CN203225653U - Circuit for reducing ripple waves and suppressing noise for adjustable precision direct current high-voltage source - Google Patents
Circuit for reducing ripple waves and suppressing noise for adjustable precision direct current high-voltage source Download PDFInfo
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- CN203225653U CN203225653U CN 201320286633 CN201320286633U CN203225653U CN 203225653 U CN203225653 U CN 203225653U CN 201320286633 CN201320286633 CN 201320286633 CN 201320286633 U CN201320286633 U CN 201320286633U CN 203225653 U CN203225653 U CN 203225653U
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- coupling network
- voltage source
- broadband transformer
- noise
- circuit
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Abstract
Disclosed is a circuit for reducing ripple waves and suppressing noise for an adjustable precision direct current high-voltage source. The circuit is composed of a first class coupling network A, a broadband transformer B, a front power amplifier C, a broadband transformer D and a second class coupling network E. The first class coupling network A is connected with the broadband transformer B and the second class coupling network E. The broadband transformer B is connected with the front power amplifier C. The front power amplifier C is connected with the broadband transformer D. The broadband transformer D is connected with the second class coupling network E. According to the circuit for reducing the ripple waves and suppressing the noise for the adjustable precision direct current high-voltage source, an active power filter circuit with negative feedback is arranged, the ripple waves in direct current voltages and the noise in different frequency bands can be separated reliably, and various ripple waves and high-frequency noise can be offset and suppressed initiatively.
Description
Technical field
The utility model relates to for the reduction ripple in adjustable precision dc high voltage source and suppresses the noise circuit, is used for the electric energy metrical field.
Background technology
In the direct current accurate measurement, we need the direct voltage source of highly stable (as the changing value in 3 minutes less than 0.003%), and its output voltage should be able to be adjustable in the scope of the 1%-120% of range value, and its ripple and noise are also very little simultaneously, usually require under unloaded and full-load conditions k
NRRLess than 0.1%.
At present, in order to reduce ripple and to suppress noise and mainly adopt two kinds of methods: passive filtering network technique, active power filtering network technique.The passive filtering network technique is to design single-stage or the multiple filter of being made up of inductance, electric capacity, resistance etc. at the front end power amplifier of direct voltage source and output stage, and the active power filtering network technique is that the single-stage of being made up of inductance, electric capacity, resistance and power amplifier etc. or a multiple filter are designed on the front end power amplifier of direct voltage source.
Prior art adopts the passive filtering network technique to strengthen the stability that filter network can reduce power supply to the level about ripple and noise suppressed to 0.5% again, and its output can increase settling time; Though adopt active power filtering network technique ripple and noise suppressed ratio to improve, very easily cause the output vibration.At present most of tested table is inner uses the Switching Power Supply power supply, and its switching noise can seal in precision DC stabilizer by wiring, because bandwidth, signal are strong, the use filter method is difficult to be suppressed to 0.2% level.Disturb no obvious inhibition for the power frequency that seals in by power supply.
Summary of the invention
The utility model provides the reduction ripple that is used for adjustable precision dc high voltage source and has suppressed the noise circuit, degenerative active power filtering technology is with in employing, ripple in the direct voltage and the noise of different frequency range can be isolated reliably, various ripples and high-frequency noise can be initiatively offset and suppress.Generally, the content of ripple and noise is reduced to below 0.1%.
The utility model is achieved through the following technical solutions above-mentioned purpose: be used for the reduction ripple in adjustable precision dc high voltage source and suppress the noise circuit, by one-level coupling network A, broadband transformer B, preposition, power amplifier C, broadband transformer D and secondary coupling network E form, one-level coupling network A is connected with broadband transformer B, secondary coupling network E, broadband transformer B is connected with preposition, power amplifier C, preposition, power amplifier C is connected with broadband transformer D, and broadband transformer D is connected with secondary coupling network E.
Described one-level coupling network A is made up of resistance R 1, inductance L 1, capacitor C 1, and wherein resistance R 1 is connected with inductance L 1, and inductance L 1 is not connected with the capacitor C 2 of capacitor C 1 with secondary coupling network E, and capacitor C 1 is connected with broadband transformer B.
Described secondary coupling network E is made up of inductance L 2, capacitor C 2, and inductance L 2 links to each other with capacitor C 2, and capacitor C 2 is connected to the inductance L 1 of one-level coupling network A.
Described broadband transformer B, D adopt and keep the smooth broadband transformer of response in the 10Hz-50kHz bandwidth.When coiling broadband transformer B, D, adopt electromagnetic shielding, import into to prevent external disturbance.
