CN215681767U - Protective circuit - Google Patents
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- CN215681767U CN215681767U CN202121871766.9U CN202121871766U CN215681767U CN 215681767 U CN215681767 U CN 215681767U CN 202121871766 U CN202121871766 U CN 202121871766U CN 215681767 U CN215681767 U CN 215681767U
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Abstract
The embodiment of the utility model provides a protection circuit, which comprises a starting module, a power-on circuit, a starting circuit, a control module and a motor, wherein the starting module is used for starting the power-on circuit; the starting module is electrically connected with the control module and used for providing an electric signal for the control module; the control module is electrically connected with the power-on circuit and used for outputting a first high level signal or outputting a first low level signal to the power-on circuit; a power-up circuit for powering up the electric work machine or powering down the electric work machine; the control module is electrically connected with the starting circuit and is also used for outputting a second high level signal or outputting a second low level signal to the starting circuit; the starting circuit is electrically connected with the motor and used for starting the motor or closing the motor. The utility model is used for solving the defect that the failure rate of the power system of the excavator is higher due to poor use habits of users in the prior art.
Description
Technical Field
The utility model relates to the technical field of circuits, in particular to a protection circuit.
Background
The hydraulic excavator is an engineering machine widely applied to the construction fields of urban infrastructure and the like, and has become a popular engineering machine with the increase of national infrastructure year by year and the increase of energy requirements of mineral products and the like. The power system of the electric hydraulic excavator is a power source of the whole excavator, and whether the power system can normally operate or not directly influences the operation of the whole excavator.
However, since the failure rate of the power system of the excavator is high due to bad use habits of users, how to adapt the power system of the excavator to various use habits of users is a problem to be solved in the industry at present.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a protection circuit, which is used for solving the defect that the fault rate of a power system of an excavator is high due to poor use habits of users in the prior art and realizing the adaptation to various use habits of the users.
The embodiment of the utility model provides a protection circuit, which is applied to an electric operation machine, and comprises: the starting circuit comprises a starting module, a power-on circuit, a starting circuit, a control module and a motor;
the starting module is electrically connected with the control module and used for providing an electric signal for the control module, and the electric signal comprises: a first signal and a second signal;
the control module is electrically connected with the power-on circuit and used for outputting a first low level signal to the power-on circuit or receiving the first signal and outputting a first high level signal to the power-on circuit;
the power-on circuit is used for receiving the first high level signal to power on the electric operation machine or receiving the first low level signal to power off the electric operation machine;
the control module is electrically connected with the starting circuit and is also used for outputting a second low level signal to the starting circuit or receiving the second signal and outputting a second high level signal to the starting circuit;
the starting circuit is electrically connected with the motor and used for receiving the second high level signal to start the motor or receiving the second low level signal to stop the motor.
According to a protection circuit of an embodiment of the present invention, the power-on circuit includes: a first relay set and a first fuse;
the first end of first relay group with control module electric connection, the second end of first relay group with first fuse electric connection.
According to the protection circuit of an embodiment of the present invention, the protection circuit further includes: the power supply module is electrically connected with the starting module and used for supplying power to the starting module;
the first relay group includes: a first relay and a second relay;
the first end of the coil of the first relay is electrically connected with the control module, the second end of the coil of the first relay is electrically connected with the negative electrode of the power module, the first end of the contact of the first relay is electrically connected with the first end of the coil of the second relay, and the second end of the contact of the first relay is electrically connected with the positive electrode of the power module;
the second end of the coil of the second relay with control module electric connection, the first end of the contact of the second relay with power module's positive pole electric connection, the second end of the contact of the second relay with first fuse electric connection.
According to a protection circuit of an embodiment of the present invention, the start-up circuit includes: a second relay group and a third relay group;
the first end of second relay group with start module electric connection, the second end of second relay group with motor electric connection, the first end of third relay group with control module electric connection, the second end of third relay group with motor electric connection.
