CN102843039A - Control circuit and constant current source circuit with same - Google Patents
Control circuit and constant current source circuit with same Download PDFInfo
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- CN102843039A CN102843039A CN2012103465196A CN201210346519A CN102843039A CN 102843039 A CN102843039 A CN 102843039A CN 2012103465196 A CN2012103465196 A CN 2012103465196A CN 201210346519 A CN201210346519 A CN 201210346519A CN 102843039 A CN102843039 A CN 102843039A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The invention discloses a control circuit used to control a main circuit in a constant current source circuit. The control circuit comprises a controller, a ripple generation circuit and a compensation circuit; the ripple generation circuit is used to obtain a voltage signal which is in a first proportion to the output voltage of a transformer in the main circuit, and separate out a ripple signal in the voltage signal; the compensation circuit is used to acquire the current sample signal of a switch tube in the main circuit, superpose and transmit the ripple signal and the current sample signal to the current sample input terminal of the controller as the current sample input signal of the controller; the controller receives the current sample input signal outputted by the compensation circuit, switches off the switch tube when the current sample input signal reaches a current threshold, and switches on the switch tube when the on-off cycle of the switch tube is in a second proportion to the duration of the current. The control circuit disclosed by the invention can reduce the total harmonic distortion of the constant current source circuit and improve the power factor of the circuit. The invention also discloses a constant current source circuit.
Description
Technical field
The present invention relates to constant current power supply technique field, the constant-current source circuit that relates in particular to a kind of control circuit and have this control circuit.
Background technology
At electric and electronic technical field, constant-current source circuit can provide stable electric current for electric equipment, to drive electric equipment stable operation.Because electric equipment requires increasingly highly to the power factor harmonic, in order to obtain High Power Factor and to reduce input current harmonics distortion, in constant-current source circuit, has introduced power factor correction (PFC) technology.Fig. 1 and Fig. 2 are existing two kinds of constant-current source circuits, comprise main circuit and controller, and wherein main circuit comprises input branch road and converter.
In constant-current source circuit shown in Figure 1; The input branch road comprises the rectification circuit and first capacitor C 11, and converter comprises inductance L 11, the first diode D11, second capacitor C 12, the second diode D12, switching tube Q11, first resistance R 11, transformer T11, the 3rd diode D13 and the 3rd capacitor C 13.Wherein: the positive output end of rectification circuit passes through first capacitor C, 11 ground connection, simultaneously the negative output terminal ground connection of rectification circuit; One end of inductance L 11 is connected to the anode of the second diode D12 as input, the other end of constant-current source circuit; Negative electrode, second end that first end of switching tube Q11 is connected to the second diode D12 pass through first resistance R, 11 ground connection; An end, negative electrode that the anode of the first diode D11 is connected to said inductance L 11 pass through second capacitor C, 12 ground connection; The end of the same name of the former limit of transformer T11 winding is connected to the common port of the first diode D11 and second capacitor C 12, first end that the different name end is connected to switching tube Q11; The different name end of transformer T11 secondary winding is connected to the end that the anode of the 3rd diode D13, end of the same name are connected to the 3rd capacitor C 13; The negative electrode of the 3rd diode D13 is connected with the other end of the 3rd capacitor C 13, and the two ends of the 3rd capacitor C 13 are as the output of constant-current source circuit.
In constant-current source circuit shown in Figure 2; The input branch road comprises the rectification circuit and first capacitor C 21; Converter comprises inductance L 21, the first diode D21, second capacitor C 22, the second diode D22, switching tube Q21, first resistance R 21, transformer T21, the 3rd diode D23 and the 3rd capacitor C 23, and winding is provided with tap on the former limit of transformer T21.Wherein: the positive output end of rectification circuit passes through first capacitor C, 21 ground connection, simultaneously the negative output terminal ground connection of rectification circuit; One end of inductance L 21 is connected to the anode of the second diode D22 as input, the other end of constant-current source circuit; The negative electrode of the second diode D22 is connected to the tap terminals of transformer T21; Different name end, second end that first end of switching tube Q21 is connected to transformer T21 pass through first resistance R, 21 ground connection; An end, negative electrode that the anode of the first diode D21 is connected to said inductance L 11 pass through second capacitor C, 22 ground connection; The end of the same name of the former limit of transformer T21 winding is connected to the common port of the first diode D21 and second capacitor C 22; The different name end of transformer T21 secondary winding is connected to the end that the anode of the 3rd diode D23, end of the same name are connected to the 3rd capacitor C 23, and the negative electrode of the 3rd diode D23 is connected with the other end of the 3rd capacitor C 23, and the two ends of the 3rd capacitor C 23 are as the output of constant-current source circuit.
Main circuit in the constant-current source circuit illustrated in figures 1 and 2 is controlled by controller, and this controller detects the current signal of the switching tube of flowing through, and when the electric current of the switching tube of flowing through reached a threshold value, the control switch pipe turn-offed; Simultaneously, controller detects the current duration of transformer secondary winding, when the ratio of the switch periods of switching tube and this current duration reaches a threshold value, and the conducting of control switch pipe.
But the applicant finds: (THD) is bigger for the total harmonic distortion of constant-current source circuit illustrated in figures 1 and 2, and power factor (PF) is less.
Summary of the invention
In view of this; The object of the present invention is to provide a kind of control circuit; This control circuit is applied to can reduce the distortion of circuit input current in the existing constant-current source circuit, makes the input current of circuit better follow the variation of input voltage; Thereby reduce the total harmonic distortion of circuit, improve the power factor of circuit.
For realizing above-mentioned purpose, the present invention provides following technical scheme:
A kind of control circuit is used for the main circuit of constant-current source circuit is controlled, and said control circuit comprises controller, ripple generative circuit and compensating circuit;
Said ripple generative circuit is used for obtaining with the output voltage of the converter of said main circuit and becomes the voltage signal of first ratio, and isolates the ripple signal in the said voltage signal;
Said compensating circuit is used for gathering the current sampling signal of the switching tube of said main circuit; And with the current sample input of sending into said controller after said ripple signal and the stack of said current sampling signal, as the current sample input signal of said controller;
Said controller receives the current sample input signal of said compensating circuit output; When said current sample input signal reaches current threshold; Controlling said switching tube turn-offs; Said controller detects the current duration of the transformer secondary winding in the said main circuit, when the switch periods of said switching tube becomes second ratio with said current duration, controls said switching tube conducting.
Preferably, in above-mentioned control circuit, said ripple generative circuit comprises auxiliary winding, the 4th diode, the 4th electric capacity and the 5th electric capacity;
Said auxiliary winding is positioned at the former limit winding side of said transformer, the end ground connection of the same name of said auxiliary winding;
Different name end, the negative electrode that the anode of said the 4th diode is connected to said auxiliary winding is connected to an end of said the 4th electric capacity, and the other end of said the 4th electric capacity is connected to the end of the same name of said auxiliary winding;
One end of said the 5th electric capacity is connected to the common port of said the 4th diode and the 4th electric capacity, and the other end of said the 5th electric capacity is exported said ripple signal.
Preferably, in above-mentioned control circuit, said ripple generative circuit comprises auxiliary winding, the 4th diode, the 4th electric capacity, second resistance, the 3rd resistance and the 5th electric capacity;
Said auxiliary winding is positioned at the former limit winding side of said transformer, the end ground connection of the same name of said auxiliary winding;
Different name end, the negative electrode that the anode of said the 4th diode is connected to said auxiliary winding is connected to an end of said the 4th electric capacity, and the other end of said the 4th electric capacity is connected to the end of the same name of said auxiliary winding;
Be parallel to the two ends of said the 4th electric capacity after said second resistance and the series connection of the 3rd resistance;
One end of said the 5th electric capacity is connected to the common port of said second resistance and the 3rd resistance, and the other end of said the 5th electric capacity is exported said ripple signal.
Preferably, in above-mentioned control circuit, said compensating circuit comprises the 4th resistance and the 5th resistance;
One end of said the 4th resistance is connected to second end of said switching tube, the current sample input that the other end is connected to said controller;
One end of said the 5th resistance is connected to the other end of said the 5th electric capacity, the current sample input that the other end is connected to said controller.
A kind of constant-current source circuit comprises main circuit and above-mentioned any control circuit.
This shows; Beneficial effect of the present invention is: in the control circuit disclosed by the invention, at ripple signal of current sample input compensation of controller, thereby be the ripple of a low frequency of peak current compensation of switching tube; This low-frequency ripple makes former input current near peak value, reduce, raise at zero cross near; The input current that promptly obtains after the compensation more near sinusoidal wave, has reduced the distortion degree, thereby reaches the purpose that reduces the constant-current source circuit total harmonic distortion, improves the power factor of circuit.The present invention discloses a kind of constant-current source circuit,, can reach the purpose that reduces total harmonic distortion, improves the power factor of circuit through its control circuit is improved.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention; To do simple introduction to the accompanying drawing of required use among the embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the circuit diagram of existing a kind of constant-current source circuit;
Fig. 2 is the circuit diagram of existing another kind of constant-current source circuit;
Fig. 3 is the oscillogram of input current and input voltage in the constant-current source circuit illustrated in figures 1 and 2;
Fig. 4 is the structural representation of a kind of control circuit disclosed by the invention;
Fig. 5 is the circuit diagram of a kind of constant-current source circuit disclosed by the invention;
Fig. 6 is the circuit diagram of another kind of constant-current source circuit disclosed by the invention;
Fig. 7 is the oscillogram of the current sampling signal of the switching tube after overcompensation;
Fig. 8 is the oscillogram of the input current of the constant-current source circuit after overcompensation;
Fig. 9 is the circuit diagram of another kind of constant-current source circuit disclosed by the invention.
Embodiment
In constant-current source circuit shown in Figure 1; When switching tube Q11 conducting; Input current Iin flow through successively inductance L 11, the second diode D12 and switching tube Q11; The former limit winding of transformer T11 is by the power supply of second capacitor C 12, the electric current I t that flows through the former limit of the transformer T11 winding switching tube Q11 that also flows through, and the electric current I s of the switching tube Q11 that flows through this moment has comprised the primary current It of input current Iin and transformer T11; When switching tube Q11 turn-offed, inductance L 11 gave second capacitor C 12 chargings through the second diode D12, and transformer T11 discharges through the secondary winding, is electric.
In constant-current source circuit shown in Figure 2; When switching tube Q21 conducting; Input current Iin flow through successively second winding and the switching tube Q21 of inductance L 21, the second diode D22 and the former limit of transformer T21 winding; The former limit winding of transformer T21 is by the power supply of second capacitor C 22, the electric current I t that flows through the former limit of the transformer T21 winding switching tube Q21 that also flows through, and the electric current I s of the switching tube Q21 that flows through this moment has comprised the primary current It of input current Iin and transformer T21; When switching tube Q21 turn-offed, inductance L 21 gave second capacitor C 22 chargings through the second diode D22, and transformer T21 discharges through the secondary winding, is electric.
The applicant finds: in constant-current source circuit illustrated in figures 1 and 2; Utilize in the process that controller controls main circuit, the input current Iin and the waveform relationship between the input voltage vin of circuit are as shown in Figure 3, can be seen by Fig. 3; Input current Iin distorts; Can not well follow the variation of input voltage vin, therefore cause the total harmonic distortion (THD) of circuit bigger, and power factor (PF) be less.
The invention discloses a kind of control circuit, this control circuit is applied to can reduce the total harmonic distortion of circuit in the existing constant-current source circuit, improves the power factor of circuit.
Technological thought is: reduce the distortion of input current in the constant-current source circuit, make the input current of circuit better follow the variation of input voltage, thereby reduce the total harmonic distortion of circuit, improve the power factor of circuit.
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making under the creative work prerequisite, and the every other embodiment that is obtained belongs to protection range of the present invention.
Referring to Fig. 4, Fig. 4 is the structural representation of a kind of control circuit disclosed by the invention.This control circuit is used for the main circuit of constant-current source circuit illustrated in figures 1 and 2 is controlled, and this control circuit comprises controller 41, ripple generative circuit 42 and compensating circuit 43.Wherein:
Ripple generative circuit 42 is used for obtaining the voltage signal that becomes first ratio with the output voltage of constant-current source circuit converter, and isolates the ripple signal in this voltage signal.The output voltage of converter is the output voltage of transformer secondary winding in the constant-current source circuit, in the direct voltage of transformer secondary winding output, has comprised an alternating component, and this alternating component is the ripple signal.
