CN205791468U - Integrated protector for electric motor - Google Patents
Integrated protector for electric motor Download PDFInfo
- Publication number
- CN205791468U CN205791468U CN201620549031.7U CN201620549031U CN205791468U CN 205791468 U CN205791468 U CN 205791468U CN 201620549031 U CN201620549031 U CN 201620549031U CN 205791468 U CN205791468 U CN 205791468U
- Authority
- CN
- China
- Prior art keywords
- circuit
- schmidt trigger
- electric motor
- overload
- outfan
- 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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- Protection Of Generators And Motors (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
This utility model relates to a kind of integrated protector for electric motor, including power circuit, there is the overload sample circuit of the first adjustable resistance, there is the multi-resonant oscillating circuit of the first Schmidt trigger, disconnected phase sampler circuit, there is the control output circuit of the second Schmidt trigger, and there is the relay drive circuit of switching tube, the dividing point of the first adjustable resistance is connected to the input of the first Schmidt trigger through resistance, the outfan of the first Schmidt trigger is connected to the input of the second Schmidt trigger through adjustable delay circuit, the outfan of the second Schmidt trigger is through current limliting, after rectification is in parallel with the outfan of disconnected phase sampler circuit, it is connected to the base stage of switching tube together.Adjusted overcurrent multiple by the first adjustable resistance; and adjustable delay circuit scalable itself is transshipped movement time; can achieve the overload of integrated protector for electric motor, short-circuit protection characteristic curve can be open presetting, has simple in construction, design simplicity, the feature of low cost.
Description
Technical field
This utility model relates to a kind of integrated protector for electric motor.
Background technology
General, integrated protector for electric motor has phase shortage, overload and short-circuit protection function.When
When there is phase shortage in motor operation course, protector can be the most promptly by motor
Disconnect with its power supply.When the running current of motor exceedes the overcurrent value of setting, or
Occur close to short circuit exception big electric current time, protector according to anti-time limit characteristic, i.e. overload magnification
Greatly, operation time limit is short；Overload magnification is little, and the operation curve of operation time limit length cuts off motor and bears
The power supply carried, it is ensured that the safety of motor.Existing integrated protector for electric motor uses single
Sheet machine completes the exploitation of integrated protector for electric motor, when the overload of motor, short-circuit protection action
Between drawn by the anti-time limit characteristic Equation for Calculating being pre-stored in single-chip microcomputer, once burning, inverse time lag
Characteristic curve be i.e. fixing, it is impossible to enough open carry out, to user, fine setting of adjusting, it addition, singly
The cost of sheet machine design system is the highest.
Summary of the invention
The purpose of this utility model is to overcome the defect of prior art, it is provided that a kind of motor
Transship, short-circuit protection characteristic curve can be open presetting, and product design is easy, the electricity of low cost
Motivation protector.
For achieving the above object, this utility model uses such a integrated protector for electric motor,
Including power circuit,
Overload sample circuit, in order to gather the overload signal of motor load, overload sample circuit
Including the first adjustable resistance, the first adjustable resistance is in order to regulate over-current adjusting multiple；
Multi-resonant oscillating circuit, including the first Schmidt trigger, effective electricity of multi-resonant oscillating circuit
Flat duration multiple of adjusting to overload is relevant；
Disconnected phase sampler circuit, including three groups of sampling transformators, symbolic animal of the birth year disconnected in order to gather respectively
Phase signals；
Control output circuit, including the second Schmidt trigger, send control in order to circuit to the back-end
Signal processed；
Relay drive circuit, including switching tube, in order to main contactor send open-phase protection and
The relay signal of overload protection, the three-phase contact of main contactor is series at the power supply of motor load
In circuit；
The dividing point of the first adjustable resistance is connected to the input of the first Schmidt trigger through resistance
End, the outfan of the first Schmidt trigger is connected to the second schmidt trigger through adjustable delay circuit
The input of device, the outfan of the second Schmidt trigger is through current limliting, rectification and disconnected phase sampler electricity
After the outfan parallel connection on road, it is connected to the base stage of switching tube together.Compared with the prior art, this reality
It is embodied in novel beneficial effect: adjusted overcurrent multiple by the first adjustable resistance, by many
Resonance oscillation circuit exports the significant level that multiple of adjusting to overload is relevant, and overload magnification value of adjusting is more
Greatly, in the impulse wave of multi-resonant oscillating circuit output, the significant level time is the longest, adjustable delay circuit
Charging interval the shortest, control output circuit can output protection action control signal quickly,
And adjustable delay circuit scalable itself is transshipped movement time, general motor can be achieved
The overload of protector, short-circuit protection characteristic curve can be open presetting, have simple in construction, set
Meter simplicity, the feature of low cost.
Particularly, the first Schmidt trigger includes the one 555 intervalometer, and the second Schmidt touches
Sending out device and include the 2nd 555 intervalometer, adjustable delay circuit includes the second adjustable resistance and electric capacity
Device, the second adjustable resistance in order to regulate stream movement time, the outfan of the one 555 intervalometer
The negative pole end of described capacitor, the negative pole of capacitor it is connected to through the dividing point of the second adjustable resistance
End is connected with the input of the second Schmidt trigger.The Schmidt being made up of 555 intervalometers touches
Sending out device, logic is simple, it is simple to design output.
Particularly, integrated protector for electric motor also includes disconnected phase locking protection circuit, breaks and locks mutually
Protection circuit includes diode, anti-and connect between colelctor electrode and the negative pole end of capacitor of switching tube
Diode.When open-phase running occurs in motor load, and switching tube turns on, the colelctor electrode of switching tube
Or even the level of capacitor anode end is pulled low, the anti-phase letter of output of the second Schmidt trigger
Number, switching tube maintains conducting, it is achieved the function of open-phase protection locking, until system power failure resets
Open-phase protection locking can be released.
Particularly, the outfan of three groups of sampling transformators is the most rectified, filtering, after current limliting respectively
Being connected to the first audion, the second audion, the base stage of the 3rd audion, the first audion is through upper
Pull-up resistor is connected to DC source, and the emitter stage of the first audion and the colelctor electrode of the second audion are even
Connecing, the emitter stage of the second audion and the colelctor electrode of the 3rd audion connect, the 3rd audion
Emitter stage is connected to the ground, the colelctor electrode of the first audion pick out disconnected phase sampler letter through delay circuit
Number.By the design of above circuit structure, the colelctor electrode of the first audion export phase shortage logic
Level signal, reduces the secondary loss of sampling transformator, and circuit structure is simple, Qi Zhongyan
Time circuit can effectively stop interference maloperation make.
Particularly, integrated protector for electric motor also includes overload sound light alarming circuit, overload acousto-optic
The connection end that controls of warning circuit is connected to the outfan of the first Schmidt trigger.More than by
The design of circuit structure, multi-resonant oscillating circuit the pulse signal exported directly controls overload acousto-optic
Warning circuit, due to unified logic, significantly simplify circuit.
Accompanying drawing explanation
Fig. 1 is the functional-block diagram of this utility model integrated protector for electric motor；
Fig. 2 is the schematic diagram of this utility model integrated protector for electric motor.
Detailed description of the invention
As shown in Fig. 1～2, a kind of integrated protector for electric motor, including power circuit,
Overload sample circuit, in order to gather the overload signal of motor load, overload sample circuit
Including the first adjustable resistance R6, the first adjustable resistance R6 is in order to regulate over-current adjusting multiple；
Multi-resonant oscillating circuit, including the first Schmidt trigger, effective electricity of multi-resonant oscillating circuit
Flat duration multiple of adjusting to overload is relevant；
Disconnected phase sampler circuit, including three groups of samplings transformator TA1, TA2, TA3, respectively in order to
Gather the disconnected phase signals of institute's symbolic animal of the birth year；
Control output circuit, including the second Schmidt trigger, send control in order to circuit to the back-end
Signal processed；
Relay drive circuit, including switching tube V4, protects mutually in order to send to break to main contactor
Protecting the relay signal with overload protection, the three-phase contact of main contactor is series at motor load
In supply line；
The dividing point of the first adjustable resistance R6 is connected to the first Schmidt trigger through resistance R9
Input, the outfan of the first Schmidt trigger is connected to the second Schmidt through adjustable delay circuit
The input of trigger, the outfan of the second Schmidt trigger is adopted with disconnected mutually through current limliting, rectification
After the outfan parallel connection of sample circuit, it is connected to the base stage of switching tube V4 together.
First Schmidt trigger includes the one 555 intervalometer U1A, the second Schmidt trigger
Including the 2nd 555 intervalometer U1B, adjustable delay circuit includes the second adjustable resistance RW2 and electricity
Container C6, the second adjustable resistance RW2 in order to regulate stream movement time, the one 555 timing
The outfan of device U1A is connected to the negative pole of capacitor C6 through the dividing point of the second adjustable resistance RW2
End, the negative pole end of capacitor C6 and the input of the second Schmidt trigger connect.
Integrated protector for electric motor also includes disconnected phase locking protection circuit, disconnected phase locking protection circuit
Including between colelctor electrode and the negative pole end of capacitor C6 of diode D14, switching tube V4 anti-the most also
Meet diode D14.
Three groups sampling transformator TA1, TA2, TA3 outfan the most rectified, filtering, current limliting
After be respectively connected to the first audion V3, the second audion V2, the base stage of the 3rd audion V1,
First audion V3 is connected to DC source VCC through pull-up resistor R14, the first audion V3's
The colelctor electrode of emitter stage and the second audion V2 connects, the emitter stage of the second audion V2 and the
The colelctor electrode of three audion V1 connects, and the emitter stage of the 3rd audion V1 is connected to the ground, by the
The colelctor electrode of one audion V3 picks out disconnected phase sampler signal through delay circuit.
Integrated protector for electric motor also includes overload sound light alarming circuit, overload sound light alarming circuit
Control connect end and be connected to the outfan of the first Schmidt trigger.Overload sound light alarming circuit
Including current-limiting resistance R8, R12, buzzer FM1 and overload light LED1.
Claims (6)
1. an integrated protector for electric motor, it is characterised in that: include power circuit；
Overload sample circuit, in order to gather the overload signal of motor load, described overload is adopted
Sample circuit includes the first adjustable resistance, and the first described adjustable resistance is in order to regulate over-current adjusting times
Number；
Multi-resonant oscillating circuit, including the first Schmidt trigger, described multi-resonant oscillating circuit
The duration of significant level multiple of adjusting to described overload is relevant；
Disconnected phase sampler circuit, including three groups of sampling transformators, symbolic animal of the birth year disconnected in order to gather respectively
Phase signals；
Control output circuit, including the second Schmidt trigger, send control in order to circuit to the back-end
Signal processed；
Relay drive circuit, including switching tube, in order to main contactor send open-phase protection and
The relay signal of overload protection, the three-phase contact of described main contactor is series at motor load
Supply line in；
The dividing point of the first described adjustable resistance is connected to the first described Schmidt through resistance
The input of trigger, the outfan of the first described Schmidt trigger is through adjustable delay circuit
It is connected to the input of the second Schmidt trigger, the outfan of the second described Schmidt trigger
After current limliting, rectification are in parallel with the outfan of described disconnected phase sampler circuit, it is connected to described together
The base stage of switching tube.
Integrated protector for electric motor the most according to claim 1, it is characterised in that: institute
The first Schmidt trigger stated includes the one 555 intervalometer, the second described schmidt trigger
Device includes that the 2nd 555 intervalometer, described adjustable delay circuit include the second adjustable resistance and electricity
Container, the second described adjustable resistance in order to regulate stream movement time, described the 1st
The outfan of intervalometer is connected to the negative pole of described capacitor through the dividing point of the second adjustable resistance
End, the negative pole end of described capacitor connects with the input of the second described Schmidt trigger
Connect.
Integrated protector for electric motor the most according to claim 2, it is characterised in that: institute
The integrated protector for electric motor stated also includes that disconnected phase locking protection circuit, described breaking lock guarantor mutually
Protection circuit includes the negative pole end of diode, the colelctor electrode of described switching tube and described capacitor
Between anti-and connect described diode.
4. according to the integrated protector for electric motor described in claim 1,2 or 3, its feature
Be: the outfan of described three groups of sampling transformators is the most rectified, filtering, after current limliting respectively
It is connected to the first audion, the second audion, the base stage of the 3rd audion, the one or three described pole
Pipe is connected to DC source through pull-up resistor, the emitter stage of the first described audion and described the
The colelctor electrode of two audions connects, the emitter stage of the second described audion and the described the 3rd 3
The colelctor electrode of pole pipe connects, and the emitter stage of the 3rd described audion is connected to the ground, by described
The colelctor electrode of the first audion picks out disconnected phase sampler signal through delay circuit.
5. according to the integrated protector for electric motor described in claim 1,2 or 3, its feature
It is: described integrated protector for electric motor also includes overload sound light alarming circuit, described mistake
The connection end that controls carrying sound light alarming circuit is connected to the defeated of the first described Schmidt trigger
Go out end.
Integrated protector for electric motor the most according to claim 4, it is characterised in that: institute
The integrated protector for electric motor stated also includes overload sound light alarming circuit, described overload acousto-optic report
The connection end that controls of alert circuit is connected to the outfan of the first described Schmidt trigger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620549031.7U CN205791468U (en) | 2016-06-02 | 2016-06-02 | Integrated protector for electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620549031.7U CN205791468U (en) | 2016-06-02 | 2016-06-02 | Integrated protector for electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205791468U true CN205791468U (en) | 2016-12-07 |
Family
ID=58134635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620549031.7U Expired - Fee Related CN205791468U (en) | 2016-06-02 | 2016-06-02 | Integrated protector for electric motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205791468U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445097A (en) * | 2019-07-24 | 2019-11-12 | 浙江亿驰电气科技有限公司 | A kind of idle motor protector |
-
2016
- 2016-06-02 CN CN201620549031.7U patent/CN205791468U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445097A (en) * | 2019-07-24 | 2019-11-12 | 浙江亿驰电气科技有限公司 | A kind of idle motor protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20200602 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |