Control circuit of intelligent power distribution cabinet

Abstract

The utility model relates to a control circuit of an intelligent power distribution cabinet. The control circuit comprises a power supply module, an automatic control module, a prompt module, a switch control module and a motor module. The power module is connected with commercial power and used for providing electric energy for the whole circuit, and the motor module is used for providing a driving source for the water pump; the automatic control module comprises a signal output sub-module and a plurality of direct-current relays, the input end of the signal output sub-module is coupled to the power supply module, the grounding end of the signal output sub-module is grounded, and the output ends of the signal output sub-module are respectively coupled to the fourteenth input ends of the direct-current relays; a normally open contact of the direct-current relay is coupled to the prompt module, a normally closed contact and the normally open contact of the direct-current relay are both coupled to the switch control module, the input end of the switch control module is coupled to the power module, and the output end of the switch control module is coupled to the motor module. The water pump is remotely controlled, and the agricultural production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of water pump control, and in particular to a control circuit of an intelligent power distribution cabinet. Background Art

[0002] In agricultural production, it is sometimes necessary to drain groundwater or rainfall water to prevent the soil from being too wet and affecting crop growth. Water pumps are usually used to pump out the accumulated water to keep the drainage system of the farmland unobstructed. Water pumps are also widely used for irrigation of farmland, drawing water from water sources (such as rivers, lakes, wells or reservoirs) and transporting it to farmland. Therefore, water pumps play an indispensable role in agriculture, providing the necessary water resources for agricultural production and ensuring the growth and development of crops.

[0003] In the prior art, water pumps are usually started and stopped manually, requiring workers to reach the location of the water pump to start, close or adjust the operation of the water pump, which increases labor costs and workload, and may result in failure to respond to needs in a timely manner. Therefore, remote automatic control of water pumps is very important for improving agricultural production efficiency and managing water resources. Utility Model Content

[0004] In order to realize remote automatic control of water pumps and thus improve agricultural production efficiency, the present application provides a control circuit of an intelligent power distribution cabinet.

[0005] The above invention objectives of the present application are achieved through the following technical solutions:

[0006] A control circuit of an intelligent power distribution cabinet, comprising a power module, an automatic control module, a prompt module, a switch control module, and a motor module;

[0007] The power module is connected to the mains, and is used to provide electrical energy for the entire circuit, and the motor module is used to provide a driving source for the water pump;

[0008] The automatic control module comprises a signal output submodule and a plurality of DC relays, wherein the input end of the signal output submodule is coupled to the power module, the ground end of the signal output submodule is grounded, and the output end of the signal output submodule is respectively coupled to the fourteenth input end of the DC relay;

[0009] The normally closed contact and the normally open contact of the DC relay are both coupled to the switch control module, the normally open contact of the DC relay is also coupled to the prompt module, the input end of the switch control module is coupled to the power module, and the output end of the switch control module is respectively coupled to the motor module;

[0010] The signal output submodule is used to receive remote control signals. When the signal output submodule receives a start signal, it sends a start signal to several DC relays, and the DC relays then send a switch signal to the switch control module. When the switch control module receives the start signal, it turns on the motor and the power module.

[0011] By adopting the above technical solution, the signal output submodule is energized after the power module is turned on, and the output ends of the signal output submodule are respectively coupled to the fourteenth input end of the DC relay, and the normally closed contact and the normally open contact of the DC relay are both coupled to the switch control module. The signal output submodule controls the DC relay coil to be energized by the output signal, and the normally open contact of the DC relay is coupled to the prompt module. The prompt module facilitates the operator to identify the operating status of the circuit. The switch control module is energized to control the rotation of the motor module, and the motor module then drives the water pump to turn on, so as to achieve the purpose of remote automatic control of the water pump switch, which has the effect of improving agricultural production efficiency.

[0012] Optionally, the switch control module includes AC contactors KM1, KM2 and KM3, the NO input terminal of each AC contactor is coupled to the normally open contact of the same DC relay, the NO output terminal of each AC contactor is coupled to the normally open contact and normally closed contact of the same DC relay, and the normally open contact of the DC relay is coupled to the prompt module;

[0013] The motor module includes motor M1, motor M2 and motor M3. The L1, L2 and L3 input terminals of the AC contactor KM1 are coupled to the power module, and the L1, L2 and L3 output terminals of the AC contactor KM1 are coupled to the motor M1; the L1, L2 and L3 input terminals of the AC contactor KM2 are coupled to the power module, and the L1, L2 and L3 output terminals of the AC contactor KM1 are coupled to the motor M2; the L1, L2 and L3 input terminals of the AC contactor KM3 are coupled to the power module, and the L1, L2 and L3 output terminals of the AC contactor KM3 are coupled to the motor M3.

[0014] By adopting the above technical solution, when the NO output terminals and NO input terminals of the AC contactors KM1, KM2 and KM3 are energized, the AC contactors KM1, KM2 and KM3 respectively control the rotation of the motors M1, M2 and M3, which in turn drive the water pump to turn on, thereby achieving the purpose of remote automatic control of the water pump switch, which has the effect of improving agricultural production efficiency.

[0015] Optionally, the power module is coupled with a manual control module, the manual control module is used to complement the automatic control module, and the manual control module includes a stop button SB1, a stop button SB2, a stop button SB3, a start button SB4, a start button SB5 and a start button SB6;

[0016] The stop button SB1, the stop button SB2 and the stop button SB3 are respectively coupled to the normally closed contacts of different DC relays, the start button SB4 is coupled to the NO output terminal and the NO input terminal of the AC contactor KM1, the start button SB5 is coupled to the NO output terminal and the NO input terminal of the AC contactor KM2, and the start button SB6 is coupled to the NO output terminal and the NO input terminal of the AC contactor KM3;

[0017] The prompt module includes a manual / automatic first-way running light L1, a manual / automatic second-way running light L2 and a manual / automatic third-way running light L3. The manual / automatic first-way running light L1 is coupled to a start button SB4, the manual / automatic second-way running light L2 is coupled to a start button SB5, and the manual / automatic third-way running light L3 is coupled to a start button SB6.

[0018] By adopting the above technical scheme, the manual / automatic first running light L1 is coupled to the start button SB4, and the start button SB4 is coupled to the NO output terminal and the NO input terminal of the AC contactor KM1. When the automatic control module fails and the motor M1 cannot be started, the NO output terminal and the NO input terminal of the AC contactor KM1 can be energized by pressing the start button SB4, and the AC contactor KM1 controls the motor M1 to rotate. At this time, the manual / automatic first running light L1 lights up. Similarly, pressing the start button SB5 and the start button SB6 can start the motors M1 and M2 respectively; the stop button SB1, the stop button SB2 and the stop button SB3 are respectively coupled to the normally closed contacts of different DC relays. When the automatic control module fails and the motor cannot be automatically shut down, it can be manually shut down by pressing the stop button.

[0019] Optionally, the switch control module further includes AC contactors KM4, KM5 and KM6, L1, L2 and L3 input terminals of the AC contactor KM4 are coupled to the power module, and L1, L2 and L3 output terminals of the AC contactor KM4 are coupled to the motor M1; L1, L2 and L3 input terminals of the AC contactor KM5 are coupled to the power module, and L1, L2 and L3 output terminals of the AC contactor KM5 are coupled to the motor M2; L1, L2 and L3 input terminals of the AC contactor KM6 are coupled to the power module, and L1, L2 and L3 output terminals of the AC contactor KM6 are coupled to the motor M3;

[0020] The manual control module further includes a stop button SB7, a stop button SB8 and a stop button SB9, wherein the stop button SB7 is coupled to a start button SB10, the stop button SB8 is coupled to a start button SB11, and the stop button SB9 is coupled to a start button SB12;

[0021] The NO output terminal and NO input terminal of the AC contactor KM4 are respectively coupled to the start button SB10, the NO output terminal and NO input terminal of the AC contactor KM5 are respectively coupled to the start button SB11, and the NO output terminal and NO input terminal of the AC contactor KM6 are respectively coupled to the start button SB12.

[0022] By adopting the above technical scheme, the stop button SB7 is coupled to the start button SB10, the start button SB10 is coupled to the NO output terminal and the NO input terminal of the AC contactor KM4, the L1, L2 and L3 terminals of the AC contactor KM4 are respectively coupled to the power module and the motor M1, and by pressing the start button SB10, the NO output terminal and the NO input terminal of the AC contactor KM4 can be energized, and the AC contactor KM4 controls the rotation of the motor M1. By pressing the stop button SB7, the passage can be disconnected to turn off the motor M1 to realize manual control of the start and stop of the motor M1. Similarly, the cooperation of the stop button SB8 and the start button SB11 can realize the manual control of the start and stop of the motor M2, and the cooperation of the stop button SB9 and the start button SB12 can realize the manual control of the start and stop of the motor M3, so that the control circuit has the dual control functions of manual / automatic and pure manual, thereby improving the practicality and efficiency of the control circuit.

[0023] Optionally, the prompt module also includes a manual first-way running light L4, a manual second-way running light L5 and a manual third-way running light L6, the manual first-way running light L4 is coupled to the start button SB10, the manual second-way running light L5 is coupled to the start button SB11, and the manual third-way running light L6 is coupled to the start button SB12.

[0024] By adopting the above technical scheme, the manual first-way running light L4 is coupled to the start button SB10. Pressing the start button SB10 energizes the NO output and NO input of the AC contactor KM4, and the AC contactor KM4 controls the motor M1 to rotate, and the manual first-way running light L4 lights up; the manual second-way running light L5 is coupled to the start button SB11. Pressing the start button SB11 energizes the NO output and NO input of the AC contactor KM5, and the AC contactor KM5 controls the motor M2 to rotate, and the manual second-way running light L5 lights up; the manual third-way running light L6 is coupled to the start button SB12. Pressing the start button SB12 energizes the NO output and NO input of the AC contactor KM6, and the AC contactor KM6 controls the motor M3 to rotate, and the manual third-way running light L6 lights up, making it easy for the operator to identify the operating status of the circuit.

[0025] Optionally, the power supply module includes a switching power supply, an air switch K1 and a fuse, the output end of the switching power supply is respectively coupled to the automatic control module and the air switch K1, the output end of the air switch K1 is respectively coupled to the switch control module and the fuse, the fuse is coupled to the prompt module, and the air switch K1 is coupled to a power light.

[0026] By adopting the above technical solution, the output end of the air switch K1 is coupled to the fuse. The fuse serves as an overload protection device and can automatically cut off the power supply when the circuit is overloaded to prevent damage to electrical equipment or fire. The air switch K1 is coupled with a power light, so the operator can promptly find out whether the power is on, thereby avoiding accidental electric shock or other safety issues. The status of the power light can also be used to monitor the working status of the circuit. If the power light flashes abnormally or is not on, it may indicate that there is a fault in the power supply or circuit, which is convenient for timely processing.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. After the power module is turned on, the signal output submodule is powered, and the output terminals of the signal output submodule are respectively coupled to the fourteenth input terminal of the DC relay, and the normally closed contact and the normally open contact of the DC relay are both coupled to the switch control module. The signal output submodule controls the DC relay coil to be powered by the output signal, and the normally open contact of the DC relay is coupled to the prompt module. The prompt module facilitates the operator to identify the operating status of the circuit. When the NO output terminals and the NO input terminals of the AC contactors KM1, KM2 and KM3 are powered, the AC contactors KM1, KM2 and KM3 control the motors M1, M2 and M3 to rotate respectively, and the motors then drive the water pump to turn on, so as to achieve the purpose of remote automatic control of the water pump switch, which has the effect of improving agricultural production efficiency;

[0029] 2. The first manual / automatic running light L1 is coupled to the start button SB4, which is coupled to the NO output and NO input of the AC contactor KM1. When the automatic control module fails and the motor M1 cannot be started, the NO output and NO input of the AC contactor KM1 can be powered by pressing the start button SB4, and the AC contactor KM1 controls the motor M1 to rotate. At this time, the first manual / automatic running light L1 lights up. Similarly, pressing the start button SB5 and the start button SB6 can start the motors M1 and M2 respectively; the stop button SB1, the stop button SB2 and the stop button SB3 are respectively coupled to the normally closed contacts of different DC relays. When the automatic control module fails and the motor cannot be automatically shut down, it can be manually shut down by pressing the stop button;

[0030] 3. The stop button SB7 is coupled to the start button SB10, and the start button SB10 is coupled to the NO output terminal and the NO input terminal of the AC contactor KM4. The L1, L2 and L3 terminals of the AC contactor KM4 are respectively coupled to the power module and the motor M1. By pressing the start button SB10, the NO output terminal and the NO input terminal of the AC contactor KM4 can be energized, and the AC contactor KM4 controls the rotation of the motor M1. By pressing the stop button SB7, the passage can be disconnected to turn off the motor M1 to realize manual control of the start and stop of the motor M1. Similarly, the cooperation of the stop button SB8 and the start button SB11 can realize manual control of the start and stop of the motor M2, and the cooperation of the stop button SB9 and the start button SB12 can realize manual control of the start and stop of the motor M3, so that the control circuit has the dual control functions of manual / automatic and pure manual, thereby improving the practicality and efficiency of the control circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a circuit diagram of a control circuit of an intelligent power distribution cabinet provided in an embodiment of the present application;

[0032] Explanation of the reference numerals: 1. power supply module; 2. automatic control module; 21. signal output submodule; 3. prompt module; 4. switch control module; 5. manual control module. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] The present application embodiment discloses a control circuit of an intelligent power distribution cabinet. Figure 1The control circuit includes a power module 1, an automatic control module 2, a prompt module 3, a switch control module 4, motors M1, M2 and M3; the power module 1 is used to provide power for the entire circuit, and the motors M1, M2 and M3 are used to provide a driving source for the water pump; the power module 1 includes a switching power supply, an air switch K1 and a fuse, the output end of the switching power supply is respectively coupled to the automatic control module 2 and the air switch K1, the output end of the air switch K1 is respectively coupled to the switch control module 4 and the fuse, the fuse is coupled to the prompt module 3, and the air switch K1 is coupled with a power light ; The automatic control module 2 includes a signal output submodule 21 and three DC relays, the input end of the signal output submodule 21 is coupled to the power module 1, the ground end of the signal output submodule 21 is grounded, and the output end of the signal output submodule 21 is respectively coupled to the fourteenth input end of the DC relay; the switch control module 4 includes AC contactors KM1, KM2 and KM3, the NO input end of each AC contactor is coupled to the normally open contact of the same DC relay, the NO output end of each AC contactor is coupled to the normally open contact and the normally closed contact of the same DC relay, and the DC The normally open contact of the relay is coupled to the prompt module 3; the L1, L2 and L3 input terminals of the AC contactor KM1 are coupled to the power module 1, and the L1, L2 and L3 output terminals of the AC contactor KM1 are coupled to the motor M1; the L1, L2 and L3 input terminals of the AC contactor KM2 are coupled to the power module 1, and the L1, L2 and L3 output terminals of the AC contactor KM1 are coupled to the motor M2; the L1, L2 and L3 input terminals of the AC contactor KM3 are coupled to the power module 1, and the L1, L2 and L3 output terminals of the AC contactor KM3 are coupled to the motor M2. Coupled to the motor M3, the signal output submodule 21 is energized after the switch power is turned on. The signal output submodule 21 controls the DC relay coil to be energized through the output signal. The normally open contact of the DC relay is coupled to the prompt module 3. The prompt module 3 is convenient for the operator to identify the operating status of the circuit. When the NO output terminal and the NO input terminal of the AC contactors KM1, KM2 and KM3 are energized, the AC contactors KM1, KM2 and KM3 control the motors M1, M2 and M3 to rotate respectively, and the motors then drive the water pump to turn on, so as to achieve the purpose of remote automatic control of the water pump switch.

[0035] The power module 1 is coupled with a manual control module 5, which includes a stop button SB1, a stop button SB2, a stop button SB3, a start button SB4, a start button SB5 and a start button SB6; the prompt module 3 includes a manual / automatic first-way running light L1, a manual / automatic second-way running light L2 and a manual / automatic third-way running light L3;

[0036] The manual / automatic first-way running light L1 is coupled to the start button SB4, and the start button SB4 is coupled to the NO output terminal and the NO input terminal of the AC contactor KM1. When the automatic control module 2 fails and the motor M1 cannot be started, the NO output terminal and the NO input terminal of the AC contactor KM1 can be powered by pressing the start button SB4, and the AC contactor KM1 controls the motor M1 to rotate, and the manual / automatic first-way running light L1 lights up;

[0037] The manual / automatic second-way running light L2 is coupled to the start button SB5, and the start button SB5 is coupled to the NO output terminal and the NO input terminal of the AC contactor KM2. When the automatic control module 2 fails and the motor M2 cannot be started, the NO output terminal and the NO input terminal of the AC contactor KM2 can be powered by pressing the start button SB5, and the AC contactor KM2 controls the motor M2 to rotate, and the manual / automatic second-way running light L2 lights up;

[0038] The manual / automatic third-way running light L3 is coupled to the start button SB6, and the start button SB6 is coupled to the NO output terminal and the NO input terminal of the AC contactor KM3. When the automatic control module 2 fails and the motor M3 cannot be started, the NO output terminal and the NO input terminal of the AC contactor KM3 can be powered by pressing the start button SB6, and the AC contactor KM3 controls the motor M3 to rotate, and the manual / automatic third-way running light L3 lights up;

[0039] The stop button SB1, the stop button SB2 and the stop button SB3 are respectively coupled to the normally closed contacts of different DC relays. When the automatic control module 2 fails and the motor cannot be automatically shut down, it can be manually shut down by pressing the stop button.

[0040] The switch control module 4 also includes AC contactors KM4, KM5 and KM6, the L1, L2 and L3 input terminals of the AC contactor KM4 are coupled to the power module 1, and the L1, L2 and L3 output terminals of the AC contactor KM4 are coupled to the motor M1; the L1, L2 and L3 input terminals of the AC contactor KM5 are coupled to the power module 1, and the L1, L2 and L3 output terminals of the AC contactor KM5 are coupled to the motor M2; the L1, L2 and L3 input terminals of the AC contactor KM6 are coupled to the power module 1, and the L1, L2 and L3 output terminals of the AC contactor KM6 are coupled to the motor M3; the manual control module 5 also includes a stop button SB7, a stop button SB8 and a stop button SB9; the prompt module 3 also includes a manual first-way running light L4, a manual second-way running light L5 and a manual third-way running light L6;

[0041] The stop button SB7 is coupled with a start button SB10, which is coupled to the NO output terminal and the NO input terminal of the AC contactor KM4. The L1, L2 and L3 input terminals of the AC contactor KM4 are coupled to the power module 1, and the L1, L2 and L3 output terminals of the AC contactor KM4 are coupled to the motor M1. By pressing the start button SB10, the NO output terminal and the NO input terminal of the AC contactor KM4 can be energized, and the AC contactor KM4 controls the motor M1 to rotate. At this time, the manual first-way running light L4 lights up. By pressing the stop button SB7, the passage can be disconnected to turn off the motor M1 to realize manual control of the start and stop of the motor M1;

[0042] The stop button SB8 is coupled with a start button SB11, which is coupled to the NO output terminal and the NO input terminal of the AC contactor KM5. The L1, L2 and L3 input terminals of the AC contactor KM5 are coupled to the power module 1, and the L1, L2 and L3 output terminals of the AC contactor KM5 are coupled to the motor M2. By pressing the start button SB11, the NO output terminal and the NO input terminal of the AC contactor KM5 can be energized, and the AC contactor KM5 controls the motor M2 to rotate. At this time, the manual second-way running light L5 lights up. By pressing the stop button SB8, the passage can be disconnected to turn off the motor M2 to realize manual control of the start and stop of the motor M2;

[0043] The stop button SB9 is coupled to the start button SB12, and the start button SB12 is coupled to the NO output terminal and the NO input terminal of the AC contactor KM6. The L1, L2 and L3 input terminals of the AC contactor KM6 are coupled to the power module 1, and the L1, L2 and L3 output terminals of the AC contactor KM6 are coupled to the motor M3. By pressing the start button SB12, the NO output terminal and the NO input terminal of the AC contactor KM6 can be energized, and the AC contactor KM6 controls the motor M3 to rotate. At this time, the manual third-way running light L6 lights up. By pressing the stop button SB9, the path can be disconnected to turn off the motor M3 to achieve manual control of the start and stop of the motor M3.

[0044] The implementation principle of the control circuit of an intelligent power distribution cabinet in the embodiment of the present application is as follows: after the switch power is turned on, the signal output submodule 21 is energized, the output end of the signal output submodule 21 is respectively coupled to the fourteenth input end of the three DC relays, the normally open contacts of the three DC relays are respectively coupled to the manual / automatic first operating light L1, the manual / automatic second operating light L2 and the manual / automatic third operating light L3, the NO input end of each AC contactor is coupled to the normally open contact of the same DC relay, and the NO output end of each AC contactor is coupled to the same DC The normally open contact and normally closed contact of the relay, the signal output submodule 21 controls the DC relay coil to be energized through the output signal, and the manual / automatic first-way running light L1, the manual / automatic second-way running light L2 and the manual / automatic third-way running light L3 light up. When the NO output terminal and the NO input terminal of the AC contactor are energized, the AC contactor controls the motor to rotate, and the motor then drives the water pump to turn on, so as to achieve the purpose of remote automatic control of the water pump switch; when the automatic control module 2 fails and the motor M1 cannot be started, the AC can be turned on by pressing the start button SB4. The NO output and NO input of contactor KM1 are both energized, and AC contactor KM1 controls motor M1 to rotate. At this time, the manual / automatic first running light L1 lights up. Similarly, pressing start button SB5 and start button SB6 can start motors M1 and M2 respectively; stop button SB1, stop button SB2 and stop button SB3 are respectively coupled to the normally closed contacts of different DC relays. When the automatic control module 2 fails and the motor cannot be automatically shut down, it can be manually shut down by pressing the stop button; by pressing the start button SB10, the NO output and NO input of AC contactor KM4 can be energized, and AC contactor KM4 controls motor M1 to rotate. By pressing the stop button SB7, the path can be disconnected to shut down motor M1 to realize manual control of the start and stop of motor M1. Similarly, the cooperation of stop button SB8 and start button SB11 can realize manual control of the start and stop of motor M2, and the cooperation of stop button SB9 and start button SB12 can realize manual control of the start and stop of motor M3, so that the control circuit has dual control functions of manual / automatic and pure manual.

[0045] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any feature disclosed in this specification (including the abstract and drawings), unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. A control circuit of an intelligent power distribution cabinet, characterized in that: It includes a power module (1), an automatic control module (2), a prompt module (3), a switch control module (4), and a motor module; The power module (1) is connected to the mains, the power module (1) is used to provide electrical energy for the entire circuit, and the motor module is used to provide a driving source for the water pump; The automatic control module (2) comprises a signal output submodule (21) and a plurality of DC relays, wherein the input end of the signal output submodule (21) is coupled to the power module (1), the ground end of the signal output submodule (21) is grounded, and the output end of the signal output submodule (21) is respectively coupled to the fourteenth input end of the DC relay; The normally closed contact and the normally open contact of the DC relay are both coupled to the switch control module (4), the normally open contact of the DC relay is also coupled to the prompt module (3), the input end of the switch control module (4) is coupled to the power module (1), and the output end of the switch control module (4) is respectively coupled to the motor module; The signal output submodule (21) is used to receive a remote control signal. When the signal output submodule (21) receives a start signal, it sends a start signal to a plurality of DC relays. The DC relays then send a switch signal to the switch control module (4). When the switch control module (4) receives the start signal, it switches on the motor and the power supply module (1).

2. The control circuit of an intelligent power distribution cabinet according to claim 1 is characterized in that: The motor module comprises a motor M1, a motor M2 and a motor M3, the switch control module (4) comprises AC contactors KM1, KM2 and KM3, the NO input end of each AC contactor is coupled to the normally open contact of the same DC relay, the NO output end of each AC contactor is coupled to the normally open contact and normally closed contact of the same DC relay, and the normally open contact of the DC relay is coupled to the prompt module (3); The L1, L2 and L3 input terminals of the AC contactor KM1 are coupled to the power module (1), and the L1, L2 and L3 output terminals of the AC contactor KM1 are coupled to the motor M1; The L1, L2 and L3 input terminals of the AC contactor KM2 are coupled to the power module (1), and the L1, L2 and L3 output terminals of the AC contactor KM1 are coupled to the motor M2; The L1, L2 and L3 input terminals of the AC contactor KM3 are coupled to the power module (1), and the L1, L2 and L3 output terminals of the AC contactor KM3 are coupled to the motor M3.

3. The control circuit of an intelligent power distribution cabinet according to claim 2 is characterized in that: The power module (1) is coupled to a manual control module (5), the manual control module (5) is used to complement the automatic control module (2), the manual control module (5) comprises a stop button SB1, a stop button SB2, a stop button SB3, a start button SB4, a start button SB5 and a start button SB6; the stop button SB1, the stop button SB2 and the stop button SB3 are respectively coupled to the normally closed contacts of different DC relays, the start button SB4 is coupled to the NO output terminal and the NO input terminal of the AC contactor KM1 , the start button SB5 is coupled to the NO output terminal and the NO input terminal of the AC contactor KM2, and the start button SB6 is coupled to the NO output terminal and the NO input terminal of the AC contactor KM3; the prompt module (3) includes a manual / automatic first-way running light L1, a manual / automatic second-way running light L2 and a manual / automatic third-way running light L3, the manual / automatic first-way running light L1 is coupled to the start button SB4, the manual / automatic second-way running light L2 is coupled to the start button SB5, and the manual / automatic third-way running light L3 is coupled to the start button SB6.

4. The control circuit of an intelligent power distribution cabinet according to claim 3 is characterized in that: The switch control module (4) further comprises AC contactors KM4, KM5 and KM6, wherein L1, L2 and L3 input terminals of the AC contactor KM4 are coupled to the power module (1), and L1, L2 and L3 output terminals of the AC contactor KM4 are coupled to the motor M1; The L1, L2 and L3 input terminals of the AC contactor KM5 are coupled to the power module (1), and the L1, L2 and L3 output terminals of the AC contactor KM5 are coupled to the motor M2; The L1, L2 and L3 input terminals of the AC contactor KM6 are coupled to the power module (1), and the L1, L2 and L3 output terminals of the AC contactor KM6 are coupled to the motor M3; The manual control module (5) further comprises a stop button SB7, a stop button SB8 and a stop button SB9, wherein the stop button SB7 is coupled to a start button SB10, the stop button SB8 is coupled to a start button SB11, and the stop button SB9 is coupled to a start button SB12; The NO output terminal and NO input terminal of the AC contactor KM4 are respectively coupled to the start button SB10, the NO output terminal and NO input terminal of the AC contactor KM5 are respectively coupled to the start button SB11, and the NO output terminal and NO input terminal of the AC contactor KM6 are respectively coupled to the start button SB12.

5. The control circuit of an intelligent power distribution cabinet according to claim 4 is characterized in that: The prompt module (3) also includes a manual first-way running light L4, a manual second-way running light L5 and a manual third-way running light L6, the manual first-way running light L4 is coupled to the start button SB10, the manual second-way running light L5 is coupled to the start button SB11, and the manual third-way running light L6 is coupled to the start button SB12.

6. The control circuit of an intelligent power distribution cabinet according to claim 1 is characterized in that: The power supply module (1) comprises a switching power supply, an air switch K1 and a fuse. The output end of the switching power supply is respectively coupled to the automatic control module (2) and the air switch K1. The output end of the air switch K1 is respectively coupled to the switch control module (4) and the fuse. The fuse is coupled to the prompt module (3). The air switch K1 is coupled to a power light.

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