CN108445953A - A kind of alternating current-direct current variable voltage source - Google Patents
A kind of alternating current-direct current variable voltage source Download PDFInfo
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- CN108445953A CN108445953A CN201810536763.6A CN201810536763A CN108445953A CN 108445953 A CN108445953 A CN 108445953A CN 201810536763 A CN201810536763 A CN 201810536763A CN 108445953 A CN108445953 A CN 108445953A
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- 238000010168 coupling process Methods 0.000 claims abstract description 35
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 15
- 229910052710 silicon Inorganic materials 0.000 claims description 15
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- 238000012360 testing method Methods 0.000 abstract description 15
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- 208000027418 Wounds and injury Diseases 0.000 abstract description 3
- 208000014674 injury Diseases 0.000 abstract description 3
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- 230000015556 catabolic process Effects 0.000 description 3
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- 230000008878 coupling Effects 0.000 description 2
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- 238000010009 beating Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is DC
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
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Abstract
The invention discloses a kind of alternating current-direct current variable voltage sources, including AC power interface, air switch, Regulation Control unit, at least one exchange output unit and at least one DC output unit, AC power interface is connect by air switch with the ac input end of the Regulation Control unit, the pressure regulation output end of Regulation Control unit is connect with exchange output unit and DC output unit respectively, the Regulation Control unit includes that single-phase self-coupling pressure regulator and voltage adjust change-over switch, AC power interface is connect by air switch with the input terminal of the single-phase self-coupling pressure regulator, the pressure regulation of single-phase self-coupling pressure regulator exports the defeated input terminal for adjusting change-over switch with the voltage respectively and connect.The variable voltage source of the present invention exports corresponding voltage source in exchange output wiring terminal or direct current output connecting terminal；When occurring electric voltage exception in adjustment process, alternating current supply can be cut off and protect this adjustable device injury-free to improve the safety operation performance of test.
Description
Technical field
The invention belongs to electrical test power technique fields more particularly to a kind of alternating current-direct current variable voltage sources.
Background technology
For being played a crucial role in the alternating current-direct current pressure test of power switchgear, and in numerous cumbersome electricity
In gas pilot project, required power supply type also differs in the project tested every time, and some pilot projects need to connect
AC power is connect, some pilot projects need to connect DC power supply, and the power of alterating and direct current needed for testing both is from various power transformations
System, the voltage source degree of regulation of output is low, speed governing is slow, high noise, and cannot be adjusted according to the size of required voltage,
And malfunction is susceptible in adjustment process, and it is higher to testing crew Capability Requirement, once there is short circuit now in test
As when, it will transformer substation system is caused greatly to lose, in addition, electrical test personnel are during the test, due to working site
Complicated, security error is not in place, testing crew awareness of safety is not strong etc., and reasons cause the accident of personnel frequently to occur, and seriously affect
The personal safety of experimental work personnel, reduces working efficiency.
Invention content
The purpose of the present invention is to provide a kind of alternating current-direct current variable voltage source, variable voltage source of the invention is exported in exchange
Connecting terminal or direct current output connecting terminal export corresponding voltage source；When occurring electric voltage exception in adjustment process, it can be cut off
Alternating current supplies, and to improve the safety operation performance of test, protects this adjustable device injury-free, to realize above-mentioned technical side
Case, the present invention use following technique effect：
According to the one side that this hair is invented, a kind of alternating current-direct current variable voltage source, including AC power interface, limit are provided
Stream protection control unit, Regulation Control unit, at least one exchange output unit and at least one DC output unit, it is described
AC power interface is connect by inputting current-limiting protection control unit with the ac input end of the Regulation Control unit, the tune
The pressure regulation output end of pressure control unit is connect with the exchange output unit and DC output unit respectively, the current-limiting protection control
Unit processed includes air switch, and the Regulation Control unit includes single-phase self-coupling pressure regulator and voltage adjusts change-over switch, described
AC power interface is connect by air switch with the input terminal of the single-phase self-coupling pressure regulator, the single-phase self-coupling pressure regulator
Pressure regulation exports the defeated input terminal for adjusting change-over switch with the voltage respectively and connect, and the voltage adjusts the output point of change-over switch
It is not connect with exchange output unit and DC output unit, to realize at least one set of alternating-current voltage source and at least one set of direct current
Potential source exports.
Preferably, the exchange output unit includes the exchange display device being connected in parallel with each other and exchange outlet terminal
Son, the DC output unit include single-phase rectifier module, direct current acquisition control module and direct current output connecting terminal, the sky
The ac output end that air cock also adjusts change-over switch by Regulation Control unit and voltage exchanges display device with described respectively
It is electrically connected with output wiring terminal is exchanged；The voltage adjusts the DC output end of change-over switch and the single-phase rectifier module
Ac input end connects, and the DC output end of the single-phase rectifier module is defeated with the direct current acquisition control module and direct current respectively
Go out connecting terminal electrical connection.
Preferably, the Regulation Control unit is including further including A.C. contactor, voltage relay, electric current relay, limit
Bit switch, normally closed push button switch, normally open push button switch, the first intermediate relay, the second intermediate relay, the first indicator light,
Two indicator lights, third indicator light and the 4th indicator light；The cathode output end and cathode output end of the air switch pass through respectively
The master control contact for stating A.C. contactor is connect with the first input end of the single-phase self-coupling pressure regulator and the second input terminal, the list
Second input terminal of phase automatic coupling voltage regulator also adjusts the 6th input terminal of change-over switch with the voltage respectively, voltage is adjusted and converted
One end electrical connection of the 8th input terminal and voltage relay of switch, the cathode output end of the air switch respectively with it is normally closed
One end of button switch, one end of the second normally-closed contact of A.C. contactor, A.C. contactor third normally opened contact one end,
One end of the normally opened contact of electric current relay, one end of normally opened contact of the first intermediate relay, the normally opened of voltage relay touch
One end electrical connection of the normally opened contact of point and the second intermediate relay, the adjusting output end difference of the single-phase self-coupling pressure regulator
The 8th input terminal that change-over switch is adjusted with one end of voltage relay, the other end of electric current relay and voltage is electrically connected,
The voltage adjusts the first input end of change-over switch and voltage adjust the 7th input terminal of change-over switch respectively with it is parallel with one another
The exchange display device of connection adjusts the third input terminal of change-over switch with output wiring terminal electrical connection, the voltage is exchanged
With voltage adjust change-over switch the 5th output end by single-phase rectifier module respectively with the direct current acquisition control module and directly
Flow output wiring terminal electrical connection；
The other end of the normally closed push button switch respectively with one end of the normally open push button switch and A.C. contactor
One end of one normally opened contact connects, the other end of normally open push button switch by limit switch respectively with one end of A.C. contactor,
The other end of first normally opened contact of A.C. contactor connects, and the other end of A.C. contactor passes through the normal of the first intermediate relay
Closed contact is connect with the cathode output end of the air switch；The other end of second normally-closed contact of the A.C. contactor passes through
First indicator light is connect with the cathode output end of the air switch, and the other end of the third normally opened contact of A.C. contactor passes through
Second indicator light is connect with the cathode output end of the air switch；In the other end of the normally opened contact of electric current relay and first
Between relay normally opened contact other end connection after one end with one end of the first intermediate relay and third indicator light respectively
Connection, the other end of intermediate relay and the other end of third indicator light are connect with the cathode output end of the air switch；Electricity
The other end of the normally opened contact of potential relay connect with the other end of the normally opened contact of the second intermediate relay after respectively with second
One end of intermediate relay is connected with one end of the 4th indicator light, the other end of the second intermediate relay and the 4th indicator light it is another
One end is connect with the cathode output end of the air switch
Said program is it is further preferred that the output voltage that adjusts of the single-phase self-coupling pressure regulator (1TC) is 0-250V's
Alternating voltage.
Said program is it is further preferred that the direct current acquisition control module includes D.C. voltmeter and potentiometer R0, institute
State the cathode output end of single-phase rectifier module respectively with the anode of the direct current output connecting terminal, D.C. voltmeter anode and
One end of potentiometer R0 connects, and the cathode of D.C. voltmeter is connect with potentiometer R0 center adjustments end, and the potentiometer R0's is another
One end is connect with the cathode output end of the cathode of the direct current output connecting terminal and single-phase rectifier module.
Said program is it is further preferred that the direct current acquisition control module includes D.C. voltmeter, inductance L1, capacitance
C1, capacitance C2, capacitance C3, resistance R2, adjustable resistance R1, silicon-controlled D1 and diode D2, the D.C. voltmeter, inductance L1,
Capacitance C1, the cathode output end of the single-phase rectifier module respectively with the anode of the D.C. voltmeter, one end of inductance L1, electricity
Hold the anode connection of C1, the other end of the inductance L1 respectively with one end of the capacitance C2, direct current output connecting terminal just
The anode connection of pole output end, silicon-controlled D1, cathode output end, the direct current of the cathode of silicon-controlled D1 and the single-phase rectifier module
Voltmeter) cathode, the cathode of capacitance C1, the other end of capacitance C2 connected with the cathode output end of direct current output connecting terminal,
The other end of the adjustable resistance R1 is connect with the anode of diode D2, the cathode of the diode D2 respectively with the one end resistance R2
It is connected with one end of capacitance C3, the control pole of the silicon-controlled D1 connects with the other end of the resistance R2 and the other end of capacitance C3
It connects.
Said program is it is further preferred that the alternating voltage that the voltage of alternating-current voltage source output is 0-250V, direct current
The direct current that the voltage of voltage source output is 0-230V.
In conclusion due to present invention employs above-mentioned technical proposal, the present invention has the following technical effects：
(1), the present invention can be connect by adjusting voltage adjusting change-over switch with single-phase self-coupling pressure regulator 1TC exchanging output
Line terminals or direct current output connecting terminal export corresponding voltage source；When occurring electric voltage exception in adjustment process, alternating current can be cut off
Supply protects this adjustable device injury-free to improve the safety operation performance of test.
(2), the present invention is during DC adjustment, by that can reduce alternating current-direct current component proportion after filtering, due to voltage source
Appearance it is excessive or short-circuit when, automatically starting voltage-stabilizing protection simultaneously carries out rapid overpressure protection, prevents DC load due to overvoltage
Damage, and the size that can adjust voltage source output in real time provides surely into automatic protection, and for DC load (by test device)
Constant voltage, and voltage-stabilizing protection is simple, and device is few, at low cost, efficient.
Description of the drawings
Fig. 1 is a kind of functional block diagram of alternating current-direct current variable voltage source of the present invention；
Fig. 2 is a kind of fundamental diagram of alternating current-direct current variable voltage source first embodiment of the present invention；
Fig. 3 is a kind of fundamental diagram of alternating current-direct current variable voltage source second embodiment of the present invention；
Fig. 4 is that a kind of work of the direct current acquisition control module of alternating current-direct current variable voltage source second embodiment of the present invention is former
Reason figure.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, referring to the drawings and preferred reality is enumerated
Example is applied, the present invention is described in more detail.However, it is necessary to illustrate, many details listed in specification are only to be
Making reader, there are one thorough explanations to one or more aspects of the present invention, even without these specific details can also
Realize the aspects of the invention.
As depicted in figs. 1 and 2, a kind of alternating current-direct current variable voltage source according to the present invention, including AC power interface, current limliting
Protect control unit, Regulation Control unit, at least one exchange output unit and at least one DC output unit, alternating current
Source interface is AC socket interface, and mains supply is accessed from AC socket interface, and the AC power interface is by inputting current limliting
Protection control unit is connect with the ac input end of the Regulation Control unit, the pressure regulation output end point of the Regulation Control unit
It is not connect with the exchange output unit and DC output unit, the current-limiting protection control unit includes air switch 1QF, institute
It includes that single-phase self-coupling pressure regulator 1TC and voltage adjust AC power interface described in change-over switch SA and passes through sky to state Regulation Control unit
Air cock 1QF is connect with the input terminal of the single-phase self-coupling pressure regulator 1TC, the pressure regulation output of the single-phase self-coupling pressure regulator 1TC
The defeated input terminal for adjusting change-over switch SA with the voltage respectively connect, the output of the voltage adjusting change-over switch SA respectively with
Exchange output unit is connected with DC output unit, to realize at least one set of alternating-current voltage source and at least one set of direct voltage source
Output；
The exchange output unit includes the exchange display device being connected in parallel with each other and exchange output wiring terminal, described
DC output unit includes single-phase rectifier module, direct current acquisition control module and direct current output connecting terminal, the air switch
1QF also by Regulation Control unit and voltage adjust the ac output end of change-over switch SA respectively with it is described exchange display device and
Exchange output wiring terminal electrical connection；The voltage adjusts the DC output end of change-over switch SA and the single-phase rectifier module
Ac input end connects, and the DC output end of the single-phase rectifier module is defeated with the direct current acquisition control module and direct current respectively
Go out connecting terminal electrical connection, the single-phase self-coupling pressure regulator 1TC adjust output voltage be 0-250V alternating voltage, it is described
The voltage source for exchanging output wiring terminal output is the alternating voltage of 0-250V, and the voltage source of direct current output connecting terminal output is
The DC voltage of 0-230V, the single-phase rectifier module is by diode 1V1, diode 1V2, diode 1V3 and diode 1V4 groups
At rectifier bridge.
In the present invention, as depicted in figs. 1 and 2, the Regulation Control unit is including further including A.C. contactor 1KM0, electricity
In potential relay 1KV, electric current relay 1KA, limit switch S1, normally closed push button switch 1SB1, normally open push button switch 1SB2, first
Between relay 1K, the second intermediate relay 2K, the first indicator light 1HG, the second indicator light 1HR, third indicator light 1HY and the 4th refer to
Show lamp 2HY；The cathode output end (ends 1a) and cathode output end (ends 2b) of the air switch 1QF is respectively by stating ac contactor
The master control contact 1KM of device 1KM0 is connect with the first input end of the single-phase self-coupling pressure regulator 1TC and the second input terminal, the list
The second input terminal of phase automatic coupling voltage regulator 1TC also adjusts the 6th input terminal, the voltage tune of change-over switch SA with the voltage respectively
One end electrical connection of the 8th input terminal and voltage relay 1KV of change-over switch SA is saved, the anode of the air switch 1QF is defeated
Outlet respectively with one end of normally closed push button switch 1SB1, the second normally-closed contact 1KM-2 of A.C. contactor 1KM0 one end, exchange
In one end of the third normally opened contact 1KM-3 of contactor 1KM0, one end of the normally opened contact 1KA-1 of electric current relay 1KA, first
Between one end of normally opened contact 1K-2 of relay 1K, voltage relay 1KV normally opened contact KV-1 one end and second among after
One end of the normally opened contact 2K-1 of electric appliance 2K is electrically connected, the adjusting output end of the single-phase self-coupling pressure regulator 1TC respectively with electricity
The 8th input terminal that one end of potential relay 1KV, the other end of electric current relay 1KA and voltage adjust change-over switch SA electrically connects
Connect, the voltage adjusts the first input end of change-over switch SA and voltage adjust the 7th input terminal of change-over switch SA respectively with phase
The exchange display device being mutually connected in parallel with exchange output wiring terminal electrical connection, the voltage adjusts the of change-over switch SA
The 5th output end that three input terminals and voltage adjust change-over switch SA acquires control with the direct current respectively by single-phase rectifier module
Molding block and the electrical connection of direct current output connecting terminal；The other end of the normally closed push button switch 1SB1 normally opened is pressed with described respectively
One end of button switch 1SB2 is connected with one end of the first normally opened contact 1KM-1 of A.C. contactor 1KM0, normally open push button switch
The other end of 1SB2 by limit switch S1 respectively with one end of A.C. contactor 1KM0, A.C. contactor 1KM0 it is first normally opened
The other end of contact 1KM-1 connects, the normally-closed contact 1K- that the other end of A.C. contactor 1KM0 passes through the first intermediate relay 1K
1 connect with the cathode output end of the air switch 1QF；The second normally-closed contact 1KM-2's of the A.C. contactor 1KM0 is another
One end is connect by the first indicator light 1HG with the cathode output end of the air switch 1QF, and the third of A.C. contactor 1KM0 is normal
The other end for opening contact 1KM-3 passes through the second indicator light 1HR and the air switch 1QF) cathode output end connect；Electric current after
After the other end of the normally opened contact 1KA-1 of electric appliance 1KA is connect with the other end of the normally opened contact 1K-2 of the first intermediate relay 1K
Connect respectively with one end of one end of the first intermediate relay 1K and third indicator light 1HY, the other end of intermediate relay 1K and
The other end of third indicator light 1HY is connect with the cathode output end of the air switch 1QF, and the normally opened of voltage relay 1KV touches
The normally opened contact 2K-1 of the other end of point 1KV-1 and the second intermediate relay 2K the other end connection after respectively with second among after
One end of electric appliance 2K is connected with one end of the 4th indicator light 2HY, the other end and the 4th indicator light 2HY of the second intermediate relay 2K
The other end connect with the cathode output end of the air switch 1QF.
In the present invention, as depicted in figs. 1 and 2 since single-phase self-coupling pressure regulator 1TC has the handwheel adjusted manually, first will
After the handwheel of single-phase self-coupling pressure regulator 1TC is adjusted to null positions, as the master for being closed air switch QF1 and A.C. contactor 1KM0
When controlling contact 1KM, the first indicator light 1HG is off and the second indicator light 1HR is lit expression and starts to adjust experiment, is invested
Limit switch S1 on handwheel is closed, and at this moment presses normally open push button switch 1SB2, the first normally opened contact of A.C. contactor 1KM0
1KM-1 startups carry out self-locking after being attracted, as slowly turn (adjusting) single-phase self-coupling pressure regulator 1TC, to make secondary generation
Voltage also just slowly rise, at this time the normally opened contact KV-1 of voltage relay 1KV by be attracted connect, the second intermediate relay 2K
Normally opened contact 2K-1 self-locking is attracted, the normally opened contact 1KV-1 of voltage relay 1KV, which is attracted, to be connected, third indicator light
2HY is shinny to indicate corresponding voltage relay contact closure operation, when the electric current exported to single-phase self-coupling pressure regulator 1TC reaches one
It is fixed or when going beyond the scope, the master control contact 1KM dead electricity of contactor 1KM0, the first normally opened contact of A.C. contactor 1KM0 at this time
1KM-1 and third normally opened contact 1KM-3 is disconnected, the first normally opened contact 1KM-2 is closed, the first indicator light 1HG be lit with
And second indicator light 1HR be off expression stop adjust experiment, at the same time, the power supply of single-phase self-coupling pressure regulator 1TC is disconnected,
Cause the secondary leakage current of single-phase self-coupling pressure regulator 1TC necessarily excessive, electric current relay 1KA also follows overcurrent and acts, electricity
Current relay 1KA is attracted, its normally opened contact 1KV-1 is disconnected after voltage relay 1KV dead electricity, and electric current relay 1KA's is normally opened
Contact 1KA-1 is closed, and the normally-closed contact 1K1-1 of the first intermediate relay 1K is closed and the normally opened of the second intermediate relay 2K touches
Point 2K-1 is disconnected rapidly, and third indicator light 1HY is lit at this time, and the 4th indicator light 2HY is off, and indicates to stop adjusting examination
Test, can quickly judge in this way power supply source output voltage condition, can also judge simultaneously ac output end occur short circuit or other
Failure effectively improves the timeliness of deenergization, ensure that greatest extent can to make ac output end be effectively protected
Voltage source is adjusted not to be damaged, and operating process is convenient, the voltage source of output also allows for observing.In the present invention, air is opened
It closes after QF1 is connected on single phase ac alternating current busbar and connects primary input terminal and tune into the single-phase self-coupling pressure regulator 1TC
It presses in control unit, plays the role of the entire leading-out terminal of protection.When adjusting the adjustable side of single-phase self-coupling pressure regulator 1TC, together
When adjust voltage and adjust change-over switch SA, can get corresponding output voltage in the output end for adjusting voltage and adjusting change-over switch SA
Source, the voltage source mode exported when specifically adjusting are as shown in table 1：
Table 1:Change-over switch SA contact energization tables
Table 1 respectively illustrates gear, contact number and the on-state that voltage adjusts change-over switch SA, and "×" indicates to touch
Point is connected, and otherwise to disconnect, in table 1, when voltage, which adjusts change-over switch SA, beats 45 ° to the right, contact 1-2,7-8 are closed,
He opens contact, and voltage adjusts alternating voltage feeding exchange the output wiring terminal X10 and X11 of change-over switch SA outputs at this time
Both ends and the both ends of exchange display device (A.C. voltmeter PV1) are detected the voltage swing of output, and defeated by exchanging
Go out connecting terminal X10 and X11 and provides alternating-current voltage source for external equipment；When beating to 0 °, all contacts are in the open state.When
Voltage adjust change-over switch SA switch position beat to the left 45 ° when, contact 3-4,5-6 are closed, other contacts opening, at this time voltage
The rectified output of two input terminals to the direct current for adjusting the alternating voltage feeding single-phase rectifier module of change-over switch SA outputs acquires
Control module and the electrical connection of direct current output connecting terminal, in the present invention, the direct current acquisition control module includes direct current
Press table PV2 and potentiometer R0, the cathode output end of the single-phase rectifier module respectively with the direct current output connecting terminal just
Pole, D.C. voltmeter PV2 anode connected with one end of potentiometer R0, the cathode of D.C. voltmeter PV2 and the centers potentiometer R0
Adjustable side connects, the other end of the potentiometer R0 and the cathode of the direct current output connecting terminal and bearing for single-phase rectifier module
Pole output end connection passes through constantly regulate potentiometer R0 when adjusting single-phase self-coupling pressure regulator 1TC is fixed on a certain voltage output
Size, to further adjust direct voltage source output size can remove potentiometer R0, directly in practical applications
Between D.C. voltmeter PV2 is connected to two output ends of single-phase rectifier module, it can then be shown in real time using D.C. voltmeter PV2
Show the voltage source size for adjusting output, then DC voltage is provided for external equipment by direct current output connecting terminal X20 and X21
Source.
In the present invention, in conjunction with shown in Fig. 1, Fig. 3 and Fig. 4, as another implementation of the present invention, the direct current acquisition control
Module includes D.C. voltmeter PV2, inductance L1, capacitance C1, capacitance C2, capacitance C3, resistance R2, adjustable resistance R1, two-way controllable
Silicon D1 and diode D2, the D.C. voltmeter PV2, inductance L1, capacitance C1, the cathode output end point of the single-phase rectifier module
It is not connect with the anode of the anode of the D.C. voltmeter PV2, one end of inductance L1, capacitance C1, the other end of the inductance L1
It is connect respectively with the anode of one end of the capacitance C2, the cathode output end of direct current output connecting terminal, silicon-controlled D1, it is silicon-controlled
The cathode of D1 and the cathode output end of the single-phase rectifier module, cathode, the capacitance of the cathode of D.C. voltmeter PV2, capacitance C1
The other end of C2 is connected with the cathode output end of direct current output connecting terminal, the other end and the diode D2 of the adjustable resistance R1
Anode connection, the cathode of the diode D2 connect with one end of the one end resistance R2 and capacitance C3 respectively, the silicon-controlled D1
Control pole connect with the other end of the other end of the resistance R2 and capacitance C3, when single-phase self-coupling pressure regulator 1TC adjusts output
Voltage when carrying out rectification by diode 1V1, diode 1V2, diode 1V3 and the diode 1V4 in single-phase rectifier module,
Contain a large amount of AC and DC ingredient in voltage source signal, the output end of single-phase rectifier module pass through by inductance L1, capacitance C1,
The π type LC filter circuits of capacitance C2 compositions, road generate direct current, and suitable inductance and capacitance can filter out the noise in signal,
And smooth output voltage source signal.After the voltage of single-phase rectifier module output is filtered, voltage is no more than voltage-stabilizing protection
The upper limit, when being not enough to breakdown diode D2, diode D2 does not work, can not give silicon-controlled D1 control pole trigger voltage, it is double
It is not turned on to silicon-controlled D1 is silicon-controlled, then direct current output connecting terminal X20 and X21 provides direct voltage source for external equipment and be in
Safe condition.After the voltage of single-phase rectifier module output is filtered, (such as outside when voltage is more than the upper limit of voltage-stabilizing protection
When there is short circuit in testing equipment), after adjustable resistance R1 current limlitings the size of current limliting (adjustable), breakdown diode D2 and lead
It is logical, after resistance R2 partial pressures and capacitance C3 decompression energy storage, bidirectional triode thyristor D1 work conductings, make the DC voltage of output into
Enter voltage-stabilizing protection state, since stored electric energy of the direct voltage source of output itself will not be fallen by protection circuit loss, leads to
It crosses bidirectional triode thyristor D1 work conductings and has been carried out decompression, when the voltage at the both ends of direct current output connecting terminal X20 and X21 is through electricity
Resistance R1 feeds back to breakdown diode D2 again, and when that cannot trigger bidirectional triode thyristor D1 conductings, bidirectional triode thyristor D1 is closed, so
Cyclic plays the role of pressure limiting and protection, to keep alternating current-direct current pressure test more safe and reliable in the process.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, it can also make several improvements and retouch, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of alternating current-direct current variable voltage source, it is characterised in that：Including AC power interface, current-limiting protection control unit, pressure regulation
Control unit, at least one exchange output unit and at least one DC output unit, the AC power interface pass through limit
Stream protection control unit is connect with the ac input end of the Regulation Control unit, the pressure regulation output end of the Regulation Control unit
It is connect respectively with the exchange output unit and DC output unit, the current-limiting protection control unit includes air switch
(1QF), the Regulation Control unit include that single-phase self-coupling pressure regulator (1TC) and voltage adjust change-over switch (SA), the exchange
Power interface is connect by air switch (1QF) with the input terminal of the single-phase self-coupling pressure regulator (1TC), the single-phase self-coupling tune
The defeated input terminal for adjusting change-over switch (SA) with the voltage respectively of pressure regulation output of depressor (1TC) is connect, and the voltage is adjusted
The output of change-over switch (SA) is connect with exchange output unit and DC output unit respectively, to realize at least one set of alternating current
Potential source and at least one set of direct voltage source export.
2. a kind of alternating current-direct current variable voltage source according to claim 1, it is characterised in that：The exchange output unit includes
The exchange display device being connected in parallel with each other with to exchange output wiring terminal, the DC output unit include single-phase rectifier mould
Block, direct current acquisition control module and direct current output connecting terminal, the air switch (1QF) also pass through Regulation Control unit and electricity
Pressure adjust change-over switch (SA) ac output end respectively with it is described exchange display device and exchange output wiring terminal electrically connect
It connects；The DC output end that the voltage adjusts change-over switch (SA) is connect with the single-phase rectifier module ac input end, described
The DC output end of single-phase rectifier module is electrically connected with the direct current acquisition control module and direct current output connecting terminal respectively.
3. a kind of alternating current-direct current variable voltage source according to claim 2, it is characterised in that：The Regulation Control unit includes
Further include A.C. contactor (1KM0), voltage relay (1KV), electric current relay (1KA), limit switch (S1), normally closed button
Switch (1SB1), normally open push button switch (1SB2), the first intermediate relay (1K), the second intermediate relay (2K), the first instruction
Lamp (1HG), the second indicator light (1HR), third indicator light (1HY) and the 4th indicator light (2HY)；The air switch (1QF)
Cathode output end and cathode output end pass through the master control contact (1KM) for stating A.C. contactor (1KM0) and the single-phase self-coupling respectively
The first input end of pressure regulator (1TC) and the connection of the second input terminal, the second input terminal of the single-phase self-coupling pressure regulator (1TC) is also
Respectively with the voltage adjust change-over switch (SA) the 6th input terminal, voltage adjust change-over switch (SA) the 8th input terminal and
One end of voltage relay (1KV) is electrically connected, the cathode output end of the air switch (1QF) respectively with normally closed push button switch
The one end of (1SB1), one end of the second normally-closed contact (1KM-2) of A.C. contactor (1KM0), A.C. contactor (1KM0)
One end of three normally opened contacts (1KM-3), one end of the normally opened contact (1KA-1) of electric current relay (1KA), the first intermediate relay
One end of the normally opened contact (1K-2) of (1K), the normally opened contact (KV-1) of voltage relay (1KV) and the second intermediate relay
One end of the normally opened contact (2K-1) of (2K) is electrically connected, the adjusting output end of the single-phase self-coupling pressure regulator (1TC) respectively with
One end of voltage relay (1KV), the other end of electric current relay (1KA) and voltage adjust the 8th input of change-over switch (SA)
End electrical connection, the voltage adjusts the first input end of change-over switch (SA) and voltage adjusts the 7th defeated of change-over switch (SA)
Enter end and exchange display device and exchange output wiring terminal electrical connection with what is be connected in parallel with each other respectively, the voltage, which is adjusted, to be turned
5th output end of the third input terminal and voltage adjusting change-over switch (SA) that change switch (SA) is distinguished by single-phase rectifier module
It is electrically connected with the direct current acquisition control module and direct current output connecting terminal；
The other end of the normally closed push button switch (1SB1) connects with one end of the normally open push button switch (1SB2) and exchanging respectively
One end of the first normally opened contact (1KM-1) of tentaculum (1KM0) connects, and the other end of normally open push button switch (1SB2) passes through limit
Switch (S1) respectively with one end of A.C. contactor (1KM0), the first normally opened contact (1KM-1) of A.C. contactor (1KM0)
The other end connects, and the other end of A.C. contactor (1KM0) passes through the normally-closed contact (1K-1) of the first intermediate relay (1K) and institute
State the cathode output end connection of air switch (1QF)；The second normally-closed contact (1KM-2) of the A.C. contactor (1KM0) it is another
One end is connect by the first indicator light (1HG) with the cathode output end of the air switch (1QF), A.C. contactor (1KM0)
The cathode output end that the other end of third normally opened contact (1KM-3) passes through the second indicator light (1HR) and the air switch (1QF)
Connection；The normally opened contact of the other end and the first intermediate relay (1K) of the normally opened contact (1KA-1) of electric current relay (1KA)
Connect respectively with one end of the first intermediate relay (1K) and one end of third indicator light (1HY) after the other end connection of (1K-2)
It connects, the cathode of the other end of intermediate relay (1K) and the other end and the air switch (1QF) of third indicator light (1HY) is defeated
Outlet connects；The other end of the normally opened contact (1KV-1) of voltage relay (1KV) and the normally opened of the second intermediate relay (2K) touch
Connect respectively with one end of the second intermediate relay (1K) and one end of the 4th indicator light (2HY) after the other end connection of point (1K-1)
It connects, the other end of the other end of the second intermediate relay (2K) and the 4th indicator light (2HY) and bearing for the air switch (1QF)
Pole output end connection.
4. a kind of alternating current-direct current variable voltage source according to claim 1 or 3, it is characterised in that：The single-phase self-coupling pressure regulation
Device (1TC) adjusts the alternating voltage that output voltage is 0-250V.
5. a kind of alternating current-direct current variable voltage source according to claim 2 or 3, it is characterised in that：The direct current acquisition control
Module includes D.C. voltmeter (PV2) and potentiometer R0, the cathode output end of the single-phase rectifier module respectively with the direct current
The anode of output wiring terminal, the anode of D.C. voltmeter (PV2) are connected with one end of potentiometer R0, D.C. voltmeter (PV2)
Cathode connect with potentiometer R0 center adjustments end, the other end of the potentiometer R0 and the direct current output connecting terminal it is negative
Pole is connected with the cathode output end of single-phase rectifier module.
6. a kind of alternating current-direct current variable voltage source according to claim 2 or 3, it is characterised in that：The direct current acquisition control
Module includes D.C. voltmeter (PV2), inductance L1, capacitance C1, capacitance C2, capacitance C3, resistance R2, adjustable resistance R1, silicon-controlled
D1 and diode D2, the D.C. voltmeter (PV2), inductance L1, capacitance C1, the cathode output end point of the single-phase rectifier module
It is not connect with the anode of the anode of the D.C. voltmeter (PV2), one end of inductance L1, capacitance C1, the inductance L1's is another
End is connect with the anode of one end of the capacitance C2, the cathode output end of direct current output connecting terminal, silicon-controlled D1 respectively, controllably
The cathode of silicon D1 and the cathode output end of the single-phase rectifier module, the cathode of D.C. voltmeter (PV2), capacitance C1 cathode,
The other end of capacitance C2 is connected with the cathode output end of direct current output connecting terminal, the other end of the adjustable resistance R1 and two poles
The anode of pipe D2 connects, and the cathode of the diode D2 is connect with one end of the one end resistance R2 and capacitance C3 respectively, described controllable
The control pole of silicon D1 is connect with the other end of the other end of the resistance R2 and capacitance C3.
7. a kind of alternating current-direct current variable voltage source according to claim 1, it is characterised in that：The alternating-current voltage source output
Voltage is the alternating voltage of 0-250V, and the voltage of direct voltage source output is the direct current of 0-230V.
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| CN201810536763.6A CN108445953A (en) | 2018-05-30 | 2018-05-30 | A kind of alternating current-direct current variable voltage source |
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| CN201810536763.6A CN108445953A (en) | 2018-05-30 | 2018-05-30 | A kind of alternating current-direct current variable voltage source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109986415A (en) * | 2019-05-06 | 2019-07-09 | 王梅 | A kind of electron ion polissoir and polishing method |
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Effective date of registration: 20230425 Address after: No. 11 Hongsheng Road, Nanning City, Guangxi Zhuang Autonomous Region, 530000 Applicant after: NANNING GAOZHAO ELECTRICAL APPLIANCE CO.,LTD. Applicant after: Yu Jianwen Applicant after: Chen Qian Address before: 530033 No. 11 Hongsheng Road, Nanning City, Guangxi Zhuang Autonomous Region Applicant before: NANNING GAOZHAO ELECTRICAL APPLIANCE CO.,LTD. |
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Application publication date: 20180824 |