Described reduction ripple and the control method that suppresses the noise circuit for adjustable precision dc high voltage source comprise the steps:
(1) precision DC high voltage source signal is realized ripple and noise separation by one-level coupling network A,
(2) broadband transformer B will exchange low-frequency ripple and high-frequency noise extracts from DC quantity, and export preposition, power amplifier C to,
(3) preposition, the noise of power amplifier C and ripple signal carry out phase adjusted and gain-adjusted, it is equated with noise amplitude with ripple in the former precision DC high voltage source, phase place is opposite, and then driving broadband transformer D, be coupled to the precision DC high voltage source through inductance L 2, capacitor C 2 and inductance L 1, resistance R 1, offset and suppressed ripple and noise.
Described precision DC high voltage source is the 30V-1500V scope, generally adopts PWM or intermediate frequency sine wave signal to boost through power amplification and produces by rectifying and wave-filtering, and its output has bigger ripple and noise, k under the bringing onto load condition
NRRValue is usually more than 1%, and the direct current accurate measurement requires k
NRRBe lower than 0.1%.
Principle of the present utility model is:
Output voltage signal (the U of direct voltage source
0) be expressed as
U
0=U_+U～
U
0Output voltage signal for direct voltage source.
U_ is the direct current component in the output voltage signal of direct voltage source.
U
～For the AC portion in the output voltage signal of direct voltage source, levy with effective voltmeter.
U
R～For the low-frequency ripple in the output voltage signal of direct voltage source, levy with effective voltmeter.
U
N～For the high-frequency noise in the output voltage signal of direct voltage source, levy with effective voltmeter.Ripple and noise suppressed ratio
Outstanding advantage of the present utility model is:
(1) circuit that adopts can reduce ripple and the noise of direct voltage source in the 10Hz-50kHz frequency range, and its rejection ratio is up to 40db, under full-load conditions, and k
NRRRepresentative value less than 0.03%.
(2) adopt and to be with degenerative active power filtering technology, can isolate ripple in the direct voltage and the noise of different frequency range reliably, can initiatively offset and suppress various ripples and high-frequency noise; Rejection ratio than prior art is high.Satisfy the specification requirement of direct current energy meter calibrating installation well, further improved the output stability of big voltage simultaneously.
(3) for the power frequency interference and the external disturbance that seal in by power supply the obvious suppression effect is arranged also, strengthened product to all-environment adaptability.
(4) stability and the response speed of precision DC stabilizer there is not influence substantially.Circuit never vibrates, and reliability is good.
Description of drawings
Fig. 1 is the reduction ripple for adjustable precision dc high voltage source described in the utility model and suppresses the noise schematic block circuit diagram.
Fig. 2 is the reduction ripple for adjustable precision dc high voltage source described in the utility model and the one-level coupling network A schematic diagram that suppresses the noise circuit.
Fig. 3 is the reduction ripple for adjustable precision dc high voltage source described in the utility model and preposition, the power amplifier C theory diagram that suppresses the noise circuit.
Fig. 4 is the reduction ripple for adjustable precision dc high voltage source described in the utility model and the secondary coupling network E schematic diagram that suppresses the noise circuit.
Embodiment
Below by drawings and Examples the technical solution of the utility model is further specified.
As shown in Figure 1, ripple and the noise circuit in reduction described in the utility model is adjustable dc high voltage source, by one-level coupling network A, broadband transformer B, preposition, power amplifier C, broadband transformer D and secondary coupling network E form, one-level coupling network A is connected with broadband transformer B, secondary coupling network E, broadband transformer B is connected with preposition, power amplifier C, and preposition, power amplifier C is connected with broadband transformer D, and broadband transformer D is connected with secondary coupling network E.
One-level coupling network A is made up of resistance R 1, inductance L 1, capacitor C 1, and wherein resistance R 1 is connected with inductance L 1, and inductance L 1 is not connected with the capacitor C 2 of capacitor C 1 with secondary coupling network E, and capacitor C 1 is connected with broadband transformer B.
Secondary coupling network E is made up of inductance L 2, capacitor C 2, and inductance L 2 links to each other with capacitor C 2, and capacitor C 2 is connected to the inductance L 1 of one-level coupling network A.
Broadband transformer B, D adopt and keep the smooth broadband transformer of response in the 10Hz-50kHz bandwidth.When coiling broadband transformer B, D, adopt electromagnetic shielding, import into to prevent external disturbance.
Be used for the control method of reduction ripple and the inhibition noise circuit in adjustable precision dc high voltage source, may further comprise the steps:
(1) precision DC high voltage source signal is realized ripple and noise separation by one-level coupling network A,
(2) broadband transformer B will exchange low-frequency ripple and high-frequency noise extracts from DC quantity, and export preposition, power amplifier C to,
(3) preposition, the noise of power amplifier C and ripple signal carry out phase adjusted and gain-adjusted, it is equated with noise amplitude with ripple in the former precision DC high voltage source, phase place is opposite, and then driving broadband transformer D, be coupled to the precision DC high voltage source through inductance L 2, capacitor C 2 and inductance L 1, resistance R 1, offset and suppressed ripple and noise.
As shown in Figure 2, described in the utility model for the reduction ripple in adjustable precision dc high voltage source and the one-level coupling network A schematic diagram of inhibition noise circuit.One-level coupling network A is made up of resistance R 1, inductance L 1, capacitor C 1, and wherein resistance R 1 is connected with dc high-voltage source, inductance L 1 respectively, and inductance L 1 is connected with capacitor C 1, secondary coupling network E respectively, and capacitor C 1 is connected with broadband transformer B.
As shown in Figure 3, described in the utility model for the reduction ripple in adjustable precision dc high voltage source and preposition, the power amplifier C theory diagram of inhibition noise circuit.Broadband transformer B is connected with preamplifier and noise ripple signal is carried out phase place and gain is adjusted, and preamplifier is connected with power amplifier, power amplifier by resistance and electric capacity respectively with broadband transformer D, be connected.
Fig. 4 is the reduction ripple for adjustable precision dc high voltage source described in the utility model and the secondary coupling network E schematic diagram that suppresses the noise circuit.Secondary coupling network E is made up of inductance L 2, capacitor C 2.Broadband transformer D links to each other with inductance L 2, and inductance L 2 links to each other with capacitor C 2, and capacitor C 2 is connected to one-level coupling network A.
Claims (4)
1. be used for the reduction ripple in adjustable precision dc high voltage source and suppress the noise circuit, it is characterized in that, this circuit is by one-level coupling network A, broadband transformer B, preposition, power amplifier C, broadband transformer D and secondary coupling network E form, one-level coupling network A is connected with broadband transformer B, secondary coupling network E, broadband transformer B is connected with preposition, power amplifier C, and preposition, power amplifier C is connected with broadband transformer D, and broadband transformer D is connected with secondary coupling network E.
According to claim 1 for adjustable precision dc high voltage source the reduction ripple and suppress the noise circuit, it is characterized in that, described one-level coupling network A is made up of resistance R 1, inductance L 1, capacitor C 1, wherein resistance R 1 is connected with inductance L 1, inductance L 1 is connected with the capacitor C 2 of capacitor C 1 with secondary coupling network E respectively, and capacitor C 1 is connected with broadband transformer B.
According to claim 1 for adjustable precision dc high voltage source the reduction ripple and suppress the noise circuit, it is characterized in that, described secondary coupling network E is made up of inductance L 2, capacitor C 2, and inductance L 2 links to each other with capacitor C 2, and capacitor C 2 is connected to the inductance L 1 of one-level coupling network A.
4. reduction ripple and inhibition noise circuit for adjustable precision dc high voltage source according to claim 1 is characterized in that described broadband transformer B, D adopt and keep the smooth broadband transformer of response in the 10Hz-50kHz bandwidth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320286633 CN203225653U (en) | 2013-05-21 | 2013-05-21 | Circuit for reducing ripple waves and suppressing noise for adjustable precision direct current high-voltage source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320286633 CN203225653U (en) | 2013-05-21 | 2013-05-21 | Circuit for reducing ripple waves and suppressing noise for adjustable precision direct current high-voltage source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203225653U true CN203225653U (en) | 2013-10-02 |
Family
ID=49252643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320286633 Withdrawn - After Issue CN203225653U (en) | 2013-05-21 | 2013-05-21 | Circuit for reducing ripple waves and suppressing noise for adjustable precision direct current high-voltage source |
Country Status (1)
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|---|---|
| CN (1) | CN203225653U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280957A (en) * | 2013-05-21 | 2013-09-04 | 广西电网公司电力科学研究院 | Circuit for reducing ripple wave and inhibiting noise and for adjustable precise direct-current high-voltage source and control method |
| CN103973086A (en) * | 2014-05-06 | 2014-08-06 | 中国电子科技集团公司第四十一研究所 | Ripple wave suppressor circuit of program-controlled direct-current power supply |
-
2013
- 2013-05-21 CN CN 201320286633 patent/CN203225653U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280957A (en) * | 2013-05-21 | 2013-09-04 | 广西电网公司电力科学研究院 | Circuit for reducing ripple wave and inhibiting noise and for adjustable precise direct-current high-voltage source and control method |
| CN103280957B (en) * | 2013-05-21 | 2016-04-20 | 广西电网公司电力科学研究院 | For the reduction ripple in adjustable precision DC high voltage source and restraint speckle circuit and control method |
| CN103973086A (en) * | 2014-05-06 | 2014-08-06 | 中国电子科技集团公司第四十一研究所 | Ripple wave suppressor circuit of program-controlled direct-current power supply |
| CN103973086B (en) * | 2014-05-06 | 2016-08-24 | 中国电子科技集团公司第四十一研究所 | A kind of Ripple Suppression device circuit of programme-controlled dc power |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131002 Effective date of abandoning: 20160420 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |