CN208459524U - A kind of three-phase motor break detection circuit - Google Patents
A kind of three-phase motor break detection circuit Download PDFInfo
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- CN208459524U CN208459524U CN201821202364.8U CN201821202364U CN208459524U CN 208459524 U CN208459524 U CN 208459524U CN 201821202364 U CN201821202364 U CN 201821202364U CN 208459524 U CN208459524 U CN 208459524U
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Abstract
The utility model discloses a kind of three-phase motor break detection circuits, are connected to the phase line of one of them in three phase mains and three-phase motor connecting line；The detection circuit includes: the first triode for on-off action, the first optocoupler, for the signal output end of output signal; and the first current-limiting resistance unit, first diode, the first voltage-stabiliser tube, the second current-limiting resistance unit, the second diode, the second voltage-stabiliser tube; when three-phase motor works normally; signal output end persistently exports high level; and when three-phase motor broken string; signal output end exports square-wave signal, so that the broken string progress to three-phase motor quickly judges to carry out subsequent protection.The utility model makes the burn out detection of three-phase motor simple and easy, at low cost, is conducive to promote.
Description
Technical field
The utility model relates to motor burn out detection technical field more particularly to a kind of three-phase motor break detection circuits.
Background technique
Three-phase motor has been widely used in industrial production and daily life, if a certain group of line occurs in three-phase motor
When circle broken string, it is impossible to work normally；And the motor under broken string state, once being powered seriously to generate heat, time slightly length will be because of circle
Between short circuit and burn motor, it is more serious or even fire can be caused to cause disaster accident.For the generation for avoiding problems, at present
Product on the market is all the ready-made motor protecter of purchase, and volume is big, at high cost, is unfavorable for being promoted in the market.
Therefore, there are also to be developed for the prior art.
Utility model content
Place in view of above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a kind of three-phase motor broken strings to examine
Slowdown monitoring circuit, it is intended to so that the burn out detection of three-phase motor is simple and easy, it is at low cost, it is conducive to promote.
To achieve the above object, the utility model takes following technical scheme:
A kind of three-phase motor break detection circuit is connected to the phase of three phase mains with one of them in three-phase motor connecting line
Line；Wherein, the detection circuit includes: the first triode for on-off action, the first optocoupler, for the signal of output signal
Output end and the first current-limiting resistance unit, first diode, the first voltage-stabiliser tube, the second current-limiting resistance unit, the second diode,
Second voltage-stabiliser tube；Described first current-limiting resistance unit one end is connected to a phase line of three-phase electricity source, other end connection the one or two
The cathode of pole pipe, the anode of first diode connect the second port of the first optocoupler and connect the anode of the first voltage-stabiliser tube, and first
The cathode of voltage-stabiliser tube connects zero curve；The first port of first optocoupler by a resistance connect the first triode collector, the one or three
The emitter of pole pipe connects zero curve, and base stage connects the cathode of the second voltage-stabiliser tube, and the anode of the second voltage-stabiliser tube passes through the second current limliting electricity
Resistance unit is connected to the anode of the second diode, and the cathode of the second diode is connected to the same phase line of three-phase electricity generator terminal；First
The third port connection signal output end of optocoupler, and it is connected with pull-up resistor, the 4th port ground connection of the first optocoupler.
Wherein, the three phase mains is connect with three-phase motor connecting line by port, in which: the first zero curve of three phase mains
Port is directly connect with the first zero curve port of three-phase motor；First phase line port of three phase mains and the first phase of three-phase motor
First resistor and second resistance are connected between line end mouth；Second phase line port of three phase mains and the second phase line of three-phase motor
3rd resistor and the 4th resistance are connected between port；The third phase line end mouth of three phase mains and the third phase line end of three-phase motor
The 5th resistance and the 6th resistance are connected between mouthful.
Wherein, the detection circuit is connected to the first phase line port of three phase mains and the first phase line port of three-phase motor
Between, it is in parallel with first resistor and second resistance.
Wherein, the first current-limiting resistance unit includes concatenated 7th resistance and the tenth resistance, the second current limliting electricity
Hindering unit includes concatenated 8th resistance and the 9th resistance.
Wherein, the pull-up resistor is connected with 5V power supply.
Wherein, first voltage-stabiliser tube is also parallel with first capacitor.
Wherein, the chip model of first optocoupler is PC817.
The three-phase motor break detection circuit of the utility model, by three phase mains and three-phase motor connecting line wherein
One of phase line detection circuit is set, which includes the first triode for on-off action, the first optocoupler, for defeated
Out the signal output end of signal and the first current-limiting resistance unit, first diode, the first voltage-stabiliser tube, the second current-limiting resistance unit,
Second diode, the second voltage-stabiliser tube；When three-phase motor works normally, signal output end persistently exports high level, and works as three-phase
When motor breaks, signal output end exports square-wave signal, to quickly judge to the broken string of three-phase motor subsequent to carry out
Protection.The three-phase motor break detection circuit structure of the utility model is simple, and easily manufactured, production cost is low, is suitble in market
On promoted.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the composition schematic diagram of the first embodiment of this practical three-phase motor break detection circuit；
Drawing reference numeral explanation:
100- detection circuit, 10- three phase mains, 20- three-phase motor, the first triode of 40-, the first optocoupler of 50-, 60- letter
Number output end, 70- the first current-limiting resistance unit, 80- the second current-limiting resistance unit.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment
It is only used for explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, such as
When the fruit particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In the present invention unless specifically defined or limited otherwise, term " connection ", " fixation " etc. should do broad sense reason
Solution, for example, " connection " may be a fixed connection, may be a detachable connection, or integral；It can be mechanical connection, it can also
To be electrical connection；It can be directly connected, the connection inside two elements can also be can be indirectly connected through an intermediary
Or the interaction relationship of two elements, unless otherwise restricted clearly.It for the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term in the present invention is understood as the case may be.
In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and cannot manage
Solution is its relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include at least one of the features.
Embodiment one, referring to FIG. 1, being connected to three the utility model proposes a kind of three-phase motor break detection circuit 100
The phase line of one of them in phase power supply 10 and 20 connecting line of three-phase motor；
The detection circuit 100 includes:
For the first triode 40 of on-off action, the first optocoupler 50, for the signal output end 60 of output signal and
One current-limiting resistance unit 70, first diode D1, the first voltage-stabiliser tube ZD1, the second current-limiting resistance unit 80, the second diode D2,
Second voltage-stabiliser tube ZD2；
Described first current-limiting resistance unit, 70 one end is connected to a phase line of three-phase electricity source 10, other end connection the one or two
The cathode of pole pipe D1, the anode of first diode D1 connect the second port of the first optocoupler 50 and connect the first voltage-stabiliser tube ZD1's
The cathode of anode, the first voltage-stabiliser tube ZD1 connects zero curve；
The first port of first optocoupler 50 passes through the collector of first triode of resistance R11 connection 40, the first triode
40 emitter connects zero curve, and base stage connects the cathode of the second voltage-stabiliser tube ZD2, and the anode of the second voltage-stabiliser tube ZD2 passes through the second limit
Leakage resistance unit 80 is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the same of 20 end of three-phase motor
One phase line；
The third port connection signal output end 60 of first optocoupler 50, and it is connected with pull-up resistor R12, the first optocoupler 50
4th port ground connection.
The working principle of detection circuit 100 are as follows: in the case where 20 normal operation of three-phase motor, since three-phase windings are basic
Balance, the first triode 40 (Q1) can not be connected always, be in off state, therefore first optocoupler 50 (U1) internal illumination, two pole
Pipe can not shine, and cause triode inside U1 that can not couple conducting, the third port of U1 is held under the action of pull-up resistor R12
Continuous output high level.When three-phase motor 20 breaks, since three-phase motor is in three-phase imbalance state, the first triode Q1 is led
Logical, in the positive half cycle of sine wave, the first optocoupler U1 can not be connected, and third port is under the action of pull-up resistor R12, output
High level；And when the negative half period of sine wave arrives, the first optocoupler U1 coupling conducting, third port exports low level.Therefore three
When phase motor 20 works normally, signal output end 60 persistently exports high level, and when three-phase motor broken string, signal output end 60
Export the square-wave signal of 50Hz.It is detected whether the level signal exported from signal output end 60 is to the broken string of three-phase motor 20
And judgement, in order to which the subsequent protection to three-phase motor controls.
The three phase mains 10 of the present embodiment is connect with 20 connecting line of three-phase motor by port, in which:
First zero curve port N of three phase mains 10 is directly connect with the first zero curve port N of three-phase motor 20；
First is connected between first phase line port L1 of three phase mains 10 and the first phase line port L1 of three-phase motor 20
Resistance R1 and second resistance R2；
Third is connected between second phase line port L2 of three phase mains 10 and the second phase line port L2 of three-phase motor 20
Resistance R3 and the 4th resistance R4；
The 5th is connected between the third phase line end mouth L3 of three phase mains 10 and the third phase line end mouth L3 of three-phase motor 20
Resistance R5 and the 6th resistance R6.
As an embodiment, the detection circuit 100 of the utility model is connected to the first phase line port of three phase mains 10
It is in parallel with first resistor R1 and second resistance R2 between L1 and the first phase line port L1 of three-phase motor 20.It is appreciated that detection
Circuit 100 also can connect in L2 or L3 phase line.
The first current-limiting resistance unit 70 of the present embodiment includes concatenated 7th resistance R7 and the tenth resistance R10, and described the
Two current-limiting resistance units 80 include concatenated 8th resistance R8 and the 9th resistance R9.
The pull-up resistor R12 of the present embodiment is connected with 5V power supply.
Preferably, the first voltage-stabiliser tube ZD1 of the present embodiment is also parallel with first capacitor C1.First capacitor C1 prevents the first light
The output signal of coupling U1 is disturbed.
The chip model of first optocoupler 50 of the utility model embodiment is PC817.PC817 is common model, using normal
With the device of model convenient for acquisition and maintenance.
100 structure of three-phase motor break detection circuit of the utility model is simple, substantially by resistance, diode, optocoupler
Equal customary components are constituted, easily manufactured while carrying out burn out detection to three-phase motor to carry out subsequent protection, are produced into
This is low, is suitble to be promoted in the market.
The three-phase motor break detection circuit 100 that the utility model embodiment proposes, by three phase mains 10 and three-phase
Detection circuit 100 is arranged in the phase line of one of them in 20 connecting line of motor, which includes for on-off action
One triode 40, the first optocoupler 50, signal output end 60 and the first current-limiting resistance unit the 70, the 1st for output signal
Pole pipe D1, the first voltage-stabiliser tube ZD1, the second current-limiting resistance unit 80, the second diode D2, the second voltage-stabiliser tube ZD2；Work as three-phase motor
When 20 normal work, signal output end 60 persistently exports high level, and when three-phase motor 20 breaks, signal output end 60 exports
Square-wave signal, so that the broken string progress to three-phase motor 20 quickly judges to carry out subsequent protection.The three-phase electricity of the utility model
100 structure of machine break detection circuit is simple, easily manufactured, and production cost is low, is suitable for carrying out Rapid Popularization application in the market.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
Under all utility models in the utility model are conceived, equivalent structure made based on the specification and figures of the utility model
Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (7)
1. a kind of three-phase motor break detection circuit is connected to the phase of three phase mains with one of them in three-phase motor connecting line
Line；It is characterized in that,
The detection circuit includes:
For the first triode of on-off action, the first optocoupler, for the signal output end and the first current-limiting resistance of output signal
Unit, first diode, the first voltage-stabiliser tube, the second current-limiting resistance unit, the second diode, the second voltage-stabiliser tube；
Described first current-limiting resistance unit one end is connected to a phase line of three-phase electricity source, and the other end connects the yin of first diode
Pole, the anode of first diode connect the second port of the first optocoupler and connect the anode of the first voltage-stabiliser tube, the first voltage-stabiliser tube
Cathode connects zero curve；
The first port of first optocoupler connects the collector of the first triode by a resistance, and the emitter of the first triode connects zero
Line, base stage connect the cathode of the second voltage-stabiliser tube, and the anode of the second voltage-stabiliser tube is connected to second by the second current-limiting resistance unit
The anode of diode, the cathode of the second diode are connected to the same phase line of three-phase electricity generator terminal；
The third port connection signal output end of first optocoupler, and it is connected with pull-up resistor, the 4th port ground connection of the first optocoupler.
2. three-phase motor break detection circuit according to claim 1, which is characterized in that the three phase mains and three-phase electricity
Machine connecting line is connected by port, in which:
First zero curve port of three phase mains is directly connect with the first zero curve port of three-phase motor；
First resistor and the second electricity are connected between first phase line port of three phase mains and the first phase line port of three-phase motor
Resistance；
3rd resistor and the 4th electricity are connected between second phase line port of three phase mains and the second phase line port of three-phase motor
Resistance；
The 5th resistance and the 6th electricity are connected between the third phase line end mouth of three phase mains and the third phase line end mouth of three-phase motor
Resistance.
3. three-phase motor break detection circuit according to claim 2, which is characterized in that
The detection circuit is connected between the first phase line port of three phase mains and the first phase line port of three-phase motor, with
One resistance and second resistance are in parallel.
4. three-phase motor break detection circuit according to claim 1, which is characterized in that the first current-limiting resistance unit
Including concatenated 7th resistance and the tenth resistance, the second current-limiting resistance unit includes concatenated 8th resistance and the 9th electricity
Resistance.
5. three-phase motor break detection circuit according to claim 1, which is characterized in that the pull-up resistor is connected with 5V
Power supply.
6. three-phase motor break detection circuit according to claim 1, which is characterized in that first voltage-stabiliser tube is also in parallel
There is first capacitor.
7. three-phase motor break detection circuit according to claim 1, which is characterized in that first optocoupler it is chip-shaped
Number be PC817.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821202364.8U CN208459524U (en) | 2018-07-27 | 2018-07-27 | A kind of three-phase motor break detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821202364.8U CN208459524U (en) | 2018-07-27 | 2018-07-27 | A kind of three-phase motor break detection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN208459524U true CN208459524U (en) | 2019-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821202364.8U Active CN208459524U (en) | 2018-07-27 | 2018-07-27 | A kind of three-phase motor break detection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111856332A (en) * | 2020-07-17 | 2020-10-30 | 力高(山东)新能源技术有限公司 | Circuit and method for detecting disconnection of shunt |
-
2018
- 2018-07-27 CN CN201821202364.8U patent/CN208459524U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111856332A (en) * | 2020-07-17 | 2020-10-30 | 力高(山东)新能源技术有限公司 | Circuit and method for detecting disconnection of shunt |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190311 Address after: 330000 No. 22 Workshop of Jiahai Industrial Park, No. 2799 Tianxiang Avenue, Nanchang High-tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee after: Jiangxi Newland Electronics Co. Ltd. Address before: 518000 Guangdong Province Guangming New District Gongming Shangcun Yongbei Golden Earrings Industrial Zone Guangdong Dunmen Industry Patentee before: Sheng Xin |