CN201766750U - Multi-way direct current supply circuit - Google Patents
Multi-way direct current supply circuit Download PDFInfo
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- CN201766750U CN201766750U CN2010202833430U CN201020283343U CN201766750U CN 201766750 U CN201766750 U CN 201766750U CN 2010202833430 U CN2010202833430 U CN 2010202833430U CN 201020283343 U CN201020283343 U CN 201020283343U CN 201766750 U CN201766750 U CN 201766750U
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Abstract
The utility model discloses a multi-way direct current supply circuit which comprises a main transformer and a first rectifying and filtering unit; the main transformer comprises a primary winding and a secondary winding; the primary winding of the main transformer and a first switch are connected in series into input voltage; a power supply circuit comprises the secondary winding of the main transformer, the first rectifying and filtering unit and a current equalizing capacitor; and in the first rectifying and filtering unit, the first input terminal of the first rectifying and filtering unit is connected with the second input terminal of the first rectifying and filtering unit respectively through a first diode, a second capacitor and a fourth diode in sequence, and the second input terminal of the first rectifying and filtering unit is connected with the first input terminal of the first rectifying and filtering unit respectively through a third diode, a first inductor, a first capacitor and a second diode in sequence. The multi-way direct current supply circuit can be suitable for the low-cost occasion when only one switch tube is arranged on the primary side of the main transformer.
Description
Technical field
The utility model relates to the direct current supply technology, relates in particular to a kind of multi-channel DC power supply circuits.
Background technology
At present, for the LED constant current control that multichannel light-emitting diode (LED) drives, the most frequently used scheme is constant voltage module+multichannel non-isolation DC/DC constant flow module.
Be illustrated in figure 1 as the LED constant-current control circuit that LED multi-path drives in the prior art.In this circuit, as the input of multichannel non-isolation DC/DC constant flow module, every road non-isolation DC/DC constant flow module is done constant current control separately after the input voltage Vac process constant voltage module.But because the voltage of constant voltage module and the voltage of LED generally have bigger pressure reduction, therefore the efficient of back level multichannel non-isolation DC/DC constant flow module can be too not high, and multichannel non-isolation DC/DC constant flow module complex structure, and cost is higher.
Application number is in 200910155848.0 the Chinese patent, a kind of drive circuit of realizing the two paths of LED accurate constant current is provided, concrete circuit structure as shown in Figure 2, but in this drive circuit, the structure of dual switch is adopted on the former limit of transformer, alternate conduction by switching tube S1, S2 produces alternating voltage at the secondary of transformer, thereby realizes the power supply of this drive circuit.Because dual switch is used on the former limit of main transformer in this drive circuit, needs complicated drive circuit, therefore, realize that cost is higher; And above-mentioned drive circuit also is not suitable for the occasion that the former limit of main transformer such as inverse-excitation converting circuit for example has only a switching tube.
The utility model content
In view of this, the technical problems to be solved in the utility model is, a kind of multi-channel DC power supply circuits are provided, and goes for the low-cost occasion that the former limit of main transformer has only a switching tube.
For this reason, the utility model embodiment adopts following technical scheme:
The utility model provides a kind of two-way DC power-supply circuit, comprising: main transformer and one first rectification filtering unit; Wherein,
Described main transformer comprises a former limit winding and a secondary winding; The former limit winding and first switch series of main transformer are connected to input voltage;
The secondary winding of main transformer and first rectification filtering unit and a current-sharing electric capacity constitute current supply circuit;
Described first rectification filtering unit comprises: the first input end of first rectification filtering unit connects second input of first rectification filtering unit by first diode, second electric capacity and the 4th diode of serial connection; Second input of first rectification filtering unit connects the first input end of first rectification filtering unit by the 3rd diode, first inductance, first electric capacity and second diode of serial connection.
Wherein, second diode is connected with the anode of the 4th diode; Perhaps,
First diode is connected with the negative electrode of the 3rd diode.
Described current supply circuit comprises: the different name end of the secondary winding of main transformer connects the first input end of first rectification filtering unit, and second input of first rectification filtering unit connects the end of the same name of this secondary winding by current-sharing electric capacity;
Perhaps, described current supply circuit comprises: the different name end of the secondary winding of main transformer connects the first input end of first rectification filtering unit by current-sharing electric capacity, and second input of first rectification filtering unit connects the end of the same name of this secondary winding.
A kind of multi-channel DC power supply circuits comprise: main transformer and at least two first rectification filtering units; Wherein, described main transformer comprises a former limit winding and a secondary winding, and the described former limit winding and first switch series are connected to input voltage;
Corresponding one first current supply circuit of each first rectification filtering unit; Each described first current supply circuit is made of the secondary winding of main transformer, first rectification filtering unit and a current-sharing electric capacity;
Between two the first adjacent current supply circuits first current-sharing transformer is set; Two windings of this first current-sharing transformer lay respectively in two first current supply circuits, are used for carrying out the current-sharing of two first current supply circuit electric currents;
Described first rectification filtering unit comprises: the first input end of first rectification filtering unit connects second input of first rectification filtering unit by first diode, second electric capacity and the 4th diode of serial connection; Second input of first rectification filtering unit connects the first input end of first rectification filtering unit by the 3rd diode, first inductance, first electric capacity and second diode of serial connection.
Wherein, described second diode is connected with the anode of the 4th diode; Perhaps,
Described first diode is connected with the negative electrode of the 3rd diode.
Described first current supply circuit comprises: the different name end of the secondary winding of main transformer connects the first input end of first rectification filtering unit, and second input of first rectification filtering unit connects the end of the same name of this secondary winding by current-sharing electric capacity;
Perhaps, described first current supply circuit comprises: the different name end of the secondary winding of main transformer connects the first input end of first rectification filtering unit by current-sharing electric capacity, and second input of first rectification filtering unit connects the end of the same name of this secondary winding.
Two windings of described first current-sharing transformer are arranged at respectively between the first input end of the different name end of secondary winding in corresponding first current supply circuit and first rectification filtering unit,
Perhaps, two of described first current-sharing transformer windings are arranged at respectively between second input of the end of the same name of secondary winding in corresponding first current supply circuit and first rectification filtering unit.
Also comprise: second rectification filtering unit that constitutes by the 5th diode and the 3rd capacitances in series; Wherein,
The secondary winding of second rectification filtering unit and main transformer constitutes second current supply circuit; Between described second current supply circuit and adjacent one first current supply circuit current-sharing transformer is set, first winding of this current-sharing transformer is arranged in first current supply circuit, second winding is arranged in second current supply circuit, is used for carrying out the current-sharing of first current supply circuit and the second current supply circuit electric current.
A kind of multi-channel DC power supply circuits comprise: main transformer, described main transformer comprise a former limit winding and at least two secondary windings; The described former limit winding and first switch series are connected to input voltage;
Corresponding one first rectification filtering unit of each secondary winding and a current-sharing electric capacity constitute the 3rd current supply circuit;
Between two the 3rd adjacent current supply circuits the 3rd current-sharing transformer is set; Two windings of the 3rd current-sharing transformer lay respectively in two the 3rd current supply circuits, are used for carrying out the current-sharing of two the 3rd current supply circuit electric currents;
Described first rectification filtering unit comprises: the first input end of first rectification filtering unit connects second input of first rectification filtering unit by first diode, second electric capacity and the 4th diode of serial connection; Second input of first rectification filtering unit connects the first input end of first rectification filtering unit by the 3rd diode, first inductance, first electric capacity and second diode of serial connection.
Wherein, described second diode is connected with the anode of the 4th diode; Perhaps,
The negative electrode of described first diode and the 3rd diode is connected.
Described the 3rd current supply circuit comprises: the different name end of the secondary winding of main transformer connects the first input end of first rectification filtering unit, and second input of first rectification filtering unit connects the end of the same name of this secondary winding by current-sharing electric capacity;
Perhaps, described the 3rd current supply circuit comprises: the different name end of the secondary winding of main transformer connects the first input end of first rectification filtering unit by current-sharing electric capacity, and second input of first rectification filtering unit connects the end of the same name of this secondary winding.
