CN102739046A - Auxiliary power supply circuit without electrolytic capacitor - Google Patents
Auxiliary power supply circuit without electrolytic capacitor Download PDFInfo
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- CN102739046A CN102739046A CN2012102394117A CN201210239411A CN102739046A CN 102739046 A CN102739046 A CN 102739046A CN 2012102394117 A CN2012102394117 A CN 2012102394117A CN 201210239411 A CN201210239411 A CN 201210239411A CN 102739046 A CN102739046 A CN 102739046A
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Abstract
The invention relates to an auxiliary power supply circuit without an electrolytic capacitor, which can be applied to a power supply so as to supply direct current to a main control circuit of a power supply. The auxiliary power supply circuit comprises an input end, a first branch circuit, a second branch circuit, a voltage stabilizing circuit and an output end, wherein the input end is connected with a rectification circuit of the power supply, the first branch circuit and the second branch circuit are respectively connected with the input end and the voltage stabilizing circuit in parallel, and the output end is respectively connected with the voltage stabilizing circuit and the main control circuit of the power supply. When the power supply starts, the first branch circuit supplies the direct current to the main control circuit through the voltage stabilizing circuit, thus after the circuit of the power supply starts working, the second branch circuit supplies the direct current to the series voltage stabilizing circuit when half-wave direct current supplied to the power supply is in a peak state, and the first branch circuit supplies the direct current to the series voltage stabilizing circuit when the half-wave direct current supplied to the power supply is in a valley state.
Description
Technical field
The present invention relates to Switching Power Supply, the particularly auxiliary power circuit in the Switching Power Supply, this auxiliary power circuit does not adopt electrochemical capacitor, and can be applied among the no electrolytic capacitor Switching Power Supply, thereby prolongs the useful life of this no electrolytic capacitor power supply.
Background technology
Because LED (Light emitting diode) has efficiently, long service life, the characteristics that environmental protection and volume are little make the lighting technology of LED obtain very big development, thereby have brought new opportunity for traditional illumination market.LED can be applied in street lighting, but finds that but the useful life of this LED street lamp is not long, and often breaks down.Its reason is that the power supply to this LED street lamp power supply, road lamp power supply breaks down.Say so more specifically, break down for the electrochemical capacitor in the power supply of this LED street lamp power supply, road lamp power supply.Adopt the theoretical life-span of the electrochemical capacitor of traditional approach design to have only 10000 hours (at the hot operation state of LED), this designed life (50000 hours) well below LED.Therefore, electrochemical capacitor is to improve breach of LED long-term reliability.Therefore, the no electrolytic capacitor power supply is to solve a LED research direction reliably and with long-term.
As shown in Figure 1, shown in Figure 1 is traditional Switching Power Supply structure.Traditional Switching Power Supply generally comprises a rectification circuit, an auxiliary power circuit, a power stage circuit, a subordinate or output circuit, a main control circuit and a testing circuit.The problem of not using no electrolytic capacitor at rectification circuit, subordinate or output circuit, power stage circuit of researching and solving is concentrated in no electrolytic capacitor power supply research now.But ignored the problem of using electrochemical capacitor in the auxiliary power circuit that solves; Therefore; Though present no electrolytic capacitor power supply is greatly improved in reliability; But also do not include the no electrolytic capacitor of real meaning, because of the guidance power supply in this no electrolytic capacitor power supply also has electrochemical capacitor.Having electrochemical capacitor in the auxiliary power circuit, is a destabilizing factor of the long-term reliability of this no electrolytic capacitor power supply, thereby has restricted the raising of this no electrolytic capacitor power supply reliability.In general, this auxiliary power circuit is mainly the main control circuit power supply in the Switching Power Supply.Alternating current gets into this auxiliary power circuit through after this rectification circuit rectification of Switching Power Supply, is converted into this master control module work that direct current supplies Switching Power Supply through auxiliary power circuit.
In the auxiliary power circuit of conventional power source, the effect of electrochemical capacitor mainly is when the alternating current that is supplied to this power supply is zero, by the output of this electrochemical capacitor supply direct current to this auxiliary power circuit, with stablizing of the magnitude of voltage of keeping this output.Because the capacity of the Capacity Ratio electrochemical capacitor of non-electrolytic capacitor is little, and expensive, therefore directly use with this auxiliary power circuit in the alternative electrochemical capacitor of non-electrolytic capacitor that equates of electrochemical capacitor capacity, be not an adequate solution way.In auxiliary power circuit, use non-electrolytic capacitor, how how demand side starts this auxiliary power circuit and during the alternating current zero passage, two problems of power supply with safeguarding stability.
Summary of the invention
A goal of the invention of the present invention is to provide a no electrolytic capacitor auxiliary power circuit, to prolong the useful life of this auxiliary power circuit.
Another goal of the invention of the present invention is to provide a no electrolytic capacitor auxiliary power circuit, and it can be applied in the no electrolytic capacitor power supply, thereby improves the reliability of this no electrolytic capacitor power supply and prolong useful life of this no electrolytic capacitor power supply.
Another goal of the invention of the present invention is to provide a no electrolytic capacitor auxiliary power circuit, and this first subcircuits can be kept this no electrolytic capacitor auxiliary power circuit steady operation when the half-wave DC electricity that inputs to this no electrolytic capacitor auxiliary power circuit is in the paddy state.
Another goal of the invention of the present invention is to provide a no electrolytic capacitor auxiliary power circuit, and this second subcircuits can be kept this no electrolytic capacitor auxiliary power circuit steady operation when the half-wave DC electricity that inputs to this no electrolytic capacitor auxiliary power circuit is in the peak state.
Another goal of the invention of the present invention is to provide a no electrolytic capacitor auxiliary power circuit, and this first subcircuits can start this no electrolytic capacitor auxiliary power circuit.
