CN208257693U - Multifunctional three-phase AC asynchronous motor soft start controls box and its control circuit - Google Patents
Multifunctional three-phase AC asynchronous motor soft start controls box and its control circuit Download PDFInfo
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- CN208257693U CN208257693U CN201820926902.1U CN201820926902U CN208257693U CN 208257693 U CN208257693 U CN 208257693U CN 201820926902 U CN201820926902 U CN 201820926902U CN 208257693 U CN208257693 U CN 208257693U
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Abstract
The utility model discloses a kind of Multifunctional three-phase AC asynchronous motor soft start control box and its control circuits.Control provided by the utility model and control circuit use discrete splicing structure, compared to whole Milling Machining structure, have the features such as compact-sized, save the cost, easy to maintain and light-weight.Using ac thyristor and three-phase ac contactor, soft start is realized under the control of the control circuit, the soft start stage is undertaken by three-phase synchronous transformer, three phase-shift voltage regulating trigger modules and ac thyristor module, power output is undertaken by three-phase ac contactor after soft start-up process, the advantage of ac thyristor and three-phase contactor can be given full play to, electric arc when heating power consumption and the three-phase contactor disjunction of ac thyristor is effectively reduced, enhances life of product and reliability.Soft-start time, which is adjusted, is arranged potentiometer realization by the time for being forward-mounted plate, and MCU controller linearly controls soft-start time by the voltage value that potentiometer is arranged in acquisition time.
Description
Technical field
The utility model relates to a kind of three-phase AC asynchronous motor soft starts to control box, especially a kind of logical with no arc
Disconnected, the protection of overheating protection, power phase shortage Multifunctional three-phase AC asynchronous motor starting control box.In addition, the utility model
Further relate to a kind of control circuit for three-phase AC asynchronous motor soft start control box.
Background technique
Three-phase AC asynchronous motor is a kind of electric drive for converting electrical energy into mechanical energy.It is mainly by fixed
Son, rotor and the air gap between them are constituted.After leading to three-phase alternating-current supply to stator winding, generates rotating excitation field and cutting turns
Son obtains torque.Three-phase AC asynchronous motor is simple, reliable for operation, cheap with structure, overload capacity is strong and makes
With, installation, it is easy to maintain the advantages that, be widely used in every field.
Using mode is directly initiated when traditional three-phase AC asynchronous motor starts, the starting current of the Starting mode is logical
It is often 4~7 times of three-phase AC asynchronous motor rated operational current, biggish inrush current usually will cause following danger
Evil: 1, the loss of voltage is excessive, and detent torque deficiency causes motor not start normally；2, motor heating in winding, insulation ag(e)ing,
Shorten electrical machinery life；3, overcurrent protective device malfunction, tripping are caused.Secondly, threephase asynchronous power phase shortage can cause
Result in violent vibration of motor gently then damages equipment, heavy then life-threatening and property safety.
Utility model content
In order to solve the problems of in the prior art, one kind in this that is designed to provide of the utility model can
Realize that the Multifunctional three-phase AC asynchronous motor soft start of three-phase AC asynchronous motor soft start controls box.The control box is also
Have the function of no arc switching, overheating protection and open-phase protection etc..
Here, second purpose of the utility model also resides in and provides a kind of control for three-phase alternating-current motor soft start
Circuit processed.
In order to realize the utility model first purpose in this, provided Multifunctional three-phase AC asynchronous motor is soft
Starting control box includes cavity shell, control circuit board, temperature switch, three-phase synchronous transformer, three-phase phase shifting pressure regulation trigger mode
Potentiometer, binding post is arranged in block, ac thyristor module, power relay, three-phase ac contactor, open phase protector, time
And junction board；Wherein, the control circuit board, the temperature switch, the three-phase synchronous transformer, the three-phase phase shifting pressure regulation
Trigger module, the ac thyristor module, the power relay, the three-phase ac contactor and the open phase protector
It is installed in the hollow shell body and potentiometer, the binding post and the wiring is arranged in electrical connection between each other, the time
The tablecloth is set on the outer surface of the cavity shell, the time setting potentiometer, the binding post and junction board difference
It is electrically connected with control circuit board.
Control box combination control circuit board, three-phase synchronous transformer, three phase-shift voltage regulating trigger modules and the ac thyristor
Module realizes the soft start of three-phase AC asynchronous motor, and it is defeated by three-phase ac contactor to undertake power after soft start-up process
Out, the advantage that ac thyristor and three-phase ac contactor can be given full play to, be effectively reduced ac thyristor heating power consumption and
Electric arc when three-phase ac contactor disjunction, realizes no arc switching, enhances life of product and reliability.
Potentiometer, which is arranged, by the time being set on control box can be realized the setting of soft-start time；In addition, this Shen
It please be also equipped with temperature switch and open phase protector in provided control box, realize overheating protection and open-phase protection.
Further, the cavity shell is mainly assembled by bottom plate, front panel, rear panel, left panel, right panel and cover board
It constitutes.There is compact-sized, save the cost compared to whole Milling Machining structure using discrete splicing structure, it is easy to maintain,
The features such as light-weight.
Further, provided control box further includes mounting rack, the mounting rack be installed in the hollow shell body and
Between the left panel and the right panel.
Further, three-phase synchronous transformer and three-phase phase shifting pressure regulation trigger module are installed on mounting rack.
Further, the control circuit board is installed on the top of the bottom plate by support column.
Further, the temperature switch, the ac thyristor module, the power relay, the three-phase alternating current
Contactor and the open phase protector are installed on the bottom plate.
Further, provided control box further includes the band lamp button switch being laid in the cavity housing outer surface
And/or indicator light.Indicative function can be not only played by band lamp button switch, but also hard reboot/stopping can be realized by the switch；
Indicator light is used to indicate.
Control circuit includes phase-shift voltage regulating trigger, rectified three-phase circuit, temperature signal input to the application provided herein
Circuit, MCU minimum system, time setting circuit, relay drive circuit and open phase protector；The phase shift adjusts trigger packet
Include three-phase synchronous transformer, three-phase phase shifting pressure regulation trigger module and ac thyristor module, the three-phase synchronous transformer it is defeated
Enter and terminate three phase mains, output end is respectively connected to the three-phase phase shifting pressure regulation trigger module and the rectified three-phase circuit, institute
It states the output end of rectified three-phase circuit and provides operating voltage for MCU minimum system；The signal of the temperature signal input circuit and
The output signal of the time setting circuit inputs the MCU minimum system, the voltage output end connection of the MCU minimum system
To the input terminal of the three-phase phase shifting pressure regulation trigger module, the control terminal of the relay drive circuit and MCU minimum system
The signal output end of system connects；One termination three phase mains of the ac thyristor module, another termination open phase protector,
The open phase protector is also connect with the MCU minimum system.
The circuit uses ac thyristor and three-phase ac contactor, realizes under the scheduling of MCU minimum system soft
Starting, soft start stage are undertaken by three-phase synchronous transformer, three phase-shift voltage regulating trigger modules and ac thyristor, soft start-up process
Power output is undertaken by three-phase ac contactor afterwards, the advantage of ac thyristor and three-phase contactor can be given full play to, is effectively dropped
The electric arc when heating power consumption of low ac thyristor and three-phase contactor disjunction enhances life of product and reliability.
It is additionally provided with temperature signal input circuit and open phase protector in the control circuit, realizes overheating protection and phase shortage
Protection.
Further, which further includes the failure alarm circuit being connected with the MCU minimum system.
Further, which further includes opening/stopping control circuit firmly, described to open/stop control circuit firmly described in
Relay drive circuit is connected to the MCU minimum system.
The beneficial effects of the utility model are:
1, the structure of the utility model uses discrete splicing structure, compared to whole Milling Machining structure, has structure tight
Gather, save the cost, it is easy to maintain and light-weight the features such as.
2, the power control part of the utility model is comprehensive uses ac thyristor and three-phase ac contactor, is controlling
Soft start is realized under the control of circuit, the soft start stage is by three-phase synchronous transformer, three phase-shift voltage regulating trigger modules and exchanges
Silicon controlled module undertakes, and undertakes power output by three-phase ac contactor after soft start-up process, can give full play to ac thyristor
With the advantage of three-phase contactor, electric arc when heating power consumption and the three-phase contactor disjunction of ac thyristor is effectively reduced, enhances
Life of product and reliability.
3, the soft-start time of the utility model, which is adjusted, is arranged potentiometer realization, MCU control by the time for being forward-mounted plate
Device processed linearly controls soft-start time by the voltage value that potentiometer is arranged in acquisition time.
Detailed description of the invention
Fig. 1 is the perspective view of control box provided by the utility model；
Fig. 2 is one of the internal structure chart of control box provided by the utility model；
Fig. 3 is the two of the internal structure chart of control box provided by the utility model；
Fig. 4 is the three of the internal structure chart of control box provided by the utility model；
Fig. 5 is the circuit diagram of control circuit provided by the utility model；
In figure: 1- bottom plate, 2- front panel, 3- rear panel, 4- left panel, 5- right panel, 6- mounting rack, 7- support column, 8-
Cover board, 9- control circuit board, 10- temperature switch, 11- three-phase synchronous transformer, 12- three-phase phase shifting pressure regulation trigger module, 13- are handed over
Potentiometer is arranged in stream silicon controlled module, 14- power relay, 15- three-phase ac contactor, 16- open phase protector, 17- time,
18- band lamp button switch, 19- indicator light, 20- binding post, 21- junction board.
Specific embodiment
The drawings and specific embodiments are combined to make the application technical solution claimed herein further details of
Explanation.
The application herein first purpose be to protect it is a kind of for the multi-functional of three-phase AC asynchronous motor soft start
Three-phase AC asynchronous motor soft start controls box, and the specific structure of the control box is as shown in Figs 1-4, wherein Fig. 1 shows
It is the outside drawing for controlling box, what Fig. 2 to Fig. 4 was indicated is the internal structure chart for controlling box.
As shown in Fig. 1-Fig. 4, control box provided herein includes being made of upper, bottom, left and right, preceding and back plate
Cavity shell, control circuit board 9, temperature switch 10, three-phase synchronous transformer 11, three-phase phase shifting pressure regulation trigger module 12, hand over
Stream silicon controlled module 13, three-phase ac contactor 15, open phase protector 16, time setting potentiometer 17, connects power relay 14
Terminal 20 and junction board 21.Wherein, control circuit board 9, temperature switch 10, three-phase synchronous transformer 11, three-phase phase shifting pressure regulation touching
Hair module 12, ac thyristor module 13, power relay 14, three-phase ac contactor 15 and open phase protector 16 are installed on sky
It is electrically connected to form in cavity shell and between each other complete functional circuit structure；Time is arranged potentiometer 17, binding post 20 and connects
Line platform 21 is laid on the outer surface of cavity shell and with control circuit board 9 and is electrically connected.Potentiometer 17, binding post is arranged in time
20 and junction board 21 and internal circuit form complete circuit structure.Time setting potentiometer 17 is used to debug soft-start time,
The corresponding relationship of potentiometer output voltage and soft-start time uses: potentiometer output voltage is bigger, and soft-start time is longer, electricity
When position device output voltage is 0V, soft-start time is default value 5s, when potentiometer output voltage reaches maximum value 5V, corresponds to soft open
The dynamic time is 25s.It can certainly be according to the actual situation using other corresponding relationships.
The binding post 20 and junction board 21 being set on the outer surface of cavity shell are used for and load (phase asynchronous electricity
Motivation) connection.
Wherein the upper of cavity shell, bottom, left and right, preceding and back plate can be integrally formed, and can also be spelled by independent panel
It fills, assembled using separate panels herein, specific structure is by bottom plate 1, front panel 2, rear panel 3, left panel 4, the right side
Panel 5 and the assembled composition of cover board 8.And each functional module device can be Arbitrary distribution in the intracorporal positional relationship of hollow shell, this
Apply for that the positional relationship used herein is specific as follows: being equipped with mounting rack 6, three-phase phase shifting pressure regulation touching between left panel 4 and right panel 5
Hair module 12 and three-phase synchronous transformer 11 are fixed on mounting rack 6 by screw.Control circuit board 9 is supportted by support column 7 bottom of from
Plate 1 is simultaneously fixed at bottom plate 1 top 5cm or 10cm by four screws, and open phase protector 16, exchange are also equipped on bottom plate 1
Silicon controlled module 13, temperature switch 10, power relay 14 and three-phase contactor 15.Potentiometer 17 and junction board 21 is arranged in time
It is laid on front panel 2, rear panel 3 is provided with binding post 20 and is laid on rear panel 3.
In addition, above control box on the basis of increase further include be laid in the cavity housing outer surface band lamp by
Button switch 18 and/or indicator light 19, band lamp button switch 18 are laid on front panel 2, and indicator light 19 is laid on cover board 8.
Band lamp button switch 18, indicator light 19 are connected to control circuit board 9 by conducting wire respectively.
It is installed on the intracorporal each functional module of hollow shell and time setting potentiometer constitutes entire control circuit, the control
Circuit processed includes phase-shift voltage regulating trigger, rectified three-phase circuit, temperature signal input circuit, MCU minimum system, time setting electricity
Road, relay drive circuit and open phase protector；It includes three-phase synchronous transformer, three-phase phase shifting tune that the phase shift, which adjusts trigger,
Trigger module and ac thyristor module are pressed, the input of the three-phase synchronous transformer terminates three phase mains, and output end connects respectively
It is connected to the three-phase phase shifting pressure regulation trigger module and the rectified three-phase circuit, the output end of the rectified three-phase circuit is MCU
Minimum system provides operating voltage；The output signal of the signal of the temperature signal input circuit and time setting circuit is defeated
Enter the MCU minimum system, the voltage output end of the MCU minimum system is connected to the three-phase phase shifting pressure regulation trigger module
Input terminal, the control terminal of the relay drive circuit are connect with the signal output end of the MCU minimum system；The exchange can
A termination three phase mains of silicon module is controlled, another to terminate the open phase protector, the open phase protector is also minimum with the MCU
System connection.
In order to which the structure of control circuit provided herein is better described, specific circuit theory is given herein
Figure, as shown in Figure 5.Herein in conjunction with the circuit structure of the further details of explanation of attached drawing 5 control circuit provided herein: moving
Phase pressure regulation trigger circuit is by three-phase synchronous transformer LTB3, three-phase phase shifting pressure regulation trigger module LTVT-SSR, ac thyristor
SSR1~SSR3 composition；Rectified three-phase circuit is by rectifier diode D1~D6, filter capacitor C1, C7, C8 and three terminal regulator IC1
Composition；Temperature signal input circuit is made of resistance R2~R5, R12~R14, capacitor C4~C6 and temperature switch T1；MCU is minimum
System is made of MCU controller PIC18F2580, resistance R8, R9 and capacitor C3；Electricity routing resistance R15 and potentiometer is arranged in time
RP1 is adjusted；Relay drive circuit is made of resistance R1, R6, R10, R11, triode Q1 and triode Q2；Open phase protector is
Relay J1.
Each specific connection relationship of separating component are as follows: input terminal R, S, T, N of three-phase synchronous transformer LTB3 is corresponding to be connected
It is connected to three-phase four-wire system power supply R, S, T, N, output end r1, r2, s1, s2, t1, t2 and phase-shift voltage regulating trigger module LTVT-SSR
R1, r2, s1, s2, t1, t2 be correspondingly connected with, control terminal CON1, COM of phase-shift voltage regulating trigger module LTVT-SSR, CON2,
COM, CON3, COM respectively with control terminal control terminal CON1, COM, CON2, COM and CON3 of ac thyristor SSR1~SSR3,
COM is correspondingly connected with, and the end the IN1 series resistance R7 of phase-shift voltage regulating trigger module LTVT-SSR is followed by MCU controller
The RC2/CCP1 foot of PIC12F2580, while filter capacitor C2 is in series between the end IN1 and ground；The diode of rectified three-phase circuit
The anode of D1~D3 is connected with r1, s1, t1 of synchrotrans LTB3 respectively, the cathode and three terminal regulator of diode D1~D3
1 foot of IC1 connects；The cathode of diode D4~D6 is connected with r2, s2, t2, and the anode of diode D4~D6 is connected to the ground.Three ends
Be parallel with capacitor C1 and capacitor C7 between 1 foot and ground of voltage-stablizer IC1, capacitor C1 connect with 1 foot of three terminal regulator ICI one
Termination power；2 feet of three terminal regulator IC1 are grounded, and capacitor C8, capacitor C8 are connected between 3 feet and ground of three terminal regulator IC1
The termination power being connect with 3 feet of three terminal regulator IC1；3 feet of three terminal regulator IC3 meet MCU controller PIC18F2580
VCC.An end of resistance R2~R5 is connected to 3 feet of three terminal regulator IC1 in input control signal, and the other end is respectively connected to MCU
RB0 foot, RB1 foot, RB4 foot and the RB5 foot of controller PIC18F2580；Normally opened button SB1, SB1 are in series between RB0 foot and ground
Both ends parallel resistance R12 and capacitor C4；Connect normally closed button SB2 between RB1 foot and ground, the both ends SB2 parallel resistance R13 and capacitor
C5；Connect the normally-closed contact of open phase protector J1, J1 normally-closed contact both ends parallel resistance R14 and capacitor C6 between RB4 foot and ground；
The normally-closed contact of serial temperature switch T1 between RB5 foot and ground.1 foot of MCU controller PIC18F2580 in MCU controller circuitry
Resistance R9 and capacitor C3 ground connection is passed sequentially through, the other end of capacitor C3 is followed by by resistance R8 to 3 feet of three terminal regulator IC1.
The resistance R15 and potentiometer RP1 of time setting circuit are connected between 3 feet of three terminal regulator IC1 and ground, resistance R14 and electricity
The RA0/AN0 foot of the public termination MCU controller PIC18F2580 of position device RP1.The RC4 foot of MCU controller PIC18F2580 is logical
The base stage that resistance R1 is connected to triode Q1 is crossed, resistance R6, emitter and ground are connected between the base stage and emitter of triode Q1
It is connected, collector connects power supply；Similarly, the RC5 foot of MCU controller PIC18F2580 is connected to triode Q2 by resistance R10
Base stage, be connected to resistance R11 between the base stage and emitter of triode Q2, emitter is connected to the ground, and collector connects power supply.Its
In, normally opened button SB1: soft start control button, for sending soft start control command.Normally closed button SB2: soft stop button,
For sending soft cease and desist order.
In addition, the failure alarm circuit being connected with MCU minimum system is further comprised on the basis of the above control circuit,
The failure alarm circuit that the application uses herein is made of resistance R16~R19 and indicator light LED1~LED4.Failure alarm circuit
The anode of middle LED4 indicator light is connected to 3 feet of three terminal regulator IC1, the minus earth of LED4 indicator light by resistance R19；Refer to
Show that series resistor R16, resistance R17 and resistance R18 are connected to respectively for the anode of the anode of lamp LED1, the anode of LED2 and LED3
RC3 foot, RC1 foot and the RC6 foot of MCU controller PIC18F2580, the yin of the cathode of indicator light LED1, the cathode of LED2 and LED3
Pole is grounded respectively.
Here, control circuit provided herein further includes having to open/stop control circuit firmly, it is described to open/stop control electricity firmly
Road is connected to MCU minimum system by relay drive circuit.The application use herein firmly open/stop control circuit by electromagnetism after
Electric appliance J4, exchange output type solid-state relay J2~J3, button SB3, hard stop button SB4 and three-phase contactor KM composition are opened firmly.
Exchange output type solid-state relay J2 coil be series between the collector and power supply of triode Q1, exchange output type solid-state after
The stationary contact of electric appliance J2 is connect with the normally opened contact of three-phase contactor KM, and is connect with the normally open end for opening button SB3 firmly；It exchanges defeated
The normally opened contact of type solid-state relay J2 is connect with the stationary contact of three-phase contactor KM out, and with the stationary contact that opens button SB3 firmly
Connection, the stationary contact for opening button SB3 firmly also pass through the coil of three-phase contactor KM and connect N phase.Hard stop button SB4 and open phase protector
The normally opened contact of J1 is sequentially connected in series between the normally open end for opening button SB3 firmly and the normally-closed contact of electromagnetic relay J4, is exchanged defeated
The normally opened contact of type solid-state relay J3 connects N phase out, and stationary contact connects electromagnetic relay J4's by the coil of electromagnetic relay J4
Stationary contact is simultaneously connected to R phase；Exchange output type solid-state relay J3 coil be series at triode Q2 collector and power supply it
Between.Wherein, button SB3 is opened firmly: for sending hard reboot control command.Hard stop button SB4: for sending hard stop order
Set potentiometer RP1, pair of output voltage and soft-start time in control circuit provided herein
Should be related to is: potentiometer output voltage is bigger, and soft-start time is longer, and when potentiometer output voltage is 0V, soft-start time is
Default value 5s, when potentiometer output voltage reaches maximum value 5V, corresponding soft-start time is 25s.
Above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, those of ordinary skill in the art couple
The modification or equivalent replacement that the technical solution of the utility model is made, without departing from the spirit of the technical solution of the utility model
And range, it is encompassed by the scope of the claims of the utility model.
Claims (10)
1. a kind of Multifunctional three-phase AC asynchronous motor soft start controls box, it is characterised in that: the control box includes hollow shell
Body, temperature switch (10), three-phase synchronous transformer (11), three-phase phase shifting pressure regulation trigger module (12), is handed over control circuit board (9)
Flow silicon controlled module (13), power relay (14), three-phase ac contactor (15), open phase protector (16), time setting electricity
Position device (17), binding post (20) and junction board (21)；Wherein, the control circuit board (9), the temperature switch (10), described
Three-phase synchronous transformer (11), the three-phase phase shifting pressure regulation trigger module (12), the ac thyristor module (13), the function
Rate relay (14), the three-phase ac contactor (15) and the open phase protector (16) be installed in the hollow shell body and
Electrical connection between each other, time setting potentiometer (17), the binding post (20) and the junction board (21) are laid in institute
On the outer surface for stating cavity shell, time setting potentiometer (17), the binding post (20) and the junction board (21) point
It is not electrically connected with control circuit board (9).
2. Multifunctional three-phase AC asynchronous motor soft start according to claim 1 controls box, it is characterised in that: described
Cavity shell is mainly by the assembled structure of bottom plate (1), front panel (2), rear panel (3), left panel (4), right panel (5) and cover board (8)
At.
3. Multifunctional three-phase AC asynchronous motor soft start according to claim 2 controls box, it is characterised in that: also wrap
It includes mounting rack (6), the mounting rack (6) is installed in the hollow shell body and is located at the left panel (4) and the right panel
(5) between.
4. Multifunctional three-phase AC asynchronous motor soft start according to claim 3 controls box, it is characterised in that: three-phase
Synchrotrans (11) and three-phase phase shifting pressure regulation trigger module (12) are installed on mounting rack (6).
5. Multifunctional three-phase AC asynchronous motor soft start according to claim 4 controls box, it is characterised in that: described
Control circuit board (9) is installed on the top of the bottom plate (1) by support column (7).
6. Multifunctional three-phase AC asynchronous motor soft start according to claim 5 controls box, it is characterised in that: described
Temperature switch (10), the ac thyristor module (13), the power relay (14), the three-phase ac contactor (15)
It is installed on the bottom plate (1) with the open phase protector (16).
7. Multifunctional three-phase AC asynchronous motor soft start described in -6 any one controls box according to claim 1, special
Sign is: further including band lamp button switch (18) and/or the indicator light (19) being laid in the cavity housing outer surface.
8. a kind of control box for Multifunctional three-phase AC asynchronous motor soft start described in claim 1-7 any one
Control circuit, it is characterised in that: the circuit include phase-shift voltage regulating trigger, rectified three-phase circuit, temperature signal input circuit,
MCU minimum system, time setting circuit, relay drive circuit and open phase protector；It includes three that the phase shift, which adjusts trigger,
Be synchronised transformer, three-phase phase shifting pressure regulation trigger module and ac thyristor module, the input terminal of the three-phase synchronous transformer
Connecing three phase mains, output end is respectively connected to the three-phase phase shifting pressure regulation trigger module and the rectified three-phase circuit, and described three
The output end of commutating phase circuit provides operating voltage for MCU minimum system；The signal of the temperature signal input circuit and described
The output signal that circuit is arranged in time inputs the MCU minimum system, and the voltage output end of the MCU minimum system is connected to institute
State the input terminal of three-phase phase shifting pressure regulation trigger module, the control terminal of the relay drive circuit and the MCU minimum system
Signal output end connection；One termination three phase mains of the ac thyristor module, another termination open phase protector are described
Open phase protector is also connect with the MCU minimum system.
9. control circuit according to claim 8, it is characterised in that: further include being connected with the MCU minimum system
Failure alarm circuit.
10. control circuit according to claim 8 or claim 9, it is characterised in that: it further include opening/stopping control circuit firmly, it is described hard
It opens/stops control circuit and the MCU minimum system is connected to by the relay drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820926902.1U CN208257693U (en) | 2018-06-15 | 2018-06-15 | Multifunctional three-phase AC asynchronous motor soft start controls box and its control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820926902.1U CN208257693U (en) | 2018-06-15 | 2018-06-15 | Multifunctional three-phase AC asynchronous motor soft start controls box and its control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208257693U true CN208257693U (en) | 2018-12-18 |
Family
ID=64654615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820926902.1U Active CN208257693U (en) | 2018-06-15 | 2018-06-15 | Multifunctional three-phase AC asynchronous motor soft start controls box and its control circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN208257693U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904858A (en) * | 2019-04-19 | 2019-06-18 | 福建典力节能科技有限公司 | Can the electrification of automatic Regulation and automatic gauge switch electric control appliance |
-
2018
- 2018-06-15 CN CN201820926902.1U patent/CN208257693U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904858A (en) * | 2019-04-19 | 2019-06-18 | 福建典力节能科技有限公司 | Can the electrification of automatic Regulation and automatic gauge switch electric control appliance |
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