CN210120396U - Slider adjusting motor loop prevents contactor contact adhesion protection circuit - Google Patents
Slider adjusting motor loop prevents contactor contact adhesion protection circuit Download PDFInfo
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- CN210120396U CN210120396U CN201921436886.9U CN201921436886U CN210120396U CN 210120396 U CN210120396 U CN 210120396U CN 201921436886 U CN201921436886 U CN 201921436886U CN 210120396 U CN210120396 U CN 210120396U
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- contactor
- auxiliary contact
- protection circuit
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- contact
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Abstract
The slider adjusts the motor circuit and prevents contactor contact adhesion protection circuit. Relate to press technical field, especially relate to a slider adjustment motor protection control circuit. The slider adjusting motor loop contactor contact adhesion prevention protection circuit control circuit can avoid equipment from operating mistakenly after contactor contacts are burnt and corroded. The motor protection circuit comprises a main circuit and a control circuit, wherein the main circuit comprises a motor protection circuit breaker 1QM1, a forward rotation contactor 2KM1 and a reverse rotation contactor 3KM 1; the motor protection circuit breaker 1QM1 is provided with a motor protection circuit breaker normally open auxiliary contact 1QM 11; the forward contactor 2KM1 is provided with a forward contactor normally open auxiliary contact 2KM11 and a normally closed auxiliary contact 2KM 12; the reverse contactor has a reverse contactor normally open auxiliary contact 3KM11 and a reverse contactor normally closed auxiliary contact 3KM 12. The utility model discloses have and cut off the main power supply, make motor bring to rest, prevent that the accident from expanding, play the guard action.
Description
Technical Field
The utility model relates to a press technical field especially relates to a slider adjusting motor protection control circuit.
Background
The method is generally used for controlling a motor by simultaneously controlling the motor to rotate forwards and backwards through two contactors, and the direct starting mode is adopted, so that the forward and reverse rotation switching is relatively frequent. Because the starting current of the motor is 4-7 times of the rated current, the current which directly jumps from positive rotation to reverse rotation can exceed 10 times or more of the rated current, when the sliding block is frequently inching and adjusted, the positive rotation and the reverse rotation are frequently switched, the contact of the contactor is easily burnt and corroded by overhigh current during starting, the main contact is impacted by the starting current for many times, the main contact of the contactor is adhered after a long time, and the motor is damaged or even safety accidents are caused.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes above-mentioned prior art's defect provides one kind can take place to burn at the contactor contact and lose the back, can avoid the slider accommodate motor return circuit of equipment maloperation to prevent contactor contact adhesion protection circuit control circuit.
The technical scheme of the utility model is that: the motor protection circuit comprises a main circuit and a control circuit, wherein the main circuit comprises a motor protection circuit breaker 1QM1, a forward rotation contactor 2KM1 and a reverse rotation contactor 3KM 1;
the motor protection circuit breaker 1QM1 is provided with a motor protection circuit breaker normally open auxiliary contact 1QM 11;
the forward contactor 2KM1 is provided with a forward contactor normally open auxiliary contact 2KM11 and a normally closed auxiliary contact 2KM 12;
the reverse contactor is provided with a reverse contactor normally-open auxiliary contact 3KM11 and a reverse contactor normally-closed auxiliary contact 3KM 12;
the main circuit further comprises an anti-adhesion cut-off contactor 1KM1, wherein the anti-adhesion cut-off contactor 1KM1 is provided with an anti-adhesion cut-off contactor normally open auxiliary contact 1KM 11; the anti-adhesion cut-off contactor 1KM1 is connected in series between the motor protection circuit breaker 1QM1 and the positive and reverse contactors 2KM1 and 3KM 1;
the control circuit comprises a PLC input module X1, a PLC output module X2 and a control power supply, wherein one end of a normally open auxiliary contact 1QM11 of the motor protection circuit breaker, a normally open auxiliary contact 2KM11 of the forward rotation contactor, a normally open auxiliary contact 3KM11 of the reverse rotation contactor and a normally open auxiliary contact 1KM11 of the anti-adhesion cutting contactor are connected with the power supply, and the other end of the normally open auxiliary contact is connected with the PLC input module X1;
and one end of a coil of the anti-adhesion cutting contactor 1KM1 is connected with the PLC output module X2, and the other end of the coil is connected with the power supply.
The electric interlocking loop comprises a normally closed contact 2KM12 of the forward rotating contactor and a coil of a reverse rotating contactor 3KM1 which are connected in series, one end of the normally closed contact 2KM12 of the forward rotating contactor is connected with the PLC output module X2, and one end of the coil of the reverse rotating contactor 3KM1 is connected with the power supply.
The electric interlocking loop further comprises a normally closed contact 3KM12 of a reverse rotation contactor and a coil of the forward rotation contactor 2KM1 which are connected in series, one end of the normally closed contact 3KM12 of the reverse rotation contactor is connected with the PLC output module X2, and one end of the coil of the forward rotation contactor 3KM1 is connected with the power supply.
When the electric current was too big among the equipment operation process, the electric arc melting welding that produces when the main contact of one of them contactor of just reversing was cut off the power supply and by the adhesion, main contact still is the switch-on after its coil outage, at this moment if the circuit of another contactor circular telegram, will cause three phase current short circuit accident, the utility model discloses an at PLC outside setting by just, the interlocking circuit that reversal contactor's normally closed auxiliary contact constitutes, if the main contact of corotation contactor is adhered, at this moment it is in the off-state with the normally closed auxiliary contact of reversal contactor coil series connection, therefore reversal contactor's coil can not be electrified, can not cause three phase current short circuit accident yet. In addition, when the main contact of the positive and negative rotating contactor can not break the fault due to adhesion, the normally open auxiliary contact of the contactor is closed, the PLC obtains a feedback signal at the moment, sends an instruction to enable the coil of the anti-adhesion cut-off contactor to lose power, cuts off a main power supply, stops the motor from running, prevents the accident from expanding, and plays a role in protection.
Drawings
FIG. 1 is a main circuit diagram of the present invention,
figure 2 is a first control circuit diagram of the present invention,
figure 3 is a control circuit diagram of the present invention,
in the figure, 1QM1 is a motor protection circuit breaker, 1QM11 is a normally open auxiliary contact of the motor protection circuit breaker,
1KM1 is an anti-adhesion cutting contactor, 1KM11 is a normally open auxiliary contact of the anti-adhesion cutting contactor,
2KM1 is a forward rotation contactor, 2KM11 is a normally open auxiliary contact of the forward rotation contactor, 2KM12 is a normally closed auxiliary contact of the forward rotation contactor,
3KM1 is a reverse contactor, 3KM11 is a normally open auxiliary contact of the reverse contactor, 3KM12 is a normally closed auxiliary contact of the reverse contactor,
x1 is a PLC input module, and X2 is a PLC output module.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the present application will be clearly and completely described below with reference to fig. 1 to 3.
Fig. 1 is a diagram of a main circuit for preventing the contact adhesion of a slider adjusting motor loop contactor, and fig. 2 and 3 are external wiring diagrams of a PLC control system with the same function as the slider adjusting motor loop contactor.
The utility model discloses a main circuit and control circuit, the main circuit includes motor protection circuit breaker 1QM1, corotation contactor 2KM1 and reversal contactor 3KM 1.
The motor protection breaker 1QM1 has a motor protection breaker normally open auxiliary contact 1QM11, and the role of the motor protection breaker is to isolate, prevent short circuit and overload, and to fine-tune to the actual motor load.
The normal contactor 2KM1 has a normal contactor normally open auxiliary contact 2KM11 and a normally closed auxiliary contact 2KM12, and the reverse contactor has a reverse contactor normally open auxiliary contact 3KM11 and a reverse contactor normally closed auxiliary contact 3KM 12.
The main circuit further comprises an anti-adhesion cut-off contactor 1KM1, wherein the anti-adhesion cut-off contactor 1KM1 is provided with an anti-adhesion cut-off contactor normally open auxiliary contact 1KM11, and the anti-adhesion cut-off contactor 1KM1 is connected in series between the motor protection circuit breaker 1QM1 and the positive and reverse contactors 2KM1 and 3KM 1.
The control circuit comprises a PLC input module X1, a PLC output module X2 and a control power supply, wherein in the control circuit, one end of a normally open auxiliary contact 1QM11 of the motor protection circuit breaker, a normally open auxiliary contact 2KM11 of the forward rotation contactor, a normally open auxiliary contact 3KM11 of the reverse rotation contactor and a normally open auxiliary contact 1KM11 of the anti-adhesion cut-off contactor are connected with the power supply, and the other end of the normally open auxiliary contact is connected with the PLC input module X1, so that the PLC can detect the state of the forward rotation contactor and the state of the motor protection circuit breaker and finally display the running state in a touch screen of the.
An electric interlocking circuit consisting of the normally closed auxiliary contact 2KM12 of the forward contactor, the normally closed auxiliary contact 3KM12 of the reverse contactor and the coils of the forward contactor 2KM1 and the reverse contactor 3KM1 is connected in a control circuit arranged outside the PLC, one end of the coil of the anti-adhesion cutting contactor 1KM1 is connected with a PLC output module X2, and the other end of the coil is connected with a power supply.
The working principle is as follows: when the PLC detects that the main contacts of the forward contactor 2KM1 and the reverse contactor 3KM1 are adhered, an instruction is sent out, so that the coil of the anti-adhesion cut-off contactor loses power, the main contact of the anti-adhesion cut-off contactor 1KM1 is disconnected, the power supply of a main loop is cut off, the motor stops rotating, the accident is prevented from being expanded, and the protection effect is achieved.
In fig. 3, the electric interlock loop comprises a normally closed contact 2KM12 of the forward contactor and a coil of a reverse contactor 3KM1 which are connected in series, wherein one end of the normally closed contact 2KM12 of the forward contactor is connected with a PLC output module X2, and one end of the coil of the reverse contactor 3KM1 is connected with a power supply.
The electric interlocking loop further comprises a normally closed contact 3KM12 of a reverse rotation contactor and a coil of the forward rotation contactor 2KM1 which are connected in series, one end of the normally closed contact 3KM12 of the reverse rotation contactor is connected with the PLC output module X2, and one end of the coil of the forward rotation contactor 3KM1 is connected with the power supply.
The working principle of the electric interlock is as follows: the coil of the forward rotation contactor 2KM1 is electrified to enable the motor to rotate forward, and the normally closed auxiliary contact 2KM12 of the forward rotation contactor connected with the coil of the reverse rotation contactor 3KM in series is changed from a closed point to an open point, so that the coil of the reverse rotation contactor 3KM is electrified, a reverse rotation loop is disconnected, and the motor is guaranteed not to rotate reversely when rotating forward. Otherwise, the same principle is applied.
The utility model has the characteristics that the motor does not adopt drive arrangement, only relies on the mode that traditional contactor directly started to remove under the condition of frequent inching motor. Once the main contact of the contactor for controlling the forward and reverse rotation is sticky, the system effectively protects the motor and avoids possible accidents without increasing too much cost, and the personal safety and the equipment safety are ensured.
Claims (3)
1. The slider-regulated motor circuit contactor adhesion prevention protection circuit comprises a main circuit and a control circuit, wherein the main circuit comprises a motor protection circuit breaker (1QM1), a forward contactor (2 KM1) and a reverse contactor (3 KM 1);
the motor protection circuit breaker (1QM1) is provided with a motor protection circuit breaker normally open auxiliary contact (1QM 11);
the forward rotation contactor (2 KM1) is provided with a forward rotation contactor normally open auxiliary contact (2 KM 11) and a normally closed auxiliary contact (2 KM 12);
the reverse contactor is provided with a reverse contactor normally-open auxiliary contact (3 KM 11) and a reverse contactor normally-closed auxiliary contact (3 KM 12);
the anti-adhesion cut-off contactor is characterized by further comprising an anti-adhesion cut-off contactor (1KM1), wherein the anti-adhesion cut-off contactor (1KM1) is provided with an anti-adhesion cut-off contactor normally-open auxiliary contact (1KM 11); the anti-adhesion cut-off contactor (1KM1) is connected in series between the motor protection circuit breaker (1QM1) and the positive and negative rotation contactors (2 KM1 and 3KM 1);
the control circuit comprises a PLC input module (X1), a PLC output module (X2) and a control power supply, wherein one end of a normally open auxiliary contact (1QM 11) of the motor protection circuit breaker, a normally open auxiliary contact (2 KM 11) of the forward rotation contactor, a normally open auxiliary contact (3 KM 11) of the reverse rotation contactor and a normally open auxiliary contact (1KM 11) of the anti-adhesion cutting contactor is connected with the control power supply, and the other end of the normally open auxiliary contact is connected with the PLC input module (X1);
one end of a coil of the anti-adhesion cut-off contactor (1KM1) is connected with the PLC output module (X2), and the other end of the coil is connected with the control power supply.
2. The slider-regulated motor circuit anti-contactor contact adhesion protection circuit of claim 1, wherein the normal contactor normally closed contact (2 KM 12) and the coil of the reverse contactor (3 KM1) are connected in series to form an electrical interlock circuit, one end of the normal contactor normally closed contact (2 KM 12) is connected to the PLC output module (X2), and one end of the coil of the reverse contactor (3 KM1) is connected to the control power supply.
3. The slider-regulated motor circuit anti-contactor contact adhesion protection circuit of claim 1, wherein the reverse contactor normally closed contact (3 KM 12) and the coil of the forward contactor (2 KM1) are connected in series to form an electrical interlock circuit, one end of the reverse contactor normally closed contact (3 KM 12) is connected to the PLC output module (X2), and one end of the coil of the forward contactor (2 KM1) is connected to the control power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921436886.9U CN210120396U (en) | 2019-08-30 | 2019-08-30 | Slider adjusting motor loop prevents contactor contact adhesion protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921436886.9U CN210120396U (en) | 2019-08-30 | 2019-08-30 | Slider adjusting motor loop prevents contactor contact adhesion protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210120396U true CN210120396U (en) | 2020-02-28 |
Family
ID=69617176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921436886.9U Active CN210120396U (en) | 2019-08-30 | 2019-08-30 | Slider adjusting motor loop prevents contactor contact adhesion protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210120396U (en) |
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2019
- 2019-08-30 CN CN201921436886.9U patent/CN210120396U/en active Active
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