CN203243025U - Ship motor insulation state detecting circuit - Google Patents
Ship motor insulation state detecting circuit Download PDFInfo
- Publication number
- CN203243025U CN203243025U CN2013201950905U CN201320195090U CN203243025U CN 203243025 U CN203243025 U CN 203243025U CN 2013201950905 U CN2013201950905 U CN 2013201950905U CN 201320195090 U CN201320195090 U CN 201320195090U CN 203243025 U CN203243025 U CN 203243025U
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- CN
- China
- Prior art keywords
- motor
- relay
- magnetic starter
- insulation
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a ship motor insulation state detecting circuit comprising a magnetic starter which is connected with a motor. The magnetic starter is connected with a detecting module which controls the on/off of the magnetic starter according to variations of the insulation resistance on a motor shell. According to the ship motor insulation state detecting circuit, the variations of the insulation performance (i.e. the resistance) on the motor shell is adopted to judge whether the insulation performance of the motor goes wrong. If the insulation performance of the motor goes wrong, the magnetic starter supplying power to the motor is turned off, and then the motor is stopped to have a corresponding maintenance so that a greater damage to the motor caused by a continuous use in the state without the insulation is avoided. Therefore, objectives of finding the problem in time and then keeping the motor running for a long time are achieved.
Description
Technical field
The utility model relates to the safety of ship field, is specifically related to a kind of motor insulation control device of pointing out warning by motor state of insulation on the detection boats and ships.
Background technology
A lot of electric equipments are arranged in large ship; and motor has occupied the 70-80% of an electric total load of ship; often can be because high temperature in the motor use procedure; high humidity; the reasons such as high vibration and/or starter make-break operation overvoltage; cause the motor insulating material constantly to chap; aging; if motor is when being in the use state or being in the dry environment always; its insulating resistance value generally can meet the requirements; but when long, ask and shut down or when air humidity surpasses 80%; its insulation values can sharply descend, and this also is 7; August, its electrical system of boats and ships of docking was prone to the reason of Insulation Problems.In addition, when being subjected under special circumstances water projection or immersion, the insulation resistance of motor also can significantly reduce, even can be down to 0, it is more serious to structural deteriorations such as the insulating material of motor and silicon steel sheets when particularly seawater enters, processing untimely or imappropriately often needs to change winding even can cause scrapping of motor, cause larger loss, the Electromotor Reparation of boats and ships or when changing man-hours requirement and accounting for the whole repair work chief engineer of boats and ships more than 20%, therefore, how to realize to the automation detection and control of motor insulation property that in time pinpointing the problems the normal operation of marinemotor is had important function.
The utility model content
The marinemotor insulating material goes wrong and can not in time find in the prior art in order to solve, the problem that finally causes motor to damage, the utility model provide a kind of and can automatically detect at any time on the marinemotor insulating material performance and send the control circuit of corresponding warning.Concrete scheme is as follows: a kind of marinemotor state of insulation testing circuit, comprise the magnetic starter that is connected with motor, it is characterized in that, be connected with the detection module of controlling the magnetic starter break-make according to insulation resistance variation on the motor field frame on the described magnetic starter.
Preferred version of the present utility model: described detection module comprises the power supply unit that sends the detection electric current, judge whether the power supply unit change in voltage exceeds the logic judgment unit of set point, the relay of control magnetic starter supply line break-make, described power supply unit is connected with motor casing, logic control element respectively, and described logic control element is connected with relay.
For improving certainty of measurement: be provided with the voltage amplification unit between described power supply unit and the logic judgment unit.
For realizing different functions: described relay comprises the relay K V that connects warning signal
2, connect the relay K V of alarm signal
3Relay K V with control magnetic starter supply line break-make
1, wherein each relay is connected with logic judgment unit respectively.
Be the convenient supply line that controls: described relay K V
1Input by successively the series winding switch S
2With interlocking contactor KM
2Be connected with the supply line of magnetic starter, described magnetic starter comprises the switch S that is connected in parallel in the supply line
1With interlocking contactor KM
1
The utility model utilizes the variation of insulation property on the motor field frame (being resistance) to judge whether the insulation property of motor go wrong; when going wrong, then be broken as the magnetic starter of motor power supply; motor is shut down in time to keep in repair accordingly; avoid motor under the naked state, to continue to use and cause larger infringement; reach early and pinpoint the problems, thereby keep the permanent purpose of moving of motor.
Description of drawings
Fig. 1 circuit diagram of the present utility model;
Attached number in the figure explanation: 1-motor, 2-magnetic starter, 3-power supply unit, 4-voltage amplification unit, 5-logic judgment unit.
Embodiment
As shown in Figure 1, marinemotor state of insulation testing circuit of the present utility model, comprise the magnetic starter 2 that is connected with motor 1, be connected with the detection module of controlling magnetic starter 2 break-makes according to insulation resistance variation on the motor field frame on the described magnetic starter 2.This programme utilizes the variation of insulation property on the motor field frame (being resistance) to judge whether the insulation property of motor go wrong; when going wrong, then be broken as the magnetic starter 2 of motor 1 power supply; motor 1 is shut down in time to keep in repair accordingly; avoid motor 1 under the naked state, to continue to use and cause larger infringement; reach early and pinpoint the problems, thereby keep the permanent purpose of moving of motor.
As shown in Figure 1, concrete testing circuit can adopt following structure: detection module of the present utility model comprises the power supply unit 3 that sends the detection electric current, judge whether power supply unit 3 change in voltage exceed the logic judgment unit 5 of set point, the relay of control magnetic starter 2 supply line's break-makes, described power supply unit 3 is connected with motor 1 shell, logic control element 5 respectively, and described logic control element 5 is connected with relay.During work, power supply unit 3 is carried electric current to motor 1 shell, if this moment, motor field frame insulated, then size of current remains unchanged and voltage also is stable; If the insulation property of motor field frame lost efficacy; the phenomenon that electric current increases then can appear; because electric current increases corresponding voltage and also can increase; after the phenomenon that this voltage increases is transported to logic judgment unit 5; magnitude of voltage when logic judgment unit 5 is understood the motor casing failure of insulation of current voltage signal and setting compares; if exceed set point then can send the control signal that disconnects magnetic starter 2 supply line's switches to relay; motor 1 also quit work after magnetic starter 2 lost power supply, thereby reached the purpose of in time pinpointing the problems to protect motor.
For adapting to different motor power (output)s: be provided with voltage amplification unit 4 between power supply unit 3 of the present utility model and the logic judgment unit 5.Can be with small and weak voltage amplification to the degree that adapts with current motor power (output) by voltage amplification unit 4, realize realizing the purpose that detects, the purpose that reaches Cost reduction and be easy to detect with low power power supply unit 3.
For reaching different effects: relay of the present utility model comprises the relay K V that connects warning signal
2, connect the relay K V of alarm signal
3Relay K V with control magnetic starter 2 supply line's break-makes
1Wherein each relay is connected with logic judgment unit 5 respectively, each relay connects respectively corresponding on-off switch, logic judgment unit 5 is by realizing the relay of difference in functionality, can send alarm signal and the make-and-break signal of break-make magnetic starter according to circumstances of alerting signal, the significant trouble of corresponding minor failure.
For making the supply line that testing circuit can the break-make magnetic starter: described relay K V
1Input by successively the series winding switch S
2With interlocking contactor KM
2Be connected with the supply line of magnetic starter 2, described magnetic starter 2 comprises the switch S that is connected in parallel in the supply line
1With interlocking contactor KM
1
Embodiment 1:
As shown in Figure 1, under the motor normal operating condition, switch S
2Close, and by interlocking contactor KM
2With the relay K V in the marinemotor state of insulation testing circuit
1On, relay K V
1Normally opened contact K
4And the K switch of power supply unit
5, K
6Closure is passed through K switch
1And K
5Power supply unit is connected in the electrical network, and power supply unit is transformed to direct current output, the output voltage U of power supply unit with the input of 220V alternating current
CBe connected on the in check motor resistance R that the power supply unit negative pole connects
SThe upper voltage that passes through is directly proportional with its electric current of flowing through, and flows through R
SElectric current by motor winding cable wire insulation resistance R
cAnd the insulation resistance R between motor winding and the shell
mDetermine.To flow through resistance R
SVoltage amplify through amplifying unit, and at logic judgment unit this voltage and set point are compared, if the motor insulation damages, then Rm or Rc can reduce, and electric current becomes greatly, flows through resistance R
SOn voltage greater than set point (R
SVoltage is electric current and R
SProduct), logic judgment unit just produces control signal so, connects the warning signal link, i.e. relay K V
2Coil is connected, KV
2Normally opened contact K
2Closure, alarm lamp HL lights, simultaneously logic judgment unit engage relay KV
3Coil, KV
3Normally opened contact K
3Closure, alarming horn HA connects, KV
1Normally-closed contact K
4Disconnect, cut off the magnetic starter power supply, contactor C tripping, motor shuts down, and has realized the automation of insulating monitoring and control.
Power supply unit adopts GS50030 in this programme, and GS50030 is the intelligence switch controller integrated circuit of a high-performance electric stream mode, aims at the non-isolated off-line such as small household appliances control board power supply and DC-to-DC switch-type voltage-dropping converter and designs.Its inside is integrated with complete PWM/PFM mixing control circuit, up to the withstand voltage power switch circuit of 700V, fault detect and protective circuit, clock and delay control circuit etc.; under the super wide line voltage condition of 85-380Vac, has the output-current rating ability that is not less than 400mA.The voltage amplification unit adopts INA118, and it has precision height, low in energy consumption, the advantage such as common-mode rejection ratio is high and working band is wide, is fit to various tiny signals are amplified.The current feedback structure of INA118 uniqueness is so that it also can keep very high frequency bandwidth under higher gain.INA118 is owing to include input protection circuit, and therefore, if the input overload, protective circuit will be limited in 1.5mA to input current in the safe range of 5mA, to guarantee the safety of subsequent conditioning circuit.Logic judgment unit adopts LM324, LM324 is the four high guaily unit integrated circuit, it adopts 14 pin dual-in-line Plastic Package, inside comprises four groups of identical operational amplifiers of form, except power sharing, four groups of amplifiers are separate, and LM324 four high guaily unit circuit has the supply voltage wide ranges, quiescent dissipation is little, but the characteristics such as single supply use.
The above only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, although the utility model discloses as above with preferred embodiment, yet be not to limit the utility model, anyly be familiar with the technical staff of this patent within not breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned prompting is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, any simple modification that foundation technical spirit of the present utility model is done above embodiment, equivalent variations and modification all still belong in the scope of the utility model scheme.
Claims (4)
1. marinemotor state of insulation testing circuit, comprise the magnetic starter (2) that is connected with motor (1), it is characterized in that, be connected with the detection module of controlling magnetic starter (2) break-make according to insulation resistance variation on the motor field frame on the described magnetic starter (2); Described detection module comprises the power supply unit (3) that sends the detection electric current, judge whether power supply unit (3) change in voltage exceeds the logic judgment unit (5) of set point, the relay of control magnetic starter (2) supply line break-make, described power supply unit (3) is connected with motor casing, logic control element (5) respectively, and described logic control element (5) is connected with relay.
2. a kind of marinemotor state of insulation testing circuit as claimed in claim 1 is characterized in that, is provided with voltage amplification unit (4) between described power supply unit (3) and the logic judgment unit (5).
3. a kind of marinemotor state of insulation testing circuit as claimed in claim 2 is characterized in that described relay comprises the relay K V that connects warning signal
2, connect the relay K V of alarm signal
3Relay K V with control magnetic starter (2) supply line break-make
1, wherein each relay is connected with logic judgment unit (5) respectively.
4. a kind of marinemotor state of insulation testing circuit as claimed in claim 3 is characterized in that described relay K V
1Input by successively the series winding switch S
2With interlocking contactor KM
2Be connected with the supply line of magnetic starter (2), described magnetic starter (2) comprises the switch S that is connected in parallel in the supply line
1With interlocking contactor KM
1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201950905U CN203243025U (en) | 2013-04-18 | 2013-04-18 | Ship motor insulation state detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201950905U CN203243025U (en) | 2013-04-18 | 2013-04-18 | Ship motor insulation state detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203243025U true CN203243025U (en) | 2013-10-16 |
Family
ID=49320284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201950905U Expired - Fee Related CN203243025U (en) | 2013-04-18 | 2013-04-18 | Ship motor insulation state detecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203243025U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106468763A (en) * | 2015-08-21 | 2017-03-01 | 王静爽 | A kind of online Insulation monitoring control method of motor stopping |
| CN113406459A (en) * | 2021-07-21 | 2021-09-17 | 国网智慧能源交通技术创新中心(苏州)有限公司 | Insulation detection system and detection method for large-capacity charging system of electric ship |
-
2013
- 2013-04-18 CN CN2013201950905U patent/CN203243025U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106468763A (en) * | 2015-08-21 | 2017-03-01 | 王静爽 | A kind of online Insulation monitoring control method of motor stopping |
| CN113406459A (en) * | 2021-07-21 | 2021-09-17 | 国网智慧能源交通技术创新中心(苏州)有限公司 | Insulation detection system and detection method for large-capacity charging system of electric ship |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20140418 |