Variable speed controller of alternating current motor

Abstract

The utility model discloses a variable speed controller of an alternating current motor, which comprises a shell, a conventional inverter, a high-capacity capacitor, a rectifying unit and a controller are arranged in the shell, a heat dissipation mechanism is arranged in the shell, the heat dissipation mechanism comprises a semiconductor chilling plate, a heat dissipation channel is arranged at the upper part of the shell, and the heat dissipation channel is in a square shape. A semiconductor chilling plate is installed between the heat dissipation channel and the shell, the cold end of the semiconductor chilling plate faces downwards, the hot end of the semiconductor chilling plate faces upwards, a first heat dissipation fin is installed on the upper portion of the semiconductor chilling plate, and a fan is installed on one side of the first heat dissipation fin. At the moment, the second heat dissipation fins and the third heat dissipation fins which are communicated with the cold end of the semiconductor chilling plate can give out cold air, and primary heat dissipation is conducted on electrical elements in the shell.

Description

TECHNICAL FIELD

[0001] The utility model discloses motor variable speed controller technical field especially relates to a variable speed controller of alternating current motor. BACKGROUND

[0002] The variable speed controller of alternating current motor, also called alternating current speed regulator or frequency converter, is a kind of power electronic control equipment, and the working principle is based on the principle of motor, and the rotating speed of motor is changed by changing the working voltage and / or frequency of motor;

[0003] During the electric energy conversion process of the variable speed controller of alternating current motor, such as rectification, inverter and other links, certain energy loss will be generated. These losses are mainly in the form of heat dissipation, which leads to the increase of the internal temperature of the controller. In high-temperature environment, the working efficiency of the motor controller may be reduced, and the service life of the components will also be affected. Long-term high-temperature work may even trigger the overheat protection mechanism of the controller, resulting in equipment shutdown. UTILITY MODEL CONTENTS

[0004] The utility model discloses a variable speed controller of alternating current motor, which can solve the problem that the existing bird repelling bomb can only repel birds by the sound produced by explosion once, and the effect is not good.

[0005] Preferably, the lower part of the semiconductor refrigerating fin is provided with a semiconductor refrigerating fin two, which is in the shape of a mouth and is attached to the inner wall of the shell.

[0006] Preferably, the upper left end of the shell is provided with an air inlet, and the lower right end of the shell is provided with a strip-shaped air inlet groove.

[0007] Preferably, the lower right end of the semiconductor refrigerating fin two is provided with a plurality of air inlet holes, which are communicated with the air inlet groove.

[0008] Preferably, a plurality of semiconductor refrigerating fins three are integrally formed and fixedly connected inside the semiconductor refrigerating fin two, and the semiconductor refrigerating fins three are arranged between the air inlet holes. ADVANTAGEOUS EFFECTS

[0009] 1. Start the semiconductor refrigerating fin and the fan. At this time, the semiconductor refrigerating fin cold end communicated semiconductor refrigerating fin two and semiconductor refrigerating fin three will emit cold air, and the electrical elements inside the shell are preliminarily cooled.

[0010] 2, by installing the fan in the heat dissipation channel, the fan will guide the hot air in the heat dissipation channel, and the heat dissipation channel will cause the air flow rate to be large at the outlet, and then will have a suction effect on the surrounding air, will drive the air of the air guide port to be extracted, and then will drive the air suction groove at the bottom of the right lower end of the shell to absorb air, and the air entering the shell will first contact the air inlet hole at the bottom of the second heat dissipation fin, and then contact the third heat dissipation fin, at this time the inhaled air will accelerate the cooling speed of fin 2 and the third heat dissipation fin, thereby accelerating the cooling speed. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the overall structure schematic diagram of the utility model;

[0012] Figure 2 It is the overall structure part cross section schematic diagram of the utility model;

[0013] Figure 3 It is the overall structure part cross section schematic diagram of the utility model;

[0014] Figure 4 It is the second heat dissipation fin structure schematic diagram of the utility model;

[0015] Figures 1 to 4 The reference signs are respectively: shell 1, heat dissipation channel 101, air guide port 102, air suction groove 103, semiconductor refrigeration piece 2, first heat dissipation fin 201, second heat dissipation fin 202, air inlet hole 203, third heat dissipation fin 204, fan 3. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0017] Refer to Figures 1 to 4The embodiment provides a variable speed controller of an alternating current motor, which comprises a shell 1, wherein the shell 1 is internally provided with existing inverters, high-capacity capacitors, rectifier units, controllers and other electronic devices required by variable speed control, and the shell 1 is internally provided with a heat dissipation mechanism, the heat dissipation mechanism comprises: a semiconductor refrigerating fin 2, the shell 1 is provided with a heat dissipation channel 101 at the upper portion, the heat dissipation channel 101 is in the shape of a mouth, the semiconductor refrigerating fin 2 is arranged between the heat dissipation channel 101 and the shell 1, the semiconductor refrigerating fin 2 is connected with a corresponding controllable switch power supply, the power supply is arranged in the shell 1, the cold end of the semiconductor refrigerating fin 2 faces downward and the hot end faces upward, the semiconductor refrigerating fin 2 is provided with heat dissipation fins one 201 at the upper portion, the heat dissipation fins one 201 are provided with a fan 3 at one side, the fan 3 is electrically connected with the power supply, the semiconductor refrigerating fin 2 is provided with heat dissipation fins two 202 at the lower portion, the heat dissipation fins two 202 are in the shape of a mouth and are mutually attached to the inner wall of the shell 1, the semiconductor refrigerating fin 2 and the fan 3 are started, at this time, the semiconductor refrigerating fin 2 will transfer heat to the heat dissipation fins one 201, then the heat of the heat dissipation fins one 201 is transferred to air through the fan 3, so that heat dissipation is realized, and at this time, the heat dissipation fins two 202 and heat dissipation fins three 204 connected with the cold end of the semiconductor refrigerating fin 2 will emit cold air; the electrical elements in the shell 1 are preliminarily heat-dissipated.

[0018] Preferably, the shell 1 is provided with an air guide opening 102 at the upper left end, the shell 1 is provided with a strip-shaped air suction groove 103 at the lower right end, the heat dissipation fins two 202 are provided with a plurality of air inlet holes 203 at the lower right end, the air inlet holes 203 are connected with the air suction groove 103, a plurality of heat dissipation fins three 204 are integrally formed and fixedly connected in the heat dissipation fins two 202, the heat dissipation fins three 204 are arranged between the air inlet holes 203, the fan 3 is arranged in the heat dissipation channel 101, at this time, the heat dissipation channel 101 will guide the air of the fan 3 into the heat dissipation channel 101, and when the heat dissipation channel 101 discharges air, the air flow rate at the outlet will be increased, then the air around will be sucked, the air of the air guide opening 102 will be extracted, at this time, the air suction groove 103 at the lower end of the shell 1 will be used to absorb air, and when the air enters the shell 1, it will first contact the air inlet holes 203 at the bottom of the heat dissipation fins two 202, the cold air at the bottom of the heat dissipation fins two 202 will be transmitted upward, and at the same time, the heat dissipation fins three 204 are arranged on the air inlet holes 203, at this time, the upward air will also contact the heat dissipation fins three 204, so that the contact area with air is increased, and the air suction speed of the fins two 202 and the heat dissipation fins three 204 is increased, so that the cooling speed is increased.

[0019] Working principle:

[0020] When used, the semiconductor refrigeration sheet 2 and the fan 3 can be started, at this time the semiconductor refrigeration sheet 2 will transfer heat to the heat dissipation fin 1 201, and then the heat dissipation fin 1 201 is transferred to the air by the fan 3, thereby dissipating heat, and at this time the cold end of the semiconductor refrigeration sheet 2 is connected to the heat dissipation fin 2 202 and the heat dissipation fin 3 204, which will emit cold air; the electrical elements inside the shell 1 are preliminarily cooled;

[0021] In order to further enhance the speed inside the shell 1, the fan 3 is installed in the heat dissipation channel 101, at this time the heat dissipation channel 101 will guide the air of the fan 3 into the heat dissipation channel 101, and the air flow rate at the outlet will be large when the heat dissipation channel 101 is discharged, then it will have a suction effect on the surrounding air, and will drive the air of the air guide opening 102 to be extracted, at this time it will drive the air suction groove 103 at the bottom right end of the shell 1 to absorb air, and the air entering the shell 1 will first contact the air inlet hole 203 at the bottom of the heat dissipation fin 2, and the cold air at the bottom of the heat dissipation fin 2 202 will be transmitted upward, and at the same time the air inlet hole 203 is provided with the heat dissipation fin 3 204, at this time the upward air will also contact the heat dissipation fin 3 204, thereby increasing the contact area with the air, at this time the inhaled air will speed up the cold air release speed of the fin 2 202 and the heat dissipation fin 3 204, thereby speeding up the cooling speed.

[0022] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A variable speed controller for an AC motor, comprising a housing (1), wherein an existing inverter, a high-capacity capacitor, a rectifier unit, and a controller are installed inside the housing (1), characterized in that: A heat dissipation mechanism is installed inside the shell (1), and the heat dissipation mechanism includes: a semiconductor cooling plate (2); a heat dissipation channel (101) is installed on the upper part of the shell (1); the heat dissipation channel (101) is in a square shape; a semiconductor cooling plate (2) is installed between the heat dissipation channel (101) and the shell (1); the cold end of the semiconductor cooling plate (2) faces downward and the hot end faces upward; a heat dissipation fin (201) is installed on the upper part of the semiconductor cooling plate (2); and a fan (3) is installed on one side of the heat dissipation fin (201).

2. The speed controller for an AC motor according to claim 1, characterized in that: A second heat dissipation fin (202) is installed at the lower part of the semiconductor refrigeration plate (2); the second heat dissipation fin (202) is in a U-shaped shape and fits in contact with the inner wall of the outer shell (1).

3. The variable speed controller for an AC motor according to claim 2, characterized in that: An air guide port (102) is provided at the upper left end of the shell (1), and a strip-shaped air intake groove (103) is provided at the lower right end of the shell (1).

4. The speed controller for an AC motor according to claim 3, characterized in that: The lower right end of the second heat dissipation fin (202) is provided with a plurality of air inlet holes (203), and the air inlet holes (203) are interconnected with the air suction groove (103).

5. The variable speed controller for an AC motor according to claim 4, characterized in that: The heat dissipation fin 2 (202) is integrally formed and fixedly connected with a plurality of heat dissipation fins 3 (204), and the heat dissipation fins 3 (204) are installed between the air inlet holes (203).

Images