CN2086948U - Starting compensation control cabinet for low-voltage energy-saving cage motor - Google Patents
Starting compensation control cabinet for low-voltage energy-saving cage motor Download PDFInfo
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- CN2086948U CN2086948U CN 90217281 CN90217281U CN2086948U CN 2086948 U CN2086948 U CN 2086948U CN 90217281 CN90217281 CN 90217281 CN 90217281 U CN90217281 U CN 90217281U CN 2086948 U CN2086948 U CN 2086948U
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- Prior art keywords
- motor
- relay
- line
- normally closed
- contactor
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Abstract
The utility model relates to a starting and controller for low-voltage cage motor which contains a cabinet body, a control panel, a main circuit and a controlling circuit. The impact of the starting current to the electric network is limited by the starting and electricity-saving compensator in the main circuit. A starting button is pressed, two alternating current contactors in the controlling circuit are closed, the motor is started, an intermediate relay is communicated by a time delay relay delayed, one of the alternating current contactors is disconnected, so the motor runs normally. An overcurrent relay, a thermal relay and a voltage-sensitive resistor in the main circuit have the protecting functions of overcurrent, overheat and overvoltage. The utility model has many functions, the starting current is small, since the motor is connected with the compensator in parallel, the power factor closes to 1, so the energy is saved and the service life of the motor is prolonged.
Description
The utility model relates to electric motor starting and the control device in a kind of electric drive.
At present, the squirrel cage motor startup adopts direct startup of magnetic starter or the startup of autocoupling type reducing transformer to control mostly.
No matter be magnetic starter or autocoupling type reducing transformer, its structure includes cabinet, control flow, main circuit and control circuit four parts.Main circuit is introduced the 380V three phase mains and supply control circuit, by its deactivation motor.
Under net capacity permission situation, adopt magnetic starter directly to start.Under the situation of large-size machine or net capacity deficiency, utilize the autocoupling type reducing transformer that 65% supply voltage is added to the motor input earlier and carry out reduced-voltage starting, in order to reduce starting current, to reduce influence to electrical network, treat that motor rotation connects 100% voltage after normal again, makes the motor operate as normal.Yet there are following shortcoming in this magnetic starter or autocoupling type reducing transformer:
When 1, directly starting, starting current is big, when reduced-voltage starting then exists the secondary reclosing to the impact of electrical network;
2, because magnetic starter or autocoupling type reducing transformer do not possess power factor compensation device, so reactive loss is big, when especially power transmission sequence was long, line loss was more obvious;
3, staring torque is little, and start-up time is long, is unsuitable for band and carries startup;
4, defencive function is incomplete.
The purpose of this utility model provides that a kind of function is many, and starting current is little, and the low pressure squirrel cage motor of low energy consumption starts compensate control apparatus.
For this reason, the utility model is taked following structure: it is made up of cabinet, control flow, main circuit and control circuit.Wherein main circuit comprises economize on electricity compensator 1C, starting compensator 2C, overcurrent relay GLJ, thermal relay RJ, two current transformer 1LH, 2LH, three piezo-resistance Ym
1, Ym
2, Ym
3, automatic switch ZK, two A.C. contactor 1JC, 2JC main contacts and ammeter A, its connection situation is: the three-phase of 380V power supply meets automatic switch ZK corresponding three terminals X suitable for reading respectively
1, X
2, X
3, ZK end opening three-phase terminal is respectively X
11, X
12, X
13, X wherein
11, X
13Meet A.C. contactor 1JC main contacts both sides contact suitable for reading, X by current transformer 1LH, 2LH respectively
12Then directly connect its main contacts intermediate contact suitable for reading, behind 1HL, the 2LH end short circuit separately, link through the end of ammeter A and overcurrent relay GLJ, and 1LH, 2LH and the equal ground connection of the GLJ other end, three contact X of 1JC main contacts end opening
21, X
22, X
23Connect thermal relay RJ three contacts suitable for reading respectively, three contact X of RJ end opening
31, X
32, X
33Meet three contact D of motor D respectively
1, D
2, D
3Above-mentioned three terminals of economize on electricity compensator 1C meet three contact D of motor D respectively
1, D
2, D
3Three terminals of starting compensator 2C connect A.C. contactor 2JC main contacts three terminals suitable for reading respectively, and three terminals of 2JC main contacts end opening meet three contact D of motor D respectively
