CN207039169U - Motor stator exception loss protecting device based on chip microcontroller - Google Patents
Motor stator exception loss protecting device based on chip microcontroller Download PDFInfo
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- CN207039169U CN207039169U CN201720824520.3U CN201720824520U CN207039169U CN 207039169 U CN207039169 U CN 207039169U CN 201720824520 U CN201720824520 U CN 201720824520U CN 207039169 U CN207039169 U CN 207039169U
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Abstract
Motor stator exception loss protecting device based on chip microcontroller,Prior art is overcome only to be acquired motor operation signal and current signal,The problem of motor stator exception dead electricity reason can not be judged comprehensively,It is characterized in the power module that single-chip microcomputer is provided with circuit board and is connected with single-chip microcomputer,Running status input circuit,Outputting circuit for relay,Current collection circuit,Voltage collection circuit,Frequency measurement circuit and the display being bi-directionally connected by serial communication bus and single-chip microcomputer,Button and condition indication circuit,Beneficial effect is by using single-chip microcomputer and input switch amount and analog quantity acquisition circuit,Electric current is included to motor stator exception dead electricity Producing reason,Voltage,Frequency and control logic have carried out comprehensive judgement,Avoid in power failure system exception from working and possess the failure and special detection function of drive motor contactor main contacts adhesion,Disjunction instruction is provided for the total protection circuit of crane,Failure propagation can effectively be prevented.
Description
Technical field
The utility model belongs to hoisting mechanism for cranes for metallurgy use motor protection technique field, more particularly to based on monolithic
The motor stator exception loss protecting device that machine is realized.
Background technology
《TSG Q0002-2008 hoisting machinery safety and technical supervision codes》、《TSG Q7015-2016 hoisting machineries are regular
Inspection rule》With《TSG Q7016-2016 hoisting machineries installation transformation repair of a major character supervision and inspection rule》Series inspection rule issue
Afterwards, to the lifting mechanism of handling molten metal crane, it is desirable to set motor stator exception loss protecting.《Rubber tyre gantry crane design
Specification》Also provide, jack machinism motor should set stator exception loss protecting function, when arrangements for speed regulation or forward and reverse contactor
When failure causes motor out of control, brake should band-type brake immediately.At present, this function is largely to use universal motor protection
Device JD-5, JD-6 series realize defencive function in short term using the break-make of power supply, the skill that the universal motor protector uses
Art scheme is to determine whether that electric current flows through motor winding so as to realize using the triggering of NE556 dual time base circuits, reset level
Defencive function, the problem of existing are the places that may not apply to Fraquent start, and do not have self-checking function, for bridge motor stator
, can not failure judgement reason in the case of abnormal dead electricity, it is impossible to long-term protection is provided, not prompted after losing defencive function, nothing
Fault alarm information and store function.A kind of disclosure of the invention of Application No. 201110246911.9 " digitized motor
Comprehensive protection device ", the invention include motor operation signal detection circuit, current transformer, current converter circuit；Connection electricity respectively
Machine run signal detects circuit and current converter circuit, and the letter that circuit and current converter circuit are passed back is detected to motor operation signal
Number CPU handled；CPU is connected, the control signal that CPU is sent is rung
The control output relay and failure output relay answered；Characterized by further comprising：CPU is connected, to centre
The abnormal output relay that higher level's motor circuit open command that reason unit is sent is responded；The abnormal output relay institute
The contact of control is arranged in higher level's motor circuit.But invention the problem of existing is that motor abnormality Producing reason is protected
That protects is not comprehensive, and only motor operation signal and current signal are gathered, motor driven systems supply voltage do not lacked
Phase, phase sequence and under-voltage, over-pressed situation are judged, also without the state of collection lifting electric motor brake control, it is impossible to
The reason for judging motor stator exception dead electricity comprehensively.
The content of the invention
Technical problem to be solved in the utility model is to overcome the shortcomings of the prior art and defect, there is provided a kind of
It can judge that the motor based on chip microcontroller for metallurgical bridge motor of motor stator exception dead electricity reason is determined comprehensively
The abnormal loss protecting device of son.
Technical scheme provided by the utility model includes electrical equipment box base and electrical equipment box cover, in electrical equipment box base and electrical equipment
Circuit board is installed between box cover, be provided with the circuit board single-chip microcomputer and the power module being connected with single-chip microcomputer,
Running status input circuit, outputting circuit for relay, current collection circuit, voltage collection circuit, frequency measurement circuit and pass through
It has been shown that, button and the condition indication circuit that serial communication bus is bi-directionally connected with single-chip microcomputer.
The current collection circuit includes current transformer, the first operational amplifier, the second operational amplifier, first adopted
Sample resistance, the first current-limiting resistance and filter capacitor and single-chip microcomputer first interface, wherein current transformer obtain motor current signal,
The voltage signal proportional to current of electric is obtained by the first sampling resistor, then is connected through the first current-limiting resistance and filter capacitor
To the input of the first operational amplifier, the port of the output end connection single-chip microcomputer first interface of the first operational amplifier.
The voltage collection circuit includes voltage transformer, the second current-limiting resistance, the second sampling resistor, the 3rd computing are put
Big device, the 3rd current-limiting resistance, the first optocoupler, single-chip microcomputer second interface and the interface of single-chip microcomputer the 3rd, wherein supply voltage pass through the
Two current-limiting resistances are connected to voltage transformer primary side, and voltage transformer secondary connects the second sampling resistor, and the second sampling resistor connects
The input of the 3rd operational amplifier is connected to, the output end of the 3rd operational amplifier is connected to the port of the interface of single-chip microcomputer the 3rd,
Supply voltage accesses the first optocoupler after the 3rd current-limiting resistance current limliting simultaneously, and single-chip microcomputer second is connected to after the first light-coupled isolation
The port of interface.
The frequency measurement circuit includes the second order being made up of single order resistance, second order resistance, single order electric capacity and second order capacitance
Filter circuit, by the first voltage-stabiliser tube and the second regulator tube group into voltage limiter circuit and comparator, the second optocoupler and single-chip microcomputer
The rotor of the input termination winding motors of four interfaces, wherein second-order filter circuit, output end are connected to ratio through voltage limiter circuit
Compared with the input of device, the input of output the second optocoupler of termination of comparator, the output end connection single-chip microcomputer the 4th of the second optocoupler
The port of interface.
Compared with prior art, the beneficial effects of the utility model are：By using single-chip microcomputer and input switch amount and
Analog quantity acquisition circuit, motor stator exception dead electricity Producing reason is carried out including electric current, voltage, frequency and control logic
It is comprehensive to judge, the stator exception dead electricity of design specification, inspection rule requirement is realized by single-chip microcomputer comprehensive operational analysis
Defencive function, and possess the failure and special detection function of drive motor contactor main contacts adhesion, always protect electricity for crane
Road provides disjunction instruction, can effectively prevent failure propagation.
Compared with prior art, the beneficial effects of the utility model are in particular in：
First, the supply voltage of drive system and the phase sequence of three phase mains that are obtained by three groups of voltage collection circuits, are going out
Provided protection against during the power failure of existing over-pressed, under-voltage, decompression or phase sequence mistake, avoid the system exception work in power failure
Make；
Second, the running state information of drive system is obtained by running status input circuit, including drive motor contact
Auxiliary contact state, the auxiliary contact state of motor brake contactor and the open and-shut mode of motor brake of device, it is single
Piece machine carries out logic analysis according to port status, when the contactor of drive motor obtain electric and brake not it is electric or drive electronic
When the contactor dead electricity of machine and brake do not power off, single-chip microcomputer disconnects drive system control loop by relay, realizes positive and negative
When causing motor out of control to contactor failure, brake band-type brake function immediately；It can interpolate that by running status input circuit
The contactor main contacts scaling loss adhesion fault of drive motor, now single-chip microcomputer pass through outputting circuit for relay, disconnect crane
Total protection circuit control power supply, so as to disconnect electric motor drive system main circuit power, effectively prevents failure propagation.
Third, the rotating speed of motor is calculated by the frequency measurement circuit of winding motors rotor, the motor with setting
Rated speed is compared, and when motor actual speed exceeds limits value, single-chip microcomputer is disconnected and driven by outputting circuit for relay
Dynamic system control loop, realizes Motor Over Speed defencive function.
Brief description of the drawings
Below by accompanying drawing, the utility model is described in further detail,
Fig. 1 is structural decomposition diagram of the present utility model,
Fig. 2 is circuit-board laying-out schematic diagram of the present utility model,
Fig. 3 is panel schematic diagram of the present utility model,
Fig. 4 is circuit structure block diagram of the present utility model,
Fig. 5 is current collection circuit schematic diagram of the present utility model,
Fig. 6 is voltage collection circuit schematic diagram of the present utility model,
Fig. 7 is frequency measurement circuit schematic diagram of the present utility model.
In figure：
1. electrical equipment box base, 2. screws,
3. circuit board,
3-1. power modules, 3-2. running status input circuits,
3-3. outputting circuit for relay, 3-4. current collection circuits,
3-5. voltage collection circuits, 3-6. frequency measurement circuits,
3-7. single-chip microcomputer（MCU）, 3-8. serial communication bus,
3-9. is shown, button and condition indication circuit；
4. electrical equipment box cover,
5. radiator window, 6. panels,
7. button, 8.LCD display screens,
9. status indicator lamp, 10. portable adjusting windows, 11. baffle plates.
Embodiment
As shown in Figure 1 to 4, the technical solution adopted in the utility model includes electrical equipment box base 1 and electrical equipment box cover 4,
Circuit board receiving space is formed between electrical equipment box base 1 and electrical equipment box cover 4, between electrical equipment box base 1 and electrical equipment box cover 4
Circuit board 3 is installed, electrical equipment box base 1 is fixedly connected with electrical equipment box cover 4 with screw 2, the left and right two of the electrical equipment box cover 4
Side is provided with radiator window 5, and panel 6 is provided with the upper surface of electrical equipment box cover 4, and one group of button 7, LCD are provided with panel 6 and is shown
Display screen 8 and status indicator lamp 9, there be portable adjusting window 10 and baffle plate 11 in both sides on panel 6；Pacify on the circuit board 3
Equipped with single-chip microcomputer（MCU）3-7 and and single-chip microcomputer（MCU）The power module 3-1 of 3-7 connections, running status input circuit 3-2,
Outputting circuit for relay 3-3, current collection circuit 3-4, voltage collection circuit 3-5, frequency measurement circuit 3-6 and by serially leading to
Interrogate bus 3-8 and single-chip microcomputer（MCU）It has been shown that, button and the condition indication circuit 3-9 that 3-7 is bi-directionally connected；
Fig. 5 is current collection circuit 3-4 schematic diagrams of the present utility model.As shown in figure 5, current acquisition of the present utility model
Circuit 3-4 includes current transformer U201, the first operational amplifier U202A, the second operational amplifier U202B, the first sampling
Resistance R201, the first current-limiting resistance R202 and filter capacitor C203 and single-chip microcomputer first interface AN1, wherein current transformer U201
Motor current signal is obtained, the voltage signal proportional to current of electric is obtained by the first sampling resistor R201, then through first
After current-limiting resistance R202, filter capacitor C203 and the first operational amplifier U202A are handled, pass through single-chip microcomputer first interface AN1's
Port is sampled, and the digital quantity current data of motor is obtained after AD conversion inside single-chip microcomputer 3-7.
Fig. 6 is voltage collection circuit 3-5 schematic diagrams of the present utility model.As shown in fig. 6, voltage acquisition of the present utility model
Circuit 3-5 includes voltage transformer T900, the second current-limiting resistance R902, the second sampling resistor R905, the 3rd operational amplifier
U902A, the 3rd current-limiting resistance R900, the first optocoupler U900, single-chip microcomputer second interface INT0 and the interface ANO of single-chip microcomputer the 3rd, its
Middle supply voltage is connected to voltage transformer T900 primary sides, the connection of voltage transformer T900 secondary by the second current-limiting resistance R902
The second sampling resistor R905 obtain the sampled voltage directly proportional to supply voltage, the second sampling resistor R905 is connected to the 3rd and transported
Amplifier U902A input is calculated, the interface ANO of single-chip microcomputer the 3rd end is connected to after the 3rd operational amplifier U902A processing
Mouthful, single-chip microcomputer 3-7 is by obtaining digital quantity voltage data after internal AD conversion；Supply voltage is through the 3rd current-limiting resistance R900 simultaneously
The first optocoupler U900 is accessed, single-chip microcomputer 3-7 is accessed by single-chip microcomputer second interface INT0 port after the first optocoupler U900 isolation,
Voltage zero-crossing signal is caught by single-chip microcomputer 3-7, judges the phase order relation of power supply.
Fig. 7 is winding motors rotor frequency measuring circuit 3-6 schematic diagrams of the present utility model.As shown in fig. 7, this practicality
New frequency measurement circuit 3-6 is by single order resistance R500, second order resistance R501, single order electric capacity C501 and second order capacitance C502 groups
Into second-order filter circuit, voltage limiter circuit and comparator formed by the first voltage-stabiliser tube D500 and the second voltage-stabiliser tube D501
U500, the second optocoupler U501 and the interface IC1 of single-chip microcomputer the 4th, wherein second-order filter circuit input termination winding motors turn
Son, output end are connected to comparator U500 input through voltage limiter circuit, and comparator U500 output terminates the second optocoupler
U501 input, produced after the second optocoupler U501 isolation with rotor frequency identical circuit and square-wave by the interface of single-chip microcomputer the 4th
IC1 port access single-chip microcomputer 3-7, frequency values are calculated by single-chip microcomputer 3-7.
In use, in protection device after electricity, first by single-chip microcomputer 3-7 to running status input circuit 3-2, current acquisition electricity
Road 3-4, voltage collection circuit 3-5 and frequency measurement circuit 3-6 carry out signal acquisition, analog signalses through single-chip microcomputer 3-7 inside
After AD conversion, single-chip microcomputer 3-7 carries out logic analysis, calculation process according to on-off state, simulation numerical quantity, judges whether
Power supply breaks phase, misphase failure, such as without exception, by outputting circuit for relay set working relay, working relay it is normally opened
Contact closure, the control power supply of electric motor drive system is connected, the condition for possessing motor running；When drive system refers in outside
When under order control to motor, single-chip microcomputer 3-7 obtains the letter of electric motor operation by running status input circuit 3-2
Breath, start the current value that monitoring current Acquisition Circuit 3-4 is input in single-chip microcomputer, motor stator is judged whether from program
Winding no current, undercurrent, overcurrent, the anomaly of current imbalance, there is anomaly and reset work according to setting time
Make relay, disconnect the control power supply of drive system, drive system is stopped, and fault message is total by serial communication
Line 3-8 is sent to display, button, condition indication circuit 3-9 are shown, stored；Realize alarm, defencive function.
Claims (4)
1. the motor stator exception loss protecting device based on chip microcontroller, including electrical equipment box base（1）With electrical equipment box cover
（4）, in electrical equipment box base（1）With electrical equipment box cover（4）Between circuit board is installed（3）, it is characterised in that in the circuit board
（3）On single-chip microcomputer is installed（3-7）And and single-chip microcomputer（3-7）The power module of connection（3-1）, running status input circuit
（3-2）, outputting circuit for relay（3-3）, current collection circuit（3-4）, voltage collection circuit（3-5）, frequency measurement circuit（3-
6）With pass through serial communication bus（3-8）With single-chip microcomputer（3-7）It has been shown that, button and the condition indication circuit being bi-directionally connected（3-9）.
2. chip microcontroller motor stator exception loss protecting device is based on according to claim 1, it is characterised in that described
Current collection circuit（3-4）Include current transformer（U201）, the first operational amplifier（U202A）, the second operational amplifier
（U202B）, the first sampling resistor（R201）, the first current-limiting resistance（R202）And filter capacitor（C203）With single-chip microcomputer first interface
（AN1）, wherein current transformer（U201）Motor current signal is obtained, by the first sampling resistor（R201）Obtain and motor electricity
Proportional voltage signal is flowed, then through the first current-limiting resistance（R202）And filter capacitor（C203）It is connected to the first operational amplifier
（U202A）Input, the first operational amplifier（U202A）Output end connection single-chip microcomputer first interface（AN1）Port.
