CN207504787U - Low-voltage motor control system - Google Patents
Low-voltage motor control system Download PDFInfo
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- CN207504787U CN207504787U CN201721475531.1U CN201721475531U CN207504787U CN 207504787 U CN207504787 U CN 207504787U CN 201721475531 U CN201721475531 U CN 201721475531U CN 207504787 U CN207504787 U CN 207504787U
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- control circuit
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- soft
- voltage motor
- control system
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- 239000007858 starting material Substances 0.000 claims abstract 4
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 claims description 3
- 230000008450 motivation Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model discloses a low-voltage motor control system, the system includes soft start control scheme and thermal relay control scheme, soft start control scheme include soft starter RQ and contactor KM1, three-phase alternating current power supply's input pass through circuit breaker QF with soft starter RQ is connected, soft starter RQ pass through contactor KM1 and be connected with low-voltage motor M; the two ends of the soft start control circuit are connected with the thermal relay control circuit in parallel, the thermal relay control circuit comprises a thermal relay E3 Plus and a contactor KM2, and the thermal relay control circuit is connected with the low-voltage motor M through the contactor KM 2. The low-voltage motor is controlled to operate by arranging the two soft start control circuits and the thermal relay control circuit which are connected in parallel, and when a certain control circuit breaks down, switching can be performed, so that continuous operation of the low-voltage motor is guaranteed.
Description
Technical field
The utility model is related to motor control technology field, more particularly to a kind of low voltage motor control system.
Background technology
In metallurgy industry, low voltage motor control be widely used in entire automatic control system it is general, be composition from
Most basic execution unit in dynamic networked control systems.The stabilization of low voltage motor control, reliability service are also entire automation control
The important measurement index of system stability, reliability.In normal productive process, how to avoid leading to electricity because of soft strater failure
It is problem to be solved that machine, which can not operate,.
Invention content
The purpose of this utility model is to provide a kind of low voltage motor control system, with solve it is above-mentioned exist in the prior art because
The problem of soft strater failure causes motor that can not operate.
The utility model provides a kind of low voltage motor control system, the system comprises soft start control circuit and heat after
Electrical control circuit, the soft start control circuit include soft strater RQ and contactor KM1, the input of three-phase alternating-current supply
End is connect by circuit breaker Q F with the soft strater RQ, and the soft strater RQ passes through the contactor KM1 and low pressure
Motor M connections；The soft start control circuit both ends electrothermal relay control circuit in parallel, the electrothermal relay control
Circuit include electrothermal relay E3Plus and contactor KM2, the electrothermal relay control circuit by the contactor KM2 with it is described
Low-tension motor M connections.
Wherein, the soft strater RQ and electrothermal relay E3Plus are connected with CPU.
Wherein, connections and the CPU phase of the soft strater RQ and electrothermal relay E3Plus by device network
Even.
Wherein, the CPU and server communication connects, for by the data of the startup of low-tension motor M and starting number
Amount data are uploaded in the server.
Wherein, the server is remote server.
Wherein, the server is arranged in monitoring room.
Wherein, the CPU is connect with the server by wired mode or wireless mode.
Wherein, it after the low-tension motor M starts under the control of soft strater RQ, after the scheduled duration that is delayed, is switched to
Electrothermal relay control circuit takes over control, and stops soft strater RQ.
Wherein, if breaking down in electrothermal relay control circuit operating, it is described low that soft strater RQ controls are switched to
Piezoelectricity motivation M is run.
Wherein, it if the soft strater RQ breaks down, is switched to electrothermal relay control circuit and controls the low-pressure electric
Machine M is run.
Compared with prior art, the beneficial effects of the utility model are：By set soft start control circuit in parallel and
Electrothermal relay control circuit carries out operation control to low-tension motor, when a certain control circuit breaks down, Ke Yijin
Row switching, so electrothermal relay control circuit control low voltage motor can be switched to during soft strater failure, it is low so as to ensure
Piezoelectricity motivation remains in operation.
Description of the drawings
Fig. 1 is the low voltage motor control system architecture schematic diagram that the utility model embodiment provides；
Fig. 2 is the low voltage motor control logic block diagram that the utility model embodiment provides.
Specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that this place
The specific embodiment of description is only used to explain the utility model, is not used to limit the utility model.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the application can phase
Mutually combination.
The utility model provides a kind of low voltage motor control system, which realizes the soft strater and heat of motor device
Relay dual-control loop realizes the switching undisturbed of two control loops, ensure that the stabilization of important motor device operation.
Embodiment 1
As shown in Figure 1, for the low voltage motor control system architecture schematic diagram that embodiments herein 1 provides, wherein, Fig. 1
In, QF represents breaker, and RQ represents soft strater, and KM1, KM2 represent contactor, and E3Plus represents electrothermal relay；M represents low pressure
Motor.
A kind of low voltage motor control system is present embodiments provided, the system comprises soft start control circuits and hot relay
Device control circuit, the soft start control circuit include soft strater RQ and contactor KM1, the input terminal of three-phase alternating-current supply
It is connect by circuit breaker Q F with the soft strater RQ, the soft strater RQ passes through the contactor KM1 and low tension
Motivation M connections；The soft start control circuit both ends electrothermal relay control circuit in parallel, the electrothermal relay control line
Road include electrothermal relay E3Plus and contactor KM2, the electrothermal relay control circuit by the contactor KM2 with it is described low
The M connections of piezoelectricity motivation.
It should be noted that it is in parallel to present embodiments provide a kind of soft start control circuit and electrothermal relay control circuit
Structure, logical two controllers of soft strater RQ and electrothermal relay E3Plus control two contactors KM1, KM2 low to one respectively
Piezoelectricity motivation M powers, and realizes the dual-control loop of an equipment, using the parallel-connection structure circuit to low-tension motor M into
Row control, when a certain control circuit failure, can be switched on another circuit and low-tension motor M is controlled, from
And the continuous service of low-tension motor M is realized, improve operating efficiency.
Embodiment 2
On the basis of embodiment 1, in order to optimize control to soft start control circuit and electrothermal relay control circuit,
The soft strater RQ and electrothermal relay E3Plus are connected by the connection of device network with the CPU, by CPU into
Row control realizes the switching undisturbed of two control loops, ensure that the stabilization of important equipment operation.
Embodiment 3
On the basis of embodiment 2, the CPU is connected with server communication, by the log-on data of low-tension motor M
It is uploaded in the server, the data received by server storage are monitored equipment operation condition.
Embodiment 4
On the basis of embodiment 3, the server is set as remote server, consequently facilitating be remotely monitored,
Without being monitored at the scene, human cost and time cost can be saved, improves the efficiency of monitoring.
Embodiment 5
On the basis of embodiment 4, the server is arranged in monitoring room, so as to which monitoring personnel is in monitoring room
It is interior data to be monitored, improve the comfort being monitored using server.
Embodiment 6
On the basis of embodiment 4, the CPU and the server are connected by wired mode or wireless mode
It connects, so as to be configured according to practical application environment, the use demand of various environment can be met.
Embodiment 7
As shown in Fig. 2, on the basis of embodiment 1, for the ease of being manipulated to the low-tension motor M in the application,
This embodiment offers a kind of control modes of low-tension motor M, and first, the low-tension motor M is in the control of soft strater RQ
After the lower startup of system, after the scheduled duration that is delayed, the scheduled duration was set in 1 minute, for example can be 10 seconds or 1 minute,
The operating of control low-tension motor M is taken over by electrothermal relay control circuit, and stops soft strater RQ.The present embodiment realizes low
The Redundant Control of Medium-voltage Motor, in normal course of operation, electrothermal relay control circuit can control operation production to avoid because of soft strater
Raw harmonic wave, soft strater control circuit only work in starting and stopping, thyristor can be made to generate heat to avoid longtime running, prolonged
Service life is grown.
Embodiment 8
As shown in Fig. 2, on the basis of embodiment 1, for the ease of being manipulated to the low-tension motor M in the application,
This embodiment offers the control mode of another low-tension motor M, in electrothermal relay control circuit control low-tension motor M fortune
During row, if the electrothermal relay control circuit breaks down, the M controls of control low-tension motor are taken over by soft start control circuit
System operation.
Embodiment 9
On the basis of embodiment 1, for the ease of being manipulated to the application, this embodiment offers another low tensions
The control mode of motivation M first starts usually using soft start control circuit, then, by preset duration, when such as 1 minute,
The mode of electrothermal relay control circuit control operation is switched to, when soft start control circuit breaks down, by hot relay
Device control circuit directly controls startup.
In above-described embodiment 7,8,9, control system includes soft start control circuit and electrothermal relay control circuit, and three is intersecting
The input terminal in galvanic electricity source is connect by circuit breaker Q F with soft strater RQ, and soft strater RQ passes through contactor K1 and low-tension motor
M connections, soft strater can play the role of soft start and soft stop, and soft strater only changes output voltage, does not change frequency, that is, not
Change the synchronous rotational speed on motor operation curve, but increase the steepness of the curve, motor characteristic is made to soften, passes through soft strater
Achieve the purpose that start motor.After scheduled duration is started, such as 1 minute, it is switched to electrothermal relay control circuit and is controlled,
And stop soft strater, continued to control the operating of low-tension motor M by electrothermal relay control circuit.When electrothermal relay control circuit
During failure, soft start control circuit is put back into.In the case that another kind is soft start control circuit failure, by hot relay
Device control circuit directly controls startup.
The above is only the preferred embodiment of the utility model, it is noted that for the general of the art
For logical technical staff, under the premise of the utility model principle is not departed from, several improvements and modifications can also be made, these change
The scope of protection of the utility model is also should be regarded as into retouching.
Claims (10)
1. a kind of low voltage motor control system, which is characterized in that the system comprises soft start control circuits and electrothermal relay control
Circuit processed, the soft start control circuit include soft strater (RQ) and contactor (KM1), the input terminal of three-phase alternating-current supply
It is connect by breaker (QF) with the soft strater (RQ), the soft strater (RQ) passes through the contactor (KM1)
It is connect with low-tension motor (M)；The soft start control circuit both ends electrothermal relay control circuit in parallel, the heat after
Electrical control circuit includes electrothermal relay (E3Plus) and contactor (KM2), and the electrothermal relay control circuit is connect by described
Tentaculum (KM2) is connect with the low-tension motor (M).
2. low voltage motor control system according to claim 1, which is characterized in that the soft strater (RQ) and heat after
Electric appliance (E3Plus) is connected with CPU.
3. low voltage motor control system according to claim 2, which is characterized in that the soft strater (RQ) and heat after
Electric appliance (E3Plus) is connected by the connection of device network with the CPU.
4. low voltage motor control system according to claim 2, which is characterized in that the CPU is connected with server communication,
For the data of the startup of low-tension motor (M) to be uploaded in the server.
5. low voltage motor control system according to claim 4, which is characterized in that the server is remote server.
6. low voltage motor control system according to claim 4, which is characterized in that the server is arranged on monitoring room
It is interior.
7. low voltage motor control system according to claim 4, which is characterized in that the CPU passes through with the server
Wired mode or wireless mode connection.
8. low voltage motor control system according to claim 1, which is characterized in that the low-tension motor (M) is opened soft
After starting under the control of dynamic device (RQ), after the scheduled duration that is delayed, it is switched to electrothermal relay control circuit and takes over control, and stop soft
Starter (RQ).
9. low voltage motor control system according to claim 1, which is characterized in that if the electrothermal relay control circuit is transported
It breaks down in turning, is switched to soft strater (RQ) and controls low-tension motor (M) operation.
10. low voltage motor control system according to claim 1, which is characterized in that if the soft strater (RQ) occurs
Failure is switched to electrothermal relay control circuit and controls low-tension motor (M) operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721475531.1U CN207504787U (en) | 2017-11-08 | 2017-11-08 | Low-voltage motor control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721475531.1U CN207504787U (en) | 2017-11-08 | 2017-11-08 | Low-voltage motor control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207504787U true CN207504787U (en) | 2018-06-15 |
Family
ID=62503276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721475531.1U Active CN207504787U (en) | 2017-11-08 | 2017-11-08 | Low-voltage motor control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207504787U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889104A (en) * | 2019-04-25 | 2019-06-14 | 高松锋 | Voltage shock avoiding soft starter device |
| CN111009964A (en) * | 2019-12-27 | 2020-04-14 | 株洲中车特种装备科技有限公司 | Rescue system for monorail tourist bus |
-
2017
- 2017-11-08 CN CN201721475531.1U patent/CN207504787U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889104A (en) * | 2019-04-25 | 2019-06-14 | 高松锋 | Voltage shock avoiding soft starter device |
| CN111009964A (en) * | 2019-12-27 | 2020-04-14 | 株洲中车特种装备科技有限公司 | Rescue system for monorail tourist bus |
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