1, D
2, D
3Piezo-resistance Ym
1Be connected on D
1With D
2Between, Ym
2Be connected on D
2With D
3Between, Ym
3Be connected on D
1With D
3Between.Above-mentioned control circuit is made up of three time relay 1SJ, 2SJ, 3SJ, three auxiliary relay 1ZJ, 2ZJ, 3ZJ, two A.C. contactor 1JC, 2JC, start button QA, stop button TA and switch LK.The connection situation of each parts of control circuit is like this: an end of the normally closed point of A.C. contactor 1JC connects an end of time relay 3SJ line bag on the one hand, connect an end of 2ZJ line bag on the one hand through 3SJ time-delay cut-off point, another termination stop button of the normally closed point of 1JC TA one end, often battle, one end all connect the same end of stop button TA for normally closed point one end, auxiliary relay 3ZJ and time relay 2SJ delays time.Delay time normally closed point, 3ZJ of 2SJ often made war and met 3ZJ line Bao Yiduan behind the other end short circuit.The normal two ends of making war of overcurrent relay GLJ connect an end of TA one end and 2SJ line bag respectively, and 2SJ, 3SJ, 2ZJ, the 3ZJ line bag other end all meet phase line X in the main circuit through fuse RD
13Start button QA two ends and the A.C. contactor 1JC two ends of often making war are in parallel, its end in parallel meets TA through the normally closed point of 2ZJ, its other end in parallel links with 1JC, the 1SJ line bag other end on the one hand, on the one hand also put an end with 1SJ timing closing, often a make war end, normally closed point one end and switch LK one end of 1ZJ connects.The 1SJ timing closing point other end and 1ZJ are often made war and are connect an end of 1ZJ line bag behind the other end short circuit, connect an end of 2JC line bag behind normally closed some other end of 1ZJ and the LK other end short circuit.The 1JC line bag other end links with the normal end of making war of 3ZJ behind the normally closed point of RJ and 1SJ, 1ZJ, 2JC line bag other end short circuit, and the 3ZJ other end of often making war meets major loop phase line X through fuse RD
11
The economize on electricity compensator 1C of main circuit is by three building-out capacitor C
1, C
2, C
3, three discharge resistance R
1, R
2, R
3, two pressure protector P
1, P
2Form.Three discharge capacity C wherein
1, C
2, C
3Be that triangle connects, triangle wherein two ends respectively through a corresponding pressure protector P
1, P
2Corresponding phase line D with motor D
1, D
3Link, triangle the 3rd end directly meets D phase line D
2, in addition, C
1, C
2, C
3Corresponding discharge resistance R respectively in parallel
1, R
2, R
3Starting compensator 2C comprises three building-out capacitor C
4, C
5, C
6, three discharge resistance R
4, R
5, R
6, two pressure protector P
3, P
4C
4, C
5, C
6Be that triangle connects, triangle wherein two ends respectively through a corresponding pressure protector P
3, P
4Link with A.C. contactor 2JC main contacts two side joints point suitable for reading, the 3rd end directly connects 2JC main contacts intermediate contact suitable for reading.In addition, three building-out capacitor C
4, C
5, C
6Corresponding discharge resistance R respectively in parallel
4, R
5, R
6
Automatic switch ZK in the closed main circuit connects the 380V three phase mains, and green indicating lamp LD is bright.Press start button QA, A.C. contactor 1JC coil is owing to 1JC self-locking contact closure, the adhesive of 1JC coil.A.C. contactor 2JC coil is through normally closed some adhesive of auxiliary relay 1ZJ, and red eye 1HD, 2HD are bright, and motor D starts.Through time relay 1SJ time-delay, connect auxiliary relay 1ZJ coil by its timing closing point, disconnect A.C. contactor 2JC by the normally closed point of 1ZJ again, red eye 2HD goes out.Motor D is in normal operation, if the motor D power factor reduces, adjusts switch LK, the 2JC Reclosable.
Press stop button TA, A.C. contactor 1JC, 2JC outage, motor D is out of service.
Time relay 3SJ coil through the normally closed point of A.C. contactor 1JC electric after delay protection, disconnect auxiliary relay 2ZJ, amber lamp UD goes out, and is in to recover to prepare starting state.
When 10～55KW motor D started, starting compensator 2C that works simultaneously with motor D and economize on electricity compensator 1C had limited starting current and greatly to the impact of electrical network.Through 3 seconds, after motor D ran well, the starting compensator 2C that breaks relied on economize on electricity compensator 1C then, and motor power factor is mended near 1.
Starting less than the 10KW motor D, is that motor D is dropped into electrical network with economize on electricity compensator 1C.
37KW～260KW electric motor starting is to adopt Y-△ conversion earlier, and motor D is normally started, and envoy's electronic compensating device 1C devotes oneself to work then, relies on economize on electricity compensator 2C that the motor D power factor is mended near 1.
Automatic switch ZK plays the short-circuit protection effect to main circuit, and the short-circuit protection of control circuit is then finished by fuse RD.
Current transformer 1LH, 2LH secondary and overcurrent relay GLJ coil link, and when electric current was excessive, its junction closure time relay 2SJ coil after time-delay, was connected auxiliary relay 3ZJ, and its normally closed some open-circuit line is so play overcurrent protection to motor D.
The overtemperature protection principle is: disconnect A.C. contactor 1JC coil power, motor D stall by thermal relay RJ contact.
Overvoltage protection is then by piezo-resistance Ym
1, Ym
2, Ym
3Finish.
Have the discharge circuit that three discharge resistances are formed in economize on electricity compensator 1C and the starting compensator 2C, when temperature raise, 1C and 2C internal pressure increased, and automatically protected by the pressure protector in it this moment.
From the above mentioned, the utility model function is many, has short-circuit protection, and promptly when motor fault current during greater than 8 times of rated current, can cut off the electricity supply automatically for 1 second; Overvoltage protection, motor surge voltage occurs in starting or carrying out, its value surpasses 800V, and protective device moves immediately, prevents that the overvoltage phenomenon from appearring in motor; Overload protection in the time of can guaranteeing motor operating overload 120%, was cut off the electricity supply in one minute automatically; Overtemperature protection.
Also has following advantage: limiting starting current, minimizing is to electric network influencing, 10KV and the loss of 0.4KV high-low pressure power supply network are reduced, particularly many to petroleum industry and drainage and irrigation equipment power supply network, circuit is long, and area is wide, the situation that load is seasonal strong, use this device to disperse local compensation, economic benefit is more obvious; The direct parallel connection of this device compensator and motor can improve motor terminal voltage, reduces current of electric, prolongs its useful life, makes power factor be in optimum value always; Can invest by stages, in batches and install, alleviate burden for users.
Fig. 1 is the utility model profile schematic diagram.
1, cabinet; 2, control flow
Fig. 2 is the internal structure schematic diagram.
Fig. 3 is the circuit theory diagrams of main circuit.
Fig. 4 is the circuit theory diagrams of control circuit.
1SJ, 2SJ, 3SJ model all adopt JS7-A, 380V; 1ZJ, 2ZJ, 3ZJ all adopt JZ7-44,380V; 1JC, 2JC are respectively CJ10-100, CJ10-60; RJ is JR16-63A/3D; RD is RL
1-15/15, melt 15A, 2; GLJ is DL-11/3-6; 1LH, 2LH all adopt LMZ-0.5-100/5; Ym
1, Ym
2, Ym
3All adopt MY-31,800V, the sheet type; Terminal board I adopts JX10/10,15 retainings, 1; C
1～C
6All adopt 5～500 μ F, R
1～R
6All adopt 5～50 Ω.
Two-phase X at the 380V power supply
11With X
13Between insert a greensignal light LD, two red eye 1HD, 2HD, an amber lamp UD.
LD, 1HD, 2HD and UD all adopt XD-7/380V.
Claims (4)
1, a kind of low pressure squirrel cage motor control cubicle, form by cabinet, control flow, main circuit and control circuit, this energy-conservation low pressure squirrel cage motor starts the compensation control cubicle and is characterised in that, described main circuit comprises economize on electricity compensator 1C, starting compensator 2C, overcurrent relay GLJ thermal relay RJ, two current transformer 1LH, 2LH, three piezo-resistance Ym
1, Ym
2, Ym
3, automatic switch ZK, two A.C. contactor 1JC, 2JC main contacts and ammeter A, 380V power supply three-phase meets automatic switch ZK respective three-phase terminals X suitable for reading respectively
1, X
2, X
3, the end opening three-phase terminal is respectively X
11, X
12, X
13, X wherein
11, X
13Meet A.C. contactor 1JC main contacts both sides contact suitable for reading, X by current transformer 1LH, 2LH respectively
12Then directly connect its main contacts intermediate contact suitable for reading, behind 1LH, the 2LH end short circuit separately, link through the end of ammeter A and overcurrent relay GLJ, and 1LH, 2LH and the equal ground connection of the GLJ other end, three contact X of 1JC main contacts end opening
21, X
22, X
23Connect thermal relay RJ three contacts suitable for reading respectively, three contact X of RJ end opening
31, X
32, X
33Meet three contact D of motor D respectively
1, D
2, D
3, three terminals of described energy-conservation compensator 1C meet three contact D of motor D respectively
1, D
2, D
3, three terminals of starting compensator 2C connect A.C. contactor 2JC main contacts three terminals suitable for reading respectively, and three terminals of 2JC main contacts end opening meet three contact D of motor D respectively
1, D
2, D
3, piezo-resistance Ym
1Be connected on D
1With D
2Between, Ym
2Be connected on D
2With D
3Between, Ym
3Be connected on D
1With D
3Between, described control circuit hinders Ym by three time relay 1SJ, 2SJ, 3SJ, three auxiliary relay 1ZJ, 2ZJ, 3ZJ, two A.C. contactors
1Be connected on D
1With D
2Between, Ym
2Be connected on D
2With D
3Between, Ym
3Be connected on D
1With D
3Between, described control circuit is by three time relay 1SJ, 2SJ, 3SJ, three auxiliary relay 1ZJ, 2ZJ, 3ZJ, two A.C. contactor 1JC, 2JC, start button QA, stop button TA and switch LK form, one end of the normally closed point of A.C. contactor 1JC meets time relay 3SJ line Bao Yiduan on the one hand, meet 2ZJ line Bao Yiduan through 3SJ time-delay cut-off point on the one hand, another termination stop button of the normally closed point of 1JC TA one end, normally closed point one end and time relay 2SJ delays time, the normal end of making war of auxiliary relay 3ZJ all connects the same end of stop button TA, the 2SJ normally closed point of delaying time, 3ZJ is often made war and is met 3ZJ line Bao Yiduan behind the other end short circuit, the normal two ends of making war of overcurrent relay GLJ connect an end of TA one end and 2SJ line bag respectively, and 2SJ, 3SJ, 2ZJ, the 3ZJ line bag other end all meets phase line X in the main circuit through fuse RD
13Start button QA two ends are in parallel with A.C. contactor 1JC normal opened contact two ends, its end in parallel meets TA through the normally closed point of 2XJ, its other end one side in parallel and 1JC, 1SJ line Bao Yiduan links, also put an end on the one hand with 1SJ timing closing, the normal end of making war of 1ZJ, normally closed point one end and switch LK one end connect, the 1SJ timing closing point other end and the 1XJ end with 1XJ line bag of often making war behind the other end short circuit, behind normally closed some other end of 1ZJ and the LK other end short circuit with 2JC line Bao Yiduan, the 1JC line bag other end is through normally closed point of RJ and 1SJ, 1ZJ, link with the normal end of making war of 3ZJ behind the 2JC line bag other end short circuit, the normal battle of 3ZJ is that an end meets major loop phase line X through fuse RD
14
2, energy-conservation low pressure squirrel cage motor according to claim 1 starts the compensation control cubicle, it is characterized in that described economize on electricity compensator 1C is by three building-out capacitor C
1, C
2, C
3, three discharge resistance R
1, R
2, R
3, two pressure protector P
1, P
2Form C
1, C
2, C
3Be that triangle connects, triangle wherein two ends respectively through a corresponding pressure protector P
1, P
2Corresponding phase line D with motor D
1, D
3Link, triangle the 3rd end directly meets D phase line D
2, in addition, C
1, C
2, C
3Discharge resistance R respectively in parallel
1, R
2, R
3
3, energy-conservation low pressure squirrel cage motor according to claim 1 starts the compensation control cubicle, it is characterized in that described starting compensator 2C comprises three building-out capacitor C
4, C
5, C
6, three discharge resistance R
4, R
5, R
6, two pressure protector P
3, P
4, C
4, C
5, C
6Be that triangle connects, triangle wherein two ends respectively through a corresponding pressure protector P
3, P
4Link with A.C. contactor 2JC main contacts two side joints point suitable for reading, the 3rd end directly connects 2JC main contacts intermediate contact suitable for reading, in addition, and C
4, C
5, C
6Corresponding discharge resistance R respectively in parallel
4, R
5, R
6
4, energy-conservation low pressure squirrel cage motor according to claim 1 starts the compensation control cubicle, it is characterized in that, at the two-phase X of three-phase 380V power supply
11With X
13Between insert two red eye 1HD, 2HD, greensignal light LD, an amber lamp UD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90217281 CN2086948U (en) | 1990-07-31 | 1990-07-31 | Starting compensation control cabinet for low-voltage energy-saving cage motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90217281 CN2086948U (en) | 1990-07-31 | 1990-07-31 | Starting compensation control cabinet for low-voltage energy-saving cage motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2086948U true CN2086948U (en) | 1991-10-16 |
Family
ID=4896300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90217281 Withdrawn CN2086948U (en) | 1990-07-31 | 1990-07-31 | Starting compensation control cabinet for low-voltage energy-saving cage motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2086948U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420122A (en) * | 2008-12-04 | 2009-04-29 | 上海电器科学研究所（集团）有限公司 | Protection circuit for protecting groove insulation of motor winding |
-
1990
- 1990-07-31 CN CN 90217281 patent/CN2086948U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420122A (en) * | 2008-12-04 | 2009-04-29 | 上海电器科学研究所（集团）有限公司 | Protection circuit for protecting groove insulation of motor winding |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |