CN203278657U - Switching power supply - Google Patents
Switching power supply Download PDFInfo
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- CN203278657U CN203278657U CN 201320235961 CN201320235961U CN203278657U CN 203278657 U CN203278657 U CN 203278657U CN 201320235961 CN201320235961 CN 201320235961 CN 201320235961 U CN201320235961 U CN 201320235961U CN 203278657 U CN203278657 U CN 203278657U
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- power supply
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- rectification
- switching power
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Abstract
The utility model discloses a switching power supply which comprises a main circuit, a control circuit and an auxiliary power supply. The main circuit comprises an impact current amplitude limiting unit, an input filter unit, a rectification and filtering unit, an inversion unit and an output rectification and filtering unit, wherein the impact current amplitude limiting unit limits impact current at the inlet side in the energized moment, the input filter unit is used for filtering existing clutters in the electrical network and obstructing feedback of locally-generated clutters to the electrical network, the rectification and filtering unit directly rectifies ac power supply of the electrical network into dc, the inversion unit converts rectified dc into high-frequency ac, and the output rectification and filtering unit provides stable and reliable dc power supply according to requirements of load. The control circuit comprises a clock oscillator, a PWM (Pulse-Width Modulation) circuit and a drive circuit which are connected successively. The drive circuit is connected with the inversion unit. The switching power supply of the utility model has the advantages including safe and reliable performance, low power consumption, high conversion rate, and convenience in maintenance for failure equipment.
Description
Technical field
The utility model relates to technical field of electronic equipment, is specifically related to a kind of Switching Power Supply.
Background technology
Power supply is that various electronic equipments must obligato part, and can its performance quality be directly connected to the technical indicator of electronic equipment and work safely and reliably.Because the Switching Power Supply volume and weight only has 20%-30% of linear power supply, therefore it has become the main product of stabilized voltage power supply at present.The maintenance of electronic equipment electric fault in line with principle from easy to difficult, is all first to start with from power supply basically, after definite its power supply is normal, then carry out the maintenance at other positions, and power failure accounts for the great majority of electronic equipment electric fault.
The utility model content
The utility model has overcome the deficiencies in the prior art, and a kind of safe and reliable Switching Power Supply is provided.
Consider the problems referred to above of prior art, according to an aspect of the present utility model, for solving above-mentioned technical problem, the utility model by the following technical solutions:
A kind of Switching Power Supply comprises main circuit, control circuit, accessory power supply;
Described main circuit comprises:
Impulse current amplitude limit unit is for the impulse current that limits the moment input side that switches on power;
The input filter unit, the clutter that is used for filtering the clutter of electrical network existence and hindering the machine generation feeds back to electrical network;
Rectification and filter unit, being used for the direct rectification in grid alternating current source is direct current.
Inversion unit becomes high-frequency alternating current for the direct current after rectification;
Output rectification and filter unit are used for according to the load needs, and reliable and stable DC power supply is provided;
Described control circuit comprises clock oscillator, pwm circuit and the drive circuit that connects successively, and described drive circuit is connected with described inversion unit;
Described accessory power supply is connected with described control circuit, is used for the power supply to control circuit.
In order to realize better the utility model, further technical scheme is:
According to an embodiment of the present utility model, described clock oscillator can be replaced by permanent pulse width generator.
According to an embodiment of the present utility model, described pwm circuit can be replaced by the PFM circuit.
The utility model can also be:
According to an embodiment of the present utility model, also comprise testing circuit, be used for providing protective circuit just be in operation various parameters and various instrumented data.
Compared with prior art, one of the beneficial effects of the utility model are:
Switching Power Supply of the present utility model has safety, reliable, and power consumption is little, and conversion ratio is high, is convenient to the Problem of faulty equipment.
Description of drawings
For clearer explanation present specification embodiment or technical scheme of the prior art, the below will do simple the introduction to the accompanying drawing of required use in the description of embodiment or prior art, apparently, the accompanying drawing that the following describes is only the reference to some embodiment in present specification, for those skilled in the art, in the situation that do not pay creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 shows the schematic block diagram according to the Switching Power Supply of an embodiment of the utility model.
Fig. 2 shows the principle schematic according to the Switching Power Supply of another embodiment of the utility model.
Wherein, the corresponding name of the Reference numeral in accompanying drawing is called:
The 101-main circuit, the 102-control circuit, the 103-accessory power supply, 104-impulse current amplitude limit unit, 105-input filter unit, 106-rectification and filter unit, the 107-inversion unit, 108-output rectification and filter unit, 109-clock oscillator/permanent pulse width generator, 110-PWM/PFM circuit.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
Fig. 1 shows the schematic block diagram according to the Switching Power Supply of an embodiment of the utility model.A kind of Switching Power Supply as shown in Figure 1 comprises main circuit 101, control circuit 102, accessory power supply 103; Described main circuit 101 comprises:
Impulse current amplitude limit unit 104 is for the impulse current that limits the moment input side that switches on power.
Rectification and filter unit 106, being used for the direct rectification in grid alternating current source is direct current.
Output rectification and filter unit 108 are used for according to the load needs, and reliable and stable DC power supply is provided;
Described control circuit 102 comprises successively the clock oscillator that connects/permanent pulse width generator 109, PWM/PFM circuit 110 and drive circuit, and described drive circuit 111 is connected with described inversion unit 107; From the output sampling, compare with set point on the one hand, then remove control inverter; change its pulsewidth or arteries and veins frequently, make stable output, on the other hand; according to the data that test circuit provides, differentiate through protective circuit, provide control circuit to carry out various safeguard measures to power supply.
Described accessory power supply 103 can be connected (not shown in figure 1) with described control circuit 102, can be the chips such as protective circuit 113 and control circuit 102(PWM) the work power supply.
Also comprise testing circuit 112, can be used for providing just be in operation in protective circuit 113 various parameters and various instrumented data.
Fig. 2 shows the principle schematic according to the Switching Power Supply of another embodiment of the utility model.As shown in Figure 2, Switching Power Supply adopts power semiconductor as switch element exactly, and by the periodicity on-off switch, the duty of control switch element is recently adjusted output voltage.Switch element repeatedly switches on and off at a certain time interval, input power Vi provides energy by switch S and filter circuit to load RL when switch is connected without part, when switch S disconnects, energy storage device in circuit (circuit that L1, C2, diode D form) stored energy when being released in switch connection to load RL makes load obtain continuous and stable energy.
VO=TON/T*Vi；
VO is the average voltage at load two ends;
TON is each time of connecting of switch;
T is the work period of switch on and off;
By formula as can be known, change the ratio of switch connection time and work period, between VO, average voltage also changes thereupon, and therefore, the ratio of automatically adjusting TON and T along with the variation of load and input supply voltage just makes output voltage VO remain unchanged.The duty ratio of change TON turn-on time and work period ratio that is change pulse, this method is called " time ratio control " (TimeRationControl is abbreviated as TRC).
Press the TRC control principle, three kinds of modes arranged:
1. pulse width modulation (PulseWithModulation is abbreviated as PWM);
Switch periods is constant, changes the mode of duty ratio by changing pulse duration.
2. pulse frequency modulated (PulseFrequencyModulation is abbreviated as PFM);
The conducting pulse duration is constant, changes the mode of duty ratio by changing the switch frequency.
3. hybrid modulation;
Conducting pulse duration and switch frequency are all unfixing, the mode that can change each other, and it is the mixing of above two kinds of modes.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part cross-references gets final product.
Although with reference to a plurality of explanatory embodiment of the present utility model, the utility model is described here, but, should be appreciated that, those skilled in the art can design a lot of other modification and execution modes, and these are revised and within execution mode will drop on the disclosed principle scope and spirit of the application.
Claims (4)
1. a Switching Power Supply, is characterized in that, comprises main circuit, control circuit, accessory power supply;
Described main circuit comprises:
Impulse current amplitude limit unit is for the impulse current that limits the moment input side that switches on power;
The input filter unit, the clutter that is used for filtering the clutter of electrical network existence and hindering the machine generation feeds back to electrical network;
Rectification and filter unit, being used for the direct rectification in grid alternating current source is direct current;
Inversion unit becomes high-frequency alternating current for the direct current after rectification;
Output rectification and filter unit are used for according to the load needs, and reliable and stable DC power supply is provided;
Described control circuit comprises clock oscillator, pwm circuit and the drive circuit that connects successively, and described drive circuit is connected with described inversion unit;
Described accessory power supply is connected with described control circuit, is used for the power supply to control circuit.
2. Switching Power Supply according to claim 1, is characterized in that, described clock oscillator can be replaced by permanent pulse width generator.
3. Switching Power Supply according to claim 1, is characterized in that, described pwm circuit can be replaced by the PFM circuit.
4. Switching Power Supply according to claim 1, is characterized in that, also comprises testing circuit, is used for providing protective circuit just be in operation various parameters and various instrumented data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320235961 CN203278657U (en) | 2013-05-03 | 2013-05-03 | Switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320235961 CN203278657U (en) | 2013-05-03 | 2013-05-03 | Switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203278657U true CN203278657U (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320235961 Expired - Fee Related CN203278657U (en) | 2013-05-03 | 2013-05-03 | Switching power supply |
Country Status (1)
| Country | Link |
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| CN (1) | CN203278657U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655827A (en) * | 2016-12-11 | 2017-05-10 | 湖北永恒太阳能股份有限公司 | Independent power supply device for router of information-type intelligent photovoltaic system |
| CN107994784A (en) * | 2017-12-29 | 2018-05-04 | 重庆希诺达通信有限公司 | A kind of ultrathin high-power ACDC Switching Power Supplies |
| CN109842154A (en) * | 2019-02-18 | 2019-06-04 | 阳光电源股份有限公司 | A kind of means of relay controlling and device of gird-connected inverter |
| CN111509855A (en) * | 2020-04-24 | 2020-08-07 | 亿联智能科技(台州)有限公司 | Multifunctional digital Internet switching power supply and control method thereof |
-
2013
- 2013-05-03 CN CN 201320235961 patent/CN203278657U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655827A (en) * | 2016-12-11 | 2017-05-10 | 湖北永恒太阳能股份有限公司 | Independent power supply device for router of information-type intelligent photovoltaic system |
| CN107994784A (en) * | 2017-12-29 | 2018-05-04 | 重庆希诺达通信有限公司 | A kind of ultrathin high-power ACDC Switching Power Supplies |
| CN109842154A (en) * | 2019-02-18 | 2019-06-04 | 阳光电源股份有限公司 | A kind of means of relay controlling and device of gird-connected inverter |
| CN109842154B (en) * | 2019-02-18 | 2021-10-29 | 阳光电源股份有限公司 | Relay control method and device of grid-connected inverter |
| CN111509855A (en) * | 2020-04-24 | 2020-08-07 | 亿联智能科技(台州)有限公司 | Multifunctional digital Internet switching power supply and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20131106 Termination date: 20140503 |