CN206292592U - A kind of SCM Based Switching Power Supply - Google Patents
A kind of SCM Based Switching Power Supply Download PDFInfo
- Publication number
- CN206292592U CN206292592U CN201621428681.2U CN201621428681U CN206292592U CN 206292592 U CN206292592 U CN 206292592U CN 201621428681 U CN201621428681 U CN 201621428681U CN 206292592 U CN206292592 U CN 206292592U
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- unit
- control unit
- power supply
- sampling
- machine operation
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Abstract
The utility model discloses a kind of SCM Based Switching Power Supply, including：Auxiliary power unit, sampling unit, control unit and power conversion unit；Auxiliary power unit is powered to control unit, and sampling unit is connected with control unit, and control unit is connected with power conversion unit；Sampling unit includes voltage sampling unit and current sampling unit.Also include human-machine operation unit, it is connected with control unit.Human-machine operation unit includes liquid crystal display and keyboard unit.Human-machine operation unit uses CAN interface.Control chip in control unit is TMS320F28035.Using voltage x current as the double closed-loop control system for feeding back, by the use of the CLA in TMS320F28035 as independent process, arithmetic speed is improve, while the hardware handles for realizing floating data ensure that operational precision, there is good stability for the control of high accuracy output；The complexity of reduction system, reduces thermal losses, increased the reliability of system.
Description
Technical field
The utility model is related to Switching Power Supply design field, more particularly to a kind of SCM Based Switching Power Supply.
Background technology
With the development and the progress of society of science and technology, people require that digital electronic goods are increasingly minimized and densification, its
The surface treatment of internal connector needs more accurate DC suppling equipment, has required the product for being accurate to 100 μ A ranks
Product.
Obviously, current regular tap power supply do not reached it is such require that, the limit of accuracy base of analog device first
Also 0.5% level is just reached in sheet, it is contemplated that the influence of a large amount of resistance capacitances in periphery and potentiometer, wants to ensure 0.1% essence
Degree requires, is almost difficult to accomplish.And existing Switching Power Supply conversion ratio is low, output accuracy is not high, and ripple is excessive, and output is unstable
It is fixed, easy wear and aging.
Utility model content
In view of the foregoing, the utility model provides a kind of SCM Based Switching Power Supply.
To reach above-mentioned purpose, the utility model solves the technical scheme that its technical problem used is：
A kind of SCM Based Switching Power Supply, including：Auxiliary power unit, sampling unit, control unit and power turn
Change unit；The auxiliary power unit is powered to described control unit, and the sampling unit is connected with described control unit, described
Control unit is connected with the power conversion unit；The sampling unit includes voltage sampling unit and current sampling unit.
Its further feature is as follows：
Also include human-machine operation unit, it is connected with described control unit.
The human-machine operation unit includes liquid crystal display and keyboard unit.
The human-machine operation unit uses CAN interface.
Control chip in described control unit is TMS320F28035.
Due to the utilization of above-mentioned technical proposal, the utility model has following beneficial effect compared with prior art：
Using voltage x current as feedback double closed-loop control system, by the use of the CLA in TMS320F28035 as independence
Process, improves arithmetic speed, while the hardware handles for realizing floating data ensure that operational precision, is exported for high accuracy
Control there is good stability；The complexity of reduction system, reduces thermal losses, increased the reliability of system.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of SCM Based Switching Power Supply of the utility model.
Fig. 2 is a kind of control system figure of SCM Based Switching Power Supply of the utility model.
Specific embodiment
With reference to specific embodiment, content of the present utility model is described in further detail：
Refering to Fig. 1 and Fig. 2, a kind of SCM Based Switching Power Supply, including：Auxiliary power unit 1, sampling unit, control
Unit processed 3 and power conversion unit 4；The auxiliary power unit 1 is powered to described control unit 3, the sampling unit and institute
State control unit 3 to connect, described control unit 3 is connected with the power conversion unit 4；The sampling unit includes voltage sample
Unit 21 and current sampling unit 22.Also include human-machine operation unit 5, it is connected with described control unit 3.The human-machine operation
Unit 5 includes liquid crystal display and keyboard unit.The human-machine operation unit 5 uses CAN interface.The control
Control chip in unit 3 is TMS320F28035.
Operation principle：
Using voltage x current as the double closed-loop control system for feeding back, using the built-in CLA of TMS320F28035 processors
The computing of control algolithm is completed, wherein CLA hardware can provide high-precision floating-point operation, it is ensured that operational precision.Due to system
The two-way of voltage and current is needed to sample, so needing two sets of independent front end analogue sampling sections.In order to ensure the speed of output
Degree has used parallel interface, and the EBI of extensible processor is needed based on this.Human-machine operation unit has CAN interface,
Control unit can be connected using 4 lines.
Above-described embodiment only to illustrate technology design of the present utility model and feature, technique is familiar with its object is to allow
Personage will appreciate that content of the present utility model and be carried out, protection domain of the present utility model can not be limited with this,
All equivalent change or modifications made according to the utility model Spirit Essence, should all cover in protection domain of the present utility model
It is interior.
Claims (5)
1. a kind of SCM Based Switching Power Supply, it is characterised in that including：Auxiliary power unit, sampling unit, control unit
And power conversion unit；
The auxiliary power unit is powered to described control unit, and the sampling unit is connected with described control unit, the control
Unit processed is connected with the power conversion unit；
The sampling unit includes voltage sampling unit and current sampling unit.
2. a kind of SCM Based Switching Power Supply according to claim 1, it is characterised in that：Also include human-machine operation list
Unit, it is connected with described control unit.
3. a kind of SCM Based Switching Power Supply according to claim 2, it is characterised in that：The human-machine operation unit
Including liquid crystal display and keyboard unit.
4. a kind of SCM Based Switching Power Supply according to Claims 2 or 3, it is characterised in that：The human-machine operation
Unit uses CAN interface.
5. a kind of SCM Based Switching Power Supply according to claim 1, it is characterised in that：In described control unit
Control chip is TMS320F28035.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621428681.2U CN206292592U (en) | 2016-12-24 | 2016-12-24 | A kind of SCM Based Switching Power Supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621428681.2U CN206292592U (en) | 2016-12-24 | 2016-12-24 | A kind of SCM Based Switching Power Supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206292592U true CN206292592U (en) | 2017-06-30 |
Family
ID=59154516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621428681.2U Expired - Fee Related CN206292592U (en) | 2016-12-24 | 2016-12-24 | A kind of SCM Based Switching Power Supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206292592U (en) |
-
2016
- 2016-12-24 CN CN201621428681.2U patent/CN206292592U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170630 Termination date: 20201224 |