CN216959700U - Motor control device - Google Patents
Motor control device Download PDFInfo
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- CN216959700U CN216959700U CN202220710746.1U CN202220710746U CN216959700U CN 216959700 U CN216959700 U CN 216959700U CN 202220710746 U CN202220710746 U CN 202220710746U CN 216959700 U CN216959700 U CN 216959700U
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Abstract
An embodiment of the present invention provides a motor control device, including: the power supply is connected with the motor through the soft starter and is also connected with the motor through a power supply branch capable of being switched on and off; the first on-off control branch is arranged on the power supply side of the power supply and used for controlling the on-off of the power supply branch; the control loop is connected with the soft starter and the power supply and is used for controlling the starting and stopping of the motor through the soft starter; and the second on-off control branch is connected with the control loop in parallel and is used for controlling the on-off of the control loop. The motor control device has the advantages of simple structure, capability of reducing manpower, increasing the convenience of control, simultaneously improving the operation safety performance and playing a better protection role for other electric equipment on a line.
Description
Technical Field
The utility model relates to the technical field of motor control, in particular to a motor control device.
Background
The motor has wide application in daily production and life, wherein, for some high-power motors, when the power line is longer, the capacity of a power supply side transformer is not large enough, or a power distribution bus is connected with loads sensitive to voltage fluctuation, such as illumination and the like, a direct starting mode is not suitable to be adopted, the impact of direct starting on a power distribution system is large, and the voltage fluctuation can influence other electric equipment in the system, so that the motor soft start control device is designed to realize on-site and remote switching control.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model aims to provide a motor control device, which is used for solving the problem that voltage fluctuation influences other electric equipment in a system due to large impact of a direct starting motor on a power distribution system.
In order to achieve the above object, an embodiment of the present invention provides a motor control device, including:
the power supply is connected with the motor through the soft starter and is also connected with the motor through a power supply branch capable of being switched on and off;
the first on-off control branch is arranged on the power supply side of the power supply and used for controlling the on-off of the power supply branch;
the control loop is connected with the soft starter and the power supply and is used for controlling the starting and stopping of the motor through the soft starter;
and the second on-off control branch is connected with the control loop in parallel and is used for controlling the on-off of the control loop.
Optionally, the power supply is a three-phase power supply, and the first on-off control branch is arranged between two live wires of the power supply.
Optionally, an intermediate relay K is arranged at the bypass output end of the soft starterATSAn intermediate relay K is arranged on the first on-off control branch in seriesATSNormally open contact K ATS1 and a contactor KM;
and a normally open auxiliary contact KM1 of the contactor KM is connected in series on the power supply branch.
Optionally, an intermediate relay K is connected in series to the second on-off control branchATSNormally closed contact K ofATS2 and relay K1.
Optionally, the control loop includes:
the branch circuit selection unit, the manual control branch circuit and the automatic control branch circuit are connected in parallel;
the manual control branch and the automatic control branch are not conducted at the same time and are used for controlling the starting and stopping of the motor through the soft starter;
and the branch selecting unit is used for controlling the on-off of the manual control branch and the automatic control branch.
Optionally, the branch selecting unit is a switch S1, an input end of the switch S1 is connected to the live wire of the power supply, the switch S1 has a first output end and a second output end, the manual control branch is connected to the first output end of the switch S1, and the automatic control branch is connected to the second output end of the switch S1.
Optionally, a first switch group SB1 and a second switch group SB2 are arranged in series on the manual control branch;
the first switch group SB1 comprises two normally closed push-button switches connected in series;
the second switch set SB2 includes two normally open push-button switches connected in parallel.
Optionally, the automatic control branch comprises a relay K2, and the relay K2 is remotely controlled by a PLC controller or a DCS controller.
Optionally, the control loop further includes:
a normally open contact K11 and a relay K3 of a relay K1 which are arranged in series, wherein the input end of the normally open contact K11 is connected with the common end of the manual control branch and the automatic control branch; the output end of the relay K3 is connected with a zero line of the power supply;
the starting input end of the soft starter is connected with a normally open contact K31 of a relay K3;
and the two ends of the second switch group SB2 are connected in parallel with a normally open contact K32 of a relay K3.
Optionally, the motor control device further includes: the indicating lamp loop is connected with the control loop in parallel;
the indicator light circuit includes: the first indication branch, the second indication branch, the third indication branch and the fourth indication branch are connected in parallel;
the first indication branch is used for indicating the on-off state of the control loop, and a normally open contact K33 of a relay K3 and an indicator lamp HL1 are arranged on the first indication branch in series;
the second indication branch is used for indicating the on-off state of the control loop, and a normally closed contact K34 of a relay K3 and an indicator lamp HL2 are arranged on the second indication branch in series;
the third indicating branch is used for indicating the on-off state of the second on-off control branch, and a normally closed contact K12 of a relay K1 and an indicator lamp HL3 are connected in series on the third indicating branch;
the fourth indication branch is used for indicating the on-off state of a power supply, and an indication lamp HL4 is arranged on the fourth indication branch.
This application realizes the soft start to the motor through combining soft starter, and simple structure can reduce the manpower, increases the convenient degree of control, has improved the operation security performance simultaneously, plays better guard action to other consumer on the circuit.
Additional features and advantages of embodiments of the utility model will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the embodiments of the utility model without limiting the embodiments of the utility model. In the drawings:
fig. 1 is a schematic structural diagram of a motor control device provided by the present invention;
fig. 2 is a schematic diagram of a specific structure of the motor control device provided by the utility model.
Description of the reference numerals
1-a power supply; 2-a soft starter, 3-a motor;
4-a power supply branch; 5-a first on-off control branch; 6-a control loop;
7-a second on-off control branch; 61-a branch selection unit; 62-manual control branch;
63-automatic control branch; 81-first indicating branch; 82-a second indicating branch;
83-third indication branch; 84-fourth indicating branch.
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the utility model, are given by way of illustration and explanation only, not limitation.
In the embodiments of the present invention, unless otherwise specified, the use of the directional terms such as "upper, lower, left, and right" generally refers to the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when they are used.
The terms "first," "second," "third," and the like are used solely to distinguish one from another as to indicate or imply relative importance.
The terms "parallel", "perpendicular", etc. do not require that the components be absolutely parallel or perpendicular, but may be slightly inclined. For example, "parallel" merely means that the directions are more parallel relative to "perpendicular," and does not mean that the structures are necessarily perfectly parallel, but may be slightly tilted.
The terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal, vertical or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
Furthermore, the terms "substantially", and the like are intended to indicate that the relative terms are not necessarily strictly required, but may have some deviation. For example: "substantially equal" does not mean absolute equality, but it is difficult to achieve absolute equality in actual production and operation, and certain deviations generally exist. Thus, in addition to absolute equality, "substantially equal" also includes the above-described case where there is some deviation. In this case, unless otherwise specified, terms such as "substantially", and the like are used in a similar manner to those described above.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is a schematic structural diagram of a motor control device provided by the present invention; fig. 2 is a schematic diagram of a specific structure of the motor control device provided by the utility model. As shown in fig. 1 and 2, the present embodiment provides a motor control device including:
the power supply system comprises a power supply 1, wherein the power supply 1 is connected with a motor 3 through a soft starter 2, and the power supply 1 is also connected with the motor 3 through a power supply branch 4 which can be switched on and off;
the first on-off control branch 5 is arranged on the power supply side of the power supply 1 and is used for controlling the on-off of the power supply branch 4;
the control loop 6 is connected with the soft starter 2 and the power supply 1 and is used for controlling the start and stop of the motor 3 through the soft starter 2;
and the second on-off control branch 7 is connected with the control loop 6 in parallel and is used for controlling the on-off of the control loop 6.
