CN208508822U - A kind of online soft starting device of motor - Google Patents
A kind of online soft starting device of motor Download PDFInfo
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- CN208508822U CN208508822U CN201820654507.2U CN201820654507U CN208508822U CN 208508822 U CN208508822 U CN 208508822U CN 201820654507 U CN201820654507 U CN 201820654507U CN 208508822 U CN208508822 U CN 208508822U
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Abstract
The utility model provides a kind of online soft starting device of motor, including shell, display on shell, the main controller for being set in the housing and being communicated to connect with display, on shell and the analog line driver that is connected to the motor, it is characterized in that main controller includes master cpu, drive generator, and respectively with master cpu, the triggering driver for driving generator connected, the triggering driver is connected with driving follower, driving follower is connected with analog line driver, respectively with master cpu, the phase loss detector for driving generator connected, zero-crossing detector and over-current detector, phase loss detector, zero-crossing detector and over-current detector are connected with the three-phase alternating current electrical input of analog line driver, the trigger controller being connected with master cpu, the trigger controller is connected with triggering driver.Can unlatching to soft start, stop and entire soft start-up process, phase shortage, zero passage or/and overcurrent, temperature, voltage, electric current are monitored, it is ensured that motor safety.Support the network communications such as mobile phone, IPAD, MODBUS.
Description
Technical field
The utility model relates to a kind of soft starting device, the dress of the online soft start of especially a kind of motor based on Internet of Things
It sets, belongs to power start engineering device technique field.
Background technique
The characteristics of asynchronous machine is with its excellent performance and Maintenance free, is widely used in all trades and professions.So
And due in traditional Starting mode, it is AC380 full voltage that when starting, which is added on motor, and motor will accelerate in moment from zero
To rated speed, causes starting current to reach 5-8 times of rated current of motor, simultaneously because starting stress is larger, can reduce negative
The service life of equipment is carried, while fatal impact is all constituted to entire network system, route, protection equipment.For this purpose, national
Relevant department early have to electric motor starting clearly stipulate that i.e. electric motor starting when network voltage decline no more than 15%.It is adopted by this
There are two the solutions taken: one is to increase distribution capacity, the other is increasing the starting device of limiting motor starting current.
If only increase distribution capacity for starting motor, it is economically upper for, it is clear that it is undesirable.For this purpose, people often match
The starting device of standby limiting motor starting current, and it is depressured etc. using Y/ △ conversion, from lotus root decompression, magnetic control modes come current limliting, from
And make motor realize smooth starting, finally allow mechanically and electrically stress minimize.Although these modes can play certain limit
Stream effect, but do not tackle the problem at its root.
With the continuous improvement that automation requires, use it is silicon-controlled for main devices, single-chip microcontroller be control core intelligence
Type motor soft starter is more and more applied in all trades and professions, due to soft activator function admirable, small in size, again
Amount is light, and has intelligent control and multi-protective function, and every start-up parameter can be adjusted according to different loads, be born
It is very strong to carry adaptability, therefore the biography such as this kind of soft activator will gradually replace backward Y/ Δ to convert, the decompression of self-coupling decompression and magnetic control
The current limiter of system.But traditional soft activator is carried out by the way of parallel connection outside contactor on startup, is only being started
With the driving and control for just participating in motor in stopped process, soft activator control external contactor is attracted after starting, at this time
Since soft activator is bypassed by external contactor, thus the operation for the motor that can not participate in the overall process, if power phase shortage, mistake occur at this time
When heat, overcurrent, overload, motor rotation blockage, motor burn etc. unexpected, soft activator can not make a response immediately, thus failure of leaving
Occur and spreads.Belong to mechanical equipment additionally, due to bypass contactor, worked using mechanical contact, dusty, with high salt
It can not long-time reliability service under the harsh environments such as mist.Therefore, it is necessary to be improved the prior art.
Summary of the invention
For solve deficiencies of the prior art, the utility model provide it is a kind of collect soft start and multifunction protection in
The online soft starting device of motor of one, can in entire start-up course smooth starting motor, while there are a variety of pairs of soft starts
And the function that motor is protected, fundamentally solve many drawbacks of traditional reduced-voltage starting equipment.
The utility model is completed by following technical proposal: a kind of online soft starting device, including shell are set on shell
Display, be set in the housing and the main controller with display communication connection, on shell and the power that is connected to the motor drives
Dynamic device, it is characterised in that main controller includes master cpu, driving generator, and is connected respectively with master cpu, driving generator
Triggering driver, the triggering driver with driving follower be connected, drive follower be connected with analog line driver, and respectively with
Master cpu, driving generator connected phase loss detector, zero-crossing detector and over-current detector, phase loss detector, zero passage detection
Device and over-current detector are connected with the three-phase alternating current electrical input of analog line driver, the trigger controller being connected with master cpu, should
Trigger controller is connected with triggering driver, to pass through phase loss detector, zero-crossing detector and overcurrent in soft start-up process
Detector detects the phase shortage of the three-phase alternating current of analog line driver, zero passage, overcurrent operating condition, when having detected phase shortage, mistake
Zero, when one or more of overcurrent signal, driving generator and master cpu are sent respectively, signal is first issued by driving generator
Triggering driver is given, and follower of being overdrived, analog line driver stop soft start-up process, then is compared, is sentenced by master cpu
It has no progeny, obtains being to continue with the instruction for carrying out soft start or terminating soft start, and the instruction is sent to triggering through master cpu
Controller, triggering driver, driving follower, analog line driver, are finally continued the control being also off to soft start-up process
System, it is ensured that motor safety.
Further, the master cpu is connected with temperature detector, for detecting the running temperature of analog line driver, out
When now abnormal, alarm is issued, is simultaneously stopped analog line driver work.
Further, the master cpu is connected with voltage detector, for detecting the three-phase alternating current of analog line driver
Voltage when occurring abnormal, issues alarm, is simultaneously stopped analog line driver work.
Further, the master cpu is connected with current detector, for detecting the three-phase alternating current of analog line driver
Electric current when occurring abnormal, issues alarm, is simultaneously stopped analog line driver work.
Further, the master cpu is connected with 485-2 interface, realizes two-way by the 485-2 interface and display
Letter.
Further, the master cpu is connected with expansion interface, external connection terminal, 485-1 interface, by expansion interface,
External connection terminal realizes communication, supports mobile phone, IPAD control, supports MODBUS communication protocol, support local networking, support PID
Using.
Further, the master cpu is connected with 4-20mA output, is used to indicate the running current value of motor.
Further, the master cpu is connected with 4-20mA input, and electric current when for closed-loop control returns the defeated of feedback value
Enter.
Further, the master cpu is connected with memory interface, for storing various data.
Further, the master cpu is connected with restorer, house dog, is automatically reset by restorer completion, by seeing
The operating status of door dog monitoring master cpu.
Further, the master cpu is connected with power supply, to power to master cpu.
Further, the 89C58RD of the model STC of the driving generator U10, in which: pin 2,3,4 and triggering are driven
The pin 8 of U19C, the pin 6 of U19B, the pin 3 of U19A of dynamic device are connected, for completing triggering driving；Pin 5 and overcurrent are examined
It surveys device to be connected, for obtaining over-current detection signal；Pin 15,16,17 by routine plastic device U1 corresponding with phase loss detector,
6 feet of U2, U3 are connected, for obtaining pile defection signal, judging whether there is phase shortage, while the corresponding U1 of phase loss detector,
6 feet of U2, U3 are as zero passage detection signal source, for obtaining the zero cross signal of three-phase alternating current, so as to when analog line driver
When any one or two kinds or three kinds of zero passage, overcurrent, phase shortage occurs in three-phase alternating current, touching is first sent a signal to by driving generator
Driver is sent out, and follower of being overdrived, analog line driver stop soft start-up process.
