CN108855575A - Start the frequency-converting control device and method of double broken hosts using single frequency converter - Google Patents
Start the frequency-converting control device and method of double broken hosts using single frequency converter Download PDFInfo
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- CN108855575A CN108855575A CN201810867574.7A CN201810867574A CN108855575A CN 108855575 A CN108855575 A CN 108855575A CN 201810867574 A CN201810867574 A CN 201810867574A CN 108855575 A CN108855575 A CN 108855575A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000004576 sand Substances 0.000 claims abstract description 34
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 230000001934 delay Effects 0.000 claims description 6
- 230000003111 delayed effect Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 and specifically Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
- H02P1/04—Means for controlling progress of starting sequence in dependence upon time or upon current, speed, or other motor parameter
- H02P1/10—Manually-operated on/off switch controlling relays or contactors operating sequentially for starting a motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/54—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting two or more dynamo-electric motors
- H02P1/58—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting two or more dynamo-electric motors sequentially
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Food Science & Technology (AREA)
- Control Of Ac Motors In General (AREA)
- Motor And Converter Starters (AREA)
Abstract
The invention discloses a kind of frequency-converting control devices and method for starting double broken hosts using single frequency converter, sand making machine including configuration main motor, the trimmer of auxiliary-motor and configuration single motor, the main motor control circuit of trimmer are equipped with time relay T1, interlocking relay switch KM1, KM2 and time relay T2；Relay switch KM3, the time relay T3 controlled by time relay T2 is set on auxiliary-motor operating circuit；The relay switch KM5 controlled by time relay T3 is arranged in the single motor of sand making machine, auxiliary-motor, sand making machine motor operating circuit sequence starting are controlled by time relay T1 and interlocking relay switch KM1, KM2 control frequency start-up circuit and the power on/off switching of pressure stabilizing operating circuit, the time relay T2, T3, a Frequency Converter Control multiple electric motors starting can be achieved, it is at low cost, variable frequency starting voltage is steadily without impact, safety coefficient is high, and variable ratio frequency changer adjusts the speed, high production efficiency.
Description
Technical field
The present invention relates to a kind of frequency-converting control devices and method for starting double broken hosts using single frequency converter, belong to broken control
Technical field processed.
Background technique
At present in conventional crushing production line, sand reduction stage processed mostly uses single main finished sand, and specifically, material passes through vertical shaft
Broken crusher machine enters screening system, and qualified products enter finished bin by finished belt machine, and oversize material passes through return conveyer machine
It is transmitted back to vertical-spindle hammer crusher Mechanical Crushing.The advantages of this conventional crushing production line is to save equipment investment, but have a single function, only
Energy single-stage crushing, can not carry out gradation adjustment；When if necessary to gradation adjustment, motor or adjustment skin can only be broken by replacement vertical shaft
Band wheel speed changes crusher reduction ratio and realizes, troublesome in poeration.If broken in addition, single host technique only produces finished sand completely
It is broken than small, low output.If necessary to improve yield, it is necessary to reduce feed size and just be able to achieve, reducing feed size must just increase
Add single stage crushing, equally also will increase equipment investment.
In addition, in crushing production line, sand vertical shaft processed is broken when starting and stopping, and conventional mode is reduced-voltage starting or soft
Starting mode all can generate greater impact, danger coefficient to power grid when starting motor since the power of motor that vertical shaft is broken is larger
Height, and a possibility that can not starting is had when voltage is lower than 380V, influence the stable operation of crushing production line.It is more existing to adopt
With frequency converter is increased, host is started and stopped by frequency conversion control technique, it is possible to prevente effectively to electricity when electric motor starting
The impact of net, but every motor is needed all to configure corresponding frequency converter, equipment cost is high, and maintenance cost is also high.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of this frequency conversion controls for starting double broken hosts using single frequency converter
Device and method processed, can be with overcome the deficiencies in the prior art.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions：
A kind of frequency-converting control device starting double broken hosts using single frequency converter, including trimmer and sand making machine, the shaping
Machine be configure main motor and auxiliary-motor vertical shaft it is broken, the sand making machine be to configure the high-speed high frequency vertical shaft of single motor to break, described whole
The main motor control circuit of shape machine includes variable frequency starting circuit and pressure stabilizing operating circuit, and the variable frequency starting circuit is equipped with the time
Relay T1, relay switch KM1 and start button SB1, frequency converter and the relay switch for controlling its power on/off for controlling its folding
KM4；The pressure stabilizing operating circuit, which is equipped with, cooperates interlocking relay switch KM2 and time relay T2, institute with relay switch KM1
It states time relay T1 and interlocking relay switch KM1, KM2 is used for the on-off cutting of frequency start-up circuit and pressure stabilizing operating circuit
It changes, the time relay T2 and the relay switch KM3 for being arranged on the auxiliary-motor operating circuit of trimmer, controlling its power on/off
Connection；The relay switch KM3 is connect with relay switch KM4, and time relay T3 is equipped on auxiliary-motor operating circuit,
Its on the motor operating circuit that sand making machine is set, the relay switch KM5 of controller power on/off connect.