According to the protection circuit of an embodiment of the present invention, the start-up circuit further includes: a second fuse, a third fuse, and a fourth fuse;
the second relay group includes: a third relay, the third relay set comprising: a fourth relay and a fifth relay;
a first end of a coil of the third relay is electrically connected with the starting module, a second end of the coil of the third relay is electrically connected with the ground wire, a first end of a contact of the third relay is electrically connected with the second fuse, and a second end of the contact of the third relay is electrically connected with the control module;
a first end of a coil of the fourth relay is electrically connected with the motor through the third fuse, a second end of the coil of the fourth relay is electrically connected with the control module, a first end of a contact of the fourth relay is electrically connected with the motor, and a second end of the contact of the fourth relay is electrically connected with the ground wire;
the first end of the coil of the fifth relay and the fourth fuse are electrically connected, the second end of the coil of the fifth relay and the control module are electrically connected, the first end of the contact of the fifth relay and the motor are electrically connected, and the second end of the contact of the fifth relay and the ground wire are electrically connected.
According to a protection circuit of an embodiment of the present invention, the start module includes: the first starting end and the second starting end are respectively and electrically connected with the control module;
the first starting end is used for providing the first signal for the control module;
the second starting end is used for providing the second signal for the control module.
According to a protection circuit of an embodiment of the present invention, the control module includes: the system comprises a first control unit, a second control unit and a third control unit, wherein the first control unit, the second control unit and the third control unit are electrically connected in a communication way;
the first control unit is electrically connected with the first starting end and used for receiving the first signal output by the first starting end;
the first control unit is further configured to control the second control unit to output the first low-level signal;
the second control unit is electrically connected with a second end of the coil of the second relay and used for outputting the first low-level signal to power off the power-on circuit;
the first control unit is further configured to receive the first signal and control the third control unit to output the first high level signal;
the third control unit is electrically connected with the first end of the coil of the first relay and used for outputting the first high-level signal to electrify the electrifying circuit.
According to the protection circuit of an embodiment of the present invention, the control module further includes: the control system comprises a fourth control unit, a fifth control unit and a sixth control unit, wherein the fourth control unit, the fifth control unit and the sixth control unit are electrically connected in a communication manner;
the fourth control unit is electrically connected with the second end of the contact of the third relay, and the first end of the coil of the third relay is electrically connected with the second starting end and is used for receiving a second signal output by the second starting end;
the fourth control unit is further configured to receive the second signal and control the fifth control unit to output the second high-level signal;
the fifth control unit is electrically connected with a second end of the coil of the fourth relay, and is used for outputting the second high-level signal and electrifying the fourth relay;
the fourth control unit is further configured to receive the second signal and control the sixth control unit to output the second high-level signal;
the sixth control unit is electrically connected with a second end of the coil of the fifth relay, and is used for outputting the second high-level signal and electrifying the fifth relay;
the first end of the contact of the fourth relay and the first end of the contact of the fifth relay are respectively electrically connected with the motor and used for starting the motor;
the fourth control unit is further configured to control the fifth control unit and the sixth control unit to output the second low-level signal;
and the first end of the contact of the fourth relay and the first end of the contact of the fifth relay are respectively electrically connected with the motor and used for closing the motor.
According to an embodiment of the utility model, the protection circuit further comprises a motor controller;
the first end of the motor controller is electrically connected with the first end of the contact of the fourth relay and the first end of the contact of the fifth relay respectively, and the second end of the motor controller is electrically connected with the motor and used for controlling the starting or closing of the motor.
According to the protection circuit of an embodiment of the present invention, the protection circuit further includes: a pilot switch and a door catch switch;
the first end of the pilot switch is electrically connected with the second starting end, the second end of the pilot switch is electrically connected with the first end of the door catch switch, and the second end of the door catch switch is electrically connected with the first end of the coil of the third relay.
The protection circuit provided by the embodiment of the utility model is applied to an electric operation machine, and comprises: the starting module comprises a power-on circuit, a starting circuit, a control module and a motor; the start module is connected with control module electric connection for control module provides the signal of telecommunication, the signal of telecommunication includes: a first signal and a second signal; the control module is electrically connected with the power-on circuit and used for receiving the first signal and outputting a first high-level signal to the power-on circuit, and the power-on circuit receives the first high-level signal to power on the electric operation machine; the control module is also used for outputting a first low level signal to the power-on circuit, and the power-on circuit receives the first low level signal to power off the electric operation machine; the control module is electrically connected with the starting circuit and is also used for receiving a second signal and outputting a second high-level signal to the starting circuit; the starting circuit is electrically connected with the motor and used for receiving the second high level signal to start the motor; the control module is also used for outputting a second low level signal to the starting circuit, and the starting circuit is used for receiving the second low level signal and closing the motor.
