CN104600670A - Novel direct-current motor test protector - Google Patents
Novel direct-current motor test protector Download PDFInfo
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- CN104600670A CN104600670A CN201510082925.XA CN201510082925A CN104600670A CN 104600670 A CN104600670 A CN 104600670A CN 201510082925 A CN201510082925 A CN 201510082925A CN 104600670 A CN104600670 A CN 104600670A
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Abstract
The invention relates to a direct-current motor test protector, in particular to a novel direct-current motor test protector and solves the problems such that the existing direct-current motor test protector is low in running reliability, low in response speed, difficult to maintain, high in cost, short in service life and short of speed protection. The novel direct-current motor test protector comprises a protective circuit; the protective circuit comprises a fault relay; one end of the fault relay is grounded, and the other end of the fault relay is connected with a control power source through a control branch; the protector further comprises a first intelligent voltmeter VD1, a second intelligent voltmeter VD2, a first intelligent amperemeter mA1 and a second intelligent amperemeter mA2, and an intelligent speedometer n; the first and second intelligent voltmeter VD1 and VD2 are used for detecting armature winding voltages of two mutual-feed direct-current motors and both have over-limit contacts; the first and second intelligent amperemeter mA1 and mA2 are used for detecting winding currents of the two mutual-feed direct-current motors and both have over-limit contacts; the intelligent speedometer n is used for detecting the speeds of the mutual-feed direct-current motors and has an over-limit contact; the control branch comprises six parallel branches; each parallel branch is composed of the contacts of the meters and a relay.
Description
Technical field
The present invention relates to direct current machine test protective device, be specially New Type of Direct-current Machine test protective device.
Background technology
Modern high power direct current machine is tested general employing and is presented mode mutually, carry out mechanical couplings by two motor-shaft extending ends by coupling and winding is accessed test circuit on request, two motors are made to be in generator and electric motor state respectively by test unit switch and control in circuit, both provide energy mutually, effectively reduce the capacity of testing equipment, reduce power consumption.Possess the features such as speed governing is steady, compact conformation simultaneously, be therefore widely used.Because two motors are in the same circuit, loop current will be made when wherein a motor breaks down sharply change to occur thus affect another motor, cause failure propagation to cause unnecessary loss.Therefore, the setting of direct current machine test protective device just seems extremely important.Once break down, direct current machine test protective device energy fast shut-off place loop current, avoids failure propagation.
Existing direct current machine presents the schematic circuit of experimental rig as shown in Figure 1 mutually: two direct current machine D1, D2 axle stretch end carry out mechanical couplings by coupling, the electrical back to back test circuit that composition direct current machine is conventional, at continuous-current plant XL (circuit machine) and SY(booster) acting in conjunction under, direct current machine D1 runs on electric motor state, and direct current machine D2 runs on Generator Status.The protective device that this existing direct current machine experimental rig adopts comprises the direct current excess flow switch K1 being series at continuous-current plant XL current supply circuit, with the direct current excess flow switch K2 of the direct current machine D2 current supply circuit be series at as generator, and corresponding protective circuit; Described protective circuit comprises power transfer relay GJ, one end ground connection of power transfer relay GJ, the other end is connected with control power supply by controlling brancher, and described controlling brancher is by auxiliary normally opened contact KD, the fault earthing contact GD1-GD3 of direct current excess flow switch K1 or K2 and the normally opened contact GJ1 of power transfer relay GJ is parallel with one another forms; (Chang Kai or normally closed) contact GJ2, GJ3, GJ4 of power transfer relay GJ powers (by controlling Alternating Current Power Supply contactor JC1, JC2) for self break-make (incision or disconnection by respective given potentiometer GDW1, GDW2) and AC controlling continuous-current plant XL and booster SY.Direct current excess flow switch K1, K2 is adopted to protect, when motor occur turn-to-turn short circuit, ring fire, loss of excitation fault and booster, continuous-current plant fault or operate miss time, loop current sharply increases makes direct current excess flow switch K1, K2 action, and cut-off loop electric current plays a protective role; Simultaneously; by the action of the auxiliary contact KD of direct current excess flow switch K1 or K2; power transfer relay GJ is obtained electric; in time by booster SY, the given connecting to neutral of continuous-current plant XL; it is zero (namely self path disconnects) that blockade unit SCR trigger pulse makes it export; make Alternating Current Power Supply contactor JC1, JC2 obtain electric simultaneously, cut off rapidly its AC and power, play a protective role.