Two windings of described the 3rd current-sharing transformer are arranged at respectively between the first input end of the different name end of secondary winding in corresponding the 3rd current supply circuit and first rectification filtering unit;
Perhaps, two of described the 3rd current-sharing transformer windings are arranged at respectively between second input of the end of the same name of secondary winding in corresponding the 3rd current supply circuit and first rectification filtering unit.
Also comprise: second rectification filtering unit that constitutes by the 5th diode and the 3rd capacitances in series; Wherein,
A secondary winding of the corresponding main transformer of second rectification filtering unit constitutes second current supply circuit with this secondary winding; Between described second current supply circuit and adjacent one the 3rd current supply circuit current-sharing transformer is set, first winding of this current-sharing transformer is arranged in the 3rd current supply circuit, second winding is arranged in second current supply circuit, is used for carrying out the current-sharing of the 3rd current supply circuit and the second current supply circuit electric current.
Technique effect for technique scheme is analyzed as follows:
In the above two-way DC power-supply circuit, former limit has only one first switch promptly can realize the current-sharing of secondary multichannel output, realizes that cost is low; And during owing to former limit first switch conduction and shutoff, secondary is powered to DC load by the different rectification filtering circuit of two-way, can realize the two-way utilization of main transformer, reduces volume of transformer, raises the efficiency; The current-sharing electric capacity and first inductance constitute resonant tank, can realize the Zero Current Switch of secondary rectification filtering circuit, reduce the diode reverse recovery loss, help reducing battery and disturb (EMI).
Description of drawings
Fig. 1 is a prior art LED constant-current control circuit structural representation;
Fig. 2 is a kind of two paths of LED accurate constant current of prior art driving circuit structure schematic diagram;
Fig. 3 is first kind of two-way DC power-supply circuit of the utility model structural representation;
Fig. 3 a is the another kind of two-way DC power-supply circuit of a utility model structural representation;
Fig. 4 is first kind of even number road of the utility model multi-channel DC power supply circuit construction schematic diagram;
Fig. 4 a is second kind of even number road of the utility model multi-channel DC power supply circuit construction schematic diagram;
Fig. 4 b is first kind of odd number road of the utility model multi-channel DC power supply circuit construction schematic diagram;
Fig. 4 c is second kind of odd number road of the utility model multi-channel DC power supply circuit construction schematic diagram;
Fig. 5 a is the third even number road multi-channel DC power supply circuit construction schematic diagram of the utility model;
Fig. 5 b is the third odd number road multi-channel DC power supply circuit construction schematic diagram of the utility model;
Fig. 6 is second kind of two-way DC power-supply circuit of the utility model structural representation.
Embodiment
Below, be described with reference to the accompanying drawings the realization of the utility model embodiment multi-channel DC power supply circuits.
As shown in Figure 3, the utility model embodiment provides a kind of two-way DC power-supply circuit, wherein, comprises main transformer Ta1 and one first rectification filtering unit; Wherein,
Main transformer Ta1 comprises a former limit winding and a secondary winding; The former limit winding of main transformer Ta1 and first switch S 1 are serially connected with between the positive and negative terminal of input voltage Vdc; The different name end of the secondary winding of main transformer Ta1 connects the first input end t1 of first rectification filtering unit, and the second input t2 of first rectification filtering unit connects the end of the same name of this secondary winding by current-sharing capacitor C d1, thereby constitutes current supply circuit; Certainly, in actual applications, current-sharing capacitor C d1 also can be connected between the first input end t1 of the different name end of secondary winding and first rectification filtering unit, can realize the utility model too.
Described first rectification filtering unit comprises: the first input end t1 of first rectification filtering unit connects the second input t2 of first rectification filtering unit successively by the first diode D1, second capacitor C 2 and the 4th diode D4; The second input t2 of first rectification filtering unit connects the first input end t1 of first rectification filtering unit successively by the 3rd diode D3, first inductance L 1, first capacitor C 1 and the second diode D2.
Wherein, the second diode D2 can be connected with the anode of the 4th diode D4, perhaps, the negative electrode of the first diode D1 and the 3rd diode D3 can be connected, the negative electrode of the 6th diode D6 and the 8th diode D8 promptly interconnects in the circuit as shown in Figure 6, at this moment, still can realize described circuit of the present utility model.
Wherein, the two ends of first capacitor C 1 of first rectification filtering unit can be used as the first output O1 and the second output O2 of first rectification filtering unit, are used to first DC load branch road A1 power supply; The two ends of second capacitor C 2 of first rectification filtering unit are used to second DC load branch road A2 power supply as the 3rd output O3 and the 4th output O4 of first rectification filtering unit.
The above-mentioned DC load branch road LED load branch that several LED constitute of can serving as reasons can certainly be other DC load branch roads that constitute by DC load.
The principle of two-way DC power-supply circuit shown in Figure 3 is:
When first switch S 1 on former limit is turn-offed, first rectification filtering circuit that the first diode D1 of secondary, the 4th diode D4 and first capacitor C 1 are formed, give the first DC load branch road A1 power supply, when first switch S, 1 conducting on former limit, the second diode D2 of secondary, the 3rd diode D3 and first inductance L 1 and second capacitor C 2 are formed second rectification filtering circuit, give the second DC load branch road A2 power supply, described current-sharing capacitor C d1 is connected on the input of two-way rectification filtering circuit.The anode of the second diode D2 and the 4th diode D4 links together, and is called common anode and connects.
Because the existence of current-sharing capacitor C d1, when the pressure drop of two-way DC load branch road not simultaneously, can make the current average of two-way DC load branch road equal by the voltage difference of current-sharing capacitor C d1 balance two-way DC load branch road.
In the above two-way DC power-supply circuit, former limit has only one first switch S 1 promptly can realize the current-sharing of secondary multichannel output, realizes that cost is low; And during owing to former limit first switch S, 1 turn-on and turn-off, secondary is powered to DC load by the different rectification filtering circuit of two-way, can realize the two-way utilization of main transformer, reduces volume of transformer, raises the efficiency; In addition, magnetic core of transformer only needs very little air gap, and inductance value is bigger, and leakage inductance is very little, and former limit is very little as the spike stress of the switching tube of first switch, does not need extra absorption circuit.The current-sharing capacitor C d1 and first inductance L 1 constitute resonant tank, can realize the Zero Current Switch of secondary rectification filtering circuit, reduce the diode reverse recovery loss, help reducing EMI.
In addition, the leakage inductance Lr of main transformer Ta1 also can participate in the resonance of the current-sharing capacitor C d1 and first inductance L 1, in some occasion, the size of leakage inductance Lr by control main transformer Ta1 is suitable value, first inductance L 1 even can remove shown in Fig. 3 a, no longer describes in detail here.
In addition, circuit shown in Figure 3 can also be used to the power factor correcting circuit, and input voltage Vdc is the voltage with low frequency pulsating.
Two-way DC power-supply circuit shown in Figure 3 can also expand to the multi-channel DC power supply circuits, is divided into: the multi-channel DC power supply circuits on even number road and the multi-channel DC power supply circuits on odd number road; Wherein,
As shown in Figure 4, for the multi-channel DC power supply circuit construction schematic diagram on a kind of even number road, comprising at least two first rectification filtering units; And in this circuit, main transformer Ta1 comprises a former limit winding and a secondary winding;
Corresponding one first current supply circuit of each first rectification filtering unit; Described first current supply circuit comprises: the different name end of main transformer Ta1 secondary winding connects the first input end t1 of first rectification filtering unit, and the second input t2 of first rectification filtering unit connects the end of the same name of secondary winding by a current-sharing capacitor C d1.Certainly, in actual applications, current-sharing capacitor C d1 also can be connected between the first input end t1 of the different name end of secondary winding and first rectification filtering unit, thereby constitutes described first current supply circuit.
At this moment, between two first adjacent current supply circuits, be provided with one first current-sharing transformer; Two windings of this first current-sharing transformer lay respectively in two first current supply circuits, concrete, between the first input end t1 of the different name end that each winding is arranged at main transformer Ta1 secondary winding respectively and the first corresponding rectification filtering unit, and, its connection need make the end of the same name of two windings of current-sharing transformer, the current opposite in direction that flows through at synchronization; Described first current-sharing transformer is used for: carry out the current-sharing of two first current supply circuit electric currents.Perhaps, two windings of described first current-sharing transformer also can be arranged at respectively between second input of the end of the same name of secondary winding in corresponding first current supply circuit and first rectification filtering unit, and, its connection need make the end of the same name of two windings of current-sharing transformer, at this moment current opposite in direction in that synchronization flows through can realize the current-sharing of electric current in two first current supply circuits equally.
The current-sharing principle of first current-sharing transformer is in the circuit shown in Figure 4: two windings of first current-sharing transformer are connected in series respectively in the adjacent duplex feeding loop.The two-way in-phase current flows through the end of the same name and the non-same polarity of two windings of current-sharing transformer respectively; When the no-load voltage ratio of current-sharing transformer is n: m, the ratio that flows through the electric current of two winding ends of the same name of current-sharing transformer and non-same polarity is not equal to m: during n, then the exciting curent of current-sharing transformer is non-vanishing, the alternating voltage that exciting curent produces at the current-sharing transformer two ends is with the pressure reduction of two circuit units of autobalance, making the ratio balance of two winding currents of current-sharing transformer is m: n, thereby realizes the current balance control between the adjacent duplex feeding loop; When m=n, realize the sharing control of two circuit units.
In the even number road multi-channel DC power supply circuits shown in Figure 4, each first rectification filtering unit can be powered for two-way DC load branch road.Electric current between two rectification filtering circuits that comprise in each current supply circuit carries out current-sharing by current-sharing electric capacity; And the electric current between the different current supply circuits carries out current-sharing by current-sharing transformer.
In addition, in actual applications can also be with the plus earth of second diode and the 4th diode, at this moment, shown in Fig. 4 a, also need to be provided with one second current-sharing transformer between the first adjacent current supply circuit, between second input of the end of the same name that two windings of this second current-sharing transformer are arranged at secondary winding in the first corresponding current supply circuit respectively and the first corresponding rectification filtering unit, concrete, in the circuit of Fig. 4 a, described two windings are arranged at respectively between corresponding the secondary winding end of the same name and current-sharing electric capacity, to realize the electric current current-sharing between adjacent first current supply circuit.
In addition, shown in Fig. 4 b and 4c, be the DC power-supply circuit on odd number road, this circuit structure is similar with the multi-channel DC power supply circuits on the even number road shown in Fig. 4 and Fig. 4 a respectively, and difference is, also comprises:
One second rectification filtering unit that constitutes by the 5th diode D5 and the series connection of the 3rd capacitor C 3; The secondary winding of this second rectification filtering unit and main transformer Ta1 constitutes second current supply circuit; Between described second current supply circuit and adjacent one first current supply circuit current-sharing transformer Tw is set, first winding of this current-sharing transformer Tw is arranged in first current supply circuit, second winding is arranged in second current supply circuit, is used for carrying out the current-sharing of first current supply circuit and the second current supply circuit electric current.
In addition, as Fig. 5 a, the main transformer Ta1 among Fig. 4 a can also replace with the main transformer Ta2 that comprises a former limit winding and at least two secondary windings, at this moment,
Corresponding one first rectification filtering unit of each secondary winding and a current-sharing electric capacity constitute one the 3rd current supply circuit respectively; Described the 3rd current supply circuit comprises: the different name end of secondary winding connects the first input end t1 of the first corresponding rectification filtering unit, and the second input t2 of first rectification filtering unit connects the end of the same name of this secondary winding by current-sharing electric capacity;
Between two the 3rd adjacent current supply circuits one the 3rd current-sharing transformer is set; Two windings of the 3rd current-sharing transformer lay respectively in two the 3rd current supply circuits, are used for carrying out the current-sharing of two the 3rd current supply circuit electric currents.Concrete, described the 3rd current-sharing transformer is arranged at respectively between the first input end of the different name end of secondary winding and first rectification filtering unit.Perhaps, two windings of described the 3rd current-sharing transformer also can be arranged at respectively between second input of the end of the same name of secondary winding in the 3rd corresponding current supply circuit and first rectification filtering unit, and, its connection need make the end of the same name of two windings of current-sharing transformer, at this moment current opposite in direction in that synchronization flows through can realize the current-sharing of electric current in two the 3rd current supply circuits equally.
Shown in Fig. 5 a, described second diode D2 in each first rectification filtering unit and the anode of the 4th diode D4 can ground connection.
Shown in Fig. 5 b, when main transformer Ta2 is when comprising the transformer of a former limit winding and at least two secondary windings, also can expand to the multi-channel DC power supply circuits on odd number road, wherein, the secondary winding of the also corresponding main transformer Ta2 of second rectification filtering unit that is made of the 5th diode D5 and the series connection of the 3rd capacitor C 3 constitutes second current supply circuit with this secondary winding; Between described second current supply circuit and adjacent one the 3rd current supply circuit current-sharing transformer is set, first winding of this current-sharing transformer is arranged in the 3rd current supply circuit, second winding is arranged in second current supply circuit, is used for carrying out the current-sharing of the 3rd current supply circuit and the second current supply circuit electric current.Same, in the circuit shown in Fig. 5 b, second diode D2 in first rectification filtering unit and the anode of the 4th diode D4 can ground connection.
Among above Fig. 3～Fig. 5 b, two-way DC load branch road anode altogether connects, and as shown in Figure 6, provides a kind of two-way DC power-supply circuit, and two-way DC load branch road common cathode connects.As shown in Figure 6, this circuit comprises:
Main transformer Ta1 comprises a former limit winding and a secondary winding; The former limit winding of main transformer Ta1 and first switch S 1 are serially connected with input voltage Vdc; The different name end of the secondary winding of main transformer Ta1 connects the first input end t1 of the 3rd rectification filtering unit, and the second input t2 of the 3rd rectification filtering unit connects the end of the same name of this secondary winding by a current-sharing capacitor C d;
Described the 3rd rectification filtering unit comprises: the first input end t1 of the 3rd rectification filtering unit connects the second input t2 of the 3rd rectification filtering unit successively by the 6th diode D6, the 4th capacitor C 4 and the 9th diode D9; The second input t2 of the 3rd rectification filtering unit connects the first input end t1 of the 3rd rectification filtering unit successively by the 8th diode D8, the 5th capacitor C 5, second inductance L 2 and the 7th diode D7; And the negative electrode of the 6th diode D6 and the 8th diode D8 is connected, and is called common cathode and connects.
Wherein, the two ends of the 4th capacitor C 4 of the 3rd rectification filtering unit are used to the power supply of the first DC load branch road as the first output O1 and the second output O2 of the 3rd rectification filtering unit; The two ends of the 5th capacitor C 5 of the 3rd rectification filtering unit are used to the power supply of the second DC load branch road as the 3rd output and the 4th output of the 3rd rectification filtering unit.
Current-sharing principle and Fig. 3 of Fig. 6 are similar, repeat no more here.
In addition, corresponding with Fig. 4 a～Fig. 5 b, two-way DC power-supply circuit shown in Figure 6 also can expand to the multi-channel DC power supply circuits on even number road and the multi-channel DC power supply circuits on odd number road; Wherein,
When main transformer includes only a former limit winding and a secondary winding, the circuit structure of the even number road multi-channel DC power supply circuits of the described two-way DC power-supply circuit of Fig. 6 correspondence is similar to Fig. 4, the circuit structure of odd number road multi-channel DC power supply circuits is similar to Fig. 4 b, and difference only is first rectification filtering unit among Fig. 4 and Fig. 4 b is replaced with the 3rd rectification filtering unit.
When main transformer comprises a former limit winding and at least two secondary windings, the circuit structure of the even number road multi-channel DC power supply circuits of the two-way DC power-supply circuit correspondence of Fig. 6 is similar to Fig. 5 a, the circuit structure of odd number road multi-channel DC power supply circuits is similar to Fig. 5 b, difference only is: first rectification filtering unit among Fig. 5 a and Fig. 5 b is replaced with the 3rd rectification filtering unit, and the negative electrode of the 6th diode D6 and the 8th diode D8 is earth-free.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (13)
1. a two-way DC power-supply circuit is characterized in that, comprising: main transformer and one first rectification filtering unit; Wherein,
Described main transformer comprises a former limit winding and a secondary winding; The former limit winding and first switch series of main transformer are connected to input voltage;
The secondary winding of main transformer and first rectification filtering unit and a current-sharing electric capacity constitute current supply circuit;
Described first rectification filtering unit comprises: the first input end of first rectification filtering unit connects second input of first rectification filtering unit by first diode, second electric capacity and the 4th diode of serial connection; Second input of first rectification filtering unit connects the first input end of first rectification filtering unit by the 3rd diode, first inductance, first electric capacity and second diode of serial connection.
2. circuit according to claim 1 is characterized in that, second diode is connected with the anode of the 4th diode; Perhaps,
First diode is connected with the negative electrode of the 3rd diode.
3. circuit according to claim 1 and 2, it is characterized in that, described current supply circuit comprises: the different name end of the secondary winding of main transformer connects the first input end of first rectification filtering unit, and second input of first rectification filtering unit connects the end of the same name of this secondary winding by current-sharing electric capacity;
Perhaps, described current supply circuit comprises: the different name end of the secondary winding of main transformer connects the first input end of first rectification filtering unit by current-sharing electric capacity, and second input of first rectification filtering unit connects the end of the same name of this secondary winding.
4. multi-channel DC power supply circuits is characterized in that, comprising: main transformer and at least two first rectification filtering units; Wherein, described main transformer comprises a former limit winding and a secondary winding, and the described former limit winding and first switch series are connected to input voltage;
Corresponding one first current supply circuit of each first rectification filtering unit; Each described first current supply circuit is made of the secondary winding of main transformer, first rectification filtering unit and a current-sharing electric capacity;
Between two the first adjacent current supply circuits first current-sharing transformer is set; Two windings of this first current-sharing transformer lay respectively in two first current supply circuits, are used for carrying out the current-sharing of two first current supply circuit electric currents;
Described first rectification filtering unit comprises: the first input end of first rectification filtering unit connects second input of first rectification filtering unit by first diode, second electric capacity and the 4th diode of serial connection; Second input of first rectification filtering unit connects the first input end of first rectification filtering unit by the 3rd diode, first inductance, first electric capacity and second diode of serial connection.
5. circuit according to claim 4 is characterized in that, described second diode is connected with the anode of the 4th diode; Perhaps,
Described first diode is connected with the negative electrode of the 3rd diode.
6. circuit according to claim 4, it is characterized in that, described first current supply circuit comprises: the different name end of the secondary winding of main transformer connects the first input end of first rectification filtering unit, and second input of first rectification filtering unit connects the end of the same name of this secondary winding by current-sharing electric capacity;
Perhaps, described first current supply circuit comprises: the different name end of the secondary winding of main transformer connects the first input end of first rectification filtering unit by current-sharing electric capacity, and second input of first rectification filtering unit connects the end of the same name of this secondary winding.
7. circuit according to claim 6 is characterized in that, two windings of described first current-sharing transformer are arranged at respectively between the first input end of the different name end of secondary winding in corresponding first current supply circuit and first rectification filtering unit,
Perhaps, two of described first current-sharing transformer windings are arranged at respectively between second input of the end of the same name of secondary winding in corresponding first current supply circuit and first rectification filtering unit.
8. according to each described circuit of claim 4 to 7, it is characterized in that, also comprise: second rectification filtering unit that constitutes by the 5th diode and the 3rd capacitances in series; Wherein,
The secondary winding of second rectification filtering unit and main transformer constitutes second current supply circuit; Between described second current supply circuit and adjacent one first current supply circuit current-sharing transformer is set, first winding of this current-sharing transformer is arranged in first current supply circuit, second winding is arranged in second current supply circuit, is used for carrying out the current-sharing of first current supply circuit and the second current supply circuit electric current.
9. multi-channel DC power supply circuits is characterized in that, comprising: main transformer, described main transformer comprise a former limit winding and at least two secondary windings; The described former limit winding and first switch series are connected to input voltage;
Corresponding one first rectification filtering unit of each secondary winding and a current-sharing electric capacity constitute the 3rd current supply circuit;
Between two the 3rd adjacent current supply circuits the 3rd current-sharing transformer is set; Two windings of the 3rd current-sharing transformer lay respectively in two the 3rd current supply circuits, are used for carrying out the current-sharing of two the 3rd current supply circuit electric currents;
Described first rectification filtering unit comprises: the first input end of first rectification filtering unit connects second input of first rectification filtering unit by first diode, second electric capacity and the 4th diode of serial connection; Second input of first rectification filtering unit connects the first input end of first rectification filtering unit by the 3rd diode, first inductance, first electric capacity and second diode of serial connection.
10. circuit according to claim 9 is characterized in that, described second diode is connected with the anode of the 4th diode; Perhaps,
The negative electrode of described first diode and the 3rd diode is connected.
11. circuit according to claim 9, it is characterized in that, described the 3rd current supply circuit comprises: the different name end of the secondary winding of main transformer connects the first input end of first rectification filtering unit, and second input of first rectification filtering unit connects the end of the same name of this secondary winding by current-sharing electric capacity;
Perhaps, described the 3rd current supply circuit comprises: the different name end of the secondary winding of main transformer connects the first input end of first rectification filtering unit by current-sharing electric capacity, and second input of first rectification filtering unit connects the end of the same name of this secondary winding.
12. circuit according to claim 11 is characterized in that, two windings of described the 3rd current-sharing transformer are arranged at respectively between the first input end of the different name end of secondary winding in corresponding the 3rd current supply circuit and first rectification filtering unit;
Perhaps, two of described the 3rd current-sharing transformer windings are arranged at respectively between second input of the end of the same name of secondary winding in corresponding the 3rd current supply circuit and first rectification filtering unit.
13. according to each described circuit of claim 9 to 12, it is characterized in that, also comprise: second rectification filtering unit that constitutes by the 5th diode and the 3rd capacitances in series; Wherein,
A secondary winding of the corresponding main transformer of second rectification filtering unit constitutes second current supply circuit with this secondary winding; Between described second current supply circuit and adjacent one the 3rd current supply circuit current-sharing transformer is set, first winding of this current-sharing transformer is arranged in the 3rd current supply circuit, second winding is arranged in second current supply circuit, is used for carrying out the current-sharing of the 3rd current supply circuit and the second current supply circuit electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202833430U CN201766750U (en) | 2010-08-03 | 2010-08-03 | Multi-way direct current supply circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202833430U CN201766750U (en) | 2010-08-03 | 2010-08-03 | Multi-way direct current supply circuit |
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| Publication Number | Publication Date |
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| CN201766750U true CN201766750U (en) | 2011-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202833430U Expired - Lifetime CN201766750U (en) | 2010-08-03 | 2010-08-03 | Multi-way direct current supply circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102348309A (en) * | 2010-08-03 | 2012-02-08 | 英飞特电子（杭州）有限公司 | Multi-path direct current power supply circuit |
| CN111162660A (en) * | 2020-01-08 | 2020-05-15 | 毛昭祺 | Multi-channel resonance conversion circuit and multi-channel output control method based on multi-channel resonance conversion circuit |
-
2010
- 2010-08-03 CN CN2010202833430U patent/CN201766750U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102348309A (en) * | 2010-08-03 | 2012-02-08 | 英飞特电子（杭州）有限公司 | Multi-path direct current power supply circuit |
| CN111162660A (en) * | 2020-01-08 | 2020-05-15 | 毛昭祺 | Multi-channel resonance conversion circuit and multi-channel output control method based on multi-channel resonance conversion circuit |
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Address after: Hangzhou City, Zhejiang province 310053 Binjiang District Dongxin Road No. 66 East communication B block 309 Patentee after: LED One (Hangzhou) Co.,Ltd. Address before: Hangzhou City, Zhejiang province 310053 Binjiang District Dongxin Road No. 66 East communication B block 309 Patentee before: Inventronics (Hangzhou) Co., Ltd. |
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