CN101499675B - Charging circuit and power supply system - Google Patents
Charging circuit and power supply system Download PDFInfo
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- CN101499675B CN101499675B CN2008100092578A CN200810009257A CN101499675B CN 101499675 B CN101499675 B CN 101499675B CN 2008100092578 A CN2008100092578 A CN 2008100092578A CN 200810009257 A CN200810009257 A CN 200810009257A CN 101499675 B CN101499675 B CN 101499675B
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Abstract
The invention is a charging circuit and power supply system, wherein the charging circuit at least includes: the main power supply circuit comprises at least one first switch element, is connected to the power supply, and is used for receiving the input voltage of the power supply and converting the input voltage into a first voltage; the direct current-direct current conversion circuit is connected with the main power supply circuit and used for receiving a first voltage and generating a second voltage to charge the energy storage element; the detection circuit is connected with the main power supply circuit and the output of the direct current-direct current conversion circuit, is used for detecting the voltage of the energy storage element and the first voltage output by the main power supply circuit and generates a feedback signal; and the controller is connected with the detection circuit and the first switch element of the main power supply circuit and used for controlling the first switch element of the main power supply circuit to operate according to the feedback signal so as to adjust the first voltage along with the second voltage. The charging circuit has higher operation efficiency.
Description
Technical field
The present invention relates to a kind of charging circuit and power system, relate in particular to a kind of high efficiency charging circuit and power system.
Background technology
In recent years; Along with the miniaturization of electronic product volume, make that relatively more and more how dissimilar electronic products also becomes the portable type electronic product that can carry, these portable type electronic products miscellaneous provide electric weight by battery; To keep the normal operation of portable type electronic product; Therefore, when the battery charge capacity is not enough, must charge to battery.
See also Fig. 1, it is the sketch map of traditional charging circuit.As shown in Figure 1, traditional charging circuit 1 comprises AC-DC change-over circuit 11, DC-to-dc change-over circuit 12 and filter capacitor C
Bus, wherein, AC-DC change-over circuit 11 and DC-to-dc change-over circuit 12 and filter capacitor C
BusConnect, in order to input voltage V interchange
InConvert direct voltage into, again through filter capacitor C
BusThe noise that filtering is unnecessary, and the output of DC-to-dc change-over circuit 12 is connected with battery, in order to the first voltage V with 11 outputs of AC-DC change-over circuit
BusConvert battery 13 acceptable voltages into and to battery 13 charging.
In addition, the AC-DC change-over circuit 11 of traditional charging circuit 1 can be with the second voltage V of its output
BusBe constant at a fixed value, and convert the battery 13 acceptables second voltage V into through DC-to-dc change-over circuit 12
b, the voltage V of battery 13 just
b, therefore, DC-to-dc change-over circuit 12 can change the second voltage V according to the electric weight of battery 13
bMagnitude of voltage.Wherein, the first voltage V of AC-DC change-over circuit 11 outputs
BusWith the second voltage V
bBetween relational expression be V
b=V
Bus* D * N, wherein D is a duty ratio, N is a turn ratio.Because V in the relational expression
BusWith N be fixed value, so can only make the second voltage V through changing duty ratio D
bChange.When the charge capacity of battery 13 hour, the voltage of battery 13 also can be minimum, this moment the second voltage V
bAnd duty ratio D also can be a minimum value.When the charge capacity of battery 13 was maximum, the voltage of battery 13 also can be maximum, at this moment the second voltage V
bAnd duty ratio D also can be maximum.
Yet; The operational efficiency of DC-to-dc change-over circuit 12 but is to change along with duty ratio D; When DC-to-dc change-over circuit 12 operates in bigger duty ratio D numerical value, higher running efficiency is arranged relatively, otherwise; When DC-to-dc change-over circuit 12 operates in less duty ratio D numerical value, lower operational efficiency is arranged relatively.Therefore, the operational efficiency of DC-to-dc change-over circuit 12 can change along with the charge capacity difference of battery 13.Hence one can see that, and when the operational efficiency of traditional charging circuit 1 was hanged down charge capacity at battery 13, operational efficiency was lower, and when battery 13 high charge capacities, operational efficiency is higher, and generally speaking, the operational efficiency of traditional charging circuit 1 is not good.
Therefore, how to develop a kind of high efficiency charging circuit that improves above-mentioned known technology disappearance, real problem for those skilled in the art's solution that presses at present.
Summary of the invention
Main purpose of the present invention is to provide a kind of high efficiency charging circuit; Its operational efficiency can not change along with the charge capacity difference of battery; And then reach relative higher running efficiency; Operational efficiency to solve traditional charging circuit can change along with the charge capacity difference of battery, causes the not good problem of operational efficiency of traditional charging circuit.
For achieving the above object; The preferred embodiments of the invention are for providing a kind of charging circuit, and in order to energy-storage travelling wave tube is charged, this charging circuit comprises at least: main power circuit; Comprise at least one first switch element; And be connected in power supply,, and convert first voltage in order to the input voltage of reception power supply; The DC-to-dc change-over circuit has duty ratio, is connected in main power circuit, in order to receive first voltage and to produce second voltage so that energy-storage travelling wave tube is charged; Testing circuit is connected in the output of main power circuit and DC-to-dc change-over circuit, in order to the voltage that detects energy-storage travelling wave tube first voltage with main power circuit output, and the generation feedback signal, this feedback signal is a feedback voltage signal; And controller; Be connected in first switch element of testing circuit and main power circuit; In order to controlling first switch element operation of main power circuit according to feedback signal, so that first voltage adjusts along with second voltage swing, and this first voltage and this second voltage are proportional relation; Wherein, Has the feedback proportional value between this feedback voltage signal and this first voltage; This feedback proportional value is along with this second voltage swing changes; And this controller is correspondingly adjusted according to this first voltage of this main power circuit output of change control of this feedback proportional value, so that the duty ratio of this DC-to-dc change-over circuit maintains fixed value.
Aforesaid charging circuit also comprises filter capacitor, is connected in this main power circuit and this DC-to-dc change-over circuit, in order to filtering noise.
Aforesaid charging circuit also comprises feedback capacity, is connected in this testing circuit and this controller.
Aforesaid charging circuit, wherein this controller is a Pwm controller.
Aforesaid charging circuit, wherein this testing circuit also comprises digital signal processor, in order to calculate this second voltage corresponding feedback proportional value when difference is big or small.
Aforesaid charging circuit, wherein this feedback proportional value is reached through the electric resistance partial pressure mode.
Aforesaid charging circuit, wherein this controller comprises comparator, and being used for this feedback signal and reference signal relatively, this reference signal is a reference voltage signal.
Aforesaid charging circuit, wherein this input voltage is alternating current or direct current.
Aforesaid charging circuit, wherein this first switch element be selected from crowd family that bipolar junction transistor, junction field effect transistor and mos field effect transistor form one of them.
Aforesaid charging circuit, wherein this main power circuit also comprises: bridge rectifier is connected with this power supply, in order to receive this input voltage and the rectification of this power supply; Input capacitance is connected in this bridge rectifier; Inductance is connected between this first switch element and this input capacitance; Diode is connected in this first switch element; And output capacitance, be connected in this diode.
For achieving the above object, another preferred embodiment of the present invention comprises for a kind of power system is provided at least: battery module, in order to store electrical energy; AC-DC converter is in order to first alternating voltage that receives power input and convert direct voltage into; Charging circuit, it is connected between power input and the battery module, or between AC-DC converter and the battery module, in order to this charging battery module; Inverter, it is connected in AC-DC converter, in order to direct voltage is converted into second alternating voltage; Bypass loop, it is connected in power input; Diverter switch, it is connected in bypass loop, inverter and power output end; And system controller, it is connected in power input, AC-DC converter, charging circuit and inverter, in order to the control power system, so that power system is normally moved.Wherein, charging circuit comprises at least: main power circuit, comprise at least the first switch element, and in order to the reception input voltage, and convert first voltage to; The DC-to-dc change-over circuit has duty ratio, is connected in main power circuit, in order to receive first voltage and to produce second voltage with to charging battery module; Testing circuit is connected in the output of main power circuit and DC-to-dc change-over circuit, in order to the voltage that detects battery module first voltage with main power circuit output, and the generation feedback signal, this feedback signal is a feedback voltage signal; And Pwm controller; Be connected in first switch element of testing circuit and main power circuit; In order to control first switch element operation of main power circuit according to feedback signal; So that first voltage adjusts along with second voltage swing, and this first voltage and this second voltage are proportional relation; Wherein, Has the feedback proportional value between this feedback voltage signal and this first voltage; This feedback proportional value is along with this second voltage swing changes; And this controller is correspondingly adjusted according to this first voltage of this main power circuit output of change control of this feedback proportional value, so that the duty ratio of this DC-to-dc change-over circuit maintains fixed value.
Aforesaid power system also comprises: booster circuit, it is connected in this battery module, this system controller and this inverter, is the required voltage of this inverter in order to the voltage transitions with this battery module.Charging circuit of the present invention has higher running efficiency.
Description of drawings
Fig. 1 is the sketch map of traditional charging circuit.
Fig. 2 is the circuit box sketch map of the high efficiency charging circuit of the preferred embodiment of the present invention.
Fig. 3 is the detailed structure sketch map of the high efficiency charging circuit of the preferred embodiment of the present invention.
Fig. 4 is the circuit diagram of the exemplary power system of the high efficiency charging circuit of use the present invention.
Wherein, description of reference numerals is following:
1: charging circuit 11: the AC-DC converting unit
12: DC-to-dc converting unit 13: battery
2: charging circuit 20: energy-storage travelling wave tube
21: main power circuit 211: bridge rectifier
22: DC-to-dc change-over circuit 23: testing circuit
231: optical coupler 24:PWM controller
241: comparator R
F1: first feedback resistance
R
F2: the second feedback resistance R
F3: the 3rd feedback resistance
R
1: first resistance R
2: second resistance
R
3: the 3rd resistance Q
1: first switch element
Q
2: second switch element C
1: first electric capacity
C
f: feedback capacity C
In: input capacitance
C
o: output capacitance C
Bus: filter capacitor
V
Ref: reference voltage signal V
f: feedback voltage signal
V
b: the second voltage V
In: input voltage
I
b: output current L: inductance
D: diode V
Bus: first voltage
41: AC-DC converter 41a: power input
41b: dc bus 42: battery module
43: booster circuit 44: inverter
45: system controller 46: diverter switch
46a: power output end 47: bypass loop
48: load
Embodiment
Some exemplary embodiments that embody characteristic of the present invention and advantage will be described in detail in the explanation of back segment.Be understood that the present invention can have various variations on different schemes, its neither departing from the scope of the present invention, and explanation wherein and accompanying drawing be used as the usefulness of explanation in itself, but not in order to restriction the present invention.
See also Fig. 2, it is the circuit box sketch map of the high efficiency charging circuit of the preferred embodiment of the present invention.As shown in Figure 2, the high efficiency charging circuit 2 of the present invention is in order to charge to energy-storage travelling wave tube 20, and wherein energy-storage travelling wave tube 20 can be but is not limited to battery.The high efficiency charging circuit 2 of the present invention comprises main power circuit 21, DC-to-dc change-over circuit 22, testing circuit 23 and pulse width modulation (Pulse Width Modulation; PWM) controller 24 (following will the abbreviation) with the PWM controller; Wherein main power circuit 21 is connected in power supply and DC-to-dc change-over circuit 22, in order to receive the input voltage V of this power supply
In, alternating voltage for example, and convert the first voltage V to
Bus, direct voltage for example.DC-to-dc change-over circuit 22 is connected in the output and the energy-storage travelling wave tube 20 of main power circuit 21, in order to the first voltage V with main power circuit 21 outputs
BusConvert the second voltage V that is fit to energy-storage travelling wave tube 20 chargings into
b, direct voltage for example, and this second voltage V
bThe voltage that is equal to energy-storage travelling wave tube 20 in fact is (following also with V
bRepresent the voltage of energy-storage travelling wave tube 20).Testing circuit 23 is connected in the output of main power circuit 21 and the output of DC-to-dc change-over circuit 22, in order to detect the first voltage V of main power circuit 21 outputs simultaneously
BusAnd the voltage V of energy-storage travelling wave tube 20
b, and produce feedback voltage signal V
fPWM controller 24 is connected in testing circuit 23 and main power circuit 21, in order to according to feedback voltage signal V
fThe first voltage V of magnitude of voltage control main power circuit 21 outputs
BusMagnitude of voltage according to the second voltage V
bMagnitude of voltage size and adjust.
In the present embodiment, the high efficiency charging circuit 2 of the present invention also can comprise filter capacitor C
BusAnd feedback capacity C
f, wherein, filter capacitor C
BusBe connected in the output of main power circuit 21, in order to the unnecessary noise of filtering, and feedback capacity C
fThe output of connection detection circuit 23 is used for filtering feedback voltage signal V
fIn unnecessary noise.
In this embodiment, because the second voltage V of the high efficiency charging circuit 2 of the present invention
bCan increase along with the charge capacity of energy-storage travelling wave tube 20 and increase, therefore, DC-to-dc change-over circuit 22 receives the first voltage V of main power circuit 21
BusThe time, can adjust the second voltage V in good time
bMagnitude of voltage, the relational expression between them is V
b=V
Bus* D * N, wherein D is a duty ratio, N is a turn ratio.Yet, the first voltage V that DC-to-dc change-over circuit 22 is received
BusCan be according to the voltage V of energy-storage travelling wave tube 20
bAnd change, so can make DC-to-dc change-over circuit 22 operate in the numerical value of relative higher duty cycle D, and then relative higher running efficiency is arranged.
In this embodiment, the first voltage V of main power circuit 21 outputs
BusBy 24 controls of PWM controller, for guaranteeing the first voltage V of main power circuit 21 outputs
BusValue can make DC-to-dc change-over circuit 22 at the duty ratio D operation of high value relatively, the feedback voltage signal V that testing circuit 23 is produced
fThe first voltage V that is received according to DC-to-dc change-over circuit 22 simultaneously
BusAnd the voltage V of energy-storage travelling wave tube 20
bAnd change.
See also Fig. 3, it is the detailed structure sketch map of the high efficiency charging circuit of the preferred embodiment of the present invention.As shown in Figure 3, main power circuit 21 comprises the first switch element Q
1, this first switch element Q1 is connected with PWM controller 24, and by PWM controller 24 according to feedback voltage signal V
fThe first switch element Q of magnitude of voltage control main power circuit 21
1Whether conducting.Wherein, this first switch element Q
1Can be but be not limited to bipolar junction transistor (BJT), junction field effect transistor (JFET) or mos field effect transistor transistors such as (MOSFET).
In certain embodiments, main power circuit 21 also comprises but is not limited to bridge rectifier 211, input capacitance C
In, inductance L, diode D and output capacitance C
oWherein, bridge rectifier 211 is connected in power supply, and the output of bridge rectifier 211 and input capacitance C
InAnd the inductance L connection, in order to receive input voltage V
In, for example alternating voltage, and rectification is a direct voltage, again through input capacitance C
InThe ripple of eliminating in the direct voltage (ripple) changes.The first switch element Q
1Be connected with positive pole, inductance L and the PWM controller 24 of diode D, and receive 24 controls of PWM controller.The output of the negative pole of diode D and main power circuit 21 and output capacitance C
oConnect.When PWM controller 24 transmits enable signals (enable) for example during high potential signal, the first switch element Q
1Conducting makes the inductance L store electrical energy, when PWM controller 24 transmits disable signal (disable) for example during low-potential signal, the first switch element Q
1Be sent to the input of DC-to-dc change-over circuit 22 by the electric energy that makes inductance L via diode D, at this moment, the first voltage V of main power circuit 21 outputs
BusValue is equivalent to the magnitude of voltage and the input voltage V of inductance L in fact
InThe magnitude of voltage addition, make main power circuit 21 have the ability of boosting.In other words, use the PWM controller 24 controls first switch element Q
1Conducting and deadline are to obtain the first suitable voltage V
BusMagnitude of voltage.
In the present embodiment, testing circuit 23 comprises but is not limited to the first feedback resistance R
F1, the second feedback resistance R
F2, the 3rd feedback resistance R
F3, optical coupler 231 (Photo Coupler), first resistance R
1, second resistance R
2, the 3rd resistance R
3, second switch element Q
2, first capacitor C
1And digital signal processor 232 (Digital Signal Processor, DSP).Wherein, the first feedback resistance R
F1, the second feedback resistance R
F2With the 3rd feedback resistance R
F3Outside being connected in series each other, the first feedback resistance R
F1An end be connected and the first feedback resistance R with the output of main power circuit 21
F1The other end then be connected in the second feedback resistance R
F2And the output of testing circuit 23.The output of optical coupler 231 and the 3rd feedback resistance R
F3Be connected in parallel, the input of optical coupler 231 then with second switch circuit Q
2Collector electrode and emitter terminal connect.First resistance R
1With DC driven power supply V
Cc, for example 12V, and second switch element Q
2Collector electrode connect.Second resistance R
2And first capacitor C
1Be connected in second switch element Q
2Base stage and emitter between.The 3rd resistance R
3Be connected in second switch element Q
2Base stage and digital signal processor 232.The output and the 3rd resistance R of digital signal processor 232 and DC-to-dc change-over circuit 22
3Connect.
In the present embodiment, the explanation of the operational mode of testing circuit 23 as follows.For DC-to-dc change-over circuit 22 is moved under the duty ratio D of high numerical value, testing circuit 23 is understood the first voltage V that is received according to DC-to-dc change-over circuit 22
BusAnd the voltage V of energy-storage travelling wave tube 20
bAnd the feedback proportional value k of change testing circuit 23.When energy-storage travelling wave tube 20 during for low charge capacity, the voltage V of energy-storage travelling wave tube 20
bBe low voltage value relatively, by relational expression V
b=V
Bus* D * N can know that DC-to-dc change-over circuit 22 needs the first less voltage V
BusValue just can make DC-to-dc change-over circuit 22 under the duty ratio D of high numerical value, move; In other words; If make DC-to-dc change-over circuit 22 for example maintain the duty ratio D of higher and fixed value, can be through turning down the first voltage V that DC-to-dc change-over circuit 22 is received
BusSizes values is to reach the second lower voltage V
bValue.When energy-storage travelling wave tube 20 is high charge capacity, the voltage V of energy-storage travelling wave tube 20
bBe high-voltage value relatively, by relational expression V
b=V
Bus* D * N can know, if make DC-to-dc change-over circuit 22 for example maintain the duty ratio D of higher and fixed value, and can be through heightening the first voltage V that DC-to-dc change-over circuit 22 is received
BusSizes values is to reach the second higher voltage V
bValue, in other words, DC-to-dc change-over circuit 22 needs to receive the first higher voltage V
BusValue just can make DC-to-dc change-over circuit 22 under the duty ratio D of high numerical value, move.Certainly, the voltage V of energy-storage travelling wave tube 20
bWhen high potential and electronegative potential; DC-to-dc change-over circuit 22 does not limit and will under the duty ratio D of identical numerical value, move; Can be according to the characteristic operation under the higher duty cycle D of different numerical value respectively of DC-to-dc change-over circuit 22 and energy-storage travelling wave tube 20, so that the traditional relatively charging circuit of DC-to-dc change-over circuit 22 has preferred operational efficiency.
Therefore, in the present embodiment, as the voltage V of energy-storage travelling wave tube 20
bDuring for low voltage value, digital signal processor 232 can detect the voltage V of energy-storage travelling wave tube 20
bBe low voltage value, and control second switch element Q
2End, make optical coupler 231 operation and cause the 3rd feedback resistance R
F3By bypass (bypass), obtain R
F2/ (R
F1+ R
F2) low feedback proportional value k.Voltage V when energy-storage travelling wave tube 20
bDuring for high-voltage value, digital signal processor 232 can detect the voltage V of energy-storage travelling wave tube 20
bBe high-voltage value, and control second switch element Q
2Conducting makes optical coupler 231 out of service and cause the 3rd feedback resistance R
F3Stop to be obtained (R by bypass
F2+ R
F3)/(R
F1+ R
F2+ R
F3) high feedback proportional value k.
For example, when being in respectively, energy-storage travelling wave tube 20 hangs down charge capacity and high charge capacity, for example the voltage V of energy-storage travelling wave tube 20
bBe respectively 0.9V and 1.4V, and turn ratio N is 0.005, when duty ratio D numerical value desires to maintain 0.9 left and right sides, the first voltage V that DC-to-dc change-over circuit 22 is received
BusMust the corresponding respectively 200V of being adjusted into and 311V about duty ratio D numerical value is maintained about 0.9, so can make charging circuit 2 keep higher running efficiency.
In the present embodiment, PWM controller 24 can receive feedback voltage signal V
f, and utilize inner comparator 241 and reference voltage signal V
RefCompare, and then the first switch element Q of control main power circuit 21
1Operation makes feedback voltage signal V
fWith reference voltage signal V
RefIdentical in fact, by relational expression V
f=k * V
BusCan know, through changing the first voltage V that feedback proportional value k can change main power circuit 21 outputs
BusValue.Therefore, testing circuit 23 can be according to the voltage V of energy-storage travelling wave tube 20
bChange feedback proportional value k, the first voltage V that DC converting circuit 22 is received
BusCan be according to the voltage V of energy-storage travelling wave tube 20
bChange and change, and then DC-to-dc change-over circuit 22 is moved under high efficiency situation always.In the present embodiment, at the voltage V of energy-storage travelling wave tube 20
bDuring for low voltage value, feedback proportional value k can be R
F2/ (R
F1+ R
F2) low numerical value, at the voltage V of energy-storage travelling wave tube 20
bDuring for high-voltage value, feedback proportional value k can be (R
F2+ R
F3)/(R
F1+ R
F2+ R
F3) high numerical value.
Certainly, testing circuit 23 can also utilize the mode of calculating or table look-up (lookup table) to make feedback proportional value k that more variation arranged, and DC-to-dc change-over circuit 22 is kept operated in fixing duty ratio D numerical value, and then keep higher running efficiency.For example, use analogue-to-digital converters (A/D converter) to obtain the voltage V of energy-storage travelling wave tube 20 respectively
bAnd the first voltage V of main power circuit 21 outputs
BusNumerical value; Utilize digital signal processor 232 to obtain feedback proportional value k again with the mode of calculating or table look-up; Wherein, This feedback proportional value k can make DC-to-dc change-over circuit 22 keep and operate in fixing and higher duty ratio D numerical value, then, uses digital-analog convertor (D/A converter) to produce relative feedback voltage signal V
fValue.
See also Fig. 4, it is the circuit diagram of the exemplary power system of the high efficiency charging circuit of use the present invention.As shown in Figure 4; The power system 4 of using the high efficiency charging circuit of the present invention can be but is not limited to non-interrupted power supply system, and this power system 4 comprises: the high efficiency charging circuit of AC-DC converter 41, the present invention 2, battery module 42, booster circuit 43, inverter 44, system controller 45, diverter switch 46, power input 41a, dc bus 41b (DC bus), power output end 46a and bypass loop 47.The function, annexation of using power system 4 each element of the high efficiency charging circuit of the present invention with and the control method explanation as follows.
In this embodiment, power input 41a is used to receive input voltage V
In, that is first alternating voltage.AC-DC converter 41 is connected between power input 41a and the dc bus 41b, in order to the input voltage V with power input 41a
InConvert direct current into predetermined voltage level.The high efficiency charging circuit 2 of the present invention is connected between power input 41a and the battery module 42, in order to input voltage V
InConvert battery module 42 acceptable voltages into, so that battery module 42 is charged.Booster circuit 43 can be the DC-to-dc change-over circuit, and is connected between battery module 42 and the dc bus 41b, is the direct voltage that inverter 44 needs in order to the voltage transitions with battery module 42.Inverter 44 is connected between dc bus 41b and the diverter switch 46, and its direct voltage with dc bus 41b converts standard and stable output voltage V into
1, that is second alternating voltage.Diverter switch 46 is connected in bypass loop 47, inverter 44 and power output end 46a; Can be by for example thyristor (Silicon-Controlled Rectifier; SCR), three terminal bidirectional alternating-current switch (The triode AC SWitch; TRIAC), igbt (Insulated Gate Bipolar Transistor; IGBT), metal oxide semiconductor transistor (Metal Oxide Semiconductor Field Effect Transistor, MOSFET) or relay form.Bypass loop 47 is connected between diverter switch 46 and the power input 41a; And system controller 45 is connected in the high efficiency charging circuit of power input 41a, AC-DC converter 41, the present invention 2, booster circuit 43 and inverter 44, in order to the operation of control power system 4.
As input voltage V
InJust often, system controller 45 can be controlled AC-DC converter 41 with input voltage V
InAlternating voltage convert direct current into a predetermined voltage level, and this direct current is offered inverter 44.At this moment, system controller 45 can convert this direct current into standard and stable AC electricity by control inverter 44, again through the output voltage V of diverter switch 46 with inverter 44
1 Offer load 48 and use (this moment load voltage V
OutAlso be the output voltage V of inverter 44
1), the high efficiency charging circuit 2 of the present invention simultaneously can be with input voltage V
InConvert battery module 42 acceptable voltages into, so that battery module 42 is charged.
As input voltage V
InTake place for example to interrupt unusually or problems such as undertension are when causing the electricity consumption quality defective; System controller 45 meeting control booster circuits 43 are the direct voltage that inverter 44 needs with the voltage transitions of battery module 42; Convert alternating current into by inverter 44 again, and use for load 48 through diverter switch 46 power supplies.This moment, load 48 employed electric energy were to be provided by battery module 42, and wherein battery module 42 can be that a plurality of batteries are formed, and number of battery cells is how can supplying time just more of a specified duration more.
Because this power system 4 is used the high efficiency charging circuit 2 of the present invention, at input voltage V
InJust often, the high efficiency charging circuit 2 of the present invention can be with input voltage V
InConvert battery module 42 acceptable voltages into, with to battery module 42 charging, and the circuit operational efficiency is high, therefore, uses the power system 4 of the high efficiency charging circuit 2 of the present invention to have higher running efficiency relatively.In this embodiment, the high efficiency charging circuit 2 of the present invention can be connected between dc bus 41b and the battery module 42.
In addition; The high efficiency charging circuit 2 of the present invention is except being used for to the battery charge; Can also be used in the power supply unit of revocable output voltage separately; For example the power supply unit of the employed adjustable output voltage value of electronic leaning laboratory is given the various load of using different voltages with power supply, makes the power supply unit of adjustable output voltage value have higher running efficiency relatively.
In sum, the high efficiency charging circuit of the present invention is with the first voltage V of main power circuit 21 outputs
BusVoltage V according to energy-storage travelling wave tube 20
bNo matter adjustment is the voltage V of feasible energy-storage travelling wave tube 20
bThe output voltage of the high efficiency charging circuit of the present invention just; Be under the situation of high voltage or low-voltage; The duty ratio of DC-to-dc converter 22 can maintain higher value, so that charging circuit 2 can continue to maintain relative higher running efficiency, solving traditional charging circuit can be because of the voltage V of energy-storage travelling wave tube
bHeight changes and causes the not good problem of operational efficiency.In addition, the high efficiency charging circuit 2 of the present invention can also be used in the power supply unit of adjustable output voltage value separately except being used for to the battery charge, can make the power supply unit of adjustable output voltage value have higher running efficiency equally.
The present invention can make various modifications by those skilled in the art, but its neither disengaging appended claims scope required for protection.
Claims (12)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100092578A CN101499675B (en) | 2008-01-31 | 2008-01-31 | Charging circuit and power supply system |
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|---|---|---|---|
| CN2008100092578A CN101499675B (en) | 2008-01-31 | 2008-01-31 | Charging circuit and power supply system |
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| CN101499675B true CN101499675B (en) | 2012-07-04 |
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| CN101986503A (en) * | 2010-09-27 | 2011-03-16 | 田明 | Solar energy wind energy charging circuit with high use ratio and low power consumption |
| US10153701B2 (en) * | 2011-03-03 | 2018-12-11 | Telefonaktiebolaget Lm Ericsson (Publ) | Controlling a switched mode power supply with maximised power efficiency |
| CN102738880A (en) * | 2011-04-12 | 2012-10-17 | 台达电子工业股份有限公司 | Charging device of mobile carrier |
| CN102263306B (en) * | 2011-06-16 | 2013-12-25 | 上海雷博新能源汽车技术有限公司 | Charging method, charging module and charger with automatically adjustable single efficiency |
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