit, a ripple elimination inductor, a power switch, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first rectifying element, a second rectifying element and an auxiliary inductor. The power isolation and conversion unit comprises a plurality of coils for dividing the boost type zero-ripple DC converter into an input stage and an output stage. The input stage is connected to a power supply, and the output stage is connected to a load. The ripple elimination inductor is positioned at the input stage; the power switch is located at the input stage and electrically connected to the power isolation and conversion unit and the ripple elimination inductor. The first capacitor is positioned at the input stage and is electrically connected with the electric energy isolation and conversion unit; the second capacitor is positioned at the input stage and is electrically connected with the electric energy isolation and conversion unit; the third capacitor is positioned at the output stage and is electrically connected with the electric energy isolating and converting unit; the fourth capacitor is located at the output stage and electrically connected to the power isolation and conversion unit. The first rectifying element is positioned at the output stage and is electrically connected with the electric energy isolating and converting unit and the third capacitor; the second rectifying element is positioned at the output stage and is electrically connected with the electric energy isolating and converting unit and the fourth capacitor; the auxiliary inductor is located at the output stage and electrically connected to the power isolation and conversion unit. When the power switch is turned on, the ripple elimination inductor and the auxiliary inductor are matched with the power provided by the distribution power supply, so that the ripple value of the power transmitted to the load is reduced; when the power switch is turned off, the ripple elimination inductor and the auxiliary inductor are also matched with the power provided by the distribution power supply to reduce the ripple value of the power transmitted to the load.
Drawings
Fig. 1 is a circuit diagram of a boost zero-ripple dc converter according to a first embodiment of the invention;
fig. 2 is a schematic diagram illustrating a current path of a boost zero-ripple dc converter in a first operating mode according to a first embodiment of the invention;
fig. 3 is a schematic diagram illustrating a current path of the boost zero-ripple dc converter in the second operating mode according to the first embodiment of the invention;
FIG. 4 is a circuit diagram of a step-up zero-ripple DC converter according to a second embodiment of the present invention;
FIG. 5 is a circuit diagram of a step-up zero-ripple DC converter according to a third embodiment of the present invention;
FIG. 6 is a circuit diagram of a step-up zero-ripple DC converter according to a fourth embodiment of the present invention;
fig. 7 is a circuit diagram of a boost zero-ripple dc converter according to a fifth embodiment of the invention;
fig. 8 is a schematic diagram illustrating a current path of a boost zero-ripple dc converter in a first operating mode according to a fifth embodiment of the present invention; and
fig. 9 is a schematic diagram illustrating a current path of a boost zero-ripple dc converter in a second operating mode according to a fifth embodiment of the invention.
Wherein, the reference numbers:
10 step-up zero ripple DC converter
100 ripple cancellation inductor
110 first rectifying element
112 second rectifying element
120 input stage first rectifying element
122 input stage second rectifying element
C1 first capacitor
C2 second capacitor
C3 third capacitor
C4 fourth capacitor
Co output capacitor
D body diode
La auxiliary inductor
Lm exciting inductor
Q power switch
RL load
TR transformer
TR1 first transformer
TR2 second transformer
Vin power supply
W1 first coil
W2 second coil
W3 third coil
W4 fourth line
Detailed Description
Referring to fig. 1, a circuit diagram of a boost zero-ripple dc converter according to a first embodiment of the invention is shown. The boost zero-ripple dc converter 10 is connected between the power source Vin and the load RL, and includes an energy isolation and conversion unit (not numbered), a ripple cancellation inductor 100, a power switch Q, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first rectifying element 110, a second rectifying element 112, an auxiliary inductor La, and an output capacitor Co.
The power isolation and conversion unit includes a plurality of coils, and the power isolation and conversion unit shown in fig. 1 includes first to fourth coils W1 to W4; the first coil W1 and the second coil W2 are connected in series and located on a side of the boost-type zero-ripple dc converter 10 connected to the power source Vin (hereinafter referred to as an input stage), the third coil W3 and the fourth coil W4 are connected in series and located on a side of the boost-type zero-ripple dc converter connected to the load RL (hereinafter referred to as an output stage), the first coil W1 and the third coil W3 are coupled to form a first transformer TR1, and the second coil W2 and the fourth coil W4 are coupled to form a second transformer TR 2.
The first capacitor C1, the power switch Q, the ripple cancellation inductor 100 and the second capacitor C2 are located at the input stage. One end of the first capacitor C1 is connected to the high-level terminal of the power Vin, and the other end is connected to the end of the first coil W1 not connected to the second coil W2.
As shown in fig. 1, the power switch Q may be, for example, an nmos field effect transistor, but is not limited to this. The drain of the power switch Q is connected between the first winding W1 and the second winding W2, the source is connected to the low level terminal of the power Vin and the end of the second capacitor C2 not connected to the second winding W2, the gate can be connected to a controller (not shown), for example, and the gate can be turned on or off by a control signal outputted from the controller. The drain and the source of the power switch Q may be further connected in parallel with a diode D, which may be, for example, a body diode (body diode) of the power switch Q.
The ripple cancellation inductor 100 has one end connected to the high-level end of the power Vin, and the other end connected between the first winding W1 and the second winding W2 and the drain of the power switch Q.
One end of the second capacitor C2 is connected to the end of the second coil W2 not connected to the first coil W1, and the other end is connected to the low-level end of the power Vin and the source of the power switch Q.
The third capacitor C3, the fourth capacitor C4, the first rectifying element 110, the second rectifying element 112, the auxiliary inductor La and the output capacitor Co are located at the output stage. One end of the third capacitor C3 is connected to the end of the third coil W3 that is not connected to the fourth coil W4, and the other end is connected to the cathode of the first rectifying element 110 and one end of the auxiliary inductor La. One end of the fourth capacitor C4 is connected to the end of the fourth coil W4 not connected to the third coil W3, and the other end is connected to the anode of the second rectifying element 112, the negative end of the output capacitor Co, and the load RL. The anode of the first rectifying element 110 is connected between the third coil W3 and the fourth coil W4 and the cathode of the second rectifying element 112. The end of the auxiliary inductor La not connected to the third capacitor C3 and the cathode of the first rectifying element 110 is connected to the positive terminal of the output capacitor Co and the load RL, wherein the output capacitor Co is connected in parallel with the load RL.
Referring to fig. 2, a schematic diagram of a current path of a boost zero-ripple dc converter in a first operating mode according to a first embodiment of the invention is shown. When the boost zero-ripple dc converter 10 operates in the first operating mode, the power switch Q is turned on, the first rectifying element 110 is turned off, and the second rectifying element 112 is turned on. At this time, the power generated by the power Vin forms three current paths in the input stage, wherein one current path is formed among the power Vin, the ripple cancellation inductor 100 and the power switch Q, another current path is formed among the first capacitor C1, the first coil W1 and the power switch Q, and the last current path is formed among the second coil W2, the power switch Q and the second capacitor C2. Thereby, the power provided by the power source Vin may be transferred to the first and second coils W1 and W2, and coupled to the third and fourth coils W3 and W4.
The power coupled to the output stage forms two current paths among the third coil W3, the fourth coil W4, the auxiliary inductor La, and the output capacitor Co, one of which is formed among the third coil W3, the third capacitor C3, the auxiliary inductor La, the output capacitor Co, and the second rectifying element 112, and the other of which is formed among the fourth coil W4, the fourth capacitor C4, the second rectifying element 112; the output capacitor Co also supplies power to the load RL. Thus, the ripple elimination inductor 100 and the auxiliary inductor La cooperate to distribute the power provided by the power Vin, so as to achieve the effect of reducing the ripple.
Referring to fig. 3, a schematic diagram of a current path of the boost zero-ripple dc converter in the second operating mode according to the first embodiment of the invention is shown. When the boost zero-ripple dc converter 10 operates in the second operating mode, the power switch Q is turned off, the first rectifying element 110 is turned on, and the second rectifying element 112 is turned off. At this time, the power generated by the power Vin forms two current paths in the input stage, wherein one current path is formed among the power Vin, the ripple elimination inductor 100, the second coil W2 and the second capacitor C2, and the other current path is formed among the first capacitor C1, the ripple elimination inductor 100 and the first coil W1. Thereby, the power provided by the power source Vin may be transferred to the first and second coils W1 and W2, and coupled to the third and fourth coils W3 and W4.
The power coupled to the output stage also forms two current paths, one of which is formed between the third coil W3, the first rectifying element 110 and the third capacitor C3, and the other of which is formed between the fourth coil W4, the first rectifying element 110, the auxiliary inductor La, the output capacitor Co and the fourth capacitor C4; the output capacitor Co also supplies power to the load RL. Thus, the ripple elimination inductor 100 and the auxiliary inductor La cooperate to distribute the power provided by the power Vin, so as to achieve the effect of reducing the ripple.
Referring to fig. 4, a circuit diagram of a boost zero-ripple dc converter according to a second embodiment of the invention is shown. The step-up zero-ripple dc converter 10 shown in fig. 4 is connected between the power source Vin and the load RL, and includes an energy isolation and conversion unit (not numbered), a ripple cancellation inductor 100, a power switch Q, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first rectifying element 110, a second rectifying element 112, an auxiliary inductor La, and an output capacitor Co.
In fig. 4, the power isolation and conversion unit includes first to fourth coils W1-W4, a first coil W1 and a second coil W2 connected in series and located at a side (hereinafter referred to as an input stage) of the boost zero-ripple dc converter 10 connected to the power source Vin; the third winding W3 and the fourth winding W4 are connected in series and located on the side of the boost zero-ripple dc converter connected to the load RL (hereinafter referred to as the output stage). The first coil W1 and the third coil W3 are coupled to each other to form a first transformer TR1, and the second coil W2 and the fourth coil W4 are coupled to each other to form a second transformer TR 2.
The first capacitor C1, the second capacitor C2, the power switch Q, and the ripple cancellation inductor 100 are located at the input stage. One end of the first capacitor C1 is connected to the low level terminal of the power Vin, and the other end is connected to the end of the first coil W1 not connected to the second coil W2.
As shown in fig. 4, the power switch Q is an nmos fet, the drain thereof is connected to the high-level end of the power Vin and the end of the second capacitor C2 not connected to the second coil W2, and the source thereof is connected to the end of the ripple cancellation inductor 100 and the end of the first coil W1 connected to the second coil W2. The drain-source of the power switch Q may be further connected in parallel with a Diode D, which may be, for example, a Body Diode (Body Diode) of the power switch Q.
The other end of the ripple cancellation inductor 100 is connected to the low level end of the power Vin and the end of the first capacitor C1 not connected to the first coil W1; one end of the second capacitor C2 is connected to the high-level terminal of the power Vin, and the other end is connected to the end of the second coil W2 not connected to the first coil W1.
The first rectifying element 110, the second rectifying element 112, the third capacitor C3, the fourth capacitor C4, the auxiliary inductor La, and the output capacitor Co are located at the output stage. In fig. 4, one end of the third capacitor C3 is connected to the end of the third coil W3 that is not connected to the fourth coil W4, and the other end is connected to the cathode of the first rectifying element 110 and one end of the auxiliary inductor La. One end of the fourth capacitor C4 is connected to the end of the fourth coil W4 that is not connected to the third coil W3, and the other end is connected to the anode of the second rectifier device 112 and one end (positive end) of the output capacitor Co. The first rectifying element 110 has an anode electrically connected between the third coil W3 and the fourth coil W4, and a cathode connected to the third capacitor C3 and the auxiliary inductor La; the anode of the second rectifying element 112 is connected to the end of the fourth capacitor C4 not connected to the fourth coil W4, and the cathode is connected to the end of the third coil W3 connected to the fourth coil W4. The end of the auxiliary inductor La not connected to the third capacitor C3 and the first rectifying element 110 is connected to the negative terminal of the output capacitor Co and the load RL, wherein the output capacitor Co is connected in parallel with the load RL. The operation mode of the step-up zero-ripple dc converter of this embodiment is the same as the operation mode of the step-up zero-ripple dc converter of the first embodiment, and is not described herein again; in addition, the boost zero-ripple dc converter of the present embodiment can also achieve the effect of reducing the output ripple voltage.
Referring to fig. 5, a circuit diagram of a boost zero-ripple dc converter according to a third embodiment of the invention is shown. The step-up zero-ripple dc converter 10 shown in fig. 5 is connected between the power source Vin and the load RL, and includes an energy isolation and conversion unit (not numbered), a ripple cancellation inductor 100, a power switch Q, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first rectifying element 110, a second rectifying element 112, an auxiliary inductor La, and an output capacitor Co.
In fig. 5, the power isolation and conversion unit includes first to fourth coils W1-W4, the first coil W1 and the second coil W2 are located at a side of the step-up zero-ripple dc converter 10 connected to the power source Vin (hereinafter referred to as an input stage), and the third coil W3 and the fourth coil W4 are located at a side of the step-up zero-ripple dc converter connected to the load RL (hereinafter referred to as an output stage). The first coil W1 and the third coil W3 are coupled to each other to form a first transformer TR1, and the second coil W2 and the fourth coil W4 are coupled to each other to form a second transformer TR 2.
The first capacitor C1, the power switch Q, the ripple cancellation inductor 100 and the second capacitor C2 are located at the input stage. One end of the first coil W1 and one end of the second coil W2 are electrically connected to the high level end of the power source Vin through the second capacitor C2, the other end of the second coil W2 is electrically connected to the low level end of the power source Vin through the ripple elimination inductor 100, and the other end of the first coil W1 is electrically connected to the low level end of the power source Vin through the first capacitor C1.
As shown in fig. 5, the power switch Q is an nmos transistor, the drain thereof is connected to the high level terminal of the power Vin, and the source thereof is electrically connected to the low level terminal of the power Vin through the ripple cancellation inductor 100. The drain-source of the power switch Q may be further connected in parallel with a Diode D, which may be, for example, a Body Diode (Body Diode) of the power switch Q.
The first rectifying element 110, the second rectifying element 112, the third capacitor C3, the fourth capacitor C4, the auxiliary inductor La, and the output capacitor Co are located at the output stage. One end of the third coil W3 and one end of the fourth coil W4 are electrically connected to one end (positive end) of the output capacitor Co through the fourth capacitor C4; wherein the output capacitor Co is connected in parallel with the load RL. The other end of the third coil W3 is electrically connected to the other end (negative end) of the output capacitor Co through the third capacitor C3 and the auxiliary inductor La, and the other end of the fourth coil W4 is connected between the first rectifying element 110 and the second rectifying element 112; the first rectifying element 110 and the second rectifying element 112 are connected in series. In fig. 5, the cathode of the second rectifying element 112 is connected to the anode of the first rectifying element 110, the anode of the second rectifying element 112 is connected between the fourth capacitor C4 and the positive terminal of the output capacitor Co, and the cathode of the first rectifying element 110 is connected between the third capacitor C3 and the auxiliary inductor La. The operation mode of the step-up zero-ripple dc converter of this embodiment is the same as the operation mode of the step-up zero-ripple dc converter of the first embodiment, and is not described herein again; in addition, the boost zero-ripple dc converter of the present embodiment can also achieve the effect of reducing the output ripple voltage.
Referring to fig. 6, a circuit diagram of a boost zero-ripple dc converter according to a fourth embodiment of the invention is shown. The step-up zero-ripple dc converter 10 shown in fig. 6 is connected between the power source Vin and the load RL, and includes an energy isolation and conversion unit (not numbered), a ripple cancellation inductor 100, a power switch Q, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first rectifying element 110, a second rectifying element 112, an auxiliary inductor La, and an output capacitor Co.
In fig. 6, the power isolation and conversion unit includes first to fourth coils W1-W4, the first coil W1 and the second coil W2 are located at a side of the step-up zero-ripple dc converter 10 connected to the power source Vin (hereinafter referred to as an input stage), and the third coil W3 and the fourth coil W4 are located at a side of the step-up zero-ripple dc converter connected to the load RL (hereinafter referred to as an output stage). The first coil W1 and the third coil W3 are coupled to each other to form a first transformer TR1, and the second coil W2 and the fourth coil W4 are coupled to each other to form a second transformer TR 2.
The first capacitor C1, the power switch Q, the ripple cancellation inductor 100 and the second capacitor C2 are located at the input stage. One end of the first coil W1 is connected to the low level terminal of the power Vin, and the other end is electrically connected to the high level terminal of the power Vin through the first capacitor C1. One end of the second coil W2 is electrically connected to the high level end of the power source Vin through the ripple elimination inductor 100, and the other end is electrically connected to the low level end of the power source Vin through the second capacitor C2.
As shown in fig. 6, the power switch Q is an nmos transistor, the drain thereof is electrically connected to the high level terminal of the power source Vin through the ripple cancellation inductor 100, and the source thereof is electrically connected to the low level terminal of the power source Vin. The drain-source of the power switch Q may be further connected in parallel with a Diode D, which may be, for example, a Body Diode (Body Diode) of the power switch Q.
The first rectifying element 110, the second rectifying element 112, the third capacitor C3, the fourth capacitor C4, the auxiliary inductor La, and the output capacitor Co are located at the output stage. One end of the third coil W3 is electrically connected to one end (positive end) of the output capacitor Co through the third capacitor C3 and the auxiliary inductor La, and the other end of the third coil W3 is connected to the other end (negative end) of the output capacitor Co; wherein the output capacitor Co is connected in parallel with the load RL.
As shown in fig. 6, the cathode of the first rectifying element 110 is connected to the anode of the second rectifying element 112, the anode of the first rectifying element 110 is connected to one end of the third coil W3 connected to the output capacitor Co, and the cathode of the second rectifying element 112 is connected between the third capacitor C3 and the auxiliary inductor La.
One end of the fourth coil W4 is connected to the cathode of the first rectifying element 110 (i.e., the anode of the second rectifying element 112), and the other end is connected to the end of the third coil W3 connected to the negative terminal of the output capacitor Co via a fourth capacitor C4. The operation mode of the step-up zero-ripple dc converter of this embodiment is the same as the operation mode of the step-up zero-ripple dc converter of the first embodiment, and is not described herein again; in addition, the boost zero-ripple dc converter of the present embodiment can also achieve the effect of reducing the output ripple voltage.
Referring to fig. 7, a circuit diagram of a boost zero-ripple dc converter according to a fifth embodiment of the invention is shown. In fig. 7, the boost-type zero-ripple dc converter 10 is connected between a power source Vin and a load RL, and includes an electric energy isolation and conversion unit (not numbered), a ripple cancellation inductor 100, a power switch Q, an input stage first rectifying element 120, an input stage second rectifying element 122, a first rectifying element 110, an excitation inductor Lm, and an output capacitor Co.
The power isolation and conversion unit includes first to third coils W1-W3, the first coil W1 and the second coil W2 are located at a side of the boost-type zero-ripple dc converter 10 connected to the power source Vin (hereinafter referred to as an input stage), and the third coil W3 is located at a side of the boost-type zero-ripple dc converter connected to the load RL (hereinafter referred to as an output stage). The first coil W1, the second coil W2 and the third coil W3 cooperate to form a transformer TR.
The ripple elimination inductor 100, the power switch Q, the input stage first rectifying element 120, the input stage second rectifying element 122, and the magnetizing inductor Lm are located in the input stage. In fig. 7, the power switch Q is an nmos transistor, and the drain and the source of the nmos transistor can be further connected in parallel with a Diode D, such as a Body Diode (Body Diode) of the power switch Q.
One end of the first winding W1 is connected to the cathode of the input stage first rectifying element 120 and the cathode of the input stage second rectifying element 122, and the other end is connected to the low-level end of the power Vin. The anode of the input stage first rectifying element 120 is connected to the high-level end of the power Vin through the ripple cancellation filter 100. One end of the second coil W2 is connected to the low-level end of the power Vin, and the other end is connected to the anode of the input-stage second rectifying element 122. The drain of the power switch Q is connected to the anode of the input stage first rectifying element 120, and the source is connected to the low-level end of the power Vin. The magnetizing inductor Lm is connected in parallel with the first coil W1.
The first rectifying element 110 and the output capacitor Co are located at the output stage; one end of the third coil W3 is connected to the anode of the first rectifying element 110, and the cathode of the first rectifying element 110 is connected to one end (positive end) of the output capacitor Co; the other end of the third coil W3 is connected to the other end (negative end) of the output capacitor Co. The output capacitor Co is connected in parallel with the load RL.
Referring to fig. 8, a schematic diagram of a current path of a boost zero-ripple dc converter in a first operating mode according to a fifth embodiment of the invention is shown. When the boost zero-ripple dc converter 10 operates in the first operating mode, the power switch Q is turned off, and the first rectifying element 110 is turned on. At this time, the power generated by the power Vin forms two current paths in the input stage, one of the current paths is formed between the power Vin, the ripple cancellation inductor 100, the input stage first rectifying element 120, the magnetizing inductor Lm and the first coil W1, and the other current path is formed between the second coil W2 and the low-level end of the power Vin.
The power coupled to the output stage is transmitted to the output capacitor Co and the load RL through the third coil W3 and the first rectifying element 110, respectively. Thus, the ripple elimination inductor 100 and the exciting inductor Lm cooperate to distribute the power provided by the power Vin, so as to achieve the effect of reducing the ripple.
Referring to fig. 9, a schematic diagram of a current path of a boost zero-ripple dc converter in a second operating mode according to a fifth embodiment of the invention is shown. When the boost zero-ripple dc converter 10 operates in the second operating mode, the power switch Q is turned on, and the first rectifying element 110 is turned off, so that no current is conducted to the load. At this time, the power generated by the power Vin forms three current paths in the input stage, wherein one current path is formed between the power Vin, the ripple cancellation inductor 100 and the power switch Q, the other current path is formed between the second winding W2 and the second rectifying element 122 of the input stage, and the third current path is formed between the first winding W1 and the magnetizing inductor Lm. Thus, the ripple elimination inductor 100 and the exciting inductor Lm cooperate to distribute the power provided by the power Vin, so as to achieve the effect of reducing the ripple.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (5)
1. A step-up zero-ripple DC converter connected between a power source and a load, the step-up zero-ripple DC converter comprising:
an electric energy isolation and conversion unit, comprising a plurality of coils, wherein the plurality of coils divide the boost type zero-ripple direct current converter into an input stage and an output stage, wherein the input stage is connected with the power supply, and the output stage is connected with the load;
a ripple cancellation inductor in the input stage;
a power switch located at the input stage and electrically connected to the ripple elimination inductor and the electric energy isolation and conversion unit;
a first capacitor, located at the input stage and electrically connected to the power isolation and conversion unit;
a second capacitor, located at the input stage and electrically connected to the power isolation and conversion unit;
a third capacitor, located at the output stage and electrically connected to the power isolation and conversion unit;
a fourth capacitor, located at the output stage and electrically connected to the power isolation and conversion unit;
a first rectifying element located at the output stage and electrically connected to the electric energy isolating and converting unit and the third capacitor;
the second rectifying element is positioned at the output stage and is electrically connected with the electric energy isolating and converting unit and the fourth capacitor; and
an auxiliary inductor electrically connected to the power isolation and conversion unit,
when the power switch is turned on, the ripple elimination inductor and the auxiliary inductor cooperate to distribute the power provided by the power supply, so as to reduce the ripple value of the power transmitted to the load; when the power switch is turned off, the ripple elimination inductor and the auxiliary inductor also cooperate to distribute the power provided by the power source to reduce the ripple value of the power delivered to the load.
2. The step-up zero-ripple DC converter according to claim 1, wherein the plurality of coils cooperate to form two transformers.
3. The step-up zero-ripple dc converter according to claim 2, wherein one end of one of the coils of the input stage is connected to the first capacitor, the other end of the one of the coils of the input stage is connected to one end of the other coil of the input stage, the power switch and the ripple elimination inductor, and the other end of the other coil of the input stage is connected to the second capacitor; one end of one coil of the output stage is connected to the auxiliary inductor through a third capacitor, the other end of the other coil of the output stage is connected to one end of the other coil of the output stage, the first rectifying element and the second rectifying element, the other end of the other coil of the output stage is connected to the fourth capacitor, and the first rectifying element and the second rectifying element are connected in series.
4. The step-up zero-ripple DC converter according to claim 2, wherein the plurality of coils at the input stage are connected in series and the plurality of coils at the output stage are connected in series.
5. The step-up zero-ripple DC converter according to claim 4, wherein one end of the input stage where the plurality of coils are connected is connected to the ripple elimination inductor and the power switch, the other end of one of the coils of the input stage is connected to the first capacitor, and the other end of the other coil of the input stage is connected to the second capacitor; one end of the output stage, which is connected with the plurality of coils, is connected with the first rectifying element and the second rectifying element, the other end of one coil of the output stage is electrically connected with the auxiliary inductor through the third capacitor, and the other end of the other coil of the output stage is connected with the second rectifying element through the fourth capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610876481.1A CN107919800B (en) | 2016-10-08 | 2016-10-08 | Boost type zero ripple DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610876481.1A CN107919800B (en) | 2016-10-08 | 2016-10-08 | Boost type zero ripple DC converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107919800A CN107919800A (en) | 2018-04-17 |
| CN107919800B true CN107919800B (en) | 2020-05-26 |
Family
ID=61891568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610876481.1A Active CN107919800B (en) | 2016-10-08 | 2016-10-08 | Boost type zero ripple DC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107919800B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1365180A (en) * | 2000-08-31 | 2002-08-21 | 台达电子工业股份有限公司 | Soft switching whole bridge connection circuit converter |
| CN201717795U (en) * | 2010-06-22 | 2011-01-19 | 骆介龙 | High-frequency natural zero-potential soft switching transformer |
| CN103208939A (en) * | 2013-04-19 | 2013-07-17 | 江西中能电气科技有限公司 | Photovoltaic micro-inverter based on secondary-side reference current reconstruction, control system and control method |
| TW201519567A (en) * | 2013-11-01 | 2015-05-16 | Hep Tech Co Ltd | Isolated AC-DC conversion device and conversion method thereof |
| CN204967645U (en) * | 2014-08-07 | 2016-01-13 | 雅达电子国际有限公司 | High voltage power supply converter |
| CN105391287A (en) * | 2015-11-23 | 2016-03-09 | 中国矿业大学 | Zero-input current ripple high-gain converter based on double coupling inductors and single switch |
| TW201611493A (en) * | 2014-09-03 | 2016-03-16 | 映興電子股份有限公司 | Step up DC converter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4285133B2 (en) * | 2003-01-23 | 2009-06-24 | 横河電機株式会社 | Switching power supply |
-
2016
- 2016-10-08 CN CN201610876481.1A patent/CN107919800B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1365180A (en) * | 2000-08-31 | 2002-08-21 | 台达电子工业股份有限公司 | Soft switching whole bridge connection circuit converter |
| CN201717795U (en) * | 2010-06-22 | 2011-01-19 | 骆介龙 | High-frequency natural zero-potential soft switching transformer |
| CN103208939A (en) * | 2013-04-19 | 2013-07-17 | 江西中能电气科技有限公司 | Photovoltaic micro-inverter based on secondary-side reference current reconstruction, control system and control method |
| TW201519567A (en) * | 2013-11-01 | 2015-05-16 | Hep Tech Co Ltd | Isolated AC-DC conversion device and conversion method thereof |
| CN204967645U (en) * | 2014-08-07 | 2016-01-13 | 雅达电子国际有限公司 | High voltage power supply converter |
| TW201611493A (en) * | 2014-09-03 | 2016-03-16 | 映興電子股份有限公司 | Step up DC converter |
| CN105391287A (en) * | 2015-11-23 | 2016-03-09 | 中国矿业大学 | Zero-input current ripple high-gain converter based on double coupling inductors and single switch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107919800A (en) | 2018-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10644503B2 (en) | Coupled split path power conversion architecture | |
| US8710905B2 (en) | Bias voltage generating circuit and switching power supply thereof | |
| US9112423B2 (en) | Bidirectional DC-DC converter and power supply system | |
| US7633266B2 (en) | Charger circuit and transformer used therein | |
| US9413227B2 (en) | Converter circuit with power factor correction for converting AC input voltage into DC output voltage | |
| KR20150082315A (en) | Flyback converter circuit | |
| US20200212801A1 (en) | Single Inductor Multiple Output Regulator with Hybrid Negative and Positive Rail Generation | |
| US6567284B2 (en) | DC to DC converting incorporating ZVS circuit and synchronized isolation circuit | |
| CN102315759B (en) | There is raster data model controller circuitry and the power-up circuit thereof of anti saturation circuit | |
| Hoch et al. | Voltage multiplier applied to boost DC–DC converter: analysis, design, and performance evaluations | |
| US9887632B1 (en) | Step-up KP ripple free converter | |
| JP5152510B2 (en) | Voltage conversion circuit | |
| CN107919800B (en) | Boost type zero ripple DC converter | |
| US10014765B2 (en) | Single stage power factor correction converter | |
| US7816895B2 (en) | Power supplying device | |
| US10230300B2 (en) | Power converter predriver system with multiple power modes | |
| TWI607622B (en) | Step-up direct current converter | |
| TWI597928B (en) | Step-down kp direct current converter | |
| CN107370380B (en) | Boost-buck type direct current converter | |
| CN219107305U (en) | Switch power supply | |
| US9831785B1 (en) | Step-up/down direct current converter | |
| KR102537358B1 (en) | Insulated switching power supply | |
| JP6945429B2 (en) | Insulated switching power supply | |
| US9667160B1 (en) | Step-down direct current converter | |
| JP2008245388A (en) | Switching power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |