CN102468760A - Power supply device, control method thereof and power supply system using power supply device - Google Patents
Power supply device, control method thereof and power supply system using power supply device Download PDFInfo
- Publication number
- CN102468760A CN102468760A CN2010105383204A CN201010538320A CN102468760A CN 102468760 A CN102468760 A CN 102468760A CN 2010105383204 A CN2010105383204 A CN 2010105383204A CN 201010538320 A CN201010538320 A CN 201010538320A CN 102468760 A CN102468760 A CN 102468760A
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- power supply
- voltage
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a power supply device, a control method of the power supply device, and a power supply system using the power supply device, wherein the power supply device comprises a power converter used for converting input voltage into internal output voltage, an output protective circuit which is electrically connected between an output end of the power converter and an output end of the power supply device and is used for protecting the power supply device for normal work by the connecting or disconnecting action, and a control unit which is electrically connected with the output protective circuit and is used for controlling the work of the output protective circuit, wherein when the working frequency of the power supply device is more than the first default frequency value and the value of the internal output voltage is more than the first default voltage value, the control unit can be used for controlling the output protective circuit to be stopped by outputting a first control signal to a control end of the output protective circuit. Through the invention, the power supply devices which work normally can be prevented from being burnt out by reverse current or overhigh working frequency caused by one faulted power supply device.
Description
Technical field
The present invention relates to the control method and the electric supply system of a kind of power supply unit and power supply unit; Especially refer to a kind of high-reliability and be applicable to the power supply unit of redundant formula electric supply system and the control method of power supply unit, and this electric supply system uses the work of a plurality of power supply unit parallel operation.
Background technology
In recent years along with the progress of science and technology; Electronic product with difference in functionality of all kinds is developed out gradually; These electronic products with difference in functionality of all kinds have not only satisfied people's various different demands, more incorporate everyone daily life, and it is more convenient to make people live.
The electronic product of these difference in functionalitys of all kinds is made up of various electronic component; And the required supply voltage of each electronic component is not quite similar; Therefore, the AC power (civil power) that provides of now power supply system and be not suitable for directly offering electronic product and use.In order to provide suitable voltage to make its operate as normal to each electronic component, these electronic products need be through power-switching circuit with AC power, and for example general civil power converts suitable voltage into and uses to electronic product.Along with the power consumption of electronic product is different with the occasion of application; For reliability (reliability) that improves power supply and the job requirement that reaches fault tolerant type; The electric supply system of redundant formula (redundancy power system) can use a plurality of power supply units while parallel operations to electronic product; Cause electric supply system to stop power supply and electronic product is quit work because of one of them power supply unit fault or damage preventing to electronic product.
See also Fig. 1, it is the circuit framework sketch map of known electric supply system.As shown in Figure 1, known electric supply system 1 comprise structural similarity and rated output voltage value identical more than a power supply unit 10, the output through a plurality of power supply units 10 electrically is connected in parallel and constitutes the electric supply system 1 that is equipped with slow formula.When work; The output voltage V o ' of required voltage value when each power supply unit 10 can convert input voltage vin into electronic product (not indicating among the figure) work; 12V (volt) for example; And each power supply unit 10 is shared (Current sharing) jointly to be provided to the output current Io ' of system of electronic product (not indicating among the figure), and promptly system's output current Io ' equals the sum total of output current the Io1 '～Ion ' of all power supply units 10.
As shown in Figure 1; Known each power supply unit 10 comprises supply convertor 101 (converter) and output protection circuit 102; Behind the output voltage V o1 ', the electric energy of interior output voltage V o1 ' was sent to electronic product (indicating among the figure) via output protection circuit 102 again in power supply unit 10 converted input voltage vin into through an inner switching circuit (among the figure indicate) conducting or the change action (switching) that ends.In present embodiment; Output protection circuit 102 by a plurality of diode D (diode) parallel connection constitute have buffering and a protective feature or gate diode (ORing Diode); Each diode D is electrically connected between the output of output and power supply unit 10 of supply convertor 101, in order to the flow through sense of current of output current Io1 ' of output protection circuit 102 of restriction.When one of them power supply unit 10 short circuit or fault; The diode D of output protection circuit 102 can prevent that power supply unit 10 from backward current (reverse current) taking place, and prevents that promptly the output current Io1 ' reverse flow of power supply unit 10 is back in the power supply unit 10.For example during one of them power supply unit 10 short circuit; Output protection circuit 102 can prevent effectively that backward current from flowing into the power supply unit 10 that breaks down; One of them power supply unit 10 breaks down and causes output voltage to raise for another example, and output protection circuit 102 can prevent effectively that backward current from flowing into the power supply unit 10 that does not break down.Though; The output protection circuit 102 that utilizes diode D to form can prevent effectively that backward current from taking place; But diode D has bigger conducting voltage to fall; Therefore the conducting of diode D loss (conduction loss) is bigger, and power supply unit 10 is lower with the whole efficiency of electric supply system 1, and working temperature is higher.
Please with reference to Fig. 2 and cooperate Fig. 1, wherein Fig. 2 is the structural representation of another kind of known electric supply system.As shown in Figure 2; The power supply unit 20 of known electric supply system 2 utilizes a plurality of power transistor M (power transistor) to replace a plurality of diode D in shown in Figure 1, have buffering and a protective feature with formation or door field-effect transistor (Oring FET) output protection circuit 102.Less characteristic is fallen because power transistor M has the lower and conducting voltage of conduction impedance; Therefore pass through the output protection circuit 102 that a plurality of power transistor M constitute, power supply unit 20 and power loss minimizing, the working temperature of electric supply system 2 are reduced and the whole efficiency increase.In present embodiment; Control circuit 203 is according to output voltage V o ' and interior both voltage differences of output voltage V o1 '; Be that Vt (Vt=Vo '-Vo1 ') falls in conducting voltage, control a plurality of power transistor M conducting or end, when backward currents take place power supply unit 20; The magnitude of voltage that control circuit 203 meetings are fallen Vt through conducting voltage is judged power supply unit 20 generation backward currents, and a plurality of power transistor M of corresponding control end.
Please with reference to Fig. 3 and cooperate Fig. 2, wherein Fig. 3 is the state of power transistor and the corresponding relation sketch map that conducting voltage is fallen.Corresponding relation tool lagging characteristics (hysteresis) as shown in Figure 3, that the state of power transistor and conducting voltage are fallen, its working method is explained as follows:
(1) (Vt＞Vref2), backward currents take place to the magnitude of voltage that falls Vt when conducting voltage in expression power supply unit 10, and control circuit 203 can end by a plurality of power transistor M of corresponding control during greater than the second default voltage value Vref2;
(2) magnitude of voltage that falls Vt when conducting voltage is during less than the first default voltage value Vref1, and (Vt＞Vref1), backward current does not take place in expression power supply unit 10, and control circuit 203 can a plurality of power transistor M of corresponding control conducting;
(3) when conducting voltage is fallen between the stagnant regions of magnitude of voltage between between the first default voltage value Vref1 and the second default voltage value Vref2 of Vt, control circuit 203 can keep laststates by a plurality of power transistor M of corresponding control;
In present embodiment; Supply convertor 101 like power supply unit 20 is the supply convertor of a resonant mode; When one of them power supply unit 20 fault, the power supply unit 20 of fault can make the magnitude of voltage of output voltage V o ' rise and surpass load voltage value, for example surpasses 12V; And the magnitude of voltage of the interior output voltage V o1 ' of the corresponding power supply unit 20 that makes operate as normal rises; At this moment, the supply convertor 101 of the power supply unit 20 of operate as normal drops to load voltage value for the magnitude of voltage that makes output voltage V o ', for example 12V; The operating frequency of the switching circuit of the supply convertor 101 of the power supply unit 20 of operate as normal (not indicating among the figure) can increase, and after operating frequency arrives to a certain degree, can cause the supply convertor 101 of the power supply unit 20 of operate as normal to burn.
Therefore, control method how to develop a kind of power supply unit that improves above-mentioned known technology defective and power supply unit with and the electric supply system that is suitable for real in pressing for the problem of solution at present.
Summary of the invention
The control method that the object of the present invention is to provide a kind of power supply unit and power supply unit with and the electric supply system that is suitable for; Make power supply unit generation backward current or the operating frequency of operate as normal can be too high and burn with the power supply unit that prevents failover, have higher whole efficiency, less power loss and lower working temperature simultaneously.
For reaching above-mentioned purpose, of the present invention one than the broad sense execution mode for a kind of power supply unit is provided, in order to the electric energy that receives input voltage and produce output voltage, comprise: supply convertor, in order to input voltage is converted into interior output voltage; Output protection circuit is electrically connected between the output of output and power supply unit of supply convertor, in order to protect power supply unit to make its operate as normal through conducting or the action that ends; And control unit, be electrically connected at output protection circuit, in order to the work of control output protection circuit; Wherein, When the operating frequency of supply convertor greater than the magnitude of voltage of the first default frequency value and interior output voltage during greater than the first default voltage value, control unit through export first control signal to output protection circuit control end end with the control output protection circuit.
For reaching above-mentioned purpose; Of the present invention another than the broad sense execution mode for a kind of electric supply system is provided; Produce output voltage and system's output current in order to the electric energy that receives input voltage, comprise: a plurality of power supply units are connected in parallel with each other; And wherein at least one power supply unit comprises: supply convertor, in order to input voltage is converted into interior output voltage; Output protection circuit is electrically connected between the output of output and power supply unit of supply convertor, in order to protect power supply unit to make its operate as normal through conducting or the work that ends; And control unit, be electrically connected at output protection circuit, in order to the work of control output protection circuit; Wherein, When the operating frequency of supply convertor greater than the magnitude of voltage of the first default frequency value and interior output voltage during greater than the first default voltage value, control unit through export first control signal to output protection circuit control end end with the control output protection circuit.
For reaching above-mentioned purpose, of the present invention another be the control method that a kind of power supply unit is provided than the broad sense execution mode, comprise step: supply convertor is provided, in order to input voltage is converted into interior output voltage; Output protection circuit is provided, is electrically connected between the output of output and power supply unit of supply convertor, in order to protect power supply unit to make its operate as normal through conducting or the action that ends; Output voltage in detecting; Detect the operating frequency of supply convertor; The magnitude of voltage and the first default voltage value of output voltage relatively; The frequency values and the first default frequency value that compare operating frequency; And when the frequency values of the operating frequency of supply convertor greater than the magnitude of voltage of the first default frequency value and interior output voltage during greater than the first default voltage value, the control output protection circuit ends.
Beneficial effect of the present invention is; The control method of power supply unit provided by the present invention and power supply unit with and the electric supply system that is suitable for; The power supply unit that can prevent failover makes power supply unit generation backward current or the operating frequency of operate as normal can be too high and burn, and has higher whole efficiency, less power loss and lower working temperature simultaneously.
Description of drawings
Fig. 1: be the circuit framework sketch map of known electric supply system.
Fig. 2: be the structural representation of the known electric supply system of another kind.
Fig. 3: the corresponding relation sketch map that falls for the state and the conducting voltage of power transistor.
Fig. 4 A: be the circuit block diagram of the electric supply system of preferred embodiment of the present invention.
Fig. 4 B: be the DC current gain of the supply convertor of preferred embodiment of the present invention and the corresponding relation sketch map of operating frequency.
Fig. 5: be the circuit diagram of the power supply unit of preferred embodiment of the present invention.
Fig. 6: be the circuit diagram of the first control circuit of preferred embodiment of the present invention.
Fig. 7: be the circuit diagram of the power supply unit of another preferred embodiment of the present invention.
Fig. 8: be the control method sketch map of the power supply unit of preferred embodiment of the present invention.
Wherein, description of reference numerals is following:
1,2: electric supply system 10,20: power supply unit
101: supply convertor 102: output protection circuit
203: control circuit Vin: input voltage
Vo ': the output voltage Io ' of system: system's output current
Vo1 ': interior output voltage
Io1 '～Ion ': the output current of power supply unit
D: diode M: power transistor
Vt: Vs falls in conducting voltage: first control signal
OUTA: the second control signal OUTB: the 3rd control signal
Vo: output voltage V o1: interior output voltage
Io: system's output current
Io1～Ion: the output current of power supply unit
Fs: operating frequency fo: rated frequency
Veaout: error amplification signal Vk: count signal
Vp1: the first comparison signal Vp2: second comparison signal
Vref1: the first default voltage value
Vref2: the second default voltage value
V1～V2: the first～the second voltage vcc: boost voltage
3: electric supply system 4: power supply unit
40: supply convertor 400: switching circuit
401: resonant circuit 402: output rectification circuit
41: output protection circuit 41a: switch element
42: control unit 421: first control circuit
4212: the second comparison circuits of 4211: the first comparison circuits
4213: AND 4214: drive circuit
422: second control circuit 4221: feedback circuit
4222: synchronous commutating control circuit 4223: error amplifying circuit
4224: bleeder circuit 4225: frequency detection circuit
IC604: controller
R649: first resistance R 650; Second resistance
R651: 652: the four resistance of the 3rd resistance R
R643: 644: the six resistance of the 5th resistance R
R646: 647: the eight resistance of the 7th resistance R
R645: 603: the ten resistance of the 9th resistance R
Rp: the 11 resistance D605: first diode
D608: the second diode D168: the 3rd diode
OP1: the first operational amplifier OP2: second operational amplifier
K1: series connection end
Q1～Q4: first～the 4th switch element
Q5～Q6: the 5th～the 6th switch element
Q605: driving switch element Cin: input capacitance
Co: output capacitance
Lr: the first resonant inductance Cr: resonant capacitance
Lm: the second resonant inductance T: transformer
Np: primary side Ns: primary side
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 embodiment, its neither departing from the scope of the present invention, and explanation wherein and accompanying drawing be the usefulness of being used as explanation in itself, but not in order to restriction the present invention.
See also Fig. 4 A and cooperate Fig. 4 B, wherein Fig. 4 A is the circuit block diagram of the electric supply system of preferred embodiment of the present invention, and Fig. 4 B is the DC current gain of the supply convertor of preferred embodiment of the present invention and the corresponding relation sketch map of operating frequency.Shown in Fig. 4 A, electric supply system 3 of the present invention has a plurality of power supply unit 4 parallel connections provides output voltage V o to-load (indicating among the figure), to constitute the electric supply system of redundant formula.When work; The output voltage V o of required voltage value when each power supply unit 4 can convert input voltage vin into load (not indicating among the figure) work; 12V for example; And each power supply unit 4 is shared (Current sharing) jointly to be provided to the output current Io of system of load (not indicating among the figure), and promptly system's output current Io equals the sum total of the output current Io1～Ion of all power supply units 4.Wherein, the magnitude of voltage of interior output voltage V o1 is higher than the magnitude of voltage of output voltage V o, for example 12.1V a little.
At least one or each power supply unit 4 comprise: supply convertor 40, output protection circuit 41 and control unit 42; Wherein, The input of the input of supply convertor 40 and power supply unit 4 electrically connects; And through an inner switching circuit (among the figure indicate) conducting or the change action (switching) that ends with input voltage vin convert into output voltage V o1 in (+12VL) after, the electric energy of interior output voltage V o1 is sent to load (indicating among the figure) via output protection circuit 41 again.Output protection circuit 41 is electrically connected between the output of output and power supply unit 4 of supply convertor 40; In present embodiment; Output protection circuit 41 comprises between the output of output and power supply unit 4 that at least one switch element 41a is electrically connected at supply convertor 40; But, also can constitute output protection circuit 41 by a plurality of switch elements (not shown) that electrically is connected in parallel not as limit.
Control unit 42 is electrically connected at supply convertor 40 and output protection circuit 41, in order to control supply convertor 40 and output protection circuit 41 work respectively.Control unit 42 comprises: first control circuit 421 and second control circuit 422; Wherein, First control circuit 421 according to the operating frequency fs of supply convertor 40 with the corresponding control of interior output voltage V o1 output protection circuit 41 conductings or end; The then interior output voltage V o1 control of foundation supply convertor 40 work of second control circuit 422, the magnitude of voltage of output voltage V o1 is maintained load voltage value in making, for example 12V.Wherein the operating frequency fs of supply convertor 40 can obtain through the corresponding respectively signal of output after the sampling processing through detection module in the second control circuit 422 and feedback module (not shown) with the state of interior output voltage V o1, for example feedback signal or frequency signal.Control unit 42 can adopt artificial circuit (analogcircuit), digital circuit (digital circuit) or simulated digital hybrid circuit (analog-digital mixingcircuit) to realize in the present invention; Same first control circuit 421 also can adopt artificial circuit, digital circuit or simulated digital hybrid circuit to realize respectively with second control circuit 422, and concrete execution mode can be in subsequent implementation example illustrated but is not limited to the description content of this specification.See also Fig. 4 B; In present embodiment; The DC current gain of supply convertor 40 (DC Gain (Vo 1/Vin)) can change along with the ratio value (fs/fo) of operating frequency fs and rated frequency fo; Being that DC current gain is can be along with the increase of operating frequency fs corresponding reduces, and when the magnitude of voltage of interior output voltage V o1 during greater than load voltage value, second control circuit 422 can corresponding increase the operating frequency fs of supply convertor 40.On the contrary, when the magnitude of voltage of interior output voltage V o1 during less than load voltage value, second control circuit 422 can corresponding downgrade the operating frequency fs of supply convertor 40.Therefore, the magnitude of voltage of output voltage V o1 was maintained load voltage value in second control circuit 422 can make through the operating frequency fs of adjustment supply convertor 40, for example 12V.
Please consult Fig. 4 A again and cooperate Fig. 4 B; In present embodiment; When making the magnitude of voltage of interior output voltage V o1 of the power supply unit 4 of output voltage V o and operate as normal rise surpass load voltage value when one of them power supply unit 4 fault; For example surpass 12V; The supply convertor 40 of the power supply unit 4 of operate as normal drops to load voltage value for the magnitude of voltage of the interior output voltage V o1 of the power supply unit 4 that makes output voltage V o and operate as normal, and the operating frequency fs that 12V for example, the control unit 42 of the power supply unit 4 of operate as normal can control switch circuit (indicating among the figure) increases.Fs continues to increase when operating frequency; (fs＞fref1) and the magnitude of voltage of the interior output voltage V o1 of the power supply unit 4 of operate as normal are greater than the first default voltage value Vref1 (during Vol＞Vref1) greater than the first default frequency value fref1 to make the operating frequency fs of supply convertor 40 of power supply unit 4 of operate as normal; Control unit 42 can be through exporting disabled state (disabled state) the first control signal Vs end to switch element 41a control switch element 41a; Except the supply convertor 40 of the power supply unit 4 that can prevent operate as normal burns because of operating frequency increases, can prevent effectively that more the power supply unit 4 of operate as normal from backward currents taking place.
In present embodiment; First control circuit 421 comprises: first comparison circuit 4211, second comparison circuit 4212, AND 4213 (AND logic circuit) and drive circuit 4214 (drivingcircuit); Wherein first comparison circuit 4211 is electrically connected between the output and AND 4213 of supply convertor 40, in order to the magnitude of voltage of output voltage V o1 in judging whether greater than the first default voltage value Vref1 (Vol＞Vref1).Second comparison circuit 4212 is electrically connected between second control circuit 422 and the AND 4213, in order to judgment task frequency f s whether greater than the first default frequency value fref1 (fs＞fref1).
AND 4213 is electrically connected at first comparison circuit 4211, second comparison circuit 4212 and drive circuit 4214, carries out logical operation in order to the second comparison signal Vp2 that the first comparison signal Vp1 of first comparison circuit, 4211 outputs and second comparison circuit 4212 are exported.Drive circuit 4214 is electrically connected between the output of control end and AND 4213 of switch element 41a, in order to according to the 41a conducting of driving switch element as a result after AND 4213 logical operations or end.
(Vol＞Vref1) and operating frequency fs are greater than the first default frequency value fref1 (during fs＞fref1) greater than the first default voltage value Vref1 when the magnitude of voltage of interior output voltage V o1; The first comparison signal Vp1 of first comparison circuit 4211 and second comparison circuit, 4212 meeting difference output enable states and the second comparison signal Vp2 are to AND 4213; And, the first control signal Vs of drive circuit 4214 output disabled state is ended with driving switch element 41a via the result after AND 4213 logical operations.
On the contrary; (Vol＜Vref1) or operating frequency fs are less than the first default frequency value fref1 (during fs＜fref1) less than the first default voltage value Vref1 when the magnitude of voltage of interior output voltage V o1; The first comparison signal Vp1 of first comparison circuit 4211 or the corresponding respectively output disabled state of second comparison circuit, 4212 meetings or the second comparison signal Vp2 are to AND 4213; And via the result after AND 4213 logical operations, the first control signal Vs that makes drive circuit 4214 output enable states (enabled state) is with driving switch element 41a conducting.
Be not limited to any concrete execution mode among the present invention and obtain the interior output voltage V o1 that is relevant to supply convertor 40 and the signal of operating frequency fs, thus control protection electric circuit 41 by or conducting to reach the purpose of protection supply convertor 40.Because supply convertor 40 is numerous with the kind of control unit 42, below with giving an example respectively in order to its implementation and operation principle to be described.
See also Fig. 5 and cooperate Fig. 4 A, wherein Fig. 5 is the circuit diagram of the power supply unit of preferred embodiment of the present invention.As shown in Figure 5; Supply convertor 40 is LLC (inductance-inductor-capacitor) serial-resonant and comprises: input capacitance Cin, switching circuit 400, resonant circuit 401 (resonant circuit), transformer T (Transformer), output rectification circuit 402 and output capacitance Co, and second control circuit 422 comprises: feedback circuit 4221 (feedback circuit), synchronous commutating control circuit 4222 (Synchronous rectifier controlling circuit) and controller IC 604.
In supply convertor 40; Input capacitance Cin is electrically connected at the input side of switching circuit 400; Resonant circuit 401 is electrically connected between the outlet side of switching circuit 400 and the primary side Np of transformer T (primary side); Output rectification circuit 402 is electrically connected at the primary side Ns (secondary side) of transformer T; The end of output capacitance Co is electrically connected at output rectification circuit 402 and output protection circuit 41, and the other end of output capacitance Co is electrically connected at the negative terminal (ground connection symbol) of power supply unit 4.
In present embodiment; Feedback circuit 4221 comprises: error amplifying circuit 4223 (Error amplifiercircuit) and bleeder circuit 4224; Interior output voltage V o1 handles the back via bleeder circuit 4224 with error amplifying circuit 4223 in regular turn and produces error amplification signal Veaout; Therefore, the magnitude of voltage of error amplification signal Veaout can change along with the magnitude of voltage of interior output voltage V o1.In the present embodiment; Error amplifying circuit 4223 is a proportional integral circuit (Proportional-Integral circuit); But not as limit; Error amplifying circuit 4223 can be the circuit of a ratio circuit (Proportional circuit), an integrating circuit (Integral circuit) or its combination in other embodiment, can also be other other implementations that can realize output error amplifying signal Veaout.
Controller IC 604 also is electrically connected at the control end of switching circuit 400; The control end of first～the 4th switch element Q1～Q4 for example; In order to produce the control end of at least one second control signal OUTA according to error amplification signal Veaout to switching circuit 400; The magnitude of voltage of output voltage V o1 maintains load voltage value in making with 400 conductings of control switch circuit or the switch operating that ends; 12V for example, wherein, controller IC 604 makes the magnitude of voltage of interior output voltage V o1 maintain load voltage value through the operating frequency fs or the duty ratio (duty ratio) of adjustment switching circuit 400.
In present embodiment; Switching circuit 400 is for full-bridge type (full bridge) and comprise first～the 4th switch element Q1～Q4; Wherein the first switch element Q1 and the 3rd switch element Q3 electrically are connected in parallel in input capacitance Cin two ends after electrically being connected in series and constituting the first switch bridge (switch bridge) again; Second switch element Q2 and the 4th switch element Q4 electrically are connected in parallel in input capacitance Cin two ends after electrically being connected in series and constituting the second switch bridge again, and the first switch bridge and second switch bridge electrically are connected in parallel in input capacitance Cin.Controller IC 604 is electrically connected at the control end of first～the 4th switch element Q1～Q4, and produces the control end that the second control signal OUTA and the 3rd control signal OUTB are sent to first～the 4th switch element Q1～Q4 respectively according to error amplification signal Veaout.Wherein, controller IC 604 is through second control signal OUTA control the first, the 4th switch element Q1, Q4 conducting or end, and through second, third switch element of the 3rd control signal OUTB control Q2, Q3 conducting or end.In this instance; Because the magnitude of voltage of error amplification signal Veaout can change along with the magnitude of voltage of interior output voltage V o1; And controller IC 604 makes the magnitude of voltage of output voltage V o1 maintain load voltage value according to the operating frequency fs that error amplification signal Veaout adjusts the second control signal OUTA and the 3rd control signal OUTB; So when supply convertor 40 work; Controller IC 604 can become inverse change trend according to the second control signal OUTA that error amplification signal Veaout is produced along with error amplification signal Veaout with the operating frequency fs of the 3rd control signal OUTB, makes the magnitude of voltage of output voltage V o be maintained load voltage value.
In present embodiment; Output rectification circuit 402 is not for the synchronous rectification formula but as limit; It comprises: the 5th switch element Q5 and the 6th switch element Q6; Wherein, the 5th switch element Q5 is electrically connected between the negative output terminal of an end and power supply unit 4 of primary side Ns of transformer T, and the 6th switch element Q6 is electrically connected between the negative output terminal of the other end and power supply unit 4 of primary side Ns of transformer T.Synchronous commutating control circuit 4222 is electrically connected at the control end of output rectification circuit 402; The i.e. control end of the 5th switch element Q5 and the 6th switch element Q6, and the staggered conducting through controlling the 5th switch element Q5 and the 6th switch element Q6 or by the purpose that reaches rectification.When the 5th switch element Q5 conducting and the 6th switch element Q6 by the time, electric current can be flowed out by the centre cap (center tap) of the primary side Ns of transformer T, and flows to output capacitance Co and the 5th switch element Q5 in regular turn.When the 6th switch element Q6 conducting and the 5th switch element Q5 by the time, electric current can be flowed out by the centre cap of the primary side Ns of transformer T, and flows to output capacitance Co and the 6th switch element Q6 in regular turn.
See also Fig. 6 and cooperate Fig. 4 A and Fig. 5, wherein Fig. 6 is the circuit diagram of the first control circuit of preferred embodiment of the present invention.As shown in Figure 6; First comparison circuit 4211 comprises: first resistance R 649, second resistance R 650, the 3rd resistance R 651, the 4th resistance R 652, the first diode D605 and the first operational amplifier OP1 (Operation Amplifier); Wherein first resistance R 649 electrically connects with the output of supply convertor 40, and electrically is connected in series with second resistance R 650.The 3rd resistance R 651 is electrically connected between the positive input terminal of the series connection end K1 and the first operational amplifier OP1 (IC607); The 4th resistance R 652 and the first diode D605 electrically are connected in series between the output of the first operational amplifier OP1 and positive input terminal; The negative input end of the first operational amplifier OP1 receives one first voltage V1, for example 2.5V.
In present embodiment; Second comparison circuit 4212 comprises: the 5th resistance R 643, the 6th resistance R 644, the 7th resistance R 646, the 8th resistance R 647, the second diode D608 and the second operational amplifier OP2; Wherein an end of the 5th resistance R 643 and the 7th resistance R 646 is electrically connected at the positive input terminal of the second operational amplifier OP2; The other end of the 5th resistance R 643 is electrically connected at the negative terminal (ground connection symbol) of power supply unit 4; The second voltage V2,2.5V for example is sent to the other end of the 7th resistance R 646.The 6th resistance R 644 and the second diode D608 electrically are connected in series between the output of the second operational amplifier OP2 and positive input terminal; One end of the 8th resistance R 647 is electrically connected at the negative input end of the second operational amplifier OP2; The other end of the 8th resistance R 647 is electrically connected at second control circuit 422 (not indicating among the figure), and error amplification signal Veaout is sent to the other end of the 8th resistance R 647.
In present embodiment; Because the output of first operational amplifier OP1 of first comparison circuit 4211 and the second operational amplifier OP2 of second comparison circuit 4212 is for opening drain electrode formula (open drain) or opener electric pole type (open collector); AND 4213 can be electrically connected at the function that the 9th resistance R 645 constitutes AND 4213 with lead ways of connecting (wire and) through the output with the first operational amplifier OP1 and the second operational amplifier OP2; Wherein an end of the 9th resistance R 645 is electrically connected at the output of first comparison circuit 4211 and second comparison circuit 4212; The other end of the 9th resistance R 645 receives boost voltage Vcc, for example a 5V.
In present embodiment; Drive circuit 4214 comprises: driving switch element Q605, the tenth resistance R the 603, the 11 resistance R p and the 3rd diode D168; Wherein, Driving switch element Q605 is electrically connected between the control end (not shown) of output protection circuit 41 and the negative terminal of power supply unit 4 (ground connection symbol), and the control end of driving switch element Q605 then is electrically connected at the output of AND 4213.The end of the tenth resistance R 603 and the 3rd diode D168 is electrically connected at the control end of driving switch element Q605, and the other end of the tenth resistance R 603 and the 3rd diode D168 is electrically connected at the negative terminal of power supply unit 4 (ground connection symbol).The end of the 11 resistance R p is electrically connected at the negative terminal (ground connection symbol) of power supply unit 4, and the other end of the 11 resistance R p receives boost voltage Vcc.
In present embodiment; (Vo1＞Vref1) and operating frequency fs be (fs＞fref1 during greater than the first default frequency value fref1 greater than the first default voltage value Vref1 when the magnitude of voltage of interior output voltage V o1; Veaout＜Veaout1); First operational amplifier OP1 of first comparison circuit 4211 and the second operational amplifier OP2 of second comparison circuit 4212 can export the first comparison signal Vp1 and the second comparison signal Vp2 of enabled status of high potential respectively to AND 4213; And, make the driving switch element Q605 conducting of drive circuit 4214 and the first control signal Vs that exports the disabled state of electronegative potential ends with driving switch element 41a via the result after AND 4213 logical operations.
In present embodiment; First comparison circuit 4211 and second comparison circuit 4212 all have lagging characteristics; Therefore; When the magnitude of voltage of interior output voltage V o1 less than the first default voltage value Vref1 (during Vol＜(the first default voltage value Vref1～second default voltage value Vref2) Vref1) with the default voltage stagnant regions; At this moment, the magnitude of voltage of series connection end K1 is less than the first voltage V1 (Vref1=V1 * (1+R649/R650)), and the first comparison signal Vp1 of the disabled state that the first operational amplifier OP1 of first comparison circuit 4211 can corresponding output electronegative potential is to AND 4213; And export the signal of electronegative potential via the result after AND 4213 logical operations, the driving switch element Q605 that makes drive circuit 4214 by and the first control signal Vs of the enabled status of output high potential with driving switch element 41a conducting.Identical ground; When the magnitude of voltage of interior output voltage V o1 increases and greater than the second default voltage value Vref2 (Vo1＜Vref2; During Vref2=V1 * (1+ (R651+R649)/R652+R649 * ((R651+R652)/R650/R652))); When promptly the magnitude of voltage of the positive input terminal of the first operational amplifier OP1 was greater than the first voltage V1, the first operational amplifier OP1 can export the first comparison signal Vp1 of the enabled status of high potential.
Similarly; In present embodiment; When operating frequency fs less than first default frequency value fref1 (fs＜fref1; (the first default frequency value fref1～second default frequency value fref2 during with the default frequency stagnant regions of Veaout＞Veaout1); Be that error amplification signal Veaout is greater than acquiescence error amplification signal stagnant regions (the first acquiescence error amplification signal value Veaout1～second acquiescence error amplification signal value Veaout2)); At this moment, (the second comparison signal Vp2 of the disabled state that Veaout1=V2 * R643/ (R643+R646), the second operational amplifier OP2 of second comparison circuit 4212 can corresponding output electronegative potentials is to AND 4213 greater than the first acquiescence error amplification signal value Veaout1 for the magnitude of voltage of error amplification signal Veaout; And export the signal of electronegative potential via the result after AND 4213 logical operations, the driving switch element Q605 that makes drive circuit 4214 by and the first control signal Vs of the enabled status of output high potential with driving switch element 41a conducting.
In the above embodiments, the designer can be through the magnitude of voltage size of the adjustment first voltage V1, and makes the first default voltage value Vref1 and second default voltage value Vref2 is corresponding is adjusted.The first default voltage value Vref1=V1* (1+R649/R650) wherein, the second default voltage value Vref2=V1 * (1+ (R651+R649)/R652+R649* ((R651+R652)/R650/R652)).Similarly; The designer can be big or small through the magnitude of voltage of the adjustment second voltage V2, and make the first default frequency value fref1 and corresponding adjustment of the second default frequency value fref2 (the first acquiescence error amplification signal value Veaout1 and the second acquiescence error amplification signal value Veaout2).Wherein first of first default frequency value fref1 correspondence gives tacit consent to error amplification signal value Veaout1=V2*R643/ (R643+R646); The second acquiescence error amplification signal value Veaout2=V2* (R643//R644)/(R646+R643//R644) that the second default frequency value fref2 is corresponding promptly equals the second acquiescence error amplification signal value Veaout2 on the magnitude of voltage matter value of the positive input terminal of the second operational amplifier OP2.
In the above embodiments; First control circuit 421 and second control circuit 422 are artificial circuit in the control unit 42; But the present invention is not limited to this; Wherein first control circuit 421 can adopt a digital signal processor (DPS; Digital Signal Processor) with the simulate signal that receives convert into digital signal and through algorithm instruction (Algorithm/Instruction) accomplish relatively with the door function, same, second control circuit 422 also can adopt similar digital control approach to realize; For example adopt digital error amplifier to convert the simulate signal that receives into digital signal and accomplish, and can first control circuit 421 and second control circuit 422 be integrated in the same digital signal processor and realize through the algorithm instruction.
See also Fig. 7 and cooperate Fig. 8 and Fig. 5, wherein Fig. 7 is the circuit diagram of the power supply unit of another preferred embodiment of the present invention, and Fig. 8 is the control method sketch map of the power supply unit of preferred embodiment of the present invention.Present embodiment (shown in Figure 7) is with the difference of previous embodiment; The second control circuit 422 of Fig. 7 also is provided with a frequency detection circuit 4225; Counting circuit for example; Be electrically connected on the controller IC 604 and second comparison circuit 4212; Wherein, Frequency detection circuit 4225 can export second control signal OUTA of switching circuit 400 or/and the number of pulses of the 3rd control signal OUTB to through calculating a special time internal controller IC604, thereby obtains a count signal Vk relevant with the operating frequency fs of this supply convertor 40, second comparison circuit 4212 again through this count signal Vk judgment task frequency f s whether greater than the first default frequency value fref1 (fs＞fref1).In present embodiment; Second control circuit 422 has detection module and feedback module function; And frequency detection circuit 4225 exports the feedback signal of second comparison circuit 4212 to is count signal Vk; In order to the expression frequency signal; Wherein frequency detection circuit 4225 can also have the signal relevant with operating frequency fs and obtains the frequency signal that changes along with operating frequency fs through detecting any one, and for example, the contact (node) that utilizes the first and the 3rd switch element Q1 and Q3 in last electric current of first～the 4th switch element Q1～Q4 in the switching circuit 400 or the switching circuit 400 perhaps voltage etc. of the contact of the second and the 4th switch element Q2 and the Q4 detection signal that all can be used as frequency detection circuit 4225 is imported; Thereby obtain frequency signal, for example count signal Vk along with the operating frequency fs variation of this supply convertor 4.
In present embodiment; First control circuit 421 can adopt a digital signal processor (DPS; DigitalSignal Processor) with the simulate signal that receives convert into digital signal and through the algorithm instruction accomplish relatively with the door function; Same, second control circuit 422 also can adopt digital signal processor to realize tally function, and can first control circuit 421 and second control circuit 422 be integrated in the same digital signal processor and realize.In present embodiment; Counting circuit detects and the count signal Vk that produces the operating frequency fs that is relevant to supply convertor 40 can be converted into a voltage signal; Export second comparison circuit 4212 to through aforesaid mode again and compare, that is adopt the artificial circuit control mode to realize.In the above embodiments; Switch element can be but not be limited to metal oxide semiconductcor field effect transistor (Metal Oxide Semiconductor Field Effect Transistor; MOSFET), bipolar junction transistor (Bipolar Junction Transistor; BJT), thyristor (Silicon-Controlled Rectifier; SCR), the two carrier crystal pipes of insulated gate (Insulated Gate Bipolar Transistor, IGBT) or two-way thyristor switch (The triode AC switch, TRIAC).
From the above, the thin portion step of the control method of the power supply unit of preferred embodiment of the present invention comprises:
(a) supply convertor 40 is provided, in order to output voltage V o1 in input voltage vin is converted into;
(b) output protection circuit 41 is provided, is electrically connected between the output of output and power supply unit 4 of supply convertor 40, in order to protect power supply unit 4 to make its operate as normal through conducting or the work that ends;
(c) detect interior output voltage V o1;
(d) the operating frequency fs of detection supply convertor;
(e) relatively should in magnitude of voltage and the one first default voltage value Vref1 of output voltage V o1;
(f) the relatively frequency values of this operating frequency fs and one first default frequency value fref1; And
(g) when the frequency values of the operating frequency fs of supply convertor 40 greater than the magnitude of voltage of the first default frequency value fref1 and interior output voltage V o1 during greater than the first default voltage value Vref1, control unit 42 control output protection circuits 41 end.
In sum; The control method of power supply unit of the present invention and power supply unit with and the electric supply system that is suitable for; When making magnitude of voltage and the operating frequency of interior output voltage of power supply unit of operate as normal too high when one of them power supply unit fault; Control unit can be controlled output protection circuit and end, and makes power supply unit generation backward current or the operating frequency of operate as normal can be too high and burn with the power supply unit that prevents failover.In addition; The switch element of output protection circuit has the lower and conducting voltage of conduction impedance and falls less characteristic, therefore can make power supply unit of the present invention with and the power loss of the electric supply system that is suitable for reduces, working temperature reduces and the whole efficiency increase.
Those skilled in the art should recognize that change of being done and retouching all belong within the protection range of claim of the present invention under the situation that does not break away from appended scope of the present invention that claim disclosed of the present invention and spirit.
Claims (34)
1. power supply unit in order to the electric energy that receives an input voltage and produce an output voltage, comprises:
One supply convertor is in order to convert this input voltage into output voltage in;
One output protection circuit is electrically connected between the output of output and this power supply unit of this supply convertor, in order to protect this power supply unit to make its operate as normal through conducting or the action that ends; And
One control unit is electrically connected at this output protection circuit, in order to control this output protection circuit work;
Wherein, When the frequency values of an operating frequency of this supply convertor greater than one first default frequency value and should in the magnitude of voltage of output voltage during greater than one first default voltage value, this control unit through export one first control signal to this output protection circuit control end end to control this output protection circuit.
2. power supply unit as claimed in claim 1 is characterized in that this control unit comprises a first control circuit, and this first control circuit comprises:
One first comparison circuit is electrically connected at the output of this supply convertor, in order to the magnitude of voltage of judging output voltage in this whether greater than this first default voltage value;
One second comparison circuit, in order to the frequency values of judging this operating frequency whether greater than this first default frequency value; And
One AND; Be electrically connected at the output of this first comparison circuit and this second comparison circuit; One second comparison signal in order to one first comparison signal of this first comparison circuit output and this second comparison circuit are exported carries out logical operation, makes the conducting as a result of this output protection circuit counterlogic computing or ends.
3. power supply unit as claimed in claim 2; It is characterized in that; This first control circuit comprises one drive circuit; This drive circuit is electrically connected between the output of control end and this AND of this output protection circuit, in order to drive this output protection circuit conducting according to the result after this AND logical operation or to end.
4. power supply unit as claimed in claim 2; It is characterized in that; When the magnitude of voltage of output voltage in this greater than the frequency values of this first default voltage value and this operating frequency during greater than this first default frequency value; This first comparison signal of this first comparison circuit and this second comparison circuit difference output enable state and this second comparison signal are to this AND; And, make this first control signal of this drive circuit output disabled state and drive this output protection circuit and end via the result after this AND logical operation.
5. power supply unit as claimed in claim 2; It is characterized in that; This control unit also comprises a second control circuit, and this second control circuit is electrically connected at this supply convertor, converts this input voltage in this output voltage in order to control this supply convertor.
6. power supply unit as claimed in claim 5; It is characterized in that; This second control circuit comprises a feedback circuit; This feedback circuit provides a feedback signal that changes along with this operating frequency to this first control circuit, and wherein, whether the frequency values that this first control circuit is judged this operating frequency through this feedback signal is greater than this first default frequency value.
7. power supply unit as claimed in claim 6; It is characterized in that; This second control circuit also comprises a controller, and this controller is electrically connected at this supply convertor and this feedback circuit, controls signal to this supply convertor in order to produce at least one second according to this feedback signal; To control this supply convertor work, make the magnitude of voltage of output voltage in this maintain load voltage value.
8. power supply unit as claimed in claim 6 is characterized in that, this feedback circuit comprises:
One error amplifying circuit, this error amplifying circuit was in order to being converted into this feedback signal by interior output voltage, and this feedback signal is an error amplification signal.
9. power supply unit as claimed in claim 8 is characterized in that, this error amplifying circuit is selected from the circuit of a proportional integral circuit, a ratio circuit, an integrating circuit or its combination.
10. power supply unit as claimed in claim 8 is characterized in that, this error amplification signal becomes inverse change trend with this operating frequency.
11. power supply unit as claimed in claim 10; It is characterized in that; This second comparison circuit is through this error amplification signal relatively and one first acquiescence error amplification signal value corresponding to this first default frequency value, thereby whether the frequency values of judging this operating frequency is greater than this first default frequency value.
12. power supply unit as claimed in claim 6 is characterized in that, this second comparison circuit comprises:
One second operational amplifier;
One the 5th resistance is electrically connected at the positive input terminal of this second operational amplifier;
One second diode;
One the 6th resistance, the 6th resistance and this second diode electrically are connected in series between the output of this second operational amplifier and positive input terminal;
One the 7th resistance, an end of the 7th resistance are electrically connected at the positive input terminal of this second operational amplifier to receive one second voltage; And
One the 8th resistance, an end of the 8th resistance is electrically connected at the negative input end of this second operational amplifier, and the other end of the 8th resistance is electrically connected at this second control circuit to receive this error amplification signal.
13. power supply unit as claimed in claim 2 is characterized in that, this first comparison circuit comprises:
One first resistance, the output that is electrically connected at this supply convertor end of connecting with;
One second resistance electrically is connected in series in this end of connecting with this first resistance;
One first operational amplifier, the negative input end of this first operational amplifier receive one first voltage;
One the 3rd resistance is electrically connected between the positive input terminal of this series connection end and this first operational amplifier;
One first diode; And
One the 4th resistance, the 4th resistance and this first diode electrically are connected in series between the output of this first operational amplifier and positive input terminal.
14. power supply unit as claimed in claim 6; It is characterized in that; This feedback circuit comprises a counting circuit, and the number of pulses that is used to write down the detection signal in the certain hour is to export this feedback signal of this power supply unit operating frequency of reaction, and this feedback signal is a count signal.
15. power supply unit as claimed in claim 14; It is characterized in that this second control circuit also comprises a controller, this supply convertor work of this controller control; Make the magnitude of voltage of output voltage in this maintain load voltage value; This controller is electrically connected at this supply convertor and this feedback circuit, and this controller produces at least one second and controls signal to this supply convertor and this feedback circuit, and this detection signal is this second control signal.
16. power supply unit as claimed in claim 14 is characterized in that, this second comparison circuit is through relatively this count signal and this first default frequency value, thereby whether the frequency values of judging this operating frequency is greater than this first default frequency value.
17. power supply unit as claimed in claim 2; It is characterized in that; The output of this first comparison circuit and this second comparison circuit is for opening drain electrode formula or opener electric pole type; And this AND comprises: one the 9th resistance, and an end of the 9th resistance is electrically connected at the output of this first comparison circuit and this second comparison circuit, and the other end of the 9th resistance receives a boost voltage.
18. power supply unit as claimed in claim 2; It is characterized in that; When the magnitude of voltage of output voltage in this less than this first default voltage value or this operating frequency during less than this first default frequency value; This first comparison signal of the corresponding respectively output disabled state of this first comparison circuit or this second comparison circuit or this second comparison signal are to this AND; And via the result after this AND logical operation, this first control signal that makes this drive circuit output enable state is to drive this output protection circuit conducting.
19. power supply unit as claimed in claim 2; It is characterized in that; This first comparison circuit has lagging characteristics, when the magnitude of voltage of output voltage in this during less than this first a default voltage value and a default voltage stagnant regions, this first comparison signal of the corresponding output of this first comparison circuit disabled state to and this lock logical circuit; And via the result after this AND logical operation, this first control signal that makes this drive circuit output enable state is to drive this output protection circuit conducting.
20. power supply unit as claimed in claim 2; It is characterized in that; This second comparison circuit has lagging characteristics, and when this operating frequency during less than this first a default frequency value and a default frequency stagnant regions, this second comparison signal of the corresponding output of this second comparison circuit disabled state is to this AND; And via the result after this AND logical operation, this first control signal that makes this drive circuit output enable state is to drive this output protection circuit.
21. power supply unit as claimed in claim 2; It is characterized in that; This supply convertor comprises: a switching circuit, a resonant circuit and a transformer; Wherein this resonant circuit is electrically connected between the primary side of outlet side and this transformer of this switching circuit, and the primary side of this transformer is electrically connected at this output protection circuit.
22. power supply unit as claimed in claim 2 is characterized in that, this supply convertor is inductance-inductor-capacitor serial-resonant or inductance-inductor-capacitor parallel resonance formula.
23. an electric supply system produces an output voltage and system's output current in order to the electric energy that receives an input voltage, comprises:
A plurality of power supply units are connected in parallel with each other, and wherein at least one power supply unit comprises:
One supply convertor is in order to convert this input voltage into output voltage in;
One output protection circuit is electrically connected between the output of output and this power supply unit of this supply convertor, in order to protect this power supply unit to make its operate as normal through conducting or the work that ends; And
One control unit is electrically connected at this output protection circuit, in order to control this output protection circuit work;
Wherein, When the frequency values of an operating frequency of this supply convertor greater than one first default frequency value and should in the magnitude of voltage of output voltage during greater than one first default voltage value, this control unit through export one first control signal to this output protection circuit control end end to control this output protection circuit.
24. electric supply system as claimed in claim 23 is characterized in that, this control unit comprises a first control circuit, and this first control circuit comprises:
One first comparison circuit is electrically connected at the output of this supply convertor, in order to the magnitude of voltage of judging output voltage in this whether greater than this first default voltage value;
One second comparison circuit, in order to the frequency values of judging this operating frequency whether greater than this first default frequency value; And
One AND; Be electrically connected at the output of this first comparison circuit and this second comparison circuit; One second comparison signal in order to one first comparison signal of this first comparison circuit output and this second comparison circuit are exported carries out logical operation, makes the conducting as a result of this output protection circuit counterlogic computing or ends.
25. electric supply system as claimed in claim 24; It is characterized in that; This control unit also comprises a second control circuit, and this second control circuit is electrically connected at this supply convertor, converts this input voltage in this output voltage in order to control this supply convertor; This second control circuit comprises the output that a feedback circuit is electrically connected at this supply convertor; This feedback circuit provides a feedback signal that changes along with this operating frequency to this first control circuit; Wherein, this first control circuit judge this operating frequency through this feedback signal frequency values whether greater than this first default frequency value.
26. the control method of a power supply unit comprises step:
One supply convertor is provided, in order to an input voltage is converted into output voltage in;
One output protection circuit is provided, is electrically connected between the output of output and this power supply unit of this supply convertor, in order to protect this power supply unit to make its operate as normal through conducting or the work that ends;
Detect and be somebody's turn to do interior output voltage;
Detect an operating frequency of this supply convertor;
The magnitude of voltage and the one first default voltage value of output voltage in relatively being somebody's turn to do;
The relatively frequency values of this operating frequency and one first default frequency value; And
When the frequency values of this operating frequency of this supply convertor greater than this first default frequency value and should in the magnitude of voltage of output voltage during greater than this first default voltage value, control this output protection circuit and end.
27. the control method of power supply unit as claimed in claim 26 is characterized in that, this operating frequency system of detecting this supply convertor is through detecting the feedback signal that detection signal relevant with this operating frequency and output change along with this operating frequency.
28. the control method of power supply unit as claimed in claim 27 is characterized in that, this detection signal is output voltage in being somebody's turn to do.
29. the control method of power supply unit as claimed in claim 28 is characterized in that, this feedback signal is the error amplification signal that output voltage is exported through an error amplification procedure in this.
30. the control method of power supply unit as claimed in claim 27 is characterized in that, this detection signal has the frequency corresponding with this operating frequency.
31. the control method of power supply unit as claimed in claim 30 is characterized in that, this feedback signal is the count signal of this detection signal through counting step output.
32. the control method of power supply unit as claimed in claim 31 is characterized in that, this supply convertor is through this supply convertor work of controller control, and wherein this detection signal is an output pulse signal of this controller.
33. the control method of power supply unit as claimed in claim 27 is characterized in that, relatively the frequency values of this operating frequency and one first default frequency value be relatively this feedback signal and one the reaction this first default frequency value a default frequency value signal.
34. the control method of power supply unit as claimed in claim 26; It is characterized in that, comprise a determining step in order to the frequency values of this operating frequency of judging this supply convertor greater than one first default frequency value and should in the magnitude of voltage of output voltage greater than one first default voltage value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010538320.4A CN102468760B (en) | 2010-11-01 | 2010-11-01 | Power supply device, control method thereof and power supply system using power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010538320.4A CN102468760B (en) | 2010-11-01 | 2010-11-01 | Power supply device, control method thereof and power supply system using power supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102468760A true CN102468760A (en) | 2012-05-23 |
| CN102468760B CN102468760B (en) | 2014-09-10 |
Family
ID=46072028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010538320.4A Active CN102468760B (en) | 2010-11-01 | 2010-11-01 | Power supply device, control method thereof and power supply system using power supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102468760B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135153A (en) * | 2014-07-22 | 2014-11-05 | 四川升华电源科技有限公司 | DC-DC module power supply |
| CN109901975A (en) * | 2019-03-27 | 2019-06-18 | 英业达科技有限公司 | Power control unit and control method |
| CN112003455A (en) * | 2019-05-27 | 2020-11-27 | 台达电子工业股份有限公司 | Power supply and control method thereof |
| CN113098333A (en) * | 2021-04-01 | 2021-07-09 | 东风汽车集团股份有限公司 | Control method of air conditioner servo motor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6185082B1 (en) * | 1999-06-01 | 2001-02-06 | System General Corporation | Protection circuit for a boost power converter |
| US7385375B2 (en) * | 2005-02-23 | 2008-06-10 | Coldwatt, Inc. | Control circuit for a depletion mode switch and method of operating the same |
-
2010
- 2010-11-01 CN CN201010538320.4A patent/CN102468760B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6185082B1 (en) * | 1999-06-01 | 2001-02-06 | System General Corporation | Protection circuit for a boost power converter |
| US7385375B2 (en) * | 2005-02-23 | 2008-06-10 | Coldwatt, Inc. | Control circuit for a depletion mode switch and method of operating the same |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135153A (en) * | 2014-07-22 | 2014-11-05 | 四川升华电源科技有限公司 | DC-DC module power supply |
| CN104135153B (en) * | 2014-07-22 | 2015-07-22 | 杨燕平 | DC-DC module power supply |
| CN109901975A (en) * | 2019-03-27 | 2019-06-18 | 英业达科技有限公司 | Power control unit and control method |
| CN112003455A (en) * | 2019-05-27 | 2020-11-27 | 台达电子工业股份有限公司 | Power supply and control method thereof |
| US11095225B2 (en) | 2019-05-27 | 2021-08-17 | Delta Electronics, Inc. | Power supply apparatus and control method thereof |
| CN112003455B (en) * | 2019-05-27 | 2022-04-29 | 台达电子工业股份有限公司 | Power supply and control method thereof |
| CN113098333A (en) * | 2021-04-01 | 2021-07-09 | 东风汽车集团股份有限公司 | Control method of air conditioner servo motor |
| CN113098333B (en) * | 2021-04-01 | 2022-03-29 | 东风汽车集团股份有限公司 | Control method of air conditioner servo motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102468760B (en) | 2014-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI436540B (en) | Power supply and the control method for controlling the same and power supply system incorporating such power supplies | |
| JP6284081B2 (en) | Inverter device | |
| US9252682B2 (en) | Grid-connected inverter apparatus and control method therefor | |
| CN1906835B (en) | Power factor improving circuit and switching power supply | |
| EP2157684A1 (en) | Electric power source control device and heat pump device using the electric power source control device | |
| CN103427474B (en) | The control method of uninterrupted power supply(ups), uninterrupted power supply(ups) | |
| JP4850009B2 (en) | Matrix converter | |
| US8792215B2 (en) | Switch unit and power generation system thereof | |
| CN102214929A (en) | Grid-connected inverter | |
| CN106961094B (en) | The system of input undervoltage and overvoltage protection is provided for supply convertor | |
| CN108414873A (en) | A kind of three-phase inverter power device open fault detection method | |
| CN102468760B (en) | Power supply device, control method thereof and power supply system using power supply device | |
| JP5200975B2 (en) | Current detection device for power conversion circuit | |
| CN110611298A (en) | IPM protection system for flywheel energy storage device | |
| CN110829364A (en) | Electric leakage protection circuit, electric leakage protection device and electric equipment | |
| US8134847B2 (en) | Circuit arrangement and method for converting an alternating voltage into a rectified voltage | |
| US9013171B2 (en) | Method and apparatus for detecting a zero-voltage condition across four quadrant switches | |
| WO2016157391A1 (en) | Drive device, matrix converter, and elevator system | |
| CN108023482A (en) | Power-supply device | |
| JP2017195736A (en) | Power conversion device | |
| CN207150418U (en) | Current foldback circuit and motor driver | |
| CN107370354B (en) | A kind of AC input current Surge suppression system | |
| US20230261653A1 (en) | Drive control circuit for power semiconductor element, power semiconductor module, and power converter | |
| CN210629083U (en) | Electric leakage protection device and electric equipment | |
| CN214755496U (en) | Current protection control circuit of totem-pole boost converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |