CN201213240Y - Standard power source output circuit - Google Patents
Standard power source output circuit Download PDFInfo
- Publication number
- CN201213240Y CN201213240Y CNU2008200505720U CN200820050572U CN201213240Y CN 201213240 Y CN201213240 Y CN 201213240Y CN U2008200505720 U CNU2008200505720 U CN U2008200505720U CN 200820050572 U CN200820050572 U CN 200820050572U CN 201213240 Y CN201213240 Y CN 201213240Y
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- power supply
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Abstract
The utility model relates to a standard power supply output circuit, aiming at solving the problem that a rectifier set of the standard power supply output circuit in a switch power supply switching device has great loss and high cost. A loop rectifier is connected in series with a shared output branch circuit, and each voltage output branch circuit is additionally connected with a single-way rectifier in series or is not additionally connected with a single-way rectifier. Moreover, an auxiliary control branch circuit is coupled with a main control branch circuit sampled by a feedback circuit to overcome the poor cross regulation during the multiway voltage output of a switch power supply and provide stable multiway voltage output.
Description
Technical field
The utility model relates to the reference power supply output circuit in the Switching Power Supply conversion equipment.
Background technology
The task of Switching Power Supply conversion equipment is that the direct current that the civil power alternating current is converted to standard is supplied with each equipment.As Fig. 1, the Switching Power Supply conversion equipment generally comprises:
The internal electric source supply circuit converts civil power the power supply of direct current as the supply power power conversion circuit to;
The power translation circuit, the power supply that inner power supply circuit is provided carries out Power Conversion, the AC power that power output is controlled;
The reference power supply output circuit carries out rectifying and wave-filtering to the AC power that the power translation circuit provides, each equipment of the standard compliant direct-current power supply of output multichannel;
Feedback circuit, one or more output to the reference power supply output circuit is relatively exported the control circuit that an error voltage feeds back to prime power translation circuit in the back through voltage sample and with reference voltage, the power translation circuit is adjusted power output in view of the above, and is stable with the voltage of the power output circuit that maintains the standard.
When feedback circuit single channel sampling FEEDBACK CONTROL (generally get and require output error scope that group little or that the output voltage load is heavier), the output voltage error of not participating in sampling is bigger, and carrying load ability is poor.
When the feedback circuit multichannel was taken a sample simultaneously, the error range of every road output voltage was just bigger, the output accuracy height of one road output voltage of only not taking a sample.This is the defective that more existing Switching Power Supplies are wanting in plurality of voltages output intersection regulation.
Reference power supply output circuit block diagram such as Fig. 2.Transformer secondary output has a plurality of windings, after the pulse voltage in each winding is exported the rectifier rectification of branch road through this voltage, and output voltage behind filter filtering.Rectifier on each voltage output branch road constitutes the rectifier group.The rectifier of every road output need have the withstand voltage that is not less than this road reverse voltage amplitude, and the reverse withstand voltage of rectifier is high more, and conduction loss is just big more, and product cost is high more.
Schematic diagram such as Fig. 3 of existing Switching Power Supply plurality of voltages output circuit, circuit is the reference power supply output circuit in the frame of broken lines, Switching Power Supply is when operate as normal, in the pulse transformer T1 time level series connection winding bottom the pulse voltage responded to of winding (6-5 pin) export after rectifier D7 rectification again through capacitor C 3 from the 6th pin of T1 level of pulse transformer, inductance L 3, output dc voltage V1 after the filter that capacitor C 2 is formed (also can adopt the filter of other form) filtering, voltage V1 and as the control voltage of Switching Power Supply, the common return end of pulse transformer T1 (the 5th pin) connects output ground, as shared output ground branch road.
The 7th pin of pulse transformer T1 connects the input of rectifier D6, output dc voltage V2 after connecing the filter of forming by capacitor C 17, inductance L 2, capacitor C 27 after the rectifier D6 rectification, resistance R 1, Zener diode ZD1 arrive ground as overshoot voltage-stabilizing device (also can adopt other voltage regulation way) output voltage V 2 in parallel, to prevent output voltage V 2 unloaded overshoots.
If think more plurality of voltages output, then T1 level of pulse transformer upwards can be added series connection winding and output tap, connected mode is identical with the device of V2 output branch road, can realize plurality of voltages output expansion.
The utility model content
The utility model at first provides the reference power supply output circuit that plurality of voltages output is provided, and its rectifier group loss is lower and cost is lower.
The reference power supply output circuit comprises
(1) the transformer secondary output winding that controlled by the power translation circuit,
(2) draw many voltage output branch roads and a shared output ground branch road from secondary winding,
(3) every voltage is exported equal concatenated filter on the branch road,
It is characterized in that
(4) serial connection loop rectifier on the shared output ground branch road,
(5) be connected in series single-way rectifier in addition or do not establish single-way rectifier in addition on each bar voltage output branch road.
The loop rectifier that the utility model is connected in series on shared output ground branch road can all carry out rectification to each output loop.Both single-way rectifier can be connected in series in addition on each bar voltage output branch road, also single-way rectifier can be do not established in addition.Other is established the voltage output branch road of rectifier, the rectifier that is located on this branch road is connected with the loop rectifier on the output voltage loop, because the loop rectifier has born a part of reverse voltage, so the rectifier of this voltage output branch road can be selected the lower rectifier of reverse withstand voltage for use; And to not establishing the voltage output branch road of single-way rectifier in addition, just with the loop rectifier to its rectification.All need dispose the higher rectifier of reverse withstand voltage with each voltage output branch road of prior art and compare, rectifier group conduction loss of the present utility model is lower and cost is also lower.Usually select the minimum voltage of output voltage output branch road not establish single-way rectifier in addition in practice, it is withstand voltage to reach higher repercussion that other output voltage higher voltage output branch road is then established single-way rectifier in addition.
On this basis, the utility model provides improved reference power supply output circuit, and it cooperates with existing feedback circuit, and the defective that the regulation of intersecting when overcoming the output of Switching Power Supply plurality of voltages is wanting in provides stable plurality of voltages output.
Described reference power supply output circuit,
(1) wherein a voltage output branch road is as the master control branch road, and its voltage output is fed the circuit sampling,
(2) other voltage is exported branch road conduct from the control branch road,
(3) couple from control branch road and master control branch road, this wave component from control branch road output voltage is reached the master control branch road, thereby be fed the circuit sampling; This couples the secondary winding exit ac short circuit of any two voltages not being exported branch road.
Owing to be coupled to the master control branch road from the control branch road, to reach the master control branch road from the wave component of control branch road output voltage, output voltage signal on the master control branch road has just comprised from the wave component of control branch road so, after it is fed the circuit sampling, the power translation circuit is adjusted power output according to the master control branch road with from the wave component of control branch road, just realized accurate control to master control branch road output voltage, also taken into account simultaneously from the sampling FEEDBACK CONTROL of control branch road output voltage, thereby the defective that the regulation of intersecting when overcoming the output of Switching Power Supply plurality of voltages is wanting in provides stable plurality of voltages output.Should note to make the secondary winding exit ac short circuit of any two voltages output branch road when coupling.
Description of drawings
Fig. 1 is the structured flowchart of Switching Power Supply conversion equipment.
Fig. 2 is the structured flowchart of existing reference power supply output circuit.
Fig. 3 is existing Switching Power Supply plurality of voltages output circuit figure.
Fig. 4 is the structured flowchart of the utility model reference power supply output circuit.
Fig. 5 is the utility model Switching Power Supply plurality of voltages output circuit figure.
Embodiment
Utility model power output circuit as Fig. 4, its circuit diagram is represented with big frame of broken lines in Fig. 5 inner the branch, comprise the transformer T1 secondary winding that is subjected to the control of power translation circuit, draw two voltage output branch roads and a shared output ground branch road from secondary winding.Equal concatenated filter on every voltage output branch road.Output ground branch road is provided with between the common return end and voltage output ground that loop rectifier D7 is serially connected in secondary winding.Being provided with rectifier D6 from the control branch road is serially connected between transformer secondary output winding and filter L2, C17, the C27, to reach the rectification requirement in this loop.
The master control branch voltage is after loop rectifier D7 rectification and master control voltage filter device L3, C3, C2 filtering, and output dc voltage V1 is fed the circuit sampling; From the pulse voltage of the transformer secondary output winding induction of control the branch road through this branch road rectifier D6 rectification, through after filter L2, the C17 of controlling branch road, C27 filtering, output dc voltage V2 is than output voltage V 1 height of master control branch road (output voltage also can be lower than master control voltage, connection with to be higher than the master control output voltage similar).The capacitor C 16 of adjusting coupler from the contact cross-over connection of control branch road rectifier D6 and filter L2, C17, C27 as voltage is to the contact of master control branch road secondary winding and filter L3, C3, C2.
The error voltage that master control branch road of the present utility model is directly taken a sample, relatively produced its output voltage through the Switching Power Supply sampling feedback circuit feeds back to power inverter and adjusts power output, thereby makes output voltage stabilization.
One end of voltage adjustment coupled apparatus can be connected on any contact before and after the V2 output voltage filter, the other end of coupled apparatus can be received on any contact of master control voltage V1 output circuit, but must notice that coupled apparatus can not directly be connected between the pin 6,7 of transformer T1, otherwise will cause ac short circuit.
Voltage is adjusted coupler also can be a plurality of and connect, and also can adopt the same coupler of other form and its function class.
Voltage is adjusted coupler also can a plurality of receiving respectively behind control branch road rectifier and between the master control branch road.
More if desired from the output of control branch voltage, then can upwards continue the serial connection winding or from winding, draw tap from the transformer secondary output winding, connected mode is identical from control branch road output device with output voltage V 2, can realize plurality of voltages output expansion, and anti-load regulation is functional.
Claims (3)
1. the reference power supply output circuit comprises
Be subjected to the transformer secondary output winding of power translation circuit control,
Draw many voltage output branch roads and a shared output ground branch road from secondary winding,
Equal concatenated filter on every voltage output branch road,
It is characterized in that
Serial connection loop rectifier on the shared output ground branch road,
Be connected in series single-way rectifier in addition or do not establish single-way rectifier in addition on each bar voltage output branch road.
2. reference power supply output circuit according to claim 1,
Wherein a voltage output branch road is as the master control branch road, and its voltage output is fed the circuit sampling,
Other voltage is exported branch road conduct from the control branch road,
Couple from control branch road and master control branch road, this wave component from control branch road output voltage is reached the master control branch road, thereby be fed the circuit sampling; This couples the secondary winding exit ac short circuit of any two voltages not being exported branch road.
3. reference power supply output circuit according to claim 2, master control branch road are not established single-way rectifier in addition, are higher than the master control branch road from the output voltage of controlling branch road, are connected in series single-way rectifier in addition from the control branch road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200505720U CN201213240Y (en) | 2008-07-11 | 2008-07-11 | Standard power source output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200505720U CN201213240Y (en) | 2008-07-11 | 2008-07-11 | Standard power source output circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201213240Y true CN201213240Y (en) | 2009-03-25 |
Family
ID=40497418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200505720U Expired - Fee Related CN201213240Y (en) | 2008-07-11 | 2008-07-11 | Standard power source output circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201213240Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102238782A (en) * | 2010-04-21 | 2011-11-09 | 奥斯兰姆有限公司 | Power supply circuit for light sources, such as lighting LED systems |
| CN109546862A (en) * | 2017-09-22 | 2019-03-29 | 冷王公司 | DC to the DC converter of variable DC link voltage is provided |
-
2008
- 2008-07-11 CN CNU2008200505720U patent/CN201213240Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102238782A (en) * | 2010-04-21 | 2011-11-09 | 奥斯兰姆有限公司 | Power supply circuit for light sources, such as lighting LED systems |
| CN109546862A (en) * | 2017-09-22 | 2019-03-29 | 冷王公司 | DC to the DC converter of variable DC link voltage is provided |
| CN109546862B (en) * | 2017-09-22 | 2024-04-19 | 冷王有限责任公司 | DC-to-DC converter providing variable DC link voltage |
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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: 20090325 Termination date: 20110711 |