CN203086360U - Energy-saving high-frequency switching power supply - Google Patents
Energy-saving high-frequency switching power supply Download PDFInfo
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- CN203086360U CN203086360U CN 201320001945 CN201320001945U CN203086360U CN 203086360 U CN203086360 U CN 203086360U CN 201320001945 CN201320001945 CN 201320001945 CN 201320001945 U CN201320001945 U CN 201320001945U CN 203086360 U CN203086360 U CN 203086360U
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Abstract
The utility model discloses an energy-saving high-frequency switching power supply. The energy-saving high-frequency switching power supply includes a filtering circuit module, a rectifying and filtering circuit module, a high-frequency flyback conversion circuit module, an output rectifying and filtering module, a feedback circuit module, a control circuit module and an auxiliary circuit module. The energy-saving high-frequency switching power supply is characterized in that the high-frequency flyback conversion circuit module includes a capacitor which is connected in parallel with the primary coil of a high-frequency transformer, an energy conversion coil and a switching tube; the capacitor, the energy conversion coil and the switching tube form a discharge loop; and the energy conversion coil can be wound on the iron core of the high-frequency transformer. Because the high-frequency flyback conversion circuit module is improved, an equivalent resistor is replaced with the energy conversion coil in the discharge loop, energy which is consumed in a form of heat energy in the prior art can be converted into magnetic energy through the energy conversion coil, and the magnetic energy is outputted; and the energy-saving high-frequency switching power supply of the utility model is advantageous in energy recycle, energy-saving and environmental-protection properties, reduced emitted heat, and prolonged service life.
Description
Technical field
The utility model relates to a kind of Switching Power Supply, specifically is meant a kind of high frequency switch power.
Background technology
Main circuit in traditional hf switching power supply: the overall process from AC network is imported, direct current is exported comprises: 1, input filter: its effect is that the clutter that electrical network exists is filtered, and the clutter that also hinders the generation of this machine simultaneously feeds back to public electric wire net; 2, rectification and filtering: with the direct rectification in grid alternating current source is more level and smooth direct current, for the next stage conversion; 3, high frequency inverse-excitation converting circuit module: the direct current after the rectification is become high-frequency alternating current, and this is the core of high frequency switch power, and frequency is high more, and volume, weight are more little with the ratio of power output; 4, output rectification and filtering:, provide reliable and stable DC power supply according to the load needs.Aspect control circuit; take a sample from output on the one hand; through comparing with established standards; remove control inverter then, change its frequency or pulsewidth, it is stable to reach output; on the other hand; according to the data that test circuit provides, differentiate through protective circuit, provide control circuit that complete machine is carried out various safeguard measures.Traditional hf switching power supply is pressed the TRC control principle, and three kinds of modes are arranged: one, pulse width modulation (Pulse Width Modulation is abbreviated as PWM): switch periods is constant, by changing the mode that pulse duration changes duty ratio; Two, pulse frequency modulated (Pulse Frequency Modulation is abbreviated as PFM): the conducting pulse duration is constant, by changing the mode that the switch operating frequency changes duty ratio; Three, hybrid modulation: conducting pulse duration and switch operating frequency are all fixing, the mode that can both change each other, and it is the mixing of above two kinds of modes.High frequency switch power does not need to increase substantially switching speed just can drop to zero to switching loss in theory, and noise is also little.
But, comprise high frequency inverse-excitation converting circuit module in traditional hf switching power supply, the electric capacity that in high frequency inverse-excitation converting circuit module, includes the parallel connection of primary windings of high frequency transformer, be parallel with resistance on this electric capacity, when working with high-frequency mode, this resistance very easily generates heat, and lot of energy has been depleted with the form of heat and has not only burnt out circuit board easily, but also has wasted the energy.
The utility model content
In order to overcome above-mentioned deficiency, the purpose of this utility model is to provide the energy-saving high frequency switch power of a kind of energy-conserving and environment-protective, long service life.
For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of energy-saving high frequency switch power, include the current rectifying and wave filtering circuit module, control circuit module, switching tube, high frequency transformer, the output rectification filtering module, described current rectifying and wave filtering circuit module output connects the primary coil of described high frequency transformer, described output rectification filtering module links to each other with the secondary coil of described high frequency transformer, and described switching tube is between the primary coil of dc output end that is connected described current rectifying and wave filtering circuit module under the described control circuit module control and described high frequency transformer; Also comprise high frequency inverse-excitation converting circuit module;
Described high frequency inverse-excitation converting circuit module comprises storage capacitor C3, power conversion coil N3 and the switching tube (S1) with the parallel connection of primary windings of high frequency transformer, and described storage capacitor C3, power conversion coil N3 and switching tube (S1) constitute discharge loop.Described power conversion coil N3 is on the iron core of described high frequency transformer.
Described high frequency inverse-excitation converting circuit module comprises the primary coil with described high frequency transformer, storage capacitor C3, power conversion coil and described switching tube, the source electrode of the described switching tube of homophase termination of the primary coil of described high frequency transformer, the drain electrode of described switching tube connects the incorgruous end of described power conversion coil, the utmost point of the described storage capacitor C3 of termination in the same way of described power conversion coil, another utmost point of described storage capacitor C3 connects the in-phase end of the primary coil of described high frequency transformer, and the grid of described switching tube connects the control signal output ends of described control circuit module.
Further, in the above-mentioned energy-saving high frequency switch power: be provided with diode D5 between the out-phase end of the end in the same way of described power conversion coil and the primary coil of described high frequency transformer, the described diode D5 phase utmost point connects the end in the same way of described power conversion coil.
Further, in the above-mentioned energy-saving high frequency switch power: also be provided with diode D10 between the drain electrode of the incorgruous end of described power conversion coil and described switching tube, the anode of described diode D10 connects the drain electrode of described switching tube.
Further, in the above-mentioned energy-saving high frequency switch power: also comprise the feedback circuit module, described feedback circuit module is connected between described output rectification filtering module and the described control circuit plate module, and described control circuit plate module is gathered and sent to described feedback circuit module to the output voltage of described output rectification filtering module.
Further, in the above-mentioned energy-saving high frequency switch power: described feedback circuit module includes precision voltage regulator U1 and linear optical coupling U2, divider resistance R4, divider resistance R5, current-limiting resistance R6 and filter capacitor C7;
Described divider resistance R4 and divider resistance R5 are connected between described output rectification filtering module output and the ground, the end ground connection of divider resistance R5;
The negative electrode of described precision voltage regulator U1 connects tie point between described divider resistance R4 and the divider resistance R5 by filter capacitor C7, the reference of described precision voltage regulator U1 extremely directly with described divider resistance R4 and divider resistance R5 between tie point link to each other the plus earth of described precision voltage regulator U1;
The anode of the input of described linear optical coupling U2 connects described output rectification filtering module output by the described current-limiting resistance of contacting, and the negative electrode of the negative electrode of the input of described linear optical coupling U2 and described precision voltage regulator U1 joins; The described control circuit module of output termination of described linear optical coupling U2.
Further, in the above-mentioned energy-saving high frequency switch power: described control circuit module comprises control chip UC3824, the 1st, 2 pin of control chip UC3824 link to each other with the output of described linear optical coupling U2 respectively, and the 6th pin output control signal of control chip UC3824 links to each other with the grid of described switching tube.
Further, in the above-mentioned energy-saving high frequency switch power: described output rectification filtering module comprises rectifier diode D6 and rectifier diode D7, filter capacitor C4, C5, C6, resistance R 3 and filter inductance L2;
The anode of described rectifier diode D6 and rectifier diode D7 all connects the in-phase end of described high frequency transformer secondary coil, the out-phase end ground connection of described high frequency transformer secondary coil;
Described filter capacitor C4 and resistance R 3 polyphones, another utmost point of described filter capacitor C4 connects the anode of described rectifier diode D6 and rectifier diode D7, the negative electrode of described rectifier diode D6 of another termination of resistance R 3 and rectifier diode D7;
The negative electrode of described rectifier diode D6 and rectifier diode D7 connects load by described filter inductance L2;
Described filter capacitor C5, C6 are respectively the both sides of described filter inductance L2 ground connection.
Further, in the above-mentioned energy-saving high frequency switch power: between described current rectifying and wave filtering circuit module and alternating current input, also be provided with the input filter circuit module; Described input filter circuit module comprises the anti-series mode interference circuit that suppresses normal noise and suppresses the anti-common mode disturbances circuit formation that common-mode noise is disturbed.
The beneficial effects of the utility model are: because high frequency inverse-excitation converting circuit module is improved, in discharge loop, equivalent resistance replaced with the power conversion coil, thereby convert the energy that traditional form with heat energy loses to magnetic energy laggard line output by the power conversion coil, not only realized the utilization again of energy, characteristics with energy-conserving and environment-protective, but also because of the reduction of caloric value, thereby prolonged useful life of energy-saving high frequency switch power.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Fig. 1 is an electric theory diagram of the present utility model;
Fig. 2 is an electrical schematic diagram shown in Figure 1.
Among the figure: 1, input filter circuit module; 2, current rectifying and wave filtering circuit module; 3, high frequency inverse-excitation converting circuit module; 4, output rectification filtering module; 5, feedback circuit module; 6, control circuit module.
Embodiment
As Fig. 1, shown in 2, present embodiment is a kind of energy-saving high frequency switch power, include input filter circuit module 1, current rectifying and wave filtering circuit module 2, high frequency inverse-excitation converting circuit module 3, output rectification filtering module 4, feedback circuit module 5, the auxiliary circuit module of control circuit module 6 and control circuit module, alternating current is after input filter circuit module 1 low-pass filtering, produce direct current through current rectifying and wave filtering circuit module 2, one the tunnel through high frequency inverse-excitation converting circuit module 3, again through 4 outputs of output rectification filtering module, output voltage after 4 rectifications of 5 pairs of output of feedback circuit module rectification filtering module is sampled and is transmitted control circuit module 6, the work of the switching tube S1 of control circuit module 6 control high frequency inverse-excitation converting circuit modules 3.
Present embodiment medium-high frequency inverse-excitation converting circuit module 3 is crucial, comprise primary coil N1, storage capacitor C3, power conversion coil N3 and switching tube S1 with high frequency transformer, high frequency inverse-excitation converting circuit module comprises storage capacitor C3, power conversion coil N3 and the switching tube S1 with the parallel connection of primary windings of high frequency transformer, and storage capacitor C3, power conversion coil N3 and switching tube S1 constitute discharge loop.Power conversion coil N3 is on the iron core of described high frequency transformer.Power conversion coil N3 can directly be coupled to output like this, reduces loss, reduces cost.
The source electrode of the homophase termination switching tube S1 of the primary coil N1 of high frequency transformer, the drain electrode of switching tube S1 connects the incorgruous end of power conversion coil N3, the utmost point of the storage capacitor of the termination in the same way C3 of power conversion coil N3, another utmost point of storage capacitor C3 connects the in-phase end of the primary coil N1 of high frequency transformer, the control signal output ends of the grid connection control circuit module 6 of switching tube S1.
Also comprise two diode D5 and D10 in high frequency inverse-excitation converting circuit module 3, be provided with diode D5 between the out-phase end of the end in the same way of power conversion coil N3 and the primary coil N1 of high frequency transformer, diode D5 anode connects the end in the same way of described power conversion coil N3.Be provided with diode D10 between the drain electrode of the incorgruous end of power conversion coil N3 and switching tube S1, the anode of diode D10 connects the drain electrode of switching tube S1.
Here high frequency inverse-excitation converting circuit module 3 comprises the storage capacitor C3 in parallel with the primary coil N1 of high frequency transformer, power conversion coil N3 and switching tube S1, storage capacitor C3, diode D10, power conversion coil N3 and switching tube S1 constitute discharge loop, and power conversion coil N3 is on the iron core of high frequency transformer, control circuit module 6 adopts the UC3842 chip, switching tube S1 is electrically connected with UC3842 pin of chip 6 by a diode D9, is controlled by the control signal that the UC3842 chip produces.
Input filter circuit module 1 is arranged on before the current rectifying and wave filtering circuit module, and the input AC electricity is carried out low-pass filtering.Input filter circuit 1 in the present embodiment is to be made of anti-series mode interference circuit and anti-common mode disturbances circuit, wherein anti-series mode interference circuit is to be made of filter capacitor C16, filter capacitor C15, be used to suppress normal noise, wherein filter capacitor C16 is connected across between the zero line and live wire of input AC electricity, just between L line and the N line, filter capacitor C15 is connected across the input of the rectifier bridge of current rectifying and wave filtering circuit.
Anti-common mode disturbances circuit is to be made of filter capacitor C14, filter capacitor C13, filter inductance L1, being used to suppress common-mode noise disturbs, filter inductance L1 is made up of two coils of conjugation, each coil is connected in respectively on the L line and N line of input AC electricity, and filter capacitor C14, filter capacitor C13 are connected between the L line and N line and ground of input AC electricity.
The current rectifying and wave filtering circuit module comprises the rectifier bridge be made up of rectifier diode D1-D4 and is made up of the filter circuit that filter capacitor C1 and filter capacitor C2 form in the present embodiment, at the output of rectifier bridge D1-D4, by filter capacitor C1 and filter capacitor C2 parallel circuits ground connection.
Output rectification filtering module 4 mainly is to be made of two rectifier diode D6, D7, a filter capacitor C4 and an inductance L 2 in the present embodiment, two rectifier diode D6, D7 and capacitor C 4 in parallel then series connection with inductance L 2.The anode of rectifier diode D6 and rectifier diode D7 all connects the in-phase end of high frequency transformer secondary coil N2, the out-phase end ground connection of high frequency transformer secondary coil N2.Filter capacitor C4 and resistance R 3 polyphones, another utmost point of filter capacitor C4 connects the anode of rectifier diode D6 and rectifier diode D7, another termination rectifier diode D6 of resistance R 3 and the negative electrode of rectifier diode D7.The negative electrode of rectifier diode D6 and rectifier diode D7 connects load by filter inductance L2.Filter capacitor C5, C6 are respectively the both sides of described filter inductance L2 ground connection.
In circuit module, control chip is in the UC3842 chip, and pin 1 is the output of internal error amplifier in the UC3842 chip, and this pin and pin 2 are connected to feedback circuit usually, to determine the gain and the frequency response of error amplifier; Pin 2 is feedback voltage inputs, and sampling voltage is added to the inverting input of error amplifier, and the reference voltage (being 2.5 V) with in-phase input end compares again, produces error voltage; Pin 3 is that the current detecting input cooperates with sample resistance, constitutes current foldback circuit, when supply voltage is unusual, the electric current of power switch pipe increases, when the voltage on the sample resistance surpassed 1V, the UC3842 chip just stopped output, can protect power switch pipe effectively; Pin 4 external saw-toothed oscillator external definition resistance and timing capacitors, the decision frequency of oscillation; Pin 5 ground connection; Pin 6 is outputs, and this pin is the output of totem pillar, can provide ± peak current of 1A, can drive bipolar-type power switching tube or MOSFET pipe; Pin 7 connects power supply, and when supply power voltage was lower than 16 V, the UC3842 chip was not worked, and power consumption is below 1 mA; Input voltage can obtain from the high pressure step-down by a big resistance resistance.Behind the chip operation, input voltage can be lower than 10V and then quit work in 10～30 V fluctuation, and power consumption is about 15mA during work; Pin 8 is reference voltage output, exportable accurate 5 V reference voltages, and electric current can reach 50mA, and the voltage rate of UC3842 chip can reach 0.01%.
The reference of TL341 extremely directly with divider resistance R4 and divider resistance R5 between tie point link to each other the plus earth of precision voltage regulator TL341;
Present embodiment neutral line optocoupler U2 is PC817, and PC817 is the linear optical coupling of the DIP encapsulation of SHARP.The anode of the light-emitting diode of the input of PC817 meets R6 by the polyphone current-limiting resistance and connects output rectification filtering module output, the negative electrode of linear optical coupling PC817 input light-emitting diode and the negative electrode of precision voltage regulator TL341 join, the output connection control circuit module of linear optical coupling PC817.。
Operation principle: the foregoing description is a core control part with UC3842, designs a AC 220V input.The single-ended flyback switching power supply of DC24V output.Switching power source control circuit is a voltage, current double closed-loop control system.The amplitude-frequency characteristic of converter becomes first order pole by duopole, and it is big therefore to stablize amplitude, has good frequency response characteristic.During work, the voltage of current rectifying and wave filtering circuit module output is after resistance R 1 step-down, and what flow to the UC3842 chip draws angle 7, when voltage reaches the starting resistor threshold value of UC3842 chip, the UC3842 chip is started working and driving pulse is provided, and 6 output pull switch plumbers do by pin.Along with the startup of UC3842 chip, the work of resistance R 1 is also just basic to be finished, the UC3842 chip mainly comprise the higher-order of oscillation, error ratio, under-voltage locking, current sampling comparison, pulse-width modulation functional circuit such as latch.UC3842 is mainly used in low capacity Switching Power Supply in the high frequency, the traditional off-line type anti exciting converter circuit that constitutes with its is when driving the single-ended switch of isolating output, usually the reverse input end with error comparator compares through signal and the inner 2.5V benchmark that electric resistance partial pressure obtains by the feedback winding, the output of error comparator and reverse input end are connected into the PI compensating network, the UC3842 chip compares by the output and the sampled voltage of the error comparator in it, thereby the duty ratio of control PWM sequence reaches the stable purpose of circuit.
The maximum characteristics of this patent are with in the high frequency inverse-excitation converting circuit module, in discharge loop, equivalent resistance replaced with the power conversion coil, thereby convert the energy that traditional form with heat energy loses to magnetic energy laggard line output by the power conversion coil, not only realized the utilization again of energy, characteristics with energy-conserving and environment-protective, but also because of the reduction of caloric value, thereby prolonged useful life of energy-saving high frequency switch power.
In a word; though the utility model has been enumerated above-mentioned preferred implementation; but should illustrate; though those skilled in the art can carry out various variations and remodeling; unless such variation and remodeling have departed from scope of the present utility model, otherwise all should be included in the protection range of the present utility model.
Claims (10)
1. energy-saving high frequency switch power, include current rectifying and wave filtering circuit module, control circuit module, switching tube, high frequency transformer, output rectification filtering module, described current rectifying and wave filtering circuit module output connects the primary coil (N1) of described high frequency transformer, described output rectification filtering module links to each other with the secondary coil (N2) of described high frequency transformer, and described switching tube is connected between the dc output end of described current rectifying and wave filtering circuit module and the primary coil of described high frequency transformer (N1) under described control circuit module control; It is characterized in that: also comprise high frequency inverse-excitation converting circuit module (3);
Described high frequency inverse-excitation converting circuit module comprises storage capacitor C3, power conversion coil N3 and the switching tube (S1) with the parallel connection of primary windings of high frequency transformer, and described storage capacitor C3, power conversion coil N3 and switching tube (S1) constitute discharge loop.
2. energy-saving high frequency switch power according to claim 1 is characterized in that: described power conversion coil N3 is on the iron core of described high frequency transformer.
3. energy-saving high frequency switch power according to claim 1 and 2, it is characterized in that: described high frequency inverse-excitation converting circuit module comprises the primary coil (N1) with described high frequency transformer, storage capacitor C3, power conversion coil (N3) and described switching tube (S1), the source electrode of the described switching tube of homophase termination (S1) of the primary coil of described high frequency transformer (N1), the drain electrode of described switching tube (S1) connects the incorgruous end of described power conversion coil (N3), the utmost point of the described storage capacitor C3 of termination in the same way of described power conversion coil (N3), another utmost point of described storage capacitor C3 connects the in-phase end of the primary coil (N1) of described high frequency transformer, and the grid of described switching tube (S1) connects the control signal output ends of described control circuit module (7).
4. energy-saving high frequency switch power according to claim 3, it is characterized in that: be provided with diode D5 between the out-phase end of the end in the same way of described power conversion coil (N3) and the primary coil (N1) of described high frequency transformer, the described diode D5 phase utmost point connects the end in the same way of described power conversion coil (N3).
5. energy-saving high frequency switch power according to claim 3, it is characterized in that: also be provided with diode D10 between the drain electrode of the incorgruous end of described power conversion coil (N3) and described switching tube (S1), the anode of described diode D10 connects the drain electrode of described switching tube (S1).
6. energy-saving high frequency switch power according to claim 3, it is characterized in that: also comprise feedback circuit module (5), described feedback circuit module (5) is connected between described output rectification filtering module (4) and the described control circuit plate module (7), and described control circuit plate module (7) is gathered and sent to described feedback circuit module (5) to the output voltage of described output rectification filtering module (4).
7. energy-saving high frequency switch power according to claim 6 is characterized in that: described feedback circuit module (5) includes precision voltage regulator U1 and linear optical coupling U2, divider resistance R4, divider resistance R5, current-limiting resistance R6 and filter capacitor C7;
Described divider resistance R4 and divider resistance R5 are connected between described output rectification filtering module (4) output and the ground, the end ground connection of divider resistance R5;
The negative electrode of described precision voltage regulator U1 connects tie point between described divider resistance R4 and the divider resistance R5 by filter capacitor C7, the reference of described precision voltage regulator U1 extremely directly with described divider resistance R4 and divider resistance R5 between tie point link to each other the plus earth of described precision voltage regulator U1;
The anode of the input of described linear optical coupling U2 connects described output rectification filtering module (4) output by the described current-limiting resistance of contacting, and the negative electrode of the negative electrode of the input of described linear optical coupling U2 and described precision voltage regulator U1 joins; The described control circuit module of output termination (6) of described linear optical coupling U2.
8. energy-saving high frequency switch power according to claim 7, it is characterized in that: described control circuit module comprises control chip UC3824, the 1st, 2 pin of control chip UC3824 link to each other with the output of described linear optical coupling U2 respectively, and the 6th pin output control signal of control chip UC3824 links to each other with the grid of described switching tube (S1).
9. energy-saving high frequency switch power according to claim 3 is characterized in that: described output rectification filtering module (4) comprises rectifier diode D6 and rectifier diode D7, filter capacitor C4, C5, C6, resistance R 3 and filter inductance L2;
The anode of described rectifier diode D6 and rectifier diode D7 all connects the in-phase end of described high frequency transformer secondary coil (N2), the out-phase end ground connection of described high frequency transformer secondary coil (N2);
Described filter capacitor C4 and resistance R 3 polyphones, another utmost point of described filter capacitor C4 connects the anode of described rectifier diode D6 and rectifier diode D7, the negative electrode of described rectifier diode D6 of another termination of resistance R 3 and rectifier diode D7;
The negative electrode of described rectifier diode D6 and rectifier diode D7 connects load by described filter inductance L2;
Described filter capacitor C5, C6 are respectively the both sides of described filter inductance L2 ground connection.
10. energy-saving high frequency switch power according to claim 3 is characterized in that: also be provided with input filter circuit module (1) between described current rectifying and wave filtering circuit module and alternating current input; Described input filter circuit module (1) comprises the anti-series mode interference circuit that suppresses normal noise and suppresses the anti-common mode disturbances circuit formation that common-mode noise is disturbed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320001945 CN203086360U (en) | 2013-01-04 | 2013-01-04 | Energy-saving high-frequency switching power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320001945 CN203086360U (en) | 2013-01-04 | 2013-01-04 | Energy-saving high-frequency switching power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840670A (en) * | 2013-01-04 | 2014-06-04 | 李珏莹 | Energy-saving type high-frequency switching power source |
| CN111600477A (en) * | 2020-06-30 | 2020-08-28 | 敏业信息科技（上海）有限公司 | Noise suppression circuit for reinjection cancellation |
-
2013
- 2013-01-04 CN CN 201320001945 patent/CN203086360U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840670A (en) * | 2013-01-04 | 2014-06-04 | 李珏莹 | Energy-saving type high-frequency switching power source |
| CN111600477A (en) * | 2020-06-30 | 2020-08-28 | 敏业信息科技（上海）有限公司 | Noise suppression circuit for reinjection cancellation |
| CN111600477B (en) * | 2020-06-30 | 2023-04-25 | 敏业信息科技（上海）有限公司 | Noise suppression circuit for reinjection cancellation |
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Granted publication date: 20130724 Termination date: 20160104 |