CN101072010B - Micro-regulation circuit of transformer winding voltage - Google Patents
Micro-regulation circuit of transformer winding voltage Download PDFInfo
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- CN101072010B CN101072010B CN2006100785356A CN200610078535A CN101072010B CN 101072010 B CN101072010 B CN 101072010B CN 2006100785356 A CN2006100785356 A CN 2006100785356A CN 200610078535 A CN200610078535 A CN 200610078535A CN 101072010 B CN101072010 B CN 101072010B
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Abstract
The invention is related to the fine adjustment circuit (FAC) for voltage of transformer winding. FAC is in use for adjusting the output voltage of main transformer winding (MTW) in conversion device for electric power, and for improving granularity of number of turns in traditional transformer. FAC includes following parts: associated transformer (AT) possesses primary winding connected to MTW in series, and secondary coil; clamp voltage through diode is connected the secondary coil of AT; when current flows through MTW, the secondary coil of AT induces out correction voltage proportional tothe clamp voltage to correct the output voltage of main transformer. Intensity of the correction voltage can be adjusted through ration of number of turns between primary and secondary windings. Moreover, FAC also includes resistance connected to the clamp voltage in series. Intensity of the correction voltage also can be adjusted through numerical value of resistance.
Description
Technical field
The present invention is a kind of trimming circuit of Transformer Winding voltage, and especially a kind of being used in the suitching type power inverter is in order to the trimming circuit of the output voltage of the main transformer winding in the adjustment suitching type power inverter.
Background technology
Transformer has a primary coil and at least one secondary coil, is used for the conversion of electric power.Usually, the primary coil of transformer is connected with a primary circuit, and secondary coil then is connected with secondary circuit.The electric power of primary circuit is sent to the primary coil of transformer, and transformer is transformed into magnetic force with electric power and is sent to the primary side of transformer through the iron core of transformer, and on the secondary coil of transformer, is converted into electric power output.Electric power on the secondary coil, like curtage, relevant with the number of turn of coil.So the number of turn of adjustment transformer and secondary coil promptly can obtain desired output voltage or output current effectively on secondary coil.Therefore, the number of turn through adjustment transformer and a plurality of secondary coils promptly can obtain the output of a plurality of and different voltages.
Now, in the application of electronic circuit, often need to use the output of high electrical power and low-voltage.So the secondary coil of transformer can not have the too many number of turn, this can bring the problem of a number of turn granularity (turnsgranularity).The number of turn that the engineer of design transformer can adjust transformer usually changes different voltages with different output, the required voltage but this mode can't fully be coincide.For example; When circuit needs 8V and 5V respectively,, then be directed against the demand of another 8V of circuit if design transformer secondary output coil 2 circles can obtain 5V; Then can must be low 7.5V because of secondary coil 3 circles, secondary coil 4 circles obtain too high 10V and can't supply effectively.So, if will obtain the output of 8V, the engineer who then designs transformer need be around the secondary coil of 3.2 circles, and this kind mode can't be reached on traditional transformer, and needs special transformer.It is big, expensive that special transformer has a common volume, needs special electromagnetic assembly simultaneously, and shortcoming such as can't can buy immediately.
Please refer to Fig. 4, be United States Patent (USP) 6,348, the structural representation of tool non-integer circle winding (Factional-turn winding) transformer that is disclosed for No. 848.Another countermeasure to this problem; Accept higher slightly integer circle number of turns ratio; And the use resistance device; As linear voltage regulator or one time of voltage product absorb device (voltage-time eating means), like the saturable reactor, reduce the too high voltages that causes because of the higher number of turns, thereby reach the required winding voltage of circuit.But resistance device or saturable reactor all can generate heat at work, so this countermeasure can cause the excess power loss.The power supply unit circuit diagram that Fig. 5 is disclosed for No. 6735094 for United States Patent (USP), among the figure, power supply unit uses saturable reactor (Saturable Reactor) Lsat3, Lsat4 to weaken the output voltage of transformer 1,2 secondary coil N3, N4.
Fig. 6 A is depicted as the circuit diagram that uses rearmounted linear voltage regulator to reach the resistor effect.
Fig. 6 B reaches the circuit diagram of effect same for using rearmounted switching type voltage stabilizer.In Fig. 6 B, switching type voltage stabilizer can be revised output voltage, and improves the loss of Heat and Work rate.But, expensive, volume reach complicated circuitry greatly, make switching type voltage stabilizer extensively do not adopted.
Please refer to Fig. 7, is one to have the circuit diagram of the transducers of many outputs.This circuit file with transducers of exporting open at the EDN magazine in 2001-02-01 by Robert Bel (Robert Bell) more.In Fig. 7, Robert Bel (Robert Bell) utilizes a residual quantity transformer to solve the problem of the number of turn granularity (turns granularity) of traditional transformer.Residual quantity transformer T2 be an auxiliary transformer its have a primary coil 23T and a level coil 10T.The primary coil 23T coupled in parallel of residual quantity transformer T2 is in the secondary coil 1T of main transformer T1, and the secondary coil 10T coupled in series of residual quantity transformer T2 is in another secondary coil 1T of main transformer T1.So the secondary coil 10T of residual quantity transformer T2 is used for revising the output voltage of another output winding 1T of main transformer T1.
But, the residual quantity transformer has a problem, though the primary coil 23T of residual quantity transformer T2 does not deliver output current in fact, so can have the more number of turn.But its secondary coil 10T still is loaded with output current, so the too many number of turn can not be arranged, the range of choice that causes revising voltage is restricted, and makes the problem of number of turn granularity (turns granularity) of traditional transformer still can't solve fully.
The residual quantity transformer exists another problem, and the voltage drop that promptly the secondary coil 1T of main transformer T1 is produced because a direct current output current is flowed through causes one time of the voltage product (voltage-time product) between this coil end points not to be zero.Yet; Because the primary coil 23T coupled in parallel of residual quantity transformer T2 is in the secondary coil 1T of main transformer T1; The voltage of this non-zero-time product will make the magnetic core trend of residual quantity transformer saturated; For fear of saturated, then residual quantity transformer T2 need have enough big primary coil 23T resistance and magnetic core, so the volume of residual quantity transformer T2 can be too not little.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of trimming circuit of Transformer Winding voltage; Be used in the power inverter; The method of output voltage in order to an adjustment main transformer winding wherein; Can be used for improving the problem of the number of turn granularity (turns granularity) of traditional transformer, a simple and easy and high efficiency trimming circuit is provided simultaneously, in order to the output voltage of dynamic correction main transformer.
To achieve these goals; The invention provides a kind of trimming circuit of Transformer Winding voltage; Its characteristics are, be used for reducing one controlled winding induced voltage, include: an attached transformer; Have a primary coil and a level coil, this primary coil of this attached transformer is connected in series in this and is controlled winding; Reach a voltage clamping, be connected in this secondary coil of this attached transformer through a diode; Wherein, when an electric current flow through this and controlled winding, this secondary coil of this attached transformer can be responded to a voltage, and this diode couples this voltage to this voltage clamping.
The present invention also provides a kind of trimming circuit of Transformer Winding voltage, and its characteristics are, be used for reducing one controlled winding induced voltage, include:
One attached transformer has a primary coil and a level coil, and this primary coil of this attached transformer is connected in series in this and is controlled winding; Reach a voltage clamping, be connected in this secondary coil of this attached transformer through a resistor and a diode; Wherein, when an electric current flow through this and controlled winding, this secondary coil of this attached transformer can be responded to a voltage, and this diode couples this voltage, through this resistor to this voltage clamping.
The trimming circuit of above-mentioned Transformer Winding voltage, its characteristics are that this voltage clamping is an output filter capacitor, and this output filter capacitor can store through flowing through this and controlled winding at the electric current through over commutation, to set up a direct current voltage.
The trimming circuit of above-mentioned Transformer Winding voltage, its characteristics are that this resistor is a variable resistance; The resistance value of this resistor changes with the size of this direct voltage; When direct voltage uprised, the resistance value of this resistor also uprised, otherwise; During the direct voltage step-down, the resistance value of this resistor is step-down then.
The trimming circuit of above-mentioned Transformer Winding voltage; Its characteristics are; This resistor is a control circuit, and this control circuit is low or be higher than a target current potential according to the terminal voltage of this voltage clamping, and then control flows to the number of the electric current of this voltage clamping from this secondary coil of this attached transformer.
Effect of the present invention; Be to be used for to improve the problem of the number of turn granularity (turnsgranularity) of traditional transformer, a simple and easy and high efficiency trimming circuit be provided simultaneously, in order to the output voltage of dynamic correction main transformer; Can power saving; Also because the superfluous voltage of main transformer winding can convert suitable value to, and forward be sent to output circuit.
Describe the present invention below in conjunction with accompanying drawing and specific embodiment, but not as to qualification of the present invention.
Description of drawings
Figure 1A is a first embodiment of the present invention circuit diagram;
Figure 1B is a second embodiment of the present invention circuit diagram;
Fig. 1 C is a third embodiment of the present invention circuit diagram;
Fig. 1 D is a fourth embodiment of the present invention circuit diagram;
Fig. 2 A is a second embodiment of the present invention circuit diagram;
Fig. 2 B is a fifth embodiment of the present invention circuit diagram;
Fig. 2 C is a sixth embodiment of the present invention circuit diagram;
Fig. 2 D is a seventh embodiment of the present invention circuit diagram;
Fig. 3 A is an eighth embodiment of the present invention circuit diagram;
Fig. 3 B is a nineth embodiment of the present invention circuit diagram;
Fig. 3 C is a tenth embodiment of the present invention circuit diagram;
Fig. 3 D is a 11st embodiment of the present invention circuit diagram;
Fig. 4 is a United States Patent (USP) 6,348, the structural representation of the tool part winding transformer that is disclosed for No. 848;
The power supply unit circuit diagram that Fig. 5 is disclosed for No. 6735094 for United States Patent (USP); ,
Fig. 6 A reaches the circuit diagram of adjustment effect for using rearmounted linear voltage regulator;
Fig. 6 B reaches the circuit diagram of adjustment effect for using rearmounted linear voltage regulator; And
Fig. 7 is the circuit diagram that a use residual quantity transformer reaches the adjustment effect.
Wherein, Reference numeral:
101 main transformer 101a primary coils
Another secondary coil of 101b secondary coil 101c
102 attached transformer 102a primary coils
102b secondary coil 103 diodes
104 output filter capacitors, 105 clamping diodes
106 fixed voltages, 107 zener diodes
201 rectifiers, 202 second output filter capacitors
301 resistors, 302 linear voltage-stabilizing circuits
303 filter capacitors
Embodiment
Please refer to Figure 1A, be first embodiment of the present invention circuit diagram, this circuit is the variant of a prior art in fact.Among Figure 1A, main transformer 101 has a primary coil 101a, level coil 101b and another secondary coil 101c.At this, secondary coil 101b is the winding (being controlled winding) of a needs regulation, has the problem of number of turn granularity (turns granularity).One attached transformer 102 has a primary coil 102a and a level coil 102b, and what this primary coil 102a of this attached transformer 102 was connected in series in this main transformer 101 is controlled winding 101b.The primary coil 102a and the secondary coil 102b of attached transformer 102 are connected in series, with the secondary coil cross-over connection that forms a residual quantity transformer in being controlled winding 101b.One be equivalent to the part of winding 101b end-point voltage correction voltage will sense winding 102a two ends.One diode 103 is connected in through primary coil 102a and is controlled winding 101b, controlled the correction voltage adjustment of output voltage through primary coil 102a two ends on the winding 101b after, be sent to an output filter capacitor 104 by diode 103 again.At this moment, controlled winding 101b and upward offseted granularity problem thereby solution by the correction voltage at winding 102a two ends because of the caused superfluous voltage of granularity problem.
Please refer to Figure 1B, be second embodiment of the present invention circuit diagram.Among Figure 1B; Identical with shown in Figure 1A of main transformer 101 and attached transformer 102; But; The primary coil 102a of attached transformer 102 is not to be connected with the mode of being connected in series with secondary coil 102b, but changes the secondary coil 102b of attached transformer 102 into the clamping diode 105 that is connected in series, and secondary coil 102b passes through clamping diode 105 cross-over connections in output filter capacitor 104.The output voltage of being controlled on the winding 101b is sent to output filter capacitor 104 through primary coil 102a, diode 103.When output current flows through the primary coil 102a of attached transformer 102, then can respond to produce a voltage and export a secondary current at the secondary coil 102b of attached transformer 102.This secondary current flows to output filter capacitor 104 through clamping diode 105.Diode 103 is connected with the cathode terminal of clamping diode 105, all is along partially, so the current potential of anode tap is also close.
Therefore just just like connecting together this anode tap, just the same with Figure 1A, can recently adjust through the coil turn that changes attached transformer 102, just like the residual quantity transformer by the correction voltage at primary coil 102a two ends in operation for present embodiment.But manservant of an official's quantitative change depressor is different, and clamping diode 105 also gets into and ends when the output current of the diode 103 of flowing through stops, and this moment, attached transformer 102 promptly jumped out of load circuit.After attached transformer 102 jumped out of load circuit, the voltage on the coil can freedom is counter speed (Flyback), the magnetic flux in the iron core is removal naturally also.
Please refer to Fig. 1 C, be third embodiment of the present invention circuit diagram.Close shown in Fig. 1 C and Figure 1B, not existing together only is connected in a fixed voltage 106 at the secondary coil 102b of attached transformer 102, but not output filter capacitor 104.When output current flows through the primary coil 102a of attached transformer 102, then can respond to produce a voltage at the secondary coil 102b of attached transformer 102.This voltage passes through this clamping diode 105, and receives the restriction of this fixed voltage 106.The magnitude of voltage of this voltage is the pressure drop of clamping diode 105 and the totalling of this fixed voltage 106.This voltage can reflex to the primary coil 102a of attached transformer 102 according to the coil ratio of attached transformer 102.Can learn through this kind annexation; The voltage that changes the primary coil 102a of attached transformer 102 just can be adjusted the output voltage of being controlled on the winding 101b, and the voltage of the primary coil 102a of attached transformer 102 is decided by the pressure drop of clamping diode 105, the magnitude of voltage of this fixed voltage 106 and the coil ratio of attached transformer 102.So, the present invention can recently revise the output voltage of being controlled on the winding 101b through the coil turn that changes attached transformer 102, to reach required voltage.Or the magnitude of voltage that the present invention also can dynamically change fixed voltage 106 reaches above-mentioned identical effect.
Please refer to Fig. 1 D, be fourth embodiment of the present invention circuit diagram.Close shown in Fig. 1 D and Fig. 1 C, not existing together only is to use a zener diode 107 to replace this fixed voltage 106, and simultaneously, its mode of operation and principle are all said identical with Fig. 1 C.
Please refer to Fig. 2 A, identical with Figure 1B, the voltage on the output filter capacitor 104 is mainly supplied by the output voltage of being controlled on the winding 101b, and output filter capacitor 104 can be used as the usefulness of a voltage clamping.The secondary coil 102b of attached transformer 102 can be serially connected with clamping diode 105, and with clamping diode 105 cross-over connections simultaneously in output filter capacitor 104.The secondary coil 102b of attached transformer 102 promptly obtains the voltage on the output filter capacitor 104 through clamping diode 105; And with the primary coil 102a of this voltage reflection that gets access to attached transformer 102, the voltage on the primary coil 102a of attached transformer 102 promptly can be used for cutting down the output voltage of being controlled the last surplus of winding 101b.
Please refer to Fig. 2 B, be fifth embodiment of the present invention circuit diagram.In Fig. 2 B, the end of the secondary coil 102b of attached transformer 102 is serially connected with clamping diode 105, is connected to output filter capacitor 104 then, and the other end then is connected to another secondary coil 101c of main transformer 101.The secondary coil 102b of attached transformer 102 thereby be clamped to a voltage, its value deducts the magnitude of voltage (wherein the voltage drop of clamping diode 105 is lower, generally can ignore) on another secondary coil 101c for the magnitude of voltage on the output filter capacitor 104.Present embodiment is except the problem of the number of turn granularity (turnsgranularity) that can solve main transformer 101; In the time of can also needing extra load respectively to export the load capacity between the group at another secondary coil 101c, shift required load current and cause the usefulness of improving the mutual regulation of voltage (cross-regulation) to reach with balance when main transformer 101.
Please refer to Fig. 2 C, be sixth embodiment of the present invention circuit diagram.In Fig. 2 C, a rectifier 201 becomes direct voltage with the ac voltage rectifier on another secondary coil 101c of main transformer 101, and direct voltage outputs to a secondary circuit.This secondary circuit is connected with the usefulness of one second output filter capacitor, 202, the second output filter capacitors 202 as a voltage clamping.The secondary coil 102b of attached transformer 102 can be serially connected with clamping diode 105, and with clamping diode 105 cross-over connections simultaneously in second output filter capacitor 202.Voltage on the secondary coil 102b of attached transformer 102 through clamping diode 105 to obtain the voltage on second output filter capacitor 202.So; Present embodiment is except the problem of the number of turn granularity (turns granularity) that can solve main transformer 101; Can also when needing extra supply of electric power respectively to export the load capacity between the group, shift required load current to reach the usefulness of improving the mutual regulation of voltage (cross-regulation) with balance when secondary circuit.
Please refer to Fig. 2 D, be seventh embodiment of the present invention circuit diagram.In Fig. 2 D, the secondary coil 102b of attached transformer 102 can be serially connected with clamping diode 105, and is controlled the winding 101b and second output filter capacitor 202 with clamping diode 105 cross-over connections simultaneously in main transformer 101.The secondary coil 102b of attached transformer 102 thereby be clamped to a voltage; Its value is the magnitude of voltage (wherein the voltage drop of clamping diode 105 is lower, generally can ignore) on the winding 101b of being controlled that the magnitude of voltage on second output filter capacitor 202 deducts main transformer 101.So; Present embodiment is except the problem of the number of turn granularity (turns granularity) that can solve main transformer 101; Can also need extra supply of electric power at the winding 101b that controlled when main transformer 101; When respectively exporting the load capacity between the group, shift required load current to reach the usefulness of improving the mutual regulation of voltage (cross-regulation) with balance.
Please refer to Fig. 3 A, be eighth embodiment of the present invention circuit diagram.In Fig. 3 A, a resistor 301 is serially connected with the secondary coil 102b and the clamping diode 105 of attached transformer 102, and with secondary coil 102b, clamping diode 105 cross-over connections simultaneously in output filter capacitor 104.When current flows through resistor 301, resistor 301 unfolded potential differences.Potential difference on the resistor 301 improves the voltage on the secondary coil 102b, and reflexes on the primary coil 102a.And the voltage of primary coil 102a can offset the induced voltage of being controlled winding 101b of main transformer 101, makes that the voltage on the output filter capacitor 104 reduces.Therefore, the present invention be able to change resistor 301 resistance value with the adjustment output voltage.
This resistor 301 can be a variable resistance, and the resistance value of this resistor 301 changes with the size of the direct voltage on the output filter capacitor 104, when direct voltage is tended towards superiority; The resistance value of this resistor also uprises; Otherwise when direct voltage became to hanging down, the resistance value of this resistor is step-down then.This resistor can be a control circuit, is included in the control system, changes its resistance characteristic according to the size of this output voltage, thereby controls the voltage clamp of this secondary coil of this attached transformer, is used for adjusting automatically the output of voltage.
Please refer to Fig. 3 B, be nineth embodiment of the present invention circuit diagram.The 9th embodiment uses a linear voltage-stabilizing circuit 302 to replace the resistor 301 (shown in Fig. 3 A) among the 8th embodiment.One linear voltage-stabilizing circuit 302 has an output, an input and an earth terminal.The input of linear voltage-stabilizing circuit 302 is serially connected with the secondary coil 102b and the clamping diode 105 of attached transformer 102.303 cross-over connections of one filter capacitor are in input, and filter capacitor 303 is non-essential (being represented by dotted lines), only when cooperating general general linear voltage stabilization IC such as 78XX series, just need to use.The output of linear voltage-stabilizing circuit 302 is connected in output filter capacitor 104, and the earth terminal of linear voltage-stabilizing circuit 302 is connected in a reference potential.So linear voltage-stabilizing circuit 302 can detect output voltage, when output voltage is lower than a target voltage, then linear voltage-stabilizing circuit 302 can conductings from the electric current of secondary coil 102b output to output filter capacitor 104.This moment, operation principle and the resistor 301 of linear voltage-stabilizing circuit 302 were identical when low resistance.Simultaneously, the primary coil 102a of attached transformer 102 and the voltage on the secondary coil 102b also can descend.So, the induced voltage of being controlled winding 101b of main transformer 101 can receive less regulation and voltage on the output filter capacitor 104 can increase.
Otherwise linear voltage-stabilizing circuit 302 detected output voltages are higher than this target voltage, and then linear voltage-stabilizing circuit 302 can be by the electric current of exporting from secondary coil 102b to output filter capacitor 104.This moment, operation principle and the resistor 301 of linear voltage-stabilizing circuit 302 were identical when high value.Simultaneously, the primary coil 102a of attached transformer 102 and the voltage on the secondary coil 102b will rise.So, the induced voltage of being controlled winding 101b of main transformer 101 can receive strong regulation and voltage on the output filter capacitor 104 can reduce.In sum, the size of setting the target voltage in the linear voltage-stabilizing circuit 302 promptly can be adjusted the voltage on the output filter capacitor 104.
In the circuit structure that present embodiment uses, linear voltage-stabilizing circuit 302 just I/O potential difference of being adjusted and the some that reaches output current.So the power loss of linear voltage-stabilizing circuit 302 can be lower than the conventional linear pressurizer shown in Fig. 6 A.
Please again with reference to figure 3B, each following expression formula can represent that present embodiment uses the advantage of linear voltage-stabilizing circuit 302:
V_102a＝V1-V2……(1)
In formula (1), V1 is the induced voltage on the winding 101b of being controlled of main transformer 101; V_102a is the correction voltage on the primary coil 102a of attached transformer 102; V2 is for from being controlled winding 101b, required voltage after this corrections voltage is renovated.
V_102b＝K*V_102a＝K*(V1-V2)……(2)
In formula (2), K is the turn ratio of attached transformer 102; V_102b is the voltage on the secondary coil 102b of attached transformer 102.
I_102b＝I_102a/K……(3)
In formula (3), I_102a and I_102b are respectively the primary coil 102a that flows through attached transformer 102 and the electric current of secondary coil 102b.
Power P _ 302 that linear voltage-stabilizing circuit 302 work are consumed can be obtained by following formula (4):
P_302＝V_302*I_302……(4)
In formula (4), V_302 is the input of linear voltage-stabilizing circuit 302 and the potential difference between output; I_302 is for flowing to the electric current of output from linearity adjustment circuit 302 inputs, its value equals to flow through electric current I _ 102b of the secondary coil 102b of attached transformer 102.
The pressure drop of ignoring clamping diode 105 can be rewritten as formula (5) with formula (4):
P_302＝(V_102b-V2)*I_102b……(5)
Cooperate formula (1), (2), (3), can formula (5) be rewritten as formula (6):
P_302＝(K*(V1-V2)-V2)*(I_102a/K)
＝(V1-V2)*I_102a-V2*I_102a/K……(6)
Preceding paragraph in formula (6), (V1-V2) * I_102a is the power loss of a conventional linear voltage stabilizing circuit, and its consequent be that a negative value shows that present embodiment is for the economization of traditional voltage stabilizing circuit in power consumption.
If the turn ratio K of attached transformer 102 is set in a critical value, be 1/ (V1/V2-1), then the power loss P_302 of linear voltage-stabilizing circuit 302 is zero.This has no the extreme case under the internal pressure drops for linear voltage-stabilizing circuit 302, has only this moment this voltage stabilizing circuit not have internal pressure drops again and can supply to regulate, thereby does not adjust the dynamic space of output voltage.So the setting of this K value should fully be higher than this critical value.Yet the power loss of voltage stabilizing circuit 302 is low than traditional linear voltage regulator all the time.
Please refer to shown in Fig. 3 C and Fig. 3 D, be respectively tenth embodiment of the present invention circuit diagram and the 11 embodiment circuit diagram.Secondary coil 102b one end of attached transformer 102 is serially connected with a clamping diode 105 and a resistor 301 among the tenth embodiment, is connected to output filter capacitor 104 then, and the other end then is connected to another secondary coil 101c of main transformer 101.The 11 embodiment then replaces resistor 301 by linear voltage-stabilizing circuit 302.In the tenth embodiment and the 11 embodiment; When another secondary coil 101c of main transformer 101 needed extra load capacity, these embodiment also can export group from other and shift required load current to make to improve the usefulness of the mutual regulation of voltage (cross-regulation).
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of claim of the present invention.
Claims (5)
1. the trimming circuit of a Transformer Winding voltage is characterized in that, be used for reducing one controlled winding voltage, to improve the mutual regulation of voltage, include:
One main transformer has an elementary winding, and level winding and is controlled winding;
One attached transformer has a primary coil and a level coil, this primary coil be connected in series in this main transformer this controlled winding;
One output filter capacitor; This of next extremely this main transformer of this output filter capacitor storage controlled the electric current of winding behind over commutation, to set up a direct current voltage; And
One diode is connected in series in this secondary coil of this attached transformer, constitutes a series and closes; This tandem compound cross-over connection is used to shift electric current from this secondary winding to this direct voltage between this secondary winding and this direct voltage of this main transformer;
Wherein, when this that flows through this main transformer when an electric current controlled winding, this secondary coil of this attached transformer can produce an induced voltage, is coupled to this tandem compound two ends.
2. the trimming circuit of a Transformer Winding voltage is characterized in that, be used for reducing one controlled winding voltage, to improve the mutual regulation of voltage, include:
One main transformer has an elementary winding, and level winding and is controlled winding;
One attached transformer has a primary coil and a level coil, this primary coil be connected in series in this main transformer this controlled winding;
One output filter capacitor; This output filter capacitor stores the electric current of this secondary winding behind over commutation to this main transformer, to set up a direct current voltage; And
One diode is connected in series in this secondary coil of this attached transformer, constitutes a series and closes, and this tandem compound cross-over connection is controlled between winding and this direct voltage in this of this main transformer, is used to shift from this electric current of being controlled winding to this direct voltage;
Wherein, when this that flows through this main transformer when an electric current controlled winding, this secondary coil of this attached transformer can produce an induced voltage, is coupled to this tandem compound two ends.
3. the trimming circuit of Transformer Winding voltage according to claim 1 and 2 is characterized in that, this tandem compound also includes a resistor, is series at this diode.
4. the trimming circuit of Transformer Winding voltage according to claim 3 is characterized in that, this resistor is a variable resistance; The resistance value of this resistor changes with the size of this direct voltage; When direct voltage uprised, the resistance value of this resistor also uprised, otherwise; During the direct voltage step-down, the resistance value of this resistor is step-down then.
5. the trimming circuit of Transformer Winding voltage according to claim 3 is characterized in that, this resistor is a control circuit, and this control circuit is according to the low of this output voltage or be higher than a target current potential, thereby control flows is through the number of the electric current of this control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100785356A CN101072010B (en) | 2006-05-08 | 2006-05-08 | Micro-regulation circuit of transformer winding voltage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006100785356A CN101072010B (en) | 2006-05-08 | 2006-05-08 | Micro-regulation circuit of transformer winding voltage |
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| CN101072010A CN101072010A (en) | 2007-11-14 |
| CN101072010B true CN101072010B (en) | 2012-06-20 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5969439A (en) * | 1998-04-09 | 1999-10-19 | Megapulse, Incorporated | Pulse generator apparatus for RF pulse generation in tuned loads including series regulation and capacitor clamping method therefor |
| CN1417932A (en) * | 2002-12-09 | 2003-05-14 | 艾默生网络能源有限公司 | DC converter circuit with phase shift controlling bridye circuit |
| CN1592066A (en) * | 2003-08-28 | 2005-03-09 | 台达电子工业股份有限公司 | Nondestructive clamp circuit |
-
2006
- 2006-05-08 CN CN2006100785356A patent/CN101072010B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5969439A (en) * | 1998-04-09 | 1999-10-19 | Megapulse, Incorporated | Pulse generator apparatus for RF pulse generation in tuned loads including series regulation and capacitor clamping method therefor |
| CN1417932A (en) * | 2002-12-09 | 2003-05-14 | 艾默生网络能源有限公司 | DC converter circuit with phase shift controlling bridye circuit |
| CN1592066A (en) * | 2003-08-28 | 2005-03-09 | 台达电子工业股份有限公司 | Nondestructive clamp circuit |
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| CN101072010A (en) | 2007-11-14 |
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