CN207150153U - High-pressure liquid integrates soft starting overload protection system - Google Patents
High-pressure liquid integrates soft starting overload protection system Download PDFInfo
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- CN207150153U CN207150153U CN201721252399.8U CN201721252399U CN207150153U CN 207150153 U CN207150153 U CN 207150153U CN 201721252399 U CN201721252399 U CN 201721252399U CN 207150153 U CN207150153 U CN 207150153U
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Abstract
High-pressure liquid of the present utility model integrates soft starting overload protection system; transient voltage signal suppression circuit, immediate current suppression circuit connection simulation multiplication circuit; simulate multiplication circuit connection overload protecting circuit; effectively solves the overload protection system of current high-pressure liquid soft start; the voltage of collection, current signal be inaccurate and protection device is slow in reacting during overload, the problem of damaging.The utility model is simple in construction, the rated current signal drawn after the nominal voltage signal that draws suppresses collection with immediate current after the voltage signal of voltage sensor collection is inhibited current signal is inhibited carries out simulation and is multiplied to draw power signal, improves the accuracy of signal acquisition；Triode Q1, Q2 are turned on when power signal exceedes nominal power signal; overload relay obtains electric, the automatic self-lock switch disconnected in motor start-up circuit, progress overload protection; controller data processing time length is shortened, overload protection device is effectively controlled.
Description
Technical field
It the utility model is related to overload detection technical field, particularly high-pressure liquid synthesis soft starting overload protection system
System.
Background technology
The overload protection system of high-pressure liquid soft start at present, it is electronic using voltage transformer, current transformer collection
Voltage, electric current during machine bringing onto load send controller to, are calculated, analyzed by controller, judging to adjust the electricity in motor running
Pressure, electric current start overload protection system, on the one hand have instant high-voltage in soft start, cause voltage, the electric current of collection
Signal is inaccurate, on the other hand needs controller to calculate, analysis judges, data processing time length, it is impossible to effective to overload
Monitoring, processing, protection device is slow in reacting when causing overload, damages.
Therefore the utility model provides a kind of new scheme to solve this problem.
Utility model content
In view of the deficienciess of the prior art, the utility model purpose is to provide high-pressure liquid synthesis soft starting overload
Protection system, effectively solves the overload protection system of current high-pressure liquid soft start, and the voltage of collection, current signal are not
Protection device is slow in reacting during accurate and overload, the problem of damaging.
To achieve these goals, the utility model is to realize by the following technical solutions：Believe including transient voltage
Number suppression circuit, immediate current suppression circuit, simulation multiplication circuit, overload protecting circuit, it is characterised in that transient voltage is believed
Number suppression circuit, immediate current suppression circuit connection simulation multiplication circuit, simulation multiplication circuit connection overload protecting circuit；
Transient voltage signal suppression circuit includes voltage transformer H2, and voltage transformer H2 pin 2 connects resistance R3's
One end, the resistance R3 other end connect diode D1 positive pole, voltage-stabiliser tube ZD1 negative pole, diode D1 negative pole difference respectively
Multiplier IC1 pin 1, voltage-stabiliser tube ZD2 negative pole is connected, voltage-stabiliser tube ZD1 positive pole and voltage-stabiliser tube ZD2 positive pole, voltage are mutual
Sensor H2 pin 1 is all connected with ground；
Immediate current suppression circuit includes current transformer H1, and current transformer H1 pin 2 connects resistance R1's respectively
One end, electric capacity C1 one end diode D2 positive pole, metal-oxide-semiconductor 1GBT1 source electrodes, the resistance R1 other end, the electric capacity C1 other end,
Metal-oxide-semiconductor 1GBT1 grids are all connected with resistance R2 one end, and resistance R2 other end summation current transformer H1 pin 1 connects ground,
Metal-oxide-semiconductor 1GBT1 drain electrodes connect diode D2 negative pole, multiplier IC1 pin 6 respectively.
Preferably, overload protecting circuit includes triode Q1, triode Q1 base stage connect respectively resistance R6 one end,
Electric capacity C3 one end, the resistance R5 other end, the resistance R6 other end connect ground, triode Q1 hair with the electric capacity C3 other end
Emitter-base bandgap grading difference connecting triode Q2 emitter stage, grounding resistance R8 one end, the one of triode Q1 colelctor electrode connection resistance R9
End, resistance R9 other end difference connecting triode Q2 base stage, resistance R7 one end, resistance R7 other end connection power supply+
24V, triode Q2 colelctor electrode connection diode D2 positive pole, one end of overload relay K1 coils, diode D2 negative pole
Power supply+24V is connected with the other end of overload relay K1 coils, overload relay K1 normally-closed contact string is opened in soft start self-locking
In powered-down road；
The simulation multiplication circuit includes multiplier IC1, and multiplier IC1 pin 2 connects power supply+15V, multiplier IC1
Pin 5 connect power supply -15V, multiplier IC1 pin 7, pin 8, pin 9, the connection of pin 10 ground, multiplier IC1 pin
3 connect multiplier IC1 pin 4, resistance R4 one end respectively, and the resistance R4 other end connects electric capacity C2 one end, electricity respectively
R5 one end, electric capacity C5 other end connection ground are hindered, the resistance R5 other end connects voltage-stabiliser tube ZD3 positive pole, voltage-stabiliser tube respectively
ZD4 negative pole, voltage-stabiliser tube ZD3 negative pole connection power supply+15V, voltage-stabiliser tube ZD4 positive pole connection ground.
The utility model is simple in construction, when drawing motor bringing onto load after the voltage signal that voltage sensor gathers is inhibited
Nominal voltage signal and immediate current suppress collection current signal it is inhibited after specified electricity when drawing motor bringing onto load
Stream signal carries out simulation multiplication and draws power signal, improves the accuracy of signal acquisition；Power signal is believed more than rated power
Number when triode Q1, Q2 conducting, overload relay obtains electric, the automatic self-lock switch disconnected in motor start-up circuit, carries out
Load is protected, and is shortened controller data processing time length, overload protection device is effectively controlled.
Brief description of the drawings
Fig. 1 is the utility model circuit link block figure.
Fig. 2 is the utility model circuit catenation principle figure.
Embodiment
For about of the present utility model foregoing and other technology contents, feature and effect, it is following coordinate with reference to figures 1 through
Fig. 2 is in the detailed description of embodiment, can clearly present.The structure content being previously mentioned in following examples, it is to say
Bright book accompanying drawing is reference.
Each exemplary embodiment of the present utility model is described below with reference to accompanying drawings.
Embodiment one, high-pressure liquid synthesis soft starting overload protection system, electricity in transient voltage signal suppression circuit
Nominal voltage signal and immediate current when drawing motor bringing onto load after the voltage signal of pressure sensor collection is inhibited suppress
Show that rated current signal circuit during motor bringing onto load is sent to simulation multiplication circuit after the current signal of collection is inhibited, enter
Row simulation multiplication draws power signal, into overload protecting circuit, triode Q1 when power signal exceedes nominal power signal,
Q2 is turned on, and overload relay obtains electric, the automatic self-lock switch disconnected in motor start-up circuit, progress overload protection；Moment
Voltage signal suppression circuit is used to draw the voltage signal of voltage sensor collection after inhibited volume during motor bringing onto load
Determining voltage signal, including voltage transformer H2, the voltage signal that voltage transformer H2 pin 2 exports connect resistance R3, two poles
Pipe D1 positive pole, voltage-stabiliser tube ZD1, the transient voltage suppression circuit of voltage-stabiliser tube ZD2 compositions, when instant high-voltage, voltage-stabiliser tube ZD1
It is forced the energy of absorption motor, voltage-stabiliser tube ZD2 further absorbs the backward multiplier IC1 output voltage signal of pin 1, works as electricity
The output voltage signal of pin 1 when pressure is stable through resistance R3, from diode D1 to multiplier IC1；Immediate current suppression circuit is by electricity
Rated current signal when drawing motor bringing onto load after the current signal of flow sensor collection is inhibited, including current transformer
The current signal that H1, current transformer H1 pin 2 export connects resistance R1, resistance R2, electric capacity C1, metal-oxide-semiconductor 1GBT1 and formed
Transient current suppression circuit, when instantaneous high current, metal-oxide-semiconductor 1GBT1 conductings, resistance R1, resistance R2, electric capacity C1 absorb motor
Energy after to multiplier IC1 the output current signal of pin 6, when electric current is stable through diode D2 drawing to multiplier IC1
The output current signal of pin 1.
Embodiment two, on the basis of embodiment one, overload protecting circuit is used for power signal to be believed more than rated power
Number when triode Q1, Q2 conducting, overload relay obtains electric, the automatic self-lock switch disconnected in motor start-up circuit, carries out
Load is protected, including triode Q1, and power signal is added to triode Q1 base stage after resistance R6, electric capacity C3 filtering, due to three
Pole pipe Q1 emitter stage connects ground, triode Q1 conductings, triode Q2 emitter stage with triode Q2 emitter stage through resistance R8
Voltage is resistance R7, the voltage on the resistance R8 of the bleeder circuit of resistance R8, resistance R9 composition, triode Q2 base voltage
For resistance R7, resistance R8, resistance R9 composition bleeder circuit resistance R8, resistance R9 on voltage, now triode Q2
Emitter junction adds forward bias, triode Q2 conductings, and overload relay K1 coils obtain electric, go here and there the mistake in soft start self-locking switch circuit
The normally-closed contact for carrying relay K1 disconnects, and motor stall, carries out overload protection；The simulation multiplication circuit is used for will
Voltage, current signal simulation multiplication draw power signal, including multiplier IC1, and multiplier IC1 pin 2 connects power supply+15V,
Multiplier IC1 pin 5 connects power supply -15V, multiplier IC1 pin 7, pin 8, pin 9, the connection of pin 10 ground, multiplier
The power output signal of pin 4 that IC1 pin 3 connects multiplier IC1 respectively limits through resistance R4 and electric capacity C2 filtering, resistance R5
Triode Q1 base stage is sent to after stream, voltage-stabiliser tube ZD3 and voltage-stabiliser tube ZD4 clampers.
The utility model is when being used, the voltage signal of voltage transformer H2 collections, through resistance R3, diode
D1 positive pole, voltage-stabiliser tube ZD1, the transient voltage suppression circuit of voltage-stabiliser tube ZD2 compositions, when drawing motor bringing onto load after suppression
Nominal voltage signal, to the multiplier IC1 output voltage signal of pin 1；The current signal of current transformer H1 collections is through resistance
The transient current suppression circuit that R1, resistance R2, electric capacity C1, metal-oxide-semiconductor 1GBT1 are formed draws volume during motor bringing onto load after suppressing
Determine current signal, to the multiplier IC1 output current signal of pin 1, simulation multiplication draws power signal, resistance R4 and electric capacity C2
Triode Q1 base is added to after filtering, resistance R5 current limlitings, voltage-stabiliser tube ZD3 and voltage-stabiliser tube ZD4 clampers, resistance R6, electric capacity C3 filtering
Pole, because triode Q1 emitter stage and triode Q2 emitter stage through resistance R8 connect ground, triode Q1 conductings, triode Q2
Emitter voltage for resistance R7, resistance R8, resistance R9 composition bleeder circuit resistance R8 on voltage, triode Q2's
Base voltage is resistance R7, the voltage on resistance R8, the resistance R9 of the bleeder circuit of resistance R8, resistance R9 composition, now three
Pole pipe Q2 emitter junction adds forward bias, triode Q2 conductings, and overload relay K1 coils obtain electric, go here and there in soft start self-lock switch
Overload relay K1 normally-closed contact disconnects in circuit, motor stall, carries out overload protection.
Described above is to combine embodiment further detailed description of the utility model, it is impossible to assert this
Utility model specific implementation is limited only to this；For belonging to the utility model and for those skilled in the technology concerned,
The expansion made under the premise of technical solutions of the utility model thinking and operating method, the replacement of data, should all fall
Within scope of protection of the utility model.
Claims (2)
1. high-pressure liquid integrates soft starting overload protection system, including the suppression of transient voltage signal suppression circuit, immediate current
Circuit processed, simulation multiplication circuit, overload protecting circuit, it is characterised in that transient voltage signal suppression circuit, immediate current suppression
Circuit connection simulation multiplication circuit processed, simulation multiplication circuit connection overload protecting circuit；
Transient voltage signal suppression circuit includes voltage transformer H2, and voltage transformer H2 pin 2 connects resistance R3 one end,
The resistance R3 other end connects diode D1 positive pole, voltage-stabiliser tube ZD1 negative pole respectively, and diode D1 negative pole connects respectively to be multiplied
Musical instruments used in a Buddhist or Taoist mass IC1 pin 1, voltage-stabiliser tube ZD2 negative pole, voltage-stabiliser tube ZD1 positive pole and voltage-stabiliser tube ZD2 positive pole, voltage transformer H2
Pin 1 be all connected with ground；
Immediate current suppression circuit includes current transformer H1, current transformer H1 pin 2 connect respectively resistance R1 one end,
Electric capacity C1 one end diode D2 positive pole, metal-oxide-semiconductor 1GBT1 source electrodes, the resistance R1 other end, the electric capacity C1 other end, metal-oxide-semiconductor
1GBT1 grids are all connected with resistance R2 one end, the resistance R2 other end summation current transformer H1 connection of pin 1 ground, metal-oxide-semiconductor
1GBT1 drain electrodes connect diode D2 negative pole, multiplier IC1 pin 6 respectively.
2. high-pressure liquid according to claim 1 integrates soft starting overload protection system, it is characterised in that overload
Protection circuit includes triode Q1, and triode Q1 base stage connects resistance R6 one end, electric capacity C3 one end, resistance R5 respectively
The other end, the resistance R6 other end connect ground, triode Q1 emitter stage difference connecting triode Q2 with the electric capacity C3 other end
Emitter stage, grounding resistance R8 one end, triode Q1 colelctor electrode connection resistance R9 one end, resistance R9 other end difference
Connecting triode Q2 base stage, resistance R7 one end, resistance the R7 other end connection power supply+24V, triode Q2 colelctor electrode connect
Connect diode D2 positive pole, one end of overload relay K1 coils, diode D2 negative pole and overload relay K1 coils it is another
One end connects power supply+24V, and overload relay K1 normally-closed contact string is in soft start self-locking switch circuit；
The simulation multiplication circuit includes multiplier IC1, and multiplier IC1 pin 2 connects power supply+15V, and multiplier IC1's draws
Pin 5 connects power supply -15V, multiplier IC1 pin 7, pin 8, pin 9, the connection of pin 10 ground, and multiplier IC1 pin 3 divides
Not Lian Jie multiplier IC1 pin 4, resistance R4 one end, the resistance R4 other end connects electric capacity C2 one end, resistance R5 respectively
One end, electric capacity C5 other end connection ground, the resistance R5 other end connects voltage-stabiliser tube ZD3 positive pole, voltage-stabiliser tube ZD4 respectively
Negative pole, voltage-stabiliser tube ZD3 negative pole connection power supply+15V, voltage-stabiliser tube ZD4 positive pole connection ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721252399.8U CN207150153U (en) | 2017-09-27 | 2017-09-27 | High-pressure liquid integrates soft starting overload protection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721252399.8U CN207150153U (en) | 2017-09-27 | 2017-09-27 | High-pressure liquid integrates soft starting overload protection system |
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| CN207150153U true CN207150153U (en) | 2018-03-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109305051A (en) * | 2018-09-28 | 2019-02-05 | 上汽通用五菱汽车股份有限公司 | Control method, power mechanism, electric vehicle and the readable storage medium storing program for executing of motor |
-
2017
- 2017-09-27 CN CN201721252399.8U patent/CN207150153U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109305051A (en) * | 2018-09-28 | 2019-02-05 | 上汽通用五菱汽车股份有限公司 | Control method, power mechanism, electric vehicle and the readable storage medium storing program for executing of motor |
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