Another goal of the invention of the present invention is to provide the method for supplying power to of a no electrolytic capacitor auxiliary power circuit; Wherein, When at power initiation and when the half-wave DC electricity that inputs to this no electrolytic capacitor auxiliary power circuit is in the state of paddy;,,, the half-wave DC electricity that inputs to this no electrolytic capacitor auxiliary power circuit supplies power to this voltage stabilizing circuit when being in the state at peak to this voltage stabilizing circuit power supply by this first subcircuits by this second subcircuits.
Another goal of the invention of the present invention is to provide a no electrolytic capacitor auxiliary power circuit, and this no electrolytic capacitor auxiliary power circuit is in-fighting power still less, thereby makes this no electrolytic capacitor auxiliary power circuit that higher efficient arranged.
Another goal of the invention of the present invention is to provide a no electrolytic capacitor auxiliary power circuit; This no electrolytic capacitor accessory power supply has the duplex feeding circuit; One first subcircuits and one second subcircuits; This first subcircuits is supplied power during at the paddy state with the half-wave DC electricity that is supplied to this auxiliary power circuit when this no electrolytic capacitor auxiliary power circuit starts; The half-wave DC electricity that this second subcircuits is supplied to this auxiliary power circuit is supplied power during state at the peak, thus make this no electrolytic capacitor auxiliary power circuit sustainedly and stably supplying energy to satisfy the needs of this governor circuit operate as normal.
Another goal of the invention of the present invention is to provide a no electrolytic capacitor auxiliary power circuit, to realize real no electrolytic capacitor power supply.
In order to realize the foregoing invention purpose, the invention discloses an auxiliary power circuit, supply is used for a power supply, and this auxiliary power circuit is connected with a main control circuit with a rectification circuit of this power supply respectively and is connected, and it is characterized in that this is failed and helps power circuit to comprise:
One input, this input is connected with this rectification circuit of this power supply, being supplied to this auxiliary power circuit through the half-wave DC electricity of this rectification circuit rectification;
One first subcircuits;
One second subcircuits, this first subcircuits is connected this input respectively with this second subcircuits;
One voltage stabilizing circuit, this voltage stabilizing circuit connect this main control circuit of this first subcircuits, this second subcircuits and this power supply respectively; With
One output, this output are connected with the main control circuit of this voltage stabilizing circuit and this power supply respectively, with this main control circuit of supply direct current to this power supply;
Wherein, when this power initiation, supply direct current to this voltage stabilizing circuit by this first subcircuits; Thereby make this auxiliary power circuit start working, in working order down, when the half-wave DC electricity that is supplied to this auxiliary power circuit at the peak during state; Supply direct current to this voltage stabilizing circuit by this second subcircuits; Again by this voltage stabilizing circuit supply direct current to this output, when the half-wave DC electricity that is supplied to this auxiliary power circuit during at the paddy state, by this first subcircuits supply direct current to this voltage stabilizing circuit; Direct current after stablizing through this voltage stabilizing circuit is again supplied this main control circuit of direct current to this power supply at last to this output by this output.
The present invention also discloses the method for supplying power to of an auxiliary power circuit, and it may further comprise the steps:
Step 1: the state that detects this auxiliary power circuit; If be in this power initiation state; Then execution in step 2, if the half-wave DC electricity that is supplied to this auxiliary power circuit at the peak state, then execution in step 3; If the half-wave DC electricity that is supplied to this auxiliary power circuit is at the paddy state, then execution in step 2.
Step 2: one first subcircuits by this auxiliary power circuit is supplied direct current through this voltage stabilizing circuit to this output.
Step 3: one second subcircuits by this auxiliary power circuit is supplied direct current through this voltage stabilizing circuit to this output.
Description of drawings
Fig. 1 is the structure chart in the conventional switch power supply.
Fig. 2 is the block diagram of an auxiliary power circuit of one embodiment of the present invention, shows the structure of this auxiliary power circuit.
Fig. 3 is the circuit diagram of one embodiment of the present invention.
Fig. 4 is the circuit diagram of an alternative of first subcircuits of the above-mentioned preferred embodiment of the present invention.
Embodiment
According to claim of the present invention and the disclosed content of specification, technical scheme of the present invention literary composition specific as follows is said.
As shown in Figure 2; Auxiliary power circuit according to of the present invention one preferential embodiment; Wherein this auxiliary power circuit comprises one first subcircuits 10; One second a rood circuit 20 and a voltage stabilizing circuit 30, this first subcircuits 10 and this second subcircuits 20 respectively with an input V of this auxiliary power circuit
InConnect, this first subcircuits 10 is connected with this voltage stabilizing circuit 30 respectively with this second subcircuits 20, this voltage stabilizing circuit 30 and an output V
CcConnect.This auxiliary power circuit can be applicable to a power supply, is other circuit supply in this power supply, is preferably the main control circuit supply direct current of this power supply.Preferably, this power supply is a no electrolytic capacitor power supply.This input V
InA rectification circuit that connects this power supply will be being supplied to this auxiliary power circuit through the half-wave DC electricity of this rectification circuit rectification.This output V
CcThis main control circuit that connects this voltage stabilizing circuit 30 and this power supply respectively is with this main control circuit of supply direct current to this power supply.This auxiliary power circuit further comprises one second output V
Out, this second output V
OutBe connected with a main power stage circuit of this power supply and/or other circuit of this power supply, will be supplied to this main power stage circuit by the half-wave DC electricity of this rectification circuit rectification.
When this power initiation, to these voltage stabilizing circuit 30 supply direct currents, pass through this output V by this voltage stabilizing circuit 30 again by this first subcircuits 10
CcTo this main control circuit supply direct current, when this voltage stabilizing circuit 30 during to this main control circuit supply direct current, power initiation.When this power supply descends in working order; When the half-wave DC electricity of this auxiliary power circuit of input is in the peak state; Should defeated help this second subcircuits 20 of power supply these voltage stabilizing circuit 30 supply direct currents, to keep these voltage stabilizing circuit 30 supply direct currents to this main control circuit to this auxiliary power circuit.
When the half-wave DC electricity that inputs to this auxiliary power circuit during at the paddy state, by this first subcircuits 10 also to these voltage stabilizing circuit 30 supply direct currents, thereby make this voltage stabilizing circuit 30 through this output V
CcCan be stably to this main control circuit supply direct current.What deserves to be mentioned is that said peak state is meant the state of half-wave DC electricity in the first half.The paddy state is meant the state of half-wave DC electricity in the latter half.
As shown in Figure 3, this first subcircuits 10 is connected in a control node 60 with the input of this voltage stabilizing circuit 30.The change in voltage of this control node 60 can influence the change in voltage of this voltage stabilizing circuit 30.That is to say that when voltage of this control node 60 raises, the voltage of this voltage stabilizing circuit 30 also increases, when the magnitude of voltage of this control node 60 descends thereupon.What deserves to be mentioned is that this first subcircuits 10 has a switch threshold values, when magnitude of voltage of this control node 60 less than this switch threshold values, this first subcircuits 10 is to this voltage stabilizing circuit 30 supply direct currents.When the magnitude of voltage of this control node 60 is equal to or greater than this switch threshold values, this first subcircuits 10 stops to 30 power supplies of this voltage stabilizing circuit.That is to say, when the magnitude of voltage of this input of this voltage stabilizing circuit 30 less than this switch threshold values, this first subcircuits 10 is to these voltage stabilizing circuit 30 supply direct currents.When the magnitude of voltage of this input of this voltage stabilizing circuit 30 is equal to or greater than this switch threshold values, this first subcircuits 10 stops to 30 power supplies of this voltage stabilizing circuit.
When power initiation, the magnitude of voltage of this control node 60 is less than the switch threshold values of this first subcircuits 10, and this first subcircuits 10 begins these voltage stabilizing circuit 30 power supplies to this auxiliary power circuit.The magnitude of voltage of this control node 60 increases gradually.After this power initiation, be in the peak state if import the half-wave DC electricity of this auxiliary power circuit this moment, the magnitude of voltage of this control node 60 continues to increase.When the magnitude of voltage of this control node 60 was not equal to or greater than the shape threshold values of this first subcircuits, this first subcircuits 10 was supplied direct currents to this voltage stabilizing circuit 30 of this auxiliary power circuit simultaneously with this second subcircuits 20.When the magnitude of voltage of this control node 60 was equal to or greater than this switch threshold values, this first subcircuits 10 stopped these stabilizing circuit 30 power supplies to this auxiliary power circuit.In this case, 30 of this voltage stabilizing circuits are supplied power by this second subcircuits 20 fully.When the half-wave DC electricity of this accessory power supply of input during at the paddy state, this second subcircuits 20 stops the voltage decline to this voltage stabilizing circuit 30 these control nodes 60 of power supply.When the magnitude of voltage of this control node 60 was reduced to less than this switch threshold values of this first subcircuits 10, this first subcircuits 10 was to 30 power supplies of this voltage stabilizing circuit, but so that these voltage stabilizing circuit 30 regular supply direct currents to this main control circuit.The magnitude of voltage of this control node 60 begins to increase, and when this switch threshold values of these first subcircuits such as magnitude of voltage of this control node 60, this first subcircuits 10 stops to 30 power supplies of this voltage stabilizing circuit.
As shown in Figure 3, this auxiliary power circuit further comprises a capacitor C
4, this capacitor C
4With this first subcircuits 10, this second subcircuits 20 is connected with this voltage stabilizing circuit 30 respectively.When this power initiation, to these voltage stabilizing circuit 30 supply direct currents, supply direct current by this voltage stabilizing circuit 30 to this main control circuit again by this first subcircuits 10.Simultaneously, this first subcircuits 10 is to this capacitor C
4Charging.When this voltage stabilizing circuit 30 during to this main control circuit supply direct current, power initiation.When this power supply descends in working order; When the half-wave DC electricity of this auxiliary power circuit of input is in the peak state; Should defeated help this second subcircuits 20 of power supply these voltage stabilizing circuit 30 supply direct currents, to keep these voltage stabilizing circuit 30 supply direct currents to this main control circuit to this auxiliary power circuit.This moment this capacitor C
4Only a spot of filtering is provided, disturbs to reduce to this second subcircuits 20.When the half-wave DC electricity that inputs to this auxiliary power circuit during at the paddy state, by this first subcircuits 10 also to these voltage stabilizing circuit 30 supply direct currents, thereby make that this voltage stabilizing circuit 30 can be stably to this main control circuit supply direct current.This moment this capacitor C
4Also to these voltage stabilizing circuit 30 power supplies.Since the voltage stabilizing circuit 30 of this auxiliary power circuit mainly by this first with these second subcircuits, 10,20 supply direct currents, and this electric capacity only provides a spot of filtering to second subcircuits 20, so this capacitor C
4Can adopt the less non-electrolytic capacitor of capacity.Preferably, the capacity of the non-electrolytic capacitor that adopts of this commutation capacitor can be at≤0.47uF.
When power initiation, the magnitude of voltage of this control node 60 is less than the switch threshold values of this first subcircuits 10, and this first subcircuits 10 begins these voltage stabilizing circuit 30 power supplies to this auxiliary power circuit, and this first subcircuits 10 is also to this capacitor C simultaneously
4Charging.The magnitude of voltage of this control node 60 increases gradually.After this power initiation, be in the peak state if import the half-wave DC electricity of this auxiliary power circuit this moment, the magnitude of voltage of this control node 60 continues to increase.When the magnitude of voltage of this control node 60 was not equal to or greater than the shape threshold values of this first subcircuits, this first subcircuits 10 was supplied direct currents to this voltage stabilizing circuit 30 of this auxiliary power circuit simultaneously with this second subcircuits 20.When the magnitude of voltage of this control node 60 was equal to or greater than this switch threshold values, this first subcircuits 10 stopped these stabilizing circuit 30 power supplies to this auxiliary power circuit.In this case, 30 of this voltage stabilizing circuits are supplied power by this second subcircuits 20 fully.This moment this capacitor C
4Only filtering can be provided, disturb to reduce to this second subcircuits 20.When the half-wave DC electricity of this accessory power supply of input during at the paddy state, this second subcircuits 20 stops the voltage decline to this voltage stabilizing circuit 30 these control nodes 60 of power supply.At this moment, this capacitor C
4To these voltage stabilizing circuit 30 power supplies, because this capacitor C
4Capacity little, its electric weight that is supplemented to this voltage stabilizing circuit 30 can not satisfy the demand of this voltage stabilizing circuit 30.The magnitude of voltage of this control node continues to reduce.When the magnitude of voltage of this control node 60 was reduced to less than this switch threshold values of this first subcircuits 10, this first subcircuits 10 was to 30 power supplies of this voltage stabilizing circuit, but so that these voltage stabilizing circuit 30 regular supply direct currents to this main control circuit.Simultaneously, this first subcircuits 10 is to this capacitor C
4Charging.The magnitude of voltage of this control node 60 begins to increase, and when this switch threshold values of these first subcircuits such as magnitude of voltage of this control node 60, this first subcircuits 10 stops to 30 power supplies of this voltage stabilizing circuit.
As shown in Figure 3, this auxiliary power circuit according to a preferred embodiment of the invention, this first subcircuits 10 further comprises resistance R
1, resistance R
2, a diode D
5, a capacitor C
2, a voltage stabilizing didoe Z
1With a switch element Q
1This resistance R
1With this diode D
5Series connection, and this resistance R
1An end connect this input V
In, the other end connects this diode D
5Positive pole.This voltage stabilizing didoe Z
1With this resistance R
2After the series connection, again with this capacitor C
2Parallel connection, and then with the series connection mode be connected in this diode D
5Negative pole.It should be noted that this resistance R
2An end connect this diode D
5Negative pole, this resistance R
2The other end connect this voltage stabilizing didoe Z
1A negative pole, an anodal signal ground 19 that connects of this voltage stabilizing didoe.This capacitor C
2An end and this diode D
5Negative pole be connected in a node 11, this capacitor C
2The other end connect this signal ground 19.This switch element Q
1The D that connects this diode respectively
5Negative pole, this control node 60 and this voltage stabilizing didoe D
5With this resistance R
2Between a node 12, to control this first subcircuits 10 to this voltage stabilizing circuit 30 supply direct currents.That is to say this switch element Q
1Respectively with this voltage stabilizing didoe Z
1With this resistance R
2Between, this diode D
5Negative pole, this input of this voltage stabilizing circuit 30 connects, and answers direct current to control this first subcircuits 10 to this voltage stabilizing circuit 30.Preferably, this switch element Q
1It is MOSFET pipe.This switch element Q
1One the drain electrode with this diode D
5Negative pole connect this switch element Q
1A grid be connected in this voltage stabilizing didoe Z
1With this resistance R
2Between this node 12, this switch element Q
1One source pole be connected in this control node 60, that is to say this switch element Q
1One source pole be connected in an input of this voltage stabilizing circuit 30.This capacitor C
2It is a non-electrolytic capacitor.
When power initiation, the voltage of this control node 60 is lower than this diode D
5The voltage of negative pole.That is to say this switch element Q
1This source voltage be lower than this switch element Q
1This drain voltage, and this switch element Q
1This grid be applied in a positive voltage, this switch element Q
1Be in opening.And this switch element Q
1This grid be connected in this voltage stabilizing didoe Z
1With this resistance R
2Between, thereby make this switch element Q
1Grid voltage stablize constant.This input V of this auxiliary power circuit
InThrough this resistance R
1, this diode D
5With this switch element Q
1To these voltage stabilizing circuit 30 supply half-wave DC electricity of this auxiliary power circuit, thereby start this auxiliary power circuit.Simultaneously, this capacitor C
2Be in charged state.The magnitude of voltage of this control node 60 increases gradually.As this switch element Q
1This source voltage be equal to or greater than this switch element Q
1This grid voltage the time, this switch element Q
1Be in closed condition.That is to say this switch element Q
1This switch threshold values equal this Q
1Grid voltage.This first subcircuits 10 stops to 30 power supplies of this voltage stabilizing circuit.
When the half-wave DC electricity that inputs to this auxiliary power circuit was in the peak state, this second subcircuits 20 was to this output V
CcPower supply.When this half-wave DC electricity that inputs to this auxiliary power circuit during at the paddy state, this second subcircuits 20 stops these voltage stabilizing circuit 30 power supplies to this auxiliary power circuit.At this moment, this input terminal voltage of this this voltage stabilizing circuit 30 descends, and the magnitude of voltage of this control node 60 descends, and that is to say this switch element Q
1Source voltage descend.Though this capacitor C
4To voltage stabilizing circuit 30 power supplies of this auxiliary power circuit, because this capacitor C
4Capacity less, this capacitor C
4The electric weight that is replenished is not enough to replenish the drop-out value of these control node 60 voltages.And, as this switch element Q
1Source voltage drop to less than this switch element Q
1Grid voltage the time, this switch element Q
1Be in opening.These voltage stabilizing circuit 30 power supplies of these first subcircuits, 10 these auxiliary power circuits are to replenish this capacitor C
4Electricity shortage, thereby this voltage stabilizing circuit 30 of keeping this auxiliary power circuit is to this main control circuit stable power-supplying.The magnitude of voltage of this control node 60 begins to increase, as this switch element Q
1This source voltage be equal to or greater than this switch element Q
1This grid voltage the time, this switch element Q
1Be in closed condition.That is to say this switch element Q
1This switch threshold values equal this Q
1Grid voltage.This first subcircuits 10 stops to 30 power supplies of this voltage stabilizing circuit.
What deserves to be mentioned is, when the half-wave DC electricity of this auxiliary power circuit of input is in the peak state, as this diode D
5The magnitude of voltage of negative pole greater than this capacitor C
2Magnitude of voltage the time, this capacitor C
2Keep charged state.By this input V
InTo this electric capacity charging.
This second subcircuits 20 further comprises a transformer T
1With two diode D
2, D
3This transformer T
1Further comprise an one-level coil T
11With two secondary coil T
21, T
22, this transformer T
1This one-level coil T
11With this input V
InConnect this secondary coil T
21With this secondary coil T
22Abutting end connect a signal ground 24, this secondary coil T
22With this secondary coil T
21Abutting end connect this signal ground.This secondary coil T
21The other end with the series connection mode connect this diode D
2Positive pole.This secondary coil T
22The other end with the series connection mode connect this diode D
3Positive pole.This diode D
2With this diode D
3Parallel connection, this diode D
2Negative pole and this diode D
3Negative pole be connected to this voltage stabilizing circuit 30.
This capacitor C
4An end also be connected in this node 21, this capacitor C
4Other end ground connection.
As shown in Figure 3, this voltage stabilizing circuit 30 is preferably a series connection voltage stabilizing circuit, and this serial regulating circuit further comprises: a voltage stabilizing didoe Z
2, a triode Q
3With a resistance R
3, this voltage stabilizing didoe Z
2Negative pole connect the base stage of this triode, keeping base voltage constant, this triode Q
3Emitter and this output V
CcConnect, the collector electrode of this triode is connected this resistance R with this control node 60
3An end be connected this resistance R with this control node 60
3The other end be connected this voltage stabilizing didoe Z2 and this triode Q
3Between.This voltage stabilizing didoe Z
2Minus earth.
In order to make this output V
CcThe voltage of output is more stable, and this auxiliary power circuit further comprises a filter capacitor C
3, this filter capacitor and this output V
CcConnect, to improve this output V
CcThe stability of power supply.
As shown in Figure 4, according to an alternative of first subcircuits of an auxiliary power circuit of above-mentioned preferred embodiment of the present invention.This first subcircuits 10A further comprises four diode D
5A, D
6A, D
7A, D
8A, two capacitor C
2A, C
2B, two resistance R
1A, R
2A, a voltage stabilizing didoe Z
1AWith a switch element Q
1AThis resistance R
1AWith this diode D
5ASeries connection, and this resistance R
1An end connect this input V
In, this resistance R
1AThe other end connect this diode D
5APositive pole.This diode D
8APositive pole connect a signal ground 19A, this diode D
8ANegative pole connect this capacitor C
2AAn end, this capacitor C
2AThe other end connect this diode D
5ANegative pole in a node 11A.This capacitor C
2BAn end connect this signal ground 19A, this capacitor C
2BThe other end connect this diode D
6APositive pole, this diode D
6ANegative pole connect this diode D
5ANegative pole in.This voltage stabilizing didoe Z
1APositive pole connect this signal ground 19A, this voltage stabilizing didoe Z
1ANegative pole connect this resistance R
2AAn end, this resistance R
2AThe other end connect this diode D
5ANegative pole.This diode D
7APositive pole be connected in this capacitor C
2AWith this diode D
8ANegative pole between, this diode D
7ANegative pole be connected in this capacitor C
2BWith this diode D
6APositive pole between.This switch element Q
1AConnect this voltage stabilizing didoe Z respectively
1ANegative pole and this resistance R
2ABetween, this diode D
5ANegative pole and this voltage stabilizing circuit 30.That is to say this switch element Q
1AConnect this diode D respectively
5ANegative pole, this voltage stabilizing didoe Z
1ANegative pole and this resistance R
2ABetween, this controls node 60.This switch element Q
1ABe preferably MOSFET pipe, to control this first subcircuits 10A to these voltage stabilizing circuit 30 power supplies.This switch element Q
1AA drain electrode be connected in this diode D
5ANegative pole, this switch element Q
1AGrid be connected in this voltage stabilizing didoe Z
1ANegative pole and this resistance R
2ABetween a node 12A, this voltage stabilizing didoe Z
1ACan make this switch element Q
1AGrid voltage stablize constant.This switch element Q
1ASource electrode be connected in this control node 60.This capacitor C
2AWith this capacitor C
2BBe non-electrolytic capacitor.
What deserves to be mentioned is, adopt above-mentioned connected mode, under charged state, this capacitor C
2AWith this capacitor C
2BBe to charge with the mode of series connection.Under discharge condition, this capacitor C
2AWith this capacitor C
2BBe to discharge in parallel.That is to say; The first subcircuits 10A of this alternative compares with first subcircuits 10 of this optimum embodiment shown in Figure 3; Be fed to the identical electric weight of this voltage stabilizing circuit 30, the discharge voltage of this alternative only needs the half the of this optimum embodiment, thereby this switch element Q
1AOn power consumption reduce half the, thereby improved the efficient of this auxiliary power circuit.
