CN201869143U - Starter of marine service motor - Google Patents
Starter of marine service motor Download PDFInfo
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- CN201869143U CN201869143U CN 201020651705 CN201020651705U CN201869143U CN 201869143 U CN201869143 U CN 201869143U CN 201020651705 CN201020651705 CN 201020651705 CN 201020651705 U CN201020651705 U CN 201020651705U CN 201869143 U CN201869143 U CN 201869143U
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Abstract
A starter of marine service motor relates to motor starting technology and comprises a three-phase power source, a mouse cage type three-phase asynchronous motor, a three-phase main circuit, a single-phase power source and a starting circuit, wherein the starting circuit comprises AC contactors KM1, KM2 and KM3 and a time-delay relay KT. The starter is characterized in that: the three-phase main circuit comprises current-retaining /current-limiting resistors R1, R2 and R3, and the starting circuit comprises an AC contactor KM4; one end of the R1, one end of the R2 and one end of the R3 are connected with three phase lines of the three-phase power source respectively, and the other ends of the R1, the R2 and the R3 are connected with wiring terminals U2, V2 and W2 of a mouse cage type three-phase asynchronous motor stator winding through a normally-opened main contact KM4-1 of the AC contactor KM4 respectively; the AC contactor KM4 is connected in series with a normally-closed contact KM2-3 of the AC contactor KM2 and then accessed to the time-delay circuit in the starting circuit; and a normally-closed contact KM4-2 of the AC contactor KM4 is arranged on a branch where the normally-closed contact KM2-2 of the AC contactor KM2 and the AC contactor KM3.
Description
Technical field
The utility model relates to the motor start-up technology, refers to a kind of marine service motor starter that can improve the startability of Y/ △ reduced-voltage starting mode particularly.
Background technology
Marine auxiliarys such as boats and ships blower fan, centrifugal pump adopt the squirrel-cage threephase asynchronous as power drive mostly, when reducing motor start-up to the impact of network of ship, its motor starter generally adopts Y/ △ reduced-voltage starting mode, to reach the purpose that reduces starting current.Y/ △ starting device is simple, economic and reliable, uses very extensive at ship domain.
Common Y/ △ starter is connected into Y shape with the threephase stator winding of motor when starting, wait start finish after, again stator winding is connected into △ shape.In the moment that Y/ △ switches, the loop between the motor threephase stator winding disconnects fully, causes motor stator currents to occur interrupting, and motor is in the disengaging electric network state, has caused Y/ △ switching shock, brings adverse effect for the operation of motor.
The utility model content
Technical problem to be solved in the utility model just provides a kind of marine service motor starter, can guarantee that motor stator currents is not interrupted, thereby has improved the motor start-up performance in the moment of Y/ △ switching.
For solving the problems of the technologies described above, a kind of marine service motor starter that the utility model provides, comprise three phase mains, the squirrel-cage threephase asynchronous, the three-phase main circuit, and single phase poaer supply and start-up circuit, described start-up circuit comprises A.C. contactor KM1, KM2, KM3 and time-delay relay KT, described A.C. contactor KM1 is used to be switched on or switched off three phase mains, described A.C. contactor KM2 is used to realize that the △ shape of squirrel-cage three phase stator winding connects, described A.C. contactor KM3 is used to realize that the Y shape of squirrel-cage three phase stator winding connects, described time-delay relay KT is used for the time-delay of Y/ △ handoff procedure, it is characterized in that: described three-phase main circuit comprises three afterflows/current-limiting resistance R1, R2, R3, described start-up circuit comprises A.C. contactor KM4; The end of three afterflow/current-limiting resistance R1, R2, R3 is connected with three phase lines of three phase mains respectively, and the other end of three afterflow/current-limiting resistance R1, R2, R3 is connected with three binding post U2, V2, W2 of squirrel-cage three phase stator winding respectively by the main contact KM4-1 that often opens of A.C. contactor KM4; Described A.C. contactor KM4 inserts the delay circuit in the described start-up circuit with after the normally-closed contact KM2-3 of described A.C. contactor KM2 connects; The normally-closed contact KM4-2 of A.C. contactor KM4 is arranged at normally-closed contact KM2-2 and the A.C. contactor KM3 place branch road of A.C. contactor KM2.
In the technique scheme, three binding post U1, V1 of described squirrel-cage three phase stator winding one end, W1 are connected with three phase mains by the main contact KM1-1 that often opens of A.C. contactor KM1; Three binding post U2, V2 of the stator winding other end of described squirrel-cage threephase asynchronous, W2 are connected with three phase mains by the main contact KM2-1 that often opens of A.C. contactor KM2, and three binding post U2, V2, W2 incorporate mid point into by the main contact KM3-1 that often opens of A.C. contactor KM3.
In the technique scheme, described delay circuit is made of the normally-closed contact KM3-2 of A.C. contactor KM2, A.C. contactor KM3 and the delayed contact KT-3 series connection of time-delay relay KT, and delay circuit is connected the back and links to each other with single phase poaer supply with the normally opened contact KT-2 of time-delay relay KT; Described A.C. contactor KM4 is with after the normally-closed contact KM2-3 of described A.C. contactor KM2 connects, and is in parallel with the delayed contact KT-3 of the normally-closed contact KM3-2 of A.C. contactor KM3 in the delay circuit and time-delay relay KT.
Further, described single phase poaer supply is control transformer TR, and the winding two ends of control transformer TR are connected with two phase lines of described three phase mains, and the secondary winding of control transformer TR is connected with the two ends of described start-up circuit.
The beneficial effects of the utility model are: increased by one group of afterflow/current-limiting resistance R1, R2, R3 in the three-phase main circuit after, during motor Y/ △ reduced-voltage starting, afterflow/current-limiting resistance R1, R2, R3 respectively with three stator parallel connections, connect, at last by short circuit, the electric current of having realized the motor stator winding is continuous, avoided switching shock, made the motor start-up stable performance.
Description of drawings
Fig. 1 is the circuit theory diagrams of an embodiment of the utility model.
The schematic diagram that Fig. 2 connects for Y shape for motor stator winding among Fig. 1.
Fig. 3 connects, is carrying out before Y/ △ switches the connection diagram when afterflow/current-limiting resistance R1, R2, R3 insert the stator loop for Y shape for the motor stator winding.
Fig. 4 switches moment for Y/ △, the connection diagram when afterflow/current-limiting resistance R1, R2, R3 insert the stator loop.
Fig. 5 finishes for Y/ △ switches, the schematic diagram that the motor stator winding connects for △ shape.
Among the figure: U1, U2, V1, V2, W1, W2 are respectively the binding post of squirrel-cage three phase stator winding, and QF is a mains switch, KM1～KM4 is an A.C. contactor, FR is a thermal relay, and KT is a time-delay relay, and S1 is a start button, S2 is a stop button, TR is a control transformer, and H1, H2 are respectively power supply indicator and run indicator, and R1, R2, R3 are afterflow/current-limiting resistance.
Embodiment
Below in conjunction with accompanying drawing a specific embodiment of the present utility model is described in further detail.
As shown in Figure 1, a kind of marine service motor starter of the present utility model, on the basis of common Y/ △ motor starter, in the three-phase main circuit, increased by one group of afterflow/current-limiting resistance R1, R2, R3, and mainly realized the conversion of connected mode between afterflow/current-limiting resistance R1, R2, R3 and the squirrel-cage three phase stator winding by the A.C. contactor KM4 that sets up in the start-up circuit.
Particularly, this marine service motor starter comprises three phase mains, squirrel-cage threephase asynchronous, three-phase main circuit, and single phase poaer supply and start-up circuit.
In the three-phase main circuit: three binding post U1, V1 of squirrel-cage three phase stator winding one end, W1 are connected with three phase mains by the main contact KM1-1 that often opens of A.C. contactor KM1, and realize being switched on or switched off between squirrel-cage threephase asynchronous and the three phase mains by A.C. contactor KM1; Three binding post U2, V2 of the stator winding other end of squirrel-cage threephase asynchronous, W2 are connected with three phase mains by the main contact KM2-1 that often opens of A.C. contactor KM2, and realize that by A.C. contactor KM2 the △ shape of squirrel-cage three phase stator winding connects; Three binding post U2, V2, W2 incorporate mid point into by the main contact KM3-1 that often opens of A.C. contactor KM3, and realize that by A.C. contactor KM3 the Y shape of squirrel-cage three phase stator winding connects.Three afterflow/current-limiting resistance R1, R2, R3 insert the three-phase main circuit, the one end is connected with three phase lines of three phase mains respectively, and the other end is connected with three binding post U2, V2, W2 of squirrel-cage threephase asynchronous respectively by the main contact KM4-1 that often opens of A.C. contactor KM4.
Comprise a delay circuit in the start-up circuit, delay circuit is made of the normally-closed contact KM3-2 of A.C. contactor KM2, A.C. contactor KM3 and the delayed contact KT-3 series connection of time-delay relay KT.After setting up A.C. contactor KM4, A.C. contactor KM4 connects with the normally-closed contact KM2-3 of A.C. contactor KM2, the branch road parallel connection of connecting with the normally-closed contact KM3-2 of A.C. contactor KM2 and A.C. contactor KM3 and constituting is connected with the delayed contact KT-3 of time-delay relay KT then together.The normally-closed contact KM4-2 of A.C. contactor KM4 is arranged at normally-closed contact KM2-2 and the A.C. contactor KM3 place branch road of A.C. contactor KM2.In the start-up circuit, also there is power supply indicator H1 at the two ends of single phase poaer supply, and also there is run indicator H2 at the two ends of A.C. contactor KM2, are respectively applied for indication start-up circuit on power supply and Y/ △ and switch the state of finishing.Also be provided with thermal relay FR in the main line of start-up circuit, be used to realize overload protection.
Single phase poaer supply in the present embodiment is control transformer TR, and its winding two ends is connected with two phase lines of three phase mains, and secondary winding is connected with the two ends of start-up circuit.Certainly, single phase poaer supply also can be taken from other place of network of ship.
The operation principle of this starter is as follows.
Phase I: press start button S1, in the time-delay relay KT(present embodiment, its delayed setting time is 5s) the coil electricity adhesive and pick up counting its normally opened contact KT-1 and KT-2 closure.So, the coil electricity adhesive of A.C. contactor KM3, its normally opened contact KM3-1 and KM3-3 closure, its normally-closed contact KM3-2 disconnects.Normally opened contact KM3-1 closure makes the Y-shaped connection of squirrel-cage three phase stator winding, as shown in Figure 2; Normally opened contact KM3-3 closure makes the coil electricity adhesive of A.C. contactor KM1, and its normally opened contact KM1-1 and KM1-2 closure are so squirrel-cage threephase asynchronous and three phase mains are connected.
Second stage: behind the time-delay 5s, the delayed contact KT-3 closure of time-delay relay KT, the coil electricity adhesive of A.C. contactor KM4, its normally opened contact KM4-1 closure, its normally-closed contact KM4-2 disconnects.At this moment, afterflow/current-limiting resistance R1, R2, R3 insert the stator winding loop that Y shape connects, and in parallel with three stators respectively, as shown in Figure 3.
Phase III: normally-closed contact KM4-2 disconnects, make the coil blackout of A.C. contactor KM3 discharge, its normally opened contact KM3-1 disconnects, making the motor stator winding disconnect Y shape connects, afterflow/current-limiting resistance R1, R2, R3 connect with corresponding threephase stator respectively, the motor stator winding is connected into △ shape, as shown in Figure 4.
The quadravalence section: because the coil blackout of A.C. contactor KM3 discharges, its normally-closed contact KM3-2 recovers closure state.Thereby the coil electricity adhesive of A.C. contactor KM2, its normally opened contact KM2-1 closure makes afterflow/current-limiting resistance R1, R2, R3 bypass, the stator winding of squirrel-cage threephase asynchronous directly is connected into △ shape; Normally-closed contact KM2-2 and the KM2-3 of A.C. contactor KM2 then disconnect, and make the coil blackout of A.C. contactor KM4 discharge, and afterflow/current-limiting resistance R1, R2, R3 disconnect.At this moment, Y/ △ switching is all finished, as shown in Figure 5.
Claims (5)
1. marine service motor starter, comprise three phase mains, the squirrel-cage threephase asynchronous, the three-phase main circuit, and single phase poaer supply and start-up circuit, described start-up circuit comprises A.C. contactor KM1, KM2, KM3 and time-delay relay KT, described A.C. contactor KM1 is used to be switched on or switched off three phase mains, described A.C. contactor KM2 is used to realize that the △ shape of squirrel-cage three phase stator winding connects, described A.C. contactor KM3 is used to realize that the Y shape of squirrel-cage three phase stator winding connects, described time-delay relay KT is used for the time-delay of Y/ △ handoff procedure, it is characterized in that: described three-phase main circuit comprises three afterflows/current-limiting resistance R1, R2, R3, described start-up circuit comprises A.C. contactor KM4; The end of three afterflow/current-limiting resistance R1, R2, R3 is connected with three phase lines of three phase mains respectively, and the other end of three afterflow/current-limiting resistance R1, R2, R3 is connected with three binding post U2, V2, W2 of squirrel-cage three phase stator winding respectively by the main contact KM4-1 that often opens of A.C. contactor KM4; Described A.C. contactor KM4 inserts the delay circuit in the described start-up circuit with after the normally-closed contact KM2-3 of described A.C. contactor KM2 connects; The normally-closed contact KM4-2 of A.C. contactor KM4 is arranged at normally-closed contact KM2-2 and the A.C. contactor KM3 place branch road of A.C. contactor KM2.
2. marine service motor starter according to claim 1 is characterized in that: three binding post U1, V1 of described squirrel-cage three phase stator winding one end, W1 are connected with three phase mains by the main contact KM1-1 that often opens of A.C. contactor KM1; Three binding post U2, V2 of the stator winding other end of described squirrel-cage threephase asynchronous, W2 are connected with three phase mains by the main contact KM2-1 that often opens of A.C. contactor KM2, and three binding post U2, V2, W2 incorporate mid point into by the main contact KM3-1 that often opens of A.C. contactor KM3.
3. marine service motor starter according to claim 1 and 2, it is characterized in that: described delay circuit is made of the normally-closed contact KM3-2 of A.C. contactor KM2, A.C. contactor KM3 and the delayed contact KT-3 series connection of time-delay relay KT, and delay circuit is connected the back and links to each other with single phase poaer supply with the normally opened contact KT-2 of time-delay relay KT; Described A.C. contactor KM4 is with after the normally-closed contact KM2-3 of described A.C. contactor KM2 connects, and is in parallel with the delayed contact KT-3 of the normally-closed contact KM3-2 of A.C. contactor KM3 in the delay circuit and time-delay relay KT.
4. marine service motor starter according to claim 1 and 2 is characterized in that: described single phase poaer supply is control transformer TR; The winding two ends of control transformer TR are connected with two phase lines of described three phase mains, and the secondary winding of control transformer TR is connected with the two ends of described start-up circuit.
5. marine service motor starter according to claim 3 is characterized in that: described single phase poaer supply is control transformer TR; The winding two ends of control transformer TR are connected with two phase lines of described three phase mains, and the secondary winding of control transformer TR is connected with the two ends of described start-up circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020651705 CN201869143U (en) | 2010-12-10 | 2010-12-10 | Starter of marine service motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020651705 CN201869143U (en) | 2010-12-10 | 2010-12-10 | Starter of marine service motor |
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| Publication Number | Publication Date |
|---|---|
| CN201869143U true CN201869143U (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020651705 Expired - Lifetime CN201869143U (en) | 2010-12-10 | 2010-12-10 | Starter of marine service motor |
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| CN (1) | CN201869143U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564008A (en) * | 2012-02-10 | 2012-07-11 | 中国人民解放军63680部队 | Cooling water system of refrigerating machine of ocean vessel |
| CN104333267A (en) * | 2014-10-20 | 2015-02-04 | 信阳师范学院 | Star triangle intelligent soft start controller based on PIC |
| CN106655920A (en) * | 2017-01-24 | 2017-05-10 | 郭自刚 | Starting structure set and method of asynchronous starting permanent-magnet synchronous motor |
| CN109149756A (en) * | 2018-08-30 | 2019-01-04 | 北京机械设备研究所 | A kind of generating set starting 24V and 48V conversion control circuit and method |
| CN110957721A (en) * | 2019-11-25 | 2020-04-03 | 天津津航计算技术研究所 | Current-limiting starting circuit applied to aviation liquid cooling system |
-
2010
- 2010-12-10 CN CN 201020651705 patent/CN201869143U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564008A (en) * | 2012-02-10 | 2012-07-11 | 中国人民解放军63680部队 | Cooling water system of refrigerating machine of ocean vessel |
| CN104333267A (en) * | 2014-10-20 | 2015-02-04 | 信阳师范学院 | Star triangle intelligent soft start controller based on PIC |
| CN104333267B (en) * | 2014-10-20 | 2017-08-29 | 信阳师范学院 | Star triangle intelligent soft starting controller based on PIC |
| CN106655920A (en) * | 2017-01-24 | 2017-05-10 | 郭自刚 | Starting structure set and method of asynchronous starting permanent-magnet synchronous motor |
| CN109149756A (en) * | 2018-08-30 | 2019-01-04 | 北京机械设备研究所 | A kind of generating set starting 24V and 48V conversion control circuit and method |
| CN110957721A (en) * | 2019-11-25 | 2020-04-03 | 天津津航计算技术研究所 | Current-limiting starting circuit applied to aviation liquid cooling system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110615 |