Three-phase motor and servo device

Abstract

The invention provides a three-phase motor and a servo device, and relates to the technical field of motors. The three-phase motor at least comprises four output terminals, namely a U-phase terminal, a V-phase terminal, a W-phase terminal and an O terminal, and the U-phase terminal, the V-phase terminal and the W-phase terminal are arranged in the circumferential direction, namely, the U-phase terminal, the V-phase terminal and the W-phase terminal are arranged in the circumferential direction; the O terminal is located at a first position between the V-phase terminal and the W-phase terminal or at a second position between the U-phase terminal and the V-phase terminal, namely, the O terminal is exchanged with the original W-phase terminal or the V-phase terminal. Therefore, the Y-type connection method is kept unchanged, and the problems of bridging terminal connection and easy occurrence of interphase short circuit do not exist when the Y-type connection method is changed into the delta-type connection method.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 2024113873527, filed on October 1, 2024, entitled “Three-phase motor and servo device”. Technical Field

[0003] This invention relates to the field of motor technology, and more specifically, to a three-phase motor and a servo device. Background Technology

[0004] Typically, three-phase motors have two types of winding connections: Y-connection and delta-connection. This allows the motor to handle different operating voltages with different connection methods. In a Y-connection, the corresponding terminals of the three windings are connected sequentially to the corresponding terminals of the three-phase inverter controller, while the non-corresponding terminals are connected to the O terminal of the three-phase inverter controller, forming a closed star circuit. This is suitable for applications with higher voltages. In a delta-connection, the start and end points of the three coils in the motor are connected sequentially, forming a closed delta circuit in the power supply. This is suitable for applications with lower voltages or higher power.

[0005] In related technologies, different connection methods for three-phase motors are selected based on the needs of different application scenarios. If the Y-type connection in a three-phase motor is directly changed to the Δ-type connection, cross-terminal wiring is required, and the safety needs to be further improved. Summary of the Invention

[0006] The present invention provides a three-phase motor, which includes four output terminals, namely a U-phase terminal, a V-phase terminal, a W-phase terminal and an O-phase terminal; the U-phase terminal, the V-phase terminal and the W-phase terminal are arranged circumferentially in the three-phase motor, and the O-phase terminal is located at a first position between the V-phase terminal and the W-phase terminal; or, the O-phase terminal is located at a second position between the U-phase terminal and the V-phase terminal.

[0007] The three-phase motor includes four output terminals: U-phase terminal, V-phase terminal, W-phase terminal, and O-phase terminal. The O-phase terminal is located in a first position between the V-phase terminal and the W-phase terminal; or, the O-phase terminal is located in a second position between the U-phase terminal and the V-phase terminal. When the Y-type connection is changed to the Δ-type connection, the number of jumper terminals is reduced, thus improving the safety of the three-phase motor.

[0008] Another aspect of the present application provides a servo device, the servo device comprising: the three-phase motor provided in the first aspect and the three-phase inverter controller, each phase output end of the three-phase inverter controller is connected with the corresponding phase terminal in the three-phase motor, the three-phase motor is used for rotating under the action of the target driving signal issued by the three-phase inverter controller, the target driving signal is the driving signal under the Y connection mode or the driving signal under the delta connection mode.

[0009] The three-phase motor comprises four output terminals, namely a U-phase terminal, a V-phase terminal, a W-phase terminal and an O terminal, the O terminal is located at a first position between the V-phase terminal and the W-phase terminal, or the O terminal is located at a second position between the U-phase terminal and the V-phase terminal, the cross-terminal connecting line is reduced when the Y connection mode is changed into the delta connection mode, the safety of the three-phase motor is improved, and the safety of the servo device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced below, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0011] Figure 1 The figure is a schematic diagram of the Y connection mode and the delta connection mode in the related technology of the embodiments of the present application;

[0012] Figure 2 The figure is a schematic diagram of five pins on a winding coil of one phase in the three-phase motor in the related technology;

[0013] Figure 3 The figure is a schematic diagram of the pins of the three-phase winding coil formed by three sets of coil windings and the claw-type magnetic pole shoe after assembly in the related technology;

[0014] Figure 4 The figure is a schematic diagram of the delta connection mode in the related technology;

[0015] Figure 5 The figure is a schematic diagram of the three-phase motor provided in the embodiments of the present application;

[0016] Figure 6 The figure is a schematic diagram of the delta connection mode when the O terminal is at the first position in the three-phase motor provided in the embodiments of the present application;

[0017] Figure 7 The figure is a schematic diagram of the delta connection mode when the O terminal is at the second position in the three-phase motor provided in the embodiments of the present application;

[0018] Figure 8A schematic view of Y-type connection when the O terminal is in the first position in the three-phase motor is provided for the embodiment of the present application.

[0019] Figure 9 A structural schematic view of the servo device is provided for the embodiment of the present application.

[0020] Icon: 100-three-phase motor; 101-U phase terminal; 102-V phase terminal; 103-W phase terminal; 104-O terminal; 105-PE terminal; 1-first conductive pin; 2-second conductive pin; 3-third conductive pin, 4-fourth conductive pin; 5-fifth conductive pin; 6-sixth conductive pin; 7-first suspended pin; 8-second suspended pin; 9-third suspended pin; 10-fourth suspended pin; 11-fifth suspended pin; 12-sixth suspended pin; 111-first conductive connection structure; 112-second conductive connection structure; 113-third conductive connection structure; 1121-first part; 1122-second part; 200-servo device; 201-three-phase inverter controller; DETAILED DESCRIPTION

[0021] The technical solutions of the specific embodiments will be described below with reference to the accompanying drawings.

[0022] It should be noted that although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that those skilled in the art can still modify, combine or equivalently replace the present application, and all technical solutions and improvements that do not deviate from the spirit and scope of the present application should be covered within the scope of the claims of the present application.

[0023] Before the technical solutions provided by the present application are described in detail, the background art related to the present application is explained.

[0024] Firstly, the three-phase motor related to the present application can be a three-phase claw pole type permanent magnet motor, which has the advantages of simple structure, small size, slow speed, large torque, etc., and is gradually applied to various servo devices. Among them, the three-phase claw pole type permanent magnet motor can be used as a stepping motor, which mainly controls the winding of the stepping motor to be forward or reverse energized in a certain time sequence according to the external input control pulse and direction signal, so that the motor rotates forward / reverse, or is locked; it can also be used as a permanent magnet synchronous motor to continuously run, so as to rotate quickly and efficiently to achieve the required multi-turn angle.

[0025] The three-phase claw pole type permanent magnet motor is usually controlled and driven by a three-phase inverter bridge, and the currently mature three-phase brushless motor driving control software can be used to realize continuous and efficient synchronous rotation and angle number control.

[0026] Secondly, the structure of the three-phase motor provided in the related art is briefly described.

[0027] In the related art, the winding of the three-phase motor includes two types of connection methods, i.e., Y-type connection and Δ-type connection, so that the motor can cope with different working voltages with the same winding structure. Referring to Figure 1 , it is a principle diagram of the Y-type connection and the Δ-type connection provided in the related art. Among them, since the three coils of the Δ-type connection all have current when driving current, the driving torque is larger, which can be used in low voltage or large power occasions. By changing the Y-type connection to the Δ-type connection, a motor specification can be increased.

[0028] Figure 2 is a structure diagram of one of the winding coils in the three-phase claw type permanent magnet motor in the related art, as shown in Figure 2 , each winding coil of the three-phase claw type permanent magnet motor includes 5 pins. Among them, each pin can be fixed to the skeleton of the winding coil.

[0029] Referring to Figure 3 , after assembling the three sets of winding coils in the three-phase motor with the claw type magnetic pole shoe, the pins of the three-phase winding coils form a 3*5 pin matrix, each column is fixed with one lead terminal, which is defined as PE terminal, U-phase terminal, V-phase terminal, W-phase terminal and O terminal respectively. Among them, PE is the ground terminal connected to the motor shell; the U-phase terminal, the V-phase terminal and the W-phase terminal are respectively connected to the corresponding phase output terminals of the three-phase inverter controller, i.e., the U-phase terminal is connected to the U-phase output terminal of the three-phase inverter controller, the V-phase terminal is connected to the V-phase output terminal of the three-phase inverter controller, and the W-phase terminal is connected to the W-phase output terminal of the three-phase inverter controller; O is the center terminal of the three-phase coil winding, which is connected to form Y connection through the same column connection. The O terminal can be externally led or internally hidden.

[0030] Figure 3 is a Y connection method, i.e., the same name terminals (i.e., both heads or tails) of the three winding coils are connected to the O terminal, and the non-same name terminals are respectively connected to the corresponding phase terminals. Specifically, the non-same name terminals of the U-phase coil are connected to the U-phase terminal, the non-same name terminals of the V-phase coil are connected to the V-phase terminal, and the non-same name terminals of the W-phase coil are connected to the W-phase terminal.

[0031] Referring to Figure 3 , the Y-type connection shown in Figure 3 is adopted, only the same name terminals of each phase winding are connected to the O terminal, and the non-same name terminals are connected to the corresponding phase terminals; however, if it is necessary to change the above Figure 3The Y-connection shown is modified to a Δ-connection, but this introduces a problem with cross-terminal connections. Specifically, when the winding head of phase U needs to connect to the winding tail of phase V, it must cross the terminal of phase W; and when the winding head of phase W needs to connect to the winding tail of phase U, it must cross the terminals of phase V and phase W. This not only complicates the insulation process but also increases the risk of phase-to-phase short circuits.

[0032] Figure 4 This includes: (a)-(f), where, Figure 4 Image (a) is a schematic diagram of a delta connection. Figure 4 (b) is a side view of the connection between the O-phase terminal and the V-phase terminal in a delta connection. Figure 4 Image (c) is a front view of the connection between the O-phase terminal and the V-phase terminal in a delta connection. Figure 4 Image (d) is a front view of the connection between the O-phase terminal and the W-phase terminal in a delta connection. Figure 4 Image (e) is a front view of the connection between the O-phase terminal and the U-phase terminal in a delta connection. Figure 4 (f) is a side view of the connection between the O-phase terminal and the U-phase terminal in the Δ-type connection.

[0033] Specifically, refer to Figure 4 In (a), the Δ-type connection eliminates the conductive plate of terminal O, but pin O on the U-phase coil must be connected to column V; pin O on the V-phase coil must be connected to column W; and pin O on the W-phase coil must be connected to column U. Continue to refer to... Figure 4 In sections (b)-(f), to achieve the above connections and avoid short circuits with other pins, the cross-pin connectors are designed as follows: Figure 4 The shape shown in (b) or 4(f), as Figure 4 As shown in (b), the OV connector of the U-phase pin is bridge-shaped, and the bridge surface needs to have openings to prevent accidental contact with the W pin; as Figure 4 As shown in (f), the OU connector of the W phase pin is also in the shape of a bridge and needs to span the V and W pins. The bridge surface needs to have a long hole so as not to touch the V and W pins. Figure 3 The circles or triangles in (c)-(e) represent solder joints, indicating that the connecting piece is soldered to the pin and is energized.

[0034] Therefore, the above-mentioned Figures 4-6 The modified connection method shown has problems with the connection of the bridging terminals, and is prone to phase-to-phase short circuits. In addition, the phase windings of the Δ-type connection are incompatible with the phase windings of the Y-type connection.

[0035] The embodiment of the present application is based on the above problems, and provides a three-phase motor 100, which comprises four output terminals, namely a U-phase terminal 101, a V-phase terminal 102, a W-phase terminal 103 and an O terminal. The U-phase terminal 101, the V-phase terminal 102 and the W-phase terminal 103 are arranged in a circumferential direction, i.e., the U-phase terminal 101, the V-phase terminal 102 and the W-phase terminal 103 are arranged along the circumferential direction of a stator. The O terminal is located at a first position between the U-phase terminal 101 and the V-phase terminal 102 or at a second position between the V-phase terminal 102 and the W-phase terminal 103. That is, the rightmost O terminal shown in the related art Figures 5-6 is arranged between the U-phase terminal 101, the V-phase terminal 102 and the W-phase terminal 103, i.e., the O terminal is exchanged with the original W-phase terminal 103 or exchanged with the V-phase terminal 102. In this way, the Y connection method remains unchanged, and the problem of the cross-terminal connection line in the structure of the three-phase motor 100 provided in the related art when the Y connection method in the three-phase motor 100 is directly changed to the Δ connection method is reduced, and the possibility of inter-phase short circuit is reduced.

[0036] The structure of the three-phase motor 100 of the present application is described in detail through multiple embodiments.

[0037] Reference Figure 3 The three-phase motor 100 comprises four output terminals, namely a U-phase terminal 101, a V-phase terminal 102, a W-phase terminal 103 and an O terminal 104.

[0038] Reference Figure 6 The U-phase terminal 101, the V-phase terminal 102 and the W-phase terminal 103 are arranged in a circumferential direction, and the O terminal 104 is located at a first position between the V-phase terminal 102 and the W-phase terminal 103 or at a second position between the U-phase terminal 101 and the V-phase terminal 102. Specifically, the U-phase terminal 101, the V-phase terminal 102 and the W-phase terminal 103 can be arranged at a certain preset interval along the circumferential direction, i.e., the interval distance between the phase terminals can be equal or not equal. At the same time, the O terminal is arranged at the first position between the V-phase terminal 102 and the W-phase terminal 103 or at the second position between the U-phase terminal 101 and the V-phase terminal 102, i.e., the rightmost O terminal in the related art Figure 6The rightmost O terminal 104 shown is positioned between the U-phase terminal 101, V-phase terminal 102, and W-phase terminal 103. That is, O terminal 104 can be swapped with the original W-phase terminal 103 or with the V-phase terminal 102. This ensures the Y-type connection remains unchanged. Taking the first position of O terminal 104 when changing the Y-type connection to a Δ-type connection as an example, when the winding head of the U-phase needs to connect to the winding tail of the V-phase, it does not need to cross the W-phase terminal 103. This reduces the number of bridging terminals present when changing the Y-type connection in the three-phase motor 100 structure provided in related technologies to a Δ-type connection, thus reducing the possibility of phase-to-phase short circuits.

[0039] In summary, this application provides a three-phase motor with four output terminals: a U-phase terminal, a V-phase terminal, a W-phase terminal, and an O-phase terminal. The U-phase, V-phase, and W-phase terminals are arranged circumferentially, meaning they are aligned along the circumference of the stator. The O-phase terminal is located at a first position between the V-phase and W-phase terminals or a second position between the U-phase and V-phase terminals. In other words, the O-phase terminal in the three-phase motor structure provided in related technologies is positioned between the U-phase, V-phase, and W-phase terminals, meaning it is interchanged with either the original W-phase terminal or the V-phase terminal. This maintains the Y-type connection method while reducing the need for jumper terminal connections when converting a Y-type connection to a Δ-type connection, and also reduces the possibility of phase-to-phase short circuits.

[0040] Optionally, refer to Figure 6 As shown, the U-phase terminal 101 includes a first conductive pin 1, the V-phase terminal 102 includes a second conductive pin 2, the W-phase terminal 103 includes a third conductive pin 3, and the O-phase terminal 104 includes a fourth conductive pin 4, a fifth conductive pin 5, and a sixth conductive pin 6. The first conductive pin 1 and the sixth conductive pin 6 are electrically connected, the second conductive pin 2 and the fourth conductive pin 4 are electrically connected, and the third conductive pin 3 and the fifth conductive pin 5 are electrically connected.

[0041] The first conductive pin 1 is a conductive pin located on the U-phase terminal 101, used to connect to the non-same-name terminal of the U-phase winding coil.

[0042] The second conductive pin 2 is a conductive pin located on the V-phase terminal 102, used to connect to the non-same-name terminal of the V-phase winding coil.

[0043] The third conductive pin 3 is a conductive pin located on the W-phase terminal 103, used to connect to the non-same-name terminal of the W-phase winding coil.

[0044] The fourth conductive pin 4, the fifth conductive pin 5, and the sixth conductive pin 6 are three conductive pins on the O terminal 104, used to connect to the same-name terminals of each phase winding coil.

[0045] like Figure 6 As shown, in order to realize the Δ connection of the three-phase motor 100, the first conductive pin 1 and the sixth conductive pin 6 can be electrically connected by a conductive connecting strip. Similarly, the second conductive pin 2 and the fourth conductive pin 4 can be electrically connected by a conductive connecting strip, and the third conductive pin 3 and the fifth conductive pin 5 can be electrically connected by a conductive connecting strip. Thus, the heads and tails of each phase winding coil are connected to form a closed delta circuit.

[0046] In the three-phase motor 100, the winding coils of each phase are connected in the same way. This makes it easy to add a motor specification by changing the Y-type connection to the Δ-type connection without changing the motor structure size. This reduces the incompatibility problem between the windings of the Δ-type connection and the windings of the Y-type connection in related technologies.

[0047] exist Figure 6 Based on the provided structure, taking the first position of O terminal 104 located between V phase terminal 102 and W phase terminal 103 as an example, the connection structure between the phase terminals in the Δ connection of the three-phase motor 100 is introduced as follows:

[0048] The following embodiments will be used to explain in detail how to achieve the electrical connection between the first conductive pin 1 and the sixth conductive pin 6, the electrical connection between the second conductive pin 2 and the fourth conductive pin 4, and the electrical connection between the third conductive pin 3 and the fifth conductive pin 5.

[0049] Optionally, continue to refer to Figure 6 The three-phase motor 100 includes a first conductive connection structure 111, a second conductive connection structure 112, and a third conductive connection structure 113;

[0050] One end of the first conductive connection structure 111 is soldered to the fourth conductive pin 4, and the other end of the first conductive connection structure 111 is electrically connected to the second conductive pin 2.

[0051] One end of the second conductive connection structure 112 is soldered to the fifth conductive pin 5, and the other end of the second conductive connection structure 112 is electrically connected to the third conductive pin 3.

[0052] One end of the third conductive connection structure 113 is soldered to the sixth conductive pin 6, and the other end of the third conductive connection structure 113 is electrically connected to the first conductive pin 1.

[0053] In this example, one end of the first conductive connection structure 111 is soldered to the fourth conductive pin 4, and the other end of the first conductive connection structure 111 can be soldered to the conductive plate of the V-phase terminal 102, so that the other end of the first conductive connection structure 111 is electrically connected to the third conductive pin 3; one end of the second conductive connection structure 112 is soldered to the fifth conductive pin 5, and the other end of the second conductive connection structure 112 can be soldered to the conductive plate of the W-phase terminal 103, so that the other end of the second conductive connection structure 112 is electrically connected to the third conductive pin 3; one end of the third conductive connection structure 113 is soldered to the sixth conductive pin 6, and the other end of the third conductive connection structure 113 can be soldered to the conductive plate of the U-phase terminal 101, so that the third conductive connection structure 113 is electrically connected to the first conductive pin 1. Thus, the heads and tails of each phase winding coil are connected, forming a closed delta circuit.

[0054] Optionally, refer to Figure 6 As shown, the explanation will be given using the example of the first position where the O terminal 104 is located between the V phase terminal 102 and the W phase terminal 103.

[0055] In one feasible approach, for example, to improve the compactness of the terminal layout of each phase in a three-phase motor, it is proposed that the first conductive connection structure 111, the second conductive connection structure 112, and the third conductive connection structure 113 are all horizontal strips, and the first conductive connection structure (111), the second conductive connection structure 112, and the third conductive connection structure 113 are arranged in parallel.

[0056] V-phase terminal 102 includes a first floating pin 7, one end of the first conductive connection structure 111 is welded to the fourth conductive pin 4, the other end of the first conductive connection structure 111 is welded to the first floating pin 7, and is electrically connected to the second conductive pin 2 through the conductive plate of V-phase terminal 102;

[0057] The W-phase terminal 103 includes a second floating pin 8, one end of the second conductive connection structure 112 is welded to the fifth conductive pin 5, the other end of the second conductive connection structure 112 is welded to the second floating pin 8, and is electrically connected to the third conductive pin 3 through the conductive plate of the W-phase terminal;

[0058] The U-phase terminal 101 includes a third floating pin 9, one end of the third conductive connection structure 113 is soldered to the sixth conductive pin 6, the other end of the third conductive connection structure 113 is soldered to the third floating pin 9, and is electrically connected to the first conductive pin 1 through the conductive plate of the U-phase terminal.

[0059] In this embodiment, when the O terminal 104 is located in the first position between the V phase terminal 102 and the W phase terminal 103, when it is necessary to change the Y-type connection to the Δ-type connection, it is only necessary to add a conductive connection structure between the O terminal 104 and each phase terminal to reduce the bridge connection.

[0060] Specifically, when it is necessary to change the Y-type connection to the Δ-type connection, a horizontal conductive connection structure is added between the O terminal 104 and each of the V-phase terminal 102, W-phase terminal 103, and U-phase terminal 101. This allows the fourth conductive pin 4 connected to the O terminal 104 to be electrically connected to the second conductive pin 2 of the V-phase terminal 102 via the first conductive connection structure 111, the fifth conductive pin 5 connected to the O terminal 104 to be electrically connected to the third conductive pin 3 of the W-phase terminal 103 via the second conductive connection structure 112, and the sixth conductive pin 6 connected to the O terminal 104 to be electrically connected to the first conductive pin 1 of the U-phase terminal 101 via the third conductive connection structure 113. In this way, the start and end of the three winding coils in the three-phase motor 100 are connected sequentially, i.e., in a Δ-type connection. This reduces the number of bridging terminals when changing the Y-type connection to a Δ-type connection in related technologies, improves safety, and also reduces bridges.

[0061] Therefore, from the above Figure 7 As can be seen, by swapping the O-phase terminal and the W-phase terminal in the related technology, while retaining the Y-connection, a connecting plate can be added between the O-phase terminal and each phase terminal, without crossing the pins of other terminals. This reliably converts the Y-connection to the Δ-connection, reducing the possibility of crossing the terminal connections and phase-to-phase short circuits when converting the Y-connection in a three-phase motor to the Δ-connection in the related technology.

[0062] Optionally, continue to refer to Figures 6-7 As shown, the V-phase terminal 102 includes a fourth floating pin 10, which is located between the third floating pin 9 and the sixth conductive pin 6. The fourth floating pin 10 is soldered to the third conductive connection structure 113.

[0063] In this embodiment, to improve the stability of the third conductive connection structure 113, a fourth floating pin 10 can be soldered to the third conductive connection structure 113, and the soldering point of the fourth floating pin 10 is located between the soldering point of the third floating pin 9 and the soldering point of the sixth conductive pin 6. That is, the third floating pin 9, the fourth floating pin 10, and the sixth conductive pin 6 are all soldered to the third conductive connection structure 113 simultaneously, which enhances the fixing strength of the third conductive connection structure 113.

[0064] Optionally, refer to Figures 6-7 As shown, the explanation will be given using the example of the O terminal being located between the V phase terminal 102 and the W phase terminal 103.

[0065] In one possible implementation, for example, the first conductive connection structure 111 and the third conductive connection structure 113 are horizontal strips, and the second conductive connection structure 112 includes a first part 1121 and a second part 1122, the first part 1121 is a horizontal strip, the second part 1122 is partially inclined, and the second part 1122 extends from one end of the first part 1121 toward the fifth conductive pin 5.

[0066] The V-phase terminal 102 includes a first floating pin 7, one end of the first conductive connection structure 111 is welded to the fourth conductive pin 4, and the other end of the first conductive connection structure 111 is welded to the first floating pin 7 and electrically connected to the second conductive pin 2 through the conductive plate of the V-phase terminal.

[0067] The end of the first part 1121 away from the second part 1122 is soldered to the third conductive pin 3, and the end of the second part 1122 away from the first part 1121 is soldered to the fifth conductive pin 5.

[0068] The U-phase terminal 101 includes a third floating pin 9, one end of the third conductive connection structure 113 is soldered to the sixth conductive pin 6, the other end of the third conductive connection structure 113 is soldered to the third floating pin 9, and is electrically connected to the first conductive pin 1 through the conductive plate of the U-phase terminal 101.

[0069] In this embodiment, when the O terminal is located in the second position between the U-phase terminal 101 and the V-phase terminal 102, when it is necessary to change the Y-type connection to the Δ-type connection, a horizontal conductive connection structure is added between the O terminal 104 and the U-phase terminal 101 and the V-phase terminal 102, and a conductive connection structure including a horizontal structure portion and a bent portion is added between the O terminal 104 and the W-phase terminal 103, which can reduce the number of bridging connections.

[0070] Specifically, when it is necessary to change the Y-type connection to the Δ-type connection, a horizontal first conductive connection structure 111 is added between the O-phase terminal 104 and the V-phase terminal 102, so that the fourth conductive pin 4 connected to the O-phase terminal 104 is electrically connected to the second conductive pin 2 of the V-phase terminal 102 via the first conductive connection structure 111; a horizontal third conductive connection structure 113 is added between the O-phase terminal 104 and the U-phase terminal 101, so that the sixth conductive pin 6 connected to the O-phase terminal 104 is electrically connected via the third conductive connection structure 113. The first conductive pin 1 on the U-phase terminal 101 is connected to the third conductive pin 3 on the W-phase terminal 103 via the second conductive connection structure 112. By adding a third conductive connection structure 113 including a transverse structure and a bent portion between the O-phase terminal 104 and the W-phase terminal 103, the fifth conductive pin 5 connected to the O-phase terminal 104 is electrically connected to the third conductive pin 3 on the W-phase terminal 103 via the second conductive connection structure 112. Thus, the head and tail of the three winding coils in the three-phase motor 100 are connected in sequence, i.e., the Δ connection method, which reduces the number of bridging terminal connections when changing the Y-type connection method to the Δ connection method in related technologies, and can also reduce the number of bridges.

[0071] Optionally, the V-phase terminal 102 includes a fourth floating pin 10 located between the third conductive pin 3 and the sixth conductive pin 6, and the other end of the first portion 1121 is soldered to the fourth floating pin 10.

[0072] In this embodiment, in order to improve the stability of the second conductive connection structure 112, the fourth suspended pin 10 can also be welded to the bending position of the second conductive connection structure 112, that is, the third conductive pin 3, the fourth suspended pin 10 and the fifth conductive pin 5 are all welded to the second conductive connection structure 112 at the same time, which can improve the fixing strength of the second conductive connection structure 112 and thus improve the safety of the three-phase motor.

[0073] Optionally, the angle between the first part 1121 and the second part 1122 is 45°.

[0074] In this embodiment, to avoid the problem of cross-terminal connection when the fifth conductive pin 5 connected to the O terminal 104 is electrically connected to the third conductive pin 3 of the W phase terminal 103 via the second conductive connection structure 112, the angle between the lateral structural portion and the bent portion in the second conductive connection structure 112 can be set to a preset angle, such as 45 degrees or 40 degrees. This allows the connection to the third conductive pin 3 of the W phase terminal 103 to be bypassed by the V phase terminal 102 at a 45° angle downwards via the second suspended pin 8, without using a bridge. Therefore, by moving the O phase terminal between the U phase terminal 101 and the V phase terminal 102, while retaining the Y connection, the lateral structural portion and the bent portion in the second conductive connection structure 112 at a 45-degree angle reduce the cross-crossing of other terminal pins and reliably change the Y connection to a Δ connection. This also improves the compactness of the terminal layout of each phase in the three-phase motor.

[0075] Optionally, refer to Figures 6-7 As shown, the conductive plate of the V-phase terminal 102 is shorter than the conductive plate of the W-phase terminal 103 and the conductive plate of the U-phase terminal 101, and there is a gap between one end of the V-phase terminal 102 and the third conductive connection structure 113.

[0076] In this example, refer to Figure 8 As shown, the first floating pin 7 and the second conductive pin 2 are soldered to the conductive plate of the V-phase terminal 102, and the fourth floating pin 10 does not need to be soldered to the conductive plate of the V-phase terminal 102; at the same time, there is a gap between one end of the V-phase terminal 102 and the second conductive connection structure 112, that is, the conductive plate of the V-phase terminal 102 and the second conductive connection structure 112 do not need to be directly electrically connected. In this way, the possibility of phase-to-phase short circuits can be reduced, and the crossover of pins across other terminals can be reduced, thus reliably converting the Y connection to a Δ connection.

[0077] Optionally, the first ends of the conductive plates of the V-phase terminal 102, the W-phase terminal 103, and the U-phase terminal 101 can be flush.

[0078] from Figure 8 As shown, the connecting plate added between the O terminal 104 and the U-phase terminal 101, V-phase terminal 102, and W-phase terminal 103 can effectively solve the problem of crossing terminals in related technologies. Furthermore, the connecting plate added between the O terminal 104 and the U-phase terminal 101, V-phase terminal 102, and W-phase terminal 103 can also ensure the fixing strength of each phase terminal in the three-phase motor 100.

[0079] Optionally, with Figure 8For example, the U-phase terminal 101 also includes a fifth floating pin 11, and the W-phase terminal 103 also includes a sixth floating pin 12. Therefore, multiple pins in each phase terminal and three conductive pins in the O terminal can be combined to form a pin array.

[0080] In this embodiment, reference Figure 9 As shown, the pins of the three-phase winding coils in the three-phase motor 100 form a 3*5 pin matrix, with one fixed lead-out terminal in each column, which are defined as PE terminal 105, U-phase terminal 101, V-phase terminal 102, W-phase terminal 103, and O terminal 104, respectively.

[0081] Among them, PE terminal 105 is a grounding terminal used to connect to the housing of three-phase motor 100, U-phase terminal 101 is used to connect to the U-phase output terminal of three-phase inverter controller 201, V-phase terminal 102 is used to connect to the V-phase output terminal of three-phase inverter controller 201, and W-phase terminal is used to connect to the W-phase output terminal of three-phase inverter controller 201.

[0082] The three-phase motor 100 is used to rotate under the action of the target drive signal issued by the three-phase inverter controller 201. The target drive signal is a drive signal under Y-connection or a drive signal under Δ-connection.

[0083] Among them, the Y-type connection is suitable for applications with higher voltage; the Δ-type connection has current in all three coils when the drive is energized, so its driving torque is larger and it can be used for applications with lower voltage or higher power.

[0084] In this example, for instance, if the target drive signal received by the three-phase motor 100 is a drive signal under the Y-connection, then the three-phase motor 100 will rotate clockwise (or counterclockwise) under the action of the drive signal under the Y-connection, thereby achieving continuous and efficient synchronous rotation and angle control.

[0085] Optionally, continue to refer to Figure 9 As shown, the same-name terminal of the U-phase winding coil in the three-phase motor 100 is electrically connected to the fourth conductive pin 4, and the non-same-name terminal of the U-phase winding coil is electrically connected to the first conductive pin 1.

[0086] In the three-phase motor 100, the same-name terminal of the V-phase winding coil is electrically connected to the fifth conductive pin 5, and the non-same-name terminal of the V-phase winding coil is electrically connected to the second conductive pin 2.

[0087] In the three-phase motor 100, the same-name terminal of the W-phase winding coil is electrically connected to the sixth conductive pin 6, and the non-same-name terminal of the W-phase winding coil is electrically connected to the third conductive pin 3.

[0088] In this context, "same-name terminals" refer to the starting or ending terminals of all phase windings. For example, the starting terminals of each phase winding are electrically connected to terminal O. The three-phase motor 100 includes a fourth conductive connection structure 114, which is electrically connected to the fourth conductive pin 4, the fifth conductive pin 5, and the sixth conductive pin 6. The ending terminals of each phase winding are electrically connected to the corresponding phase terminals. Specifically, the starting terminal of the U-phase winding is electrically connected to the fourth conductive pin 4 in terminal O, and the ending terminal of the U-phase winding is electrically connected to the first conductive pin 1 in U-phase terminal 101; the starting terminal of the V-phase winding is electrically connected to the fifth conductive pin 5 in terminal O, and the ending terminal of the V-phase winding is electrically connected to the second conductive pin 2 in V-phase terminal 102; the starting terminal of the W-phase winding is electrically connected to the sixth conductive pin 6 in terminal O, and the ending terminal of the W-phase winding is electrically connected to the third conductive pin 3 in W-phase terminal 103. That is, the three conductive pins in the O terminal are the winding heads of the corresponding phase windings in the three-phase motor 100, and the conductive pins in each phase terminal are the winding tails of the corresponding phase winding coils in the three-phase motor 100.

[0089] For example, the starting ends of each phase winding coil can be electrically connected to the corresponding phase terminal, and the ending ends of each phase winding coil can be electrically connected to the O terminal. Specifically, the starting end of the U-phase winding coil is electrically connected to the first conductive pin 1 in the U-phase terminal 101, and the ending end of the U-phase winding coil is electrically connected to the fourth conductive pin 4 in the O terminal; the starting end of the V-phase winding coil is electrically connected to the second conductive pin 2 in the V-phase terminal 102, and the ending end of the V-phase winding coil is electrically connected to the fifth conductive pin 5 in the O terminal; and the starting end of the W-phase winding coil is electrically connected to the third conductive pin 3 in the W-phase terminal 103, and the ending end of the W-phase winding coil is electrically connected to the sixth conductive pin 6 in the O terminal. That is, the three conductive pins in the O terminal are the winding ends of the corresponding phase winding coils in the three-phase motor 100, and the conductive pins in each phase terminal are the winding ends of the corresponding phase winding coils in the three-phase motor 100.

[0090] Therefore, from the above ​ It is known that when the three-phase motor 100 adopts a Y-type connection or a Δ-type connection, the connection method of each phase winding coil in the three-phase motor 100 is the same. In this way, it is possible to easily add a motor specification without changing the motor structure size by changing the Y-type connection to a Δ-type connection, thereby reducing the incompatibility problem between the phase windings of the Δ-type connection and the phase windings of the Y-type connection in related technologies.

[0091] refer to ​As shown in the figure, this application also provides a structural schematic diagram of a servo device 200, which includes: a three-phase motor 100 and a three-phase inverter controller 201 provided in the above embodiments. Each phase output terminal of the three-phase inverter controller 201 is connected to the corresponding phase terminal of the three-phase motor 100. The three-phase motor 100 is used to rotate under the action of a target drive signal issued by the three-phase inverter controller 201. The target drive signal is a drive signal under Y-type connection or a drive signal under Δ-type connection.

[0092] The servo device 200 can be a servo device 200 in various electric valves, electronic expansion valves, electric dampers, robot servos, or other automated machinery.

[0093] In this embodiment, the three-phase motor 100 is used to receive the target drive signal sent by the three-phase inverter controller 201. The target drive signal is a drive signal under Y-connection or a drive signal under Δ-connection and rotates clockwise (or counterclockwise) under the action of the target drive signal to achieve continuous and efficient synchronous rotation and rotation angle control.

[0094] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0095] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0096] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0097] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A three-phase motor, characterized in that, The three-phase motor (100) includes four output terminals, namely U-phase terminal (101), V-phase terminal (102), W-phase terminal (103) and O-phase terminal (104); The U-phase terminal (101), the V-phase terminal (102), and the W-phase terminal (103) are arranged circumferentially in the three-phase motor, and the O-phase terminal (104) is located at a first position between the V-phase terminal (102) and the W-phase terminal (103); or, the O-phase terminal (104) is located at a second position between the U-phase terminal (101) and the V-phase terminal (102).

2. The three-phase motor according to claim 1, characterized in that, The U-phase terminal (101) includes a first conductive pin (1), the V-phase terminal (102) includes a second conductive pin (2), the W-phase terminal (103) includes a third conductive pin (3), and the O-phase terminal (104) includes a fourth conductive pin (4), a fifth conductive pin (5), and a sixth conductive pin (6). The first conductive pin (1) is electrically connected to the sixth conductive pin (6), the second conductive pin (2) is electrically connected to the fourth conductive pin (4), and the third conductive pin (3) is electrically connected to the fifth conductive pin (5).

3. The three-phase motor according to claim 2, characterized in that, The three-phase motor (100) includes a first conductive connection structure (111), a second conductive connection structure (112), and a third conductive connection structure (113); One end of the first conductive connection structure (111) is soldered to the fourth conductive pin (4), and the other end of the first conductive connection structure (111) is electrically connected to the second conductive pin (2); One end of the second conductive connection structure (112) is soldered to the fifth conductive pin (5), and the other end of the second conductive connection structure (112) is electrically connected to the third conductive pin (3); One end of the third conductive connection structure (113) is soldered to the sixth conductive pin (6), and the other end of the third conductive connection structure (113) is electrically connected to the first conductive pin (1); Alternatively, the three-phase motor (100) includes a fourth conductive connection structure (114) which is electrically connected to the fourth conductive pin (4), the fifth conductive pin (5), and the sixth conductive pin (6).

4. The three-phase motor according to claim 3, characterized in that, The first conductive connection structure (111), the second conductive connection structure (112), and the third conductive connection structure (113) are all horizontal strips, and the first conductive connection structure (111), the second conductive connection structure (112), and the third conductive connection structure (113) are arranged in parallel. The V-phase terminal (102) includes a first floating pin (7), one end of the first conductive connection structure (111) is welded to the fourth conductive pin (4), the other end of the first conductive connection structure (111) is welded to the first floating pin (7), and is electrically connected to the second conductive pin (2) through the conductive plate of the V-phase terminal (102); The W-phase terminal (103) includes a second floating pin (8), one end of the second conductive connection structure (112) is welded to the fifth conductive pin (5), the other end of the second conductive connection structure (112) is welded to the second floating pin (8), and is electrically connected to the third conductive pin (3) through the conductive plate of the W-phase terminal (103); The U-phase terminal (101) includes a third floating pin (9), one end of the third conductive connection structure (113) is welded to the sixth conductive pin (6), the other end of the third conductive connection structure (113) is welded to the third floating pin (9), and is electrically connected to the first conductive pin (1) through the conductive plate of the U-phase terminal (101).

5. The three-phase motor according to claim 4, characterized in that, The V-phase terminal (102) includes a fourth floating pin (10), which is located between the third floating pin (9) and the sixth conductive pin (6), and the third conductive connection structure (113) is welded to the fourth floating pin (10).

6. The three-phase motor according to claim 3, characterized in that, The first conductive connection structure (111) and the third conductive connection structure (113) are horizontal strips. The second conductive connection structure (112) includes a first part (1121) and a second part (1122). The first part (1121) is a horizontal strip. The second part (1122) is inclined and extends from one end of the first part (1121) toward the fifth conductive pin (5). The V-phase terminal (102) includes a first floating pin (7), one end of the first conductive connection structure (111) is welded to the fourth conductive pin (4), the other end of the first conductive connection structure (111) is welded to the first floating pin (7), and is electrically connected to the second conductive pin (2) through the conductive plate of the V-phase terminal (102); The end of the first part (1121) away from the second part (1122) is soldered to the third conductive pin (3), and the end of the second part (1122) away from the first part (1121) is soldered to the fifth conductive pin (5). The U-phase terminal (101) includes a third floating pin (9), one end of the third conductive connection structure (113) is welded to the sixth conductive pin (6), the other end of the third conductive connection structure (113) is welded to the third floating pin (9), and is electrically connected to the first conductive pin (1) through the conductive plate of the U-phase terminal (101).

7. The three-phase motor according to claim 6, characterized in that, The V-phase terminal (102) includes a fourth floating pin (10), which is located between the third conductive pin (3) and the sixth conductive pin (6), and the other end of the first part is soldered to the fourth floating pin (10).

8. The three-phase motor according to claim 6, characterized in that, The angle between the first part (1121) and the second part (1122) is 45°.

9. The three-phase motor according to claim 2, characterized in that, The same-name terminal of the U-phase winding coil in the three-phase motor (100) is electrically connected to the fourth conductive pin (4), and the non-same-name terminal of the U-phase winding coil is electrically connected to the first conductive pin (1). The same-name terminal of the V-phase winding coil in the three-phase motor (100) is electrically connected to the fifth conductive pin (5), and the non-same-name terminal of the V-phase winding coil is electrically connected to the second conductive pin (2); The same-name terminal of the W-phase winding coil in the three-phase motor (100) is electrically connected to the sixth conductive pin (6), and the non-same-name terminal of the W-phase winding coil is electrically connected to the third conductive pin (3).

10. A servo device, characterized in that, The servo device (200) includes: a three-phase motor (100) as described in any one of claims 1-9 and a three-phase inverter controller (201), wherein each phase output terminal of the three-phase inverter controller (201) is connected to the corresponding phase terminal of the three-phase motor (100), and the three-phase motor (100) is used to rotate under the action of a target drive signal issued by the three-phase inverter controller (201), wherein the target drive signal is a drive signal under Y-type connection or a drive signal under Δ-type connection.

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