Compensating circuit 43 is used for the current sampling signal of acquisition stream through switching tube; And send into the current sample input of controller 41 after the ripple signal that ripple generative circuit 42 is generated and this current sampling signal stack, the signal after this stack is as the current sample input signal of controller 41.
Be elaborated below in conjunction with the structure and the control procedure of specific embodiment to control circuit.
Referring to Fig. 5; Control circuit comprises controller, ripple generative circuit and compensating circuit; Wherein, the ripple generative circuit comprises auxiliary winding, the 4th diode D54, the 4th capacitor C 54 and the 5th capacitor C 55, and compensating circuit comprises the 4th resistance R 54 and the 5th resistance R 55.
The main circuit of constant-current source circuit comprises input branch road and converter.The input branch road comprises the rectification circuit and first capacitor C 51.Converter comprises inductance L 51, the first diode D51, second capacitor C 52, the second diode D52, switching tube Q51, first resistance R 51, transformer T51, the 3rd diode D53 and the 3rd capacitor C 53.Wherein, the positive output end of rectification circuit passes through first capacitor C, 51 ground connection, simultaneously the negative output terminal ground connection of rectification circuit; One end of inductance L 51 is connected to the anode of the second diode D52 as input, the other end of constant-current source circuit; Negative electrode, second end that first end of switching tube Q51 is connected to the second diode D52 pass through first resistance R, 51 ground connection; An end, negative electrode that the anode of the first diode D51 is connected to inductance L 51 pass through second capacitor C, 52 ground connection; The end of the same name of the former limit of transformer T51 winding is connected to the common port of the first diode D51 and second capacitor C 52, first end that the different name end is connected to switching tube Q51; The different name end of transformer T51 secondary winding is connected to the end that the anode of the 3rd diode D53, end of the same name are connected to the 3rd capacitor C 53; The negative electrode of the 3rd diode D53 is connected with the other end of the 3rd capacitor C 53, and the two ends of the 3rd capacitor C 53 are as the output of constant-current source circuit.
The annexation of control circuit and main circuit is: auxiliary winding is positioned at the former limit winding side of transformer T51; The end ground connection of the same name of auxiliary winding; The output voltage of auxiliary winding becomes preset ratio with the output voltage of secondary winding, can adjust this preset ratio through the coil turn of adjusting auxiliary winding; The anode of the 4th diode D54 is connected to the end that different name end, the negative electrode of assisting winding are connected to the 4th capacitor C 54, and the other end of the 4th capacitor C 54 is connected to the end of the same name of auxiliary winding; Common port, the other end that one end of the 5th capacitor C 55 is connected to the 4th diode D54 and the 4th capacitor C 54 is connected to an end of the 5th resistance R 55, and the other end of the 5th resistance R 55 is connected to the current sample input of controller; One end of the 4th resistance R 54 is connected to second end of switching tube Q51, the current sample input that the other end is connected to controller; The output of controller is connected to the control end of switching tube Q51, and the voltage sample input of controller is connected to the secondary winding of transformer T51.
In the d. c. voltage signal that the secondary winding of transformer T51 is exported, comprised alternating component; Auxiliary winding is arranged on the former limit of transformer T51 winding side; Rectifying and wave-filtering through the 4th diode D54 and the 4th capacitor C 54; Produce and the proportional voltage signal of secondary winding output voltage amplitude, this voltage signal is as the input signal Vf of ripple generative circuit.Afterwards; The 5th capacitor C 55 is removed the DC component among the input signal Vf; The output AC component; This alternating current component is exactly the ripple signal Ic of input signal Vf, and the ripple signal Ic of output is through the current sampling signal Is stack of the 5th resistance R 55 and the switching tube Q51 that flows through, as the current sample input signal of controller.
When current sample input signal (being the stack of ripple signal Ic and current sampling signal Is) when reaching current threshold Ipk; Controller sends the drive signal of its shutoff of control to switching tube through its output; This moment, inductance L 51 gave second capacitor C 52 chargings through the former limit winding of the second diode D52 and transformer T51, and transformer T51 secondary winding releases energy to the 3rd capacitor C 3 through the 3rd diode D53; When the switch periods that detects switching tube when controller becomes second ratio with the current duration of transformer T51 secondary winding; Controller sends the drive signal of its conducting of control to switching tube through its output; At this moment; Input current Iin flow through successively inductance L 51, the second diode D52 and switching tube Q51, the former limit winding of transformer T51 be by 52 power supplies of second capacitor C, the electric current I t that flows through the former limit of the transformer T51 winding switching tube Q51 that also flows through.
Through comparison above-mentioned disclosed control circuit of the present invention and existing controller, can find:
In the prior art, only be that the current sampling signal of the switching tube of flowing through is sent into controller, when current sampling signal reached current threshold Ipk, controller can turn-off by the control switch pipe, and therefore, the current peak envelope of the switching tube of flowing through is shown in the Ipk among Fig. 7.
Among the present invention current sampling signal Is and ripple signal Ic stack with the switching tube of flowing through; Current sample input signal as controller; When said current sample input signal reaches current threshold Ipk; Controller is just understood the control switch pipe and is turn-offed, and therefore, actual flow through the peak envelope line of the current sampling signal Is of switching tube as shown in Figure 7.Can see that through Fig. 7 at any time, current sampling signal Is and ripple signal Ic sum equal current threshold Ipk, are equivalent to compensate for the current peak of switching tube Q51 the ripple of a low frequency.
In the control circuit disclosed by the invention; At ripple signal of current sample input compensation of controller, thereby be the ripple of the low frequency of peak current compensation of switching tube Q51, this low-frequency ripple makes former input current near peak value, reduce, raise (as shown in Figure 8 at zero cross near; The input current of Iin when not compensating in Fig. 8; Ix is the low-frequency ripple that is superimposed upon on the switching tube Q51, and Iin ' is the input current after compensating), the input current that promptly obtains after the compensation is more near sinusoidal wave; Reduce the distortion degree, thereby reached the purpose that reduces the constant-current source circuit total harmonic distortion, improves the power factor of circuit.
In the enforcement, the ripple generative circuit in the control circuit can also see also Fig. 6 for other structures.This ripple generative circuit comprises auxiliary winding, the 4th diode D54, the 4th capacitor C 54, second resistance R 52, the 3rd resistance R 53 and the 5th capacitor C 55.
Wherein, auxiliary winding is positioned at the former limit winding side of transformer T51; The anode of the 4th diode D54 is connected to the end that different name end, the negative electrode of assisting winding are connected to the 4th capacitor C 54, and the other end of the 4th capacitor C 54 is connected to the end of the same name of auxiliary winding; Be parallel to the two ends of the 4th capacitor C 54 after second resistance R 52 and 53 series connection of the 3rd resistance R; One end of the 5th capacitor C 55 is connected to the common port of second resistance R 52 and the 3rd resistance R 53.
The amplitude of the current signal of input controller current sample input can not be too high; Ripple generative circuit in constant-current source circuit shown in Figure 6; Further be provided with second resistance R 52 and the 3rd resistance R 53; When the input voltage Vf of auxiliary winding generation is higher,, can reduce the amplitude of the current signal of final input controller current sample input through the dividing potential drop effect of second resistance R 52 and the 3rd resistance R 53.
Above-mentioned description to the control circuit 26S Proteasome Structure and Function all is to combine the main circuit in the constant-current source circuit shown in Figure 1 to carry out.Need to prove that above-mentioned disclosed each control circuit of the present invention is equally applicable to the main circuit in the constant-current source circuit shown in Figure 2.Describe below in conjunction with Fig. 9, Fig. 9 is the circuit diagram of another kind of constant-current source circuit disclosed by the invention.
This constant-current source circuit comprises main circuit and control circuit.
Main circuit comprises input branch road and converter.The input branch road comprises the rectification circuit and first capacitor C 91; Converter comprises inductance L 91, the first diode D91, second capacitor C 92, the second diode D92, switching tube Q91, first resistance R 91, transformer T91, the 3rd diode D93 and the 3rd capacitor C 93, and winding is provided with tap on the former limit of transformer T91.Wherein, the positive output end of rectification circuit passes through first capacitor C, 91 ground connection, simultaneously the negative output terminal ground connection of rectification circuit; One end of inductance L 91 is connected to the anode of the second diode D92 as input, the other end of constant-current source circuit; The negative electrode of the second diode D92 is connected to the tap terminals of transformer T91; Different name end, second end that first end of switching tube Q91 is connected to transformer T91 pass through first resistance R, 91 ground connection; An end, negative electrode that the anode of the first diode D91 is connected to said inductance L 91 pass through second capacitor C, 92 ground connection; The end of the same name of the former limit of transformer T91 winding is connected to the common port of the first diode D91 and second capacitor C 92; The different name end of transformer T91 secondary winding is connected to the end that the anode of the 3rd diode D93, end of the same name are connected to the 3rd capacitor C 93, and the negative electrode of the 3rd diode D93 is connected with the other end of the 3rd capacitor C 93, and the two ends of the 3rd capacitor C 93 are as the output of constant-current source circuit.
Control circuit comprises controller, ripple generative circuit and compensating circuit, and wherein, the ripple generative circuit comprises auxiliary winding, the 4th diode D54, the 4th capacitor C 54 and the 5th capacitor C 55, and compensating circuit comprises the 4th resistance R 54 and the 5th resistance R 55.Auxiliary winding is positioned at the former limit winding side of transformer T91, the end ground connection of the same name of auxiliary winding, and the output voltage of auxiliary winding becomes preset ratio with the output voltage of secondary winding, can adjust this preset ratio through the coil turn of adjusting auxiliary winding; The anode of the 4th diode D54 is connected to the end that different name end, the negative electrode of assisting winding are connected to the 4th capacitor C 54, and the other end of the 4th capacitor C 54 is connected to the end of the same name of auxiliary winding; Common port, the other end that one end of the 5th capacitor C 55 is connected to the 4th diode D54 and the 4th capacitor C 54 is connected to an end of the 5th resistance R 55, and the other end of the 5th resistance R 55 is connected to the current sample input of controller; One end of the 4th resistance R 54 is connected to second end of switching tube Q91, the current sample input that the other end is connected to controller; The output of controller is connected to the control end of switching tube Q91, and the voltage sample input of controller is connected to the secondary winding of transformer T91.
Certainly, the control circuit among Fig. 9 also can adopt the control circuit among Fig. 6 to replace.
The invention also discloses constant-current source circuit, this constant-current source circuit comprises the main circuit shown in Fig. 1 or Fig. 2, also comprises control circuit, and this control circuit is described any one control circuit of preamble of the present invention.Constant-current source circuit disclosed by the invention can reach the purpose that reduces total harmonic distortion, improves the power factor of circuit.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed device of embodiment, because it is corresponding with the embodiment disclosed method, so description is fairly simple, relevant part is partly explained referring to method and is got final product.
It will be understood by those skilled in the art that and to use in many different processes and the technology any one to come expression information, message and signal.For example, the message of mentioning in the above-mentioned explanation, information can be expressed as voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or above combination in any.
Claims (5)
1. a control circuit is used for the main circuit of constant-current source circuit is controlled, and it is characterized in that said control circuit comprises controller, ripple generative circuit and compensating circuit;
Said ripple generative circuit is used for obtaining with the output voltage of the converter of said main circuit and becomes the voltage signal of first ratio, and isolates the ripple signal in the said voltage signal;
Said compensating circuit is used for gathering the current sampling signal of the switching tube of said main circuit; And with the current sample input of sending into said controller after said ripple signal and the stack of said current sampling signal, as the current sample input signal of said controller;
Said controller receives the current sample input signal of said compensating circuit output; When said current sample input signal reaches current threshold; Controlling said switching tube turn-offs; Said controller detects the current duration of the transformer secondary winding in the said main circuit, when the switch periods of said switching tube becomes second ratio with said current duration, controls said switching tube conducting.
2. control circuit according to claim 1 is characterized in that, said ripple generative circuit comprises auxiliary winding, the 4th diode, the 4th electric capacity and the 5th electric capacity;
Said auxiliary winding is positioned at the former limit winding side of said transformer, the end ground connection of the same name of said auxiliary winding;
Different name end, the negative electrode that the anode of said the 4th diode is connected to said auxiliary winding is connected to an end of said the 4th electric capacity, and the other end of said the 4th electric capacity is connected to the end of the same name of said auxiliary winding;
One end of said the 5th electric capacity is connected to the common port of said the 4th diode and the 4th electric capacity, and the other end of said the 5th electric capacity is exported said ripple signal.
3. control circuit according to claim 1 is characterized in that, said ripple generative circuit comprises auxiliary winding, the 4th diode, the 4th electric capacity, second resistance, the 3rd resistance and the 5th electric capacity;
Said auxiliary winding is positioned at the former limit winding side of said transformer, the end ground connection of the same name of said auxiliary winding;
Different name end, the negative electrode that the anode of said the 4th diode is connected to said auxiliary winding is connected to an end of said the 4th electric capacity, and the other end of said the 4th electric capacity is connected to the end of the same name of said auxiliary winding;
Be parallel to the two ends of said the 4th electric capacity after said second resistance and the series connection of the 3rd resistance;
One end of said the 5th electric capacity is connected to the common port of said second resistance and the 3rd resistance, and the other end of said the 5th electric capacity is exported said ripple signal.
4. according to claim 2 or 3 described control circuits, it is characterized in that said compensating circuit comprises the 4th resistance and the 5th resistance;
One end of said the 4th resistance is connected to second end of said switching tube, the current sample input that the other end is connected to said controller;
One end of said the 5th resistance is connected to the other end of said the 5th electric capacity, the current sample input that the other end is connected to said controller.
5. a constant-current source circuit comprises main circuit and control circuit, it is characterized in that, said control circuit is each described control circuit in the claim 1 to 4.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840647A (en) * | 2014-03-18 | 2014-06-04 | 矽力杰半导体技术(杭州)有限公司 | Current filter circuit and power supply converter |
| CN104485816A (en) * | 2014-12-15 | 2015-04-01 | 矽力杰半导体技术(杭州)有限公司 | Interleaved switching power supply and control method thereof |
| CN104967298A (en) * | 2015-08-06 | 2015-10-07 | 电子科技大学 | Ripple wave compensation control circuit used for DC-DC converter |
| WO2017128773A1 (en) * | 2016-01-29 | 2017-08-03 | 南通米兰特电气有限公司 | Hibernation control method and structure for control transformer |
| CN107257195A (en) * | 2017-08-16 | 2017-10-17 | 英飞特电子（杭州）股份有限公司 | A kind of controlled resonant converter |
| CN108631578A (en) * | 2017-03-21 | 2018-10-09 | 意法半导体股份有限公司 | Operate in the control unit of the switch converters of continuous conduction and Peak Current-Mode Controlled Circuit |
| CN108983141A (en) * | 2018-05-07 | 2018-12-11 | 浙江涵普电力科技有限公司 | The DC voltage and ripple voltage synthesizer of direct current energy meter |
| CN109406860A (en) * | 2018-12-24 | 2019-03-01 | 厦门能瑞康电子有限公司 | A kind of voltage sampling circuit |
| CN110277922A (en) * | 2019-05-17 | 2019-09-24 | 杭州电子科技大学 | A kind of LLC primary side constant-current control device and compensating current signal extracting method |
| CN111405719A (en) * | 2020-03-27 | 2020-07-10 | 杰华特微电子（杭州）有限公司 | BIFRED converter, control method thereof and L ED driving circuit applying BIFRED converter |
| CN112087129A (en) * | 2020-09-10 | 2020-12-15 | 广州金升阳科技有限公司 | Power factor correction circuit and correction method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH033666A (en) * | 1989-05-29 | 1991-01-09 | Sansha Electric Mfg Co Ltd | Switching power supply |
| US20080067994A1 (en) * | 2006-09-18 | 2008-03-20 | Kesterson John W | Constant Current Mode Ripple Attenuation Method In Flyback Power Supply |
| US20100208500A1 (en) * | 2009-02-19 | 2010-08-19 | Iwatt Inc. | Detecting Light Load Conditions and Improving Light Load Efficiency in a Switching Power Converter |
| CN102299630A (en) * | 2010-06-25 | 2011-12-28 | 电力集成公司 | Power converter with compensation circuit for adjusting output current provided to a constant load |
| CN202334312U (en) * | 2011-07-01 | 2012-07-11 | 无锡虹光半导体技术有限公司 | Peak-current compensation circuit for constant-current output switching power supply |
-
2012
- 2012-09-18 CN CN201210346519.6A patent/CN102843039B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH033666A (en) * | 1989-05-29 | 1991-01-09 | Sansha Electric Mfg Co Ltd | Switching power supply |
| US20080067994A1 (en) * | 2006-09-18 | 2008-03-20 | Kesterson John W | Constant Current Mode Ripple Attenuation Method In Flyback Power Supply |
| US20100208500A1 (en) * | 2009-02-19 | 2010-08-19 | Iwatt Inc. | Detecting Light Load Conditions and Improving Light Load Efficiency in a Switching Power Converter |
| CN102299630A (en) * | 2010-06-25 | 2011-12-28 | 电力集成公司 | Power converter with compensation circuit for adjusting output current provided to a constant load |
| CN202334312U (en) * | 2011-07-01 | 2012-07-11 | 无锡虹光半导体技术有限公司 | Peak-current compensation circuit for constant-current output switching power supply |
Non-Patent Citations (1)
| Title |
|---|
| 李学亮等: "基于纹波电压补偿的单相PWM可逆整流器的研究", 《电气技术》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840647A (en) * | 2014-03-18 | 2014-06-04 | 矽力杰半导体技术(杭州)有限公司 | Current filter circuit and power supply converter |
| CN104485816A (en) * | 2014-12-15 | 2015-04-01 | 矽力杰半导体技术(杭州)有限公司 | Interleaved switching power supply and control method thereof |
| CN104967298A (en) * | 2015-08-06 | 2015-10-07 | 电子科技大学 | Ripple wave compensation control circuit used for DC-DC converter |
| CN104967298B (en) * | 2015-08-06 | 2017-05-31 | 电子科技大学 | A kind of ripple compensation for DC DC converters controls circuit |
| WO2017128773A1 (en) * | 2016-01-29 | 2017-08-03 | 南通米兰特电气有限公司 | Hibernation control method and structure for control transformer |
| CN108631578B (en) * | 2017-03-21 | 2022-05-13 | 意法半导体股份有限公司 | Control unit for switching converter operating in continuous conduction and peak current control mode |
| CN108631578A (en) * | 2017-03-21 | 2018-10-09 | 意法半导体股份有限公司 | Operate in the control unit of the switch converters of continuous conduction and Peak Current-Mode Controlled Circuit |
| US11336172B2 (en) | 2017-03-21 | 2022-05-17 | Stmicroelectronics S.R.L. | Control unit of a switching converter operating in continuous-conduction and peak-current-control mode |
| US10727734B2 (en) | 2017-03-21 | 2020-07-28 | Stmicroelectronics S.R.L. | Control unit of a switching converter operating in continuous-conduction and peak-current-control mode |
| CN107257195A (en) * | 2017-08-16 | 2017-10-17 | 英飞特电子（杭州）股份有限公司 | A kind of controlled resonant converter |
| CN107257195B (en) * | 2017-08-16 | 2023-08-18 | 英飞特电子（杭州）股份有限公司 | Resonant converter |
| CN108983141A (en) * | 2018-05-07 | 2018-12-11 | 浙江涵普电力科技有限公司 | The DC voltage and ripple voltage synthesizer of direct current energy meter |
| CN109406860A (en) * | 2018-12-24 | 2019-03-01 | 厦门能瑞康电子有限公司 | A kind of voltage sampling circuit |
| CN110277922A (en) * | 2019-05-17 | 2019-09-24 | 杭州电子科技大学 | A kind of LLC primary side constant-current control device and compensating current signal extracting method |
| CN111405719A (en) * | 2020-03-27 | 2020-07-10 | 杰华特微电子（杭州）有限公司 | BIFRED converter, control method thereof and L ED driving circuit applying BIFRED converter |
| CN111405719B (en) * | 2020-03-27 | 2023-10-27 | 杰华特微电子股份有限公司 | BIFRED converter, control method thereof and LED driving circuit applying BIFRED converter |
| CN112087129A (en) * | 2020-09-10 | 2020-12-15 | 广州金升阳科技有限公司 | Power factor correction circuit and correction method thereof |
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