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 introduced below, and it is obvious that the drawings in the following description are 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 schematic structural diagram of a protection circuit according to an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of a protection circuit according to an embodiment of the present invention;
fig. 3 is a third schematic diagram of a protection circuit according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of a circuit protection method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The protection circuit of the embodiment of the present invention is described below with reference to fig. 1 to 3.
An embodiment of the present invention provides a protection circuit, which is applied to an electric working machine, such as a hydraulic excavator, an electric hydraulic excavator, and the like, and a circuit structure of the protection circuit is shown in fig. 1, and specifically includes: a starting module 101, a power-on circuit 102, a starting circuit 103, a control module 104, and a motor 105.
The starting module 101 is electrically connected to the control module 104, and is configured to provide an electrical signal to the control module 104, where the electrical signal includes: a first signal and a second signal;
the control module 104 is electrically connected to the power-on circuit 102, and is configured to output a first low level signal to the power-on circuit 102, or receive the first signal and output a first high level signal to the power-on circuit 102;
a power-up circuit 102 for receiving a first high level signal to power up the electric work machine, or for receiving a first low level signal to power down the electric work machine;
the control module 104 is electrically connected to the start circuit 103, and is further configured to output a second low level signal to the start circuit 103, or is further configured to receive a second signal and output a second high level signal to the start circuit 103;
the starting circuit 103 is electrically connected to the motor 105 and configured to receive a second high level signal to start the motor 105, or receive a second low level signal to turn off the motor 105.
In one embodiment, the starting module 101 includes: first start-up end and second start-up end, first start-up end and second start-up end respectively with control module 104 electric connection, first start-up end for control module 104 provides first signal, the second start-up end for control module 104 provides the second signal.
The first start-up end is a BR output end, see fig. 2 specifically, and the second start-up end is a C end, see fig. 2 specifically.
Wherein, the start module still includes: and the positive terminal is electrically connected with the positive electrode of the power module through the fifth fuse.
In the following, a detailed description of the protection circuit is given by means of a number of embodiments and with reference to fig. 2:
in one embodiment, the power-up circuit 102 includes: a first relay set and a first fuse 201. The first end of the first relay set is electrically connected to the control module 104, and the second end of the first relay set is electrically connected to the first fuse 201.
In one embodiment, the protection circuit further comprises: the power module is electrically connected with the starting module 101 and used for supplying power to the starting module 101. The first relay group includes: a first relay 202 and a second relay 203; a first end of a coil of the first relay 202 is electrically connected with the control module 104, a second end of the coil of the first relay 202 is electrically connected with a negative electrode of the power module, a first end of a contact of the first relay 202 is electrically connected with a first end of a coil of the second relay 203, and a second end of the contact of the first relay 202 is electrically connected with a positive electrode of the power module; the second end of the coil of the second relay 203 is electrically connected to the control module 104, the first end of the contact of the second relay 203 is electrically connected to the positive electrode of the power module, and the second end of the contact of the second relay 203 is electrically connected to the first fuse 201.
Specifically, the positive pole of the power module is electrically connected with the positive pole binding post of the starting module.
In one embodiment, the control module 104 includes: the control system comprises a first control unit 204, a second control unit 205 and a third control unit 206, wherein the first control unit 204, the second control unit 205 and the third control unit 206 are electrically connected in a communication mode. The first control unit 204 is electrically connected to the first start-up terminal, and is configured to receive a first signal transmitted by the first start-up terminal; the first control unit 204 is further configured to control the second control unit 205 to output a first low-level signal; the second control unit 205 is electrically connected to a second end of the coil of the second relay 203, and is configured to output a first low level signal, so as to power off the power-on circuit 102. Specifically, the second control unit 205 outputs a first low level signal, the coil of the second relay 203 is powered off, the contact of the second relay 203 is disconnected, the power-on circuit 102 is powered off at this time, and the power-off of the whole vehicle is successful.
The first control unit 204 is further configured to receive the first signal and control the third control unit 206 to output a first high-level signal; the third control unit 206 is electrically connected to the first end of the coil of the first relay 202, and is configured to output the first high-level signal, so as to power up the power-up circuit 102. Specifically, the third control unit 206 outputs a first high level signal, the coil of the first relay 202 is powered on, the contacts of the first relay 202 are electrically connected, the coil of the second relay 203 is powered on, the contacts of the second relay 203 are electrically connected, and the power-on circuit 102 is powered on, at this time, the voltage of the entire vehicle is 24V low.
In one embodiment, the start-up circuit 103 includes: a second relay set and a third relay set. The first end of the second relay set is electrically connected to the starting module 101, the second end of the second relay set is electrically connected to the motor 105, the first end of the third relay set is electrically connected to the control module 104, and the second end of the third relay set is electrically connected to the motor 105.
In one embodiment, the start-up circuit 103 further comprises: a second fuse 207, a third fuse 208, and a fourth fuse 209, and a second relay group including: a third relay 210, the third relay group including: a fourth relay 211 and a fifth relay 212.
A first end of a coil of the third relay 210 is electrically connected to the starting module 101, a second end of the coil of the third relay 210 is electrically connected to the ground, a first end of a contact of the third relay 210 is electrically connected to the second fuse 207, and a second end of the contact of the third relay 210 is electrically connected to the control module 104. A first end of a coil of the fourth relay 211 is electrically connected to the motor 105 through the third fuse 208, a second end of the coil of the fourth relay 211 is electrically connected to the control module 104, a first end of a contact of the fourth relay 211 is electrically connected to the motor 105, and a second end of the contact of the fourth relay 211 is electrically connected to a ground line.
A first end of a coil of the fifth relay 212 is electrically connected to the fourth fuse 209, a second end of the coil of the fifth relay 212 is electrically connected to the control module 104, a first end of a contact of the fifth relay 212 is electrically connected to the motor 105, and a second end of the contact of the fifth relay 212 is electrically connected to the ground.
In one embodiment, the control module further comprises: the fourth control unit 213, the fifth control unit 214 and the sixth control unit 215 are electrically connected in communication, and the fourth control unit 213, the fifth control unit 214 and the sixth control unit 215 are electrically connected in communication. The fourth control unit 213 is electrically connected to the second end of the contact of the third relay 210, and the first end of the coil of the third relay 210 is electrically connected to the second start end, for receiving the second signal output by the second start end. The fourth control unit 213, further configured to receive the second signal and control the fifth control unit 214 to output a second high-level signal; the fifth control unit 214 is electrically connected to the second end of the coil of the fourth relay 211, and is configured to output a second high-level signal to power up the fourth relay 211; a fourth control unit 213, further configured to receive the second signal and control the sixth control unit 215 to output a second high-level signal; the sixth control unit 215 is electrically connected to the second end of the coil of the fifth relay 212, and is configured to output a second high-level signal to power up the fifth relay 212; a first end of the contact of the fourth relay 211 and a first end of the contact of the fifth relay 212 are electrically connected to the motor 105, respectively, for starting the motor 105. A fourth control unit 213, further configured to control the fifth control unit 214 and the sixth control unit 215 to output the second low level signal; a first end of the contact of the fourth relay 211 and a first end of the contact of the fifth relay 212 are electrically connected to the motor 105, respectively, for turning off the motor 105.
In one embodiment, the protection circuit further includes a motor controller 216. A first end of the motor controller 216 is electrically connected to a first end of the contact of the fourth relay 211 and a first end of the contact of the fifth relay 212, respectively, and a second end of the motor controller 216 is electrically connected to the motor 105 for controlling the start or stop of the motor 105.
In one embodiment, the protection circuit further comprises: a pilot switch 217 and a door strike switch 218. The first end of the pilot switch 217 is electrically connected to the second start end, the second end of the pilot switch 217 is electrically connected to the first end of the door latch switch 218, and the second end of the door latch switch 218 is electrically connected to the first end of the coil of the third relay 210.
The protection circuit provided by the embodiment of the utility model is applied to an electric operation machine, and comprises the following components: the starting circuit comprises a starting module 101, a power-on circuit 102, a starting circuit 103, a control module 104 and a motor 105; the starting module 101 is electrically connected to the control module 104, and is configured to provide an electrical signal to the control module, where the electrical signal includes: a first signal and a second signal; the control module 104 is electrically connected to the power-on circuit 102, and is configured to receive the first signal and output a first high-level signal to the power-on circuit 102, and the power-on circuit 102 receives the first high-level signal to power on the electric working machine; the control module 104 is electrically connected to the start circuit 103, and is further configured to output a first low level signal to the power-on circuit 102, and the power-on circuit 102 receives the first low level signal to power off the electric working machine; the control module 104 is further configured to receive the second signal and output a second high level signal to the start circuit 103; a starting circuit 103 for receiving the second high level signal to start the motor 105; the control module 104 is further configured to output a second low level signal to the start circuit 103, and the start circuit 103 is electrically connected to the motor 105 and configured to receive the second low level signal and turn off the motor 105, so that the present invention controls the power-on of the working machine and the start of the motor 105 separately through the two protection circuits, and controls the power-off of the working machine and the turn-off of the motor 105 separately through the two protection circuits, so that the electric working machine of the present invention can adapt to various usage habits of a user, and solves a problem that a power system of the electric working machine is prone to malfunction due to improper use of the user.
In the following, the use process of the protection circuit is described by using the circuit protection method applied to the protection circuit of the present invention, and the specific implementation part of the protection circuit may refer to the protection circuit part, and repeated parts are not described again, and the circuit protection method is explained by using fig. 4, where it needs to be explained: the specific implementation of the method is not only realized by the step sequence of fig. 4, but is an example for explaining the specific implementation process of the method:
Wherein the electrical signal comprises: a first signal and a second signal.
In step 402, when the electrical signal is determined to be the first signal, the control module 104 is controlled to output a first high level signal to the upper electrical circuit 102, so as to power on the electrical work machine.
Specifically, when it is determined that the electrical signal is the first signal, the control module 104 is controlled to output a first high level signal to the upper electrical circuit 102, so that the coil of the first relay 202 is powered on, the contacts of the first relay 202 are electrically connected, the coil of the second relay 203 is powered on, the contacts of the second relay 203 are electrically connected, and the power on of the electric working machine is successful.
In step 403, when the working signal of the electric working machine is not detected within a first preset time after the electric working machine is powered on, the control module 104 is controlled to output a first low level signal to the upper electric circuit 102, so as to power off the electric working machine.
Wherein the operation signal is indicative of an operation condition of the electric working machine.
Specifically, the control module 104 outputs a first low level signal to the upper electric circuit 102, so that the coil of the first relay 102 and the coil of the second relay 202 are powered off, the contact of the first relay 202 and the contact of the second relay 202 are disconnected, and the power off of the electric working machine is successful.
According to the utility model, the power-on circuit is adopted to power on the whole vehicle, but the power of the electric excavator is cut off in the first preset time period after power-on under the condition that no user uses the electric excavator, so that the potential safety hazard event caused by long-time non-operation of the excavator is effectively avoided.
In step 404, when the electrical signal is determined to be the second signal, the control module 105 is controlled to output a second high level signal to the starting circuit 103, and obtain the rotation speed of the motor 105.
Specifically, when the electrical signal is determined to be the second signal, the control module 104 is controlled to output a second high level signal to the starting circuit 103, so that the coil of the third relay 210 is powered on, the contact of the third relay 210 is electrically connected, and after the third relay 210 is powered on, the rotation speed of the motor is obtained.
Specifically, when the pilot switch 217 and the door strike switch 218 are closed, the coil of the third relay 210 is powered on, the contacts of the third relay 210 are electrically connected, and at this time, the fourth control unit 213 inputs a high level signal corresponding to the second signal. After determining that the fourth control unit 213 inputs the high level signal corresponding to the second signal, the rotation speed of the motor 105 is obtained.
And step 405, when the rotating speed is greater than the preset value, determining that the motor 105 is started successfully, and when the rotating speed is less than or equal to the preset value, determining that the motor 105 is not started successfully.
Specifically, if the second signal is detected within the second preset time, the control module 104 outputs a second high level signal to power on the coil of the fourth relay 211, the contacts of the fourth relay 211 are electrically connected, and after the third preset time, the control module 104 outputs the second high level signal to power on the coil of the fifth relay 212, and the contacts of the fifth relay 212 are electrically connected to start the motor 105, where the second preset time is less than the second preset time.
Specifically, when the rotation speed is greater than the preset value, it is determined that the motor 105 is in the start state, and at this time, the fourth control unit 213 controls the fifth control unit 214 not to output any electric signal, and at this time, the start circuit 103 is in the power-off state. After the motor 105 is determined to be started, the starting circuit 105 is in a power-off state, so that the repeated starting of the excavator is effectively avoided. In addition, after determining that the motor 105 is started, the second signal is automatically filtered out, and repeated starting of the motor 105 is avoided.
Specifically, when the motor 105 needs to be turned off, the fourth control unit 213 controls the fifth control unit 214 and the sixth control unit 215 to enable the fifth control unit 214 and the sixth control unit 215 to output the second low level signal at the same time, and at this time, the motor 105 is stopped.
In the circuit protection method applied to the protection circuit provided by the embodiment of the present invention, the electrical signal provided by the start module 101 is obtained, and the electrical signal includes: a first signal and a second signal; when the electric signal is determined to be the first signal, the control module 104 is controlled to output a first high-level signal to the upper electric circuit 102, so that the electric working machine is powered on; when the operation signal of the electric operation machine is not detected within the first preset time after the electric operation machine is powered on, the control module 104 is controlled to output a first low level signal to the upper electric circuit 102, so that the electric operation machine is powered off, and the operation signal is used for indicating the operation condition of the electric operation machine.
Further, when the electrical signal is determined to be the second signal, the control module 104 is controlled to output a second high level signal to the starting circuit 103, and acquire the rotation speed of the motor 105; when the rotating speed is greater than the preset value, determining that the motor 105 is started successfully, and when the rotating speed is less than or equal to the preset value, determining that the motor 105 is not started successfully; when the second signal is not detected within the second preset time after the motor 105 is not started successfully, the control module 104 is controlled to output a second low level signal to the starting circuit 103, so that the motor 105 is turned off, and therefore, the starting or the turning off of the motor 105 is controlled based on the parameters of the rotating speed, the duration and the like of the motor 105, so that the electric working machine can adapt to various use habits of users, and the problem that the power system of the electric working machine is prone to failure caused by improper use of the users is solved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A protection circuit for an electric working machine, the protection circuit comprising: the starting circuit comprises a starting module, a power-on circuit, a starting circuit, a control module and a motor;
the starting module is electrically connected with the control module and used for providing an electric signal for the control module, and the electric signal comprises: a first signal and a second signal;
the control module is electrically connected with the power-on circuit and used for outputting a first low level signal to the power-on circuit or receiving the first signal and outputting a first high level signal to the power-on circuit;
the power-on circuit is used for receiving the first high level signal to power on the electric operation machine or receiving the first low level signal to power off the electric operation machine;
the control module is electrically connected with the starting circuit and is also used for outputting a second low level signal to the starting circuit or receiving the second signal and outputting a second high level signal to the starting circuit;
the starting circuit is electrically connected with the motor and used for receiving the second high level signal to start the motor or receiving the second low level signal to stop the motor.
2. The protection circuit of claim 1, wherein the power-up circuit comprises: a first relay set and a first fuse;
the first end of first relay group with control module electric connection, the second end of first relay group with first fuse electric connection.
3. The protection circuit of claim 2, further comprising: the power supply module is electrically connected with the starting module and used for supplying power to the starting module;
the first relay group includes: a first relay and a second relay;
the first end of the coil of the first relay is electrically connected with the control module, the second end of the coil of the first relay is electrically connected with the negative electrode of the power module, the first end of the contact of the first relay is electrically connected with the first end of the coil of the second relay, and the second end of the contact of the first relay is electrically connected with the positive electrode of the power module;
the second end of the coil of the second relay with control module electric connection, the first end of the contact of the second relay with power module's positive pole electric connection, the second end of the contact of the second relay with first fuse electric connection.
4. The protection circuit of claim 3, wherein the start-up circuit comprises: a second relay group and a third relay group;
the first end of second relay group with start module electric connection, the second end of second relay group with motor electric connection, the first end of third relay group with control module electric connection, the second end of third relay group with motor electric connection.
5. The protection circuit of claim 4, wherein the start-up circuit further comprises: a second fuse, a third fuse, and a fourth fuse;
the second relay group includes: a third relay, the third relay set comprising: a fourth relay and a fifth relay;
a first end of a coil of the third relay is electrically connected with the starting module, a second end of the coil of the third relay is electrically connected with the ground wire, a first end of a contact of the third relay is electrically connected with the second fuse, and a second end of the contact of the third relay is electrically connected with the control module;
a first end of a coil of the fourth relay is electrically connected with the motor through the third fuse, a second end of the coil of the fourth relay is electrically connected with the control module, a first end of a contact of the fourth relay is electrically connected with the motor, and a second end of the contact of the fourth relay is electrically connected with the ground wire;
the first end of the coil of the fifth relay and the fourth fuse are electrically connected, the second end of the coil of the fifth relay and the control module are electrically connected, the first end of the contact of the fifth relay and the motor are electrically connected, and the second end of the contact of the fifth relay and the ground wire are electrically connected.
6. The protection circuit of claim 5, wherein the start-up module comprises: the first starting end and the second starting end are respectively and electrically connected with the control module;
the first starting end is used for providing the first signal for the control module;
the second starting end is used for providing the second signal for the control module.
7. The protection circuit of claim 6, wherein the control module comprises: the system comprises a first control unit, a second control unit and a third control unit, wherein the first control unit, the second control unit and the third control unit are electrically connected in a communication way;
the first control unit is electrically connected with the first starting end and used for receiving the first signal output by the first starting end;
the first control unit is further configured to control the second control unit to output the first low-level signal;
the second control unit is electrically connected with a second end of the coil of the second relay and used for outputting the first low-level signal to power off the power-on circuit;
the first control unit is further configured to receive the first signal and control the third control unit to output the first high level signal;
the third control unit is electrically connected with the first end of the coil of the first relay and used for outputting the first high-level signal to electrify the electrifying circuit.
8. The protection circuit of claim 7, wherein the control module further comprises: the control system comprises a fourth control unit, a fifth control unit and a sixth control unit, wherein the fourth control unit, the fifth control unit and the sixth control unit are electrically connected in a communication manner;
the fourth control unit is electrically connected with the second end of the contact of the third relay, and the first end of the coil of the third relay is electrically connected with the second starting end and is used for receiving a second signal output by the second starting end;
the fourth control unit is further configured to receive the second signal and control the fifth control unit to output the second high-level signal;
the fifth control unit is electrically connected with a second end of the coil of the fourth relay, and is used for outputting the second high-level signal and electrifying the fourth relay;
the fourth control unit is further configured to receive the second signal and control the sixth control unit to output the second high-level signal;
the sixth control unit is electrically connected with a second end of the coil of the fifth relay, and is used for outputting the second high-level signal and electrifying the fifth relay;
the first end of the contact of the fourth relay and the first end of the contact of the fifth relay are respectively electrically connected with the motor and used for starting the motor;
the fourth control unit is further configured to control the fifth control unit and the sixth control unit to output the second low-level signal;
and the first end of the contact of the fourth relay and the first end of the contact of the fifth relay are respectively electrically connected with the motor and used for closing the motor.
9. The protection circuit of claim 8, further comprising a motor controller;
the first end of the motor controller is electrically connected with the first end of the contact of the fourth relay and the first end of the contact of the fifth relay respectively, and the second end of the motor controller is electrically connected with the motor and used for controlling the starting or closing of the motor.
10. The protection circuit of claim 9, further comprising: a pilot switch and a door catch switch;
the first end of the pilot switch is electrically connected with the second starting end, the second end of the pilot switch is electrically connected with the first end of the door catch switch, and the second end of the door catch switch is electrically connected with the first end of the coil of the third relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121871766.9U CN215681767U (en) | 2021-08-11 | 2021-08-11 | Protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121871766.9U CN215681767U (en) | 2021-08-11 | 2021-08-11 | Protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215681767U true CN215681767U (en) | 2022-01-28 |
Family
ID=79951521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121871766.9U Active CN215681767U (en) | 2021-08-11 | 2021-08-11 | Protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215681767U (en) |
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2021
- 2021-08-11 CN CN202121871766.9U patent/CN215681767U/en active Active
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