When power initiation, the voltage of this control node 60 is lower than the D of this diode
5AThe voltage of negative pole.That is to say this switch element Q
1AThis source voltage be lower than this switch element Q
1AThis drain voltage, and this switch element Q
1AThis grid be applied in a positive voltage, this switch element Q
1ABe in opening.And this switch element Q
1AThis grid be connected in this voltage stabilizing didoe Z
1AWith this resistance R
2ABetween, thereby make this switch element Q
1AGrid voltage stablize constant.This input V
InThrough this resistance R
1A, this diode D
5AWith this switch element Q
1ATo the voltage stabilizing circuit 30 of this auxiliary power circuit, thereby start this auxiliary power circuit.Simultaneously, this capacitor C
2AWith this capacitor C
2BBe in charged state.The magnitude of voltage of this control node 60 rises gradually.As this switch element Q
1AThis source voltage be equal to or greater than this switch element Q
1AThis grid voltage the time, this switch element Q
1ABe in closed condition.That is to say this switch element Q
1AThis switch threshold values equal this switch element Q
1AGrid voltage.This first subcircuits 10A stops to 30 power supplies of this voltage stabilizing circuit.。
When inputing to this defeated half-wave DC electricity that helps power circuit when being in the peak state, this second subcircuits 20 is to these voltage stabilizing circuit 30 power supplies.When this half-wave DC electricity that inputs to this auxiliary power circuit during at the paddy state, this second subcircuits 20 stops these voltage stabilizing circuit 30 power supplies to this auxiliary power circuit.At this moment, the magnitude of voltage of this control node 60 descends, and that is to say this switch element Q
1ASource voltage descend.Though this capacitor C
4To these voltage stabilizing circuit 30 power supplies of this auxiliary power circuit, because this capacitor C
4Capacity less, this capacitor C
4The electric weight that is replenished is not enough to replenish the drop-out value of these control node 60 voltages.And, as this switch element Q
1ASource voltage drop to less than this switch element Q
1AGrid voltage the time, this switch element Q
1ABe in opening.This capacitor C
2AWith this capacitor C
2BSupply direct currents to this voltage stabilizing circuit 30 of this auxiliary power circuit in parallel, to replenish this capacitor C
4Electricity shortage, thereby keep this auxiliary power circuit output V
CcStable supply direct current.The magnitude of voltage of this control node 60 begins to increase, as this switch element Q
1AThis source voltage be equal to or greater than this switch element Q
1AThis grid voltage the time, this switch element Q
1ABe in closed condition.This first subcircuits 10 stops to this voltage stabilizing circuit 30 supply direct currents.
What deserves to be mentioned is, at the half-wave DC electricity of this accessory power supply of input when being in the peak state, when the magnitude of voltage of this node 11A greater than this capacitor C
2AWith this capacitor C
2BMagnitude of voltage the time, this capacitor C
2AWith this capacitor C
2BMode with series connection is charged.
The present invention has also disclosed an auxiliary power circuit method of supplying power to, and this auxiliary power circuit is applied to be preferably the no electrolytic capacitor power supply among the power supply, and this auxiliary power circuit method of supplying power to may further comprise the steps:
Step 1: detect the state of this auxiliary power circuit, if be in this power initiation state, then execution in step 2; If the half-wave DC electricity that is supplied to this power supply is state at the peak; Then execution in step 3, if the half-wave DC electricity that is supplied to this power supply at the paddy state, then execution in step 2.
Step 2: one first subcircuits 10 by this auxiliary power circuit is supplied direct currents to a voltage stabilizing circuit 30 of this auxiliary power circuit.
Step 3: one second subcircuits 20 by this auxiliary power circuit is supplied direct currents to this voltage stabilizing circuit 30 of this auxiliary power circuit.
In above-mentioned steps 2, further may further comprise the steps:
Step 2.1: the relation of a switch threshold values that detects magnitude of voltage and this first subcircuits 10 of this voltage stabilizing circuit 30; Whether supply power to determine this first subcircuits 10 to this voltage stabilizing circuit 30 of this auxiliary power circuit; If the magnitude of voltage of this voltage stabilizing circuit 30 is less than this switch threshold values of this first subcircuits 10; Then execution in step 2.2, if the magnitude of voltage of this voltage stabilizing circuit 30 is equal to or greater than this switch threshold values of this first subcircuits 10, then return step 1.
Step 2.2: detect the state of this auxiliary power circuit, if be in this power initiation state, then execution in step 2.3, if be in be supplied to this auxiliary power circuit the half-wave DC electricity at the paddy state, then execution in step 2.4.
Step 2.3: by an input V of this auxiliary power circuit
InThrough this first subcircuits 10 these voltage stabilizing circuit 30 supply direct currents, to start power supply to this auxiliary power circuit.
Step 2.4: by these voltage stabilizing circuit 30 supply direct currents of the electric capacity in this first subcircuits 10, to keep this voltage stabilizing circuit 30 stable supply direct currents to this auxiliary power circuit.
In above-mentioned steps 3, further may further comprise the steps:
Step 3.1: detect whether the half-wave DC electricity that is supplied to this power supply is the peak state; If the half-wave DC electricity that is supplied to this auxiliary power circuit is at the paddy state; Then execution in step 3.2, if the half-wave DC electricity that is supplied to this accessory power supply at the peak state, then return step 1.
Step 3.2: one second subcircuits 20 by this auxiliary power circuit is supplied direct currents to this voltage stabilizing circuit 30 of this auxiliary power circuit.
Foregoing is giving an example of specific embodiment of the present invention, for the wherein not equipment of detailed description and structure, is to be understood that to taking existing common apparatus in this area and universal method to implement.
The above embodiment of the present invention is merely the usefulness that technical scheme of the present invention is described simultaneously, is merely enumerating of technical scheme of the present invention, is not limited to technical scheme of the present invention and protection range thereof.Adopt equivalent technologies means, equivalent apparatus etc. the improvement of claims of the present invention and the disclosed technical scheme of specification will be understood that it is not exceed claims of the present invention and the disclosed scope of specification.
Claims (14)
1. an auxiliary power circuit, supply is used for a power supply, and this auxiliary power circuit is connected with a main control circuit with a rectification circuit of this power supply respectively and is connected, and it is characterized in that, comprising:
One input, this input is connected with this rectification circuit of this power supply, being supplied to this auxiliary power circuit through the half-wave DC electricity of this rectification circuit rectification;
One first subcircuits;
One second subcircuits, this first subcircuits is connected this input respectively with this second subcircuits;
One voltage stabilizing circuit, this voltage stabilizing circuit connect this main control circuit of this first subcircuits, this second subcircuits and this power supply respectively; With
One output, this output are connected with the main control circuit of this voltage stabilizing circuit and this power supply respectively, with this main control circuit of supply direct current to this power supply;
Wherein, when this power initiation, supply direct current to this voltage stabilizing circuit by this first subcircuits; Thereby make this auxiliary power circuit start working, in working order down, when the half-wave DC electricity that is supplied to this auxiliary power circuit at the peak during state; Supply direct current to this voltage stabilizing circuit by this second subcircuits; Again by this voltage stabilizing circuit supply direct current to this output, when the half-wave DC electricity that is supplied to this auxiliary power circuit during at the paddy state, by this first subcircuits supply direct current to this voltage stabilizing circuit; Direct current after stablizing through this voltage stabilizing circuit is again supplied this main control circuit of direct current to this power supply at last to this output by this output.
2. auxiliary power circuit as claimed in claim 1 is characterized in that, this first subcircuits has a switch threshold values; Whether supply direct current to this voltage stabilizing circuit to control this first subcircuits; Wherein, when the magnitude of voltage of this voltage stabilizing circuit during less than this switch threshold values, this first subcircuits supply direct current is to this voltage stabilizing circuit; When the voltage of this voltage stabilizing circuit is that this first subcircuits stop supplies direct current is to this voltage stabilizing circuit being equal to or greater than this switch threshold values.
3. auxiliary power circuit as claimed in claim 2 is characterized in that this auxiliary power circuit further comprises a capacitor C
4, this capacitor C
4Connect this first subcircuits, this second subcircuits and this voltage stabilizing circuit respectively, this capacitor C
4A spot of filtering can be provided, disturb to reduce circuit.
4. auxiliary power circuit as claimed in claim 3 is characterized in that, preferably, and this capacitor C
4Be non-electrolytic capacitor, this capacitance can be≤0.47uF.
5. auxiliary power circuit as claimed in claim 1; It is characterized in that; This first subcircuits further comprises at least one electric capacity, and electric when being the state of paddy when the half-wave DC stream that is supplied to this accessory power supply, this electric capacity is supplied direct current through this first subcircuits to this voltage stabilizing circuit.
6. auxiliary power circuit as claimed in claim 1 is characterized in that, this first subcircuits further comprises a resistance R
1, a resistance R
2, a diode D
5, a capacitor C
2, a voltage stabilizing didoe Z
1With a switch element Q
1, this resistance R
1With this diode D
5Series connection, and this resistance R
1An end connect this input, the other end connects this diode D
5Positive pole, this voltage stabilizing didoe Z
1With this resistance R
2After the series connection, again with this capacitor C
2Parallel connection, and then with the series connection mode be connected in this diode D
5Negative pole, this switch element Q
1Respectively with, this voltage stabilizing didoe Z
1With this resistance R
2Between, the negative pole of this diode D5 is connected with this voltage stabilizing circuit, wherein, and this resistance R
2An end connect this diode D
5Negative pole, this resistance R
2The other end connect this voltage stabilizing didoe Z
1Negative pole, the positive pole of this voltage stabilizing didoe connects signal ground, this capacitor C
2An end and this diode D
5Negative pole connect this capacitor C
2The other end connect this signal ground, wherein, when the magnitude of voltage of this voltage stabilizing circuit less than this voltage stabilizing didoe Z
1With this resistance R
2Between magnitude of voltage, this switch element Q
1Be in opening, this first circuit branch is to this voltage stabilizing circuit supply direct current, when the magnitude of voltage of this voltage stabilizing circuit is equal to or greater than this voltage stabilizing didoe Z
1With this resistance R
2Between magnitude of voltage, this first circuit branch circuit stops to this serial regulating circuit supply direct current.
7. auxiliary power circuit as claimed in claim 1 is characterized in that, this first subcircuits further comprises: four diode D
5A, D
6A, D
7A, D
8A, two capacitor C
2A, C
2B, two resistance R
1A, R
2A, a voltage stabilizing didoe Z
1AWith a switch element Q
1A, this resistance R
1AWith this diode D
5ASeries connection, and this resistance R
1An end connect this input, this resistance R
1AThe other end connect this diode D
5APositive pole, this diode D
8APositive pole connect a signal ground, this diode D
8ANegative pole connect this capacitor C
2AAn end, this capacitor C
2AThe other end connect this diode D
5ANegative pole, this capacitor C
2BAn end connect this signal ground, this capacitor C
2BThe other end connect this diode D
6APositive pole, this diode D
6ANegative pole connect this diode D
5ANegative pole, this voltage stabilizing didoe Z
1APositive pole connect this signal ground, this voltage stabilizing didoe Z
1ANegative pole connect this resistance R
2AAn end, this resistance R
2AThe other end connect this diode D
5ANegative pole, this diode D
7APositive pole be connected in this capacitor C
2AWith this diode D
8ANegative pole between, this diode D
7ANegative pole be connected in this capacitor C
2BWith this diode D
6APositive pole between, this switch element Q
1AConnect this voltage stabilizing didoe Z respectively
1ANegative pole and this resistance R
2ABetween, this diode D
5ANegative pole and this voltage stabilizing circuit, wherein, when the magnitude of voltage of this voltage stabilizing circuit less than this voltage stabilizing didoe Z
1ANegative pole and this resistance R
2ABetween magnitude of voltage, this switch element Q
1ABe in opening, this first subcircuits is to this voltage stabilizing circuit supply direct current, when the magnitude of voltage of voltage stabilizing circuit greater than this voltage stabilizing didoe Z
1APositive pole and this resistance R
2ABetween magnitude of voltage, this first subcircuits stops to this voltage stabilizing circuit supply direct current.
8. like claim 6 and 7 described auxiliary power circuits, it is characterized in that this second subcircuits further comprises a transformer T
1With two diode D
2, D
3, this transformer T
1Further comprise an one-level coil T
11With two secondary coil T
21, T
22, this transformer T
1This one-level coil T
11Be connected this secondary coil T with this input
21With this secondary coil T
22Abutting end connect a signal ground, this secondary coil T
22With this secondary coil T
21Abutting end connect this signal ground, this secondary coil T
21The other end with the series connection mode connect this diode D
2Positive pole, this secondary coil T
22The other end with the series connection mode connect this diode D
3Positive pole.This diode D
2Negative pole and this diode D
3Negative pole be connected with this voltage stabilizing circuit respectively.
9. like the said auxiliary power circuit of claim 8, it is characterized in that this auxiliary power circuit further comprises a voltage stabilizing circuit, this voltage stabilizing circuit further comprises a voltage stabilizing didoe Z
2, a triode Q
3With a resistance R
3, this voltage stabilizing didoe Z
2Negative pole connect the base stage of this triode, to keep base voltage constant, the emitter of this triode is connected with this output end of pressure-stabilizing, the collector electrode of this triode is connected this resistance R with this control node
3An end be connected this resistance R with this control node
3The other end be connected this voltage stabilizing didoe Z
2With this triode Q
3Between, this voltage stabilizing didoe Z
2Plus earth.
10. auxiliary power circuit as claimed in claim 9 is characterized in that, this auxiliary power circuit further comprises a filter capacitor C
3, this filter capacitor is connected with this output, to improve the stability of this output power supply.
11. auxiliary power circuit as claimed in claim 1 is characterized in that, this voltage stabilizing circuit is a serial regulating circuit.
12. the method for supplying power to of an auxiliary power circuit, this auxiliary power circuit are applied in the power supply, with supply direct current to a main control circuit, it is characterized in that the method for supplying power to of this auxiliary power circuit may further comprise the steps:
Step 1: detect the state of this auxiliary power circuit, if be in this power initiation state, then execution in step 2; If the half-wave DC electricity that is supplied to this power supply is state at the peak; Then execution in step 3, if the half-wave DC electricity that is supplied to this power supply at the paddy state, then execution in step 2;
Step 2: one first subcircuits by this auxiliary power circuit is supplied direct current to a voltage stabilizing circuit of this auxiliary power circuit;
Step 3: one second subcircuits by this auxiliary power circuit is supplied direct current to this voltage stabilizing circuit of this auxiliary power circuit.
13. the method for supplying power to of auxiliary power circuit as claimed in claim 12 is characterized in that, this step 2 further may further comprise the steps:
Step 2.1: the relation of a switch threshold values that detects magnitude of voltage and this first subcircuits of this voltage stabilizing circuit; Whether supply power to determine this first subcircuits to the voltage stabilizing circuit of this auxiliary power circuit; If the magnitude of voltage of this voltage stabilizing circuit is less than this switch threshold values of this first subcircuits; Then execution in step 2.2, if the magnitude of voltage of this voltage stabilizing circuit is equal to or greater than this switch threshold values of this first subcircuits, then return step 1;
Step 2.2: detect the state of this auxiliary power circuit, if be in this power initiation state, then execution in step 2.3, if be in be supplied to this power supply the half-wave DC electricity at the paddy state, then execution in step 2.4;
Step 2.3: the input by this auxiliary power circuit is supplied direct current through this first subcircuits to this voltage stabilizing circuit of this auxiliary power circuit, to start power supply;
Step 2.4: by this voltage stabilizing circuit supply direct current of the electric capacity in this first subcircuits 10, to keep the stable supply of this voltage stabilizing circuit direct current to this auxiliary power circuit.
14. the method for supplying power to of auxiliary power circuit as claimed in claim 12 is characterized in that, this step 3 further may further comprise the steps:
Step 3.1: detect whether the half-wave DC electricity be supplied to this power supply is the peak state, if the half-wave DC electricity that is supplied to this power supply at the peak state, then execution in step 3.2, if the half-wave DC electricity that is supplied to this power supply state at the peak not then returns step 1;
Step 3.2: one second subcircuits by this auxiliary power circuit is supplied direct current to this voltage stabilizing circuit of this auxiliary power circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210239411.7A CN102739046B (en) | 2012-06-29 | 2012-06-29 | Auxiliary power supply circuit without electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210239411.7A CN102739046B (en) | 2012-06-29 | 2012-06-29 | Auxiliary power supply circuit without electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
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| CN102739046A true CN102739046A (en) | 2012-10-17 |
| CN102739046B CN102739046B (en) | 2015-07-15 |
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|---|---|---|---|
| CN201210239411.7A Expired - Fee Related CN102739046B (en) | 2012-06-29 | 2012-06-29 | Auxiliary power supply circuit without electrolytic capacitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103066824A (en) * | 2012-12-19 | 2013-04-24 | 华南理工大学 | Auxiliary power supply used for switching power supply and driving method of the auxiliary power supply |
| CN110138226A (en) * | 2019-05-27 | 2019-08-16 | 同济大学 | Constant pressure and flow for submarine observation network inputs changeable DC converter and method |
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| CN101106329A (en) * | 2006-07-12 | 2008-01-16 | 电力集成公司 | Method and apparatus for a high voltage power supply circuit |
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| JP2010075034A (en) * | 2008-08-21 | 2010-04-02 | Panasonic Electric Works Co Ltd | Load controller, and load control system equipped with the same |
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| CN1107622A (en) * | 1993-06-10 | 1995-08-30 | Gec阿尔斯托姆T&D公司 | Device for supplying a voltage to an electronic circuit in particular an electronic circuit associated with a current sensor disposed on an electrical line |
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| CN103066824A (en) * | 2012-12-19 | 2013-04-24 | 华南理工大学 | Auxiliary power supply used for switching power supply and driving method of the auxiliary power supply |
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| CN110138226A (en) * | 2019-05-27 | 2019-08-16 | 同济大学 | Constant pressure and flow for submarine observation network inputs changeable DC converter and method |
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|---|---|
| CN102739046B (en) | 2015-07-15 |
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