Rotor Hall installation structure of embedded magnetic steel permanent magnet motor and motor

Abstract

The utility model discloses a rotor Hall installation structure of an embedded magnetic steel permanent magnet motor, which comprises an installation support and a Hall sensor, the installation support can be fixedly connected with a component on the motor, and the Hall sensor is fixedly installed on the installation support. The Hall sensor on the mounting bracket avoids a strong electromagnetic area of the stator winding and a high-temperature area generated when the stator winding works, and corresponds to the outer edge of the end part of the motor rotor, so that magnetic field induction is formed between the Hall sensor and the outer edge of the embedded magnetic steel rotor. According to the utility model, through the designed mounting bracket, the mounting position of the Hall sensor is transferred from the original mounting position in a strong electromagnetic environment, so that the Hall sensor is mounted on the side surface of the rotor, and the surface magnetic pole reflected to the rotor iron core by the embedded magnetic steel is read; therefore, the Hall sensor avoids a strong electromagnetic and strong high-temperature area, so that the Hall sensor can accurately read the polarity of the magnetic pole of the rotor. The utility model also discloses a motor.

Description

Technical Field

[0001] The utility model belongs to the technical field of filters, and in particular relates to a rotor Hall installation structure of an embedded magnetic steel permanent magnet motor and the motor. Background Art

[0002] In existing motors, Hall sensors are installed to detect the rotor position in real time. The detected rotor position signal is fed back to the controller to implement phase switching of the motor and generate a rotating magnetic field in the stator to synchronize the rotor.

[0003] The Hall sensors in traditional embedded magnetic steel motors are installed on the inner wall of the core end of the stator winding, forming a radial electric beam magnetic field induction on the circumferential surface between the stator winding and the magnetic steel on the rotor. This can ensure the position angle of the Hall sensor and has low cost. However, there are several disadvantages that are difficult to solve. First, the Hall sensor always operates in a high temperature and high electromagnetic environment. The Hall sensor works in a strong electromagnetic wrapping environment where the motor is overloaded with large current. As a result, the Hall sensor cannot read the polarity of the rotor magnetic steel under strong electromagnetic interference and cannot work. Moreover, the installation position is very narrow (especially for flat wire motors, there is no installation position for the Hall sensor), resulting in the relative position of the Hall sensor and the rotor not being accurate enough. Therefore, it is very necessary to improve the defects of the existing structure. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems raised in the above background technology and to provide a rotor Hall installation structure for an embedded permanent magnet motor.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a rotor Hall mounting structure of an embedded magnetic steel permanent magnet motor, including a mounting bracket and a Hall sensor arranged on the mounting bracket. The mounting bracket can be fixedly connected to the components on the motor, and the Hall sensor is fixedly mounted on the mounting bracket. After the mounting bracket is fixed, the mounting bracket is located at a position outside the end of the motor stator, so that the Hall sensor on the mounting bracket avoids the strong electromagnetic zone of the stator winding and the high temperature zone generated when the stator winding is working. At the same time, the Hall sensor corresponds to the outer edge of the motor rotor end, so that the Hall sensor and the outer edge of the embedded magnetic steel rotor form a magnetic field induction.

[0006] In the above-mentioned rotor Hall installation structure of an embedded permanent magnet motor, the mounting bracket is provided with multiple fixed ends, and the mounting bracket is fixedly connected to the components on the motor through the multiple fixed ends thereon, and the Hall sensor is fixedly installed with the mounting bracket and the motor.

[0007] In the above-mentioned rotor Hall installation structure of an embedded permanent magnet motor, a temperature sensor is provided on the installation bracket, and the temperature sensor is provided next to the Hall sensor.

[0008] In the above-mentioned rotor Hall installation structure of an embedded permanent magnet motor, a plurality of mounting bosses for mounting Hall sensors are provided on the mounting bracket, and the Hall sensors are fixed on the mounting bosses.

[0009] In the above-mentioned rotor Hall mounting structure of an embedded permanent magnet motor, the Hall sensor is a patch Hall sensor, and the mounting bracket is designed as a circuit board, that is, the mounting bracket is provided with a circuit connecting the Hall sensor and the temperature sensor.

[0010] In the above-mentioned rotor Hall installation structure of an embedded permanent magnet motor, the Hall sensor is fixed on the installation bracket by welding, and the Hall sensor is connected to the circuit in the installation bracket.

[0011] In the above-mentioned rotor Hall installation structure of an embedded permanent magnet motor, the Hall sensor is a wire harness type Hall sensor, and the Hall sensor is fixed on the installation bracket.

[0012] In the above-mentioned rotor Hall installation structure of an embedded permanent magnet motor, a Hall fixing groove is provided at the installation boss, and the Hall sensor is fixed in the Hall fixing groove.

[0013] An embedded permanent magnet motor comprises a stator, a rotor, a motor housing, a motor end cover, coils respectively arranged on the stator, and magnets on the rotor; adopting the above-mentioned Hall installation structure, a plurality of mounting fixing grooves for connecting to a mounting bracket are provided on the end of the stator, and a fixed connection is achieved between the mounting bracket and the stator through the cooperation between the fixed end and the mounting fixing groove; the Hall sensor is fixed on the mounting bracket to avoid the strong electromagnetic area of the stator winding and the high temperature area generated when the stator winding is in operation; at the same time, the Hall sensor corresponds to the outer edge of the motor rotor end, so that the Hall sensor and the outer edge of the embedded magnetic steel rotor form a magnetic field induction.

[0014] In the above-mentioned embedded permanent magnet motor, the mounting bracket is fixedly connected to the motor end cover.

[0015] In the above-mentioned embedded permanent magnet motor, the Hall sensor is located between the side surface of the mounting bracket and the side surface of the rotor.

[0016] The utility model has the following beneficial effects:

[0017] The utility model uses a designed mounting bracket to transfer the installation position of the Hall sensor from the original installation in a strong electromagnetic environment. The Hall sensor is located outside the stator and forms a magnetic field induction with the side of the magnetic steel on the rotor. The Hall sensor is combined with the positioning of the stator winding, so that the Hall sensor is installed on the side of the rotor and reads the surface magnetic poles reflected by the embedded magnetic steel to the rotor core; in this way, the Hall sensor avoids strong electromagnetic and high temperature areas, so that the Hall sensor can accurately read the polarity of the rotor magnetic poles.

[0018] In particular, the installation position of the existing flat wire hairpin winding stator Hall sensor is limited, while the mounting bracket of the utility model only needs a few positioning points to conveniently install the Hall sensor, and the effect is better than the encoder and the cost is lower; and the Hall sensor is removed from the high heat and high electromagnetic environment, and the Hall and the magnetic surface of the rotor can be kept at a certain distance to ensure the installation of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the first embodiment of the present utility model;

[0020] Figure 2 This is an exploded view of the first embodiment of the present utility model in conjunction with the motor;

[0021] Figure 3 This is a three-dimensional diagram of the first embodiment of the present utility model in conjunction with a motor;

[0022] Figure 4 This is a cross-sectional view of the first embodiment of the present utility model in conjunction with a motor;

[0023] Figure 5 It is a three-dimensional diagram of the second embodiment of the present utility model;

[0024] Figure 6 This is an exploded view of the second embodiment of the present utility model in conjunction with the motor;

[0025] Figure 7 This is a three-dimensional diagram of the second embodiment of the present utility model in conjunction with a motor;

[0026] Figure 8 This is a cross-sectional view of the second embodiment of the present utility model in conjunction with a motor;

[0027] Figure 9 、 Figure 10 This is a three-dimensional diagram of the stator of the motor and the mounting bracket in the present invention;

[0028] Figure 11 It is a three-dimensional diagram of the motor end cover and the mounting bracket in the utility model. DETAILED DESCRIPTION

[0029] The present invention will be further described with reference to the accompanying drawings. Example

[0030] See also Figures 1 to 4 The present invention provides a rotor Hall mounting structure for an embedded magnetic steel permanent magnet motor, comprising a mounting bracket 1 and a Hall sensor 2 arranged on the mounting bracket 1. The mounting bracket 1 can be fixedly connected to components on the motor. A plurality of fixed ends 3 are provided on the mounting bracket 1. In this embodiment, the mounting bracket 1 is fixedly connected to the motor stator 7 through the plurality of fixed ends 3 thereon. The Hall sensor 2 is fixedly mounted on the mounting bracket 1. After the mounting bracket 1 is fixed, the mounting bracket 1 is correspondingly located outside the end of the motor stator 7, so that the Hall sensor 2 on the mounting bracket 1 avoids the strong electromagnetic zone of the stator winding and the high temperature zone generated when the stator winding is working. At the same time, the Hall sensor 2 corresponds to the outer edge of the end of the motor rotor 8, so that the Hall sensor 2 forms a magnetic field induction with the outer edge of the embedded magnetic steel rotor.

[0031] Furthermore, a temperature sensor (not shown in the figure) is provided on the mounting bracket 1. The temperature sensor is provided next to the Hall sensor 2. The temperature sensor can monitor and feedback the working environment temperature of the Hall sensor 2 in real time to clearly know whether it is affected.

[0032] Furthermore, the mounting bracket 1 is provided with a plurality of mounting bosses 4 for mounting the Hall sensors 2 , and the Hall sensors 2 are fixed on the mounting bosses 4 .

[0033] The Hall sensor 2 in this embodiment is a patch-type Hall sensor, and the mounting bracket 1 is correspondingly designed as a circuit board, that is, a circuit connecting the Hall sensor and the temperature sensor is provided in the mounting bracket 1; the Hall sensor 2 is fixed to the mounting bracket 1 by soldering, and the Hall sensor 2 is connected to the circuit in the mounting bracket 1. Example

[0034] See also Figures 5 to 8 The present invention provides a rotor Hall installation structure for an embedded permanent magnet motor. The difference from the first embodiment is that the Hall sensor 2 in this embodiment is a wire harness type Hall sensor, and the Hall sensor 2 is fixed in the Hall fixing slot 5 of the mounting boss 4. Example

[0035] See also Figures 2 to 4 、 Figures 6 to 8 、 Figure 9 、 Figure 10The present invention also provides an embedded permanent magnet motor, including a stator 7, a rotor 8, a coil 9 respectively arranged on the stator 7, and a magnet 10 on the rotor 8; the Hall installation structure of the first or second embodiment is adopted, and a plurality of mounting and fixing grooves 11 for connecting the mounting bracket 1 are provided on the end of the stator 7, and the mounting bracket 1 and the stator 7 are fixedly connected by the cooperation of the fixed end 3 and the mounting and fixing groove 11. The Hall sensor 2 is fixed on the mounting bracket 1 to avoid the strong electromagnetic area of the stator winding and the high temperature area generated when the stator winding is working. At the same time, the Hall sensor 2 corresponds to the outer edge of the end of the motor rotor 8, so that the Hall sensor 2 forms a magnetic field induction with the outer edge of the embedded magnetic steel rotor.

[0036] Furthermore, the Hall sensor 2 is located between the side surface of the mounting bracket 1 and the side surface of the rotor 8 . Example

[0037] See also Figure 11 The present invention also provides an embedded permanent magnet motor. Different from Example 3, the mounting bracket 1 is fixedly connected to the motor end cover 16. The mounting bracket 1 is fixed to the motor end cover 16 by a nut 17. The motor end cover 16 is provided with a fixed connection position 18. In this embodiment, the mounting bracket 1 is designed to be ring-shaped for connection stability. At the same time, the mounting bracket can also be fixed to the motor housing 15.

[0038] The above is a detailed introduction to the rotor Hall mounting structure and motor of an embedded magnetic steel permanent magnet motor provided by an embodiment of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solutions disclosed by the present invention. At the same time, for general technical personnel in this field, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation of the present invention.

Claims

1. A rotor Hall installation structure for an embedded permanent magnet motor, characterized by: The invention comprises a mounting bracket (1) and a Hall sensor (2) arranged on the mounting bracket (1); the mounting bracket (1) can be fixedly connected to a component on a motor; the Hall sensor (2) is fixedly mounted on the mounting bracket (1); after the mounting bracket (1) is fixed, the mounting bracket (1) is located at a position outside the end of the motor stator (7), so that the Hall sensor (2) on the mounting bracket (1) avoids the strong electromagnetic area of the stator winding and the high temperature area generated when the stator winding is working; at the same time, the Hall sensor (2) corresponds to the outer edge of the end of the motor rotor (8), so that the Hall sensor (2) forms a magnetic field induction with the outer edge of the embedded magnetic steel rotor.

2. The rotor Hall installation structure of an embedded permanent magnet motor according to claim 1, characterized in that: The mounting bracket (1) is provided with a plurality of fixed ends (3), and the mounting bracket (1) is fixedly connected to components on the motor via the plurality of fixed ends (3) thereon, and the Hall sensor (2) is fixedly mounted with the motor along with the mounting bracket (1).

3. The rotor Hall installation structure of an embedded permanent magnet motor according to claim 2, characterized in that: A temperature sensor is provided on the mounting bracket (1), and the temperature sensor is provided next to the Hall sensor (2).

4. The rotor Hall installation structure of an embedded permanent magnet motor according to any one of claims 1 to 3, characterized in that: The mounting bracket (1) is provided with a plurality of mounting bosses (4) for mounting the Hall sensors (2), and the Hall sensors (2) are fixed on the mounting bosses (4).

5. The rotor Hall installation structure of an embedded permanent magnet motor according to claim 4, characterized in that: The Hall sensor (2) is a patch-type Hall sensor, and the mounting bracket (1) is correspondingly designed as a circuit board, that is, a circuit connecting the Hall sensor and the temperature sensor is provided in the mounting bracket (1).

6. The rotor Hall installation structure of an embedded permanent magnet motor according to claim 4, characterized in that: The Hall sensor (2) is fixed to the mounting bracket (1) by means of welding, and the Hall sensor (2) is connected to the circuit in the mounting bracket (1).

7. The rotor Hall installation structure of an embedded permanent magnet motor according to claim 4, characterized in that: The Hall sensor (2) is a wire harness type Hall sensor, and the Hall sensor (2) is fixed on the mounting bracket (1).

8. The rotor Hall installation structure of an embedded permanent magnet motor according to claim 4, characterized in that: A Hall fixing groove (5) is provided on the mounting boss (4), and the Hall sensor (2) is fixed in the Hall fixing groove (5).

9. An embedded permanent magnet motor, comprising a stator (7), a rotor (8), a motor housing (15), a motor end cover (16), a coil (9) respectively arranged on the stator (7), and a magnet (10) on the rotor (8); characterized in that: The invention comprises a Hall installation structure according to any one of claims 1 to 8, wherein a plurality of mounting fixing grooves (11) for connecting to the mounting bracket (1) are provided on the end of the stator (7), and the mounting bracket (1) and the stator (7) are fixedly connected by the cooperation between the fixed end (3) and the mounting fixing groove (11), and the Hall sensor (2) is fixed on the mounting bracket (1) to avoid the strong electromagnetic area of the stator winding and the high temperature area generated when the stator winding is working, and at the same time, the Hall sensor (2) corresponds to the outer edge of the end of the motor rotor (8), so that the Hall sensor (2) and the outer edge of the embedded magnetic steel rotor form a magnetic field induction.

10. The embedded permanent magnet motor according to claim 9, characterized in that: The mounting bracket (1) is fixedly connected to the motor end cover (16).

11. The embedded permanent magnet motor according to claim 9 or 10, characterized in that: The Hall sensor (2) is located between a side surface of the mounting bracket (1) and a side surface of the rotor (8).

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