CN112821357A - Water pump motor control assembly and water pump - Google Patents
Water pump motor control assembly and water pump Download PDFInfo
- Publication number
- CN112821357A CN112821357A CN202110098968.2A CN202110098968A CN112821357A CN 112821357 A CN112821357 A CN 112821357A CN 202110098968 A CN202110098968 A CN 202110098968A CN 112821357 A CN112821357 A CN 112821357A
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- China
- Prior art keywords
- water pump
- pump motor
- phase
- contact component
- controller
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/09—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against over-voltage; against reduction of voltage; against phase interruption
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention relates to the field of motors and discloses a water pump motor control assembly and a water pump, wherein the water pump motor control assembly is used for connecting a three-phase power supply of a water pump motor and comprises: the contactor comprises a driving coil, a movable contact component and a fixed contact component, one of the movable contact component and the fixed contact component is used for connecting an external three-phase power supply, the other one of the movable contact component and the fixed contact component is used for connecting a water pump motor, the driving coil is used for controlling the movable contact component and the fixed contact component to be in closed contact in a power-on state, and the driving coil is electrically connected with a phase B and a phase C in the three-phase power supply through a controller to form a control loop; and the controller is powered by the A-phase electricity and the B-phase electricity in the three-phase power supply and controls the control loop to be closed or opened under the power supply action of the A-phase electricity and the B-phase electricity. Compared with the prior art, the water pump motor control assembly and the water pump provided by the embodiment of the invention have the advantages of reducing damage to the water pump motor caused by power supply shortage.
Description
Technical Field
The invention relates to the field of motors, in particular to a water pump motor control assembly and a water pump.
Background
As a conventional electric appliance, a water pump generally uses three-phase alternating current to supply power to a water pump motor in practical application, however, if three alternating currents have a phase-lacking fault or a multi-phase fault, if one phase or multi-phase operation of the water pump motor is lacking due to various reasons, the current of the water pump motor is increased rapidly, so that the temperature of the water pump motor is increased, and finally the water pump motor is burnt. In an electric automatic control system, the open-phase operation of a motor usually depends on overload protection consisting of a thermal relay or realizes the open-phase protection function by controlling a water pump contactor to be disconnected through the relay after the open-phase is judged through the operation of three-phase operation current signals of a water pump.
However, the inventor of the present invention finds that, in the phase-loss protection method in the prior art, no matter the method is overload protection consisting of a thermal relay or a method for judging phase loss through three-phase operation current signal operation, the method is phase-loss protection performed in a click operation process, when protection is effective, a motor already operates for a period of time under the phase-loss current, the operation and transmission time of the intermediate signal often causes great damage to the water pump motor, and the insulation of a water pump winding is inevitably damaged after long-term accumulation.
Disclosure of Invention
The embodiment of the invention aims to provide a water pump motor control assembly and a water pump, which can reduce the damage of a power supply shortage to a water pump motor.
In order to solve the above technical problem, an embodiment of the present invention provides a water pump motor control assembly for connecting a three-phase power supply of a water pump motor, including: the contactor comprises a driving coil, a movable contact component and a fixed contact component, one of the movable contact component and the fixed contact component is used for connecting an external three-phase power supply, the other one of the movable contact component and the fixed contact component is used for connecting a water pump motor, the driving coil is used for controlling the movable contact component and the fixed contact component to be in closed contact in a power-on state, and the driving coil is electrically connected with a phase B and a phase C in the three-phase power supply through the controller to form a control loop; the controller is powered by the A-phase electricity and the B-phase electricity in the three-phase power supply, and the controller controls the control loop to be closed or opened under the power supply action of the A-phase electricity and the B-phase electricity.
An embodiment of the present invention also provides a water pump, including: the water pump motor and the water pump motor control assembly are used for connecting a three-phase power supply and the water pump motor.
Compared with the prior art, the controller of the water pump motor control assembly provided by the first embodiment of the invention controls the control loop to be closed or opened under the power supply action of the phase A electricity and the phase B electricity, if the phase A electricity or the phase B electricity is out of phase, the controller cannot work without power supply, and the control loop cannot be closed, so that the phase-failure protection of the phase A electricity and the phase B electricity is realized; because the driving coil is electrically connected with the B-phase power and the C-phase power in the three-phase power supply through the controller to form a control loop, if the B-phase power or the C-phase power in the three-phase power supply is in phase failure, the driving coil cannot attract the movable contact assembly to move and is in contact conduction with the fixed contact assembly without power supply, and the control loop cannot be closed at the moment, so that the phase failure protection of the C-phase power and the B-phase power is realized.
In addition, still include the circuit breaker, the circuit breaker be used for with three phase current connects and with the power transmission that three phase current provided extremely the water pump motor, the circuit breaker is used for when the water pump motor transships and/or short circuit stop to the water pump motor transmission the power that three phase current provided.
In addition, the water pump control system also comprises a current detector electrically connected with the water pump motor, wherein the current detector is used for detecting the current value of the operating current of the water pump motor and sending the current value to the controller; the controller is used for judging whether the current value is abnormal or not and controlling the contactor to stop the water pump motor when the current value is judged to be abnormal.
In addition, the controller also comprises an operator which is connected with the controller in a communication mode, and the operator is used for receiving and displaying the current value sent by the controller.
In addition, the operator comprises a control assembly, the control assembly is used for receiving a manual control instruction and sending the manual control instruction to the controller, and the controller controls the contactor to start/stop the water pump motor according to the manual control instruction.
Drawings
Fig. 1 is a schematic structural diagram of a water pump motor control assembly according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a water pump motor control assembly according to a second embodiment of the present invention;
fig. 3 is a schematic structural view of a water pump according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
A first embodiment of the present invention relates to a water pump motor control assembly, which is configured as shown in fig. 1, and includes: the water pump motor comprises a contactor 10 and a controller 20, wherein the contactor 10 comprises a driving coil 11, a moving contact component 12 and a static contact component 13, one of the moving contact component 12 and the static contact component 13 is used for being connected with an external three-phase power supply 200, the other one of the moving contact component 12 and the static contact component 13 is used for being connected with a water pump motor 100, the driving coil 11 is used for controlling the moving contact component 12 and the static contact component 13 to be in closed contact in a power-on state, and the driving coil 11 is electrically connected with a phase B and a phase C in the three; the controller 20 is powered by a phase a power supply and a phase B power supply in the three-phase power supply, and the controller 20 controls the control loop to be closed or opened under the power supply of the phase a power supply and the phase B power supply. Specifically, in the present embodiment, the driving coil 11 is electrically connected to the B phase in the three-phase power supply via the controller 20, the controller 20 is provided with the switch block K for the B phase, and the controller 20 controls the closing or opening of the control loop by controlling whether or not the B phase power is supplied to the driving coil 11 by controlling the closing and opening of the switch block K.
Compared with the prior art, the controller 10 of the water pump motor control assembly provided by the first embodiment of the invention controls the control loop to be closed or opened under the power supply action of the phase a electricity and the phase B electricity, if the phase a electricity or the phase B electricity is out of phase, the controller 10 cannot work without power supply, the control loop cannot be closed, and the water pump motor 100 cannot be started, so that the phase-loss protection of the phase a electricity and the phase B electricity is realized; because the driving coil 11 is electrically connected with the phase B electricity and the phase C electricity in the three-phase power supply through the controller 10 to form a control loop, if the phase B electricity or the phase C electricity in the three-phase power supply is in phase failure, the driving coil 11 cannot attract the moving contact component 12 to move and is in contact conduction with the fixed contact component 13 without power supply, at the moment, the control loop cannot be closed, so that the phase failure protection of the phase C electricity and the phase B electricity is realized, because the control circuit cannot be closed when the phase failure of the three-phase power supply occurs, the water pump motor 100 cannot be started, so that the water pump motor 100 is prevented from running under the phase failure current, and the damage of the phase power supply to the water pump motor 100 is reduced.
A second embodiment of the present invention relates to a water pump motor control assembly. The second embodiment is substantially the same as the first embodiment, and has a contactor 10 and a controller 20, and is mainly different in that: in the second embodiment of the present invention, as shown in fig. 2, the present invention further includes: and a circuit breaker 30, the circuit breaker 30 being adapted to be connected to a three-phase power source and to transmit power supplied from the three-phase power source to the water pump motor 100, the circuit breaker 30 being adapted to stop transmission of power supplied from the three-phase power source to the water pump motor 100 when the water pump motor 100 is overloaded and/or short-circuited.
Compared with the prior art, the water pump motor control assembly provided by the second embodiment of the invention additionally provides the circuit breaker 30 while maintaining the technical effects of the first embodiment, and the circuit breaker 30 stops transmitting the power provided by the three-phase power supply to the water pump motor 100 when the water pump motor 100 is overloaded and/or short-circuited, so that overload protection is provided for the water pump motor 100, and the safety of the operation process of the water pump motor 100 is further improved.
In addition, in the present embodiment, the water pump motor 100 further includes a current detector 40 electrically connected to the water pump motor 100, the current detector 40 is configured to detect a current value of the operation current of the water pump motor 100 during the operation of the water pump motor 100 and transmit the current value of the operation current of the water pump motor 100 to the controller 20, and the controller 20 determines whether the current value of the operation current of the water pump motor 100 is abnormal, and controls the contactor 10 to stop the water pump motor 100 when the current value is abnormal. Specifically, in the present embodiment, a current threshold range during normal operation of the water pump motor 100 may be pre-stored in the controller 20, and when the current value of the operating current of the water pump motor 100 exceeds the pre-stored current threshold range, it is determined that the current value of the operating current of the water pump motor 100 is abnormal, and the contactor 10 is controlled to stop the water pump motor 100. The current value of the running current of the water pump motor 100 is detected in the running process of the water pump motor 100, whether the water pump motor 100 runs normally or not can be judged in real time, and the abnormal running of the water pump motor 100 can be found timely, so that the safety of the running process of the water pump motor 100 is further improved.
Further, in the present embodiment, the controller 20 further includes an operator 50 communicatively connected to the controller 50, and the operator 50 is configured to receive and display a current value of the operating current of the water pump motor 100 sent by the controller 20. The operator 50 includes a control component 51, the control component 51 is configured to receive a manual control command and send the manual control command to the controller 20, and the controller 20 controls the contactor 20 to start/stop the water pump motor 100 according to the manual control command. Set up in controller 20 communication connection's operator 50, operator 50 is used for showing the current value of the operating current of water pump motor 100, the staff of operator 50 end is after observing the current value of the operating current of water pump motor 100 that operator 50 shows, can operate in control assembly 51 according to the current value, control assembly 51 receives behind staff's the manual control instruction, send the manual control instruction to controller 20, controller 20 opens/stops water pump motor 100 according to manual control instruction control contactor 20, so set up can be more convenient for the staff to control water pump motor 100 according to actual conditions.
A third embodiment of the present invention relates to a water pump, as shown in fig. 3, including: a water pump motor 100, and a water pump motor control assembly 200 as provided in the previous embodiments for connecting a three-phase power source to the water pump motor 100.
It will be appreciated that this embodiment is a water pump embodiment corresponding to the water pump motor control assembly embodiment described above, and that this embodiment can be implemented in cooperation with the water pump motor control assembly embodiment described above. The related technical details mentioned in the foregoing embodiment of the water pump motor control assembly are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related art details mentioned in this embodiment can also be applied to the aforementioned water pump motor control assembly embodiment.
It should be noted that, in the present embodiment, each of the modules is a functional module, and in practical applications, one functional module may be one physical unit, may be a part of one physical unit, and may be implemented by a combination of a plurality of physical units. In addition, in order to highlight the innovative part of the present invention, elements that are not so closely related to solving the technical problems proposed by the present invention are not introduced in the present embodiment, but this does not indicate that other elements are not present in the present embodiment.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (6)
1. A water pump motor control assembly for connecting a three-phase power supply of a water pump motor, comprising:
the contactor comprises a driving coil, a movable contact component and a fixed contact component, wherein one of the movable contact component and the fixed contact component is used for connecting an external three-phase power supply, the other one of the movable contact component and the fixed contact component is used for connecting a water pump motor, the driving coil is used for controlling the movable contact component and the fixed contact component to be in closed contact in a power-on state, and the driving coil is electrically connected with a phase B and a phase C in the three-phase power supply through a controller to form a control loop;
and the controller is powered by the A-phase electricity and the B-phase electricity in the three-phase power supply, and controls the control loop to be closed or opened under the power supply action of the A-phase electricity and the B-phase electricity.
2. The water pump motor control assembly of claim 1, further comprising a circuit breaker configured to connect to the three-phase power source and to transmit power provided by the three-phase power source to the water pump motor, the circuit breaker configured to stop transmitting power provided by the three-phase power source to the water pump motor when the water pump motor is overloaded and/or shorted.
3. The water pump motor control assembly according to claim 1, further comprising a current detector electrically connected to the water pump motor, the current detector being configured to detect a current value of an operating current of the water pump motor and send the current value to the controller;
the controller is used for judging whether the current value is abnormal or not and controlling the contactor to stop the water pump motor when the current value is judged to be abnormal.
4. The water pump motor control assembly of claim 3, further comprising an operator in communication with the controller, the operator configured to receive and display the current value sent by the controller.
5. The water pump motor control assembly of claim 4, wherein the operator comprises a control assembly configured to receive a manual control command and send the manual control command to the controller, and the controller controls the contactor to start/stop the water pump motor according to the manual control command.
6. A water pump, comprising:
a water pump motor, and a water pump motor control assembly as claimed in any one of claims 1 to 5 for connecting a three phase power supply to the water pump motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110098968.2A CN112821357A (en) | 2021-01-25 | 2021-01-25 | Water pump motor control assembly and water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110098968.2A CN112821357A (en) | 2021-01-25 | 2021-01-25 | Water pump motor control assembly and water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112821357A true CN112821357A (en) | 2021-05-18 |
Family
ID=75859171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110098968.2A Pending CN112821357A (en) | 2021-01-25 | 2021-01-25 | Water pump motor control assembly and water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112821357A (en) |
-
2021
- 2021-01-25 CN CN202110098968.2A patent/CN112821357A/en active Pending
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