CN106357225B - A kind of power switch amplifier common mode noise suppressing method - Google Patents
A kind of power switch amplifier common mode noise suppressing method Download PDFInfo
- Publication number
- CN106357225B CN106357225B CN201611049936.9A CN201611049936A CN106357225B CN 106357225 B CN106357225 B CN 106357225B CN 201611049936 A CN201611049936 A CN 201611049936A CN 106357225 B CN106357225 B CN 106357225B
- Authority
- CN
- China
- Prior art keywords
- power switch
- switch amplifier
- amplifier
- common
- mode noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/217—Class D power amplifiers; Switching amplifiers
Abstract
The present invention relates to a kind of control methods of power switch amplifier, and in particular to a kind of power switch amplifier common mode noise suppressing method, the common-mode noise for inhibiting to generate in pulsewidth modulation strategy.PWM strategy will generate the quick variation of voltage and then cause differential mode (DM) noise and common mode (CM) noise, and the generation of these noises will interfere the normal work of other sensitive elements, or even influence the normal use of whole system.Power switch amplifier common mode noise suppressing method of the invention, for controlling multiple power switch amplifier concatenation units, it is identical in the switch controlled signal that synchronization inputs each power switch amplifier concatenation unit, and there are two upper switch pipes to connect simultaneously in each power switch amplifier concatenation unit, and two lower switch pipes are connected.The volume and weight of system will be reduced, and reduced or even eliminated common-mode noise, so that the stability of system is higher.
Description
Technical field
The present invention relates to a kind of control methods of power switch amplifier, and in particular to a kind of power switch amplifier common mode
Noise suppressing method, the common-mode noise for inhibiting to generate in pulsewidth modulation strategy.
Background technique
Power switch amplifier is usually by power semiconductor, such as insulated gate bipolar transistor (IGBT), MOSFET
Or other kinds of semiconductor devices.Under normal conditions, in order to control the flow of power of power switch amplifier, using pulsewidth tune
System (PWM) strategy is controlled, and PWM strategy will generate the quick variation of voltage and then cause differential mode (DM) noise and common mode
(CM) noise, and the generation of these noises will interfere the normal work of other sensitive elements, or even influence entire system
The normal use of system.
Therefore, it is necessary to inhibit common-mode noise by adjusting certain control strategy.
Summary of the invention
The purpose of the present invention: a kind of method for designing common-mode noise for inhibiting power switch amplifier.
Power switch amplifier common mode noise suppressing method of the invention, for multiple power switch amplifier stage receipts or other documents in duplicates
Member is controlled, and each power switch amplifier concatenation unit is made of the four-leg inverter that two full-bridge inverters are constituted,
Wherein there are stray capacitance C1u between the input anode and the earth of four-leg inverter, there are miscellaneous between input negative terminal and the earth
Spurious capacitance C1n is connected with paralleing reactor L1 between the output end of one of full-bridge inverter, another full-bridge inverter
Paralleing reactor L2 is connected between output end；The paralleing reactor L1 and balance reactance between adjacent full-bridge inverter
Device L2 connection, the paralleing reactor L1 and paralleing reactor L2 of end full-bridge inverter pass through filter (2) and load line respectively
Enclose (3) connection；
The CM Noise Cancellation realizes the soft of power switch amplifier by adjusting the modulation order of PWM control strategy
Switch control, wherein the switch controlled signal phase inputted in synchronization to each power switch amplifier concatenation unit
Together, and in each power switch amplifier concatenation unit there are two upper switch pipes to connect simultaneously, and two lower switch pipes are connected.
The paralleing reactor L1 uses inductance.
The utility model has the advantages that the present invention inhibits common-mode noise by the change of power switch amplifier control strategy, without increasing
Add additional filter that will reduce the volume and weight of system, and reduced or even eliminated common-mode noise, so that the stabilization of system
Property is higher.
Detailed description of the invention
Fig. 1 is 2 unit cascaded power switch amplifier architecture block diagrams；
Fig. 2 is n unit cascaded power switch amplifier architecture block diagrams；
Fig. 3 is the common mode loop equivalent impedance circuit of concatenated power switching amplifier；
Fig. 4 is 1 common-mode voltage amplitude of on off sequence；
Fig. 5 is 2 common-mode voltage amplitude of on off sequence；
Fig. 6 is 3 common-mode voltage amplitude of on off sequence；
Fig. 7 is 4 common-mode voltage amplitude of on off sequence.
Wherein, 1- power switch amplifier concatenation unit, 2- filter, 3- loading coil, 4- common-mode noise equivalent voltage
Source, 5- filter equivalent impedance, 6- cable equivalent impedance, 7- stray capacitance equivalent impedance
Specific embodiment
Below by specific embodiment, the present invention is described in further detail.
Common mode noise rejection strategy of the invention can realize in power switch amplifier cascade structure, each grade of receipts or other documents in duplicate
Member is made of the four-leg inverter that two full-bridge inverters are constituted.Two full-bridge inverters are connected by two paralleing reactors
It connects, the midpoint of paralleing reactor is used to connect different concatenation units and load.Specific on off sequence is selected to may be implemented two
Purpose, the particular sequence selected first need to guarantee the phase shift between two bridge arms of full-bridge inverter in each concatenation unit,
Enough circulation can be generated to guarantee the realization of zero voltage switch (ZVS)；Secondly, the particular sequence of selection can open power
Close the minimum that common-mode voltage amplitude caused by amplifier controls.In some cases, specific modulation system can will cause altogether
The common-mode voltage of mould electric current completely eliminates.
The circuit block diagram of power switch amplifier cascade structure as shown in Figure 1, the topological structure includes 2 concatenation units 1,
Each unit is powered by independent current source.There are stray capacitance, two concatenation units over the ground in semiconductor devices and power input
It is connected by cable with loading coil 3.
As previously mentioned, common-mode noise will lead to the problem of the Sensitive Apparatus in system serious.Loading coil two
The average eguivalent voltage at end is defined as common-mode voltage, and common-mode voltage serves as noise source, what noise source and equivalent loop circuit impedance generated
Common mode current uses i in two unit cascaded power switch amplifier architecture block diagrams as shown in figure 1cmIt indicates.It makes an uproar to reduce common mode
Sound usually requires filter in the output end of power amplifier.The amplitude of common-mode voltage can be indicated with formula (1) in Fig. 3:
Since the full-bridge inverter of two four bridge legs is connected by paralleing reactor, the midpoint for defining equalization point boat enterprise is electricity
Position O, formula (1) need to meet formula (2):
Not altogether due to two power inputs, voltage can indicate as follows in stray capacitance:
Vc1u=Vc1n+Vdc (3)
Vc2u=Vc2n+Vdc (4)
Vc1u+Vc1n+Vc2u+Vc2n=cons tan t (5)
Based on above various, the stray capacitance (C of the full-bridge inverter of two four bridge legs1u,C2u,C1n,C2n) charging process
It is a transient equilibrium process, i.e., all capacitance voltages are in different switch combinations and are a constants.If it is assumed that spuious
Capacitor C1nAnd C2nWhen switching vector selector (0,0,0,0,0,0) acts on, initial voltage is Vo, C1uAnd C2uInitial voltage be Vo+Vdc。
So, the common-mode voltage under different conditions can be derived according to formula (1)~(5).
The case study on implementation of the influence under different on off sequence effects for common-mode voltage is described below, using on off sequence 1
Pulsewidth modulation strategy, wherein 1 indicates that single bridge arm upper tube is open-minded, down tube shutdown, 0 indicates single bridge arm upper tube shutdown, and down tube is open-minded.
Can derive the common-mode voltage under different conditions according to formula (1)~(5), as shown in figure 4, the amplitude of common-mode noise be ±
0.5Vdc。
1 on off sequence 1 of table
Using the pulsewidth modulation strategy of on off sequence 2, the common mode under different conditions can be derived according to formula (1)~(5)
Voltage, as shown in figure 5, the amplitude of common-mode noise is ± 0.25Vdc, common-mode noise amplitude reduce, centainly inhibited.
2 on off sequence 2 of table
Using the pulsewidth modulation strategy of on off sequence 3, the common mode under different conditions can be derived according to formula (1)~(5)
Voltage, as shown in fig. 6, the amplitude of common-mode noise is ± 0.25Vdc, compared to the control method of on off sequence 1, common-mode noise width
Value reduces, and is centainly inhibited.
3 on off sequence 3 of table
Using the pulsewidth modulation strategy of on off sequence 4, the common mode under different conditions can be derived according to formula (1)~(5)
Voltage, as shown in Figure 7, it can be seen that by the control method of on off sequence 4, can make the amplitude of common-mode noise is 0, will
Common-mode noise complete inhibition.
4 on off sequence 4 of table
Claims (2)
1. a kind of power switch amplifier common mode noise suppressing method, for being carried out to multiple power switch amplifier concatenation units
Control, it is characterised in that: the four bridge legs inversion that each power switch amplifier concatenation unit (1) is made of two full-bridge inverters
Device composition, wherein there are stray capacitance C1u between the input anode and the earth of four-leg inverter, between input negative terminal and the earth
There are stray capacitance C1n, connected between the output end of a full-bridge inverter in each power switch amplifier concatenation unit (1)
There is paralleing reactor L1, paralleing reactor L2 is connected between the output end of another full-bridge inverter；It is opened in adjacent power
It closes the paralleing reactor L1 between the full-bridge inverter of amplifier concatenation unit (1) to connect with paralleing reactor L2, outermost
Between two power switch amplifier concatenation units (1) at end, the paralleing reactor L1 and paralleing reactor L2 of full-bridge inverter
It is connect respectively by filter (2) with loading coil (3)；
The CM Noise Cancellation realizes the Sofe Switch of power switch amplifier by adjusting the modulation order of PWM control strategy
Control, wherein it is identical in the switch controlled signal that synchronization inputs each power switch amplifier concatenation unit, and
And there are two upper switch pipes to connect simultaneously in each power switch amplifier concatenation unit, two lower switch pipes are connected.
2. power switch amplifier common mode noise suppressing method according to claim 1, it is characterised in that: the balance electricity
Anti- device L1 uses inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611049936.9A CN106357225B (en) | 2016-11-24 | 2016-11-24 | A kind of power switch amplifier common mode noise suppressing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611049936.9A CN106357225B (en) | 2016-11-24 | 2016-11-24 | A kind of power switch amplifier common mode noise suppressing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106357225A CN106357225A (en) | 2017-01-25 |
| CN106357225B true CN106357225B (en) | 2019-02-19 |
Family
ID=57862268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611049936.9A Active CN106357225B (en) | 2016-11-24 | 2016-11-24 | A kind of power switch amplifier common mode noise suppressing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106357225B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5442540A (en) * | 1992-06-12 | 1995-08-15 | The Center For Innovative Technology | Soft-switching PWM converters |
| CN1992500A (en) * | 2005-12-27 | 2007-07-04 | 三菱电机株式会社 | Power converting apparatus |
| CN103038990A (en) * | 2008-07-24 | 2013-04-10 | 三菱电机株式会社 | Power converter |
| CN104065259A (en) * | 2013-03-18 | 2014-09-24 | 台达电子工业股份有限公司 | Filter device, power converter and common mode noise inhibiting method |
| CN105210290A (en) * | 2013-04-25 | 2015-12-30 | 株式会社皮尔斯特 | Switching amplifier and control method therefor |
| CN105591537A (en) * | 2014-10-28 | 2016-05-18 | 通用电气公司 | Gradient amplifier, and switching amplifier and operating method thereof |
-
2016
- 2016-11-24 CN CN201611049936.9A patent/CN106357225B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5442540A (en) * | 1992-06-12 | 1995-08-15 | The Center For Innovative Technology | Soft-switching PWM converters |
| CN1992500A (en) * | 2005-12-27 | 2007-07-04 | 三菱电机株式会社 | Power converting apparatus |
| CN103038990A (en) * | 2008-07-24 | 2013-04-10 | 三菱电机株式会社 | Power converter |
| CN104065259A (en) * | 2013-03-18 | 2014-09-24 | 台达电子工业股份有限公司 | Filter device, power converter and common mode noise inhibiting method |
| CN105210290A (en) * | 2013-04-25 | 2015-12-30 | 株式会社皮尔斯特 | Switching amplifier and control method therefor |
| CN105591537A (en) * | 2014-10-28 | 2016-05-18 | 通用电气公司 | Gradient amplifier, and switching amplifier and operating method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106357225A (en) | 2017-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11088632B2 (en) | Multi-channel inverter systems including coupled inductors | |
| Prabhakar et al. | Dynamic hysteresis current control to minimize switching for three-phase four-leg VSI topology to compensate nonlinear load | |
| Pereira et al. | SVC PLUS: An MMC STATCOM for network and grid access applications | |
| Li et al. | Robust control scheme for a microgrid with PFC capacitor connected | |
| AU2011370316B2 (en) | A compensating system for medium or high voltage applications | |
| CN107204630B (en) | Have the island NPC type power supply high-accuracy control methods of fast dynamic response concurrently | |
| Tan et al. | Multiple harmonic elimination‐based feedback controller for Shunt Hybrid Active Power Filter | |
| CN105470963A (en) | Active power filter and control method therefor | |
| Liang et al. | Investigation on pulse‐width amplitude modulation‐based single‐phase quasi‐Z‐source photovoltaic inverter | |
| Liu et al. | Admittance modeling, analysis, and reshaping of harmonic control loop for multiparalleled SAPFs system | |
| Li et al. | Structure analysis and sliding mode control of new dual quasi‐Z‐source inverter in microgrid | |
| Sreedhar et al. | New harmonic mitigation scheme for modular multilevel converter–an experimental approach | |
| CN102823122B (en) | Have second and the 3rd order harmonics reduce the modular multistage power converter of filter | |
| Rangampet | Overview of double tuned harmonic filters in improving power quality under nonlinear load conditions | |
| Tu et al. | Research of the high supply voltage quality control for solid‐state transformer | |
| CN106357225B (en) | A kind of power switch amplifier common mode noise suppressing method | |
| RU2631678C1 (en) | Reactor group, switched by thyristors | |
| Kadam et al. | Voltage Distortion at Distribution side reduced by Modified UPQC | |
| Jovcic et al. | Frequency-domain analytical model for a cascaded multilevel STATCOM | |
| Scheuer | Investigation of the 3-level voltage source inverter (VSI) for flexible ac-transmission systems (FACTS) exemplified on a static var compensator (SVC) | |
| Anurag et al. | Solid state transformer for medium voltage grid applications enabled by 10 kv sic mosfet based three-phase converter systems | |
| Rahman et al. | A power balance control architecture for multiple active bridge converter in a solidstate transformer | |
| Liu et al. | Sliding mode control of solid state transformer using a three-level hysteresis function | |
| Dongare et al. | Mitigation of lower order harmonics in a grid-connected single-phase PV inverter using shunt active filter | |
| Kumar et al. | Integration Of UPQC With New Converter Transformer For Power Quality Improvement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |