CN205921366U - Send out motor over -current overvoltage protector - Google Patents
Send out motor over -current overvoltage protector Download PDFInfo
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- CN205921366U CN205921366U CN201620840758.0U CN201620840758U CN205921366U CN 205921366 U CN205921366 U CN 205921366U CN 201620840758 U CN201620840758 U CN 201620840758U CN 205921366 U CN205921366 U CN 205921366U
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Abstract
The utility model discloses a send out motor over -current overvoltage protector, include: microcomputer control panel, generator unidirectional voltage detection module, generator three phase current detection module, direct -current stabilized -voltage power circuit, relay output module, the alarm, data display module instructs the lamp module piece, adjusting module, generator unidirectional voltage detection module, generator three phase current detection module, the corresponding input end group with microcomputer control panel of adjusting module are connected, relay output module, alarm, data display module, the corresponding output end group with microcomputer control panel of instruction lamp module piece are connected. The utility model provides an overflow the technical problem that overvoltage protection reliability low of prior art to the generator, can collect overflow, excessive pressure, undervoltage protection and delay control in an organic whole.
Description
Technical field
This utility model is related to electrical equipment, more particularly, to a kind of electromotor overcurrent and overvoltage protector.
Background technology
In traditional plant protection system, for more than the over-current over-voltage protection of electromotor using relay system protection dress
Put.Relay system protection device is multiple relay composition, lacks precise control, therefore reliability is low.
Utility model content
This utility model embodiment is passed through to provide a kind of electromotor overcurrent and overvoltage protector, and it is right in prior art to solve
In the low technical problem of the over-current over-voltage protection reliability of electromotor.
A kind of electromotor overcurrent and overvoltage protector that this utility model embodiment provides, comprising: microcomputer control panel, sends out
Motor unidirectional voltage detection module, electromotor three-phase current detection module, DC-stabilized circuit, relay output module,
Alarm, digital display module, indicating lamp module, adjustment module；
Described electromotor unidirectional voltage detection module, described electromotor three-phase current detection module, described adjustment module pair
Should be connected with the input group of described microcomputer control panel；Described relay output module, described alarm, described numerical monitor
Module, described indicating lamp module correspondence are connected with the outfan group of described microcomputer control panel；Wherein, the unidirectional electricity of described electromotor
Each input of pressure detection module connects to corresponding electromotor unidirectional voltage input port, described electromotor three-phase current inspection
Each input surveying module is correspondingly connected to electromotor three-dimensional current input terminal mouth, and described DC-stabilized circuit connects respectively
Meet feeder ear, the feeder ear of described alarm, the feeder ear of described digital display module and the institute of described microcomputer control panel
State the feeder ear of indicating lamp module.
Preferably, described three-phase current detection module includes three identical current input circuits；Wherein, each described electricity
Stream input circuit includes: current transformer, bridge heap commutator and the first discharge circuit；The outfan of described current transformer and institute
The ac input end stating bridge heap commutator connects, and the DC output end of described bridge heap commutator is defeated with described first discharge circuit
Enter end to connect, the outfan of described first discharge circuit connects to one of the described input group of described microcomputer control panel
Input, the outfan of described first discharge circuit passes through a mu balanced circuit ground connection；Described electromotor three-dimensional current input terminal mouth
The input of the corresponding current transformer connecting each described current input circuit.
Preferably, described electromotor unidirectional voltage detection module includes: full-wave rectifying circuit and the second discharge circuit；Described
One voltage input end of motor unidirectional voltage input port is connected to described all wave rectification electricity by resistance r600, resistance r601
The input on road, another voltage input end of motor unidirectional voltage input port is connected to described complete by described resistance r601
The input of ripple rectification circuit, the outfan of described full-wave rectifying circuit connects to the input of described second discharge circuit, institute
The outfan stating the second discharge circuit passes through series resistance r606 and polar capacitor c600 ground connection, described resistance r606 and described pole
An input of the input group to described microcomputer control panel is connected between property electric capacity c600.
Preferably, described relay output module includes relay, and the coil-end of described relay passes through relay driving
Circuit connects an outfan of the described outfan group to described microcomputer control panel, and the tip side of described relay is all connected with
Contact protection circuit.
Preferably, described DC-stabilized circuit includes: transformator, full-wave rectifier filter circuit, direct current stabilizer, electricity
Capacitor filter circuit；Two inputs of described transformator pass through electric capacity c100, electric capacity c101 respectively and are grounded, and the two of described transformator
The corresponding input connecting described full-wave rectifier filter circuit of individual outfan, the outfan of described full-wave rectifier filter circuit is sequentially
Connect described direct current stabilizer and described capacitor filter.
Preferably, described direct current regulation circuit power supply includes: ac-dc power module, capacitor filter, DC voltage-stabilizing
Device, the first capacitor filter；It is described straight that the outfan of described ac-dc power module passes through electric capacity c107 and electric capacity c102 connection
The input of stream manostat, the outfan of described direct current stabilizer connects described capacitor filter.
The one or more technical schemes providing in this utility model embodiment, at least have the following technical effect that or excellent
Point:
This utility model passes through electromotor unidirectional voltage detection module, electromotor three-phase current detection module, adjustment module
Correspondence is connected with the input group of microcomputer control panel；Relay output module, alarm, digital display module, display lamp mould
Block correspondence is connected with the outfan group of microcomputer control panel, defines the intelligent overcurrent-overvoltage with microcomputer control panel as core
Protection device, solves prior art repeat circuit formula protection device for the low skill of the over-current over-voltage protection reliability of electromotor
Art problem, can integrate excessively stream, overvoltage, under-voltage protection and delays time to control, can replace the guarantor of traditional multiple relay completely
Shield pattern.
Electric moter voltage, current value can be shown by digital display module simultaneously, be easy to observe and operation, using very square
Just.
Brief description
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or in description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to the accompanying drawing providing.
Fig. 1 is the module map of electromotor overcurrent and overvoltage protector in this utility model embodiment；
Fig. 2 is the circuit structure diagram of a current input circuit in this utility model embodiment；
Fig. 3 is the circuit structure diagram of electromotor three-phase current detection module in this utility model embodiment；
Fig. 4 a～Fig. 4 c is the circuit structure diagram of this utility model embodiment repeat circuit output module；
Fig. 5 is the circuit structure diagram of DC-stabilized circuit in this utility model embodiment.
Specific embodiment
Purpose, technical scheme and advantage for making this utility model embodiment are clearer, new below in conjunction with this practicality
Accompanying drawing in type embodiment, is clearly and completely described it is clear that being retouched to the technical scheme in this utility model embodiment
The embodiment stated is a part of embodiment of this utility model, rather than whole embodiments.Based on the enforcement in this utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of not making creative work, broadly fall into
The scope of this utility model protection.
With reference to shown in Fig. 1, a kind of electromotor overcurrent and overvoltage protector that this utility model provides, comprising: micro computer controlled
Making sheet, electromotor unidirectional voltage detection module, electromotor three-phase current detection module, DC-stabilized circuit, relay are defeated
Go out module, alarm, digital display module, indicating lamp module and adjustment module.Electromotor unidirectional voltage detection module, electromotor
Three-phase current detection module, adjustment module correspondence are connected with the input group of microcomputer control panel；Relay output module, warning
Device, digital display module, indicating lamp module correspondence are connected with the outfan group of microcomputer control panel；Wherein, the unidirectional electricity of electromotor
Each input of pressure detection module connects to corresponding electromotor unidirectional voltage input port, electromotor three-phase current detection mould
Each input of block is correspondingly connected to electromotor three-dimensional current input terminal mouth, and DC-stabilized circuit connects micro computer respectively
The feeder ear of panel, the feeder ear of the feeder ear of alarm, the feeder ear of digital display module and indicating lamp module.
Specifically, three-phase current detection module includes three identical current input circuits, electromotor three-phase current mutual inductance
Device (nominal current 5a) outfan is corresponding to access three ports, three-phase current three identical current input circuits of corresponding input.
With reference to shown in Fig. 2, for example, a current input circuit includes: current transformer ua, bridge heap commutator u604 and the first fortune
Electric discharge road.The outfan of current transformer ua is connected with the ac input end of bridge heap commutator u604, bridge heap commutator u604's
DC output end is connected with the input of the first discharge circuit, and the outfan of the first discharge circuit connects to microcomputer control panel 1
One of input group input, the outfan of the first discharge circuit passes through a mu balanced circuit ground connection, electromotor three-dimensional electricity
The corresponding input connecting current transformer ua of one phase current input port of stream input port.More specifically, concrete one
In embodiment, the first discharge circuit includes amplifier u601d, the normal phase input end cross structure heap commutator of amplifier u601d
The positive output end of u604, the normal phase input end of amplifier u601d is grounded by electric capacity c605, and the outfan of amplifier u601d leads to
The resistance r623 crossing parallel connection is connected with resistance r624 to the inverting input of amplifier u601d, to provide negative feedback.Amplifier
The reverse input end of u601d pass through resistance r620, the negative output terminal of resistance r622 cross structure heap commutator u604, resistance r620 with
Resistance r622 indirectly.It is connected electricity between the normal phase input end of amplifier u601d and the negative-phase input of amplifier u601d
The outfan of resistance r622 and resistance r621, amplifier u601d accesses microcomputer control panel, amplifier u601d by resistance r625
Outfan by resistance r625 access microcomputer control panel.Specifically, mu balanced circuit is specially electric capacity c606 and voltage stabilizing two pole
Pipe d607 is in parallel.
It is connected with microcomputer control panel by above-mentioned electromotor three-phase current detection module such that it is able to pass through micro computer controlled
Making sheet controls, and sends when the arbitrary monophase current of electromotor three-phase current is continuously more than and sets overcurrent protection value the first setting time
Trip signal, now digital display module automatic switchback current value dispaly state, the maximum current value in display tripping operation moment, time delay
Automatically terminate trip signal after second setting time, exit malfunction, or malfunction is released by adjustment module.Excessively stream is protected
Shield is inverse time lag control mode: automatically changes the overcurrent delay trip time according to excessively stream degree, the more big then protection act of excessively stream
Faster.
Specifically, with reference to shown in Fig. 3, electromotor unidirectional voltage detection module includes: full-wave rectifying circuit and the second amplifier
Circuit；One voltage input end of motor unidirectional voltage input port is connected to all wave rectification by resistance r600, resistance r601
The input of circuit, another voltage input end of motor unidirectional voltage input port is connected to all wave rectification by resistance r601
The input of circuit, the outfan of full-wave rectifying circuit connects to the input of the second discharge circuit, the second discharge circuit defeated
Go out end by series resistance r606 and polar capacitor c600 ground connection, connect to micro computer between resistance r606 and polar capacitor c600
One input of the input group of panel.Specifically, in one embodiment, the second discharge circuit includes amplifier
The normal phase input end of u601a, amplifier u601a is grounded by resistance r602, and the reverse input end of amplifier u601a passes through resistance
R603 is grounded, and the outfan of amplifier u601a resistance r604, r605 in parallel feeds back to the reversely defeated of amplifier u601a
Enter end.Input voltage has two kinds of selections: one is 380v line voltage or the 220v phase voltage being introduced directly into electromotor, now connects
" 400v " and " com " two-port, by the input of resistance r600, resistance r601 to full-wave rectifying circuit；Two are introduced into nominally
The voltage transformer voltage of the electromotor of 100v, now connects " 100v " and " com " port, by resistance r601 to all wave rectification electricity
The input on road.
It is connected with microcomputer control panel by electromotor unidirectional voltage detection module, when generator voltage is higher than continuously to set
During overvoltage protection value three setting time, interrupted buzzing alerting tone is sent by siren, adjustment module is used for deleting buzzing announcement
Alert sound, indicating lamp module is used for indicating fault, digital display module automatic switchback magnitude of voltage dispaly state, and display in real time is now
Magnitude of voltage, relay output module action simultaneously, with send trip signal cut off electromotor voltage output.Time delay the 4th sets
After fixing time, if generator voltage recovers normal, automatically terminate trip signal, exit malfunction.Also can be by adjusting mould
Block exits malfunction in advance.Before under-voltage protection generator connecting in parallel with system, generator voltage is less than protector when setting under-voltage protection value
It is in fault warning state, do not allow grid-connected combined floodgate.Malfunction is automatically exited from after generator voltage is normal.
Specifically, with reference to shown in Fig. 4 a, Fig. 4 b and Fig. 4 c, relay output module includes: relay k501, relay
The coil-end of k501 connects an outfan of the outfan group to microcomputer control panel, relay by relay drive circuit
The tip side of k501 is respectively connected with contact protection circuit.In one embodiment, relay drive circuit includes diode
D501, audion q501, resistance r500, r501 and electric capacity c501, wherein, the emitter stage of audion q501 connects relay k501
A coil-end, it is indirectly that the base stage of audion q501 meets 5v, resistance r500 and resistance r501 by resistance r500, resistance r501
Enter the outfan group of microcomputer control panel, the colelctor electrode of audion q501 connects another line of relay k501 by electric capacity c501
Circle end, a coil termination voltage 12v of relay k501, another coil-end ground connection, relay k501 can select often as needed
Open or normally closed interface, relay k501 is output as passive switch signal, when microcomputer control panel sends fault-signal, relay
The opened point closure of k501, the normally closed point of relay k501 then disconnects.Further, when loading outside as exchanging, in relay
The coil two ends of a device k501 ac capacitor being not less than 0.1uf in parallel, loads as one diode of inverse parallel during direct current.
With reference to shown in Fig. 5, in one embodiment, DC-stabilized circuit includes: transformator t101, full-wave rectifier filter
Circuit and direct current stabilizer u101, capacitor filter.Two inputs of transformator t101 pass through electric capacity c100, electric capacity respectively
C101 is grounded, the corresponding input connecting full-wave rectifier filter circuit of two outfans of transformator t101, full-wave rectifier filter
The outfan of circuit is sequentially connected with direct current stabilizer u101 and capacitor filter.In one embodiment, all wave rectification filter
Wave circuit is made up of d101, d102, d103 and d104, and the capacitor filter in the present embodiment is polar capacitor c103, electric capacity
C104, electric capacity c105 and c106 are formed in parallel.In another embodiment, direct current regulation circuit power supply includes: ac-dc power supply mould
Block, capacitor filter, direct current stabilizer and the first capacitor filter；The outfan of ac-dc power module passes through electric capacity
C107 and electric capacity c102 connects the input of direct current stabilizer, and the outfan of direct current stabilizer connects capacitor filter, specifically
, capacitor filter in the present embodiment is polar capacitor c103, electric capacity c104, electric capacity c105, c106 are formed in parallel.In conjunction with
Dual-purpose using realizing AC and DC.
Specifically, the circuit of realizing of alarm, digital display module and indicating lamp module may be referred to prior art, in order to
Description succinct, repeat no more herein.Specifically, adjustment module includes parameter regulation key, increases key and reduce key, and parameter is adjusted
Section key is used for entering parameter adjustment, increases key and reduces key for entering the increase and decrease of parameter adjustment laggard line parameter.
Although having been described for preferred embodiment of the present utility model, those skilled in the art once know substantially
Creative concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to wrap
Include preferred embodiment and fall into being had altered and changing of this utility model scope.
Obviously, those skilled in the art can carry out various changes and modification without deviating from this practicality to this utility model
New spirit and scope.So, if of the present utility model these modification and modification belong to this utility model claim and
Within the scope of its equivalent technologies, then this utility model is also intended to comprise these changes and modification.
Claims (6)
1. a kind of electromotor overcurrent and overvoltage protector is it is characterised in that include: microcomputer control panel, electromotor unidirectional voltage
Detection module, electromotor three-phase current detection module, DC-stabilized circuit, relay output module, alarm, numeral is aobvious
Show module, indicating lamp module, adjustment module；
Described electromotor unidirectional voltage detection module, described electromotor three-phase current detection module, described adjustment module corresponding with
The input group of described microcomputer control panel connects；
Described relay output module, described alarm, described digital display module, described indicating lamp module correspondence are micro- with described
The outfan group of computer control panel connects；
Wherein, each input of described electromotor unidirectional voltage detection module connects to the input of corresponding electromotor unidirectional voltage
Port, each input of described electromotor three-phase current detection module is correspondingly connected to electromotor three-dimensional current input terminal mouth,
Described DC-stabilized circuit connects the feeder ear of the described microcomputer control panel, feeder ear of described alarm, described respectively
The feeder ear of digital display module and the feeder ear of described indicating lamp module.
2. electromotor overcurrent and overvoltage protector as claimed in claim 1 is it is characterised in that described three-phase current detection module
Including three identical current input circuits；
Wherein, each described current input circuit includes: current transformer, bridge heap commutator and the first discharge circuit；
The outfan of described current transformer is connected with the ac input end of described bridge heap commutator, described bridge heap commutator straight
Stream outfan is connected with the input of described first discharge circuit, and the outfan of described first discharge circuit connects to described micro- electricity
One of the described input group of brain panel input, the outfan of described first discharge circuit is connect by a mu balanced circuit
Ground；
The input of the corresponding current transformer connecting each described current input circuit of described electromotor three-dimensional current input terminal mouth
End.
3. electromotor overcurrent and overvoltage protector as claimed in claim 1 is it is characterised in that described electromotor unidirectional voltage is examined
Survey module to include: full-wave rectifying circuit and the second discharge circuit；
One voltage input end of described motor unidirectional voltage input port is connected to described complete by resistance r600, resistance r601
The input of ripple rectification circuit, another voltage input end of motor unidirectional voltage input port passes through described resistance r601 and connects
To the input of described full-wave rectifying circuit, the outfan of described full-wave rectifying circuit connects defeated to described second discharge circuit
Enter end, the outfan of described second discharge circuit passes through series resistance r606 and polar capacitor c600 ground connection, described resistance r606
An input of the input group to described microcomputer control panel is connected and described polar capacitor c600 between.
4. electromotor overcurrent and overvoltage protector as claimed in claim 1 is it is characterised in that described relay output module bag
Include relay, the coil-end of described relay is connected by relay drive circuit to the described output of described microcomputer control panel
One outfan of end group, the tip side of described relay is all connected with contact protection circuit.
5. electromotor overcurrent and overvoltage protector as claimed in claim 1 is it is characterised in that described DC-stabilized circuit
Including: transformator, full-wave rectifier filter circuit, direct current stabilizer, capacitor filter；
Two inputs of described transformator pass through electric capacity c100, electric capacity c101 respectively and are grounded, two outputs of described transformator
The corresponding input connecting described full-wave rectifier filter circuit in end, the outfan of described full-wave rectifier filter circuit is sequentially connected with institute
State direct current stabilizer and described capacitor filter.
6. electromotor overcurrent and overvoltage protector as claimed in claim 1 is it is characterised in that described direct current regulation circuit power supply
Including: ac-dc power module, capacitor filter, direct current stabilizer, the first capacitor filter；
The outfan of described ac-dc power module passes through the input that electric capacity c107 and electric capacity c102 connects described direct current stabilizer
End, the outfan of described direct current stabilizer connects described capacitor filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620840758.0U CN205921366U (en) | 2016-08-04 | 2016-08-04 | Send out motor over -current overvoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620840758.0U CN205921366U (en) | 2016-08-04 | 2016-08-04 | Send out motor over -current overvoltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205921366U true CN205921366U (en) | 2017-02-01 |
Family
ID=57871427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620840758.0U Active CN205921366U (en) | 2016-08-04 | 2016-08-04 | Send out motor over -current overvoltage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205921366U (en) |
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2016
- 2016-08-04 CN CN201620840758.0U patent/CN205921366U/en active Active
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| GR01 | Patent grant |