CN106452121A - Adjustable excitation power supply of electric vibration table - Google Patents
Adjustable excitation power supply of electric vibration table Download PDFInfo
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- CN106452121A CN106452121A CN201610929202.3A CN201610929202A CN106452121A CN 106452121 A CN106452121 A CN 106452121A CN 201610929202 A CN201610929202 A CN 201610929202A CN 106452121 A CN106452121 A CN 106452121A
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- circuit
- power supply
- vibration table
- electric vibration
- rectifier transformer
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/162—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
- H02M7/1623—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration with control circuit
- H02M7/1626—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration with control circuit with automatic control of the output voltage or current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention relates to the technical field of power conversion, and particularly relates to an adjustable excitation power supply of an electric vibration table. The adjustable excitation power supply comprises an excitation switching device, a rectifier transformer, a trigger control circuit, a full-control rectification circuit and a filter circuit, and is characterized in that the full-control rectification circuit and the filter circuit are sequentially connected with a static coil of the electric vibration table in parallel, an input end of the rectifier transformer is connected with a three-phase AC power supply, an output end of the rectifier transformer is connected with the full-control rectification circuit, the excitation switching device comprises a plurality of AC contactors, the plurality of AC contactors are connected with the input end of the rectifier transformer, and each AC contactor corresponds to a voltage transformation gear so as to switch the voltage transformation gears of the rectifier transformer through controlling on-off of the AC contactors; and the trigger control circuit is connected with the full-control rectification circuit. According to the invention, corresponding voltage transformation gears can be selected, and each gear outputs 70%-100% of rated voltage of the corresponding gear, so that harmonic current is greatly reduced, the excitation power supply can operate normally for a long time, a whole-course continuous adjustable function is realized, and the universality and the reliability of the excitation power supply are improved.
Description
Technical field
The present invention relates to power converter technical field, the adjustable excited power supply of more particularly, to a kind of electric vibration table.
Background technology
Electric vibration table utilizes electromagnetic principles to produce vibration at present, can carry out dynamic environmental test to product and test specimen
And reliability test, it is widely used in the industries such as defence and military, Aero-Space, ship, railway, automobile, electronics.As Fig. 1 institute
Show, electric vibration table system is mainly made up of vibration stage body 10, power amplifier 20, field power supply 30, controller 40, and it is main
The field power supply 30 of one of part be used to stage body 10 to vibration quiet circle 4 winding power thus producing the equipment of stationary magnetic field.
The operation principle of field power supply is to obtain three-phase alternating current from electrical network, is then passed through three phase rectifier, filtering obtains unidirectional current, sends into
Vibration table Jing Quan.Traditional vibration table field power supply adopts the uncontrollable rectifier circuit structure of three-phase bridge, and rectifier cell is using electricity
Three-phase alternating current is rectified into the fixing unidirectional current of voltage using diode nature commutation, due to its circuit structure by power diode
Simply, output DC voltage harmonic wave is less, is widely used.But the commutating voltage of traditional field power supply is uncontrollable,
The regulation of exciting power cannot be realized, in the test of little magnitude or time-out test, field power supply full power operation all the time, consume
Big energy.The producer having later to solve this problem using controllable silicon, and application three-phase full-bridge controlled rectifier realizes excitation
Voltage-regulation function, but the voltage regulation limits of this device typically between the 70%～100% of rated output voltage,
Usually can not work long hours because harmonic current is excessive during low-voltage output.Because excitation voltage can not whole process continuously adjust,
The shaking table system of different model can not share field power supply, which also limits the use object of every suit field power supply, to shaking
Dynamic platform system research and development designer causes great trouble.Additionally due to vibration table Jing Quan is inductive coils, in excitation
There is larger counter electromotive force in power-off moment, often result in power supply and damage, and existing field power supply is in default of corresponding
Protection circuit causing trouble rate is high, poor reliability.
Content of the invention
(1) technical problem to be solved
The technical problem to be solved in the present invention be solve existing electric vibration table field power supply commutating voltage uncontrollable,
The regulation of exciting power cannot be realized, in the test of little magnitude or time-out test, field power supply full power operation all the time, consume
The problem of big energy.
(2) technical scheme
In order to solve above-mentioned technical problem, the invention provides a kind of adjustable excited power supply of electric vibration table, including excitation
Switching device, rectifier transformer, trigger control circuit and all controlled rectifier circuit in parallel with the quiet circle of electric vibration table successively
And filter circuit, the input of described rectifier transformer is connected with three-phase alternating-current supply, outfan and described all controlled rectifier circuit
Connect, described magnetic excitation switching apparatus for electricity driving includes multiple A.C. contactors, multiple described A.C. contactors all with described rectifier transformer
Input connect, the transformation gear of the corresponding described rectifier transformer of each described A.C. contactor, with each by controlling
Described A.C. contactor break-make is thus switch the transformation gear of described rectifier transformer；Described trigger control circuit and described full control
Rectification circuit connects.
Wherein, described all controlled rectifier circuit is formed in parallel for a plurality of rectification circuit, and every described rectification circuit includes two
The controllable silicon of series connection, described silicon controlled triggering end is connected with described trigger control circuit.
Wherein, also include absorbing circuit, described absorbing circuit is in parallel with controllable silicon each described respectively, described absorbing circuit
Including resistance capaciting absorpting circuit and varistor, described resistance capaciting absorpting circuit and varistor are in parallel.
Wherein, also include protection circuit, described protection circuit includes temperature switch and counter electromotive force absorption plant, described temperature
Degree switch is arranged on the radiator of described rectification circuit, described counter electromotive force absorption plant include the diode that is connected in series and
Resistance, is arranged between described filter circuit and the quiet circle of described electric vibration table and in parallel with described all controlled rectifier circuit, institute
The sense of current stated in counter electromotive force absorption plant is contrary with the sense of current in described rectification circuit.
Wherein, described rectifier transformer includes armature winding and secondary windings, each described A.C. contactor and described primary
Winding connects, and described secondary windings connect formation triangular structure, and described all controlled rectifier circuit includes three described rectification circuits,
Three power output ends of described secondary windings and three described rectification circuits connect one to one, and each described power supply output
End is connected between two described controllable silicons of its corresponding described rectification circuit.
Wherein, when described transformation gear is two gears, described magnetic excitation switching apparatus for electricity driving includes two described ac contactors
Device, a described A.C. contactor is in parallel with described armature winding, another described A.C. contactor and described armature winding string
Connection, can make described armature winding in triangle and two kinds of attachment structures of star to realize individually connecting a described A.C. contactor
Middle switching.
Wherein, described filter circuit is electrochemical capacitor in parallel.
Wherein, described trigger control circuit is CA6100 control machines plate.
(3) beneficial effect
The technique scheme of the present invention has the advantage that：The adjustable excited power supply of electric vibration table of the present invention, three intersect
Stream electricity first passes around magnetic excitation switching apparatus for electricity driving and selects corresponding gear, is then passed through rectifier transformer transformation and enters full-controlled rectifier electricity
Road, by the rectified action of all controlled rectifier circuit and trigger control circuit, the circuit filter after filtering of the Rectified alternating current after rectification
Except AC ripple obtains the Jing Quan that galvanic current sends into electric vibration table, magnetic excitation switching apparatus for electricity driving effect is used to select rectification
Transformer gear, typically point 2 to 3 gears are it is also possible to need point more gears according to different experiments, using multiple ac contactors
Device connects different rectifier transformer taps to control, or after the winding connection of replacing rectifier transformer, then control even
Connecing different rectifier transformer taps, thus changing the transformation ratio of rectifier transformer winding, finally changing the defeated of rectifier transformer
Go out voltage.Corresponding transformation gear can be selected as needed by this present invention, each shelves can export the specified electricity of this gear
The 70%～100% of pressure, so can greatly reduce harmonic current, in low-voltage output can normal work for a long time,
Reduce energy resource consumption, realize whole continuously adjustabe function, be suitable for the shaking table system of disposable type, improve the logical of field power supply
With property and reliability.
Except described above present invention solves the technical problem that, the technical characteristic of technical scheme that constitutes and have this
Outside the advantage that the technical characteristic of a little technical schemes is brought, the other technical characteristics of the present invention and these technical characteristics bring
Advantage, will combine accompanying drawing and further illustrate.
Brief description
Fig. 1 is the structural representation of electric vibration table system in prior art；
Fig. 2 is the principle schematic of the adjustable excited power supply of electric vibration table of the present invention；
Fig. 3 is the structural representation of the adjustable excited power supply of electric vibration table of the present invention；
Fig. 4 is the structural representation of the absorbing circuit of the adjustable excited power supply of electric vibration table of the present invention.
In figure：10：Vibration stage body；20：Power amplifier；30：Field power supply；40：Controller；1：Magnetic excitation switching apparatus for electricity driving；
2：Rectifier transformer；3：Trigger control circuit；4：Jing Quan；5：All controlled rectifier circuit；6：Filter circuit；7：Absorbing circuit；8：Protect
Protection circuit；9：Three-phase alternating-current supply；11：A.C. contactor；21：Armature winding；22：Secondary windings；51：Rectification circuit；511：
Controllable silicon；71：Resistance capaciting absorpting circuit；72：Varistor；81：Counter electromotive force absorption plant；811：Diode；812：Resistance.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of not making creative work, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can
To be to be mechanically connected or electrical connection；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Additionally, in describing the invention, unless otherwise stated, " multiple ", " many ", " multigroup " be meant that two or
Two or more, " several ", " some ", " some groups " are meant that one or more.
As shown in Figures 2 and 3, the adjustable excited power supply of electric vibration table provided in an embodiment of the present invention, including excitation switching
Device 1, rectifier transformer 2, trigger control circuit 3 and all controlled rectifier circuit 5 in parallel with the quiet circle 4 of electric vibration table successively
With filter circuit 6, the input of rectifier transformer 2 is connected with three-phase alternating-current supply 9, and the outfan of rectifier transformer 2 is controlled with complete
Rectification circuit 5 connects, and magnetic excitation switching apparatus for electricity driving 1 includes multiple A.C. contactors 11, and multiple A.C. contactors 11 are all and rectifier transformer
The input of device 2 connects, and the transformation gear of the corresponding rectifier transformer 2 of each A.C. contactor 11, with by controlling each friendship
Stream catalyst 11 break-make is thus switch the transformation gear of rectifier transformer 2；Trigger control circuit 3 is connected with all controlled rectifier circuit 5.
The adjustable excited power supply of electric vibration table of the present invention, three-phase alternating current first pass around magnetic excitation switching apparatus for electricity driving select corresponding
Gear, is then passed through rectifier transformer transformation and enters all controlled rectifier circuit, by all controlled rectifier circuit and trigger control circuit
Rectified action, circuit filters AC ripple and obtains galvanic current and send into electronic shaking the Rectified alternating current after rectification after filtering
The Jing Quan of dynamic platform, magnetic excitation switching apparatus for electricity driving effect is used to select rectifier transformer gear, and typically point 2 to 3 gears are it is also possible to root
Need point more gears according to different experiments, to be controlled using multiple A.C. contactors and to connect different rectifier transformer taps, or
After person changes the winding connection of rectifier transformer, then control the different rectifier transformer taps of connection, thus changing rectification
The transformation ratio of Transformer Winding, the final output voltage changing rectifier transformer.Phase can be selected as needed by this present invention
The transformation gear answered, each shelves can export the 70%～100% of this gear rated voltage, so can greatly reduce humorous
Ripple electric current, in low-voltage output can normal work for a long time, reduce energy resource consumption, realize whole continuously adjustabe function, fit
With the shaking table system of disposable type, improve versatility and the reliability of field power supply.
Wherein, all controlled rectifier circuit 5 is formed in parallel for a plurality of rectification circuit 51, and every rectification circuit 51 includes two series connection
Controllable silicon 511, the triggering end of controllable silicon 511 is connected with trigger control circuit 3.Rectification circuit is by two high-power silicon controlled rectifiers
It is composed in series, all controlled rectifier circuit is a plurality of rectification circuit three-phase full-bridge controlled rectifier being formed in parallel, can be by three-phase
Convert alternating current becomes Rectified alternating current.Silicon controlled triggering end is connected with trigger control circuit, according to the gain-adjusted of user, touches
Send out control circuit and adjust silicon controlled gate pole delay Trigger Angle, thus obtaining the commutating voltage output specified.
Specifically, as shown in figure 4, the adjustable excited power supply of electric vibration table of the present invention also includes absorbing circuit 7, absorbing circuit
7 is in parallel with each controllable silicon 511 respectively, and absorbing circuit 7 includes resistance capaciting absorpting circuit 71 and varistor 72, resistance capaciting absorpting circuit
71 and varistor 72 in parallel.In order to suppress silicon controlled voltage build-up rate in full-controlled rectifier main circuit, the present invention also designs
Absorbing circuit, is mainly made up of resistance capaciting absorpting circuit, is connected in parallel on controllable silicon two ends, controllable silicon so can be avoided to mislead,
Protection rectifier cell.Simultaneously in order to suppress be struck by lightning etc. reason produce short time, peak value, big energy overvoltage damage controlled
Silicon, also has the varistor protection in parallel with resistance capaciting absorpting circuit in absorbing circuit, absorbing circuit needs close proximity to controllable silicon
To reduce circuit stray inductance.
Wherein, the adjustable excited power supply of electric vibration table of the present invention also includes protection circuit 8, and protection circuit 8 includes temperature and opens
Close and counter electromotive force absorption plant 81, temperature switch is arranged on the radiator of rectification circuit 51, counter electromotive force absorption plant 81
Including the diode 811 being connected in series and resistance 812, be arranged between filter circuit 6 and the quiet circle 4 of electric vibration table and with complete
Control rectifying circuit 5 is in parallel, and the sense of current in counter electromotive force absorption plant 81 is contrary with the sense of current in rectification circuit 51.For
Solve the problems, such as that existing field power supply fault rate is high, the present invention devises protection circuit, comprise two temperature switches and one
Counter electromotive force absorption plant.Temperature switch is arranged on the radiator of rectification circuit, selects temperature highest local as far as possible, is used for
Protection reverse-blocking tetrode thyristor pipe is unlikely to overheated and burns.Counter electromotive force absorption plant is by a diode and a resistance string joint group
Become, be connected in reverse parallel in the power output end of all controlled rectifier circuit, when the Jing Quan of electric vibration table produces counter electromotive force, electric current leads to
Cross diode and resistance release, supply unit is played a protective role, improves the safety of system.
Therefore the absorbing circuit of the present invention and protection circuit can effectively absorb the due to voltage spikes that reverse-blocking tetrode thyristor produces, and protect
Shield rectifier cell, plays reliability and the safety of raising system, extends the service life effect of field power supply.
Further, rectifier transformer 2 includes armature winding 21 and secondary windings 22, each A.C. contactor 11 with primary around
Group 21 connection, secondary windings 22 connect and form triangular structure, and all controlled rectifier circuit 5 includes three rectification circuits 51, secondary around
Three power output ends of group 22 are connected one to one with three rectification circuits 51, and each power output end is connected to its correspondence
Two controllable silicons 511 of a rectification circuit 51 between.The input of rectifier transformer is designed to multichannel tap, and outfan is
Single tap, for providing the voltage change ratio of different gears.The secondary windings of rectifier transformer connect triangularity, can make 3
The higher hamonic wave of multiple is suppressed and causes voltage distortion without scurrying into AC network.100% He can be obtained by this switching
The rectifier transformer no-load voltage ratio of 70% two gear.
Wherein, filter circuit 6 is electrochemical capacitor in parallel.
Wherein, trigger control circuit 3 is CA6100 control machines plate.Trigger control circuit selects CA6100 controllable silicon to touch
Send out plate, it has universal performance, for controlling silicon controlled gate pole to postpone Trigger Angle, thus realizing phase shifting control.0～5V's is straight
Stream input voltage signal, can control the phase shift range of output pulse adjustable from 5 °～175 ° continuously linear.CA6100 trigger board
Integrate the functions such as open-phase protection, soft start, function dense degree higher it is not necessary to go again in addition to design detection control circuit,
Ensure that effective transmission of control signals, drastically increase the reliability of excitation power system.Its powerful, reliability
Property high, thus improve the reliability of excitation power system.Totally 6 silicon controlled triggering ends in all controlled rectifier circuit in the present invention
It is connected directly on CA6100 control machines plate, according to the gain-adjusted of user, CA6100 control machines plate is adjusted can
The gate pole of control silicon postpones Trigger Angle, thus obtaining the commutating voltage output specified.
As shown in figure 3, when transformation gear is two gears, magnetic excitation switching apparatus for electricity driving 1 includes two A.C. contactors 11, one
Individual A.C. contactor 11 is in parallel with armature winding 21, and another A.C. contactor 11 is connected with armature winding 21, to realize individually
One A.C. contactor 11 of connection can make armature winding 21 switch in triangle and two kinds of attachment structures of star.
The adjustable excited power supply of electric vibration table that the present embodiment provides has two transformation gears, three-phase alternating-current supply directly with
Magnetic excitation switching apparatus for electricity driving is connected, and magnetic excitation switching apparatus for electricity driving comprises two A.C. contactors, and series and parallel is in the primary of rectifier transformer respectively
In winding, the gear according to user selects, two A.C. contactor adhesives respectively, so that the armature winding of rectifier transformer
Star and two kinds of connected modes of triangle switch, that is, when the A.C. contactor of series connection is connected, A.C. contactor in parallel breaks
When opening, armature winding is Y-connection mode, when A.C. contactor in parallel is connected, and the A.C. contactor of series connection disconnects, just
Level winding is triangle connected mode,
In sum, the adjustable excited power supply of electric vibration table of the present invention, three-phase alternating current first passes around magnetic excitation switching apparatus for electricity driving
Select corresponding gear, be then passed through rectifier transformer transformation and enter all controlled rectifier circuit, by all controlled rectifier circuit and triggering
The rectified action of control circuit, circuit filters AC ripple and obtains galvanic current the Rectified alternating current after rectification after filtering
Send into the Jing Quan of electric vibration table, magnetic excitation switching apparatus for electricity driving effect is used to select rectifier transformer gear, typically point 2 to 3 shelves
Position, it is also possible to need point more gears according to different experiments, to be controlled using multiple A.C. contactors and to connect different rectifications changes
After depressor tap, or the winding connection of replacing rectifier transformer, then control the different rectifier transformer taps of connection, from
And change the transformation ratio of rectifier transformer winding, the final output voltage changing rectifier transformer.Can basis by this present invention
Need to select corresponding transformation gear, each shelves can export the 70%～100% of this gear rated voltage, so can pole
Big reduction harmonic current, in low-voltage output can normal work for a long time, reduce energy resource consumption, realize whole process and continuously may be used
Conditioning function, is suitable for the shaking table system of disposable type, improves versatility and the reliability of field power supply.
Finally it should be noted that：Above example only in order to technical scheme to be described, is not intended to limit；Although
With reference to the foregoing embodiments the present invention is described in detail, it will be understood by those within the art that：It still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to wherein some technical characteristics；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (8)
1. a kind of adjustable excited power supply of electric vibration table it is characterised in that：Including magnetic excitation switching apparatus for electricity driving, rectifier transformer, triggering
Control circuit and all controlled rectifier circuit in parallel with the quiet circle of electric vibration table successively and filter circuit, described rectifier transformer
Input be connected with three-phase alternating-current supply, outfan is connected with described all controlled rectifier circuit, and described magnetic excitation switching apparatus for electricity driving includes
Multiple A.C. contactors, multiple described A.C. contactors are all connected with the input of described rectifier transformer, each described exchange
The transformation gear of the corresponding described rectifier transformer of catalyst, with by controlling each described A.C. contactor break-make thus switching
The transformation gear of described rectifier transformer；Described trigger control circuit is connected with described all controlled rectifier circuit.
2. the adjustable excited power supply of electric vibration table according to claim 1 it is characterised in that：Described all controlled rectifier circuit is
A plurality of rectification circuit is formed in parallel, and every described rectification circuit includes the controllable silicon of two series connection, described silicon controlled triggering end
It is connected with described trigger control circuit.
3. the adjustable excited power supply of electric vibration table according to claim 2 it is characterised in that：Also include absorbing circuit, institute
State absorbing circuit in parallel with controllable silicon each described respectively, described absorbing circuit includes resistance capaciting absorpting circuit and varistor, institute
State resistance capaciting absorpting circuit and varistor is in parallel.
4. the adjustable excited power supply of electric vibration table according to claim 2 it is characterised in that：Also include protection circuit, institute
State protection circuit and include temperature switch and counter electromotive force absorption plant, described temperature switch is arranged at the radiating of described rectification circuit
On device, described counter electromotive force absorption plant includes diode and the resistance being connected in series, be arranged at described filter circuit with described
The sense of current between the quiet circle of electric vibration table and in parallel with described all controlled rectifier circuit, in described counter electromotive force absorption plant
Contrary with the sense of current in described rectification circuit.
5. the adjustable excited power supply of the electric vibration table according to claim 1-4 any one it is characterised in that：Described rectification
Transformator includes armature winding and secondary windings, and each described A.C. contactor is connected with described armature winding, described secondary windings
Connect and form triangular structure, described all controlled rectifier circuit includes three described rectification circuits, three electricity of described secondary windings
Source output terminal is connected one to one with three described rectification circuits, and each described power output end is connected to its corresponding one
Between two described controllable silicons of described rectification circuit.
6. the adjustable excited power supply of electric vibration table according to claim 5 it is characterised in that：When described transformation gear is two
During individual gear, described magnetic excitation switching apparatus for electricity driving includes two described A.C. contactors, a described A.C. contactor and described primary
Winding parallel, another described A.C. contactor and described primary windings connected in series, connect with realizing individually connecting a described exchange
Tentaculum can make described armature winding switch in triangle and two kinds of attachment structures of star.
7. the adjustable excited power supply of electric vibration table according to claim 5 it is characterised in that：Described filter circuit is parallel connection
Electrochemical capacitor.
8. the adjustable excited power supply of electric vibration table according to claim 5 it is characterised in that：Described trigger control circuit is
CA6100 control machines plate.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107202673A (en) * | 2017-06-02 | 2017-09-26 | 上海千黎电气科技有限公司 | The excitation control method and device and its electric vibration testing monitoring system and electric vibration testing method of electric vibration table |
| CN112731013A (en) * | 2020-12-17 | 2021-04-30 | 温州大学乐清工业研究院 | Anechoic chamber AC/DC multi-magnetic circuit device for detecting low-voltage electrical appliance products |
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