CN2670984Y - Intelligent pulsewidth modulating purified power supply - Google Patents
Intelligent pulsewidth modulating purified power supply Download PDFInfo
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- CN2670984Y CN2670984Y CN 200320128807 CN200320128807U CN2670984Y CN 2670984 Y CN2670984 Y CN 2670984Y CN 200320128807 CN200320128807 CN 200320128807 CN 200320128807 U CN200320128807 U CN 200320128807U CN 2670984 Y CN2670984 Y CN 2670984Y
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Abstract
The utility model relates to an intelligent pulse width modulating purified power supply, wherein, the output and input terminals are simultaneously connected with the input terminal of an A/D sampling circuit whose output terminal is connected with the input terminal of a variable reactance TB through a single-chip microcomputer and a PWM drive circuit. The output terminal of the variable reactance TB is connected with an autoformer TA composed of three electric inductances L1, L2, L3, while the both ends of the variable reactance TB and the autoformer TA are respectively connected in parallel with two capacitances C1, C3 which compose a ' pi ' typed filter together with the electric inductance L2 in the autoformer TA. Since the utility model is continuously stepless to voltage regulation; firstly, the utility model is not easily abraded, which thoroughly solves the defect that the compensational type regulated power supply can not overcome; secondly, the utility model is of fast response speed; thirdly, the utility model is added with filter purification function to obtain a stabler output voltage; fourthly, the utility model is of maintenance free power source without any constant maintenance.
Description
Technical field:
The utility model relates to power technique fields, especially relates to a kind of stabilized voltage supply of stable civil power output voltage.
Background technology:
As everyone knows, civil power exists following problem: surge, high-pressure sharp pulse, transient overvoltage, voltage sag, electric wire noise, frequency drift, the low-voltage that continues, interruption suddenly etc., these problems have great destruction to load.
For stablizing the output voltage of civil power, people generally connect voltage stabilizer at the output terminal of civil power.In all kinds of voltage stabilizers, compensated voltage regulator is a kind of common product, and as SBW electric power voltage stabilizer, full-automatic numerical control voltage stabilizer etc., its capacity does not wait from 3KVA～2000KVA.Accompanying drawing 1 is the single-phase schematic diagram of this class voltage stabilizer, as seen from the figure, the output terminal of this voltage stabilizer links to each other with a PCB (control circuit), and the output terminal of PCB is connected with the contactor KM1 and the KM2 of control motor forward and backward, and the forward and backward of motor M drives carbon brush A1, A2 and is connected with transformer T2; Ui changes when line voltage, control circuit monitors output voltage U o when not satisfying requiring of the precision of voltage regulation, according to its direction that should compensate control KM1 or KM2 adhesive, motor M is just changeed, inversion driving carbon brush A1, A2 slide on transformer T2 obtains voltage Δ U ', Δ U ' compensates to through transformer T1 and forms Δ U voltage on the major loop, makes output voltage U o stable.
The major defect that above-mentioned voltage stabilizer exists is: (1), when the line voltage frequent fluctuation, KM1 or KM2 also continually adhesive disconnect, contacts of contactor burns easily, its life-span is very low, problem is more when precision is high; (2), the upper and lower continually slip of pressure regulation slidding carbon brush A1, A2, very easily wearing and tearing produce carbon distribution, cause transformer T2 turn-to-turn short circuit, sparking, need often to safeguard; Realize by physical construction that because of it so response speed is very slow, the time is generally between 500ms～1500ms when (3), voltage is adjusted; (4), do not possess the purification filter function.
Summary of the invention:
The purpose of this utility model is to provide a kind of complete intelligent width modulation power conditioner that can overcome above-mentioned shortcoming.
The technical solution of the utility model is: the input end at this power conditioner links to each other with the input end of A/D sample circuit with output terminal simultaneously, the output terminal of A/D sample circuit then is connected with the input end of variable reactance TB through single-chip microcomputer, PWM driving circuit, the output terminal of variable reactance TB then links to each other with the autotransformer TA that is made up of inductance L 1, L2 and L3, two ends at variable reactance TB and autotransformer TA also are parallel with capacitor C 1 and C3 respectively, wherein, the inductance L among capacitor C 1, C3 and the autotransformer TA 2 constitutes " π " mode filter.
As improvement of the technical scheme, described variable reactance TB two ends also are parallel with capacitor C 4, also be connected with capacitor C 2 between the inductance L 3 among the output terminal of variable reactance TB and the autotransformer TA, the L3 among the inductance L 1 among capacitor C 4 and the autotransformer TA, capacitor C 2 and the autotransformer TA constitutes wave filter.
Further improve as technique scheme, the output terminal of described single-chip microcomputer also is connected with a Display and Alarm Circuit.
The beneficial effects of the utility model are: this power conditioner does not have the contact, and voltage-regulation is electrodeless continuous, and the mechanical transmission mechanism and the easy wear problems that do not exist compensated voltage regulator to have have thoroughly solved the shortcoming that compensation stabilized voltage supply can't overcome; Secondly, response speed of the present utility model is fast, and the time is at 20ms～50ms, far below the 500ms～1500ms response time of compensated voltage regulator; The 3rd, the utility model has increased the purification filter function, can obtain more stable output voltage; The 4th, the utility model belongs to non-maintaining power supply, need not frequent maintenance.
Description of drawings:
Below in conjunction with accompanying drawing the utility model is described further:
Accompanying drawing 1 is the single-phase schematic diagram of existing compensation stabilized voltage supply
Accompanying drawing 2 is a schematic diagram of the present utility model
Embodiment:
The following stated only is preferred embodiment of the present utility model, does not therefore limit protection domain of the present utility model.
See shown in the accompanying drawing 2: input end of the present utility model links to each other with the input end of A/D sample circuit with output terminal simultaneously, the output terminal of A/D sample circuit is then through single-chip microcomputer, PWM (width modulation) driving circuit is connected with the input end of variable reactance TB, the output terminal of variable reactance TB then with by inductance L 1, L2 links to each other with the autotransformer TA that L3 forms, two ends at variable reactance TB and autotransformer TA also are parallel with capacitor C 1 and C3 respectively, wherein, capacitor C 1, inductance L 2 among C3 and the autotransformer TA constitutes " π " mode filter, this filter time constant is very big, is low-pass filter.When the utility model with after electrical network links to each other, this circuit is equivalent to L shaped RC wave filter and the series connection of LC wave filter, thereby has improved waveform characteristic effectively.
Variable reactance TB two ends also are parallel with capacitor C 4, also be connected with capacitor C 2 between the inductance L 3 among the output terminal of variable reactance TB and the autotransformer TA, L3 among inductance L 1 among capacitor C 4 and the autotransformer TA, capacitor C 2 and the autotransformer TA constitutes wave filter, be used for three, the filtering of quintuple harmonics, to reach better voltage clean-up effect
The output terminal of single-chip microcomputer also is connected with a Display and Alarm Circuit; this Display and Alarm Circuit links to each other with a guidance panel that is provided with LCD (LCD) again; be used for three-phase input voltage, three-phase output voltage and three-phase input current are carried out state indication, thus make the utlity model has, under-voltage protection and mistake, open-phase protection function.
Principle of work of the present utility model is as follows: Ui changes when input voltage.And cause when output voltage U o exceeds the precision of voltage regulation value of setting, input voltage, output voltage and current signal are delivered to the A/D sample circuit simultaneously, the A/D sample circuit carries out filtering, amplification, A/D conversion and produces synchronizing signal signal, and the result delivered to single-chip microprocessor MCU, single-chip microcomputer calculates by analysis, send instruction and change pulse width, promptly change the impedance of reactance TB, thereby capacitor C 4 and reactance TB resonant condition are changed, the B point voltage also changes thereupon, and output voltage U o is met the demands.
Claims (3)
1. complete intelligent width modulation power conditioner, it is characterized in that: the input end of this power conditioner links to each other with the input end of A/D sample circuit with output terminal simultaneously, the output terminal of A/D sample circuit then is connected with the input end of variable reactance TB through single-chip microcomputer, PWM driving circuit, the output terminal of variable reactance TB then links to each other with the autotransformer TA that is made up of inductance L 1, L2 and L3, two ends at variable reactance TB and autotransformer TA also are parallel with capacitor C 1 and C3 respectively, wherein, the inductance L among capacitor C 1, C3 and the autotransformer TA 2 constitutes " π " mode filter.
2. complete intelligent width modulation power conditioner according to claim 1, it is characterized in that: described variable reactance TB two ends also are parallel with capacitor C 4, also be connected with capacitor C 2 between the inductance L 3 among the output terminal of variable reactance TB and the autotransformer TA, the L3 among the inductance L 1 among capacitor C 4 and the autotransformer TA, capacitor C 2 and the autotransformer TA constitutes wave filter.
3. complete intelligent width modulation power conditioner according to claim 1 and 2, it is characterized in that: the output terminal of described single-chip microcomputer also is connected with a Display and Alarm Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320128807 CN2670984Y (en) | 2003-12-31 | 2003-12-31 | Intelligent pulsewidth modulating purified power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320128807 CN2670984Y (en) | 2003-12-31 | 2003-12-31 | Intelligent pulsewidth modulating purified power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2670984Y true CN2670984Y (en) | 2005-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320128807 Expired - Fee Related CN2670984Y (en) | 2003-12-31 | 2003-12-31 | Intelligent pulsewidth modulating purified power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2670984Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012106862A1 (en) * | 2011-07-01 | 2012-08-16 | 华为技术有限公司 | Converter for power factor correction and conversion apparatus for power factor correction |
| CN104049657A (en) * | 2014-07-04 | 2014-09-17 | 山东大学 | Amplitude stabilizing circuit of alternating-current saturable reactor |
-
2003
- 2003-12-31 CN CN 200320128807 patent/CN2670984Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012106862A1 (en) * | 2011-07-01 | 2012-08-16 | 华为技术有限公司 | Converter for power factor correction and conversion apparatus for power factor correction |
| US8531854B2 (en) | 2011-07-01 | 2013-09-10 | Huawei Technologies Co., Ltd. | Power factor correction converter and power factor correction conversion device |
| CN104049657A (en) * | 2014-07-04 | 2014-09-17 | 山东大学 | Amplitude stabilizing circuit of alternating-current saturable reactor |
| CN104049657B (en) * | 2014-07-04 | 2015-08-19 | 山东大学 | A kind of interchange saturable reactor fixed amplitude circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |