CN211046802U - Control circuit based on high-power motor soft start - Google Patents
Control circuit based on high-power motor soft start Download PDFInfo
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- CN211046802U CN211046802U CN201922476017.5U CN201922476017U CN211046802U CN 211046802 U CN211046802 U CN 211046802U CN 201922476017 U CN201922476017 U CN 201922476017U CN 211046802 U CN211046802 U CN 211046802U
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Abstract
The utility model provides a control circuit based on high-power motor soft start can provide local control mode through setting up local gate circuit, can provide remote control mode through setting up long-range gate circuit, and the field personnel can select the start-up or turn-off of remote control mode control motor, avoid the field personnel to go the field operation by the impact current injury that the motor produced in the moment of opening; by arranging the soft starter, the starting current of the motor can be reduced, the power distribution capacity is reduced, and capacity increase investment is avoided; the starting stress is reduced, and the service life of the motor and related equipment is prolonged; the motor can be smoothly started/stopped without steps, and the problems of mechanical and electrical impact and the like caused by starting the motor by adopting the traditional starting modes such as direct starting, star/triangle starting, self-coupling decompression starting and the like are avoided.
Description
Technical Field
The utility model relates to a motor start field especially relates to control circuit based on high-power motor soft start.
Background
At present, a high-power motor generates large current impact at the moment of starting or stopping, for example, direct-starting equipment such as a bucket elevator, a scalping machine, a rice machine, a polishing machine and a fan easily generates large impact current when the motor is started or stopped, the impact current easily damages the motor or a protection circuit breaker in a circuit, the service life of the equipment is shortened, and the impact current also can injure a human body when field personnel start or stop the equipment. Therefore, for solving above-mentioned problem, the utility model provides a control circuit based on high-power motor soft start through setting up soft starter, can reduce the starting current of motor, protective apparatus and field personnel to provide remote control's mode, further protect field personnel not influenced by impulse current.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a control circuit based on high-power motor soft start through setting up soft starter, can reduce the starting current of motor, protection equipment and field personnel to provide remote control's mode, further protect field personnel not influenced by impulse current.
The utility model has the technical proposal that the utility model provides a control circuit based on the soft start of a high-power motor, which comprises a P L C, a motor, a soft starter, a local gating circuit, a remote gating circuit and a main control circuit;
the input end of the local gating circuit and the input end of the remote gating circuit are respectively electrically connected with the power supply line, the output end of the local gating circuit and the output end of the remote gating circuit are respectively electrically connected with the input end of the main control circuit, the control end of the remote gating circuit is electrically connected with the output end of the P L C, the output end of the main control circuit is connected in series with a line between the power supply line and the motor, and the soft starter is connected in series with a line between the power supply line and the motor.
On the basis of the above technical solution, preferably, the local gating circuit includes a knob switch S1, a stop button S2 and a start button S3;
the knob switch S1 comprises a first normally open contact S1-1 and a second normally open contact S1-2;
the first normally open contact S1-1, the stop button S2, the start button S3 and the input end of the main control circuit are electrically connected in sequence.
Further preferably, the remote gating circuit comprises a second normally open contact S1-2, an intermediate relay KRA, a first normally open contact of the intermediate relay KRA, a second normally open contact of the intermediate relay KRA, a normally open contact of the relay KR and a normally open contact of the relay KR;
the first wiring end and the live wire electric connection of second normally open contact S1-2, the second wiring end of second normally open contact S1-2 passes through intermediate relay KRA and outside 0VAC power electric connection, the first wiring end and the live wire electric connection of intermediate relay KRA ' S first normally open contact, the second wiring end of intermediate relay KRA ' S first normally open contact passes through relay KR ' S normally open contact and main control circuit ' S input electric connection, relay KR and 0VDC power electric connection are passed through to P L C ' S output, intermediate relay KRA ' S second normally open contact and P L C ' S input electric connection.
Further preferably, the main control circuit comprises an output relay KQ, a normally open contact of the output relay KQ, an intermediate relay K1, a first normally open contact of an intermediate relay K1, a second normally open contact of an intermediate relay K1, a normally open contact of an alternating current contactor KM and a normally open contact of an alternating current contactor KM;
a first terminal of the output relay KQ is electrically connected with a live wire, a second terminal of the output relay KQ is electrically connected with a zero wire, a starting button S3 and a normally open contact of the relay KR are respectively electrically connected with a first terminal of the intermediate relay K1 through the normally open contact of the output relay KQ, and a second terminal of the intermediate relay K1 is electrically connected with the zero wire;
in the circuit between the first wiring end of intermediate relay K1 series connection live wire and ac contactor KM ' S first wiring end, ac contactor KM ' S second wiring end and zero line electric connection, intermediate relay K1 ' S second normally open contact connects in parallel at the both ends of start button S3, and ac contactor KM ' S normally open contact connects in parallel between soft starter ' S input and output.
Further preferably, the soft starter has the following types: TGS-030 Soft Starter;
l11, L12 and L13 of the TGS-030 soft starter are respectively electrically connected with three-phase power supply lines in a one-to-one correspondence manner, and U, V and W ports of the TGS-030 soft starter are respectively electrically connected with three-phase input ends of the motor in a one-to-one correspondence manner;
two ends of a normally open contact of the alternating current contactor KM are respectively connected in parallel between ports L11, L12, L13 and U, V, W.
On the basis of the technical scheme, the motor protection circuit breaker Q is preferably further included;
the motor protection circuit breaker Q is connected in series in the line between the supply line and the soft starter.
On the basis of the technical scheme, the intelligent power supply device preferably further comprises a current meter and a communication line;
the input end of the ammeter is connected in parallel in a line between the power supply line and the soft starter, and the output end of the ammeter is electrically connected with one end of the communication line.
Further preferably, the communication line is an RS485 shielded line.
The utility model discloses a control circuit based on high-power motor soft start has following beneficial effect for prior art:
(1) the local gating circuit is arranged to provide a local control mode, the remote gating circuit is arranged to provide a remote control mode, and field personnel can select the remote control mode to control the starting or the stopping of the motor, so that the damage of the field personnel caused by the impact current generated at the moment of starting the motor when the field personnel go to the field operation is avoided;
(2) the input end of the local gating circuit and the input end of the remote gating circuit are respectively and electrically connected with the power supply line, the output end of the local gating circuit and the output end of the remote gating circuit are respectively and electrically connected with the input end of the main control circuit, the control end of the remote gating circuit is electrically connected with the output end of the P L C, and the output end of the main control circuit is electrically connected with the motor starting circuit, so that the main control circuit is not controlled by the P L C, and a local control mode is provided through the local gating circuit, even if the P L C fails, the local control of the motor starting circuit can be realized through the local gating circuit, and the motor can run or be shut down;
(3) by arranging the soft starter, the starting current of the motor can be reduced, the power distribution capacity is reduced, and capacity increase investment is avoided; the starting stress is reduced, and the service life of the motor and related equipment is prolonged; the motor can be smoothly started/stopped without steps, and the problems of mechanical and electrical impact and the like caused by starting the motor by adopting the traditional starting modes such as direct starting, star-delta starting, self-coupling voltage reduction starting and the like are avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a structural diagram of a control circuit based on soft start of a high-power motor according to the present invention;
FIG. 2 is a wiring diagram of motor control in the control circuit based on the soft start of the high-power motor of the present invention;
fig. 3 is a wiring diagram of the local gating circuit, the remote gating circuit and the main control circuit in the control circuit based on the soft start of the high-power motor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
As shown in figure 1, the utility model discloses a control circuit based on high-power motor soft start, it includes P L C, the motor, the soft starter, local gate circuit, remote gate circuit and main control circuit, specific connection is that the input of local gate circuit and the input of remote gate circuit respectively with power supply line electric connection, the output of local gate circuit and the output of remote gate circuit respectively with main control circuit's input electric connection, remote gate circuit's control end and P L C's output electric connection, main control circuit's output is established ties in the circuit between power supply line and motor, the soft starter is established ties in the circuit between power supply line and motor.
In a further preferred embodiment, the local gate circuit provides a local control mode, and when the field technician selects the local control mode, the control motor is started and stopped no longer by means of P L C, and thus, the start and stop of the motor can be continued by the local gate circuit when P L C fails.
In this embodiment, the working principle of the local gating circuit is as follows: a field technician selects a local control mode by rotating the knob switch S1 and presses the start button S3, at the moment, a voltage signal on a bus reaches the input end of the main control circuit through the closed first normally open contact S1-1, the stop button S2 and the start button S3, so that the alternating current contactor KM of the main control circuit is electrified, the normally open contact of the alternating current contactor KM connected in series with the motor start circuit jumps from an original open state to a closed state, and the motor is electrified to run.
Further preferably, as shown in fig. 3, the remote gating circuit comprises a second normally open contact S1-2, an intermediate relay KRA, a first normally open contact of the intermediate relay KRA, a second normally open contact of the intermediate relay KRA, and normally open contacts of the relay KR and the relay KR, wherein the specific connection relationship is that a first terminal of the second normally open contact S1-2 is electrically connected with a live wire, a second terminal of the second normally open contact S1-2 is electrically connected with an external 0VAC power source through the intermediate relay KRA, a first terminal of the first normally open contact of the intermediate relay KRA is electrically connected with the live wire, a second terminal of the first terminal of the normally open contact of the intermediate relay KRA is electrically connected with an input end of the main control circuit through the normally open contact of the relay KR, an output end of the P L C is electrically connected with the 0VDC power source through the relay KR, and a second normally open contact of the intermediate relay KRA is electrically connected with an input end of the P L.
In the embodiment, the working principle of the remote gating circuit is that a field technician presses a second normally open contact S1-2 to select a remote control mode, at the moment, the intermediate relay KRA is electrified, the first normally open contact and the second normally open contact of the intermediate relay KRA are in a closed state through original open state jumping, P L C learns that the field technician selects the remote control mode, P L C energizes the relay KR, the normally open contact of the relay KR is in a closed state through original open state jumping, voltage on a live wire reaches the input end of the main control circuit through the first normally open contact of the closed intermediate relay KRA and the normally open contact of the relay KR, an alternating current contactor KM of the main control circuit is electrified, the first normally open contact and the second normally open contact of the alternating current contactor KM connected in series with the motor starting circuit are in a closed state through original open state jumping, and the motor is electrified and operates.
It is further preferred that the main control circuit can control the motor to be turned on or off whether the local gating circuit gates or the remote gating circuit gates, as long as the local gating circuit or the remote gating circuit can output a voltage signal to the input terminal of the main control circuit. In the present embodiment, as shown in fig. 3, the main control circuit includes an output relay KQ, a normally open contact of the output relay KQ, an intermediate relay K1, a first normally open contact of an intermediate relay K1, a second normally open contact of an intermediate relay K1, a normally open contact of an ac contactor KM, and a normally open contact of an ac contactor KM; the specific connection relationship is as follows: a first terminal of the output relay KQ is electrically connected with a live wire, a second terminal of the output relay KQ is electrically connected with a zero wire, a starting button S3 and a normally open contact of the relay KR are respectively electrically connected with a first terminal of the intermediate relay K1 through the normally open contact of the output relay KQ, and a second terminal of the intermediate relay K1 is electrically connected with the zero wire; in the circuit between the first wiring end of intermediate relay K1 series connection live wire and ac contactor KM ' S first wiring end, ac contactor KM ' S second wiring end and zero line electric connection, intermediate relay K1 ' S second normally open contact connects in parallel at the both ends of start button S3, and ac contactor KM ' S normally open contact connects in parallel between soft starter ' S input and output.