Be equipped in aforementioned frequency converter slow down power grid impact electric time delays relay TA/TC, and it is delayed
The electric time is 3s or more.
Aforesaid time relay T1 is that on-delay disconnects relay, and its turn-off time that is delayed is 15s or more.
Aforesaid time relay T2 and time relay T3 is on-delay closing relay, and its timing closing time
For 5s or more.
It is all provided on the motor operating circuit of the main motor control circuit of aforementioned trimmer, auxiliary-motor operating circuit and sand making machine
Have and is spaced apart QF1, QF2, QF3 for protect control circuit.
A kind of method for controlling frequency conversion being started double broken hosts using single frequency converter, is included the following steps：
A, it closes and is spaced apart QF1, QF2, QF3, and press start button SB1, relay switch KM1 obtains electric closure, so that relay switch
KM4 obtains electric closure, and frequency converter obtains electric, the variable frequency starting power on circuitry of trimmer main motor, main motor variable frequency starting；
B, after variable frequency starting power on circuitry, time relay T1 on-delay is disconnected, variable frequency starting down circuitry, relay switch
KM1 is disconnected, while interlocking relay switch KM2 obtains electric closure therewith, is switched to the energization of main motor pressure stabilizing operating circuit；
C, after the pressure stabilizing operating circuit of main motor is powered, time relay T2 on-delay closure, the auxiliary-motor work of trimmer
Relay switch KM3 obtains electric closure, auxiliary-motor starting on circuit；
D, relay switch KM3 obtains electric closure, and the relay switch KM3 being attached thereto obtains electric closure, and the auxiliary-motor work of trimmer
After making power on circuitry, time relay T3 on-delay closure, on the operating circuit of sand making machine motor, relay switch KM4 and after
Electric switch KM5 obtains electric closure, the starting of sand making machine motor frequency conversion, and carries out frequency control.
In abovementioned steps a, after relay switch KM4 closure, after the time delays relay TA/TC delay 3s inside frequency converter
It is attracted, main motor variable frequency starting.
In root abovementioned steps b, after the variable frequency starting power on circuitry of main motor, after time relay T1 energization 15s, main motor
Varying frequency starting reach maximum speed, time relay T1 is disconnected, while being switched to main motor pressure stabilizing operating circuit and being powered on.
In abovementioned steps c, after main motor pressure stabilizing operating circuit is powered, time relay T2 is attracted after obtaining electric delay 5s, after
Electric switch KM3 obtains electric closure, and auxiliary-motor is cut directly into power supply rotation.
In abovementioned steps d, after the relay switch KM3 obtains electric closure, relay switch KM4 obtains electric closure, at the same the time after
Electric appliance T5 is attracted after obtaining electric delay 5s, and relay switch KM5 obtains electric closure, and sand making machine variable frequency starting reaches maximum speed when progress
Frequency speed regulation.
Compared with the prior art, the present invention discloses a kind of frequency-converting control device for starting double broken hosts using single frequency converter
And method, it is used to carry out the production line of broken production using double hosts, double hosts include trimmer and sand making machine, described
Main motor and auxiliary-motor are configured on trimmer, the sand making machine is the single motor of configuration high-speed high frequency, in the control of three motors
Circuit is equipped with a frequency converter, and may be implemented to start three motors, specifically, the main electricity of trimmer by a frequency converter
Machine control circuit includes variable frequency starting circuit and pressure stabilizing operating circuit, and frequency converter is arranged on variable frequency starting circuit, makes its progress
Variable frequency starting, at the same variable frequency starting circuit be equipped with time relay T1 and relay switch KM1, pressure stabilizing operating circuit be equipped with
Relay switch KM1 cooperates interlocking relay switch KM2 and time relay T2, by time relay T1 and interlocking after establishing by cable
Closing KM1, KM2 may be implemented the power on/off switching of variable frequency starting circuit and pressure stabilizing operating circuit, variable frequency starting power on circuitry, time
After relay T1 energization 15s, the varying frequency starting of main motor reaches maximum speed, and time relay T1 is disconnected, while being switched to master
Motor pressure stabilizing operating circuit is powered on, and by weak electric signal, parameter and variable output, is changed frequency size, is set machinery
It is standby steadily to be operated along slope angular speed under static state and reach power frequency, to meet the operation of equipment electromechanical integration；It is described
Time relay T2 is connect with the relay switch KM3 on the auxiliary-motor operating circuit that trimmer is arranged in, and time relay T2 is obtained
It is attracted after electricity delay 5s, relay switch KM3 obtains electric closure, and auxiliary-motor is cut directly into power supply rotation；On auxiliary-motor operating circuit
Equipped with time relay T3, the relay switch KM3 is connect with relay switch KM4, and time relay T3 and setting are in sand making machine
Motor operating circuit on relay switch KM5 connection, time relay T5 is attracted after obtaining electric delay 5s, and relay switch KM5 is obtained
Electricity closure, sand making machine variable frequency starting carry out frequency speed regulation, and then the sand production rate of adjustable system when reaching maximum speed.
The present invention has the advantages that：
（1）It meets more motor sequence startings by start & shutdown through one key by a Frequency Converter Control multiple electric motors starting, grasps
Make it is simple and convenient, it is at low cost.
（2）Host is started and stopped by frequency conversion control technique, variable frequency starting voltage, also can be steadily without impact
Multiple electric motors starting is realized when undertension, strong applicability, stability is good, and safety coefficient is high.
（3）It can adjust high-speed high frequency vertical shaft by frequency converter and break revolving speed, the reduction ratio of crushing system can be adjusted flexibly, no
It needing replacing motor pulley or carries out other machinery adjustments, applicability is wide, and structure is simple, and adjustment is easy, and it is time saving and energy saving, significantly
Reduce the labor intensity of staff.
（4）By the adjustable finished product output capacity of frequency converter, automated production may be implemented, substantially increase production effect
Rate, flexibility is high, practical.
Detailed description of the invention
Fig. 1 is the working principle of the invention schematic diagram.
Fig. 2 is connection schematic diagram of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description：
As depicted in figs. 1 and 2, a kind of frequency-converting control device starting double broken hosts using single frequency converter, including trimmer and
Sand making machine, the trimmer be configure main motor 1 and auxiliary-motor 2 vertical shaft it is broken, the sand making machine be the high speed of configuration single motor 3
High frequency vertical shaft is broken, and the circuit processed of main motor 1 of the trimmer includes variable frequency starting circuit 101 and pressure stabilizing operating circuit 102, the two
By the way that time relay T1 and interlock switch KM1, KM2 progress power on/off switching on the control circuitry, the interlocking is arranged
Switch KM1, KM2 include start button SB1, the KM1 coil and KM1 normally opened contact, KM2 being arranged on variable frequency starting circuit 101
Normally-closed contact is formed with the KM2 coil and KM1 normally-closed contact that are arranged on pressure stabilizing operating circuit 102 and is interlocked, the time after
Electric appliance T1 is arranged on variable frequency starting circuit 101, disconnects relay for on-delay, and its turn-off time that is delayed is 15s
More than, it is additionally provided with frequency converter 4 on variable frequency starting circuit 101 and controls the relay switch KM4 of its power on/off, the frequency converter 4
It is interior be equipped with slow down power grid impact electric time delays relay TA/TC, and its be delayed the electric time is 3s or more, it is described steady
Pressure operating circuit 102 on be additionally provided with time relay T2, with control trimmer 201 power on/off of auxiliary-motor operating circuit after
Electric switch KM3 connection；The relay switch KM3 is connect with relay switch KM4, and is equipped on auxiliary-motor operating circuit 201
Time relay T3, relay switch KM3 and time relay T3 its be used to control relay on the motor operating circuit 301 of sand making machine
The folding of switch KM4 and relay switch KM5, make 3 variable frequency starting of motor of sand making machine, and carry out frequency control.The time after
Electric appliance T2 and time relay T3 is on-delay closing relay, and its timing closing time is 5s or more, guarantees secondary electricity
Machine operating circuit 201, sand making machine motor operating circuit 301 can in order and separated in time successively start.
The motor operating circuit of 1 control circuit of main motor of the trimmer, auxiliary-motor operating circuit 201 and sand making machine
It is equipped on 301 and is spaced apart QF1, QF2, QF3 for protect control circuit.
A kind of method for controlling frequency conversion being started double broken hosts using single frequency converter, is included the following steps：
It is spaced apart QF1, QF2, QF3 firstly, closing, and presses start button SB1, the interlock switch KM1 on variable frequency starting circuit 101
Coil obtains electric, KM1 normally opened contact closure, while the KM1 normally-closed contact on pressure stabilizing operating circuit 102 disconnects, with the normally opened touching of KM1
Point connection relay switch KM4 obtains electric closure, is attracted after the time delays relay TA/TC delay 3s inside frequency converter 4, frequency converter
4 obtain electric, the energization of variable frequency starting circuit 101 of trimmer main motor 1,1 variable frequency starting of main motor；
When variable frequency starting circuit 101 is powered, after time relay T1 energization 15s, the varying frequency starting of main motor 1 reaches highest and turns
Speed, time relay T1 are disconnected, interlock switch KM1 coil blackout, and the KM1 normally opened contact on variable frequency starting circuit 101 disconnects, together
When pressure stabilizing operating circuit 102 on KM1 normally-closed contact closure, variable frequency starting circuit 101 powers off, connect with KM1 normally-closed contact
Relay switch KM2 obtains electric closure, is switched to the energization of main motor pressure stabilizing operating circuit, carries out even running, work；
After the pressure stabilizing operating circuit 102 of main motor is powered, it is closed after the time relay T2 on-delay 5s on circuit, it is whole
Relay switch KM3 obtains electric closure on the auxiliary-motor operating circuit 201 of shape machine, and auxiliary-motor 2 starts；
After the auxiliary-motor operating circuit 201 of trimmer is powered, above-mentioned relay switch KM3 obtains electric closure, so that be attached thereto
Relay switch KM4 obtains electric closure, and is closed after time relay T3 on-delay 5s, in the motor operating circuit of sand making machine
On 301, relay switch KM4 and relay switch KM5 electric closure, 3 variable frequency starting of sand making machine motor, and carry out frequency conversion tune
Speed.
Claims (10)
1. a kind of frequency-converting control device for starting double broken hosts using single frequency converter, including trimmer and sand making machine, described whole
Shape machine be configure main motor and auxiliary-motor vertical shaft it is broken, the sand making machine be configure single motor high-speed high frequency vertical shaft it is broken, spy
Sign is：The main motor control circuit of the trimmer includes variable frequency starting circuit and pressure stabilizing operating circuit, the variable frequency starting
Circuit, which is equipped with time relay T1, relay switch KM1 and controls the start button SB1 of its folding, frequency converter and control it, to be led to
The relay switch KM4 of power-off；The pressure stabilizing operating circuit be equipped with relay switch KM1 cooperate interlocking relay switch KM2 and
The time relay T2, the time relay T1 and interlocking relay switch KM1, KM2 work for frequency start-up circuit and pressure stabilizing
The power on/off of circuit switches, and the time relay T2 and is arranged on the auxiliary-motor operating circuit of trimmer, controls its on-off
The relay switch KM3 connection of electricity；The relay switch KM3 is connect with relay switch KM4, and is set on auxiliary-motor operating circuit
Having time relay T3, on the motor operating circuit that sand making machine is set, the relay switch KM5 of controller power on/off connect
It connects.
2. the frequency-converting control device according to claim 1 for starting double broken hosts using single frequency converter, it is characterised in that：
In the frequency converter be equipped with slow down power grid impact electric time delays relay TA/TC, and its be delayed the electric time is
3s or more.
3. the frequency-converting control device according to claim 1 for starting double broken hosts using single frequency converter, it is characterised in that：
The time relay T1 is that on-delay disconnects relay, and its turn-off time that is delayed is 15s or more.
4. the frequency-converting control device according to claim 1 for starting double broken hosts using single frequency converter, it is characterised in that：
The time relay T2 and time relay T3 be on-delay closing relay, and its timing closing time be 5s with
On.
5. the frequency-converting control device according to claim 1 for starting double broken hosts using single frequency converter, it is characterised in that：
It is equipped on the motor operating circuit of the main motor control circuit of the trimmer, auxiliary-motor operating circuit and sand making machine for protecting
Shield control circuit is spaced apart QF1, QF2, QF3.
6. a kind of method for controlling frequency conversion for starting double broken hosts using single frequency converter, which is characterized in that include the following steps：
A, it closes and is spaced apart QF1, QF2, QF3, and press start button SB1, relay switch KM1 obtains electric closure, so that relay switch
KM4 obtains electric closure, and frequency converter obtains electric, the variable frequency starting power on circuitry of trimmer main motor, main motor variable frequency starting；
B, after variable frequency starting power on circuitry, time relay T1 on-delay is disconnected, variable frequency starting down circuitry, relay switch
KM1 is disconnected, while interlocking relay switch KM2 obtains electric closure therewith, is switched to the energization of main motor pressure stabilizing operating circuit；
C, after the pressure stabilizing operating circuit of main motor is powered, time relay T2 on-delay closure, the auxiliary-motor work of trimmer
Relay switch KM3 obtains electric closure, auxiliary-motor starting on circuit；
D, relay switch KM3 obtains electric closure, and the relay switch KM3 being attached thereto obtains electric closure, and the auxiliary-motor work of trimmer
After making power on circuitry, time relay T3 on-delay closure, on the operating circuit of sand making machine motor, relay switch KM4 and after
Electric switch KM5 obtains electric closure, the starting of sand making machine motor frequency conversion, and carries out frequency control.
7. the method for controlling frequency conversion according to claim 6 for starting double broken hosts using single frequency converter, it is characterised in that：
In step a, after relay switch KM4 closure, it is attracted after the time delays relay TA/TC delay 3s inside frequency converter, main motor
Variable frequency starting.
8. the method for controlling frequency conversion according to claim 6 for starting double broken hosts using single frequency converter, it is characterised in that：
In step b, after the variable frequency starting power on circuitry of main motor, after time relay T1 energization 15s, the varying frequency starting of main motor reaches
Maximum speed, time relay T1 is disconnected, while being switched to main motor pressure stabilizing operating circuit and being powered on.
9. the method for controlling frequency conversion according to claim 6 for starting double broken hosts using single frequency converter, it is characterised in that：
In step c, after main motor pressure stabilizing operating circuit is powered, time relay T2 is attracted after obtaining electric delay 5s, and relay switch KM3 obtains electric
Closure, auxiliary-motor are cut directly into power supply rotation.
10. the method for controlling frequency conversion according to claim 6 for being started double broken hosts using single frequency converter, feature are existed
In：In step d, after the relay switch KM3 obtains electric closure, relay switch KM4 obtains electric closure, at the same time relay T5 obtain it is electric
It is attracted after delay 5s, relay switch KM5 obtains electric closure, and sand making machine variable frequency starting carries out frequency speed regulation when reaching maximum speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810867574.7A CN108855575B (en) | 2018-08-02 | 2018-08-02 | Variable frequency control device and method for starting double crushing hosts by adopting single frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810867574.7A CN108855575B (en) | 2018-08-02 | 2018-08-02 | Variable frequency control device and method for starting double crushing hosts by adopting single frequency converter |
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| Publication Number | Publication Date |
|---|---|
| CN108855575A true CN108855575A (en) | 2018-11-23 |
| CN108855575B CN108855575B (en) | 2023-06-27 |
Family
ID=64306886
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| CN201810867574.7A Active CN108855575B (en) | 2018-08-02 | 2018-08-02 | Variable frequency control device and method for starting double crushing hosts by adopting single frequency converter |
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| CN112242800A (en) * | 2020-11-20 | 2021-01-19 | 中船华南船舶机械有限公司 | Multi-motor electric control system |
| CN114289168A (en) * | 2021-12-29 | 2022-04-08 | 内蒙古超牌新材料股份有限公司 | Depolymerizing machine system and starting method thereof |
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| CN112242800A (en) * | 2020-11-20 | 2021-01-19 | 中船华南船舶机械有限公司 | Multi-motor electric control system |
| CN112242800B (en) * | 2020-11-20 | 2022-05-17 | 中船华南船舶机械有限公司 | Multi-motor electric control system |
| CN114289168A (en) * | 2021-12-29 | 2022-04-08 | 内蒙古超牌新材料股份有限公司 | Depolymerizing machine system and starting method thereof |
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| CN108855575B (en) | 2023-06-27 |
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