The model PIC18F46K22 of the master cpu, in which:
Pin 8,9,10 is connected by conventional reshaper with 6 feet of U3, U2, U1 of phase loss detector, for obtaining respectively
U, V, W pile defection signal are obtained, while 6 feet of phase loss detector corresponding U1, U2, U3 are used for as zero passage detection signal source
Obtain the zero cross signal of three-phase alternating current；
Pin 30 is connected with over-current detector, for obtaining over-current detection signal；
Pin 17,31 is the stopping of soft start, starting interface, is connected by the interface with external key, passes through key
Operation is to stop or start soft start；
The pin that pin 20,21,22 passes through the U28B of the triggering driver of conventional trigger controller and model 74F02
6, the pin 9 of U28C, the pin 12 of U28D are connected, triggering driver are given for exporting triggering driving signal, using routine
Follower, analog line driver is driven to carry out soft start to motor；
Pin 2,26 is connected with temperature detector, for detecting the running temperature of analog line driver, issues when occurring abnormal
Alarm is simultaneously stopped analog line driver work；
Pin 19 is connected with voltage detector, the voltage of the three-phase alternating current for detecting analog line driver, occurs abnormal
When issue alarm, be simultaneously stopped analog line driver work；
Pin 27,41,43 is connected with current detector, the electric current of the three-phase alternating current for detecting analog line driver, out
When now abnormal, alarm is issued, is simultaneously stopped analog line driver work；
Pin 1 is connected by 485-1 interface with display, realizes two-way communication by 485 interface and display；
Pin 3,38 is followed successively by 485-2 interface, expansion interface or external connection terminal, for realizing communication, support mobile phone,
IPAD control, supports MODBUS communication protocol, supports local networking, supports PID application；
Pin 24 is the input of 4-20mA electric current, output pin, and when output is used to indicate the running current value of motor, and when input is used
Electric current when closed-loop control returns the defeated of feedback value；
Pin 35 is memory interface, for storing various data；
Pin 11,36 is successively connected with restorer, house dog, is automatically reset by restorer completion, is supervised by house dog
Survey the operating status of master cpu；
Pin 7,28 feet are connected with power supply, for providing power supply；
Pin 23 is soft start fault-signal input pin, for receiving soft start fault-signal, to carry out to soft start
Control, it is ensured that soft start and motor safety；
Pin 25 is malfunction locking foot, is malfunctioned for preventing.
On the basis of above-mentioned connection, notify corresponding software programming, can unlatching to soft start, stop and entire soft
Start-up course is controlled, and especially when detecting that phase shortage, zero passage or/and overcurrent occurs in three-phase alternating current, send driving respectively
Generator and master cpu first send a signal to triggering driver, and follower of being overdrived, power drive by driving generator
Device stops soft start, then after being compared, judge by master cpu, is formed to be to continue with and carries out soft start or termination soft start
Instruction, and the instruction is sent to trigger controller, triggering driver, driving follower, analog line driver through master cpu, most
The control being also off is continued to soft start eventually, it is ensured that motor safety；Simultaneously in soft start-up process voltage, electric current,
Temperature is detected, it is ensured that motor safety.Again by expansion interface, 485 interfaces, communication is realized, support mobile phone, IPAD control,
It supports MODBUS communication protocol, supports local networking, support PID application.
Further, the display is conventional display, including display CPU, the display screen, the key that are connected with display CPU
Disk, indicator light, wireless communication, and be connected by 485 interfaces with master cpu, soft start, stopping, reset, ginseng are completed by keyboard
The operations such as number adjustment, the display of long-range operating status is realized further through wireless communication, and is adjusted to operating parameter, by aobvious
Display screen shows phase shortage, zero passage, over-current signal, temperature, pressure, current signal, while soft start, stopping, reset, parameter being adjusted
Signal send master cpu to be controlled.
The driving follower, analog line driver are conventional products.
Multivibrator is connected with triggering driver, to generate oscillator signal by multivibrator under normal circumstances
The work of driving power driver.
The utility model has following advantages and effect compared with prior art: by adopting the above technical scheme, can open soft
Dynamic unlatching stops and entire soft start-up process is controlled, especially when detecting that phase shortage, zero passage occurs in three-phase alternating current
Or/and when overcurrent, driving generator and master cpu are sent respectively, triggering driver is first sent a signal to by driving generator, and pass through
Overdrive follower, analog line driver stops soft start, then after being compared, judge by master cpu, it is soft that formation is to continue with progress
Starting or the instruction for terminating soft start, and the instruction is sent to trigger controller, triggering driver, driving through master cpu
Follower, analog line driver are finally continued the control being also off to soft start, it is ensured that motor safety, while whole ginseng
With the control of motor operation, temperature, voltage, electric current when real-time monitoring is run are obtained in time by temperature, voltage, curent change
It various chance failure information, and the omen occurred in failure such as must overload, so that soft start is made protection act immediately, to prevent
In addition the expansion of failure when an error occurs can control entire soft start-up process, it is ensured that motor safety.Pass through channel radio
Letter supports mobile phone, IPAD control, supports MODBUS communication protocol, supports local networking, support PID application, realizes equipment operation
The real-time monitoring and fault warning of state, and then realize the full-automatic unmanned operation on duty of equipment, labor intensity of operating staff is reduced,
The generation of safety accident is effectively reduced, improves production efficiency and failure recovery time.Improve overheat, overcurrent, overload, under-voltage, scarce
Phase, over-voltage fault monitoring and protection, realize that output voltage is gradual.The utility model can directly carry out one or two motors soft
Driving, and the driving voltage being added on motor is made to be slowly increased to 380V from 0V, so that the starting current of motor is effectively controlled,
It without being further added by the investment of protection equipment, and will not have any impact to entire network system, route, especially adapt in constant pressure
It supplies water, the use of gas supply field, production needs is met with least cost.
Detailed description of the invention
Fig. 1 is the utility model structural block diagram；
Fig. 2 is the driving generator circuit figure in Fig. 1；
Fig. 3 is the triggering drive circuit figure in Fig. 1；
Fig. 4 is the phase shortage in Fig. 1, zero-crossing detector circuit diagram；
Fig. 5 is the over-current detector circuit diagram in Fig. 1；
Fig. 6 is the master cpu circuit diagram in Fig. 1；
Fig. 7 is the voltage detector circuit figure in Fig. 1；
Fig. 8 is the temperature detection circuit figure in Fig. 1；
Fig. 9 is the current detection circuit figure in Fig. 1；
Figure 10 is the 485-1 interface circuit figure in Fig. 1；
Figure 11 is the 485-2 interface circuit figure in Fig. 1.
Specific embodiment
The utility model is described further with reference to the accompanying drawing.The circuit diagram not provided in attached drawing is conventional electricity
Road.
Online soft starting device provided by the utility model include: shell (do not provided in figure, can be any metal,
Non-metal shell), the display on shell, the main controller for being set in the housing and communicating to connect with display is set to shell
The analog line driver gone up and be connected to the motor；
The main controller includes master cpu, driving generator, and the touching being connected respectively with master cpu, driving generator
Send out driver, the triggering driver with driving follower be connected, drive follower be connected with analog line driver, and respectively with master control
CPU, driving generator connected phase loss detector, zero-crossing detector and over-current detector, phase loss detector, zero-crossing detector and
Over-current detector is connected with the three-phase alternating current electrical input of analog line driver, the trigger controller being connected with master cpu, the triggering
Controller is connected with triggering driver, to pass through phase loss detector, zero-crossing detector and over-current detection in soft start-up process
Device detects the phase shortage of the three-phase alternating current of analog line driver, zero passage, overcurrent operating condition, when having detected phase shortage, zero passage, mistake
When one or more of stream signal, driving generator and master cpu are sent respectively, triggering is first sent a signal to by driving generator
Driver, and follower of being overdrived, analog line driver stop soft start-up process, then after being compared, judged by master cpu,
It obtains being to continue with the instruction for carrying out soft start or terminating soft start, and the instruction is sent to triggering control through master cpu
Device, triggering driver, driving follower, analog line driver, are finally continued the control being also off to soft start-up process, really
Protect motor safety.
The master cpu is connected with temperature detector, for detecting the running temperature of analog line driver, when occurring abnormal,
Alarm is issued, analog line driver work is simultaneously stopped.
The master cpu is connected with voltage detector, the voltage of the three-phase alternating current for detecting analog line driver, occurs
When abnormal, alarm is issued, is simultaneously stopped analog line driver work.
The master cpu is connected with current detector, the electric current of the three-phase alternating current for detecting analog line driver, occurs
When abnormal, alarm is issued, is simultaneously stopped analog line driver work.
The master cpu is connected with 485-2 interface, realizes two-way communication by the 485-2 interface and display.
The master cpu is connected with expansion interface, external connection terminal, 485-1 interface, passes through expansion interface, external connection
Communication is realized at end, is supported mobile phone, IPAD control, is supported MODBUS communication protocol, support local networking, supports PID application.
The master cpu is connected with 4-20mA output, is used to indicate the running current value of motor.
The master cpu is connected with 4-20mA input, and electric current when for closed-loop control returns the input of feedback value.
The master cpu is connected with memory interface, for storing various data.
The master cpu is connected with restorer, house dog, is automatically reset by restorer completion, is monitored by house dog
The operating status of master cpu.
The master cpu is connected with power supply, to power to master cpu.
The 89C58RD of the model STC of the driving generator, in which: the U19C's of pin 2,3,4 and triggering driver
Pin 8, the pin 6 of U19B, the pin 3 of U19A are connected, for completing triggering driving；The end the OC2 phase of pin 5 and over-current detector
Even, for obtaining over-current detection signal；Pin 15,16,17 passes through routine plastic device U1, U2, U3 corresponding with phase loss detector
6 feet be connected, for obtaining pile defection signal, judging whether there is phase shortage, while phase loss detector corresponding U1, U2, U3
6 feet as zero passage detection signal source, for obtaining the zero cross signal of three-phase alternating current, so as to work as analog line driver three intersections
When any one or two kinds or three kinds of zero passage, overcurrent, phase shortage occurs in galvanic electricity, triggering driving is first sent a signal to by driving generator
Device, and follower of being overdrived, analog line driver stop soft start-up process.
The model PIC18F46K22 of the master cpu (U6), in which:
Pin 8,9,10 is connected by conventional reshaper with 6 feet of U3, U2, U1 of phase loss detector, for obtaining respectively
U, V, W pile defection signal are obtained, while 6 feet of phase loss detector corresponding U1, U2, U3 are used for as zero passage detection signal source
Obtain the zero cross signal of three-phase alternating current；
Pin 30 is connected with the end OC1 of over-current detector, for obtaining over-current detection signal；
Pin 17,31 is the stopping of soft start, starting interface, is connected by the interface with external key, passes through key
Operation is to stop or start soft start；
The pin that pin 20,21,22 passes through the U28B of the triggering driver of conventional trigger controller and model 74F02
6, the pin 9 of U28C, the pin 12 of U28D are connected, triggering driver are given for exporting triggering driving signal, using routine
Follower, analog line driver is driven to carry out soft start to motor；
Pin 26 is connected with the end T_ADC1 of temperature detector, for detecting the running temperature of analog line driver, occurs different
Alarm is issued when often, is simultaneously stopped analog line driver work；
Pin 19 is connected with the end AC_ADC of voltage detector, the electricity of the three-phase alternating current for detecting analog line driver
Pressure issues alarm when occurring abnormal, be simultaneously stopped analog line driver work；
Pin 27,43 is connected with the end the I_C ADC (SO) of current detector, for detecting the three-phase alternating current of analog line driver
The electric current of electricity when occurring abnormal, issues alarm, is simultaneously stopped analog line driver work；
Pin 1 is connected by 485-1 interface with display, realizes two-way communication by 485 interface and display；485-
Chip used US1 model MAX485 in 1 interface circuit；
Pin 3,38 is followed successively by 485-2 interface, expansion interface or external connection terminal, for realizing communication, support mobile phone,
IPAD control, supports MODBUS communication protocol, supports local networking, supports PID application；It is chip used in 485-2 interface circuit
U33 model MAX485；
Pin 24 is the input of 4-20mA electric current, output pin, and when output is used to indicate the running current value of motor, and when input is used
Electric current when closed-loop control returns the defeated of feedback value；
Pin 35 is memory interface, for storing various data；
Pin 11,36 is successively connected with restorer, house dog, is automatically reset by restorer completion, is supervised by house dog
Survey the operating status of master cpu；
Pin the 7th, 28 feet are connected with power supply, for providing power supply；
Pin 23 is soft start fault-signal input pin, for receiving soft start fault-signal, to carry out to soft start
Control, it is ensured that soft start and motor safety；
Pin 25 is malfunction locking foot, is malfunctioned for preventing.
On the basis of above-mentioned connection, by corresponding software programming, can unlatching to soft start, stop and entire soft
Start-up course is controlled, and especially when detecting that phase shortage, zero passage or/and overcurrent occurs in three-phase alternating current, send driving respectively
Generator and master cpu first send a signal to triggering driver, and follower of being overdrived, power drive by driving generator
Device stops soft start, then after being compared, judge by master cpu, is formed to be to continue with and carries out soft start or termination soft start
Instruction, and the instruction is sent to trigger controller, triggering driver, driving follower, analog line driver through master cpu, most
The control being also off is continued to soft start eventually, it is ensured that motor safety；Simultaneously in soft start-up process voltage, electric current,
Temperature is detected, it is ensured that motor safety.Again by expansion interface, 485 interfaces, communication is realized, support mobile phone, IPAD control,
It supports MODBUS communication protocol, supports local networking, support PID application.
The display be conventional display, including display CPU, with show CPU be connected display screen, keyboard, indicator light,
Wireless communication, and be connected by 485-1 interface with master cpu, soft start, stopping, reset, parameter adjustment etc. are completed by keyboard
Operation, the display of long-range operating status is realized further through wireless communication, and is adjusted to operating parameter, is shown by display screen
Phase shortage, zero passage, over-current signal, temperature, pressure, current signal, while sending soft start, stopping, reset, parameter adjustment signals to master
Control CPU is controlled.
The driving follower, analog line driver are conventional products.
Multivibrator is connected with triggering driver, to generate oscillator signal by multivibrator under normal circumstances
The work of driving power driver.
Claims (8)
1. a kind of online soft starting device, including shell, the display on shell are set in the housing and communicate with display
The main controller of connection, on shell and the analog line driver that is connected to the motor, it is characterised in that main controller include master cpu,
Generator is driven, and the triggering driver being connected respectively with master cpu, driving generator, the triggering driver and driving are defeated
Device is connected out, and driving follower is connected with analog line driver, and the pile defection being connected respectively with master cpu, driving generator
Device, zero-crossing detector and over-current detector, the three-phase of phase loss detector, zero-crossing detector and over-current detector and analog line driver
AC input is connected, the trigger controller being connected with master cpu, which is connected with triggering driver.
2. online soft starting device according to claim 1, it is characterised in that the master cpu respectively with temperature detection
Device, voltage detector, current detector are connected.
3. online soft starting device according to claim 1, it is characterised in that the master cpu respectively with 485-2 interface,
Expansion interface, external connection terminal, 485-1 interface are connected.
4. online soft starting device according to claim 1, it is characterised in that the master cpu is defeated with 4-20mA respectively
Out, 4-20mA input, memory interface, restorer, house dog, power supply are connected.
5. online soft starting device according to claim 1, it is characterised in that the model of the driving generator U10
The 89C58RD of STC, in which: pin 2,3,4 and the triggering pin 8 of U19C of driver, the pin 6 of U19B, U19A pin 3
Be connected, pin 5 is connected with over-current detector, pin 15,16,17 pass through routine plastic device U1, U2 corresponding with phase loss detector,
6 feet of U3 are connected, while 6 feet of phase loss detector corresponding U1, U2, U3 are as zero passage detection signal source.
6. online soft starting device according to claim 1, it is characterised in that the model of the master cpu
PIC18F46K22, in which:
Pin 8,9,10 is connected by conventional reshaper with 6 feet of U3, U2, U1 of phase loss detector, for acquisition U respectively,
V, W pile defection signal, while 6 feet of phase loss detector corresponding U1, U2, U3 are as zero passage detection signal source；
Pin 30 is connected with over-current detector；
Pin 17,31 is the stopping of soft start, starting interface；
Pin 20,21,22 by the pin 6 of the U28B of the triggering driver of conventional trigger controller and model 74F02,
The pin 9 of U28C, the pin 12 of U28D are connected；
Pin 2,26 is connected with temperature detector；
Pin 19 is connected with voltage detector；
Pin 27,41,43 is connected with current detector；
Pin 1 is connected by 485-1 interface with display, realizes two-way communication by 485 interface and display；
Pin 3,38 is followed successively by 485-2 interface, expansion interface or external connection terminal；
Pin 24 is the input of 4-20mA electric current, output pin；
Pin 35 is memory interface；
Pin 11,36 is successively connected with restorer, house dog；
Pin 7,28 feet are connected with power supply；
Pin 23 is soft start fault-signal input pin；
Pin 25 is malfunction locking foot.
7. online soft starting device according to claim 1, it is characterised in that the display is conventional display, including
Display CPU, display screen, keyboard, the indicator light, wireless communication being connected with display CPU, and pass through 485 interfaces and master cpu phase
Even.
8. online soft starting device according to claim 1, it is characterised in that triggering driver is connected with multivibrator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820654507.2U CN208508822U (en) | 2018-05-04 | 2018-05-04 | A kind of online soft starting device of motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820654507.2U CN208508822U (en) | 2018-05-04 | 2018-05-04 | A kind of online soft starting device of motor |
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| CN208508822U true CN208508822U (en) | 2019-02-15 |
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ID=65298361
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108712113A (en) * | 2018-05-04 | 2018-10-26 | 云南兆富科技有限公司 | A kind of online soft starting device of motor |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108712113A (en) * | 2018-05-04 | 2018-10-26 | 云南兆富科技有限公司 | A kind of online soft starting device of motor |
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