CN104167783A - Direct-current power source low ripple wave implementation method and circuits with batteries supplying power continuously - Google Patents
Direct-current power source low ripple wave implementation method and circuits with batteries supplying power continuously Download PDFInfo
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- CN104167783A CN104167783A CN201410383814.8A CN201410383814A CN104167783A CN 104167783 A CN104167783 A CN 104167783A CN 201410383814 A CN201410383814 A CN 201410383814A CN 104167783 A CN104167783 A CN 104167783A
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Abstract
Provided is a direct-current power source low ripple wave implementation method with batteries supplying power continuously. The rechargeable and non-ripple-wave direct-current batteries supply power to a load through a linear voltage adjusting circuit, the number of the direct-current batteries is two, only one direct-current battery supplies power at the same moment, and the direct-current battery supplying power is not charged; if the other battery is full of power, the battery is in a standby state and otherwise, the battery is charged. The invention further provides corresponding implementation circuits, and the circuits comprise a charging circuit, a charging selection circuit, a control circuit, a first direct-current battery, a second direct-current battery, a power supplying selection circuit and the linear voltage adjusting circuit. According to the direct-current power source low ripple wave implementation method and the implementation circuits, inherent power frequency ripple waves of an alternating-current rectification circuit can be thoroughly eliminated, low ripple waves of a direct-current output power source are achieved, and continuous power energy supply of the direct-current power source is guaranteed.
Description
Technical field
The invention belongs to fine measuring instrument field, be applied to need the occasion of ultralow ripple DC power supply, be specifically related to a kind of DC power supply low ripple implementation method and circuit of battery continued power.
Background technology
Improving accuracy of measurement is the free-revving engine of signal measurement, and reducing all kinds of errors is the important method that improve accuracy of measurement, and DC power supply ripple is one of main contributor producing signal errors.DC power supply can be divided into diode industrial frequency rectifying stabilized voltage power supply and Switching Power Supply by its operating frequency, utilize battery as shown in Figure 3 directly to power and industrial frequency rectifying power circuit, it is that ripple analysis (nominal operation electric current is respectively 200mA, 100mA, 50mA and 5mA) is carried out in the load of 45 Ω, 90 Ω, 180 Ω and 1800 Ω that two kinds of power supplys are loaded respectively to normal resistance, draw the ripple voltage waveform of two kinds of power supplys under different loads, design parameter is in Table 1.
Table 1 battery is directly powered and is connected the ripple of different ohmic loads from industrial frequency rectifying power supply
From result, the ripple of the direct power supply of battery is substantially zero, and DC power supply after conventional diode industrial frequency rectifying has larger working frequency ripple wave, needs the filtering device of larger capacity; Switching Power Supply adopts high-frequency work, filtering device volume and volume lowering, but still there is high frequency ripple and working frequency ripple wave, can reduce ripple by increasing circuit filtering device, but still not reach the requirement of high-acruracy survey.
The laboratory and the workplace that in some high-acruracy surveys, require, wish to obtain high-quality direct current power supply, and itself there is no the direct power supply of dc-battery of ripple is a kind of good selection, but the finite capacity of battery needs frequent charge.The mode of some Alternating Current Power Supply, battery back up for power acquisition, can guarantee to exchange the power supply in a period of time after dead electricity, but under normal condition, the ripple of Alternating Current Power Supply still exists.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of DC power supply low ripple implementation method and circuit of battery continued power, utilize two dc-batteries, power and another charging for one, can realize lasting low ripple power supply.
To achieve these goals, the technical solution used in the present invention is:
A kind of DC power supply low ripple implementation method of battery continued power, the dc-battery of chargeable, ripple-free powers to the load after by linear voltage Circuit tuning, described dc-battery has two, at synchronization, only there is a dc-battery to power, and the dc-battery of power supply is in non-charged state, if another battery electric weight is completely, in stand-by state, otherwise in charged state.
If the electric weight of two batteries is all higher than power supply threshold value, select the dc-battery that wherein electric weight is higher to power until lower than power supply threshold value, select another dc-battery to charge until be full of, standby, if the dc-battery electric weight in charging is not yet full of, supplying cell has needed to continue power supply lower than the load simultaneously of power supply threshold value, stop charging, switch the charging state of two dc-batteries;
If the electric weight of the electric weight of a dc-battery another dc-battery higher than power supply threshold value is lower than power supply threshold value, select the dc-battery that electric weight is high to power until lower than power supply threshold value, select another dc-battery to charge until be full of, standby, if the dc-battery electric weight in charging is higher than power supply threshold value but be not yet full of and supplying cell electric weight has needed to continue power supply lower than the simultaneously load of power supply threshold value, stop charging, switch the charging state of two dc-batteries;
If the electric weight of two dc-batteries is all lower than power supply threshold value, sound and light alarm time delay were stopped power supply after power supply a period of time, select the battery that wherein electric weight is low to charge to electric weight completely, again another battery is charged until this battery electric quantity is full, in the situation that two dc-battery electric weight are all full, just start again to load supplying.
The present invention provides a kind of DC power supply low ripple of battery continued power to realize circuit simultaneously, comprising:
Charging circuit, connects alternating current and provides rechargeable electrical energy for dc-battery;
Circuit is selected in charging, and according to the signal of control circuit, by switch, controlling charging circuit is that the first dc-battery or the second dc-battery charge;
Control circuit, gathers the electric weight of the first dc-battery and the second dc-battery, select wherein electric weight higher and higher than power supply threshold value person for linear voltage Circuit tuning supplies power to lower than power supply threshold value, select electric weight junior to charge to electric weight completely;
The first dc-battery, when electric weight is greater than power supply threshold value and the second dc-battery and supplies power to lower than power supply threshold value, is the power supply of linear voltage Circuit tuning;
The second dc-battery, when electric weight is greater than power supply threshold value and the first dc-battery and supplies power to lower than power supply threshold value, is the power supply of linear voltage Circuit tuning;
Circuit is selected in power supply, according to the signal of control circuit, by switch, controls the first dc-battery or the second dc-battery is that linear voltage Circuit tuning is powered;
Linear voltage Circuit tuning, it is load supplying that battery powered direct voltage is carried out after linearity adjustment.
Described the first dc-battery and the second dc-battery are positive polarity output, described charging selects circuit to comprise charge switch S1 in parallel and the charge switch S3 that all connects charging circuit output, charge switch S1 connects the anode of diode D1, the negative electrode of diode D1 connects one end of positive pole and the power switch S2 of the first dc-battery, the another end of power switch S2 connects the anode of diode D2, the negative electrode of diode D2 connects the input of linear voltage-regulating circuit and the positive pole of electrochemical capacitor C1, the minus earth of electrochemical capacitor C1; The minus earth of the first dc-battery; Charge switch S3 connects the anode of diode D3, the negative electrode of diode D3 connects one end of positive pole and the power switch S4 of the second dc-battery, the another end of power switch S4 connects the anode of diode D4, and the negative electrode of diode D4 connects the input of linear voltage-regulating circuit and the positive pole of electrochemical capacitor C1; The minus earth of the second dc-battery; Described control circuit obtains charged state by the electric current at monitoring charge switch S1 and charge switch S3 place, and open and close and be chosen as the first dc-battery or the second dc-battery charges by controlling charge switch S1 and charge switch S3, electric current by monitoring power switch S2 and power switch S4 place obtains power supply state, and by controlling power switch S2 and power switch S4 keying is chosen as the first dc-battery or the second dc-battery is powered.
Described the first dc-battery and the second dc-battery are negative polarity output, described charging selects circuit to comprise charge switch S5 in parallel and the charge switch S7 that all connects charging circuit output, charge switch S5 connects the negative electrode of diode D5, the negative pole of anodic bonding the first dc-battery of diode D5 and one end of power switch S6, the another end of power switch S6 connects the negative electrode of diode D6, the input of anodic bonding linear voltage Circuit tuning of diode D6 and the negative pole of electrochemical capacitor C3, the plus earth of electrochemical capacitor C3; The plus earth of the first dc-battery; Charge switch S7 connects the negative electrode of diode D7, the negative pole of anodic bonding the second dc-battery of diode D7 and one end of power switch S8, the another end of power switch S8 connects the negative electrode of diode D8, the input of anodic bonding linear voltage Circuit tuning of diode D8 and the negative pole of electrochemical capacitor C3; The plus earth of the second dc-battery; Described control circuit obtains charged state by the electric current at monitoring charge switch S5 and charge switch S7 place, and open and close and be chosen as the first dc-battery or the second dc-battery charges by controlling charge switch S5 and charge switch S7, electric current by monitoring power switch S6 and power switch S8 place obtains power supply state, and by controlling power switch S6 and power switch S8 keying is chosen as the first dc-battery or the second dc-battery is powered.
Described the first dc-battery and the second dc-battery are positive polarity battery, described control circuit comprises the voltage collection circuit that connects diode D1 anode, the voltage collection circuit that connects diode D2 anode, the voltage collection circuit that connects diode D3 anode, the voltage collection circuit that connects diode D4 anode, the voltage collection circuit that connects the first dc-battery positive pole, the current collection circuit that connects the first dc-battery negative pole, the voltage collection circuit that connects the second dc-battery positive pole, the current collection circuit that connects the second dc-battery negative pole, Acquisition Circuit output connects respectively two 2 input NOR gate and four 3 input NOR gate, the output of four 3 input NOR gate is connecting valve S1 respectively, switch S 2, switch S 3, the control end of switch S 4.
Described the first dc-battery and the second dc-battery are negative polarity battery, described control circuit comprises the voltage collection circuit that connects diode D5 negative electrode, the voltage collection circuit that connects diode D6 negative electrode, the voltage collection circuit that connects diode D7 negative electrode, the voltage collection circuit that connects diode D8 negative electrode, the voltage collection circuit that connects the first dc-battery negative pole, the current collection circuit that connects the first dc-battery positive pole, the voltage collection circuit that connects the second dc-battery negative pole, the current collection circuit that connects the second dc-battery positive pole, Acquisition Circuit output connects respectively two 2 input NOR gate and four 3 input NOR gate, the output of four 3 input NOR gate is connecting valve S5 respectively, switch S 6, switch S 7, the control end of switch S 8.
Described the first dc-battery and the second dc-battery are positive polarity output, linear voltage Circuit tuning comprises the LM78 series series voltage stabilizing chip that connects the output of power supply selection circuit, voltage stabilizing chip earth terminal ground connection, it is anodal that voltage stabilizing chip output connects electrochemical capacitor C2, electrochemical capacitor C2 minus earth.
Described the first dc-battery and the second dc-battery are negative polarity output, linear voltage Circuit tuning comprises the LM79 series series voltage stabilizing chip that connects the output of power supply selection circuit, voltage stabilizing chip earth terminal ground connection, voltage stabilizing chip output connects electrochemical capacitor C4 negative pole, electrochemical capacitor C4 plus earth.
Compared with prior art, the invention has the beneficial effects as follows:
1) adopt dc-battery to substitute diode rectification power frequency supply, eliminate the input ripple of rear class voltage-regulating circuit; Adopt linear voltage Circuit tuning, reduce the harmonic wave that switch adjustment produces; Above technical tie-up is used, and guarantees to realize the output low ripple of whole circuit.
2) adopt incomplementarity power supply to select circuit, the unperturbed switching between guarantee battery and the level and smooth output of electric energy; Adopt incomplementarity charging to select circuit, guarantee the lasting electric power supply of late-class circuit.
3) charger, diode, battery, electrochemical capacitor and testing circuit adopt reversal to adapt to the requirement of positive-negative polarity Voltage-output; Positive polarity and negative polarity power source combination get up to realize the output low ripple of bipolarity DC power supply.
Accompanying drawing explanation
Fig. 1 is that the positive polarity DC power supply low ripple of battery continued power is realized principle schematic.
Fig. 2 is that the negative polarity DC power supply low ripple of battery continued power is realized principle schematic.
Fig. 3 is the ripple test circuit diagram of direct supplying cell and industrial frequency rectifying power supply.
Embodiment
Below in conjunction with drawings and Examples, describe embodiments of the present invention in detail.
A kind of DC power supply low ripple implementation method of battery continued power, the dc-battery of chargeable, ripple-free powers to the load after by linear voltage Circuit tuning, dc-battery has two, at synchronization, only there is a dc-battery to power, and the dc-battery of power supply is in non-charged state, if another battery electric weight is completely, in stand-by state, otherwise in charged state.That is, exchange the not directly linear voltage Circuit tuning power supply to rear class of industrial frequency rectifying voltage of input, only give the not under-voltage dc-battery charging in power supply state; The dc-battery that electric weight is full of or in stand-by state, or independently-powered to the voltage-regulating circuit of rear class; Must there be the dc-battery of an electric energy abundance in any normal moment as the direct current input of voltage-regulating circuit; By the input using the dc-battery of ripple-free own as voltage-regulating circuit, and the linear voltage Circuit tuning that adopts low harmonic wave, the ripple that AC power frequency rectification or Switching Power Supply are brought reduced; By AC power, charge to under-voltage dc-battery of not powering simultaneously, for rear class voltage-regulating circuit provides lasting dc-battery power supply, ensure, realize lasting low ripple power supply.
The invention provides the physical circuit of realizing said method comprises:
Charging circuit, connects alternating current and provides rechargeable electrical energy for dc-battery;
The first dc-battery, when electric weight is greater than power supply threshold value and the second dc-battery and supplies power to lower than power supply threshold value, is the power supply of linear voltage Circuit tuning;
The second dc-battery, when electric weight is greater than power supply threshold value and the first dc-battery and supplies power to lower than power supply threshold value, is the power supply of linear voltage Circuit tuning;
Linear voltage Circuit tuning, it is load supplying that battery powered direct voltage is carried out after linearity adjustment.
Circuit is selected in charging, and according to the signal of control circuit, by switch, controlling charging circuit is that the first dc-battery or the second dc-battery charge; Circuit is selected in power supply, according to the signal of control circuit, by switch, controls the first dc-battery or the second dc-battery is that linear voltage Circuit tuning is powered; Charging is selected circuit and power supply to select circuit to form prime direct current energy and is ensured circuit, provide lasting, without the direct voltage of working frequency ripple wave.
Control circuit, gathers the electric weight of the first dc-battery and the second dc-battery, select wherein electric weight higher and higher than power supply threshold value person for linear voltage Circuit tuning supplies power to lower than power supply threshold value, select electric weight junior to charge to electric weight completely.Specific strategy is as follows:
If the electric weight of two batteries is all higher than power supply threshold value, select the dc-battery that wherein electric weight is higher to power until lower than power supply threshold value, select another dc-battery to charge until be full of, standby, if the dc-battery electric weight in charging is not yet full of, supplying cell has needed to continue power supply lower than the load simultaneously of power supply threshold value, stop charging, switch the charging state of two dc-batteries;
If the electric weight of the electric weight of a dc-battery another dc-battery higher than power supply threshold value is lower than power supply threshold value, select the dc-battery that electric weight is high to power until lower than power supply threshold value, select another dc-battery to charge until be full of, standby, if the dc-battery electric weight in charging is higher than power supply threshold value but be not yet full of and supplying cell electric weight has needed to continue power supply lower than the simultaneously load of power supply threshold value, stop charging, switch the charging state of two dc-batteries;
If the electric weight of two dc-batteries is all lower than power supply threshold value, sound and light alarm time delay were stopped power supply after power supply a period of time, select the battery that wherein electric weight is low to charge to electric weight completely, again another battery is charged until this battery electric quantity is full, in the situation that two dc-battery electric weight are all full, just start again to load supplying.
Above-mentioned control strategy can guarantee that exporting electric energy is supplied with by dc-battery completely, when the dc-battery electric energy of powering and not charging, lower than power supply threshold value, the electric energy of another battery is higher and during higher than power supply threshold value in realization, switch supplying cell, and guarantee that any time only has the dc-battery of a dc-battery power supply and power supply not in charged state.After the high dc-battery power switch closure of electric energy, in the power switch that the dc-battery low with electric energy is connected, do not have electric current to pass through, now disconnect and can not produce the electromagnetic interference such as spark.
Above-mentioned control strategy can guarantee that dc-battery has lasting electric energy simultaneously, when not enough and another dc-battery electric energy of one of them dc-battery electric energy is higher, select electric energy high and power higher than the dc-battery of power supply threshold value, select the low dc-battery of electric energy to charge, so just can guarantee the sustainable supply of electric energy; Meanwhile, any time only charges to electric weight completely to a dc-battery of not powering; Extremely in particular cases, when two dc-battery electric energy are all not enough, to rear class power supply, till selecting a lower dc-battery of electric energy first to charge to 2 battery electric quantities all to expire.
Different according to DC power supply polarity, the DC power supply low ripple of above-mentioned battery continued power is realized the concrete structure that circuit can be taked following two embodiment.
Embodiment 1
As shown in Figure 1, the first dc-battery B1 and the second dc-battery B2 are positive polarity output, charging selects circuit to comprise charge switch S1 in parallel and the charge switch S3 that all connects charging circuit output, charge switch S1 connects the anode of diode D1, the negative electrode of diode D1 connects one end of positive pole and the power switch S2 of the first dc-battery B1, the another end of power switch S2 connects the anode of diode D2, the negative electrode of diode D2 connects the input of linear voltage-regulating circuit and the positive pole of electrochemical capacitor C1, the minus earth of electrochemical capacitor C1; The minus earth of the first dc-battery; Charge switch S3 connects the anode of diode D3, the negative electrode of diode D3 connects one end of positive pole and the power switch S4 of the second dc-battery B2, the another end of power switch S4 connects the anode of diode D4, and the negative electrode of diode D4 connects the input of linear voltage-regulating circuit and the positive pole of electrochemical capacitor C1; The minus earth of the second dc-battery.Diode D2, D4 and electrochemical capacitor C1 be for the level and smooth supply that guarantees to export electric energy, prevents the electric energy transfer between the different dc-battery of 2 voltage;
Control circuit obtains charged state by the electric current at monitoring charge switch S1 and charge switch S3 place, and open and close and be chosen as the first dc-battery B1 or the second dc-battery B2 charges by controlling charge switch S1 and charge switch S3, electric current by monitoring power switch S2 and power switch S4 place obtains power supply state, and open and close and be chosen as the first dc-battery B1 or the second dc-battery B2 powers by controlling power switch S2 and power switch S4, by monitor the positive terminal voltage of the first dc-battery be connected with negative terminal electric current 2 input NOR gate obtain the first dc-battery state of charge, and by monitor the positive terminal voltage of the second dc-battery be connected with negative terminal electric current 2 input NOR gate obtain the second dc-battery state of charge.
Control circuit adopts charge switch S1, the power switch S2, charge switch S3, power switch S4, the first dc-battery state of charge and the second dc-battery state of charge that monitor as control inputs, controls the keying of charge switch S1, power switch S2, charge switch S3 and power switch S4 by 3 input NOR gate logic outputs.
The operation principle of the present embodiment is as follows:
The control logic of charge switch (take S1 as example) can be expressed as
When following condition meets simultaneously: (1) B1 battery electric quantity is not enough (voltage is lower when uncharged, or charging current large (underfill)), and (2) B1 is to rear class power supply, and S2 disconnects, and (3) charging circuit is to B2 charging, and S3 disconnects; Now S1 connects, and B1 is charged.
When one of following condition meets: (1), when B1 battery electric quantity foot (voltage is higher when uncharged, or charging current is less), (2) B1 powers to rear class, and S2 connects, and (3) charging circuit charges to B2, and S3 connects; Now S1 disconnects.
When B1 and B2 voltage are all high, S1 and S3 all disconnect.
The control logic of power switch (take S2 as example) can be expressed as
When following condition meets simultaneously: (1) B1 voltage is high, and (2) B1 is uncharged, and S1 disconnects, and (3) B2 does not power, and S4 disconnects; Now S2 connects, and B1 powers to rear class.
When one of following condition meets: (1) B1 voltage is not high, and (2) B2 voltage is high, (3) B1 charging, S1 connects; Now S2 disconnects, and B1 does not power to rear class.
Wherein: logical symbol " " represents " logical AND " or " logic multiply ", when condition meets simultaneously, output is just effective.
Logical symbol "+" represents " logic OR " or " logic add ", and when one of condition is met, output just effectively.
For positive polarity output circuit, guarantee generally when S1, S2 are different to connect, when S3, S4 are different, connect, when S1, S3 are different, connect, S2, S4 can connect simultaneously.
Embodiment 2
As shown in Figure 2, the first dc-battery B3 and the second dc-battery B4 are negative polarity output, charging selects circuit to comprise charge switch S5 in parallel and the charge switch S7 that all connects charging circuit output, charge switch S5 connects the negative electrode of diode D5, the negative pole of anodic bonding the first dc-battery B3 of diode D5 and one end of power switch S6, the another end of power switch S6 connects the negative electrode of diode D6, the input of anodic bonding linear voltage Circuit tuning of diode D6 and the negative pole of electrochemical capacitor C3, the plus earth of electrochemical capacitor C3; The plus earth of the first dc-battery.Charge switch S7 connects the negative electrode of diode D7, the negative pole of anodic bonding the second dc-battery B4 of diode D7 and one end of power switch S8, the another end of power switch S8 connects the negative electrode of diode D8, the input of anodic bonding linear voltage Circuit tuning of diode D8 and the negative pole of electrochemical capacitor C3; The plus earth of the second dc-battery.Diode D6, D8 and electrochemical capacitor C3 be for the level and smooth supply that guarantees to export electric energy, prevents the electric energy transfer between the different dc-battery of 2 voltage;
Control circuit obtains charged state by the electric current at monitoring charge switch S5 and charge switch S7 place, and open and close and be chosen as the first dc-battery B3 or the second dc-battery B4 charges by controlling charge switch S5 and charge switch S7, electric current by monitoring power switch S6 and power switch S8 place obtains power supply state, and by controlling power switch S6 and power switch S8 keying is chosen as the first dc-battery B3 or the second dc-battery B4 powers.
The control principle of the present embodiment and embodiment 1 are roughly the same.
Linear regulating circuit of the present invention is powered and is selected the LM78/LM79 series series voltage stabilizing chip of circuit output to obtain fixed voltage to export by connection, by connecting voltage stabilization in the short time that the electrochemical capacitor C1/C3 of voltage stabilizing chip output guarantees that power supply circuits switch, exports.
Claims (9)
1. the DC power supply low ripple implementation method of a battery continued power, the dc-battery of chargeable, ripple-free powers to the load after by linear voltage Circuit tuning, it is characterized in that, described dc-battery has two, at synchronization, only there is a dc-battery to power, and the dc-battery of power supply is in non-charged state, if another battery electric weight completely, in stand-by state, otherwise in charged state.
2. the DC power supply low ripple implementation method of battery continued power according to claim 1, is characterized in that, electric energy loaded completely by two dc-battery alternative supplies,
If the electric weight of two batteries is all higher than power supply threshold value, select the dc-battery that wherein electric weight is higher to power until lower than power supply threshold value, select another dc-battery to charge until be full of, standby, if the dc-battery electric weight in charging is not yet full of, supplying cell has needed to continue power supply lower than the load simultaneously of power supply threshold value, stop charging, switch the charging state of two dc-batteries;
If the electric weight of the electric weight of a dc-battery another dc-battery higher than power supply threshold value is lower than power supply threshold value, select the dc-battery that electric weight is high to power until lower than power supply threshold value, select another dc-battery to charge until be full of, standby, if the dc-battery electric weight in charging is higher than power supply threshold value but be not yet full of and supplying cell electric weight has needed to continue power supply lower than the simultaneously load of power supply threshold value, stop charging, switch the charging state of two dc-batteries;
If the electric weight of two dc-batteries is all lower than power supply threshold value, sound and light alarm time delay were stopped power supply after power supply a period of time, select the battery that wherein electric weight is low to charge to electric weight completely, again another battery is charged until this battery electric quantity is full, in the situation that two dc-battery electric weight are all full, just start again to load supplying.
3. the DC power supply low ripple of battery continued power is realized a circuit, it is characterized in that, comprising:
Charging circuit, connects alternating current and provides rechargeable electrical energy for dc-battery;
Circuit is selected in charging, and according to the signal of control circuit, by switch, controlling charging circuit is that the first dc-battery or the second dc-battery charge;
Control circuit, gathers the electric weight of the first dc-battery and the second dc-battery, select wherein electric weight higher and higher than power supply threshold value person for linear voltage Circuit tuning supplies power to lower than power supply threshold value, select electric weight junior to charge to electric weight completely;
The first dc-battery, when electric weight is greater than power supply threshold value and the second dc-battery and supplies power to lower than power supply threshold value, is the power supply of linear voltage Circuit tuning;
The second dc-battery, when electric weight is greater than power supply threshold value and the first dc-battery and supplies power to lower than power supply threshold value, is the power supply of linear voltage Circuit tuning;
Circuit is selected in power supply, according to the signal of control circuit, by switch, controls the first dc-battery or the second dc-battery is that linear voltage Circuit tuning is powered;
Linear voltage Circuit tuning, it is load supplying that battery powered direct voltage is carried out after linearity adjustment.
4. the DC power supply low ripple of battery continued power is realized circuit according to claim 3, it is characterized in that, described the first dc-battery and the second dc-battery are positive polarity output, described charging selects circuit to comprise charge switch S1 in parallel and the charge switch S3 that all connects charging circuit output, charge switch S1 connects the anode of diode D1, the negative electrode of diode D1 connects one end of positive pole and the power switch S2 of the first dc-battery, the another end of power switch S2 connects the anode of diode D2, the negative electrode of diode D2 connects the input of linear voltage-regulating circuit and the positive pole of electrochemical capacitor C1, the minus earth of electrochemical capacitor C1, the minus earth of the first dc-battery, charge switch S3 connects the anode of diode D3, the negative electrode of diode D3 connects one end of positive pole and the power switch S4 of the second dc-battery, the another end of power switch S4 connects the anode of diode D4, and the negative electrode of diode D4 connects the input of linear voltage-regulating circuit and the positive pole of electrochemical capacitor C1, the minus earth of the second dc-battery, described control circuit obtains charged state by the electric current at monitoring charge switch S1 and charge switch S3 place, and open and close and be chosen as the first dc-battery or the second dc-battery charges by controlling charge switch S1 and charge switch S3, electric current by monitoring power switch S2 and power switch S4 place obtains power supply state, and by controlling power switch S2 and power switch S4 keying is chosen as the first dc-battery or the second dc-battery is powered.
5. the DC power supply low ripple of battery continued power is realized circuit according to claim 3, it is characterized in that, described the first dc-battery and the second dc-battery are negative polarity output, described charging selects circuit to comprise charge switch S5 in parallel and the charge switch S7 that all connects charging circuit output, charge switch S5 connects the negative electrode of diode D5, the negative pole of anodic bonding the first dc-battery of diode D5 and one end of power switch S6, the another end of power switch S6 connects the negative electrode of diode D6, the input of anodic bonding linear voltage Circuit tuning of diode D6 and the negative pole of electrochemical capacitor C3, the plus earth of electrochemical capacitor C3, the plus earth of the first dc-battery, charge switch S7 connects the negative electrode of diode D7, the negative pole of anodic bonding the second dc-battery of diode D7 and one end of power switch S8, the another end of power switch S8 connects the negative electrode of diode D8, the input of anodic bonding linear voltage Circuit tuning of diode D8 and the negative pole of electrochemical capacitor C3, the plus earth of the second dc-battery, described control circuit obtains charged state by the electric current at monitoring charge switch S5 and charge switch S7 place, and open and close and be chosen as the first dc-battery or the second dc-battery charges by controlling charge switch S5 and charge switch S7, electric current by monitoring power switch S6 and power switch S8 place obtains power supply state, and by controlling power switch S6 and power switch S8 keying is chosen as the first dc-battery or the second dc-battery is powered.
6. the DC power supply low ripple of battery continued power is realized circuit according to claim 4, it is characterized in that, described the first dc-battery and the second dc-battery are positive polarity battery, described control circuit comprises the voltage collection circuit that connects diode D1 anode, the voltage collection circuit that connects diode D2 anode, the voltage collection circuit that connects diode D3 anode, the voltage collection circuit that connects diode D4 anode, the voltage collection circuit that connects the first dc-battery positive pole, the current collection circuit that connects the first dc-battery negative pole, the voltage collection circuit that connects the second dc-battery positive pole, the current collection circuit that connects the second dc-battery negative pole, each Acquisition Circuit output connects respectively two 2 input NOR gate and four 3 input NOR gate, the output of four 3 input NOR gate is connecting valve S1 respectively, switch S 2, switch S 3, the control end of switch S 4.
7. the DC power supply low ripple of battery continued power is realized circuit according to claim 5, it is characterized in that, described the first dc-battery and the second dc-battery are negative polarity battery, described control circuit comprises the voltage collection circuit that connects diode D5 negative electrode, the voltage collection circuit that connects diode D6 negative electrode, the voltage collection circuit that connects diode D7 negative electrode, the voltage collection circuit that connects diode D8 negative electrode, the voltage collection circuit that connects the first dc-battery negative pole, the current collection circuit that connects the first dc-battery positive pole, the voltage collection circuit that connects the second dc-battery negative pole, the current collection circuit that connects the second dc-battery positive pole, each Acquisition Circuit output connects respectively two 2 input NOR gate and four 3 input NOR gate, the output of four 3 input NOR gate is connecting valve S5 respectively, switch S 6, switch S 7, the control end of switch S 8.
8. according to the DC power supply low ripple of battery continued power described in claim 3 or 4, realize circuit, it is characterized in that, described the first dc-battery and the second dc-battery are positive polarity output, linear voltage Circuit tuning comprises the LM78 series series voltage stabilizing chip that connects the output of power supply selection circuit, voltage stabilizing chip earth terminal ground connection, it is anodal that voltage stabilizing chip output connects electrochemical capacitor C2, electrochemical capacitor C2 minus earth.
9. according to the DC power supply low ripple of battery continued power described in claim 3 or 5, realize circuit, it is characterized in that, described the first dc-battery and the second dc-battery are negative polarity output, linear voltage Circuit tuning comprises the LM79 series series voltage stabilizing chip that connects the output of power supply selection circuit, voltage stabilizing chip earth terminal ground connection, voltage stabilizing chip output connects electrochemical capacitor C4 negative pole, electrochemical capacitor C4 plus earth.
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| CN109061248A (en) * | 2018-06-13 | 2018-12-21 | 西安石油大学 | It is a kind of can Spline smoothing DC test power supply implementation method and circuit |
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| CN112087045A (en) * | 2020-09-10 | 2020-12-15 | 陕西疆晨信息科技有限公司 | Iron tower power supply method based on differential standby power equipment |
| CN114089021A (en) * | 2021-11-11 | 2022-02-25 | 福建星云电子股份有限公司 | High-precision micro-current sampling device and method |
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