Direct current excess flow switch K1, K2 in above-mentioned existing direct current machine test protective device can according to different experiment electric motors adjustment overcurrent values; because direct current excess flow switch mostly is electrical equipment unit's locking device; cannot accurate adjustment to overcurrent value; often there will be overshoot or less stress phenomenon; cause switch to produce misoperation, certain damage is produced to motor.Also have that action response is slow, maintenance difficult, the shortcomings such as cost is high, and useful life is short simultaneously.Simultaneously owing to not having rotating speed to protect; when occur loss of excitation or misoperation cause motor speed uncontrollable sharply increase (being commonly called as driving) time; operating personnel are needed resolutely to process in time; otherwise motor will be caused to occur ring fire; scaling loss commutator face; rotor windings can be made time serious, commutator segment throws away, occur that sweeping thorax phenomenon makes motor scrap.
Summary of the invention
The present invention solves that existing direct current machine test protective device work is unreliable, action response slow, maintenance difficult, cost are high, useful life is short and lack the problems such as rotating speed protection, provides a kind of New Type of Direct-current Machine to test protective device.
The present invention adopts following technical scheme to realize: New Type of Direct-current Machine test protective device, comprises protective circuit, described protective circuit comprises power transfer relay GJ, one end ground connection of power transfer relay GJ, and the other end is connected with control power supply by controlling brancher, also comprise and present armature of direct current motor winding voltage mutually and the first intelligent voltage Table V D1 and the second intelligent voltage Table V D2 with value contact of transfiniting for detecting two respectively, presenting direct current machine Main-pole windings (excitation winding) electric current mutually and the first Intelligent current table mA1 and the second Intelligent current table mA2 with value contact of transfiniting for detecting two respectively, presenting DC motor speeds mutually and the intelligent revolution meter n with value contact of transfiniting for detecting two, described controlling brancher comprises six parallel branches, first parallel branch to be connected in series with the first relay J 1 by the value normally opened contact VH1 that transfinites of the first intelligent voltage Table V D1 and to form and one end ground connection of the first relay J 1, second parallel branch to be connected in series with the second relay J 2 by the value normally opened contact VH2 that transfinites of the second intelligent voltage Table V D2 and to form and one end ground connection of the second relay J 2, 3rd parallel branch to be connected in series with the 3rd relay J 3 by the value normally opened contact AH1 that transfinites of the first Intelligent current table mA1 and to form and one end ground connection of the 3rd relay J 3, 4th parallel branch to be connected in series with the 4th relay J 4 by the value normally opened contact AH2 that transfinites of the second Intelligent current table mA2 and to form and one end ground connection of the 4th relay J 4, 5th parallel branch to be connected in series with the 5th relay J 5 by the value normally opened contact nH that transfinites of intelligent revolution meter n and to form and one end ground connection of the 5th relay J 5, 6th parallel branch is by the first normally opened contact J1-1 of the first relay J 1, first normally opened contact J2-1 of the second relay J 2, first normally opened contact J3-1 of the 3rd relay J 3, first normally opened contact J4-1 of the 4th relay J 4, be in series with the 6th relay J 6 again and one end ground connection of the 6th relay J 6 after first normally opened contact J5-1 of the 5th relay J 5 is parallel with one another, article six, the ungrounded end of each relay (the first to the six relay) in parallel branch is all connected with one end of the first normally opened contact J6-1 of the 6th relay J 6 and forms whole controlling brancher.
New Type of Direct-current Machine of the present invention test protective device does not change the modes such as the control mode of former test circuit and operating process, change working, ground protection.It is by instrument and the ingenious combination of protective circuit, when causing motor test parameter to occur abnormal due to a variety of causes, intelligent instrument (first, two intelligent voltage tables, first, two Intelligent current table and intelligent revolution meter) also can send alarm signal (normally opened contact closes) according to the absolute rating preset by detection display in time, relay J 6 is obtained electric, its normally opened contact closes (i.e. controlling brancher conducting), and then it is electric to make power transfer relay GJ obtain, in time by booster SY, the given connecting to neutral of continuous-current plant XL, blocking its SCR trigger pulse, to make it export be zero, make Alternating Current Power Supply contactor JC1 simultaneously, JC2 dead electricity, its AC of rapid cut-out is powered, play a protective role.Avoid unit to disconnect under full load situation, increase its useful life, reduce in the impact of big current situation to circuit and contactor, this point cannot realize in former protective circuit.
The present invention does not change the mode such as control mode and operating process, change working, ground protection of former test circuit; effectively can setting measurement parameter limit value and with report to the police export intelligent instrument and the ingenious combination of protective circuit; under the prerequisite not affecting motor test function; realize electric moter voltage, electric current, the measurement of rotating speed and limit value protection setting; for experiment electric motor provides overvoltage, overcurrent, the timely power-off protection of hypervelocity; and can malfunction be shown, reduce the damage of experiment electric motor because electrical fault and operate miss cause and test unit.The setting of intelligent instrument limit value is simple, reliable; Reduce the protection frequency of usage of direct current excess flow switch, increase useful life.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of existing direct current machine test protective device;
Fig. 2 is the structure principle chart of New Type of Direct-current Machine of the present invention test protective device;
Fig. 3 is the schematic diagram of protective circuit in the present invention;
Fig. 4 is the schematic diagram of Alternating Current Power Supply contactor control circuit.
Embodiment
New Type of Direct-current Machine test protective device, comprises protective circuit, described protective circuit comprises power transfer relay GJ, one end ground connection of power transfer relay GJ, and the other end is connected with control power supply (24VDC) by controlling brancher, also comprise and present armature of direct current motor winding voltage mutually and the first intelligent voltage Table V D1 and the second intelligent voltage Table V D2 with value contact of transfiniting for detecting two respectively, presenting direct current machine Main-pole windings (excitation winding) electric current mutually and the first Intelligent current table mA1 and the second Intelligent current table mA2 with value contact of transfiniting for detecting two respectively, presenting DC motor speeds mutually and the intelligent revolution meter n with value contact of transfiniting for detecting two, described controlling brancher comprises six parallel branches, first parallel branch to be connected in series with the first relay J 1 by the value normally opened contact VH1 that transfinites of the first intelligent voltage Table V D1 and to form and one end ground connection of the first relay J 1, second parallel branch to be connected in series with the second relay J 2 by the value normally opened contact VH2 that transfinites of the second intelligent voltage Table V D2 and to form and one end ground connection of the second relay J 2, 3rd parallel branch to be connected in series with the 3rd relay J 3 by the value normally opened contact AH1 that transfinites of the first Intelligent current table mA1 and to form and one end ground connection of the 3rd relay J 3, 4th parallel branch to be connected in series with the 4th relay J 4 by the value normally opened contact AH2 that transfinites of the second Intelligent current table mA2 and to form and one end ground connection of the 4th relay J 4, 5th parallel branch to be connected in series with the 5th relay J 5 by the value normally opened contact nH that transfinites of intelligent revolution meter n and to form and one end ground connection of the 5th relay J 5, 6th parallel branch is by the first normally opened contact J1-1 of the first relay J 1, first normally opened contact J2-1 of the second relay J 2, first normally opened contact J3-1 of the 3rd relay J 3, first normally opened contact J4-1 of the 4th relay J 4, be in series with the 6th relay J 6 again and one end ground connection of the 6th relay J 6 after first normally opened contact J5-1 of the 5th relay J 5 is parallel with one another, article six, the ungrounded end of each relay (the first to the six relay) in parallel branch is all connected with one end of the first normally opened contact J6-1 of the 6th relay J 6 and forms whole controlling brancher.
Article six, the ungrounded end of each relay (the first to the six relay) in parallel branch is connected through diode one end with the first normally opened contact J6-1 of the 6th relay J 6, to increase the reliability of work all respectively.
The two ends of the value normally opened contact VH1 that transfinites of the first intelligent voltage Table V D1 in the first parallel branch are parallel with the second normally opened contact J1-2 of the first relay J 1; The two ends of the value normally opened contact VH2 that transfinites of the second intelligent voltage Table V D2 in the second parallel branch are parallel with the second normally opened contact J2-2 of the second relay J 2; The two ends of the value normally opened contact AH1 that transfinites of the first Intelligent current table mA1 in the 3rd parallel branch are parallel with the second normally opened contact J3-2 of the 3rd relay J 3; The two ends of the value normally opened contact AH2 that transfinites of the second Intelligent current table mA2 of the 4th parallel branch are parallel with the second normally opened contact J4-2 of the 4th relay J 4; The two ends of the value normally opened contact nH that transfinites of the intelligent revolution meter n in the 5th parallel branch are parallel with the second normally opened contact J5-2 of the 5th relay J 5; The two ends of the first normally opened contact J1-1-J5-1 of the in the 6th parallel branch first to the 5th relay J 1-J5 are parallel with the second normally opened contact J6-2 of the 6th relay J 6.Auto-lock function is realized with this.
Detailed operation principle of the present invention is as follows:
1) overvoltage protection
When causing motor D 1 armature both end voltage V1 higher than the (setting before test of the first intelligent voltage table upper limit because of a variety of causes; be generally 1.5 times of motor maximum voltage) set point time, the first intelligent voltage table normally opened contact VH1 close, executive circuit J1 coil obtains electric; its normally opened contact J1-1 closes; J6 coil is obtained electric, its normally opened contact J6-1 closes, and executive circuit GJ coil obtains electric; JC1, JC2 dead electricity; open test unit power supply, avoids fault spread, protects experiment electric motor and line facility.
2) overcurrent protection
Motor D 1 is in operation because armature winding turn-to-turn short circuit, misoperation and other reason make main pole electric current A1 higher than the (setting before test of the first intelligent meter upper current limit; be generally 2 times of motor maximum current) set point time; first intelligent voltage table normally opened contact AH1 closes; J3 coil obtains electric; its normally opened contact J3-1 closes, and J6 coil is obtained electric, and its normally opened contact J6-1 closes; executive circuit GJ coil obtains electric, and protection philosophy is the same.
3) stall protection
Suddenly (driving) is exceeded the speed limit because other a variety of causes causes motor; namely rotating speed n is increased beyond intelligent revolution meter rotating speed upper limit set value rapidly; intelligent revolution meter normally opened contact nH closes; coil J5 obtains electric; its normally opened contact J5-1 closes, and J6 coil is obtained electric, and its normally opened contact J6-1 closes; executive circuit GJ coil obtains electric, and protection philosophy is the same.
During concrete enforcement, original protective circuit can determine whether use, retain it here according to actual conditions, and its overcurrent value is adjusted to the maximum of experiment electric motor and equipment permission.Once the exception occurring unknown cause in process of the test, emergency stop button TA can be pressed and make protective circuit action, after investigation reason, restart test unit.
Claims (3)
1. a New Type of Direct-current Machine test protective device, comprises protective circuit, described protective circuit comprises power transfer relay (GJ), one end ground connection of power transfer relay (GJ), and the other end is connected with control power supply by controlling brancher, characterized by further comprising and present armature of direct current motor winding voltage mutually and the first intelligent voltage table (VD1) and the second intelligent voltage table (VD2) with value contact of transfiniting for detecting two respectively, presenting direct current machine Main-pole windings electric current mutually and the first Intelligent current table (mA1) and the second Intelligent current table (mA2) with value contact of transfiniting for detecting two respectively, presenting DC motor speeds mutually and the intelligent revolution meter (n) with value contact of transfiniting for detecting two, described controlling brancher comprises six parallel branches, first parallel branch to be connected in series with the first relay (J1) by the value normally opened contact (VH1) that transfinites of the first intelligent voltage table (VD1) and to form and one end ground connection of the first relay (J1), second parallel branch to be connected in series with the second relay (J2) by the value normally opened contact (VH2) that transfinites of the second intelligent voltage table (VD2) and to form and one end ground connection of the second relay (J2), 3rd parallel branch to be connected in series with the 3rd relay (J3) by the value normally opened contact (AH1) that transfinites of the first Intelligent current table (mA1) and to form and one end ground connection of the 3rd relay (J3), 4th parallel branch to be connected in series with the 4th relay (J4) by the value normally opened contact (AH2) that transfinites of the second Intelligent current table (mA2) and to form and one end ground connection of the 4th relay (J4), 5th parallel branch to be connected in series with the 5th relay (J5) by the value normally opened contact (nH) that transfinites of intelligent revolution meter (n) and to form and one end ground connection of the 5th relay (J5), 6th parallel branch is by first normally opened contact (J1-1) of the first relay (J1), first normally opened contact (J2-1) of the second relay (J2), first normally opened contact (J3-1) of the 3rd relay (J3), first normally opened contact (J4-1) of the 4th relay (J4), be in series with the 6th relay (J6) again and one end ground connection of the 6th relay (J6) after first normally opened contact (J5-1) of the 5th relay (J5) is parallel with one another, article six, the ungrounded end of each relay in parallel branch is all connected with one end of first normally opened contact (J6-1) of the 6th relay (J6) and forms whole controlling brancher.
2. New Type of Direct-current Machine test protective device according to claim 1, it is characterized in that, the ungrounded end of each relay in six articles of parallel branches is connected through diode one end with first normally opened contact (J6-1) of the 6th relay (J6) all respectively.
3. New Type of Direct-current Machine test protective device according to claim 1 and 2; it is characterized in that, the two ends of the value normally opened contact (VH1) that transfinites of the first intelligent voltage table (VD1) in the first parallel branch are parallel with second normally opened contact (J1-2) of the first relay (J1); The two ends of the value normally opened contact (VH2) that transfinites of the second intelligent voltage table (VD2) in the second parallel branch are parallel with second normally opened contact (J2-2) of the second relay (J2); The two ends of the value normally opened contact (AH1) that transfinites of the first Intelligent current table (mA1) in the 3rd parallel branch are parallel with second normally opened contact (J3-2) of the 3rd relay (J3); The two ends of the value normally opened contact (AH2) that transfinites of the second Intelligent current table (mA2) of the 4th parallel branch are parallel with second normally opened contact (J4-2) of the 4th relay (J4); The two ends of the value normally opened contact (nH) that transfinites of the intelligent revolution meter (n) in the 5th parallel branch are parallel with second normally opened contact (J5-2) of the 5th relay (J5); The two ends of first normally opened contact (J1-1-J5-1) of the in the 6th parallel branch first to the 5th relay (J1-J5) are parallel with second normally opened contact (J6-2) of the 6th relay (J6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510082925.XA CN104600670B (en) | 2015-02-16 | 2015-02-16 | Direct current generator tests protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510082925.XA CN104600670B (en) | 2015-02-16 | 2015-02-16 | Direct current generator tests protection device |
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| CN104600670A true CN104600670A (en) | 2015-05-06 |
| CN104600670B CN104600670B (en) | 2017-09-22 |
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| CN201510082925.XA Active CN104600670B (en) | 2015-02-16 | 2015-02-16 | Direct current generator tests protection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418185A (en) * | 2018-05-08 | 2018-08-17 | 常熟纺织机械厂有限公司 | A kind of anti-overflow protective device of high speed injection multi-arm |
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| CN201273935Y (en) * | 2008-09-08 | 2009-07-15 | 中国北车股份有限公司 | DC motor test system |
| CN102313872A (en) * | 2011-08-25 | 2012-01-11 | 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 |
| 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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2015
- 2015-02-16 CN CN201510082925.XA patent/CN104600670B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1467479A1 (en) * | 2003-04-08 | 2004-10-13 | Somfy | Drive device for a closing unit |
| CN201273935Y (en) * | 2008-09-08 | 2009-07-15 | 中国北车股份有限公司 | DC motor test system |
| CN102313872A (en) * | 2011-08-25 | 2012-01-11 | 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418185A (en) * | 2018-05-08 | 2018-08-17 | 常熟纺织机械厂有限公司 | A kind of anti-overflow protective device of high speed injection multi-arm |
| 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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| CN104600670B (en) | 2017-09-22 |
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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. |