In this embodiment, the operating principle of the main control circuit is as follows: as shown in fig. 2, the local gate or the remote gate outputs a voltage signal to the normally open contact of the output relay KQ, meanwhile, a power supply line supplies power to the output relay KQ, a normally open contact of the output relay KQ jumps from an original open state to a closed state, a local gating circuit or a remote gating circuit can output a voltage signal to reach the intermediate relay K1 through the normally open contact of the closed output relay KQ, the intermediate relay K1 is electrified, a first normally open contact of the intermediate relay K1 and a second normally open contact of the intermediate relay K1 jump from the original open state to the closed state, at the moment, the second normally open contact of the intermediate relay K1 and the start button S3 form self-locking, and alternating current contactor KM is electrified, the normally open contact of alternating current contactor KM is closed, and at the moment, the voltage signal on the power supply line does not pass through the soft starter, but reaches the input end of the motor through the normally open contact of closed alternating current contactor KM.
More preferably, the soft starter is a TGS-030 soft starter, and specifically, as shown in FIG. 2, L11, L12 and L13 of the TGS-030 soft starter are respectively and correspondingly electrically connected with three-phase power supply lines, U, V and W ports of the TGS-030 soft starter are respectively and correspondingly electrically connected with three-phase input ends of the motor, two ends of a normally open contact of an alternating current contactor KM are respectively connected in parallel between L11, L12, L13 and U, V, W ports, 8 and 9 ports of the TGS-030 soft starter are respectively and electrically connected with 10 ports of an intermediate relay K1 through a third normally open contact, when the intermediate relay K1 is electrified, the TGS-030 soft starter starts to work,
further preferably, the motor protection device further comprises a motor protection breaker Q; the motor protection circuit breaker Q is connected in series in a line between the power supply line and the soft starter, and is used for protecting the line.
Further preferably, the device also comprises a current meter and a communication line; the input end of the ammeter is connected in parallel in a line between the power supply line and the soft starter, and the output end of the ammeter is electrically connected with one end of the communication line. Wherein, the communication line is an RS485 shielded wire.
The beneficial effect of this embodiment does: the local gating circuit is arranged to provide a local control mode, the remote gating circuit is arranged to provide a remote control mode, and field personnel can select the remote control mode to control the starting or the stopping of the motor, so that the damage of the field personnel caused by the impact current generated at the moment of starting the motor when the field personnel go to the field operation is avoided;
the input end of the local gating circuit and the input end of the remote gating circuit are respectively and electrically connected with the power supply line, the output end of the local gating circuit and the output end of the remote gating circuit are respectively and electrically connected with the input end of the main control circuit, the control end of the remote gating circuit is electrically connected with the output end of the P L C, and the output end of the main control circuit is electrically connected with the motor starting circuit, so that the main control circuit is not controlled by the P L C, and a local control mode is provided through the local gating circuit, even if the P L C fails, the local control of the motor starting circuit can be realized through the local gating circuit, and the motor can run or be shut down;
by arranging the soft starter, the starting current of the motor can be reduced, the power distribution capacity is reduced, and capacity increase investment is avoided; the starting stress is reduced, and the service life of the motor and related equipment is prolonged; the motor can be smoothly started/stopped without steps, and the problems of mechanical and electrical impact and the like caused by starting the motor by adopting the traditional starting modes such as direct starting, star/triangle starting, self-coupling decompression starting and the like are avoided.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The control circuit based on the soft start of the high-power motor comprises a P L C and a motor, and is characterized by also comprising a soft starter, a local gating circuit, a remote gating circuit and a main control circuit;
the input end of the local gating circuit and the input end of the remote gating circuit are electrically connected with the power supply line respectively, the output end of the local gating circuit and the output end of the remote gating circuit are electrically connected with the input end of the main control circuit respectively, the control end of the remote gating circuit is electrically connected with the output end of the P L C, the output end of the main control circuit is connected in series with a line between the power supply line and the motor, and the soft starter is connected in series with a line between the power supply line and the motor.
2. The control circuit based on the soft start of the high-power motor as claimed in claim 1, wherein: the local gating circuit comprises a knob switch S1, a stop button S2 and a start button S3;
the knob switch S1 comprises a first normally open contact S1-1 and a second normally open contact S1-2;
the first normally open contact S1-1, the stop button S2, the start button S3 and the input end of the main control circuit are electrically connected in sequence.
3. The control circuit based on the soft start of the high-power motor as claimed in claim 2, wherein: the remote gating circuit comprises a second normally open contact S1-2, an intermediate relay KRA, a first normally open contact of the intermediate relay KRA, a second normally open contact of the intermediate relay KRA, a normally open contact of a relay KR and a normally open contact of the relay KR;
the first wiring end and the live wire electric connection of second normally open contact S1-2, the second wiring end of second normally open contact S1-2 passes through intermediate relay KRA and outside 0VAC power electric connection, the first wiring end and the live wire electric connection of intermediate relay KRA ' S first normally open contact, the second wiring end of intermediate relay KRA ' S first normally open contact passes through relay KR ' S normally open contact and main control circuit ' S input electric connection, relay KR and 0VDC power electric connection are passed through to P L C ' S output, intermediate relay KRA ' S second normally open contact and P L C ' S input electric connection.
4. The control circuit based on the soft start of the high-power motor as claimed in claim 3, wherein: the main control circuit comprises an output relay KQ, a normally open contact of the output relay KQ, an intermediate relay K1, a first normally open contact of an intermediate relay K1, a second normally open contact of an intermediate relay K1, an alternating current contactor KM and a normally open contact of an alternating current contactor KM;
the first terminal of the output relay KQ is electrically connected with a live wire, the second terminal of the output relay KQ is electrically connected with a zero line, the normally open contact of the start button S3 and the relay KR is electrically connected with the first terminal of the intermediate relay K1 through the normally open contact of the output relay KQ, and the second terminal of the intermediate relay K1 is electrically connected with the zero line;
in a circuit between a first normally open contact of the intermediate relay K1 and a first terminal of the alternating current contactor KM, a second terminal of the alternating current contactor KM is electrically connected with a zero line, a second normally open contact of the intermediate relay K1 is connected in parallel at two ends of the starting button S3, and a normally open contact of the alternating current contactor KM is connected in parallel between the input end and the output end of the soft starter.
5. The control circuit based on the soft start of the high-power motor as claimed in claim 4, wherein: the soft starter is characterized in that the types of the soft starter are as follows: TGS-030 Soft Starter;
l11, L12 and L13 of the TGS-030 soft starter are respectively electrically connected with three-phase power supply lines in a one-to-one correspondence manner, and U, V and W ports of the TGS-030 soft starter are respectively electrically connected with three-phase input ends of a motor in a one-to-one correspondence manner;
two ends of a normally open contact of the alternating current contactor KM are respectively connected in parallel between ports L11, L12, L13 and U, V, W.
6. The control circuit based on the soft start of the high-power motor as claimed in claim 1, wherein: the motor protection circuit breaker Q is also included;
the motor protection circuit breaker Q is connected in series in the line between the supply line and the soft starter.
7. The control circuit based on the soft start of the high-power motor as claimed in claim 1, wherein: the device also comprises a current meter and a communication line;
the input end of the ammeter is connected in parallel in a line between the power supply line and the soft starter, and the output end of the ammeter is electrically connected with one end of the communication line.
8. The control circuit based on the soft start of the high-power motor as claimed in claim 7, wherein: the communication line is an RS485 shielded wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922476017.5U CN211046802U (en) | 2019-12-31 | 2019-12-31 | Control circuit based on high-power motor soft start |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922476017.5U CN211046802U (en) | 2019-12-31 | 2019-12-31 | Control circuit based on high-power motor soft start |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211046802U true CN211046802U (en) | 2020-07-17 |
Family
ID=71539634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922476017.5U Active CN211046802U (en) | 2019-12-31 | 2019-12-31 | Control circuit based on high-power motor soft start |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211046802U (en) |
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2019
- 2019-12-31 CN CN201922476017.5U patent/CN211046802U/en active Active
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