CN204559320U - A kind of motor - Google Patents

Abstract

The utility model discloses a motor, which comprises a front end cover, a rear end cover, a stator, a rotor and an internal cooling fan. The interior of the motor cavity also includes a semiconductor cooling fin, a heat sink and an external cooling fan; the internal cooling fan is arranged at the rear end of the motor cavity and rotates synchronously with the rotor, and the end of the rotor shaft extends outward through the rear end cover, so The cold surface of the semiconductor cooling sheet is attached to the outside of the rear end cover, the heat sink is attached to the hot surface of the semiconductor cooling sheet, and the external cooling fan is arranged at the end of the rotor shaft to dissipate heat from the cooling fin. The motor of the utility model has good heat dissipation performance and can effectively prevent the motor from being overheated.

Description

a motor

technical field

The utility model relates to a motor.

Background technique

Motor (English: Electric machinery, commonly known as "motor") refers to an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. In the circuit, it is represented by the letter M (the old standard is D). Its main function is to generate driving torque as a power source for electrical appliances or various machinery. When the motor is energized and working, part of the electric energy will be converted into heat energy, so that the temperature of the motor itself will rise, but when the temperature of the motor is too high, it may cause damage to the inner winding of the motor, so that the motor cannot work normally. The existing measure to prevent the motor from overheating is to connect a thermal protection switch in series inside the motor. When the internal temperature of the motor reaches the protection temperature of the thermal protection switch, the motor is disconnected from the power supply to cut off the power supply of the motor. However, the existing protection measures are passive, and the motor must be stopped. Therefore, certain economic losses may be caused, especially in some automation control processes, such as medical inspection automation equipment and factory automation assembly lines. Therefore, there is an urgent need for a motor that can effectively prevent the motor from overheating without stopping the motor.

Utility model content

The technical problem to be solved by the utility model is to provide a motor capable of preventing its own temperature from being too high.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a motor, including a front end cover, a rear end cover, a stator, a rotor and an internal cooling fan, and the front end cover and the rear end cover cooperate to form a motor cavity , the stator, rotor and internal heat dissipation fan are arranged inside the motor cavity, and the motor also includes semiconductor cooling fins, heat sinks and an external heat dissipation fan; the internal heat dissipation fan is arranged at the rear end of the motor cavity and is connected with the rotor Rotate synchronously, the end of the rotor shaft extends outward through the rear end cover, the cold surface of the semiconductor cooling chip is attached to the outside of the rear end cover, the heat sink is attached to the hot surface of the semiconductor cooling sheet, and the external cooling fan is set on the The end of the rotor shaft is used to dissipate heat from the cooling fins.

Wherein, the motor also includes a DC power supply circuit, which is used to provide working current for the semiconductor cooling chip.

Wherein, the motor also includes a control circuit, the control circuit includes a temperature detection unit, a reference signal unit and a comparison circuit unit, the output end of the temperature detection unit and the output end of the reference signal unit are connected to the input end of the comparison circuit unit, and the comparison circuit The output terminal of the unit is connected with the output control terminal of the DC power supply circuit.

Wherein, the motor is a six-stage motor.

Wherein, the material of the front end cover and the rear end cover is aluminum.

Wherein, thermal conductive silica gel is filled between the rear end cover and the cold surface of the semiconductor cooling chip, and between the hot surface and the heat dissipation surface of the semiconductor cooling chip.

The beneficial effects of the utility model are: different from the existing motors in which only the internal heat dissipation fan is used to dissipate heat, and the motor must be shut down during thermal protection, the motor of the utility model is also provided with a semiconductor refrigeration sheet and an external heat dissipation fan on the rear end cover , through the cooperation of the semiconductor cooling plate with the internal cooling fan and the external cooling fan, the internal temperature of the motor can be quickly reduced, the heat dissipation performance of the motor can be improved, and the internal temperature of the motor can be reduced without stopping the motor.

Description of drawings

Fig. 1 is a structural cross-sectional view of an embodiment of the utility model motor;

Fig. 2 is a block diagram of circuit modules in an embodiment of the new type of motor;

Label description:

1. Rotor; 2. Front end cover; 3. Rear end cover; 4. Stator;

5. Internal cooling fan; 6. Semiconductor refrigeration sheet; 7. Heat sink;

8. External cooling fan.

Detailed ways

In order to describe the technical content, the achieved purpose and the effect of the present utility model in detail, the following will be described in conjunction with the embodiments and accompanying drawings.

The most critical idea of the utility model is that a semiconductor cooling chip and an external heat dissipation fan are added outside the rear end cover of the motor to transfer the heat inside the motor to the outside of the motor and improve the heat dissipation performance of the motor.

Please refer to Fig. 1, a kind of electric motor, comprises front end cover 2, rear end cover 3, stator 4, rotor 1 and internal cooling fan 5, described front end cover 2 and rear end cover 3 cooperate to encircle motor cavity, described The stator 4, the rotor 1 and the internal cooling fan 5 are arranged inside the motor cavity, and the motor also includes a semiconductor cooling fin 6, a cooling fin 7 and an external cooling fan 8;

The internal heat dissipation fan 5 is arranged at the rear end of the motor cavity and rotates synchronously with the rotor 1. The end of the rotor 1 shaft extends outward through the rear end cover 3, and the cold surface of the semiconductor cooling chip 6 is attached to the rear end cover 3 Externally, the heat sink 7 is attached to the hot surface of the semiconductor cooling plate 6, and the external heat dissipation fan 8 is arranged at the end of the rotating shaft of the rotor 1 to dissipate heat from the heat sink.

Therefore, the internal cooling fan, the rear end cover, the semiconductor cooling fins, the cooling fins and the external cooling fan constitute a refrigeration module (i.e., a heat transfer module), and the semiconductor cooling fins perform energy transfer after being energized, and the cooling of the semiconductor cooling fins The heat on the surface is transferred to the hot surface, so that the temperature of the rear end cover decreases and the temperature of the heat sink rises. Since the internal cooling fan and the external cooling fan rotate synchronously with the rotor, the internal cooling fan makes the air flow inside the motor realize internal circulation. Therefore, the temperature inside the motor is reduced, and the external heat dissipation fan dissipates heat to the heat sink to reduce the temperature of the heat sink, thereby realizing the rapid transfer of the heat inside the motor to the outside of the motor.

It can be seen from the above description that the beneficial effect of the utility model lies in that the motor of the utility model has a simple structure and excellent heat dissipation performance, and can effectively reduce the internal temperature of the motor without stopping the motor, avoiding the economic loss caused by the shutdown of the motor thermal protection .

Please refer to Fig. 2, in a preferred embodiment, the motor also includes a DC power supply circuit, the DC power supply circuit is used to provide operating current for the semiconductor refrigeration sheet; in order to facilitate the temperature control of the motor, the motor is also set A control circuit is provided, the control circuit includes a temperature detection unit, a reference signal unit and a comparison circuit unit, the temperature detection unit is used to detect the internal temperature of the motor, and the comparison circuit unit is used to compare whether the temperature signal detected by the temperature detection unit exceeds the reference signal, wherein the output terminal of the temperature detection unit and the output terminal of the reference signal unit are connected to the input terminal of the comparison circuit unit, and the output terminal of the comparison circuit unit is connected to the output control terminal of the DC power supply circuit.

Therefore, it is possible to control whether the semiconductor refrigeration sheet is energized and cooled according to the internal temperature of the motor. Only when the internal temperature of the motor reaches a certain value, cooling is performed, and when the internal temperature of the motor is lower than the specified value, cooling is not performed. This method can not only make the temperature control of the motor more flexible and intelligent, but also greatly prolong the service life of the semiconductor refrigeration chip.

The motor of the utility model can be a motor of various stages, such as a 4-stage motor, a 6-stage motor, and an 8-stage motor.

In order to further improve the heat dissipation performance of the motor, the material of the front end cover and the rear end cover is preferably aluminum, and between the rear end cover and the cold surface of the semiconductor refrigeration sheet, the hot surface and the heat dissipation surface of the semiconductor refrigeration sheet The gaps are filled with thermally conductive silica gel.

To sum up, the motor provided by the utility model has a simple structure, good heat dissipation performance, and can reduce the internal temperature of the motor without stopping the motor, and the heat dissipation function of the motor is flexible and controllable, and the service life of the semiconductor cooling plate is long.

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent transformations made by using the utility model specification and accompanying drawings, or directly or indirectly used in related technical fields, are all the same. The theory is included in the patent protection scope of the present utility model.

Claims (6)

1. A motor, comprising a front end cover, a rear end cover, a stator, a rotor and an internal heat dissipation fan, the front end cover and the rear end cover cooperate to form a motor cavity, and the stator, the rotor and the internal heat dissipation fan are arranged on the The inside of the motor cavity is characterized in that it also includes a semiconductor cooling fin, a heat sink and an external cooling fan; The internal heat dissipation fan is arranged at the rear end of the motor cavity and rotates synchronously with the rotor. The end of the rotor shaft extends outward through the rear end cover. On the hot surface of the semiconductor cooling fin, the external cooling fan is arranged at the end of the rotor shaft to dissipate heat from the cooling fin. 2 . The motor according to claim 1 , further comprising a DC power supply circuit for supplying working current to the peltier. 3 . 3. The motor according to claim 2, further comprising a control circuit, the control circuit comprising a temperature detection unit, a reference signal unit and a comparison circuit unit, the output terminal of the temperature detection unit and the output terminal of the reference signal unit The input terminal of the comparison circuit unit is connected, and the output terminal of the comparison circuit unit is connected with the output control terminal of the DC power supply circuit. 4. The motor according to claim 1, characterized in that, the motor is a six-stage motor. 5. The motor according to claim 1, wherein the material of the front end cover and the rear end cover is aluminum. 6 . The motor according to claim 1 , wherein thermal conductive silica gel is filled between the rear end cover and the cold surface of the semiconductor cooling chip, and between the hot surface and the heat dissipation surface of the semiconductor cooling chip. 7 .