CN104600670B - Direct current generator tests protection device - Google Patents
Direct current generator tests protection device Download PDFInfo
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- CN104600670B CN104600670B CN201510082925.XA CN201510082925A CN104600670B CN 104600670 B CN104600670 B CN 104600670B CN 201510082925 A CN201510082925 A CN 201510082925A CN 104600670 B CN104600670 B CN 104600670B
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Abstract
Protection device, specially New Type of Direct-current Machine experiment protection device are tested the present invention relates to direct current generator.Solve the problems such as existing direct current generator experiment protection device work is unreliable, action response is slow, maintenance difficult, cost are high, service life is short and shortage rotating speed is protected.Including protection circuit；Described protection circuit includes power transfer relay, and one end of power transfer relay is grounded, and the other end is connected by controlling brancher with control power supply；Also include being used to detect that two are mutually presented armature of direct current motor winding voltage and with the first intelligent voltage Table V D1 and the second intelligent voltage Table V D2 of value contact of transfiniting respectively, for detecting two mutual feedback direct current generator Main-pole windings electric currents respectively and with the first Intelligent current table mA1 and the second Intelligent current table mA2 of value contact of transfiniting, for detecting that two are mutually presented DC motor speeds and with the intelligent revolution meter n for value contact of transfiniting;Controlling brancher includes six parallel branches；Every parallel branch is made up of the contact and relay of each intelligence instrument.
Description
Technical field
Protection device, specially direct current generator experiment protection device are tested the present invention relates to direct current generator.
Background technology
The experiment of modern high power direct current generator is general using mutually feedback mode, will two motor-shaft extending ends entered by shaft coupling
Winding is simultaneously accessed test circuit by row mechanical couplings on request, makes two motors point with control by test unit conversion in circuit
Other places are in generator and electric motor state, and both mutually provide energy, effectively reduce the capacity of testing equipment, and reduction electric energy disappears
Consumption.The features such as being provided simultaneously with steady speed governing, compact conformation, therefore be widely used.Because two motors are in the same circuit,
Loop current will be made to occur drastically change when wherein one motor breaks down and, so as to influence another motor, cause failure
Expansion causes unnecessary loss.Therefore, the setting of direct current generator experiment protection device just seems extremely important.Once generation event
Barrier, loop current where direct current generator experiment protection device energy fast shut-off, it is to avoid failure propagation.
The schematic circuit that existing direct current generator mutually presents experimental rig is as shown in Figure 1：Two direct current generator D1, D2 axle stretch ends
Mechanical couplings, the conventional electrical back to back test circuit of composition direct current generator, in continuous-current plant XL (circuits are carried out by shaft coupling
Machine）And SY（Booster）Collective effect under, direct current generator D1 runs on electric motor state, and direct current generator D2 runs on generator
State.The protection device that the existing direct current generator experimental rig is used includes being series at the straight of continuous-current plant XL current supply circuits
Excess flow switch K2 is flowed, and is series at the direct current excess flow switch K1 of the direct current generator D2 current supply circuits as generator, and accordingly
Protection circuit；Described protection circuit includes power transfer relay GJ, and power transfer relay GJ one end is grounded, and the other end passes through control
Branch road processed is connected with control power supply, auxiliary normally opened contact KD by direct current excess flow switch K1 or K2 of described controlling brancher, failure
Earthing contact GD1-GD3 and power transfer relay GJ normally opened contact GJ1 is parallel with one another to be formed；Power transfer relay GJ's（It is normally opened
Or it is normally closed）Contact GJ2, GJ3, GJ4 are used for itself break-make for controlling continuous-current plant XL and booster SY（By each giving
Potentiometer GDW1, GDW2 incision or disconnection）And AC is powered（By controlling Alternating Current Power Supply contactor JC1, JC2）.Using
Direct current excess flow switch K1, K2 are protected, when turn-to-turn short circuit, ring fire, loss of excitation failure and booster, dc source occurs in motor
When plant failure or operational error, loop current, which increased dramatically, acts direct current excess flow switch K1, K2, and cut-off loop electric current is played
Protective effect；Meanwhile, by direct current excess flow switch K1 or K2 auxiliary contact KD action, power transfer relay GJ is obtained electric, and
When by booster SY, continuous-current plant XL give connecting to neutral, block unit SCR trigger pulse it is output as zero（I.e. itself
Path disconnects）, while making Alternating Current Power Supply contactor JC1, JC2 obtain electric, its AC is cut off rapidly and is powered, is played a protective role.
Direct current excess flow switch K1, K2 in above-mentioned existing direct current generator experiment protection device can be according to different experiment electricity
Machine adjusts overcurrent value, and because direct current excess flow switch is generally dynamo-electric combination unit, overcurrent value can not accurately be adjusted, often occurred super
Adjust or less stress phenomenon, cause switch to produce misoperation, certain damage is produced to motor.While also existing, action response is slow, tie up
Difficulty is repaiied, cost is high, the shortcomings of service life is short.Simultaneously because without rotating speed protection, when there is loss of excitation or maloperation causes electricity
Machine rotating speed is uncontrollable to be sharply increased（It is commonly called as driving）When, need operating personnel resolutely to handle in time, otherwise will cause motor
There is ring fire, scaling loss commutator face can throw away rotor windings, commutator segment when serious, occurring sweeping thorax phenomenon scraps motor.
The content of the invention
The existing direct current generator experiment protection device work of present invention solution is unreliable, action response is slow, maintenance difficult, cost
High, service life is short and lacks the problems such as rotating speed is protected and tests protection device there is provided a kind of direct current generator.
The present invention adopts the following technical scheme that realization：Direct current generator tests protection device, including protection circuit；It is described
Protection circuit include power transfer relay GJ, power transfer relay GJ one end is grounded, and the other end passes through controlling brancher and control electricity
Source is connected；Also include being used to detect that two are mutually presented armature of direct current motor winding voltage and with the first intelligence of value contact of transfiniting respectively
Energy voltmeter VD1 and the second intelligent voltage Table V D2, for detecting two mutually feedback direct current generator Main-pole windings respectively（Exciting Windings for Transverse Differential Protection）
Electric current and the first Intelligent current table mA1 and the second Intelligent current table mA2 with value contact of transfiniting, for detecting that two are mutually presented straight
Stream motor speed and the intelligent revolution meter n with value contact of transfiniting;Described controlling brancher includes six parallel branches；First simultaneously
The first intelligent voltage Table V D1 of the connection branch route value normally opened contact VH1 that transfinites is concatenated with the first relay J1 to be formed and the first relay
Device J1 one end ground connection；Second parallel branch by the second intelligent voltage Table V D2 transfinite value normally opened contact VH2 and the second relay
J2 concatenations are formed and the second relay J2 one end is grounded；3rd parallel branch transfinites value often by the first Intelligent current table mA1's
Open contact A H1 concatenated with the 3rd relay J3 form and the 3rd relay J3 one end ground connection；4th parallel branch is by the second intelligence
Can the ammeter mA2 value normally opened contact AH2 that transfinites concatenate and form and the 4th relay J4 one end is grounded with the 4th relay J4；
5th parallel branch is concatenated with the 5th relay J5 by the intelligent revolution meter n value normally opened contact nH that transfinites and formed and the 5th relay
J5 one end ground connection；6th parallel branch by the first relay J1 the first normally opened contact J1-1, the second relay J2 first
Normally opened contact J2-1, the 3rd relay J3 the first normally opened contact J3-1, the 4th relay J4 the first normally opened contact J4-1,
It is in series and the 6th relay with the 6th relay J6 again after 5th relay J5 the first normally opened contact J5-1 is parallel with one another
Each relay in J6 one end ground connection, six parallel branches（First to the 6th relay）Ungrounded end all with the 6th relay
Device J6 the first normally opened contact J6-1 one end is connected and constitutes whole controlling brancher.
Direct current generator experiment protection device of the present invention does not change the control mode of former test circuit and operated
The modes such as journey, change working, ground protection.It is by instrument and the ingenious combination of protection circuit, when causing motor due to a variety of causes
When test parameters occurs abnormal, intelligence instrument（First and second intelligent voltage table, first and second Intelligent current table and intelligent revolution meter）
It can in time detect and show and alarm signal is sent according to absolute rating set in advance（Normally opened contact is closed）, make relay J6
Obtain electric, its normally opened contact closure（I.e. controlling brancher is turned on）, and then power transfer relay GJ is obtained electric, in time by booster SY, straight
Flow supply unit XL and give connecting to neutral, blocking its SCR trigger pulse makes it be output as zero, while making Alternating Current Power Supply contactor
JC1, JC2 dead electricity, cut off rapidly its AC and power, play a protective role.Avoid unit from being disconnected under full load situation, increase
Its service life, reduces the impact in high current situation to circuit and contactor, and this point can not be realized in former protection circuit.
The present invention does not change the modes such as the control mode and operating process, change working, ground protection of former test circuit,
Effectively by can setting measurement parameter limit value and intelligence instrument and the ingenious combination of protection circuit with warning output, do not influenceing
On the premise of motor test function, electric moter voltage, electric current, the measurement of rotating speed and limit value protection setting are realized, is that experiment electric motor is carried
For overvoltage, excessively stream, exceed the speed limit timely power-off protection, and can show malfunction, reduces because electrical fault and operational error are triggered
Experiment electric motor and test unit damage.The setting of intelligence instrument limit value is simple, reliable；Reduce the protection of direct current excess flow switch
Frequency of usage, increases service life.
Brief description of the drawings
Fig. 1 is the structure principle chart that existing direct current generator tests protection device；
Fig. 2 is the structure principle chart that direct current generator of the present invention tests protection device；
Fig. 3 is the schematic diagram of protection circuit in the present invention；
Fig. 4 is the schematic diagram of Alternating Current Power Supply contactor control circuit.
Embodiment
Direct current generator tests protection device, including protection circuit；Described protection circuit includes power transfer relay GJ, failure
Relay GJ one end ground connection, the other end passes through controlling brancher and control power supply（24VDC）It is connected；Also include being used to detect respectively
Two are mutually presented armature of direct current motor winding voltage and with the first intelligent voltage Table V D1 and the second intelligent voltage of value contact of transfiniting
Table V D2, for detecting two mutually feedback direct current generator Main-pole windings respectively（Exciting Windings for Transverse Differential Protection）Electric current and with the of value contact of transfiniting
One Intelligent current table mA1 and the second Intelligent current table mA2, for detecting that two are mutually presented DC motor speed and tactile with the value that transfinites
The intelligent revolution meter n of point;Described controlling brancher includes six parallel branches；First parallel branch is by the first intelligent voltage table
The VD1 value normally opened contact VH1 that transfinites concatenated with the first relay J1 form and the first relay J1 one end ground connection；Second is in parallel
The second intelligent voltage Table V D2 of the branch route value normally opened contact VH2 that transfinites is concatenated with the second relay J2 to be formed and the second relay
J2 one end ground connection；3rd parallel branch by the first Intelligent current table mA1 the value normally opened contact AH1 and the 3rd relay J3 that transfinites
Concatenation is formed and the 3rd relay J3 one end is grounded；4th parallel branch is normally opened by the second Intelligent current table mA2 value that transfinites
Contact A H2 concatenated with the 4th relay J4 form and the 4th relay J4 one end ground connection；5th parallel branch is by intelligent rotating speed
The table n value normally opened contact nH that transfinites concatenated with the 5th relay J5 form and the 5th relay J5 one end ground connection；6th is in parallel
Branch route the first relay J1 the first normally opened contact J1-1, the second relay J2 the first normally opened contact J2-1, the 3rd relay
Device J3 the first normally opened contact J3-1, the 4th relay J4 the first normally opened contact J4-1, the 5th relay J5 it is first normally opened
It is in series again with the 6th relay J6 after contact J5-1 is parallel with one another and the 6th relay J6 one end is grounded, six branch in parallel
Each relay in road（First to the 6th relay）First normally opened contact J6-1 of the ungrounded end all with the 6th relay J6
One end be connected and constitute whole controlling brancher.
Each relay in six parallel branches（First to the 6th relay）Ungrounded end all respectively through diode with
6th relay J6 the first normally opened contact J6-1 one end is connected, to increase the reliability of work.
The value normally opened contact VH1 that transfinites of the first intelligent voltage Table V D1 in first parallel branch two ends are parallel with first
Relay J1 the second normally opened contact J1-2;The value normally opened contact that transfinites of the second intelligent voltage Table V D2 in second parallel branch
VH2 two ends are parallel with the second relay J2 the second normally opened contact J2-2;The first Intelligent current table in 3rd parallel branch
The mA1 value normally opened contact AH1 that transfinites two ends are parallel with the 3rd relay J3 the second normally opened contact J3-2;4th parallel branch
The the second Intelligent current table mA2 value normally opened contact AH2 that transfinites two ends be parallel with the 4th relay J4 the second normally opened contact
J4-2;The value normally opened contact nH that transfinites of intelligent revolution meter n in 5th parallel branch two ends are parallel with the 5th relay J5's
Second normally opened contact J5-2;The first normally opened contact J1-1-J5-1 of the first to the 5th relay J1-J5 in 6th parallel branch
Two ends be parallel with the 6th relay J6 the second normally opened contact J6-2.Auto-lock function is realized with this.
Detailed operation principle of the present invention is as follows：
1）Overvoltage protection
When motor D1 armature both end voltages V1 is higher than the first intelligent voltage table upper limit caused by a variety of causes（Set before experiment
Determine, generally the 1.5 of motor maximum voltage times）During setting value, the first intelligent voltage table normally opened contact VH1 closures, execution circuit
J1 coils obtain electric, its normally opened contact J1-1 closures, J6 coils is obtained electric, its normally opened contact J6-1 closures, execution circuit GJ lines
Enclose electric, JC1, JC2 dead electricity, open test unit power supply, it is to avoid fault spread, protect experiment electric motor and line facility.
2）Overcurrent protection
Motor D1 is in operation because armature winding turn-to-turn short circuit, maloperation and other reasons make main pole electric current A1 higher than the
One intelligent meter upper current limit（Set before experiment, generally the 2 of motor maximum current times）During setting value, the first intelligent voltage table is normal
Contact A H1 closures are opened, J3 coils obtain electric, its normally opened contact J3-1 closures make J6 coils obtain electric, its normally opened contact J6-1 is closed
Close, execution circuit GJ coils obtain electric, and protection philosophy is ibid.
3）Stall protection
Motor exceeds the speed limit suddenly caused by other a variety of causes（Driving）, i.e. rotating speed n be rapidly increased beyond intelligent revolution meter turn
Fast upper limit set value, intelligent revolution meter normally opened contact nH closures, coil J5 obtains electric, its normally opened contact J5-1 closures, makes J6 coils
Obtain electric, its normally opened contact J6-1 closures, execution circuit GJ coils obtain electric, and protection philosophy is ibid.
When it is implemented, original protection circuit can decide whether to use according to actual conditions, it is retained here,
And its overcurrent value is adjusted to the maximum that experiment electric motor and equipment allow.Once there is the different of unknown cause in process of the test
Chang Shi, can press emergency stop button TA acts protection circuit, and test unit is restarted after reason is investigated and prosecuted.
Claims (3)
1. a kind of direct current generator tests protection device, including protection circuit；Described protection circuit includes power transfer relay（GJ）,
Power transfer relay（GJ）One end ground connection, the other end by controlling brancher with control power supply be connected；Characterized by further comprising with
Armature of direct current motor winding voltages are mutually presented in detection two respectively and with the first intelligent voltage tables of value contact of transfiniting（VD1）With
Second intelligent voltage table（VD2）, for detecting that two are mutually presented direct current generator Main-pole windings electric current and with value contact of transfiniting respectively
The first Intelligent current table（mA1）With the second Intelligent current table（mA2）, for detecting two mutual feedback DC motor speeds and having
The intelligent revolution meter of the value that transfinites contact（n）;Described controlling brancher includes six parallel branches；First parallel branch is by the first intelligence
Can voltmeter（VD1）The value normally opened contact that transfinites（VH1）With the first relay（J1）Concatenation is formed and the first relay（J1）'s
One end is grounded；Second parallel branch is by the second intelligent voltage table（VD2）The value normally opened contact that transfinites（VH2）With the second relay
（J2）Concatenation is formed and the second relay（J2）One end ground connection；3rd parallel branch is by the first Intelligent current table（mA1）It is super
Limit value normally opened contact（AH1）With the 3rd relay（J3）Concatenation is formed and the 3rd relay（J3）One end ground connection；4th is in parallel
Branch route the second Intelligent current table（mA2）The value normally opened contact that transfinites（AH2）With the 4th relay（J4）Concatenation is formed and the 4th
Relay（J4）One end ground connection；5th parallel branch is by intelligent revolution meter（n）The value normally opened contact that transfinites（nH）With the 5th after
Electrical equipment（J5）Concatenation is formed and the 5th relay（J5）One end ground connection；6th parallel branch is by the first relay（J1）First
Normally opened contact（J1-1）, the second relay（J2）The first normally opened contact（J2-1）, the 3rd relay（J3）First it is normally opened touch
Point（J3-1）, the 4th relay（J4）The first normally opened contact（J4-1）, the 5th relay（J5）The first normally opened contact（J5-
1）After parallel with one another again with the 6th relay（J6）It is in series and the 6th relay（J6）One end ground connection, six parallel branches
In each relay ungrounded end all with the 6th relay（J6）The first normally opened contact（J6-1）One end be connected and constitute
Whole controlling brancher.
2. direct current generator according to claim 1 tests protection device, it is characterised in that in six parallel branches it is each after
The ungrounded end of electrical equipment is all respectively through diode and the 6th relay（J6）The first normally opened contact（J6-1）One end be connected.
3. direct current generator according to claim 1 or 2 tests protection device, it is characterised in that in the first parallel branch
First intelligent voltage table（VD1）The value normally opened contact that transfinites（VH1）Two ends be parallel with the first relay（J1）It is second normally opened
Contact（J1-2）;The second intelligent voltage table in second parallel branch（VD2）The value normally opened contact that transfinites（VH2）Two ends it is in parallel
There is the second relay（J2）The second normally opened contact（J2-2）;The first Intelligent current table in 3rd parallel branch（mA1）It is super
Limit value normally opened contact（AH1）Two ends be parallel with the 3rd relay（J3）The second normally opened contact（J3-2）;4th parallel branch
The second Intelligent current table（mA2）The value normally opened contact that transfinites（AH2）Two ends be parallel with the 4th relay（J4）It is second normal
Open contact（J4-2）;Intelligent revolution meter in 5th parallel branch（n）The value normally opened contact that transfinites（nH）Two ends be parallel with
Five relays（J5）The second normally opened contact（J5-2）;The first to the 5th relay in 6th parallel branch（J1-J5）
One normally opened contact（J1-1 — J5-1）Two ends be parallel with the 6th relay（J6）The second normally opened contact（J6-2）.
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| CN201510082925.XA CN104600670B (en) | 2015-02-16 | 2015-02-16 | Direct current generator tests protection device |
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| CN201510082925.XA CN104600670B (en) | 2015-02-16 | 2015-02-16 | Direct current generator tests protection device |
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| CN104600670A CN104600670A (en) | 2015-05-06 |
| CN104600670B true CN104600670B (en) | 2017-09-22 |
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| CN108418185B (en) * | 2018-05-08 | 2023-11-24 | 常熟纺织机械厂有限公司 | Overcurrent protection device for high-speed injection multi-arm |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204376390U (en) * | 2015-02-16 | 2015-06-03 | 永济新时速电机电器有限责任公司 | New Type of Direct-current Machine test protective device |
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| FR2853687B1 (en) * | 2003-04-08 | 2007-03-30 | Somfy Sas | DEVICE FOR DRIVING A CLOSURE ELEMENT |
| CN201273935Y (en) * | 2008-09-08 | 2009-07-15 | 中国北车股份有限公司 | DC motor test system |
| CN102313872B (en) * | 2011-08-25 | 2014-10-15 | 湘潭电机股份有限公司 | Energy-saving direct current motor test system |
| CN103825512A (en) * | 2012-11-16 | 2014-05-28 | 大连世创恒泰科技有限公司 | Control system of DC motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204376390U (en) * | 2015-02-16 | 2015-06-03 | 永济新时速电机电器有限责任公司 | New Type of Direct-current Machine test protective device |
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Address after: 044500 Yongji City, Shanxi Province, the city of motor street, No. 18, No. Patentee after: CRRC YONGJI ELECTRIC CO., LTD. Address before: 044500 Yongji City, Shanxi Province, the city of motor street, No. 18, No. Patentee before: Yongji Xinshisu Motor Electrical Appliance Co., Ltd. |
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