CN220754347U - Electromagnetic power-off switch with overcurrent protection function - Google Patents
Electromagnetic power-off switch with overcurrent protection function Download PDFInfo
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- CN220754347U CN220754347U CN202322052212.1U CN202322052212U CN220754347U CN 220754347 U CN220754347 U CN 220754347U CN 202322052212 U CN202322052212 U CN 202322052212U CN 220754347 U CN220754347 U CN 220754347U
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- electric winch
- control module
- contactor
- switch
- power supply
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- 238000001514 detection method Methods 0.000 claims abstract description 14
- 230000007547 defect Effects 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Aiming at the defects that an electric winch can only be manually powered off and is easy to forget in the prior art, the utility model provides an electromagnetic power-off switch with an overcurrent protection function, which comprises a control unit and a detection device for detecting a winch power supply, wherein the control unit comprises a contactor for controlling the on-off between the electric winch and the power supply, a control module and an output relay; the detection device detects the output current value when the electric winch operates. The contactor controls the power connection between the power supply of the electric winch and the electric winch, the control module controls the relay to further control the on-off of the contactor, a countdown program arranged in the control module can enter a countdown time after the electric winch stops working, the contactor normally works in the countdown time, the control module controls the contactor to be disconnected when the countdown time begins and the electric winch does not run until the electric winch is finished, and the electric winch is powered off, so that the situation that a user forgets to power off and power supply is caused is avoided.
Description
Technical Field
The utility model belongs to the technical field of electric winches, and particularly relates to an electromagnetic power-off switch with an overcurrent protection function.
Background
The electric winch is widely applied to special automobiles or special vehicles such as off-road vehicles, is driven by the power system of the vehicle, is convenient to use, and can be normally used when the vehicle is flameout, but the electric winch is electrified for a long time when the winch is not used, so that hidden danger exists. If water is carelessly fed after wading, the long-term electrification can lead to line damage, and the winch can be started by mistake under the condition of electromagnetic interference, and in addition, the battery is easy to be deficient due to long-time uninterrupted power on a new energy automobile. The existing electric winch part on the market can be provided with a manual isolating switch, and after the electric winch stops working, the electric winch needs to be powered off by manual operation, so that the electric winch is easy to forget and inconvenient to use.
Disclosure of Invention
Aiming at the defects that an electric winch can only be powered off manually and is easy to forget in the prior art, the utility model provides an electromagnetic power-off switch with an overcurrent protection function.
The utility model aims at realizing the following technical scheme: an electromagnetic power-off switch with an overcurrent protection function comprises a control unit and a detection device for detecting a winch power supply, wherein the control unit comprises a contactor for controlling on-off between an electric winch and the power supply, a control module and an output relay; the control module is electrically connected with the output relay, the output relay is electrically connected with the contactor, and the detection device is electrically connected with the control module; the detection device detects the output current value when the electric winch operates.
In the scheme, the contactor controls the power supply of the electric winch and the power supply connection between the electric winch, the control module controls the relay to further control the on-off of the contactor, a countdown program arranged in the control module can enter a countdown time after the electric winch stops working, the contactor works normally in the countdown time, the countdown time starts until the electric winch is not operated, and the control module controls the contactor to be disconnected, so that the electric winch is powered off, and the situation that a user forgets to power off to cause power supply shortage is avoided.
Preferably, the control module is a PLC or a single chip microcomputer.
Preferably, the detection device is a hall current sensor, and the accuracy of detecting the direct current is high.
Preferably, a switch is arranged on the control module, and the physical switch realizes the operation closing of the control module.
Preferably, the output relays are two, wherein the normally open contact of one output relay and the normally closed contact of the other output relay are connected in series in a coil loop of the contactor.
Preferably, the coil control loops of both output relays are connected to the control module.
Compared with the prior art, the utility model has the following beneficial effects: the contactor controls the power connection between the power supply of the electric winch and the electric winch, the control module controls the relay to further control the on-off of the contactor, a countdown program arranged in the control module can enter a countdown time after the electric winch stops working, the contactor normally works in the countdown time, the control module controls the contactor to be disconnected when the countdown time begins and the electric winch does not run until the electric winch is finished, and the electric winch is powered off, so that the situation that a user forgets to power off and power supply is caused is avoided.
Drawings
FIG. 1 is an electrical schematic of the present utility model;
FIG. 2 is a circuit block diagram of the present utility model;
fig. 3 is a circuit configuration diagram of the contactor and the output relay in embodiment 1;
fig. 4 is a circuit configuration diagram of the contactor and the output relay in embodiment 2.
The marks in the figure: 1. a voltage stabilizing circuit; 2. a control module; 3. an output relay; 4. a switch; 5. an insert.
Detailed Description
The utility model is further described below with reference to embodiments shown in the drawings in which:
example 1
As shown in fig. 1, 2 and 3, an electromagnetic power-off switch with an overcurrent protection function comprises a control unit and a detection device for detecting a winch power supply, wherein the detection device is a hall current sensor, and the hall sensor is connected with the control unit through an insert 5. The control unit comprises a control module 2, the control module 2 can be a PLC or a singlechip, the singlechip is used in the embodiment, the model of the singlechip is STC8G1K08A, and the voltage stabilizing circuit 1 for supplying power to the singlechip is specially arranged for stabilizing the power supply of the singlechip, wherein the model of the voltage stabilizing module in the voltage stabilizing circuit 1 is XL1509.
The singlechip is connected with a switch 4 for controlling the singlechip to be opened and closed.
The singlechip is connected with the output relay 3, and the sucking of the coil of the output relay 3 is controlled by the singlechip, as shown in fig. 2, the normally open contact of the output relay RL2 and the coil of the contactor are in a control loop, and the on-off of the contactor is controlled.
Operation principle:
when the electric winch is needed to be used, the switch 4 is turned on, so that the control module 2 is electrified, the control module 2 can output a signal to enable the output relay 3 to be attracted, and therefore the contactor is attracted, and the electric winch can be in a state capable of running at any time. Then can control the operation of electric capstan through electric capstan control button, the output current size of the capstan power of electric capstan power that the hall current sensor real-time detection was supplied with the electric capstan power in the electric capstan operation in-process to transmit this numerical value to control module 2 in real time. When the control module 2 detects that the output current value of the winch power supply is too large, the control module 2 outputs a control signal to enable the output relay 3 to be disconnected, so that the contactor is disconnected, the power supply of the electric winch is cut off, and the electric winch is prevented from being damaged by continuous heavy current.
When the electric winch stops working, the current detected by the Hall current sensor is zero, the countdown program in the control module 2 starts to trigger operation, the contactor is still in a suction state, the electric winch is still powered normally, so that the electric winch is enabled repeatedly in a short time, if the electric winch is not started in a set time, the electric winch is considered to be used, after the timing is finished, the control module 2 sends out a signal, and the output relay 3 controls the contactor to be disconnected, so that the electric winch is powered off.
Example 2
As shown in fig. 1, 2 and 4, an electromagnetic power-off switch with an overcurrent protection function comprises a control unit and a detection device for detecting a winch power supply, wherein the detection device is a hall current sensor, and the hall sensor is connected with the control unit through an insert 5. The control unit comprises a control module 2, the control module 2 can be a PLC or a singlechip, the singlechip is used in the embodiment, the model of the singlechip is STC8G1K08A, and the voltage stabilizing circuit 1 for supplying power to the singlechip is specially arranged for stabilizing the power supply of the singlechip, wherein the model of the voltage stabilizing module in the voltage stabilizing circuit 1 is XL1509.
The singlechip is connected with a switch 4 for controlling the singlechip to be opened and closed.
In this embodiment, as shown in fig. 2, two output relays 3 are connected, and the single-chip microcomputer controls the actuation of the coils of the two output relays 3, and the normally open contact of the output relay RL2, the normally closed contact of the output relay RL1 and the coil of the contactor are in a control loop to control the on-off of the contactor.
Operation principle:
when the electric winch is needed to be used, the switch 4 is turned on, so that the control module 2 is electrified, the control module 2 can output a signal to enable the output relay RL2 to be attracted, and therefore the contactor is attracted, and the electric winch can be in a state capable of running at any time. Then can control the operation of electric capstan through electric capstan control button, the output current size of the capstan power of electric capstan power that the hall current sensor real-time detection was supplied with the electric capstan power in the electric capstan operation in-process to transmit this numerical value to control module 2 in real time. When the control module 2 detects that the output current value of the winch power supply is too large, the control module 2 outputs a control signal to enable the output relays RL2 and RL1 to be simultaneously disconnected, so that the contactor is disconnected, the power supply of the electric winch is cut off, and the electric winch is prevented from being damaged by continuous large current. The output relay RL1 and the output relay RL2 are simultaneously disconnected, so that the output relay RL1 can also disconnect a coil connection loop of the contactor under the condition that the output relay RL2 cannot be disconnected if the output relay RL2 fails, and the electric winch can stop running.
When the electric winch stops working, the current detected by the Hall current sensor is zero, the countdown program in the control module 2 starts to trigger operation, the contactor is still in a suction state, the electric winch is still powered normally, so that the electric winch is enabled repeatedly in a short time, if the electric winch is not started in a set time, the electric winch is considered to be used completely, after timing is finished, the control module 2 sends out a signal, the output relay RL1 does not act, the output relay RL2 is disconnected, and the contactor is controlled to be disconnected, so that the electric winch is powered off.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.
Claims (6)
1. The electromagnetic power-off switch with the overcurrent protection function is characterized by comprising a control unit and a detection device for detecting a winch power supply, wherein the control unit comprises a contactor for controlling on-off between an electric winch and the power supply, a control module and an output relay; the control module is electrically connected with the output relay, the output relay is electrically connected with the contactor, and the detection device is electrically connected with the control module; the detection device detects the output current value when the electric winch operates.
2. The electromagnetic power-off switch with overcurrent protection function according to claim 1, wherein the control module is a PLC or a singlechip.
3. An electromagnetic cut-off switch with overcurrent protection according to claim 1, wherein the detection means is a hall current sensor.
4. An electromagnetic power-off switch with overcurrent protection function according to claim 1, wherein the control module is provided with a switch.
5. An electromagnetic cut-off switch with overcurrent protection according to claim 1, wherein the number of the output relays is two, and the normally open contact of one output relay and the normally closed contact of the other output relay are connected in series in the coil loop of the contactor.
6. An electromagnetic cut-off switch with overcurrent protection according to claim 5, wherein the coil control loops of both output relays are connected to the control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322052212.1U CN220754347U (en) | 2023-07-31 | 2023-07-31 | Electromagnetic power-off switch with overcurrent protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322052212.1U CN220754347U (en) | 2023-07-31 | 2023-07-31 | Electromagnetic power-off switch with overcurrent protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220754347U true CN220754347U (en) | 2024-04-09 |
Family
ID=90560358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322052212.1U Active CN220754347U (en) | 2023-07-31 | 2023-07-31 | Electromagnetic power-off switch with overcurrent protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220754347U (en) |
-
2023
- 2023-07-31 CN CN202322052212.1U patent/CN220754347U/en active Active
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