CN202931200U - Small-volume high-power-density module power supply - Google Patents
Small-volume high-power-density module power supply Download PDFInfo
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- CN202931200U CN202931200U CN 201220613675 CN201220613675U CN202931200U CN 202931200 U CN202931200 U CN 202931200U CN 201220613675 CN201220613675 CN 201220613675 CN 201220613675 U CN201220613675 U CN 201220613675U CN 202931200 U CN202931200 U CN 202931200U
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Abstract
The utility model discloses a small-volume high-power-density module power supply which includes a transformer, an RCD absorption circuit, an input filter circuit, a first output filter circuit, a second output filter circuit, a feedback circuit, a control circuit, and a starting and auxiliary power supply circuit. The transformer is coupled with the first output filter circuit and the second output filter circuit respectively. The RCD absorption circuit is connected between the transformer and the starting and auxiliary power supply circuit. The starting and auxiliary power supply circuit is connected between the input filter circuit and the RCD absorption circuit. The control circuit is connected with the starting and auxiliary power supply circuit. The feedback circuit is electrically connected with the second output filter circuit. The starting and auxiliary power supply circuit is coupled with the first output filter circuit and the second output filter circuit respectively. In such a manner, the small-volume high-power-density module power supply can reduce the starting current, the standby loss, and the low-load loss, and realize the product miniaturization and the high power supply conversion efficiency.
Description
Technical field
The utility model relates to the power-supply system field, particularly relates to a kind of small size high power density modular power source.
Background technology
At commercial Application environment such as instrument, communication, electric power, power-supply system wants cube little, and power density is high, and product is reliable, and the distributed power supply scheme of 48VDC output is to satisfy the optimal selection of this requirement.In distributed power supply system, generally the 48VDC busbar voltage need to be converted into the required voltage of each electronic equipment, the Voltage-outputs such as 24V, 12V, 5V, 3.3V are arranged usually; Power demand is more than 5W; The MOMEMS power supply is because reliability is high, and perfect heat-dissipating is convenient to install and is widely used.The design of the power supply product of small size high power density needs to choose at controller, design of transformer, and the Product Process aspect is different from conventional modular power source.During the selection of controller, minitype paster, function is integrated, and starting current is little is inevitable requirement, and conventional SOP-8 chip volume and function just do not satisfy its designing requirement.Reduce the volume of product, just must reduce the volume of transformer, iron loss and the copper loss of optimizing transformer can obtain best transformer model.Modular power source adopts the design of miniaturized component Surface Mounting Technology, has reached the purpose that reduces small product size, and power density reaches 25-50W/inch
3
At present, conventional manufacturer production be used for the power supply product of above-mentioned environment the time, generally have volume to be not easy to greatly install, product efficiency is low, the not high defective of the poor product reliability of technological design.
The utility model content
The technical problem that the utility model mainly solves is to provide a kind of small size high power density modular power source; can make starting current little; have the hiccups formula protection of short circuit; SKIP mode of operation loss when standby and low load is little; realized the product miniaturization; power supply conversion efficiency is high, stand-by power consumption is little, reliability and stability are good, meets the energy-conserving and environment-protective requirement.
for solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of small size high power density modular power source is provided, comprise: transformer, input filter circuit, the first output filter circuit, the second output filter circuit, feedback circuit, control circuit and startup and auxiliary power circuit, described transformer is coupled with the first output filter circuit and the second output filter circuit respectively, described startup and auxiliary power circuit are connected between input filter circuit and RCD absorbing circuit, described control circuit is connected with startup and auxiliary power circuit, described feedback circuit and the second output filter circuit are electrically connected, described startup and auxiliary power circuit are respectively at the first output filter circuit and the coupling of the second output filter circuit.
in preferred embodiment of the utility model, described control circuit comprises control chip, described control chip comprises the first pin, the second pin, the 3rd leads ends, the 4th pin, the 5th pin, the 6th pin, the 7th pin and the 8th pin, be connected with the first photoelectric coupling circuit on described the first pin, described the second pin is connected with startup and auxiliary power circuit with the 3rd pin, described the 4th pin is connected with the switch mosfet pipe, described the 5th pin ground connection, described the 6th pin is connected with filter circuit, described the 7th pin is connected with the 4th resistance and ground connection, described the 8th pin is connected with the 7th electric capacity and ground connection.
In preferred embodiment of the utility model, described the first filter circuit comprises the first diode, the first inductance, the first electric capacity and the second electric capacity, the anode of described the first diode is connected with transformer, negative electrode is connected with the first electric capacity with the first inductance, the described first inductance other end is connected to the first output, the two ends of described the second electric capacity are connected with the second output respectively at the first output, described the first electric capacity one end is connected with transformer, and the other end is connected between the first diode and the first inductance.
In preferred embodiment of the utility model, described the second filter circuit comprises the second diode, the second inductance, the 3rd electric capacity and the 4th electric capacity, the anode of described the second diode is connected with transformer, negative electrode is connected with the 3rd electric capacity with the second inductance, the described second inductance other end is connected to the 3rd output, the two ends of described the 4th electric capacity are connected with the 4th output respectively at the 3rd output, described the 3rd electric capacity one end is connected with transformer, and the other end is connected between the second diode and the second inductance.
in preferred embodiment of the utility model, described feedback circuit comprises the second photoelectric coupling circuit and error amplifying circuit, described error amplifying circuit comprises the first resistance, the second resistance, the 3rd resistance, the 5th electric capacity, the 6th electric capacity and source of stable pressure, described the first resistance one end is connected on output filter circuit, the other end is connected on the second resistance, described the second resistance other end ground connection, in parallel with source of stable pressure after described the 3rd resistance and the 5th capacitances in series, described the 6th electric capacity one end is connected with the 3rd resistance, the other end is connected with the 5th electric capacity, described source of stable pressure one end is connected between the first resistance and the second resistance, other end ground connection.
In preferred embodiment of the utility model, be connected with the RCD absorbing circuit between described transformer and startup and auxiliary power circuit.
The beneficial effects of the utility model are: the utility model small size high power density modular power source; realized the product miniaturization; be beneficial to processing and install; can make starting current little; have the hiccups formula protection of short circuit; SKIP mode of operation loss when standby and low load is little, and power supply conversion efficiency is high, stand-by power consumption is little, reliability and stability are good, meets the energy-conserving and environment-protective requirement.
Description of drawings
Fig. 1 is the structural representation of the utility model small size high power density modular power source one preferred embodiment;
In accompanying drawing, the mark of critical piece is as follows: 1, transformer, 2, RCD absorbing circuit, 3, input filter circuit, the 4, first output filter circuit, the 5, second output filter circuit, 6, feedback circuit, 7, control circuit, 8, startup and auxiliary power circuit, the 61, second optically coupled circuit, 62, error amplifying circuit, the 9, first optically coupled circuit.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that, protection range of the present utility model is made more explicit defining.
see also Fig. 1, a kind of small size high power density modular power source, comprise: transformer 1, RCD absorbing circuit 2, input filter circuit 3, the first output filter circuit 4, the second output filter circuit 5, feedback circuit 6, control circuit 7 and startup and auxiliary power circuit 8, described transformer 1 is coupled with the first output filter circuit 4 and the second output filter circuit 5 respectively, described RCD absorbing circuit 2 is connected between transformer 1 and startup and auxiliary power circuit 9, described startup and auxiliary power circuit 8 are connected between input filter circuit 3 and RCD absorbing circuit 2, described control circuit 7 is connected with startup and auxiliary power circuit 8, described feedback circuit 6 and the second output filter circuit 5 are electrically connected, described startup and auxiliary power circuit 8 are respectively at the first output filter circuit 4 and the second output filter circuit 5 couplings.