Specifically, in this embodiment, after the control loop 6 is connected, the control loop 6 sends a corresponding start model to the soft starter 2, and the soft starter 2 implements soft start on the motor 3, in the soft start process, when the motor meets a soft start condition, the soft starter 2 controls the first on-off control branch 5 to be connected and the second on-off control branch 7 to be disconnected, and after the first on-off control branch 5 is connected, the power supply branch 4 is controlled to be connected, so as to implement start of the motor; the soft starter is usually started by slope voltage and can also be started by sudden jump, the starting current and the starting torque are adjustable, the soft starter has various control modes, can be provided with various protections, has higher allowable starting times and can play a better protection role on the motor. The CL1 point of the soft starter 2 is connected to the live line of the power supply 1, and can also be understood as being connected to the input end of the control circuit 6, the CL2 point of the soft starter 2 is connected to the zero line of the power supply 1, and can also be understood as being connected to the output end of the control circuit 6,
in addition, a fuse FU1 is arranged between the power supply 1 and the power supply branch 4, a fuse FU2 is also arranged between the power supply 1 and the control circuit 6, and the fuse FU can limit the maximum current passing through the circuit and protect each device in the circuit from overcurrent. The input end of the power supply 1 is also provided with a breaker QF, and the on-off of the power supply in the control device can be realized through the on-off of the breaker QF.
In another embodiment, the control device further comprises a phase-loss protector, which is arranged at the output end of the power supply 1, and the phase-loss protector can cut off the loop to protect the motor and the like in the loop when the power supply has a phase loss. The control device also comprises a digital display electrical measuring instrument, and a power supply branch 4 of the digital display electrical measuring instrument is used for acquiring and displaying the voltage and the current of the two sides of the click in real time.
Further, the power supply 1 is a three-phase power supply, and the first on-off control branch 5 is arranged between two live wires of the power supply 1.
Specifically, the power supply 1 includes live wires L1, L2, and L3, and in this embodiment, one end of the first on-off control branch 5 is connected to the live wire L1, and the other end of the first on-off control branch 5 is connected to the live wire L3.
Further, it is characterized byThe bypass output end of the soft starter 2 is provided with an intermediate relay KATSAn intermediate relay K is connected in series on the first on-off control branch 5ATSNormally open contact K ATS1 and a contactor KM;
and a normally open auxiliary contact KM1 of the contactor KM is connected in series on the power supply branch 4.
In particular, the intermediate relay KATSCan pass through the control of normally open contact KATSThe switching of 1 realizes the control of the first on-off control branch 5, thereby realizing the control of the power-on and power-off of the coil of the contactor KM. More specifically, the intermediate relay KATSTwo ends connected with normally open contact K ATS1 is closed, so that the contactor KM is electrified, and the normally open auxiliary contact KM1 is closed.
Further, an intermediate relay K is connected in series to the second on-off control branch 7ATSNormally closed contact K ofATS2 and relay K1.
In particular, the intermediate relay KATSCan be controlled by controlling a normally closed contact KATSThe opening and closing of 2 effects the control of the second on-off control branch 7 and thus the control of the energization and de-energization of the coil of the relay K1. More specifically, the intermediate relay KATSTwo ends are connected with a normally closed contact K ATS2 open, causing relay K1 to de-energize.
Further, the control circuit 6 includes:
a branch selecting unit 61, a manual control branch 62 and an automatic control branch 63 which are connected in parallel;
the manual control branch 62 and the automatic control branch 63 are not conducted at the same time and are used for controlling the starting and stopping of the motor 3 through the soft starter 2;
the branch selecting unit 61 is used for controlling the on-off of the manual control branch 62 and the automatic control branch 63.
Specifically, the control circuit 6 includes a branch selecting unit 61, a manual control branch 62 and an automatic control branch 63 that are connected in parallel, and the branch selecting unit 61 can switch the manual control branch 62 and the automatic control branch 63 to realize soft start of the motor 3, and the manual control branch 62 and the automatic control branch 63 are not conducted at the same time, and can only realize start of the motor 3 by one of the modes. The manual control branch 62 can be located on site and operated manually by an operator; the automatic control branch 63 may be arranged in the background, operated manually by an operator or remotely and automatically controlled by a control system. And manual control and automatic control modes are adopted, so that the use is flexible, and the control is convenient to realize.
Further, the branch selecting unit 61 is a switch S1, an input end of the switch S1 is connected to the live wire of the power supply 1, the switch S1 has a first output end and a second output end, the manual control branch 62 is connected to the first output end of the switch S1, and the automatic control branch 63 is connected to the second output end of the switch S1.
Further, a first switch group SB1 and a second switch group SB2 are arranged in series on the manual control branch 62;
the first switch group SB1 comprises two normally closed button switches connected in series;
the second switch set SB2 includes two normally open push-button switches connected in parallel.
Specifically, because manual control branch 62 sets up and is carried out manual operation by operating personnel on the scene, realize opening the function of stopping on the spot, consequently, there is a certain degree of maloperation, in order to avoid this type of maloperation to cause the safety in production accident, set up a switch block SB1 and second switch block SB2 on manual control branch 62, and first switch block SB1 includes the normally closed button switch of two series connections, and second switch block SB2 includes the normally open button switch of two parallelly connected, is regarded as start button and stop button respectively. The redundancy sets up two sets of switches, mutually supports, can reduce the potential safety hazard, improves the operational safety. When power-off is needed, the second switch group SB2 comprising two parallel normally open push-button switches is closed, so that the control loop 6 can not be powered off when one of the switches is switched off by misoperation.
Further, the automatic control branch 63 includes a relay K2, and the relay K2 is remotely controlled by a PLC controller or a DCS controller.
Specifically, relay K2 is replaced with one contact and is remotely controlled by an LC controller or DCS controller. In another embodiment, a time-controlled switch has also been substituted to effect timed starting of the motor.
Further, the control circuit 6 further includes:
a normally open contact K11 and a relay K3 of a relay K1 which are arranged in series, wherein the input end of the normally open contact K11 is connected with the common end of the manual control branch circuit 62 and the automatic control branch circuit 63; the output end of the relay K3 is connected with a zero line of the power supply 1;
the starting input end of the soft starter 2 is connected with a normally open contact K31 of a relay K3;
and the two ends of the second switch group SB2 are connected in parallel with a normally open contact K32 of a relay K3.
Specifically, when the breaker QF of the circuit is turned on, the second on/off control branch 7 is turned on, the coil of the relay K1 is energized, the normally open contact K11 of the relay K1 is closed as a prerequisite for the conduction of the control circuit 6, and at this time, the starting mode (manual starting or automatic control starting) is determined by the selector switch, and one of the manual control branch 62 or the automatic control branch 63 is turned on. Taking manual start as an example: the operation switch group SB2 is closed, so that the control circuit 6 is switched on, the coil of the relay K3 is electrified, the corresponding normally open contact K31 and the normally open contact K32 are closed, the signals are given to the soft starter 2, the motor 3 is controlled to be in soft start, and when the starting condition is met, the intermediate relay K is used for switching on the control circuitATSCoil of (2) connecting with electricity, normally open contact K ATS1 is closed, the coil of the contactor KM is connected with electricity, the corresponding normally open contact KM1 is controlled to be switched on, the motor 3 is electrified by the connection, the soft start of the motor 3 is realized, and meanwhile, the normally open close point K is connectedATS2 are opened, thereby realizing the opening of the control loop 6 and the second opening control branch 7.
Further, the motor control device further includes: an indicator light circuit 8 connected in parallel with the control circuit 6;
the indicator light circuit 8 comprises: a first indicating branch 81, a second indicating branch 82, a third indicating branch 83 and a fourth indicating branch 84 which are connected in parallel with each other;
the first indicating branch 81 is used for indicating the on-off state of the control loop 6, and a normally open contact K33 of a relay K3 and an indicating lamp HL1 are arranged on the first indicating branch 81 in series;
the second indicating branch 82 is used for indicating the on-off state of the control circuit 6, and a normally closed contact K34 of a relay K3 and an indicator lamp HL2 are arranged on the second indicating branch 82 in series;
the third indicating branch 83 is used for indicating the on-off state of the second on-off control branch 7, and a normally closed contact K12 of a relay K1 and an indicator lamp HL3 are connected in series to the third indicating branch 83;
the fourth indication branch 84 is used for indicating the on-off state of a power supply, and an indication lamp HL4 is arranged on the fourth indication branch 84.
Specifically, the indicator light circuit 8 includes a first indicating branch 81, a second indicating branch 82, a third indicating branch 83, and a fourth indicating branch 84, which are connected in parallel to each other, and are respectively used for indicating on/off of each indicating branch. A normally open contact K33 of a relay K3 and an indicator lamp HL1 are arranged on the first indicating branch 81 in series, and when the control loop 6 is switched on, the indicator lamp HL1 is on; a normally closed contact K34 of a relay K3 and an indicator lamp HL2 are arranged on the second indicating branch 82 in series, and when the control circuit 6 is switched on, the indicator lamp HL2 is turned off and can be used for indicating that the motor is in soft start; a normally closed contact K12 of a relay K1 and an indicator lamp HL3 are arranged on the third indicating branch 83 in series, and when the second on-off control branch 7 is switched on, the indicator lamp HL3 is turned off; the fourth indicating branch 84 is directly connected with a live wire and a zero wire of a power supply, the on-off state of the power supply is indicated through an indicating lamp HL4, and the indicating lamp HL4 can be turned on as long as QF on the power supply is closed. In the present embodiment, the indicator lamp HL1, the indicator lamp HL2, the indicator lamp HL3, and the indicator lamp HL4 are all installed on the spot, and may be specifically installed in the control cabinet.
In another embodiment, in addition to being arranged on site, the indicator lights HL1, HL2, HL3 and HL4 can be additionally provided with a group of indicators arranged in a background monitoring room so as to directly obtain the control state in the background.
More specifically, the second switch group SB2 is of LA38-11-209 model, the change-over switch S1 is of LW12-16Z model, the indicator light is of AD16-22 model and is set to be red, yellow and green light colors respectively, the relay K1, the relay K2 and the relay K3 are of DRM270730 model, the breaker QF is of 1C65-1P model, the fuse FU1 and the fuse FU2 are of RT14-20 model, and the soft starter is of ATS48D62Q signal.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the utility model. In order to avoid unnecessary repetition, the embodiments of the present invention do not describe every possible combination.
Those skilled in the art will understand that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, any combination of various different implementation manners of the embodiments of the present invention can be made, and the embodiments of the present invention should also be regarded as the disclosure of the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.
Claims (10)
1. A motor control apparatus, comprising:
the power supply system comprises a power supply (1), wherein the power supply (1) is connected with a motor (3) through a soft starter (2), and the power supply (1) is also connected with the motor (3) through a power supply branch (4) which can be switched on and off;
the first on-off control branch (5) is arranged on the power supply side of the power supply (1) and is used for controlling the on-off of the power supply branch (4);
the control loop (6) is connected with the soft starter (2) and the power supply (1) and is used for controlling the start and stop of the motor (3) through the soft starter (2);
and the second on-off control branch (7) is connected with the control loop (6) in parallel and is used for controlling the on-off of the control loop (6).
2. The motor control device according to claim 1, characterized in that the power supply (1) is a three-phase power supply, and the first on-off control branch (5) is arranged between two live wires of the power supply (1).
3. A motor control arrangement according to claim 2, characterised in that the bypass output of the soft starter (2) is provided with an intermediate relay KATSAn intermediate relay K is connected in series on the first on-off control branch (5)ATSNormally open contact KATS1 and a contactor KM;
and a normally open auxiliary contact KM1 of the contactor KM is arranged on the power supply branch (4) in series.
4. A motor control arrangement according to claim 3, characterised in that an intermediate relay K is arranged in series on the second on-off control branch (7)ATSNormally closed contact K ofATS2 and relay K1.
5. The motor control device according to claim 4, characterized in that the control circuit (6) comprises:
the device comprises a branch selection unit (61), a manual control branch (62) and an automatic control branch (63) which are connected in parallel;
the manual control branch (62) and the automatic control branch (63) are not conducted at the same time and are used for controlling the starting and stopping of the motor (3) through the soft starter (2);
the branch selection unit (61) is used for controlling the on-off of the manual control branch (62) and the automatic control branch (63).
6. The motor control device of claim 5, wherein the branch selection unit (61) is a switch S1, an input terminal of the switch S1 is connected to the live line of the power supply (1), the switch S1 has a first output terminal and a second output terminal, the manual control branch (62) is connected to the first output terminal of the switch S1, and the automatic control branch (63) is connected to the second output terminal of the switch S1.
7. The motor control device according to claim 6, characterized in that a first switch group SB1 and a second switch group SB2 are arranged in series on the manual control branch (62);
the first switch group SB1 comprises two normally closed push-button switches connected in series;
the second switch set SB2 includes two normally open push-button switches connected in parallel.
8. The motor control device according to claim 7, characterized in that the automatic control branch (63) comprises a relay K2, the relay K2 being remotely controlled by a PLC controller or a DCS controller.
9. The motor control device according to claim 8, characterized in that the control circuit (6) further comprises:
a normally open contact K11 and a relay K3 of a relay K1 which are arranged in series, wherein the input end of the normally open contact K11 is connected with the common end of the manual control branch (62) and the automatic control branch (63); the output end of the relay K3 is connected with a zero line of the power supply (1);
the starting input end of the soft starter (2) is connected with a normally open contact K31 of a relay K3;
and a normally open contact K32 of a relay K3 is arranged at two ends of the second switch group SB2 in parallel.
10. The motor control apparatus according to claim 9, characterized by further comprising: an indicator light circuit (8) connected in parallel with the control circuit (6);
the indicator light circuit (8) comprises: a first indicating branch (81), a second indicating branch (82), a third indicating branch (83) and a fourth indicating branch (84) which are connected in parallel with each other;
the first indicating branch (81) is used for indicating the on-off state of the control loop (6), and a normally open contact K33 of a relay K3 and an indicating lamp HL1 are arranged on the first indicating branch (81) in series;
the second indicating branch (82) is used for indicating the on-off state of the control loop (6), and a normally closed contact K34 of a relay K3 and an indicator lamp HL2 are arranged on the second indicating branch (82) in series;
the third indicating branch (83) is used for indicating the on-off state of the second on-off control branch (7), and a normally closed contact K12 of a relay K1 and an indicator lamp HL3 are arranged on the third indicating branch (83) in series;
the fourth indicating branch (84) is used for indicating the on-off state of a power supply, and an indicating lamp HL4 is arranged on the fourth indicating branch (84).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220710746.1U CN216959700U (en) | 2022-03-29 | 2022-03-29 | Motor control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220710746.1U CN216959700U (en) | 2022-03-29 | 2022-03-29 | Motor control device |
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| Publication Number | Publication Date |
|---|---|
| CN216959700U true CN216959700U (en) | 2022-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220710746.1U Active CN216959700U (en) | 2022-03-29 | 2022-03-29 | Motor control device |
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| Country | Link |
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| CN (1) | CN216959700U (en) |
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