CN103516043A - Power switching control signal generation circuit, and system method for dual-power redundancy power supplying - Google Patents
Power switching control signal generation circuit, and system method for dual-power redundancy power supplying Download PDFInfo
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- CN103516043A CN103516043A CN201210213258.0A CN201210213258A CN103516043A CN 103516043 A CN103516043 A CN 103516043A CN 201210213258 A CN201210213258 A CN 201210213258A CN 103516043 A CN103516043 A CN 103516043A
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Abstract
The invention discloses a power switching control signal generation circuit, and a system and method for dual-power redundancy power supplying. The dual-power redundancy power supplying system comprises a load, a master power supply module, a slave power supply module, a power switching control signal generation circuit, and a load power control module. The power switching control signal generation circuit consists of a redundancy power supply module, a first voltage amplification module, a second voltage amplification module, a division module, and a comparison module. According to the technical scheme, a precise power switching control signal is generated according to a ratio of power supply currents of the master power supply module and the slave power supply module; and then system power consumption controlling is carried out based on the ratio of current sharing loads, thereby maximizing the power supply capability of the system and reducing function capability wasting caused by wrong determination. The switching process is synchronous with the changing of the power supply voltage; the switching time point can be controlled accurately; seamless controlling is realized; and overloading during the intermediate process can be avoided.
Description
Technical field
The present invention relates to power technique fields, particularly relate to a kind of power switch-over control signal and produce circuit, dual power supply redundancy electric power system and method.
Background technology
At present, many power supply redundancys technology is used widely, and for example, the equipment of most desktop teleworkings is supported POE(Power over Ethernet, Power over Ethernet module simultaneously) and adapter power supply, can improve desk tops and succinctly spend.If office equipment is supported POE power supply, client only needs a netting twine can realize online and two functions of powering; If office equipment is not supported POE power supply, client also can power with adapter.For the supply power mode of two kinds of power supplys, all requirement can realize seamless switching, so that client can freely be switched the mode of power supply, so that the continuity of proof load work and there will not be disruption.
But what can not ignore is, because Power over Ethernet module maximum can provide 13W, and more than adapter can provide 20W, therefore, if equipment is supported POE and adapter power supply, for making full use of the efficiency of two kinds of power supplys, mostly can be designed to: during adapter power supply, enabled systems repertoire, guarantees maximal efficiency work; And POE when power supply need to be limited some function, make equipment power dissipation be less than the maximum power dissipation of POE, in order to avoid there is overload power down protection.If power supply is while switching from High Power Adapter to small-power POE; whole loads when POE can carry adapter power supply moment; now; system power dissipation is much larger than the maximum power that can provide of POE; there will be and transship the risk of power down; the equipment of need to waiting until is closed some functional module or is reduced after module oneself power consumption, and the maximum power that system power dissipation just can provide lower than POE prevents from transshipping power down protection.
Therefore, prior art provides following technical scheme, refers to Fig. 1, and Fig. 1 is the electrical block diagram that a kind of power switch-over control signal of prior art produces circuit.
As shown in Figure 1, this is traditional redundant power supply design of an adapter and POE (being Power over Ethernet module), the electric current of adapter (not illustrating) input is from the anode input of diode D22, POE(does not illustrate) electric current of input is from the anode input of diode D11, wherein system power supply voltage request is 12V, according to the redundant power supply principle of double diode, which supply voltage is high, which will provide relatively large load current, suppose that adapter B ' point voltage is 12V herein, POE A ' point voltage is 11.5V, being configured to adapter preferentially powers), by the dividing potential drop of resistance R 1 and R2, obtaining E point voltage is the value of 12V*R2/ (R1+R2)=3.3V(R1 and R2, according to the voltage request of control signal, set, it is 3.3V that supposing the system requires high level, low level is 0V), system power dissipation control signal is high level, expression system is being used adapter power supply.
When adapter cuts out; B point voltage can reduce, and E point voltage is along with reduction, when E point drops to 0V; adapter is stopped power supply completely; now, POE powers separately, and system power dissipation control signal is low level; expression system is being used POE power supply; equipment is switched to POE powering mode by power consumption, guarantees that equipment power dissipation provides maximum power lower than POE simultaneously, prevents from transshipping power down protection.
There is following problem in above circuit: only when adapter output voltage is reduced to 0V, just adapter power down can be detected, adjustment System power consumption, but, in redundant power supply design, be not a simple power supply conventionally, the situation that another is not powered, but when a Power supply current reduction, another one power supply can be filled its aftercurrent, guarantee system energy continued power.
In this design, there will be an intermediateness, two power supplys load current of sharing system according to a certain percentage, in the case, if according to above-mentioned traditional design, cannot carry out power consumption control to intermediateness.Now, according to electric current, share ratio and calculate, even if system reaches maximum power dissipation, if the power consumption that POE bears is less than 13W, just needn't make restriction to system power dissipation.And in traditional design, but can only judge Power supply and two states of not powering.If the power supply state of test adaptor only, when intermediateness, system can judge that adapter is still in power supply, because now adaptor power supplies is not reduced to 0V, yet at this moment, POE also can carry a part of system power dissipation, if the power consumption that POE bears surpasses 13W, system, when maximum power dissipation is switched, there will be the lower electricity of overload; Otherwise, if be revised as the power supply state that detects POE, when intermediateness, system can judge that POE is still in power supply, system can limit system power dissipation, yet at this moment, if the power consumption that POE bears is lower than 13W,, without system is carried out to power consumption constraints, so just wasted the power supply capacity of system.
As a rule, the output voltage of power supply is not a fixing value accurately, a but scope, according to the Redundancy Design principle of double diode, the voltage height of two-way power supply and the ratio of itself institute's load sharing electric current are directly proportional, this just means that intermediateness not only appears in electrical source exchange process, when practical application, also likely often occurs.This just becomes the inherent shortcoming of this system.
Below refer to Fig. 2, Fig. 2 is the electrical block diagram that another power switch-over control signal of prior art produces circuit.Going out is as shown in Figure 2 the power supply selective system (a certain moment, only have a power supply in power supply, can not two power supplys simultaneously power) of a two-way power supply alternative.Supposing the system default setting is 103 power supplies of Power over Ethernet module, now power-supply controller 101 output switch control signals are high level, gate-controlled switch 102 disconnects, and makes adapter 104 and load 105 in off-state, and Power over Ethernet module 103 gives separately load 105 power supplies.
When too the input voltage of net supply module 103 reduces, gate-controlled switch 102 can detect this voltage automatically, when detecting, be reduced to normal range (NR) when following (now too net supply module 103 is stopped power supply), the switch controlling signal of output becomes low level, open gate-controlled switch 102, adapter 104 is connected with load 105, and adapter 104 gives separately load 105 power supplies.This alternative of just having realized two-way power supply switches, and power managed now depends on the switch controlling signal of gate-controlled switch 102.
The signal that the control gate-controlled switch 102 of this design is opened or closed is not universal signal, is subject to the restriction of gate-controlled switch 102.If this switch controlling signal not in circuit design, cannot be used this design.And in order to realize the seamless switching of two-way power supply, guarantee that the running of system is continuous, to the switching speed of gate-controlled switch, require high, load is larger, and switching speed requires faster, otherwise less, the general switching speed of industry can limit the applicable loading condition of this design at present, and versatility is poor.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of power switch-over control signal and produces circuit, dual power supply redundancy electric power system and embodiment of the method, can produce accurate power switch-over control signal according to main supply module with from the ratio of the supply current of supply module.
The present invention is that the technical scheme that technical solution problem adopts is: a kind of dual power supply redundancy electric power system is provided, comprise load, main supply module and from supply module, main supply module provides the first supply current to load, from supply module, provide the second supply current to load, the maximum power dissipation of load is less than or equal to the peak power output of main supply module, and be greater than the peak power output from supply module, this system further comprises that power switch-over control signal produces circuit and bearing power control module, wherein this power switch-over control signal generation circuit comprises: redundant power module, the first supply current is sampled to produce the first voltage signal corresponding to the current value of the first supply current, the second supply current is sampled to produce the second voltage signal corresponding to the current value of the second supply current, the first voltage amplification module, carries out voltage amplification processing to produce the first voltage amplification signal with predetermined multiplication factor to the first voltage signal, second voltage amplification module, carries out voltage amplification processing to produce second voltage amplifying signal with predetermined multiplication factor to second voltage signal, division module, compares threshold voltage divided by the first voltage amplification signal to produce by second voltage amplifying signal, comparison module, to compare than threshold voltage and threshold voltage, when being greater than threshold voltage than threshold voltage, export the first power switch-over control signal, when being less than or equal to threshold voltage than threshold voltage, export the second power switch-over control signal, wherein, the magnitude of voltage of threshold voltage equal from the peak power output of supply module with the maximum power dissipation of load is deducted from the ratio of the peak power output gained difference of supply module, and bearing power control module is decreased to the power consumption of load the peak power output from supply module when getting the first power switch-over control signal, when getting the second power switch-over control signal, keep the power consumption of load constant.
The present invention is that another technical scheme that technical solution problem adopts is: provide a kind of power switch-over control signal to produce circuit, this circuit comprises: redundant power module, main supply module is provided to the first supply current of load and samples to produce the first voltage signal corresponding to the current value of the first supply current, the second supply current providing from supply module is sampled to produce the second voltage signal corresponding to the current value of the second supply current; The first voltage amplification module, carries out voltage amplification processing to produce the first voltage amplification signal with predetermined multiplication factor to the first voltage signal; Second voltage amplification module, carries out voltage amplification processing to produce second voltage amplifying signal with predetermined multiplication factor to second voltage signal; Division module, compares threshold voltage divided by the first voltage amplification signal to produce by second voltage amplifying signal; Comparison module, to compare than threshold voltage and threshold voltage, when being greater than threshold voltage than threshold voltage, export the first power switch-over control signal, when being less than or equal to threshold voltage than threshold voltage, export the second power switch-over control signal, wherein, the magnitude of voltage of threshold voltage equal from the peak power output of supply module with the maximum power dissipation of load is deducted from the ratio of the peak power output gained difference of supply module.
The present invention is that another technical scheme that technical solution problem adopts is: a kind of dual power supply redundancy method of supplying power to is provided, comprise the following steps: main supply module is provided to the first supply current of load and samples to produce the first voltage signal corresponding to the current value of the first supply current, to providing from supply module to the second supply current of load, sample to produce the second voltage signal corresponding to the current value of the second supply current; With predetermined multiplication factor, the first voltage signal is carried out to voltage amplification processing to produce the first voltage amplification signal, with predetermined multiplication factor, second voltage signal is carried out to voltage amplification processing to produce second voltage amplifying signal; Second voltage amplifying signal is compared to threshold voltage divided by the first voltage amplification signal to produce; To compare than threshold voltage and threshold voltage, when being greater than threshold voltage than threshold voltage, export the first power switch-over control signal, when being less than or equal to threshold voltage than threshold voltage, export the second power switch-over control signal, wherein, the magnitude of voltage of threshold voltage equal from the peak power output of supply module with the maximum power dissipation of load is deducted from the ratio of the peak power output gained difference of supply module; According to the first power switch-over control signal, the power consumption of load is decreased to the peak power output from supply module, or keeps the power consumption of load constant according to the second power switch-over control signal.
Be different from the situation of prior art, the power switch-over control signal of the embodiment of the present invention produces circuit, dual power supply redundancy electric power system and method can produce accurate power switch-over control signal according to main supply module with from the ratio of the supply current of supply module, thereby the ratio based on electric current load sharing is carried out system power dissipation control, maximizing utilize system power supply ability, reduce the Functional Capability waste that mistaken verdict brings, handoff procedure is synchronized with the variation of supply voltage, can accurately control some switching time, accomplish seamless control, avoid the load overload of pilot process.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram that a kind of power switch-over control signal of prior art produces circuit;
Fig. 2 is the electrical block diagram that another power switch-over control signal of prior art produces circuit;
Fig. 3 is according to the electrical block diagram of the dual power supply redundancy electric power system of first embodiment of the invention;
Fig. 4 is according to the physical circuit figure of the dual power supply redundancy electric power system of first embodiment of the invention;
Fig. 5 is input voltage and the output voltage location diagram of bipolar tube;
Fig. 6 is the input voltage of bipolar tube and the difference of output voltage and the graph of relation of the current value passing through;
Fig. 7 is the circuit structure diagram of PNP transistor amplifier;
Fig. 8 is the circuit structure diagram of divider;
Fig. 9 produces the signal timing diagram of each point in circuit according to the power switch-over control signal of first embodiment of the invention; And
Figure 10 is according to the flow chart of the dual power supply redundancy method of supplying power to of second embodiment of the invention.
Embodiment
The embodiment of the present invention provides a kind of dual power supply redundancy electric power system, comprise load, main supply module and from supply module, main supply module provides the first supply current to load, from supply module, provide the second supply current to load, the maximum power dissipation of load is less than or equal to the peak power output of main supply module, and be greater than the peak power output from supply module, this system further comprises that power switch-over control signal produces circuit and bearing power control module, wherein this power switch-over control signal generation circuit comprises: redundant power module, the first supply current is sampled to produce the first voltage signal corresponding to the current value of the first supply current, the second supply current is sampled to produce the second voltage signal corresponding to the current value of the second supply current, the first voltage amplification module, carries out voltage amplification processing to produce the first voltage amplification signal with predetermined multiplication factor to the first voltage signal, second voltage amplification module, carries out voltage amplification processing to produce second voltage amplifying signal with predetermined multiplication factor to second voltage signal, division module, compares threshold voltage divided by the first voltage amplification signal to produce by second voltage amplifying signal, comparison module, to compare than threshold voltage and threshold voltage, when being greater than threshold voltage than threshold voltage, export the first power switch-over control signal, when being less than or equal to threshold voltage than threshold voltage, export the second power switch-over control signal, wherein, the magnitude of voltage of threshold voltage equal from the peak power output of supply module with the maximum power dissipation of load is deducted from the ratio of the peak power output gained difference of supply module, and bearing power control module is decreased to the power consumption of load the peak power output from supply module when getting the first power switch-over control signal, when getting the second power switch-over control signal, keep the power consumption of load constant.
The embodiment of the present invention further provides a kind of power switch-over control signal to produce circuit, this circuit comprises: redundant power module, main supply module is provided to the first supply current of load and samples to produce the first voltage signal corresponding to the current value of the first supply current, the second supply current providing from supply module is sampled to produce the second voltage signal corresponding to the current value of the second supply current; The first voltage amplification module, carries out voltage amplification processing to produce the first voltage amplification signal with predetermined multiplication factor to the first voltage signal; Second voltage amplification module, carries out voltage amplification processing to produce second voltage amplifying signal with predetermined multiplication factor to second voltage signal; Division module, compares threshold voltage divided by the first voltage amplification signal to produce by second voltage amplifying signal; Comparison module, to compare than threshold voltage and threshold voltage, when being greater than threshold voltage than threshold voltage, export the first power switch-over control signal, when being less than or equal to threshold voltage than threshold voltage, export the second power switch-over control signal, wherein, the magnitude of voltage of threshold voltage equal from the peak power output of supply module with the maximum power dissipation of load is deducted from the ratio of the peak power output gained difference of supply module.
The embodiment of the present invention further provides a kind of dual power supply redundancy method of supplying power to, comprise the following steps: main supply module is provided to the first supply current of load and samples to produce the first voltage signal corresponding to the current value of the first supply current, to providing from supply module to the second supply current of load, sample to produce the second voltage signal corresponding to the current value of the second supply current; With predetermined multiplication factor, the first voltage signal is carried out to voltage amplification processing to produce the first voltage amplification signal, with predetermined multiplication factor, second voltage signal is carried out to voltage amplification processing to produce second voltage amplifying signal; Second voltage amplifying signal is compared to threshold voltage divided by the first voltage amplification signal to produce; To compare than threshold voltage and threshold voltage, when being greater than threshold voltage than threshold voltage, export the first power switch-over control signal, when being less than or equal to threshold voltage than threshold voltage, export the second power switch-over control signal, wherein, the magnitude of voltage of threshold voltage equal from the peak power output of supply module with the maximum power dissipation of load is deducted from the ratio of the peak power output gained difference of supply module; According to the first power switch-over control signal, the power consumption of load is decreased to the peak power output from supply module, or keeps the power consumption of load constant according to the second power switch-over control signal.
Pass through technique scheme, the power switch-over control signal of the embodiment of the present invention produces circuit, dual power supply redundancy electric power system and method can produce accurate power switch-over control signal according to main supply module with from the ratio of the supply current of supply module, thereby the ratio based on electric current load sharing is carried out system power dissipation control, maximizing utilize system power supply ability, reduce the Functional Capability waste that mistaken verdict brings, handoff procedure is synchronized with the variation of supply voltage, can accurately control some switching time, accomplish seamless control, avoid the load overload of pilot process.
Below in conjunction with specific embodiment, the power switch-over control signal of the embodiment of the present invention being produced to circuit, dual power supply redundancy electric power system and method is described.
Refer to Fig. 3, Fig. 3 is the electrical block diagram of the dual power supply redundancy electric power system of the embodiment of the present invention.As shown in Figure 3, dual power supply redundancy electric power system of the present invention comprises load 203, main supply module 201, from supply module 202, power switch-over control signal, produces circuit 20 and bearing power control module 209, main supply module 201 provides the first supply current to load 203, from supply module 202, provides the second supply current to load 203.
Wherein, the maximum power dissipation of load 203 is less than or equal to the peak power output of main supply module 201, and be greater than from the peak power output of supply module 202, due to main supply module 201 and not identical from the peak power output of supply module 202, therefore, dual power supply redundancy electric power system of the present invention is a kind of asymmetrical electric supply system.
Please continue referring to Fig. 3, as shown in Figure 3, power switch-over control signal of the present invention produces circuit 20 and comprises redundant power module 204, the first voltage amplification module 205, second voltage amplification module 206, division module 207 and comparison module 208.
Wherein, 204 pairs of the first supply currents of redundant power module sample to produce the first voltage signal corresponding to the current value of the first supply current, and the second supply current is sampled to produce the second voltage signal corresponding to the current value of the second supply current.The first voltage amplification module 205 is carried out voltage amplification processing to produce the first voltage amplification signal with predetermined multiplication factor to the first voltage signal, and second voltage amplification module 206 carries out voltage amplification processing to produce second voltage amplifying signal with identical predetermined multiplication factor to second voltage signal.Division module 207 compares threshold voltage divided by the first voltage amplification signal to produce by second voltage amplifying signal.Comparison module 208 will compare than threshold voltage and threshold voltage Vret, export the first power switch-over control signal when being greater than threshold voltage Vret than threshold voltage, export the second power switch-over control signal when being less than or equal to threshold voltage Vret than threshold voltage.
The magnitude of voltage of above-mentioned threshold voltage Vret equals from the peak power output of supply module 202 and the maximum power dissipation of load 203 is deducted from the ratio of the peak power output gained difference of supply module 202.For example, if the peak power output of main supply module 201 is 20w, the maximum power dissipation of load 203 is 20w, from the peak power output of supply module 202, is 13w, can set threshold voltage Vret be 13/(20-13)=13/7.
Dual power supply redundancy electric power system of the present invention further comprises bearing power control module 209, when getting the first power switch-over control signal, the power consumption of load 203 is decreased to from the peak power output of supply module 202, when getting the second power switch-over control signal, keeps the power consumption of load 203 constant.Thereby guarantee from supply module 202 work that can not overload.
Due to asymmetrical, from supply module 202 and main supply module 201, by redundant power module 204, to load 203, power, redundant power module 204 has not only been realized the redundant power supply design of two-way power supply, the current signal of two-way power supply can also be converted to the first voltage signal and second voltage signal (being the voltage signal of a small magnitude), and the first voltage amplification module 205 and second voltage amplification module 206 can be amplified to respectively OK range by this first voltage signal and second voltage signal, division module 207 will be calculated since the first voltage amplification signal of supply module 202 and main supply module 201 and the ratio of the first voltage amplification signal, Vret makes comparisons with threshold voltage, to produce the first power switch-over control signal or the second power switch-over control signal, dual power supply redundancy electric power system utilizes this first power switch-over control signal or the second power switch-over control signal to judge fast current power supply state and the power consumption distribution condition of load 203, the synchronous power consumption of adjusting load 203, reach the object of synchronous switch load 203 power consumptions.
Below refer to Fig. 4 and make detailed description with the particular circuit configurations of the dual power supply redundancy electric power system to above-mentioned.
Fig. 4 is the particular circuit configurations figure of the dual power supply redundancy electric power system of first embodiment of the invention, and wherein Fig. 4 further shows the particular circuit configurations that power switch-over control signal of the present invention produces circuit 20 on the basis of Fig. 3.
As shown in Figure 4, redundant power module 204 comprises the first bipolar tube D1 and the second bipolar tube D2, the anode of the first bipolar tube D1 is connected with main supply module 201, the negative electrode of the first bipolar tube D1 is connected with load 203, the anode of the second bipolar tube D2 with from supply module 202, be connected, the negative electrode of the second bipolar tube D2 is connected with the negative electrode of the first bipolar tube D1.
And refer to Fig. 5 and Fig. 6, and Fig. 5 is input voltage and the output voltage location diagram of bipolar tube, Fig. 6 is the input voltage V1 of bipolar tube and the difference of output voltage V 2 and the graph of relation of the current value passing through.
As shown in Figure 6, general bipolar tube has following transmission characteristic: the voltage difference V2-V1 between anode and negative electrode has certain corresponding relation with the electric current passing through, be embodied in, the current value passing through is larger, the voltage difference V2-V1 larger (the two is non-linear relation) between anode and negative electrode.Because above characteristic is the common feature of common bipolar tube, therefore the first bipolar tube D1 and the second bipolar tube D2 that in the present invention, adopt also have identical transmission characteristic, the present invention utilizes this transmission characteristic of bipolar tube to sample to main supply module 201 with from the electric current of supply module 202 outputs, to generate corresponding voltage signal.
For redundant power module 204, transmission characteristic from diode, the voltage proportion relation at the electric current He Qi two ends by diode, double diode Redundancy Design, utilized just this characteristic of diode, the size of current that two-way diode is passed through depends on the voltage swing (because two diodes have a pin to link together, so the size of the voltage difference at two diode two ends only depends on the input voltage of another pin) of its input.
If know main supply module 201 and from the input voltage value of supply module 202, and load 203 electric currents of dual power supply redundancy electric power system, just can calculate respectively the electric current that flows through two diodes according to the transfer curve of diode.Its final effect realizing is exactly: which diode input voltage is high, and the ratio that its electric current of sharing accounts for total current is just larger.
The Main Function of this design has two:
(a) realize the seamless switching of power supply (i.e. main supply module 201 and from supply module 202).
(b) current sampling (known according to the on state characteristic figure of diode, the electric current flowing through at it is that the voltage difference at certain value Shi，Qi two ends is also a corresponding value).
Referring again to Fig. 4, the first supply current Ia of main supply module 201 outputs can produce the voltage differential signal corresponding with its current value when flowing through the first bipolar tube D1 between the anode of the first bipolar tube D1 and negative electrode, and this voltage differential signal is the first above-mentioned voltage signal.In like manner, from the second supply current Ip of supply module 202 output, when flowing through the second bipolar tube D2, can between the anode of the second bipolar tube D2 and negative electrode, produce the voltage differential signal corresponding with its current value, this voltage differential signal is above-mentioned second voltage signal.Therefore, the first bipolar tube D1 can sample to produce the first voltage signal corresponding to the current value of the first supply current to the first supply current, and the second bipolar tube D2 can sample to produce the second voltage signal corresponding to the current value of the second supply current to the second supply current.
Please continue referring to Fig. 4, the first voltage amplification module 205 comprises a PNP triode Q1, the first resistance R 1 and the second resistance R 2, the base stage of the one PNP triode Q1 is connected with the negative electrode of the first bipolar tube D1, a described emitter of PNP triode Q1 and the anodic bonding of the first bipolar tube D1, the collector electrode of the one PNP triode Q1 is connected with one end of described the first resistance R 1, the other end of the first resistance R 1 is connected with one end of the second resistance R 2, the other end ground connection of the second resistance R 2, the other end of the first resistance R 1 is exported the first above-mentioned voltage amplification signal.
Second voltage amplification module 206 comprises the 2nd PNP triode Q2, the 3rd resistance R 3 and the 4th resistance R 4, the base stage of the 2nd PNP triode Q2 is connected with the negative electrode of the second bipolar tube D2, the 2nd emitter of PNP triode Q2 and the anodic bonding of the second bipolar tube D2, the collector electrode of the 2nd PNP triode Q2 is connected with one end of the 3rd resistance R 3, the other end of the 3rd resistance R 3 is connected with one end of the 4th resistance R 4, the other end ground connection of the 4th resistance R 4, wherein, the first resistance is identical with the resistance value of the 3rd resistance R 3, the second resistance is identical with the resistance value of described the 4th resistance R 4, the other end output second voltage amplifying signal of the 3rd resistance R 3.
Above-mentioned set-up mode has utilized the synchronous amplification characteristic of PNP triode to putting the first voltage signal between 1 and 2 and the second voltage signal of putting between 5 and 6 being amplified, and below will referring to Fig. 7, sketch the synchronous amplification characteristic of PNP triode.
And refer to Fig. 7, wherein Fig. 7 is the synchronous amplification characteristic schematic diagram of PNP triode.As shown in Figure 5, if the base stage input direct-current at PNP triode is biased to VDD, amplitude is that the input signal of Vc (is supposed the supply power voltage that VDD equals the main supply module 201 in the present invention or provides from supply module 202, Vc equals the conducting voltage of diode under maximum system load 203), at emitter input VDD, will obtain following at collector electrode that to change and be amplified to direct current biasing be VDD/2, the output signal that amplitude is VDD/2.
Therefore, the first voltage amplification module 205 described in Fig. 4 is utilized the synchronous amplification characteristic of a PNP triode Q1 just, with predetermined multiplication factor, described the first voltage signal is carried out to voltage amplification processing to produce the first voltage amplification signal, wherein, predetermined multiplication factor depends on the first resistance R 1 and the second resistance R 2, as shown in Figure 3, the first resistance R 1 and the second resistance R 2 series connection, to carry out dividing potential drop to amplifying the voltage of gained, guarantee exportable accurate the first voltage amplification signal.In like manner, the set-up mode of the set-up mode of second voltage amplification module 206 and the first voltage amplification module 205 is in full accord, and the first resistance R 1 is identical with the resistance value of the 3rd resistance R 3, the second resistance R 2 is identical with the resistance value of the 4th resistance R 4, consistent to guarantee the voltage amplification factor of the two, wherein, the other end of the 3rd resistance R 3 is exported above-mentioned second voltage amplifying signal.
Because the first voltage amplification module 205 and second voltage amplification module 206 are exactly in fact an amplifier, and utilization of the present invention is the simplest transistor amplifier, according to triode transmission characteristic, by 2 pin of the first triode and 1 pin difference voltage, amplify, and be transferred to the first resistance R 1 and the second resistance R 2 is carried out dividing potential drop, by 4 pin of the second triode and 5 pin difference voltage, amplify, and be transferred to the 3rd resistance R 3 and the 4th resistance R 4 is carried out dividing potential drop.Essence is exactly that the electric current by diode is synchronously converted to the voltage signal that meets system requirements.Its specific implementation is not limited to triode, also can adopt the other standards amplifier circuits such as amplifier to realize.
Refer to Fig. 4, division module 207 is carried out division arithmetic by the equivalent voltage of two-way Power supply electric current, and its ratio is converted to a magnitude of voltage, than threshold voltage, is about to second voltage amplifying signal and to produce, compares threshold voltage divided by the first voltage amplification signal.
And referring to Fig. 8, Fig. 8 is the electrical block diagram of division module 207.The equivalent effect of division module 207 is: the ratio threshold voltage=out1/out2*k(k of out3 output is the fixed coefficient that divider itself determines, is traditionally arranged to be 1).
Because this division module 207 is substantially general division circuits, its design itself is not core of the present invention, in this, do not repeat, also can replace with division circuit or the divider of other types, as long as it is functionally equivalent to the output voltage that the ratio of input voltage is converted into a unique correspondence.
Please continue referring to Fig. 4, comparison module 208 is made comparisons the threshold voltage Vret of this ratio equivalent voltage and default, to produce power switch-over control signal, load 203 is carried out to power consumption control.Wherein, this threshold voltage Vret for sharing the corresponding magnitude of voltage of ratio from supply module 202 and main supply module 201 under maximum load 203, that is, from the peak power output of supply module 202 with the maximum power dissipation of load 203 is deducted from the ratio of the peak power output gained difference of supply module 202.
Threshold voltage Vret has represented that load 203 is when maximum power dissipation, shares the voltage corresponding to ratio of its net capability from supply module 202.Such as: the maximum power dissipation of supposing load 203 is 20w, from the peak power output of supply module 202, be 13w, in order to guarantee under maximum power dissipation, from supply module 202, there is not overload, only need to guarantee that the load 203 of sharing from supply module 202 is no more than 13w, main supply module 201 is shared remaining 7w, so as long as meet: from supply module 202 power outputs/main supply module 201 power output < 13/7, even if load 203 is in maximum power dissipation, from supply module 202, also there will not be overload.The threshold voltage Vret is here equivalent to while powering according to 13/7 power proportions from supply module 202 and main supply module 201, the ratio threshold voltage of division module 207 outputs.
To sum up, just realized: when from supply module 202 and main supply module 201 load sharings 203 when being less than 13/7, power switch-over control signal is exported the second power switch-over control signal (high level signal 1, corresponding analog voltage is 3.3v), now without restriction load 203 power consumption, otherwise, export the first power switch-over control signal (low level signal 0, corresponding analog voltage is 0v), limiting system maximum power dissipation is 13w.
According to said system analysis.Suppose that load 203 maximum power dissipations are 20W, load 203 voltages are 12V, from the peak power output of supply module 202, be 13w, the peak power output of main supply module 201 is 20w, the maximum power dissipation of load 203 is 20w, load 203 electric currents=20w/12v=1.7A, that is: Ia+Ip=1.7A, from supply module 202 maximums, can carry power consumption is 13W, and the ratio of switching controls point is 13/7.In when normal operation, main supply module 201 preferentially power, and A point voltage is 12V, from supply module 202, is redundancy backup, and B point voltage is set as 11.5V, when adapter, powers and closes or during voltage drop, its each point effect actual waveform as shown in Figure 9.
As shown in Figure 9, Vmax is the maximum ratio voltage of divider output, V(13/7) for input current ratio is the output voltage after 13/7 o'clock corresponding diode voltage is changed by divider, Vref=V(13/7).And bearing power control module 209 is decreased to the power consumption of load 203 from the peak power output of supply module 202 when getting described the first power switch-over control signal 0V, when getting the second power switch-over control signal 3.3V, keep the power consumption of load 203 constant.Wherein, the concrete control mode that power consumption control is carried out in 209 pairs of loads of bearing power control module 203 is prior art, in this, does not repeat.
It should be noted that above-mentioned main supply module 201 is preferably adapter, is preferably Power over Ethernet module from supply module 202.
Please, with further reference to Figure 10, Figure 10 is according to the flow chart of the dual power supply redundancy method of supplying power to of second embodiment of the invention.As shown in figure 10, according to the dual power supply redundancy method of supplying power to of second embodiment of the invention, comprise the steps:
Step 301: main supply module is provided to the first supply current of load and samples to produce the first voltage signal corresponding to the current value of the first supply current, sample to produce the second voltage signal corresponding to the current value of the second supply current to providing from supply module to the second supply current of load.
Step 302: with predetermined multiplication factor, the first voltage signal is carried out to voltage amplification processing to produce the first voltage amplification signal, with predetermined multiplication factor, second voltage signal is carried out to voltage amplification processing to produce second voltage amplifying signal.
Step 303: second voltage amplifying signal is compared to threshold voltage divided by the first voltage amplification signal to produce.
Step 304: whether judgement is greater than threshold voltage than threshold voltage, if so, performs step 305, otherwise, perform step 306.Wherein, the magnitude of voltage of threshold voltage equal from the peak power output of supply module with the maximum power dissipation of load is deducted from the ratio of the peak power output gained difference of supply module.
Step 305: export the first power switch-over control signal.
Step 306: export the second power switch-over control signal.
Step 307: the power consumption of load is decreased to the peak power output from supply module according to the first power switch-over control signal.
Step 308: or keep the power consumption of load constant according to the second power switch-over control signal.
To sum up, the present invention has realized: in many power supply redundancys electric power system of asymmetric power consumption, carry out the design of system power dissipation control based on load current allocation proportion, realized the load power consumption of maximal efficiency and controlled.
And in, multi-power system unbalanced in power supply capacity, the ratio based on electric current load sharing is carried out system power dissipation control, maximizing utilize system power supply ability, reduce the Functional Capability waste that mistaken verdict brings.Handoff procedure is synchronized with the variation of supply voltage, can accurately control some switching time, accomplishes seamless control, avoids the load overload of pilot process.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. a dual power supply redundancy electric power system, it is characterized in that, comprise load, main supply module and from supply module, described main supply module provides the first supply current to described load, describedly from supply module, provide the second supply current to described load, the maximum power dissipation of described load is less than or equal to the peak power output of described main supply module, and is greater than the described peak power output from supply module, and described system further comprises:
Power switch-over control signal produces circuit, comprising:
Redundant power module, described the first supply current is sampled to produce the first voltage signal corresponding to the current value of described the first supply current, described the second supply current is sampled to produce the second voltage signal corresponding to the current value of described the second supply current;
The first voltage amplification module, carries out voltage amplification processing to produce the first voltage amplification signal with predetermined multiplication factor to described the first voltage signal;
Second voltage amplification module, carries out voltage amplification processing to produce second voltage amplifying signal with described predetermined multiplication factor to described second voltage signal;
Division module, compares threshold voltage divided by the first voltage amplification signal to produce by described second voltage amplifying signal;
Comparison module, by described, than threshold voltage and threshold voltage, compare, at the described first power switch-over control signal of exporting while being greater than described threshold voltage than threshold voltage, at the described second power switch-over control signal of exporting while being less than or equal to described threshold voltage than threshold voltage, wherein, the magnitude of voltage of described threshold voltage equals the described peak power output from supply module and the maximum power dissipation of described load is deducted from the ratio of the peak power output gained difference of supply module;
Bearing power control module, the power consumption of described load is decreased to the described peak power output from supply module when getting described the first power switch-over control signal, when getting described the second power switch-over control signal, keeps the power consumption of described load constant.
2. dual power supply redundancy electric power system according to claim 1, it is characterized in that, described redundant power module comprises the first bipolar tube and the second bipolar tube, the anode of described the first bipolar tube is connected with described main supply module, the negative electrode of described the first bipolar tube is connected with described load, the anode of described the second bipolar tube is connected from supply module with described, and the negative electrode of described the second bipolar tube is connected with the negative electrode of described the first bipolar tube.
3. dual power supply redundancy electric power system according to claim 2, it is characterized in that, described the first voltage amplification module comprises a PNP triode, the first resistance and the second resistance, the base stage of a described PNP triode is connected with the negative electrode of described the first bipolar tube, the anodic bonding of the emitter of a described PNP triode and described the first bipolar tube, the collector electrode of a described PNP triode is connected with one end of described the first resistance, the other end of described the first resistance is connected with one end of described the second resistance, the other end ground connection of described the second resistance, wherein, the other end of described the first resistance is exported described the first voltage amplification signal.
4. dual power supply redundancy electric power system according to claim 3, it is characterized in that, described second voltage amplification module comprises the 2nd PNP triode, the 3rd resistance and the 4th resistance, the base stage of described the 2nd PNP triode is connected with the negative electrode of described the second bipolar tube, the anodic bonding of the emitter of described the 2nd PNP triode and described the second bipolar tube, the collector electrode of described the 2nd PNP triode is connected with one end of described the 3rd resistance, the other end of described the 3rd resistance is connected with one end of described the 4th resistance, the other end ground connection of described the 4th resistance, wherein, described the first resistance is identical with the resistance value of described the 3rd resistance, described the second resistance is identical with the resistance value of described the 4th resistance, the other end of described the 3rd resistance is exported described second voltage amplifying signal.
5. power switch-over control signal produces a circuit, it is characterized in that, comprising:
Redundant power module, main supply module is provided to the first supply current of load and samples to produce the first voltage signal corresponding to the current value of described the first supply current, the second supply current providing from supply module is sampled to produce the second voltage signal corresponding to the current value of described the second supply current;
The first voltage amplification module, carries out voltage amplification processing to produce the first voltage amplification signal with predetermined multiplication factor to described the first voltage signal;
Second voltage amplification module, carries out voltage amplification processing to produce second voltage amplifying signal with described predetermined multiplication factor to described second voltage signal;
Division module, compares threshold voltage divided by the first voltage amplification signal to produce by described second voltage amplifying signal;
Comparison module, by described, than threshold voltage and threshold voltage, compare, at the described first power switch-over control signal of exporting while being greater than described threshold voltage than threshold voltage, at the described second power switch-over control signal of exporting while being less than or equal to described threshold voltage than threshold voltage, wherein, the magnitude of voltage of described threshold voltage equals the described peak power output from supply module and the maximum power dissipation of described load is deducted to the ratio of the described peak power output gained difference from supply module.
6. power switch-over control signal according to claim 5 produces circuit, it is characterized in that, described redundant power module comprises the first bipolar tube and the second bipolar tube, the anode of described the first bipolar tube is connected with described main supply module, the negative electrode of described the first bipolar tube is connected with described load, the anode of described the second bipolar tube is connected from supply module with described, and the negative electrode of described the second bipolar tube is connected with the negative electrode of described the first bipolar tube.
7. power switch-over control signal according to claim 6 produces circuit, it is characterized in that, described the first voltage amplification module comprises a PNP triode, the first resistance and the second resistance, the base stage of a described PNP triode is connected with the negative electrode of described the first bipolar tube, the anodic bonding of the emitter of a described PNP triode and described the first bipolar tube, the collector electrode of a described PNP triode is connected with one end of described the first resistance, the other end of described the first resistance is connected with one end of described the second resistance, the other end ground connection of described the second resistance, the other end of described the first resistance is exported described the first voltage amplification signal.
8. power switch-over control signal according to claim 7 produces circuit, it is characterized in that, described second voltage amplification module comprises the 2nd PNP triode, the 3rd resistance and the 4th resistance, the base stage of described the 2nd PNP triode is connected with the negative electrode of described the second bipolar tube, the anodic bonding of the emitter of described the 2nd PNP triode and described the second bipolar tube, the collector electrode of described the 2nd PNP triode is connected with one end of described the 3rd resistance, the other end of described the 3rd resistance is connected with one end of described the 4th resistance, the other end ground connection of described the 4th resistance, wherein, described the first resistance is identical with the resistance value of described the 3rd resistance, described the second resistance is identical with the resistance value of described the 4th resistance, the other end of described the 3rd resistance is exported described second voltage amplifying signal.
9. a dual power supply redundancy method of supplying power to, is characterized in that, comprises the following steps:
Main supply module is provided to the first supply current of load and samples to produce the first voltage signal corresponding to the current value of described the first supply current, to providing from supply module to the second supply current of described load, sample to produce the second voltage signal corresponding to the current value of described the second supply current;
With predetermined multiplication factor, described the first voltage signal is carried out to voltage amplification processing to produce the first voltage amplification signal, with described predetermined multiplication factor, described second voltage signal is carried out to voltage amplification processing to produce second voltage amplifying signal;
Described second voltage amplifying signal is compared to threshold voltage divided by the first voltage amplification signal to produce;
By described, than threshold voltage and threshold voltage, compare, at the described first power switch-over control signal of exporting while being greater than described threshold voltage than threshold voltage, at the described second power switch-over control signal of exporting while being less than or equal to described threshold voltage than threshold voltage, wherein, the magnitude of voltage of described threshold voltage equals the described peak power output from supply module and the maximum power dissipation of described load is deducted to the ratio of the described peak power output gained difference from supply module;
According to described the first power switch-over control signal, the power consumption of described load is decreased to the described peak power output from supply module, or keeps the power consumption of described load constant according to described the second power switch-over control signal.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106060687A (en) * | 2016-06-08 | 2016-10-26 | 钰太芯微电子科技（上海）有限公司 | Multi-mode microphone power supply system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1476140A (en) * | 2002-08-15 | 2004-02-18 | 冉茂鑫 | Bi non interrupted switch power supply rebudance output method and its system |
| CN1674404A (en) * | 2004-03-25 | 2005-09-28 | 联想(北京)有限公司 | Redundant electric power system |
-
2012
- 2012-06-26 CN CN201210213258.0A patent/CN103516043B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1476140A (en) * | 2002-08-15 | 2004-02-18 | 冉茂鑫 | Bi non interrupted switch power supply rebudance output method and its system |
| CN1674404A (en) * | 2004-03-25 | 2005-09-28 | 联想(北京)有限公司 | Redundant electric power system |
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|---|---|---|---|---|
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| CN106060687B (en) * | 2016-06-08 | 2024-05-17 | 钰太芯微电子科技（上海）有限公司 | Multi-mode microphone power supply system |
| CN108321915A (en) * | 2017-01-16 | 2018-07-24 | 宏碁股份有限公司 | The operating method of electronic device and electronic device |
| CN108321915B (en) * | 2017-01-16 | 2020-08-04 | 宏碁股份有限公司 | Electronic device and operation method thereof |
| CN110323818A (en) * | 2018-03-30 | 2019-10-11 | 加百裕工业股份有限公司 | Batteries in parallel connection system and method |
| US11455973B2 (en) | 2019-05-24 | 2022-09-27 | Beijing Boe Technology Development Co., Ltd. | Programmable logic device-based data processing apparatus and driving method therefor, and display apparatus |
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| CN114465831B (en) * | 2020-11-10 | 2023-05-16 | 启碁科技股份有限公司 | Power over Ethernet device |
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