CN113556001B - Low-energy-consumption three-phase asynchronous motor - Google Patents
Low-energy-consumption three-phase asynchronous motor Download PDFInfo
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- CN113556001B CN113556001B CN202110667614.5A CN202110667614A CN113556001B CN 113556001 B CN113556001 B CN 113556001B CN 202110667614 A CN202110667614 A CN 202110667614A CN 113556001 B CN113556001 B CN 113556001B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/12—Asynchronous induction motors for multi-phase current
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- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Electric Motors In General (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The application relates to a low-energy-consumption three-phase asynchronous motor, which comprises a motor shaft and a shell; the fan also comprises a heat dissipation motor, fan blades, an expansion piece, a movable conductive piece, a fixed conductive piece and a controller; the heat dissipation motor is arranged on the shell and used for driving the fan blades to rotate; one end of the expansion piece is attached to the shell; the movable conductive piece is arranged on the expansion piece and connected with the positive electrode of the power supply; the fixed conductive piece is arranged on the shell and is coupled with the controller; when the temperature of the shell is higher than a preset value, the expansion piece is heated to expand, so that the movable conductive piece is attached to the fixed conductive piece, and the controller is powered on to control the heat dissipation motor to operate. When the temperature of the casing is higher than the preset value, the volume of the expansion piece is increased, so that the movable conductive piece is attached to the fixed conductive piece, the controller is powered on to control the heat dissipation motor to operate, the fan blades are driven to rotate, electric energy is consumed to accelerate air flow, and heat dissipation is provided for the casing.
Description
Technical Field
The application relates to the field of motor heat dissipation, in particular to a low-energy-consumption three-phase asynchronous motor.
Background
The motor mainly consumes electric energy to generate driving torque to serve as a power source of various mechanical devices.
When the motor is used, part of electric energy is inevitably converted into heat energy, in order to ensure that the motor is at a normal working temperature, fan blades are usually fixedly connected to one end of a motor shaft, and when the motor works, the motor shaft rotates to output a driving torque; meanwhile, the motor shaft also drives the fan blades to rotate, air on the peripheral side of the motor is stirred, namely when the motor works, partial energy is consumed to accelerate air flow, and heat dissipation is provided for the motor.
In winter, the air temperature is low, particularly in northern areas, and can be reduced to below zero, and the heat dissipation requirement of the motor can be met only by heat exchange between the motor and low-temperature air; however, the motor shaft still drives the fan blades to rotate, and part of energy is consumed to accelerate the air flow, thereby causing unnecessary energy consumption.
Disclosure of Invention
On the basis of meeting the requirement of motor heat dissipation, the low-energy-consumption three-phase asynchronous motor is provided for reducing the energy consumption of the motor.
The application provides a low power consumption three-phase asynchronous motor adopts following technical scheme:
a low-energy-consumption three-phase asynchronous motor comprises a motor shaft and a shell; the fan also comprises a heat dissipation motor, fan blades, an expansion piece, a movable conductive piece, a fixed conductive piece and a controller;
the heat dissipation motor is arranged on the shell and used for driving the fan blades to rotate; one end of the expansion piece is attached to the shell; the movable conductive piece is arranged on the expansion piece and is connected with the positive pole of the power supply; the fixed conductive piece is arranged on the shell and is coupled with the controller;
when the temperature of the shell is higher than a preset value, the expansion piece is heated to expand, so that the movable conductive piece is attached to the fixed conductive piece, and the controller is powered on to control the heat dissipation motor to operate.
By adopting the technical scheme, only when the temperature of the casing is higher than the preset value, the volume of the expansion piece is increased, so that the movable conductive piece is attached to the fixed conductive piece, the controller is powered on to control the heat dissipation motor to operate, the fan blades are driven to rotate, the electric energy is consumed to accelerate the air flow, and the heat dissipation is provided for the casing.
If the ambient temperature is low, the heat dissipation requirement of the motor can be met only by heat exchange between the motor and low-temperature air; then, this moment, the temperature of casing is less than the default, and the volume of inflation piece is less, removes to have the interval between electrically conductive piece and the fixed electrically conductive piece, then the controller must not be electrified, and the heat dissipation motor does not operate, when only relying on the heat exchange between motor and the low temperature air promptly can satisfy the heat dissipation demand of motor, avoids consuming the electric energy in order to accelerate the air flow, realizes reducing the energy consumption.
Preferably, the mobile electric conduction piece is fixedly connected with the other end of the spring.
By adopting the technical scheme, when the temperature of the shell rises to be equal to the preset value, the volume of the expansion piece is increased, and then the movable conductive piece is attached to the fixed conductive piece; subsequently, if the temperature of the enclosure continues to rise, the volume of the expansion member continues to increase; but at this moment, the fixed conductive piece hinders the continuous movement of the movable conductive piece, and the elastic deformation of the spring is utilized to automatically compensate the change of the distance between the expansion piece and the movable conductive piece.
Preferably, the device also comprises a moving magnet and a fixed magnet which are mutually attracted; the movable magnet is fixedly connected with one end of the spring, which is far away from the expansion piece; the fixed magnet is arranged on the casing and is positioned on the periphery of the fixed conductive piece.
By adopting the technical scheme, when the temperature of the shell is lower than the preset value, the distance between the movable conductive piece and the fixed conductive piece is larger, the magnetic force between the movable conductive piece and the fixed conductive piece is smaller, the spring is pulled to deform, and the elastic force and the magnetic force of the spring are balanced.
When the temperature of the casing rises to be equal to the preset value, the volume of the expansion part is increased, the distance between the movable conductive part and the fixed conductive part is reduced, the magnetic force between the movable magnet and the fixed magnet is increased, the magnetic force is larger than the elastic force of the spring, under the action of the magnetic force, the movable conductive part overcomes the elastic force of the spring and moves towards the direction close to the fixed conductive part, the movable conductive part is attached to the fixed conductive part, the controller is powered on to control the heat dissipation motor to operate, at the moment, the movable conductive part and the fixed conductive part have extrusion force, and the sum of the extrusion force and the elastic force of the spring is equal to the magnetic force.
Along with the operation of the heat dissipation motor, the fan blades rotate to provide heat dissipation, and when the temperature of the shell is reduced to be equal to a preset value, the elastic force of the spring is still smaller than the magnetic force; the movable conductive piece and the fixed conductive piece are kept in a fit state, and the heat dissipation motor continues to operate; when the temperature of the shell is continuously reduced to be obviously lower than the preset temperature, the volume of the expansion piece is reduced, the distance between the expansion piece and the movable conductive piece is increased, the elastic force of the spring enables the movable conductive piece to overcome the magnetic force to move towards the direction far away from the fixed conductive piece until the elastic force of the spring is greater than the magnetic force, and the heat dissipation motor stops circular operation immediately.
Through the process, if the temperature of the shell fluctuates up and down in the preset temperature value only by means of heat exchange between the motor and the low-temperature air, frequent starting and stopping of the heat dissipation motor are avoided, and the service life of the heat dissipation motor is guaranteed.
Preferably, the movable magnet is arranged on one side of the movable conducting plate, which is far away from the fixed conducting plate; the fixed magnet is arranged on one side of the fixed conducting strip, which deviates from the movable conducting strip.
By adopting the technical scheme, on one hand, when the movable magnet and the fixed magnet are close to each other through the magnetic force, the movable conducting strip is ensured to be attached to the fixed conducting strip; on the other hand, when the movable conducting strip is attached to the fixed conducting strip, a certain distance is still formed between the movable magnet and the fixed magnet to limit the maximum magnetic force between the brake magnet and the fixed magnet, and after the temperature of the shell is reduced, the elastic force of the spring can be increased to be larger than the maximum magnetic force to enable the movable magnet to be far away from the fixed magnet.
Preferably, the device further comprises a sleeve, wherein the sleeve is connected with the shell; the movable conductive piece is embedded in the sleeve in a sliding mode, and one end, facing the fixed conductive piece, of the movable conductive piece extends out of the sleeve.
Through adopting above-mentioned technical scheme, the inflation piece is heated the inflation in-process many times, and the deformation direction of inflation piece probably has a small amount of deviations, then utilizes the sleeve restriction to remove the moving direction of electrically conductive piece to guarantee that inflation piece is heated the inflation back, make and remove electrically conductive piece laminating fixed electrically conductive piece.
Preferably, the expansion part is arranged outside the sleeve and is positioned on one side of the sleeve, which faces away from the fixed conductive part.
By adopting the technical scheme, the expansion piece is not limited by the sleeve, and the expansion piece can be freely deformed when the temperature of the machine shell is increased or reduced.
Preferably, the protective cover is provided with an opening, and the opening is attached to the outer wall of the shell; the inner wall of the protective cover and the outer wall of the shell form an installation cavity;
the expansion piece, the movable conductive piece and the fixed conductive piece are all arranged in the installation cavity.
By adopting the technical scheme, the heat dissipation motor operates to drive the fan blades to rotate, so that the flow of air is accelerated; at this moment, the protection casing blocks that the air current is close to the inflation piece to avoid the rapid cooling of inflation piece, be favorable to making the temperature of inflation piece and the temperature of casing keep unanimous.
Preferably, the protective cover is provided with a heat insulation layer.
By adopting the technical scheme, the heat dissipation motor operates to drive the fan blades to rotate, the flow of air is accelerated, and the air flow passes through the periphery of the protective cover and reduces the periphery of the protective cover; at this time, the heat insulating layer hinders heat exchange, maintains the temperature in the shield, and is favorable for keeping the temperature of the expansion piece consistent with that of the casing.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the temperature of the shell is higher than a preset value, the volume of the expansion piece is increased, so that the movable conductive piece is attached to the fixed conductive piece, the controller is powered on to control the heat dissipation motor to operate, the fan blades are driven to rotate, electric energy is consumed to accelerate air flow, and heat dissipation is provided for the shell;
2. when the temperature of the shell fluctuates up and down at the preset temperature value only by means of heat exchange between the motor and low-temperature air, the heat dissipation motor is prevented from being started and stopped frequently, and the service life of the heat dissipation motor is guaranteed.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.
Fig. 2 is a schematic diagram of positions of the heat dissipation motor and the fan blades.
Fig. 3 is a schematic structural diagram of the control device.
Fig. 4 is a schematic view of the trigger mechanism in state a.
Fig. 5 is a schematic view of the trigger mechanism in state B, C.
Fig. 6 is a schematic view of the trigger mechanism in the D state.
Description of the reference numerals: 1. a housing; 2. a motor shaft; 3. a heat dissipation motor; 4. a fan blade; 5. a dust cover; 51. a vent hole; 6. a control device; 61. a trigger mechanism; 611. a protective cover; 612. an expansion member; 6121. a fixed end; 6122. a free end; 613. a sleeve; 614. a spring; 615. a moving magnet; 616. moving the conductive piece; 617. fixing the conductive piece; 618. a fixed magnet; 62. and a controller.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
Referring to fig. 1 and 2, the embodiment of the present application discloses a low energy consumption three-phase asynchronous motor, which includes a casing 1, a motor shaft 2, a heat dissipation motor 3, fan blades 4 and a dust cover 5.
The shell of the heat dissipation motor 3 is fixedly connected to one end of the machine shell 1, and the output shaft of the heat dissipation motor 3 is coaxial with the motor shaft 2; the fan blades 4 are coaxially connected to an output shaft of the heat dissipation motor 3. When the heat dissipation motor 3 is operated, the fan blades 4 are driven to rotate so as to drive the air to flow. The dust cover 5 is fixedly connected to one end of the housing 1, and the dust cover 5 covers the peripheral sides of the heat dissipation motor 3 and the fan blades 4, and meanwhile, the dust cover 5 is provided with a vent hole 51 for air to flow into the dust cover 5.
Referring to fig. 1 and 2, the low power consumption three-phase asynchronous motor further comprises a control device 6, and the control device 6 is used for controlling the operation of the heat dissipation motor 3 when the temperature of the casing 1 is higher than a preset temperature. The control device 6 includes a trigger mechanism 61 and a controller 62.
Referring to fig. 2 and 3, trigger mechanism 61 includes a shield 611, an expansion member 612, a sleeve 613, a spring 614, a moving magnet 615, a moving conductor 616, a stationary conductor 617, and a stationary magnet 618.
The protective cover 611 is fixedly connected to the machine shell 1, and the protective cover 611 is provided with a heat insulation layer; one end of the protective cover 611 is provided with an opening, and the opening faces the casing 1; and further, an installation cavity is formed by enclosing the inner wall of the protective cover 611 and the outer wall of the machine shell 1. An expansion member 612, sleeve 613, spring 614, moving magnet 615, moving electrical conductor 616, stationary electrical conductor 617, and stationary magnet 618 are disposed within the mounting cavity.
Referring to fig. 3 and 4, the expansion member 612 includes a fixed end 6121 and a free end 6122 which are integrally formed; the fixing end 6121 is attached to and fixedly connected with the housing 1, so that heat transfer between the fixing end 6121 and the housing 1 is realized. Meanwhile, the expansion element 612 may be made of metal, and when the expansion element 612 expands due to heat, the free end 6122 and the fixed end 6121 move relatively. In this embodiment, a space is further provided between the free end 6122 and the housing 1, so as to facilitate deformation of the free end 6122.
The sleeve 613 is fixedly connected to the housing 1, the sleeve 613 is disposed in a hollow space, and an opening at one end of the sleeve 613 faces the free end 6122.
The axis of the spring 614 coincides with the axis of the sleeve 613; one end of the spring 614 is fixedly connected to the free end 6122, and the other end of the spring 614 is slidably embedded in the sleeve 613; a moving magnet 615 is coaxially and slidably embedded in the sleeve 613, and the moving magnet 615 is fixedly connected to the other end of the spring 614; a moving conductor 616 is fixedly connected to the side of the moving magnet 615 facing away from the spring 614, and an end of the moving conductor 616 remote from the moving magnet 615 protrudes out of the sleeve 613.
The fixed magnet 618 is fixedly connected to the casing 1, such that the fixed magnet 618 is located on a side of the sleeve 613 facing away from the expansion member 612, and the fixed magnet 618 and the moving magnet 615 are attracted to each other by magnetic force; the stationary conductive member 617 is fixedly coupled to a side of the stationary magnet 618 facing the moving magnet 615.
Meanwhile, one end of the moving conductor 616 extending out of the sleeve 613 is connected to the positive electrode of the power supply through a wire, and the fixed conductor 617 is connected to the controller 62 through a wire.
When the movable conductive member 616 is attached to the fixed conductive member 617, the circuit is turned on, and the controller 62 is powered on to control the operation of the heat dissipation motor 3; when the distance exists between the movable conductive element 616 and the fixed conductive element 617, the circuit is disconnected, the controller 62 is not powered, and the heat dissipation motor 3 stops operating.
Specifically, referring to fig. 4, in the figure, an X coordinate represents a distance between the moving magnet 615 and the fixed end 6121; the curve represents the magnitude of the magnetic force between the moving magnet 615 and the stationary magnet 618 as a function of the separation between the moving magnet 615 and the stationary end 6121, i.e., the magnetic force increases as the moving magnet 615 accelerates away from the stationary end 6121.
The straight line represents that the magnitude of the elastic force that the moving magnet 615 receives from the spring 614 varies with the distance between the moving magnet 615 and the fixed end 6121, i.e., the elastic force moves the magnet 615 away from the fixed end 6121 to increase linearly; wherein, the point X1 represents the sum of the distance between the fixed end 6121 and the free end 6122 plus the original length of the spring 614, and the point X1 moves to the right as the temperature increases and moves to the left as the temperature decreases.
Referring to fig. 4, the low power consumption three-phase asynchronous motor starts to operate, the temperature of the housing 1 is lower than the preset temperature, the trigger 61 is in the state a, and the moving magnet 615 is at the position of XA point, so that the magnetic force and the elastic force are in a balanced state. At this time, if the temperature of the housing 1 is decreased by the external airflow, the point X1 and the straight line both move leftward, resulting in the elastic force being greater than the magnetic force, the moving magnet 615 approaches the free end 6122 (which is equivalent to the moving magnet 615 moving away from the fixed magnet 618), so that the magnetic force and the elastic force restore to the equilibrium state, and in the process, the moving conductive element 616 moves away from the fixed conductive element 617 along with the moving magnet 615, so as to keep the circuit in the off state.
Referring to fig. 4, the low power consumption three-phase asynchronous motor continuously operates, the temperature of the casing 1 gradually rises (is lower than the preset temperature), the trigger mechanism 61 is still in the state a, the point X1 and the straight line both move rightward, resulting in that the magnetic force is greater than the elastic force, and the moving magnet 615 moves away from the free end 6122 (which is equivalent to that the moving magnet 615 approaches the fixed magnet 618), so that the magnetic force and the elastic force restore the equilibrium state again.
Referring to fig. 4 and 5, until the temperature of the casing 1 rises to the preset temperature, the triggering mechanism 61 is in the B state, and the B state belongs to the critical state, and the straight line (dotted line) is just tangent to the curve. If the temperature continues to rise, the point X1 and the straight line both move rightward, the magnetic force is always greater than the elastic force, and the movable conductive member 616 is attached to the fixed conductive member 617, that is, the trigger mechanism 61 is switched to the state C, the circuit is turned on, and the heat dissipation motor 3 operates.
When the temperature decreases, the point X1 and the straight line both move leftward, the trigger mechanism 61 switches to the a state, and the circuit remains in the off state.
Referring to fig. 5 and 6, when the temperature of the enclosure 1 rises and is higher than the preset temperature, the trigger mechanism 61 is in the state C, the circuit is turned on, and the heat dissipation motor 3 works to enhance the heat dissipation effect, thereby reducing the temperature of the enclosure 1; the X1 point and the straight line both move to the left.
When the temperature of the machine shell 1 is reduced to the preset temperature, the machine shell moves leftwards to be tangent to the curve, namely a dotted line in fig. 6; at this time, the magnetic force is still greater than the elastic force, i.e., the circuit remains on, and the heat dissipation motor 3 continues to operate.
When the temperature of the casing 1 continues to decrease (lower than the preset temperature), the point X1 and the straight line continue to move leftward until the triggering mechanism 61 is in the D state, and the D state belongs to the critical state, and the elastic force is just equal to the magnetic force.
If the temperature continues to decrease, the point X1 and the straight line continue to move leftward, so that the elastic force is greater than the magnetic force, and the moving magnet 615 approaches the fixing end 6121, the moving conductive sheet is away from the fixing conductive sheet, the trigger mechanism 61 is switched to the state a, the circuit is disconnected, and the heat dissipation motor 3 stops working.
If the temperature starts to rise again, the point X1 and the straight line continue to move rightwards, the magnetic force is larger than the elastic force, so that the movable conducting strip and the fixed conducting strip are kept in a joint state, namely, the circuit is kept in a conduction state, and the heat dissipation motor 3 continues to work.
The implementation principle of the low-energy-consumption three-phase asynchronous motor in the embodiment of the application is as follows: only when the temperature of the casing 1 is higher than the preset value, the volume of the expansion element 612 is increased, so that the movable conductive element 616 fits the fixed conductive element 617, the controller 62 is powered on to control the heat dissipation motor 3 to operate, the fan blades 4 are driven to rotate, electric energy is consumed to accelerate the air flow, and heat dissipation is provided for the casing 1. When the heat dissipation requirement of the motor can be met only by means of heat exchange between the motor and low-temperature air, electric energy consumption is avoided to accelerate air flow, and energy consumption is reduced.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (6)
1. A low-energy-consumption three-phase asynchronous motor comprises a motor shaft (2) and a shell (1); the method is characterized in that: the fan also comprises a heat dissipation motor (3), fan blades (4), an expansion piece (612), a movable conductive piece (616), a fixed conductive piece (617) and a controller (62);
the heat dissipation motor (3) is arranged on the casing (1), and the heat dissipation motor (3) is used for driving the fan blades (4) to rotate; one end of the expansion piece (612) is attached to the shell (1); the movable conductive piece (616) is arranged on the expansion piece (612), and the movable conductive piece (616) is connected with the positive pole of the power supply; the fixed conductive part (617) is arranged on the casing (1), and the fixed conductive part (617) is coupled with the controller (62);
when the temperature of the machine shell (1) is higher than a preset value, the expansion piece (612) is heated to expand, so that the movable conductive piece (616) is attached to the fixed conductive piece (617), and the controller (62) is electrified to control the heat dissipation motor (3) to operate;
the spring (614) is fixedly connected with one end of the spring (614) and the other end of the spring (614) is fixedly connected with the moving conductive piece (616);
also comprises a moving magnet (615) and a fixed magnet (618) which attract each other; the moving magnet (615) fixedly connects one end of the spring (614) far away from the expansion piece (612); the fixed magnet (618) is arranged on the casing (1), and the fixed magnet (618) is positioned on the periphery side of the fixed conductive piece (617).
2. The low power consumption three-phase asynchronous machine of claim 1, characterized in that: the moving magnet (615) is arranged on one side of the moving conducting strip, which is far away from the fixed conducting strip; the fixed magnet (618) is arranged on one side of the fixed conducting strip, which faces away from the movable conducting strip.
3. The low power consumption three-phase asynchronous machine according to claim 1, characterized in that: the device also comprises a sleeve (613), wherein the sleeve (613) is connected with the machine shell (1); the movable conductor (616) is slidably embedded in the sleeve (613), and one end of the movable conductor (616) extends out of the sleeve (613) towards the fixed conductor (617).
4. A low power consumption three-phase asynchronous machine according to claim 3, characterized in that: the expansion element (612) is arranged outside the sleeve (613) and on the side of the sleeve (613) facing away from the fixed conductive element (617).
5. The low power consumption three-phase asynchronous machine according to claim 1, characterized in that: the protective cover (611) is provided with an opening, and the opening is attached to the outer wall of the shell (1); the inner wall of the protective cover (611) and the outer wall of the machine shell (1) form an installation cavity;
the expansion element (612), the moving conductor (616) and the fixed conductor (617) are disposed within the mounting cavity.
6. The low power consumption three-phase asynchronous machine according to claim 5, characterized in that: the protective cover (611) is provided with a heat insulation layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110667614.5A CN113556001B (en) | 2021-06-16 | 2021-06-16 | Low-energy-consumption three-phase asynchronous motor |
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| CN202110667614.5A CN113556001B (en) | 2021-06-16 | 2021-06-16 | Low-energy-consumption three-phase asynchronous motor |
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| CN113556001B true CN113556001B (en) | 2022-08-23 |
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| US20140216031A1 (en) * | 2013-02-04 | 2014-08-07 | James E. Hill, JR. | System for converting waste energy into electricity |
| CN211530939U (en) * | 2019-12-26 | 2020-09-18 | 河南恒冠卓科技有限公司 | Heat radiator for motor |
| CN211908094U (en) * | 2020-04-25 | 2020-11-10 | 肇庆悦能科技有限公司 | Fixed panel type distribution box |
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