in addition, startup and auxiliary power circuit circuit 8 comprise: the 5th resistance R 3, the 6th resistance R a, rectifier diode Da and polar capacitor Ca arranged, the 5th resistance R 3 is connected with the second pin VIN end of control circuit, the Vcc of the 6th resistance R a one termination control circuit 5 holds and has polar capacitor Ca anodal, another terminating diode Da negative electrode, there is polar capacitor Ca negative pole to connect 8 ends and the ground connection of transformer T1, diode Da anode connects 7 ends of transformer T1, auxiliary power circuit 7 obtains burning voltage by foregoing circuit, give control circuit 5 power supplies, thereby make control chip working properly.
in addition, described control circuit 7 comprises control chip, described control chip comprises the first pin COMP, the second pin VIN, the 3rd pin VCC, the 4th pin Vout, the 5th pin GND, the 6th pin CS, the 7th pin RT and the 8th pin SS, be connected with the first photoelectric coupling circuit 9 on described the first pin COMP, described the second pin VIN is connected with startup and auxiliary power circuit 8 with the 3rd pin VCC, described the 4th pin Vout is connected with switching tube, in the present embodiment, switching tube is metal oxide half field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET), described the 5th pin GND ground connection, described the 6th pin CS is connected with filter circuit, described the first pin RT is connected with resistance R T and ground connection, described the 8th pin SS is connected with the 8th capacitor C ss and ground connection, control chip COMP termination the 7th resistance R c one end of control chip and the collector electrode of phototriode VT1, the emitter terminal ground connection of the 8th capacitor C b and phototriode VT1, the 7th resistance R c and the 9th capacitor C c series connection, the second pin VIN connects one the 5th resistance R 3 to input voltage, the 3rd pin VCC connects and starts storage capacitor and auxiliary power supply circuit, the 6th pin CS connects the filter circuit of the 8th resistance R s1 and the tenth capacitor C s1 composition, control chip RT connects one the 4th resistance R t ground connection.The 8th pin SS connects one the 7th capacitor C ss to ground.The 4th pin Vout of control chip is used for producing the driving signal that makes a switch conduction cut-off; main power circuit is completed the energy transmission that inputs to output; control circuit 7 choose low start power consumption, carry under-voltage protection, slowly start, the control chip of underload SKIP mode of operation, it is encapsulated as MSOP-8.The switching frequency of product reaches the 400KHz left and right.The design of transformer 1 is the key point that improves product efficiency, reduces small product size, optimized production process, the transformer sense value design conventional method that the below adopts when being optimizing product efficient.
Transformer 1 product adopts the anti-topology that swashs, and can decide the working method of transformer by the size of magnetic core air gap amount during real work, is illustrated in fig. 2 shown below, and can be divided into total energy transfer mode (DCM) and incomplete energy transfer mode (CCM) dual mode.In the total energy transfer mode, the transformer primary side inductance value is less, to store enough energy for guaranteeing output power transformer, make the peak current on former limit larger, loss meeting on switching tube, input capacitance and sample resistance strengthens like this, simultaneously according to inductance principle (L=Vt/ △ I) when product plays machine, circuit output voltage is not also set up, feedback control loop is in open loop situations, the weber in cycle that is applied to transformer primary side is much bigger when ratio works, thereby cause the large dynamo-electric stream that rises, can not satisfy the requirement that reduces product start impulse current; Select incomplete energy transfer mode, can be according to the need of work of product, guarantee that transformer rises under machine and the undersaturated condition of when overload magnetic flux density, the DC component of former limit operating current and the ratio of alternating current component are set, calculate former limit sense value and magnetic core air gap amount.
in addition, the originating party ripple that output rectifier and filter produces transformer T1 passes through rectifying and wave-filtering afterwards as output voltage, output outside the first output filter circuit 4, by the time multichannel output voltage, described the first filter circuit 4 comprises the first diode Do(n), the first inductance L o(n), the first capacitor C o(n) and the second capacitor C p(n), described the first diode Do(n) anode is connected with transformer, negative electrode and the first inductance L o(n) with the first capacitor C o(n) be connected, described the first inductance L o(n) other end is connected to the first output, described the second capacitor C p(n) two ends are connected with the second output respectively at the first output, described the first capacitor C o(n) end is connected with transformer, the other end is connected to the first diode Do(n) and the first inductance L o(n) between, described the second filter circuit 5 comprises the second diode Do1, the second inductance L o1, the 3rd capacitor C o1 and the 4th capacitor C p1, the anode of described the second diode Do1 is connected with transformer, negative electrode is connected with the 3rd capacitor C o1 with the second inductance L o1, the described second inductance L o1 other end is connected to the 3rd output, the two ends of described the 4th capacitor C p1 are connected with the 4th output respectively at the 3rd output, described the 3rd capacitor C o1 one end is connected with transformer, the other end is connected between the second diode Do and the second inductance L o.
in addition, described feedback circuit 6 comprises the second photoelectric coupling circuit 61 and error amplifying circuit 62, the second photoelectric coupling circuit comprises light-emitting diode D1, resistance R d and biasing resistor Rbias, resistance R d connects with light-emitting diode D1, biasing resistor Rbias light-emitting diode D1 is in parallel, the second photoelectric coupling circuit 61 is used for realizing isolation and the transmission of signal, error amplifying circuit 62 comprises the first resistance R 1, the 3rd resistance R _ f, the 5th capacitor C f, the 6th capacitor C f0, accurate source of stable pressure and the second resistance R 2, the first resistance R 1 one termination output one ends, another termination second resistance R 2 one ends, the second resistance R 2 other end ground connection, the 3rd resistance R _ f and the 5th capacitor C f series connection, and then the 6th capacitor C f0 in parallel, the reference edge R of the one accurate source of stable pressure of termination, its negative electrode of another termination K end.R termination first resistance R 1 of accurate source of stable pressure and the tie point of the second resistance R 2, precisely source of stable pressure plus earth.Feedback circuit 6 is mainly used in the output voltage after the output rectifier and filter rectifying and wave-filtering and reference voltage source are compared, and the error signal of generation is given control circuit 7 through light-coupled isolation, thereby proofreaies and correct output voltage values.
the specific works principle of the utility model small size high power density modular power source is as follows: enter the voltage input filter circuit, the filtering direct voltage that obtains is connected on control chip by resistance R 3, when input voltage surpasses the inside under-voltage protection thresholding of control chip, begin to the startup storage capacitor charging that is connected to the first pin VCC, to have reduced the surge current of machine, when the first pin VCC reaches in operating voltage and buffer capacitor SS rising process, control circuit 5 has and drives the signal generation, transformer T1 magnetic field begins energy storage, when power transfer is carried out in the anti-work that swashs of transformer 1 beginning, the magnetic field energy of transformer 1 discharges and makes output obtain voltage, work through a plurality of cycles, feedback circuit begins steady operation, it is stable that output voltage reaches, auxiliary power circuit is given the first pin VCC power supply simultaneously, make circuit enter normal mode of operation, and in figure, output rectifier and filter is realized the rectifying and wave-filtering function, obtain stable low ripple output voltage, voltage stabilizing circuit is made comparisons output voltage with reference voltage source, the error signal that produces is sent and the control circuit part through optical coupling isolation circuit, thereby correction output voltage values.
Be different from prior art; the utility model small size high power density modular power source; realized the product miniaturization; be beneficial to processing and install; can make starting current little, have the hiccups formula protection of short circuit, the SKIP mode of operation loss when standby and low load is little; power supply conversion efficiency is high, stand-by power consumption is little, reliability and stability are good, meets the energy-conserving and environment-protective requirement.
The above is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.
Claims (6)
1. small size high power density modular power source, it is characterized in that, comprise: transformer, input filter circuit, the first output filter circuit, the second output filter circuit, feedback circuit, control circuit and startup and auxiliary power circuit, described transformer is coupled with the first output filter circuit and the second output filter circuit respectively, described startup and auxiliary power circuit are connected between input filter circuit and RCD absorbing circuit, described control circuit is connected with startup and auxiliary power circuit, described feedback circuit and the second output filter circuit are electrically connected, described startup and auxiliary power circuit are respectively at the first output filter circuit and the coupling of the second output filter circuit.
2. small size high power density modular power source according to claim 1, it is characterized in that, described control circuit comprises control chip, described control chip comprises the first pin, the second pin, the 3rd leads ends, the 4th pin, the 5th pin, the 6th pin, the 7th pin and the 8th pin, be connected with the first photoelectric coupling circuit on described the first pin, described the second pin is connected with startup and auxiliary power circuit with the 3rd pin, described the 4th pin is connected with switching tube, described the 5th pin ground connection, described the 6th pin is connected with filter circuit, described the 7th pin is connected with the 4th resistance and ground connection, described the 8th pin is connected with the 7th electric capacity and ground connection.
3. small size high power density modular power source according to claim 1, it is characterized in that, described the first filter circuit comprises the first diode, the first inductance, the first electric capacity and the second electric capacity, the anode of described the first diode is connected with transformer, negative electrode is connected with the first electric capacity with the first inductance, the described first inductance other end is connected to the first output, the two ends of described the second electric capacity are connected with the second output respectively at the first output, described the first electric capacity one end is connected with transformer, the other end is connected between the first diode and the first inductance.
4. small size high power density modular power source according to claim 1, it is characterized in that, described the second filter circuit comprises the second diode, the second inductance, the 3rd electric capacity and the 4th electric capacity, the anode of described the second diode is connected with transformer, negative electrode is connected with the 3rd electric capacity with the second inductance, the described second inductance other end is connected to the 3rd output, the two ends of described the 4th electric capacity are connected with the 4th output respectively at the 3rd output, described the 3rd electric capacity one end is connected with transformer, the other end is connected between the second diode and the second inductance.
5. small size high power density modular power source according to claim 1, it is characterized in that, described feedback circuit comprises the second photoelectric coupling circuit and error amplifying circuit, described error amplifying circuit comprises the first resistance, the second resistance, the 3rd resistance, the 5th electric capacity, the 6th electric capacity and source of stable pressure, described the first resistance one end is connected on output filter circuit, the other end is connected on the second resistance, described the second resistance other end ground connection, in parallel with source of stable pressure after described the 3rd resistance and the 5th capacitances in series, described the 6th electric capacity one end is connected with the 3rd resistance, the other end is connected with the 5th electric capacity, described source of stable pressure one end is connected between the first resistance and the second resistance, other end ground connection.
6. small size high power density modular power source according to claim 1, is characterized in that, is connected with the RCD absorbing circuit between described transformer and startup and auxiliary power circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220613675 CN202931200U (en) | 2012-11-20 | 2012-11-20 | Small-volume high-power-density module power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220613675 CN202931200U (en) | 2012-11-20 | 2012-11-20 | Small-volume high-power-density module power supply |
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| CN202931200U true CN202931200U (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220613675 Expired - Fee Related CN202931200U (en) | 2012-11-20 | 2012-11-20 | Small-volume high-power-density module power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105013197A (en) * | 2015-06-03 | 2015-11-04 | 上海神农节能环保科技股份有限公司 | Efficient mechanical vapor recompression (MVR) evaporator with resource recycling function |
| CN107733212A (en) * | 2017-10-26 | 2018-02-23 | 东莞启益电器机械有限公司 | Has the direct current of power saving function with exchanging output circuit |
-
2012
- 2012-11-20 CN CN 201220613675 patent/CN202931200U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105013197A (en) * | 2015-06-03 | 2015-11-04 | 上海神农节能环保科技股份有限公司 | Efficient mechanical vapor recompression (MVR) evaporator with resource recycling function |
| CN107733212A (en) * | 2017-10-26 | 2018-02-23 | 东莞启益电器机械有限公司 | Has the direct current of power saving function with exchanging output circuit |
| CN107733212B (en) * | 2017-10-26 | 2024-04-16 | 东莞启益电器机械有限公司 | DC and AC output circuit with energy-saving function |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20131120 |