3. chip microcontroller motor stator exception loss protecting device is based on according to claim 1, it is characterised in that described
Voltage collection circuit（3-5）Include voltage transformer（T900）, the second current-limiting resistance（R902）, the second sampling resistor
（R905）, the 3rd operational amplifier（U902A）, the 3rd current-limiting resistance (R900), the first optocoupler（U900）, single-chip microcomputer second interface
（INT0）With the interface (ANO) of single-chip microcomputer the 3rd, wherein supply voltage passes through the second current-limiting resistance（R902）It is connected to mutual induction of voltage
Device（T900）Primary side, voltage transformer（T900）Secondary connects the second sampling resistor（R905）, the second sampling resistor（R905）Even
It is connected to the 3rd operational amplifier（U902A）Input, the 3rd operational amplifier（U902A）Output end be connected to single-chip microcomputer
The port of three interfaces (ANO), while supply voltage accesses the first optocoupler after the 3rd current-limiting resistance (R900) current limliting（U900）, warp
First optocoupler（U900）Single-chip microcomputer second interface is connected to after isolation（INT0）Port.
4. chip microcontroller motor stator exception loss protecting device is based on according to claim 1, it is characterised in that described
Frequency measurement circuit（3-6）Including by single order resistance（R500）, second order resistance（R501）, single order electric capacity（C501）And second order capacitance
（C502）The second-order filter circuit of composition, by the first voltage-stabiliser tube（D500）With the second voltage-stabiliser tube（D501）Form voltage limiter circuit
And comparator（U500）, the second optocoupler（U501）With the interface of single-chip microcomputer the 4th（IC1）, wherein second-order filter circuit input termination
The rotor of winding motors, output end are connected to comparator through voltage limiter circuit（U500）Input, comparator（U500）'s
Output the second optocoupler of termination（U501）Input, the second optocoupler（U501）Output end connection the interface of single-chip microcomputer the 4th（IC1）
Port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720824520.3U CN207039169U (en) | 2017-07-10 | 2017-07-10 | Motor stator exception loss protecting device based on chip microcontroller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720824520.3U CN207039169U (en) | 2017-07-10 | 2017-07-10 | Motor stator exception loss protecting device based on chip microcontroller |
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| Publication Number | Publication Date |
|---|---|
| CN207039169U true CN207039169U (en) | 2018-02-23 |
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ID=61467019
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720824520.3U Active CN207039169U (en) | 2017-07-10 | 2017-07-10 | Motor stator exception loss protecting device based on chip microcontroller |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167339A (en) * | 2018-09-25 | 2019-01-08 | 北京卓立汉光仪器有限公司 | Automatic power loss contracting brake controller, equipment and control method |
| CN110118934A (en) * | 2019-03-08 | 2019-08-13 | 广东省特种设备检测研究院珠海检测院 | A kind of crane motor stator exception loss protecting function validation checking method |
| CN113759775A (en) * | 2021-11-09 | 2021-12-07 | 北京锐智华通科技有限公司 | Intelligent safety control device for lifting and walking of crane |
| CN113955642A (en) * | 2021-09-24 | 2022-01-21 | 广东省特种设备检测研究院珠海检测院 | Abnormal power-loss fault protection method for motor stator of crane hoisting mechanism |
-
2017
- 2017-07-10 CN CN201720824520.3U patent/CN207039169U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167339A (en) * | 2018-09-25 | 2019-01-08 | 北京卓立汉光仪器有限公司 | Automatic power loss contracting brake controller, equipment and control method |
| CN110118934A (en) * | 2019-03-08 | 2019-08-13 | 广东省特种设备检测研究院珠海检测院 | A kind of crane motor stator exception loss protecting function validation checking method |
| CN113955642A (en) * | 2021-09-24 | 2022-01-21 | 广东省特种设备检测研究院珠海检测院 | Abnormal power-loss fault protection method for motor stator of crane hoisting mechanism |
| CN113759775A (en) * | 2021-11-09 | 2021-12-07 | 北京锐智华通科技有限公司 | Intelligent safety control device for lifting and walking of crane |
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