CN204481706U - The power supply change-over device of being powered by Rectified alternating current - Google Patents

The power supply change-over device of being powered by Rectified alternating current Download PDF

Info

Publication number
CN204481706U
CN204481706U CN201420724425.2U CN201420724425U CN204481706U CN 204481706 U CN204481706 U CN 204481706U CN 201420724425 U CN201420724425 U CN 201420724425U CN 204481706 U CN204481706 U CN 204481706U
Authority
CN
China
Prior art keywords
voltage
switch
alternating current
circuit
switch element
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.)
Withdrawn - After Issue
Application number
CN201420724425.2U
Other languages
Chinese (zh)
Inventor
徐运哲
其他发明人请求不公开姓名
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201420724425.2U priority Critical patent/CN204481706U/en
Application granted granted Critical
Publication of CN204481706U publication Critical patent/CN204481706U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The utility model discloses the power supply change-over device of being powered by Rectified alternating current.Rectified alternating current has first, second end; First switch first end is connected with Rectified alternating current first end; Second switch first end is connected with Rectified alternating current first end; Storage capacitor first end is connected with second switch second end, and the second end is connected with Rectified alternating current second end; 3rd switch first end is connected with storage capacitor first end, and the second end is connected with the first switch second end; Control unit has some signal output parts, connects first, second, and third switch control terminal respectively, controls its turn-on and turn-off respectively; Output unit at least has two inputs, and first end is connected with the 3rd switch second end, and the second end is connected with Rectified alternating current second end.Smothing filtering electric capacity need not be used Rectified alternating current can be converted to various power supply, thus reduced volume, improving SNR, improve reliability, and be easy to integrated.

Description

The power supply change-over device of being powered by Rectified alternating current
Technical field
The utility model belongs to power supply changeover device field, is related specifically to the power supply change-over device of being powered by Rectified alternating current.
Background technology
Most of electronic apparatus and electric equipment use alternating current as its power supply source, but the interior arrangement of in fact many electrical equipment and equipment cannot directly utilize alternating current work, in most cases need first to convert alternating current to Rectified alternating current by rectification circuit, then Rectified alternating current is converted to the various power supplys required for them by power supply change-over device.
Because the voltage fluctuation amplitude of Rectified alternating current is excessive, power supply change-over device is often caused to be difficult to normal work.Therefore, the scope of this voltage fluctuation must be made to be reduced in acceptable scope.The solution of prior art is, places a jumbo capacitor at the voltage two ends of Rectified alternating current, as cheap, electrolytic capacitor capacious, because its role is smothing filtering, therefore is often referred to as smothing filtering electric capacity.Such as, shown in Figure 1A, Figure 1B and Fig. 1 C is exactly basic structure after the common AC-DC power supply transducer of several embodiment prior art simplifies, after using smothing filtering electric capacity, DC-to-DC change-over circuit is able to normal work, can provide lasting, stable out-put supply.
But the existence of above-mentioned Large Copacity smoothing capacitor, also brings many problems, as volume increase, cost increases, electric current harmonic distortion is large on excessive, the power supply grid of booting moment surge current, power factor (PF) is too low, electromagnetic interference is large.When high temperature, electrolytic capacitor also can burst because of performance degradation, makes overall performance deterioration, reliability reduces, the lost of life, and bring potential safety hazard.Therefore, avoid using Large Copacity smoothing capacitor, eliminate or alleviate above problem, to the performance improving power supply change-over device and AC network, having important practical significance.
Utility model content
In view of this, the technical problems to be solved in the utility model is: provide a kind of power supply change-over device, need not use jumbo smoothing capacitor, just Rectified alternating current can be converted to required various power supplys.Thus, the above-mentioned various technical problem existed in prior art can be made to be greatly improved.The above-mentioned power supply converted by Rectified alternating current can be the DC power supply that a kind of voltage fluctuation amplitude is less, also can be stable out-put supply.Wherein, stable out-put supply refers to: have one group of output at least, and its voltage exported or electric current or power are in the allowed band of system nominal under certain condition, and embody metastable characteristic within a certain period of time.Technical scheme is as follows:
Powered by Rectified alternating current and carry out the device of Power convert output, comprising: Rectified alternating current, as input power, there is first end, the second end; First switch element (05), have first end, the second end and control end, its first end is connected with the first end of this Rectified alternating current; Second switch element (06), have first end, the second end and control end, its first end is connected with the first end of this Rectified alternating current; Energy storage capacitor (04), has first end, the second end, and its first end is connected with the second end of this second switch element (06), and its second end is connected with the second end of this Rectified alternating current; 3rd switch element (07), have first end, the second end and control end, its first end is connected with the first end of this energy storage capacitor (04), and its second end is connected with the second end of this first switch element (05); Control circuit (32), there is several control signal outputs, be connected with the control end of the 3rd switch element (07), for controlling its turn-on and turn-off respectively with this first switch element (05), this second switch element (06) respectively; Output unit (08), export for providing the power supply through conversion to load or late-class circuit, at least there is first end and the second end as two inputs, its first end is connected with the second end of the 3rd switch element (07), and its second end is connected with the second end of this Rectified alternating current.
The first end of this Rectified alternating current is power cathode, the second end is positive source, and the first end of described each switch element and the second end are output and the input of electric current respectively.Preferably, the first end of this Rectified alternating current is positive source, the second end is power cathode, and the first end of described each switch element and the second end are input and the output of electric current respectively.
This control circuit (32) comprises voltage comparator circuit (92) and signal switching circuit (91), the voltage at Rectified alternating current and this energy storage capacitor (04) two ends is compared in real time with setting voltage respectively, obtain the signal for controlling above-mentioned each switching elements conductive and shutoff, thus make the input two ends of this output unit (08) obtain through conversion voltage.
The effect of this control circuit (32) is, when the voltage of this Rectified alternating current is higher than this energy storage capacitor (04) both end voltage, controls this second switch element (06) conducting and make this Rectified alternating current to this energy storage capacitor (04) charging energy-storing; When this pulsating direct current piezoelectric voltage is lower than this energy storage capacitor (04) both end voltage, above-mentioned charging process stops.This second switch element (06) is field-effect transistor or transistor, or other switching components suitable with it; Preferably, this second switch element (06) is diode, and need not be connected with the control end of this control circuit (32), now this control circuit (08) is as long as minimum have two control signal outputs, is connected respectively with the control end of this first switch element (05) with the 3rd switch element (07).
When this pulsating direct current piezoelectric voltage is higher, this output unit (08) obtains voltage via this first switch element (05) of controlled conducting from these Rectified alternating current two ends; When this pulsating direct current piezoelectric voltage is lower, this output unit (08) obtains voltage via the 3rd switch element (07) of controlled conducting from this energy storage capacitor (04) two ends.
This output unit (08) is a port for being electrically connected, is exported by direct current power source voltage less for fluctuating range scope by this connectivity port.
Preferably, this output unit (08) is a power conversion unit, and comprise output port, obtain electric energy by the voltage at this power conversion unit (08) input two ends and by its internal circuit, input electric energy be converted to stable out-put supply; This control circuit (32) also comprises feedback control circuit (93).Wherein, this control circuit (32) is according to the instantaneous voltage of this Rectified alternating current, and utilize negative feedback control principle, this coupled first switch element (05) and the 3rd switch element (07) are carried out to the control of on off state and conduction mode, finally form stable out-put supply at the output of this power conversion unit (08).
Preferably, this first switch element (05) and the 3rd switch element (07) alternation, at linear conduction mode or off state, form stable out-put supply at the input of output unit (08) or the output of power conversion unit (08).
Preferably, this first switch element (05) and the 3rd switch element (07) alternation are at high frequency switch-mode or off state, form high-frequency pulse voltage at the input two ends of output unit (08), and form stable out-put supply at the output of power conversion unit (08).
The circuit utilizing the utility model to disclose and device, by existing process means convenience, be integrated in semiconductor integrated circuit and circuit module at low cost, basic elimination or the various problems greatly alleviated because using Large Copacity smoothing capacitor to bring in prior art, and improving SNR, reduced volume, reduces costs.
Accompanying drawing explanation
The following drawings describes embodiment and the example of not restricted and non-exclusive of the present utility model.Wherein, except as otherwise noted, in the accompanying drawing that each are different, the parts with same numbers label have identical attribute; For the multiple different concrete manifestation form that the parts with same numbers label have, then distinguished as suffix with English alphabet again.Such as, in each accompanying drawing, all parts 05 have identical attribute, are all refer to a kind of switch element; In each accompanying drawing, all parts 05A, as a kind of concrete manifestation form of parts 05, also have identical attribute, are all the transistor units referring to NPN type; In each accompanying drawing, parts 05B is another concrete form of parts 05, also all has identical attribute, is all MOS field-effect transistor (MOS-FET) element referring to N-type.
Figure 1A is an exemplary circuit configuration figure of prior art, is the AC-DC converter of switching mode isolated form inverse-excitation type.
Figure 1B is an exemplary circuit configuration figure of prior art, is the AC-DC converter of switching mode non-isolation type buck.
Fig. 1 C is an exemplary circuit configuration figure of prior art, is the AC-DC converter of linear model buck.
Fig. 2 is an embodiment of the present utility model, the general frame of the power supply change-over device of being powered by Rectified alternating current.
Fig. 3 is a specific embodiment based on Fig. 2, Rectified alternating current is converted to the circuit diagram of the device of stable out-put supply.
Fig. 4 is the corresponding supply voltage of each specific embodiment and the waveform of control signal and timing diagram.
Fig. 5 is the more specific embodiment based on Fig. 3 embodiment, is a kind of step-down type dc stabilized voltage power supply of linear model.
Fig. 6 is the more specific embodiment based on Fig. 3 embodiment, is that out-put supply stablized by a kind of switch of isolated form inverse-excitation type.
Fig. 7 is the refinement embodiment based on Fig. 3 and Fig. 6 embodiment, is that out-put supply stablized by a kind of switch of isolated form inverse-excitation type.
Fig. 8 is the pre-ferred embodiment based on Fig. 3 embodiment, is a kind of switch DC power supply of non-isolation type voltage-dropping type.
Fig. 9 is the refinement embodiment based on Fig. 3 and Fig. 8 embodiment, is a kind of switch DC constant-current supply of non-isolation type.
Figure 10 is the refinement embodiment based on Fig. 3 and Fig. 9 embodiment, is a kind of DC constant flowing power being applicable to semiconductor lighting of non-isolation type.
Figure 11 is the refinement embodiment based on Fig. 3 embodiment, is a kind of Switching Power Supply of isolated form semibridge system.
Figure 12 is the refinement embodiment based on Fig. 3 embodiment, is a kind of Switching Power Supply of isolated form full-bridge type.
Figure 13 is the another embodiment based on Fig. 3 embodiment, is a kind of Switching Power Supply of push-pull type structure.
Figure 14 is an embodiment based on Fig. 2, Rectified alternating current is converted to the circuit diagram of the device of stable out-put supply.
Figure 15 is the more specific embodiment based on Figure 14, is that out-put supply stablized by a kind of switch of isolated form inverse-excitation type.
Figure 16 is the specific embodiment based on Figure 13, is that out-put supply stablized by a kind of switch of isolated form inverse-excitation type.
Embodiment
For ease of have the utility model clearly with thorough understanding, set forth many specific details by following content.But, to those skilled in the art it is apparent that implement the utility model to need not be confined to these specific details.For avoiding fuzzy main contents of the present utility model, well-known knowledge, principle and device are not elaborated.In this specification, so-called " embodiment ", " embodiment " or the implication of " embodiment " are that the specific features that this embodiment describes, structure or characteristic are included at least one embodiment of the present utility model.Therefore, these phrases that in full text, many places occur may not refer to identical embodiment.In addition, specific features, structure or characteristic can combine with any suitable combination and/or sub-portfolio in one or more embodiments; Specific features, structure or characteristic can be included in functional electronic circuit, integrated circuit, combinational logic circuit, modular circuit and other the suitable parts providing described.In addition, also it should be understood that the accompanying drawing provided at this is the object for explaining to those skilled in the art, and these figure also may not draw in proportion.
In this specification, employ some technical terms.These terms have expressed their its ordinary meaning in the art, unless here special definition, or their linguistic context of using have clearly illustrated that and refer else.Such as, term "and/or" contains two kinds of possible situations, a kind of available " with " express, another kind can be expressed by "or"; " switch element " refers under control signal effect, has the components and parts of " conducting " and " shutoff " two kinds of on off states (also known as conducting state), has again complete conducting, the linear conduction mode such as conducting, HF switch switching when its conducting; For another example, " power supply " refers to the source of supply providing electric power, or voltage source, current source or supply unit; And " stabilized power supply " is relative concept, represents that its output variable (voltage or electric current or power) is in the allowed band of system nominal under certain condition, and embody metastable characteristic in certain hour (section).Below all its ordinary meaning is belonged to, unless linguistic context has clearly shown separately have implication.
Before elaboration the utility model, first investigating the circuit structure of the AC-DC converter as shown in Figure 1A based on prior art, contributing to the understanding to having more complete display in of the present utility model.For the ease of setting forth, this transducer can be interpreted as and include 3 funtion parts: full-wave rectifying circuit 01A, smoothing capacitor 02 and power transimission unit 08H, wherein the latter also comprises switch element 08H4 and feedback control circuit 08H5.As everyone knows, periodic alternating current is converted to Rectified alternating current VDC by full-wave rectifying circuit 01A, the capacitance of smoothing capacitor 02 is enough large, be used for providing lasting electric power to subsequent conditioning circuit, when alternating current voltage declines, due to the energy storage effect of smoothing capacitor 02, its fluctuating range can be made to control in less scope and guarantee that its subsequent conditioning circuit still can export more stable power supply, power transimission unit 08H adopts the inverse-excitation type switch power-supply structure of isolated form, feedback control circuit 08H5 utilizes principle and the mechanism of feedback loop and FEEDBACK CONTROL, produce and dynamic conditioning PWM (or similar signal is as PFM etc., lower with) pulse duration (and/or duty ratio, lower same), driving switch element 08H4 makes HF switch and switches (high frequency switches between turn-on and turn-off two states), Rectified alternating current is converted to the input two ends that potential pulse is applied to transformer 08H1, again by rectifier diode 08H2 and through the filter action of filter capacitor 08H3, required stable dc power supply is formed at OUT output.
Wherein, alternating current input power supplying VAC forms Rectified alternating current VDC after rectification between V+ and V-, and its fluctuation voltage maximum is the crest voltage of AC power, and minimum value only 0 volt.When not having smoothing capacitor 02, when VDC voltage drops to very low, power transimission unit 08H cannot maintain normal output because not having sufficiently high input voltage, and the voltage being difficult to maintain stable at OUT two ends exports or electric current exports.After arranging smothing filtering electric capacity 02, the fluctuation range of VDC is compressed, and its magnitude of voltage remains enough high, makes power transimission unit 08H can output to OUT two ends by stable for electric power continuous.
As everyone knows, as shown in Figure 1A be the circuit overall structure of the switching mode AC-DC converter of a conventional inverse-excitation type.Feedback control circuit 08H5 in figure is the control centre of this transducer, its circuit common structure as shown in FIG., this circuit is to voltage (or the electric current from output OUT, down together) value samples, this magnitude of voltage is compared with target voltage values and (usually its branch pressure voltage is compared with reference voltage V ref, lower with) and for regulating pulse duration (or the duty ratio of PWM after carrying out error amplification, lower same) thus the voltage of control output, form a closed feedback loop, negative feedback control mechanisms thus, the size of output voltage is adjusted in desired value the most at last, coating-forming voltage galvanic current source.
Existing knowledge and technology discloses, when using output voltage with target voltage values as the object compared with FEEDBACK CONTROL time, this device provides D.C. regulated power supply; When using output current with target current value as the object compared with FEEDBACK CONTROL time, this device provides DC constant flowing power; Sometimes also using power output with target power value as comparing and FEEDBACK CONTROL object, then this device provides firm power power supply.In addition, only need add in the rear class at OUT two ends the device controlling to export positive-negative polarity again, the transducer shown in Figure 1A just can the voltage (or electric current) of output AC, namely certain form alternating current steady voltage plug or exchange constant-current supply.For simplified illustration, by above-mentioned " D.C. regulated power supply ", " DC constant flowing power ", " alternating current steady voltage plug ", " interchange constant-current supply " and the device with constant output, " stablizing out-put supply " this general designation is all used to refer to its any one.These power supply types all can be used as the utility model and are suitable for and the object implemented and category.The principle disclosed in conjunction with the utility model and device, by replacing smoothing capacitor 02 of the prior art, just can reach the purpose of this utility model.
For simplified characterization, first define a noun " power transimission unit ", it is as a kind of form of output unit 08, mean the circuit structure with certain form, at least containing one group of output, can independently or with other circuit match, by the Power convert of its input for stablize out-put supply.In prior art, power transimission unit 08 has abundant circuit form, and often kind of form also changes various, the just wherein a kind of form of the power transimission unit 08H shown in Figure 1A.In addition, shown in Figure 1B is another kind of common switch DC power supply in prior art, for simplifying follow-up explanation, regards switch element 16 and feedback control circuit 26 as parts outside power transimission unit 08B here.Its principle is summarized as follows: under the effect of feedback control circuit 26, make switch element 16 make HF switch to switch, the voltage at capacitor 02 two ends is applied to A, B end of power transimission unit 08B with pulse modulation voltage (as PWM), forms pulse current and be delivered to filtering capacitor 08B3 and output OUT through inductance 08B2.Wherein, when switch element 16 is turned off, diode 08B1 afterflow, OUT two ends still comparatively can be stablized lasting power supply and be exported.In prior art, this circuit structure is also usually used in the stable out-put supply of other form.For another example, shown in Fig. 1 C is a kind of common linear DC power supply in prior art.Its principle is summarized as follows: the feedback control circuit 27 in figure forms primarily of error amplifier, error voltage (analog signal) is obtained by being compared with target voltage by the voltage of OUT output, be used for the base stage of control switch 16 after being amplified by this error voltage, therefore switch 16 is in the linear conduction mode of part conducting all the time.When output voltage is higher, base signal reduces, and output voltage is reduced, and vice versa.By this degenerative principle and mechanism, OUT two ends form the out-put supply of voltage stabilization.
It should be noted that, principle, physical circuit and the device of above fluctuation signal detection, voltage comparator use, negative feedback control circuit, signal switching, switch element Driving technique etc., though comprise implementation detail, but existing a large amount of general knowledge is that the art is generally known, for simplified illustration also outstanding core element of the present utility model, therefore be elaborated no longer in the text.Below in conjunction with explanation and the contrast of above circuit, introduce the technical solution of the utility model and embodiment in detail.
The purpose of this utility model is to provide a kind of circuit topological structure and device thereof, smoothing capacitor need not be used, by the storage capacitor of several switch element and a low capacity, under control circuit effect, just Rectified alternating current can be converted to the less DC power supply of ripple amplitude to export, particularly utilize the change-over circuit in power transimission unit 08 it to be converted to lasting stable out-put supply, solve problems of the prior art.As long as do simple transformation, adaptive and/or fine setting in the converter circuitry of power of existing various structure and type, just the utility model can be implemented.
As an embodiment of the present utility model, an overall construction drawing of a kind of circuit topological structure and device thereof as disclosed in Fig. 2.Can see, with regard to the part on the right of this device straight dashed line, be equivalent to the part on the right of the straight dashed line shown in Figure 1A, and in position with use quite.Identical, both inputs are all Rectified alternating current VDC; Difference is, cast out the smoothing capacitor 02 in Figure 1A in the present embodiment, and replaced by following functional part: the energy storage capacitor 04 that switch element (hereinafter referred to as " switch ") 05, switch 06, switch 07, capacity are less and control circuit 32.Wherein, control circuit 32 at least has following functions: realize pulsation monitoring function by voltage comparator circuit, can monitor the voltage of Rectified alternating current and the magnitude of voltage at energy storage capacitor 04 two ends; Realize switching control function by commutation circuit, the on off state of the control end of the first switch 05, second switch 06 and the 3rd switch 07 can be controlled according to the voltage fluctuation situation of above-mentioned Rectified alternating current (utilizing the output of comparison circuit).Thus, electric energy can be obtained at the input port of power transimission unit 08, export to other various circuit by power transimission unit 08.
Below for convenience of describing, the above-mentioned voltage comparator circuit for monitoring fluctuation voltage instantaneous value being called " pulsation observation circuit 92 ", the above-mentioned signal switching circuit for controlling each switch is called " control switching circuit 91 ".Certainly, do not need in side circuit by such restriction, concrete implementation is also varied.Wherein, pulsation observation circuit 92 comprises voltage comparator circuit, the voltage of Rectified alternating current is compared in real time with setting voltage value, there is provided comparison signal to control switching circuit 91 to control the control end (signal corresponding respectively in figure is X1, X3, X2) of the first switch 05, second switch 06 and the 3rd switch 07, thus control on off state (conducting or shutoff) and the conduction mode (linear conducting, conducting completely, HF switch switch) of these switches respectively; In addition, the power transimission unit 08H of the particular form in Figure 1A, also replace by the output unit 08 without particular form, because the version of its concrete implementing circuit is various, can be used in embodiment of the present utility model.In enforcement, when conversion efficiency, switch element working condition allow, though do not recommend but still allow the electric capacity that capacity in parallel is less at the two ends of Rectified alternating current VDC, the EMI filter capacitor 031 in figure is such, and still can reach the purpose of this utility model.
As another embodiment of the present utility model, the device disclosed as Fig. 2 also has other application.Can see, with regard to the part on the right of this device straight dashed line, be equivalent to again the part on the right of the straight dashed line shown in Figure 1B, and in position with use quite.Identical, the input of two devices is all Rectified alternating current VDC; Unlike, cast out the smoothing capacitor 02 in Figure 1B, switch 16 and feedback control circuit 26 in the present embodiment, and replaced by following functional part: switch 05, switch 06, switch 07, energy storage capacitor 04, pulsation observation circuit 92, control switching circuit 91 and feedback control circuit 93.With a upper embodiment unlike, control circuit 32 comprises feedback control circuit, and the feedback control circuit 26 of its function and Figure 1B is suitable.For simplified characterization, in Fig. 2, suppose that this feedback control function is provided by feedback control circuit 93.This embodiment shows, when replacing smoothing capacitor 02, the new parts such as switch 05, switch 07 can have the function and efficacy of the switch element 16 be originally included in power transimission unit 08B concurrently, thus pass through the execution mode of " merge and integrate ", simplify implementing circuit, reduce costs and improve performance.Therefore, this embodiment is easy to carry out transformation and upgrade to existing power-switching circuit, contains larger value and significance.
Switch element in above embodiment, be widely used in the prior art, usually have three terminals, in this full text, according to sense of current, be called input (electric current inflow), output (outflow of bus current) and the control end for control switch state.Such as, for NPN transistor, input, output and control end are respectively collector electrode, emitter, base stage; For PNP transistor, input, output and control end are respectively emitter, collector electrode, base stage; For N-type MOS-FET and field-effect transistor, input, output and control end are respectively drain electrode, source electrode, grid; For P type MOS-FET, input, output and control end are respectively source electrode, drain electrode, grid.All the other are in like manner analogized.Concrete announcement will be done with accompanying drawing in conjunction with specific embodiments in length subsequently.For simplified characterization, when not doing concrete differentiation to the sense of current, do not distinguish input or the output of switch, only by first end or the second end in addition appellation; Also be like this to the terminal of energy storage capacitor 04, Rectified alternating current VDC and power transimission unit 08.
In Figure 1A, Figure 1B and Fig. 1 C, Rectified alternating current VDC is obtained after transformation, rectification by alternating current, and this is the most general, the typical applicable cases of a kind of application.In the diagram, the voltage waveform of the Rectified alternating current VDC after full-wave rectification of the voltage waveform of alternating current VAC, its correspondence is illustrated.
Should recognize, the above-described embodiment disclosed in Fig. 2 is not only applicable to the Rectified alternating current being derived from alternating current, and being also applicable to have voltage amplitude is that the Rectified alternating current of the other types of cyclic fluctuation feature is as its input power.Rectified alternating current VDC two ends in fig. 2, namely between Va and Vb, though allow need not shunt capacitor, thus its voltage fluctuation amplitude both can be very little, also can be very large, and cyclic fluctuation between 0 volt and the crest voltage of AC power.Understand that those skilled in the art of the utility model main points are clear, such Rectified alternating current VDC can have multiple different source: such as, has plenty of and is obtained through transformation, full-wave rectification by the alternating current of electrical network; Have plenty of and obtained through transformation, halfwave rectifier by the alternating current of electrical network; Some voltage peaks can reach hundreds of, Shuo Qianfu, tens of, the even a few volt of being only of having.Though have from other devices, be also periodically, voltage amplitude is the direct current of fluctuating characteristic, as square wave, triangular wave, trapezoidal wave or certain property irregular cycle waveform etc.; Some voltage fluctuation amplitudes are very large, fluctuation between 0 volt and crest voltage; Some voltage fluctuation amplitudes are less, only fuctuation within a narrow range between certain voltage and crest voltage; What have has carried out filtering through electromagnetic interference (EMI) rejects trap (typical case is made up of L, C, R); Have at Rectified alternating current VDC two ends, namely between Va and Vb, at least one capacitor in parallel, etc.Similar situation is more than that, due to the DC power supply of its common ground to be voltage amplitude be cyclic fluctuation, this in full in unifiedly to refer to " Rectified alternating current ", also illustrate that they can be applicable to each embodiment in literary composition.In addition, " periodically " mentioned here, under should being understood to be in the condition of not influential system requirement, its cycle time, place kept relative stability within limits.
Below principle of the present utility model is further set forth.
As in Fig. 2, the voltage difference between two terminal Va and Vb of Rectified alternating current VDC is VDC.During concrete enforcement, can Va end be positive pole, Vb end be negative pole, and this specification for this kind of situation, will do more elaboration; Also can Vb end be positive pole, Va end be negative pole, and this specification only does concise and to the point elaboration to this situation.Reason is that both are closely similar, and only in the specific implementation, for the concrete connection of the associated terminal of switch 05, switch 06, switch 07 and power transimission unit 08, the direction need flow through according to electric current adjusts to some extent, and adjustment is regular governed.
As an embodiment, Va end is positive pole, and Vb end is negative pole, VDC=Va-Vb.Under the effect of control switching circuit 91, the voltage at VDC two ends be in ascent stage and higher than this energy storage capacitor 04 both end voltage time, according to associated control signal this moment, switch 06 conducting, electric current returns Vb through switch 06 to the unidirectional charging of energy storage capacitor 04 from Va end, the voltage at energy storage capacitor 04 two ends reach VDC peak value no longer rise time, switch 06 turns off, and this charging process is supspended; Under the effect of pulse observation circuit 92 and control switching circuit 91, when the voltage rise of VDC is to during higher than certain setting voltage value Vset2, according to associated control signal this moment, switch 05 conducting also makes electric current send into power transimission unit 08 from Va end and return Vb end; When the voltage of VDC constantly drops to lower than certain setting voltage Vset1, according to associated control signal this moment, switch 07 conducting also makes electric current send into power transimission unit 08 from the anode Vc of energy storage capacitor 04 and return Vb end, therefore power transimission unit 08 still can obtain constant current source; This process is continued until that the cycle period of a new round starts, now VDC again starts to rise and charges to energy storage capacitor 04, repeat the same action in the above process in the last pulsation period of VDC, constantly move in circles, finally make power transimission unit 08 obtain constant current source.In paragraph after a while, a series of accompanying drawings such as composition graphs 3 are disclosed the further embodiment of the present embodiment, and is described in detail.
As another embodiment, Vb end is positive pole, and Va end is negative pole, VDC=Vb-Va, under the effect of control switching circuit 91, the voltage at VDC two ends be in ascent stage and higher than this energy storage capacitor 04 both end voltage time, according to associated control signal this moment, switch 06 conducting, electric current is held to the unidirectional charging of energy storage capacitor 04 from Vb and is returned Va through switch 06, the voltage at energy storage capacitor 04 two ends reach VDC peak value no longer rise time, switch 06 turns off, and this charging process is supspended; Under the effect of pulse observation circuit 92 and control switching circuit 91, when the voltage rise of VDC is to during higher than certain setting voltage value Vset2, according to associated control signal this moment, switch 05 conducting also makes electric current send into power transimission unit 08 from Vb end and return Va end; When the voltage of VDC constantly drops to lower than certain setting voltage Vset1, according to associated control signal this moment, switch 07 conducting also makes electric current send into power transimission unit 08 from Vb end and return the negative terminal Vc of energy storage capacitor 04, therefore power transimission unit 08 still can obtain constant current source; This process is continued until that the cycle period of a new round starts, now VDC again starts to rise and charges to energy storage capacitor 04, repeat the same action in the above process in the last pulsation period of VDC, constantly move in circles, finally make power transimission unit 08 obtain constant current source.In paragraph after a while, the further embodiment of the present embodiment will be disclosed in conjunction with several accompanying drawings such as Figure 14, and make brief description.
When it will be appreciated that above-described embodiment breaker in middle 05 and switch 07 conducting, be all suitable for 3 kinds of patterns (complete conducting, linear conducting, HF switch switch).Wherein, under HF switch switch mode, the electric current flowing through these two switches is pulse current.In addition also it should be noted that, in switch 07 conduction period, if switch 05 is in off state, would not by the voltage at capacitor 04 two ends (now higher) through switch 07 with switch 05 is counter delivers to Va and Vb two ends; Otherwise, switch 07 conduction period, if switch 05 also conducting, consider that the saltus step of Va and Vb both end voltage is on the pulsation monitoring function interference that may cause and impact, likely make pulsation observation process be tending towards complicated, also may bring certain energy loss.Therefore, the preferred version of above-mentioned two kinds of switching controls is: during switch 07 controlled conducting, and switch 05 turns off completely; During switch 05 controlled conducting, switch 07 turns off completely.
Because the utility model is not containing smothing filtering electric capacity 02, therefore requires that setting voltage Vset1 is a less magnitude of voltage, thus allow the capacity of energy storage capacitor 04 little as far as possible.Be understood that, between setting voltage Vset1 and setting voltage Vset2, several relation can be had: the first situation Vset1 > Vset2, the second situation Vset1=Vset2, the third situation Vset1 < Vset2.With setting voltage Vset1 unlike, concerning setting voltage Vset2, generally there is larger flexibility, can according to the requirement of system, as the scope range of the fluctuation of voltage, bearing power, power factor (PF) etc. of Rectified alternating current VDC, carry out concrete, design targetedly.In some cases, as an embodiment, even above-mentioned setting voltage Vset2 can be set as simply the crest voltage Vm close to equaling Rectified alternating current VDC, like this, power transimission unit 08 as far as possible early can obtain higher input voltage at Rectified alternating current VDC ascent stage; As another embodiment, also simply can be set to Vset1=Vset2, such setting voltage value only needs 1, can simplified design, in the example in the drawings, also embodies such execution mode.In a word, as long as meet the designing requirement of system, above-mentioned three kinds of situations can as embodiment of the present utility model.For simplified characterization, in following elaboration, no longer the magnitude relationship segmentation of setting voltage Vset1 and Vset2 is discussed, and better simply situation may be selected to be used for embodiment is described.
So far, that above two embodiments are provided, a kind of powered by Rectified alternating current and carry out the device of Power convert output, its general principle can merge and is summarized as follows: this Rectified alternating current VDC both end voltage compared in real time with several setting voltage values (as Vset1, Vset2) respectively, VDC voltage be in ascent stage and higher than energy storage capacitor 04 both end voltage time, switch 06 conducting also carries out charging energy-storing to energy storage capacitor 04, and after charge rest, switch 06 turns off; In VDC voltage rise to during higher than certain setting voltage value (as Vset2), switch 05 conducting, this power transimission unit 08 directly obtains supply power voltage from VDC two ends; At VDC voltage drop to during lower than certain setting voltage value (as Vset1), switch 07 conducting, makes this power transimission unit 08 can obtain supply power voltage from energy storage capacitor 04 two ends; After VDC voltage restarts rising, start new round circulation, repeat above process, the cycle so with VDC alternately constantly circulates, and obtains continuing power and is input to power transimission unit 08; The turn-on and turn-off of switch 05, switch 06 and switch 07, are controlled by the switch-over control signal that control switching circuit 91 generates according to each moment coherent signal that pulsation observation circuit 92 provides.
In above embodiment, under the dynamic adjustments of control signal, as long as carry out the control of voltage or electric current to the control end of switch element, switch 05, switch 06, switch 07 just can enter conducting, turn off two states; When conducting, there are again complete conducting (nearly 0 Europe of resistance), linear conducting, HF switch to switch isotype, possess different conductive capabilities.Wherein " complete conducting " is in each embodiment of this specification, main corresponding " simply replacing " execution mode; " linear conducting " is for the power supply change-over device of linear model; And " HF switch switching " is common in the high frequency switch power of prior art, " complete conducting ", " completely turn off ", high frequency is alternately between the two, the voltage of the pulsed (as PWM) of generation time variable-width and/or electric current, for the power supply change-over device of switching mode, there is better performance.Below also will illustrate.
Like the prior art, above-mentioned switch element can adopt various types of power component, include but not limited to: bipolar transistor (BJT, as NPN or PNP), field-effect transistor (MOS-FET or J-FET, N or P type), insulated gate bipolar transistor (IGBT) etc., difference is control mode slightly difference.Obviously, all various electronic devices and components lowering current ducting capacity in the effect of control signal, even if as the switch, solid-state relay etc. of type photoelectric isolating, inherently possess functional characteristic and the effect of electronic switch, be also all applicable to each embodiment of the present utility model.
It should be noted, Rectified alternating current VDC is to the unidirectional charging of energy storage capacitor 04, and it is for subsequent use that object is the ceiling voltage of VDC to be kept at these electric capacity two ends, and when VDC declines, electric current must not flow back to VDC.Therefore, though switch 06 can use above-mentioned all kinds of power devices, but in most cases specifically can be reduced to diode, because diode has natural unilateral conduction, in this adjustment without the need to control signal, switching controls process can be simplified, reduce costs, therefore become preferred in embodiments, as the diode 06A in each accompanying drawing.But under a few special, the application scenario that such as VDC average voltage is relatively low, switch current large and the power output of transducer is larger, use the switching power devices with superior performance still significant, conducting voltage and the power loss of switch 06 can be reduced, the effect reducing forward voltage drop just can be reached as adopted the MOS-FET of low on-resistance, thus raising conversion efficiency, will introduce in the embodiment that Figure 11 is corresponding.
In this specification, be simplified illustration, switch 05 and switch 07 preferably two kinds of forms are used in embodiment: NPN type BJT transistor 05A and 07A, N-type MOS-FET transistor 05B and 07B.The transistor of above two kinds of forms is all applicable preferably preferred kind of the present utility model, is all used to set forth in conjunction with each embodiment and accompanying drawing thereof in the text.
In order to set forth embodiment of the present utility model further, below in conjunction with concrete switch element, the embodiment shown in Fig. 2 being done and gos deep into detailed description.
Please refer to the another embodiment in Fig. 3, in its correspondence Fig. 2, Va is positive pole, and Vb is the situation of negative pole, Va and Vb for this reason in Fig. 2 is labeled as V+ and V-respectively.Here, switch 05 specifically have employed NPN transistor 05A, and switch 06 specifically have employed diode 06A, switch 07 specifically have employed NPN transistor 07A.According to the above-mentioned principle that the utility model discloses, Rectified alternating current VDC voltage is compared (usually in proportion dividing potential drop then compare with reference voltage V ref again) with certain above-mentioned setting voltage value by the voltage comparator in pulsation observation circuit 92, obtain a logic level signal (suspense is CMP); When VDC is higher than setting voltage, CMP is high level, make the commutation circuit in control switching circuit 91 that effective enable signal is connected to switch 05A and make its conducting, and switch 07A turns off because not obtaining effective enable signal.When VDC is lower than setting voltage, CMP is low level, make the commutation circuit in control switching circuit 91 that effective enable signal is connected to switch 07A and make its conducting, and switch 05A turns off because not obtaining effective enable signal.So when VDC higher (higher than setting voltage), the input two ends of power transimission unit 08 obtain voltage through switch 05A from VDC two ends; And VDC lower time, the input two ends of power transimission unit 08 obtain voltage through switch 07A from storage capacitor 04 two ends.It is noted that the control circuit 32A in Fig. 3 is a kind of embodiment of simplification, only for reference during concrete enforcement, the embodiment of more Optimal improvements can be obtained in conjunction with embody rule scene.
Each voltage that embodiment is corresponding therewith or the waveform of electric current, as shown in Figure 4.VDC in figure is the Rectified alternating current voltage waveform obtained by alternating current VAC and through full-wave rectification; According to above-mentioned setting voltage Vset1 and setting voltage Vset2, by pulsation observation circuit 92 Real-Time Monitoring VDC change in voltage situation, size is compared respectively with Vset1 and Vset2, obtaining associated control signal is respectively as shown in X1 and X2 in Fig. 4, as the control signal of switch 05A, switch 07A, through its on off state of control switching circuit 91 drived control, the voltage waveform finally obtained between A, B two ends of power transimission unit 08 as figure in KV aBshown in, the voltage at storage capacitor 04 two ends is as V in figure cAPshown in.As we can see from the figure, when circuit transfers transistor 07A conducting to from transistor 05A conducting (moment T1, this moment VDC=Vset1), the voltage at A, B two ends transfers to obtain from capacitor 04 two ends, after this V cAPand KV aBsynchronously decline in time; Through after a while, the voltage of VDC has risen to certain amplitude (moment T2, this moment VDC=Vset2), and transistor 07A turns off, and transistor 05A conducting, enters next samsara.
It should be noted that, the description of above waveform, correspond to and this embodiment is used in a kind of situation (be simplified illustration, be called " simply replacing " execution mode), that is: smoothing capacitor 02 of the prior art is directly replaced with the circuit as following functions parts composition in Fig. 2 and device: switch 05, switch 06, switch 07, electric capacity 04, pulsation observation circuit 92 and control switching circuit 91.Obviously, " simply replacing " mode easy to understand, being convenient to replace on all types of power supply changeover devices of existing employing smothing filtering electric capacity implement, effect is between A, B two ends of power transimission unit 08, obtain KV in as Fig. 4 aBthe voltage of shown waveform, this voltage source forms the less direct current of a kind of fluctuating range, also can directly export as DC power supply.The advantage of this execution mode is simple, and shortcoming is that number of elements is more, and cost is higher, performance non-optimal.For this reason, in length to be subsequently, be not re-used as emphasis described in detail.
Below in conjunction with several embodiment, feature and the difference of " simply replacing " execution mode and " merge and integrate " execution mode, respectively for linear model power supply change-over device and switched-mode power supply conversion equipment, is described.
If this conversion equipment is linear transformation power supply, please refer to the another embodiment of Fig. 5.This be a kind of based on further refinement embodiment illustrated in fig. 3, the scheme of non-isolated, form linear power converters.In figure, power transimission unit 08D is a kind of common structure for linear DC power supply of connecting, inductor 08D1 (nonessential) wherein and capacitor 08D3 forms LC filter, be used for suppressing interference and the voltage jump of input (A, B end between), transistor 08D4 is adjustment transistor, by controlling the electric current that base current controls to flow through.Like the prior art, when the feedback control circuit 08D5 of power transimission unit 08D the voltage of OUT output is compared as feed back input and with the reference voltage of its inside, form feedback loop time, just become D.C. regulated power supply; When this feedback control circuit 08D5 the load current of output is compared as feed back input and with the reference current source of inside, form negative feedback control time, just become DC constant flowing power.In figure, the anode of Rectified alternating current VDC is V+, and negative terminal is V-; The switch used is respectively NPN transistor 05A and NPN transistor 07A; According to setting voltage Vset1 and setting voltage Vset2, the signal provided by pulsation observation circuit 92 is respectively as shown in X1 and X2 in Fig. 4, through the effect of control switching circuit 91, through driving signal CX1 with CX2 obtained still identical with X1 with X2 in Fig. 4, the respectively on off state of control switch 05, switch 07, the voltage waveform finally obtained between A, B two ends of power transimission unit 08D as figure in KV aBshown in, the voltage at storage capacitor 04 two ends is as V in figure cAPshown in.When circuit transfers transistor 07A conducting to from transistor 05A conducting, the voltage at A, B two ends of power transimission unit 08D obtains from capacitor 04 two ends, the reason now because powering to the load, KV aB, V cAPdecline gradually in time, when dropping to a certain degree, transistor 07A turns off, and transistor 05A conducting, enters next samsara.The embodiment of this process described above being also " simply replacing ".
It is noted that " power transimission unit " is a kind of output unit with certain circuit function in essence.Now its input A, B two ends obtain waveform as Fig. 4 in KV aBshown direct current, under the effect of foregoing circuit, its fluctuation voltage scope significantly reduces, so not only can be used for stable out-put supply, also can be widely used in other many occasions.As an embodiment, this direct current that the fluctuation voltage scope obtained by the effect of foregoing circuit is less, is connected to the output unit 08 that has certain circuit form.Therefore, above-mentioned power transimission unit 08 is only a subset of this output unit 08, and this output unit 08 can also have other various different circuit forms, thus forms more embodiments.
Another important embodiment is (to claim " merge and integrate " execution mode temporarily) in another kind of situation.As already described, the embodiment as Fig. 2 shows, when replacing former smoothing capacitor 02, switch 05, switch 07 also can have the effect of the equivalent parts (the switch 08H4 as Figure 1A) in power transimission unit 08 concurrently; Feedback control circuit 93 bears the effect of the equivalent parts (the feedback control circuit 08H5 as Figure 1A) in power transimission unit 08, thus by merging and integration switches element, simplify the structure of power transimission unit 08, reduce number of components and cost, simplify conversion equipment and improve performance.
Like this, the circuit for such as Fig. 5 also has another embodiment.The adjustment transistor 08D4 (acting on the transistor 16 of same Fig. 1 C) that now in Fig. 5, imaginary circle indicates is cast out, and its function is held concurrently negative by transistor 05A and transistor 07A; And the feedback control circuit 08D5 that empty collimation mark is shown (acting on the feedback control circuit 27 of same Fig. 1 C) is also cast out, its function is integrated in the feedback control circuit 93 in control circuit.According to setting voltage Vset1 and setting voltage Vset2, provide by pulsation observation circuit 92 control signal fluctuating relevant to VDC and (be designated as X1 and X2, as shown in Figure 4), and export to control switching circuit 91; The OUT of this power transimission unit 08D is held voltage (or the electric current exported by feedback control circuit 93, lower same) feed back to its internal circuit, compare with voltage-target, form feedback loop, pass through negative feedback control mechanisms, produce the feedback control signal (being designated as AX) of simulation, and export to control switching circuit 91; It is analog signal CX1, CX2 that control switching circuit 91 carries out signal switching to above-mentioned feedback control signal and dependent timing signal, controls transistor switch 05A and switch 07A alternation, galvanic current pressure is outputted to OUT port.By above dynamic conditioning, make final output voltage stabilization in desired value.In like manner, this embodiment also can form the out-put supply of firm power.
Be understood that, when the output voltage (or output current) of load end changes, transistor 05A and the base stage needed for transistor 07A control electric current also and then change, therefore its control signal CX1, CX2 are no longer square waves, but as shown in Figure 4, be the curve that amplitude fluctuates to some extent with load variations, show that its base current is in the state of Serial regulation, but its switch residing for time location still keep synchronous with signal X1 and X2.With preceding embodiment unlike, transistor 05A and 07A, except the state of closing completely, is not in the pattern of complete conducting during its conducting, but in the pattern of linear conducting, also i.e. linear mode control.Obviously, in this embodiment, transistor 05A and 07A alternation, closely similar with embodiment above, but structure simplifies greatly, is very easily integrated in the circuit of a low cost, or form integrated chip.
By the elaboration to this embodiment, disclose two classes of the present utility model and implement situation, simplified summary is as follows:
The first kind implements situation: retain the switch (as Fig. 5 transistor 08D4) in the power transimission unit 08 in prior art and feedback control circuit (08D5 as Fig. 5) thereof; Now switch 05, switch 07 are under comparatively simple control, only need switch accordingly them along with the cycle of Rectified alternating current, its control signal is consistent with X1, the X2 in Fig. 4, and obtains KV in Fig. 4 at A, B two ends that power transimission unit 08 inputs aBthe voltage of corresponding waveform, provides required power supply by power transimission unit 08.This i.e. " simply replacing " mode recited above, is applicable in various types of transducer, directly substitutes original smoothing capacitor 02 with circuit of the present utility model and device.
Equations of The Second Kind implements situation: cast out the switch (the transistor 08D4 as Fig. 5) being positioned at power transimission unit 08 in original linear model converter scheme, its function is merged into switch 05 and the switch 07 of embodiment; Cast out original feedback control circuit (08D5 as Fig. 5), by its Function Integration Mechanism in feedback control circuit 93, thus simplify circuit, reduce costs, be convenient to the integrated of technique and circuit, improve performance, embody obvious superiority.This implements in situation, and control signal CX1, CX2 have the effect of switching and Linear Driving concurrently, has known in the diagram and has embodied intuitively, will contribute to the understanding to the circuit of the utility model announcement and the core element of device thereof.
For the conversion equipment adopting switching mode, can with reference to the another embodiment of figure 6.This is also a kind of scheme of the further refinement based on Fig. 3 embodiment, power supply changeover device that form high frequency switch-mode, that isolate.In Fig. 6, power transimission unit 08A is the common structure for switched-mode power supply, what adopt is the topological structure of inverse-excitation type, isolating transformer 08A1 is wherein in switching transistor conduction period storage power, at switching transistor blocking interval, this energy outputs to load end by diode 08A2 and capacitor 08A3.As shown in the figure, in power transimission unit 08A and Figure 1A, power transimission unit 08H is very similar, and difference is, has cast out original switch 08H4 here, its function has been fused in transistor 05A and transistor 07A; Feedback control circuit 08H5 is also cast out, and its function has been fused in feedback control circuit 93.Equally, according to existing known technology, when feedback control circuit 93 using the voltage of OUT output as feed back input and compare with its internal reference voltage, form feedback loop time, just become D.C. regulated power supply; When this feedback control circuit 93 using the load current of OUT output as feed back input and with internal reference current ratio comparatively, form feedback loop time, just become DC constant flowing power.In figure, the anode of Rectified alternating current VDC is V+, and negative terminal is V-; The NPN transistor used is 05A and 07A, controls its base current respectively by control signal SX1 and SX2; According to setting voltage Vset1 and Vset2, the coherent signal provided by pulsation observation circuit 92 is respectively as shown in X1, the X2 in Fig. 4; Change through control switching circuit 91 and drive into signal SX1, SX2 as shown in Figure 4, control the on off state of transistor 05A, transistor 07A respectively, the voltage waveform finally obtained between A, B two ends of power transimission unit 08A is as the SV in Fig. 4 aBshown in, be a kind of pulse voltage.After circuit switches to transistor 07A conducting from transistor 05A conducting, the voltage at A, B two ends of power transimission unit 08A obtains from capacitor 04 two ends, and SV aBconstantly decline in time, when dropping to a certain degree, transistor 07A turns off, and transistor 05A conducting, enters next samsara.By above controlling mechanism, the present embodiment is made to form the stable out-put supply of switching mode.
Prior art discloses, the topological structure of the switch-mode DC power supply of this inverse-excitation type and the structure of positive activation type are closely, only slightly need do to change to the connection of transformer terminal in figure, and adopt normal shock feedback control mechanism, the embodiment of Fig. 6 can be become positive activation type Switching Power Supply, thus become another embodiment of the present utility model, no longer launch at this.
Above embodiment discloses the 3rd class of the present utility model and implements situation, and simplified summary is as follows:
3rd class implements situation: cast out the switch (the transistor 08H4 as Figure 1A) in the power transimission unit 08 in original switch-mode converter scheme, be merged in the switch 05 of the utility model embodiment, switch 07; Cast out original feedback control circuit (08H5 as Figure 1A), be integrated in feedback control circuit 93, thus simplify circuit, reduce costs.This implements situation and shows, has also known in the diagram and has embodied intuitively: control signal SX1, SX2 are merged by feedback control signal PX and associated control signal X1, X2 to obtain.Obviously, disclose such correlation and will contribute to the understanding to the circuit of the utility model announcement and the core element of device thereof.
Embodiment can find thus, in most of the time in the pulsation period of Rectified alternating current, electric energy needed for change-over circuit is directly provided by Rectified alternating current, and energy storage capacitor 04 only needs to provide energy in the short period of time, therefore the minimum capacity required for it reduces widely compared with original smoothing capacitor 02, also namely no longer needs very large capacitance to meet system requirements.Thus, above-mentioned various technical problem of the prior art is greatly improved.
Obviously, the capacitance of above energy storage capacitor 04 has a minimum value, is not difficult quantitatively to calculate, does not launch at this according to the crest voltage of Rectified alternating current and the peak power output of cycle and power-switching circuit.
The physical significance of this minimum capacity is: under given parameters, and in worst case, as long as the capacitance of this capacitor is not less than this minimum value, just according to the requirement of setting, can provide and continuously stablize out-put supply at power transimission unit 08.
In conjunction with the knowledge that prior art discloses, only power transimission unit 08 need be equipped with different circuit forms, utilize the device in circuit structure provided by the utility model and embodiment, by different combinations, just can form the embodiment of various types of power-switching circuit, comprise the transducer of linear or switching mode, voltage stabilizing output or constant current output transducer, exchange export or transducer that direct current exports, the transducer of boosting or step-down, isolation or the transducer of non-isolated, etc.
In order to illustrate further, refer again to the another embodiment that Fig. 7 discloses.This is also a kind of based on Fig. 3 embodiment, but compares the isolated scheme of Fig. 6 embodiment more refinement, by the implementation of " merge and integrate ", constitutes a kind of switching mode AC-DC conversion equipment of inverse-excitation type, embodies core element of the present utility model.
In the figure 7, alternating current obtains Rectified alternating current VDC through rectification circuit 01 rectification; Transistor switch 05B and switch 07B is the MOS-FET transistor of N-type, and their conducting controls by pulse control signal SX1 and SX2 respectively with shutoff; Containing the EMI filtering capacitor 031 of a small capacity in figure; Pulsation observation circuit 92, for monitoring the voltage fluctuation at VDC two ends, by comparing with setting voltage Vset1 and Vset2, generating coherent signal (being designated as X1, X2), it being exported to control switching circuit 91; This power transimission unit 08A output OUT is held the voltage (or electric current or the power that export by feedback control circuit 93, lower same) feed back to internal circuit, compare with its desired value, form feedback loop, use negative feedback control mechanisms, produce the feedback control signal (being designated as PX) of impulse form, export to control switching circuit 91; Control switching circuit 91 pairs of feedback control signals and dependent timing signal merge, and drive as SX1, SX2 signal, control transistor switch 05B and switch 07B and make it with pulsation period alternation, form SV in as Fig. 4 at power transimission unit 08A input aBthe voltage of waveform, finally outputs to OUT port by voltage, by above dynamic conditioning, makes final output voltage stabilization in desired value.This is all the 3rd above-mentioned class and implements situation.
Described in preceding embodiment, this embodiment can become various stable out-put supply equally.With reference to above execution mode, in conjunction with existing various power converter topology, just can by circuit of the present utility model and device Combination application among the transformation of existing various power supply changeover device, and become again embodiments different one by one by mutual combination, convert Rectified alternating current to stable out-put supply, reach the purpose of this utility model.Below again by other embodiments, be described further.
Please refer to the another embodiment that Fig. 8 discloses.This is also a kind of based on Fig. 3 embodiment, scheme compared with the non-isolated of refinement, is also the conversion equipment consisting of a kind of switching mode " merge and integrate " mode, embodies design feature of the present utility model equally.In figure, power transimission unit 08B is a kind of circuit structure being widely used in switch power converter, for the BUCK topological structure of voltage-dropping type.Inductor 08B2 is wherein as energy storage device, in switching transistor conduction period storage power, at switching transistor blocking interval, by the afterflow effect of diode 08B1, the energy of storage is outputted to load end constantly, and capacitor 08B3 plays High frequency filter effect.In some cases, diode 08B1 also can replace with a switch (as N-type MOS-FET), forms the circuit of synchronous rectification known, does not launch at this.
In fig. 8, similar with a upper embodiment, according to setting voltage value Vset1 and Vset2, by pulsation observation circuit 92 for monitoring the voltage fluctuation of Rectified alternating current VDC, coherent signal is exported to control switching circuit 91; Feedback control circuit 93 uses negative feedback control mechanisms, feedback control signal is exported to control switching circuit 91; Dependent timing signal and feedback control signal are merged into control signal SX1, SX2 by control switching circuit 91, control the on off state of two switches respectively, making them separately with entering shutoff or HF switch switch mode the period of waves of this Rectified alternating current, finally making this power transimission unit 08B provide stable out-put supply.Here, the base control signal of switch 05A and switch 07A is also as shown in SX1, the SX2 in Fig. 4, and the waveform of A, B both end voltage of power transimission unit 08B is also as the SV in Fig. 4 aBshown in.Similarly, the conversion equipment of this embodiment can form various stable out-put supply.
Find out thus, specific to implementation detail, various conversion equipment is closely similar in control mode.Wherein, using output voltage as its FEEDBACK CONTROL object, form the embodiment of stabilized voltage power supply; During using output current as the object of FEEDBACK CONTROL, form the embodiment of constant-current supply.Also be like this in the examples below, therefore no longer describe in detail.
In an embodiment of Fig. 9, except being specifically provided with the detection part 08C4 of an inductive current, the parts of the remainder of power transimission unit 08C and the power transimission unit 08B shown in Fig. 8 are suitable.It is well known that, the detection mode of electric current has various concrete form, wherein relatively conventional, be also mode with low cost be utilize fixed resistance to sample, according to the principle of Ohm's law, change current detecting into voltage detecting, according to the principle described above and circuit structure, this device can form DC constant flowing power.
With the switching mode of more details, the DC constant flowing power device of non-isolated, be in the embodiment of shown in Figure 10.This device can be used as the constant-current supply of semiconductor lighting equipment; the electrolytic capacitor using high-temperature behavior not good can be avoided; thus improve the useful life of constant-current supply and even lighting apparatus; improve the electric property such as power factor (PF), energy conversion efficiency; and reduce volume and weight, be conducive to protection that is energy-conservation, resources and environment.In Fig. 10, power transimission unit 08G is consistent with the 08C in the embodiment above shown in Fig. 9, and just current sensing means used is embodied as resistance 08G4; Miscellaneous part has and more concrete realizes details: pulsation observation circuit 92, control switching circuit 91 and feedback control circuit 93 are combined, formation control device 32B, it is as the core component of whole conversion device signal process and control, one independently circuit assembling structure form can be made into, become a functional circuit module or integrated circuit.
The function description that this controller 32B performs is as follows: by VL input, and pulsation observation circuit 92 monitors the voltage fluctuation situation of Rectified alternating current VDC and output ripple coherent signal, with reference to the detailed description of X1 and the X2 signal waveform in figure 4 and preceding embodiment; Transistor 05B and transistor 07B with the mutual alternation of this pulsation coherent signal, and under control switching circuit 91 acts on, makes HF switch and switches during conducting; Wherein, the inductive current (transfer to and detect voltage) obtained by current sense resistor 08G4 delivers to the iDET pin of controller 32B, and compare with the reference current (transferring the desired value detecting voltage to) in feedback control circuit 93: when inductive current is less than reference current, transistor (05B or 07B) conducting, the electric current now in inductor 08G2 rises fast; When this inductive current is greater than reference current, transistor (05B or 07B) turns off, and the electric current now in inductor 08G2 is by diode 08G1 afterflow but decline gradually ... between the conduction mode making transistor (05B or 07B) be operated in HF switch switching thus and off state.Inductive current wherein, is the feedback current described in preceding embodiment; The frequency of switch changes along with the voltage fluctuation at Rectified alternating current VDC and electric capacity 04 two ends, and the voltage formed at power transimission unit 08G two ends is as the SV in Fig. 4 aBshown in; The operation principle of dc-dc converter is substantially identical with prior art.Finally, by above control procedure, the electric current in inductor 08G2 and light-emitting diode (LED component) 20A1 is stabilized near target current value, meets the feature of direct current constant current output.Should recognize, above control procedure also relates to ins and outs and implementation more specifically, can have flexile form, as voltage mode control, current control mode, sluggish control model etc., all belongs to known technology, is all applicable in the present embodiment.
Please continue to refer to the device of Figure 10.Figure middle controller 32B holds as with reference to current potential (virtual earth VG or title " floating ground ") using the A of power transimission unit 08G, and when switching transistor 05B (or 07B) conducting, the A end of power transimission unit 08G is in higher current potential; When switching transistor 05B (or 07B) turns off, the current potential approximately equal that the current potential of the A end of power transimission unit 08G and B hold, therefore it is now the better time being easy to monitor Rectified alternating current VDC voltage, the instantaneous voltage of now VDC directly can be monitored by divider resistance, it is compared with certain setting voltage Vset1 and Vset2, the signal relevant to pulsating voltage can be provided; Simultaneously owing to capacitor 08G3 two ends existing about a few to tens of voltages lied prostrate, electric current through resistance 20A5 and diode 20A4 will charge to capacitor 20A3, between the vdd terminal and virtual earth VG of controller 32B, form supply voltage, just in time become controller 32B and normally to work required power supply; Before constant-current supply is started working, the supply voltage needed for controller 32B is obtained capacitor 20A3 charging through current limiting element 20A2 by VDC; Current limiting element 20A2 is the conventional resistor that resistance is enough large, or semiconductor element etc. has the device of current-limiting function.Finally, the electric current flowing through inductor 08G2 has all flowed in the light emitting diode module 20A1 of load end substantially, and according to above-mentioned current constant control process, outputting current steadily near target current one very in minizone.
As another embodiment, above-mentioned controller 32B, together with transistor 05B and transistor 07B, is made into a kind of circuit assembling structure form, as functional circuit module or integrated circuit, to obtain higher integrated level; As another embodiment, more also include other circumferential component in Figure 10 in this circuit assembling structure form further, obtain better effect.
Moreover, should recognize that the circuit that the utility model discloses and device also have other more embodiments.With reference to the another embodiment shown in Figure 11.In the drawings, circuit of the present utility model and device are used to the switching power circuit of a semi-bridge type, make it also to cast out jumbo smothing filtering electric capacity, realize the purpose of this utility model.Because this is also a kind of known mature technology, only do simple elaboration at this: the A end of power transimission unit 08E is connected with high side transistor 05B, transistor 07B and low side transistor 08E1 respectively; High side transistor (05B, 07B alternately) and low side transistor high frequency alternate conduction and cut-off, SV in the formation of A end is as Fig. 2 aBthe pulse voltage of waveform, is input to electric current in the series loop of pulse transformer 08E2 and capacitor 08E3 composition, finally obtains required voltage or electric current through unsteady flow parts 08E4 at OUT output; Wherein, under pulsation observation circuit 92 acts on, high side transistor 05B and transistor 07B is with pulsation period alternation; Control procedure is identical with embodiment noted earlier with operation principle; Low side transistor 08E1 is driven by feedback control circuit 93, and its control principle and mode and prior art are consistent, and easily draw details, therefore no longer carefully state.In addition, as another embodiment, in this figure, carry out via switch 06C to storage capacitor 04 charge path, can see, this switch 06C is a kind of P type MOS-FET transistor, when big current or low pressure applications, conduction voltage drop can be controlled at below 0.7V, thus improve conversion efficiency.The course of work is as follows: a voltage comparator in pulsation observation circuit 92 is used for comparing the current potential (V+ point and Vc point) at switch 06C two ends; Current potential as V+ point is higher, then comparator exports high level and controls transistor 28 conduction mode (nearly 0 Europe of resistance) completely, Vg point current potential is dragged down, switch 06C conducting, the voltage of VDC is introduced storage capacitor 04 and charges; Current potential as V+ point is lower, then comparator output low level, and transistor 28 turns off, and Vg and Vc current potential is identical, and switch 06C is turned off, and charging process is now supspended.It should be noted that, switch 06C is only operated in complete conducting or off state.
Further, in Figure 12, also reveal that an embodiment of the present utility model, coordinate prior art, in the improvement for the Switching Power Supply topology of bridge-type.Compare semi-bridge type structure, the quantity of its switch element doubles.In the drawings, feedback control circuit 93 produces two control signals and drives low side transistor 08F1 and 08F3, and this is identical with prior art; Four signal controlling (be tool intuitive, do not connect in figure) that all the other four transistors export by control switching circuit 91; In figure, power transimission unit 08F has three input terminals, and A end is originally disassembled into A1 and A2 two terminals, and B end originally remains unchanged; Output and semi-bridge type structure similar, is made up of pulse transformer 08F2 and unsteady flow parts 08F4, performs identical function; When the voltage of terminal A1 is driven to high potential, the voltage of terminal A2 is driven to electronegative potential, and vice versa.The mode of operation of A group switching transistor (module 57A, transistor 08F1) and control mode, with similar during half-bridge; The mode of operation of B group switching transistor (module 57B, transistor 08F3) and control mode are identical with A group, only contrary in phase place; Module 57A is made up of two transistors, respectively switch 05, the switch 07 of equivalent preceding embodiment, and its mode of operation, control mode, role are consistent with preceding embodiment; Module 57B is like this equally.With reference to the mode that prior art and previous examples are introduced, easily draw the more details of embodiment.
Further disclose another embodiment in fig. 13, the utility model is applied in the switching power circuit of push-pull type.Such topological structure also belongs to known mature technology, also adopts identical switched-mode power supply technology in essence.Wherein, the KV in A, B both end voltage waveform of the input of power transimission unit 08 and Fig. 4 aBunanimously, the drive singal of switch 08K1 and switch 08K2 and prior art are consistent.With reference to the mode that existing mature technology and previous examples are introduced, easily obtain the more details of embodiment.
As previously mentioned, in the embodiment shown in Figure 2, except Va be positive pole, Vb is except the situation of negative pole, also have another kind of embodiment, namely when Vb positive pole, Va are the situation of negative pole, as shown in the embodiments of figure 14, V+ is the positive pole of Rectified alternating current, and V-is then negative pole.It will be appreciated that according to this type of situation, according to above-mentioned similar principle, also can be embodied as a series of embodiments that form is different, above as each embodiment introduced.Therefore, this is also the importance that will disclose.Difference is, position has been intercoursed at the positive and negative two ends of A, B of the input of the power transimission unit 08 in figure.In addition, with the connection of previous examples and control principle similar, and because of identical with the topological structure of embodiment as shown in Figure 2, both have natural similitude.Below with regard to this simple declaration.
In fig. 14, switch 05, switch 06, switch 07 with adopt identical element in Fig. 3, be respectively NPN transistor 05A, diode 06A, NPN transistor 07A, but their sense of current all changes: that one end all flowing to V mono-from the B end of power transimission unit 08.However, the waveform of the control principle of employing, the waveform of control signal and coating-forming voltage is all say that with above-described embodiment situation about describing is identical or identical.
Further, more concrete circuit arrangement, the embodiment by Figure 15 is described.Power transimission unit 08A, together with above-mentioned switch element etc., forms an inverse-excitation type switch power-supply.Its operation principle is equal to the embodiment of Fig. 6, no longer repeats at this.And in the embodiment of Figure 14 and Figure 15, because adopting NPN transistor 05A, 07A, the emitter of these two transistors is not on same potential point, cause its drived control convenient like that not as previous examples, because they do not have easily, can be used as the electronegative potential point of the emitter of two transistor common reference.Equally, if N-type MOS-FET used instead by these two switches, also same case can be faced.With reference to the drived control mode of prior art, as adopted pulse isolation transformer or photoelectric isolated driver etc., above driving problems can be solved, but implementation cost and complexity are slightly high.
But if switch 05A, switch 07A use PNP transistor or P type MOS-FET transistor instead, situation is just better, with reference to shown in Figure 16.Now because the B end of power transimission unit 08 (in Figure 16 08H) can be used as the shared potential reference point of control circuit with the emitter of two PNP transistor switch 05C, switch 07C, to be more convenient for the driving of control circuit to two PNP transistor, by general negative supply technology and negative current drive mode, can simplified design, embody the design feature be equal to preceding embodiment, contribute to improving integrated level, reduce implementation cost and conversion equipment complexity.
In the embodiment of figure 16, also as previously described, if the switch element 08H4 retained in power transimission unit 08H and feedback control circuit 08H5 thereof, the embodiment of " simply replacing " implementation can also be become; If cast out switch element 08H4 and feedback control circuit 08H5 thereof, its function is merged and is incorporated in switch 05C, switch 07C, control circuit, just become the embodiment that employing " merges and integrate " mode.With reference to explanation above, corresponding details can be drawn, no longer repeat at this.
Can see, compare the embodiment shown in Figure 14 ~ 16, the circuit structure that foregoing each embodiment uses because of the Rectified alternating current VDC in such as Fig. 2 circuit Va for just, Vb for negative and be convenient to employing electric conductivity preferably N-type transistor switch (as NPN or N-type MOS-FET etc.) and have topological structure comparatively simply, be easier to the advantages such as realization, electrical property be better, can be used as cost benefit preferred embodiment of the present utility model.
By the concrete elaboration of each embodiment above, illustrate, the circuit that the utility model discloses and device can be applied in a lot of occasion, as long as these occasions need powered by Rectified alternating current and carry out Power convert output, are particularly converted to stable out-put supply.By circuit that the utility model is disclosed and application of installation in these occasions, the execution mode of " simply replacing " or " merge and integrate " is adopted to replace to jumbo smothing filtering electric capacity wherein, the utility model is implemented according to the detailed description in above embodiment, just can reduce surge current, reduced volume, increase reliability, improve power conversion efficiency, increase the service life, expand temperature applicable range etc., reach the purpose of this utility model.When Rectified alternating current derives from alternating current, because in each cycle, the time of current conduction adds, so power factor (PF) also improves.Above-mentioned application scenario includes but not limited to: 1) the stable out-put supply of various topological structure, as D.C. regulated power supply, DC constant flowing power, alternating current steady voltage plug, interchange constant-current supply, firm power power supply etc.; 2) Rectified alternating current that obtains through full-wave rectification or halfwave rectifier of sinusoidal ac; Other are various has the Rectified alternating current of periodic waveform (as triangular wave, trapezoidal wave, square wave, irregular waveform) feature as input power; 3) through the Rectified alternating current of EMI filtering; 4) various dissimilar, multi-form power transimission unit, as the transducer of the transducer of linear model or switching mode, boosting or step-down, isolation or the transducer etc. of non-isolated; 5) switch-mode converter etc. of bridge-type, semi-bridge type, push-pull type, single-end ortho-exciting, single-ended reverse exciting; 6) there is in above device the element of switching characteristic, comprise NPN transistor, N-type MOS-FET, PNP transistor, P type MOS-FET, and the electronic switch power component of all kinds of equivalent effect, etc.; 7) drive unit of the electronic switching element in above device, comprises Direct driver, transformer isolation drives, Phototube Coupling drives, etc., mutually can combine, become the embodiment that the utility model is different.
By the concrete elaboration of each embodiment above, the main points describing the device that the utility model discloses are exactly: use several parts, namely the switch 05 shown in Fig. 2, switch 06, switch 07, electric capacity 04, control circuit 32, replace the Large Copacity smothing filtering electric capacity 02 that original technology adopts, be applied in original various power supply change-over device.Wherein: 1) by adopting " simply replacing " implementation, simple replacement being done to this Large Copacity smothing filtering electric capacity, just can realize the function equal with original technical scheme simply and easily; 2) by adopting " merge and integrate " implementation, casting out the original switch element in power transimission unit 08 and its function is merged in switch 05 and switch 07, more original feedback control function is incorporated in control circuit 32, obtaining better effect.No matter above innovation, be implemented on linear power supply or Switching Power Supply, all can realize the purpose of this utility model.
For obtaining better concrete implementation result, as an embodiment, pulsation observation circuit 92, control switching circuit 91 and part satellite parts thereof, be incorporated in a control circuit 32 (as Fig. 2), as the core component of signal transacting and control switch 05, switch 06, switch 07 on off state, with certain independently circuit assembling structure form, as functional circuit plate, circuit module, thick film circuit or semiconductor integrated circuit etc., match with the miscellaneous part in conversion equipment, convert this Rectified alternating current to described stable out-put supply.Such as, utilize semiconductor technology and technology that this control circuit 32 is made into integrated circuit, greatly will simplify circuit, reduced volume, and reduce costs, improve performance, thus obtain good implementation result and economic benefit.
As another embodiment, feedback control circuit 93 is also incorporated in above-mentioned control circuit 32, and forms one independently circuit assembling structure form, to improve the integrated level of this circuit assembling structure form.
As another embodiment, in above circuit assembling structure form, also comprise the part or wherein most of in switch 05, switch 06, switch 07, electric capacity 04 and other circumferential component (as drive circuit etc.), thus improve the integrated level of this package assembly further.For Fig. 3, if switch 05, switch 07 are combined with control circuit 32A, form a kind of integrated circuit (IC) chip, will good implementation result be had.Certainly, also have other combinations abundant flexibly that other are of this sort, also form embodiment of the present utility model.As another embodiment, in this circuit assembling structure form, further comprises all parts such as switch 05, switch 06, switch 07, energy storage capacitor 04 and other circumferential component, thus become the device that has more high integration.
As another embodiment, in the device that can disclose at the utility model, add some components and parts, be used for optimizing the design of specific product.Such as, in the circuit shown in Fig. 2, one diode is closely connected on switch 05 (and/or switch 07, lower same) before, in some cases (during as high-voltage applications, or for raising the efficiency) can to strengthen when switch 05 turns off reverse voltage or current blocked ability, improve the safe working condition of switch element, specific in Fig. 9 being exactly the diode sealing in a conducting to the right at P point.In addition, as another embodiment, an inductance is connected between switch 06 and Rectified alternating current, the effect suppressing EMI and/or increase electric capacity 04 store electrical energy can be played, an inductance can be sealed at Q point specific in Fig. 9.All this kind is all based on concrete practical range of the present utility model.
It will be appreciated that the Rectified alternating current that the fluctuating range that the device utilizing the utility model to disclose obtains significantly reduces also can be applicable to other various occasions in addition, but not be only stable out-put supply.Such as, the power transimission unit 08 in Fig. 2 can being replaced to certain load circuit, forming a kind of device for realizing certain function.This load circuit can be the circuit that structure is comparatively complicated, and also can be very simple device, can be even a resistance.Now, due to the expansion of intended scope, above-mentioned " power transimission unit 08 " refers to more appropriate with " output unit 08 ", and this output unit 08 can be a Connection Element, an output port, power device, a functional circuit ... namely " power transimission unit 08 " is one of the many kinds of concrete forms of " output unit 08 ".As another embodiment, when output unit 08 is only an output port, the device that the utility model provides can under the condition not using smothing filtering bulky capacitor, the direct current that output ripple amplitude is less.
It is to be noted, stable out-put supply in this specification should be understood to: have the device that several export, its voltage exported or electric current or power are in the allowed band of system nominal under certain condition, and certain hour (or time period) in the metastable characteristic of embodiment.Set forth with reference to above, the various types of stable out-put supply meeting above implication can become embodiment of the present utility model, forms different embodiment, cannot state to the greatest extent as space is limited.
Therefore, be only very little a part of embodiment of the present utility model described in literary composition, only with the understanding of helping technical staff and to carry out core element of the present utility model complete display, be not used for limiting practical range of the present utility model.Those skilled in the art also can understand, in concrete implementation process, the form of expression of various Functional Unit device, module, unit and parts, combining form, clssification and designation mode even describing mode vary with each individual often, and just because of these diversified changes, make to state the exhaustive of doing of all specific embodiments in the text.
Technical scheme form relevant in this area is abundant, with countless changes, there is the those of ordinary skill of usual knowledge on the basis understanding the core element that the utility model discloses, more embodiment can be supplemented completely, or above embodiment is carried out distortion in various degree, amendment, processing, combination, supplemented and expansion.In addition also it will be appreciated that the concrete example such as term such as " NPN transistor ", " current detection circuit ", only provide for illustrative purposes, be not intended to limit its function, effect, the form of expression.All equalizations done according to circuit form, topological structure, feature and the spirit described in right of the present utility model change and modify, and all should be included in right of the present utility model.

Claims (10)

1. powered by Rectified alternating current and carry out the device of Power convert output, comprising: Rectified alternating current, as input power, there is first end, the second end; First switch element (05), have first end, the second end and control end, its first end is connected with the first end of this Rectified alternating current; Second switch element (06), have first end, the second end and control end, its first end is connected with the first end of this Rectified alternating current; Energy storage capacitor (04), has first end, the second end, and its first end is connected with the second end of this second switch element (06), and its second end is connected with the second end of this Rectified alternating current; 3rd switch element (07), have first end, the second end and control end, its first end is connected with the first end of this energy storage capacitor (04), and its second end is connected with the second end of this first switch element (05); Control circuit (32), there is several control signal outputs, be connected with the control end of the 3rd switch element (07), for controlling its turn-on and turn-off respectively with this first switch element (05), this second switch element (06) respectively; Output unit (08), export for providing the power supply through conversion to load or late-class circuit, at least there is first end and the second end as two inputs, its first end is connected with the second end of the 3rd switch element (07), and its second end is connected with the second end of this Rectified alternating current.
2. device as claimed in claim 1, it is characterized in that: this control circuit (32) comprises voltage comparator circuit (92) and signal switching circuit (91), the voltage at Rectified alternating current and this energy storage capacitor (04) two ends is compared with setting voltage respectively, obtain the signal controlling above-mentioned each switching elements conductive and shutoff, the voltage making this output unit (08) input two ends to obtain through conversion.
3. as the device of claim 1 or 2, it is characterized in that: when the voltage of this Rectified alternating current is higher than this energy storage capacitor (04) both end voltage, this Rectified alternating current via this second switch element (06) to this energy storage capacitor (04) charging energy-storing; When the voltage of this Rectified alternating current is lower than this energy storage capacitor (04) both end voltage, above-mentioned charge rest.
4. as the device of claim 1 or 2, it is characterized in that: when this pulsating direct current piezoelectric voltage is higher, this output unit (08) obtains voltage via this first switch element (05) from these Rectified alternating current two ends; When this pulsating direct current piezoelectric voltage is lower, this output unit (08) obtains voltage via the 3rd switch element (07) from this energy storage capacitor (04) two ends.
5. as the device of claim 1 or 2, it is characterized in that: this second switch element (06) is diode; This control circuit (08), as long as minimum have two control signal outputs, is connected with the control end of this first switch element (05) with the 3rd switch element (07) respectively.
6. as the device of claim 1 or 2, it is characterized in that: this output unit (08) is a port for being electrically connected, is exported by direct current power source voltage less for fluctuating range scope by this connectivity port.
7. as the device of claim 1 or 2, it is characterized in that: this output unit (08) is a power conversion unit, and also there is output port, obtain electric energy by the voltage at this power conversion unit (08) input two ends and by its internal circuit, input electric energy be converted to stable out-put supply; This control circuit (32) also comprises feedback control circuit (93).
8. device as claimed in claim 7, it is characterized in that: this control circuit (32) is according to the instantaneous voltage of this Rectified alternating current, and utilize negative feedback control principle, this coupled first switch element (05) and the 3rd switch element (07) are carried out to the control of on off state and conduction mode, finally form stable out-put supply at the output of this power conversion unit (08).
9. device as claimed in claim 8, it is characterized in that: this first switch element (05) and the 3rd switch element (07) alternation, at linear conduction mode or off state, form stable out-put supply at the input of output unit (08) or the output of power conversion unit (08).
10. device as claimed in claim 8, it is characterized in that: this first switch element (05) and the 3rd switch element (07) alternation are at high frequency switch-mode or off state, form high-frequency pulse voltage at the input two ends of output unit (08), and form stable out-put supply at the output of power conversion unit (08).
CN201420724425.2U 2013-11-28 2014-11-27 The power supply change-over device of being powered by Rectified alternating current Withdrawn - After Issue CN204481706U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420724425.2U CN204481706U (en) 2013-11-28 2014-11-27 The power supply change-over device of being powered by Rectified alternating current

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201320764096 2013-11-28
CN201320764096X 2013-11-28
CN201420724425.2U CN204481706U (en) 2013-11-28 2014-11-27 The power supply change-over device of being powered by Rectified alternating current

Publications (1)

Publication Number Publication Date
CN204481706U true CN204481706U (en) 2015-07-15

Family

ID=53317427

Family Applications (2)

Application Number Title Priority Date Filing Date
CN201420724425.2U Withdrawn - After Issue CN204481706U (en) 2013-11-28 2014-11-27 The power supply change-over device of being powered by Rectified alternating current
CN201410696569.6A Active CN104682741B (en) 2013-11-28 2014-11-27 The power supply change-over device powered by Rectified alternating current

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN201410696569.6A Active CN104682741B (en) 2013-11-28 2014-11-27 The power supply change-over device powered by Rectified alternating current

Country Status (1)

Country Link
CN (2) CN204481706U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104682741A (en) * 2013-11-28 2015-06-03 徐运哲 Power supply switching device supplied by pulsating direct current
CN113922434A (en) * 2020-07-10 2022-01-11 Oppo广东移动通信有限公司 Power supply device and charging control method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105517263B (en) 2016-02-03 2018-08-07 广州腾龙电子塑胶科技有限公司 Voltage changer
CN110932572B (en) * 2019-11-08 2023-04-07 国网冀北电力有限公司张家口供电公司 Direct current power supply circuit and system
CN113179042A (en) * 2021-05-25 2021-07-27 中国工程物理研究院机械制造工艺研究所 Low-power high-precision pulse electroplating power supply
CN115150235A (en) * 2022-02-22 2022-10-04 固赢科技(深圳)有限公司 DC component interference suppression circuit and control method thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH609932A5 (en) * 1976-09-22 1979-03-30 Hatec Ag Method for supplying at least one bicycle light source with power and device for carrying out the method
DE69524465T2 (en) * 1994-04-08 2002-05-23 Vlt Corp Efficient power conversion
JPH0898509A (en) * 1994-09-27 1996-04-12 Matsushita Electric Works Ltd Power supply device
JP3814800B2 (en) * 2002-08-20 2006-08-30 有限会社サンブリッジ Output stabilization system
US6856119B2 (en) * 2003-01-21 2005-02-15 Analog Modules, Inc. Single-stage power factor corrected capacitor charger
KR100724313B1 (en) * 2006-02-28 2007-06-04 조영창 Method for converting voltage and converter for performing the same
TWI325675B (en) * 2006-08-07 2010-06-01 Addtek Corp Dc/dc converter having auto auxiliary voltage supply and output fail protection
CN204481706U (en) * 2013-11-28 2015-07-15 徐运哲 The power supply change-over device of being powered by Rectified alternating current

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104682741A (en) * 2013-11-28 2015-06-03 徐运哲 Power supply switching device supplied by pulsating direct current
CN104682741B (en) * 2013-11-28 2019-06-07 徐运哲 The power supply change-over device powered by Rectified alternating current
CN113922434A (en) * 2020-07-10 2022-01-11 Oppo广东移动通信有限公司 Power supply device and charging control method

Also Published As

Publication number Publication date
CN104682741A (en) 2015-06-03
CN104682741B (en) 2019-06-07

Similar Documents

Publication Publication Date Title
CN204481706U (en) The power supply change-over device of being powered by Rectified alternating current
US9907130B2 (en) High-efficiency LED driver and driving method
CN101795068B (en) Switch type regulator and control method thereof
CN102832836B (en) Cascade boost and inverting buck converter with independent control
CN102801341B (en) There is the AC/DC transducer of PFC and DC/DC transducer
CN102916593B (en) Power converter circuit
CN103702486A (en) LED driving circuit system, control circuit and control method
CN105048795A (en) Enhanced power factor correction
CN102612224B (en) A kind of MR16LED lamp drive circuit, driving method and apply its MR16LED lamp illuminating system
CN101557166A (en) Power supply apparatus and semiconductor integrated circuit device
CN105515418A (en) PFC shutdown circuit for light load
CN103108470A (en) Dynamic linear control light emitting diode (LED) driver circuit
CN103597721B (en) Nonisulated step-down switching regulator and control circuit, electronic equipment, AC adapter
US20180041073A1 (en) Power Converter with Output Voltage Control
CN102820799A (en) Switching power supply circuit, semiconductor device, and LED lighting device
CN103683919A (en) High-power-factor low-harmonic-distortion constant current circuit and device
CN111064369A (en) Switching power supply circuit
CN104770064A (en) Power conversion with controlled capacitance charging including attach state control
CN103647448B (en) Integrated step-down-flyback type high power factor constant current circuit and device
CN109643957A (en) Switching power unit and semiconductor device
CN103269162B (en) A kind of Quasi-single-stage high power factor constant current circuit and device
CN101834527B (en) Two-stage switching power supply conversion circuit
CN102647083B (en) Boost two-way voltage balance converter
CN203617902U (en) Integrated buck-flyback type high power factor constant current circuit and device
CN204258608U (en) Ripple suppression circuit and circuit system comprising same

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20150715

Effective date of abandoning: 20190607

AV01 Patent right actively abandoned