TW202349835A - Motor system - Google Patents

Abstract

This motor system inverter-controls a motor (2). The motor system comprises: a stator module (20A) in which coils (24) are wound around a plurality of teeth (22) disposed at intervals in the circumferential direction around the motor rotating shaft line (0); and a power module (30) in which a plurality of upper/lower arm device sets (31) each corresponding to each phase are attached to a base member (34). The module (20A) and the module (30A) are disposed at positions aligned in the motor rotating shaft line direction. The module (20A) is attached to the base member (34) on one side, and the upper/lower arm device sets (31) are attached to the base member (34) on the other side.

Description

Motor system

The present invention relates to a motor system.

As a conventional motor system, for example, a motor system including a three-phase AC motor and a power supply control unit is known (for example, see Patent Document 1). The previous motor system provided a support frame on the casing of the multi-phase motor, and the power control unit was mounted on the support frame. [Prior art documents] [Patent Document]

[Patent Document 1] Japanese Patent Application Publication No. 2021-35261

[Problem to be solved by the invention]

On the other hand, a multi-phase motor requires a power module for supplying current corresponding to each phase.

However, the power module is usually built into the power control unit. That is, in the previous motor system, the power module is arranged outside the motor. Therefore, the previous motor system requires the multi-phase motor and power module to be manufactured (developed) separately. In addition, regarding the above-mentioned conventional motor system, since the power module is arranged outside the motor, there is room for improvement in miniaturization (space saving) of the motor system.

An object of the present invention is to provide a motor system that can be miniaturized by assembling a power module inside a multi-phase motor. [Means to solve the problem]

The motor system of the present invention is used for inverter control of a multi-phase motor. The motor system includes: a stator module, in which coils are wound around a plurality of teeth arranged at intervals in the circumferential direction around the rotation axis of the motor. ; and a power module, which is composed of a plurality of upper and lower arm devices corresponding to each of them, installed on the base member. The stator module and the power module are arranged in a position aligned along the direction of the motor rotation axis, so The stator module is installed on one side of the base member in the direction of the motor rotation axis, and the plurality of upper and lower arm device groups are installed on the other side of the base member in the direction of the motor rotation axis.

Preferably, in the motor system of the present invention, the stator module includes a plurality of phase stator modules divided into each phase along the circumferential direction around the motor rotation axis, and the power module includes a plurality of phase stator modules divided along the circumferential direction around the motor rotation axis. Multiple phase power modules divided according to each phase.

Preferably, in the motor system of the present invention, when viewed from the direction of the motor rotation axis, the phase stator module and the phase power module corresponding to the phase stator module are arranged around the motor rotation axis. Positions aligned with each other circumferentially.

In the motor system of the present invention, the phase stator module can be divided according to each phase.

In the motor system of the present invention, the phase power module can be divided according to each phase.

Preferably, the motor system of the present invention further includes a power module control unit for controlling the power module, and the power module control unit is disposed across the power module in the direction of the motor rotation axis. The stator module is on the opposite side.

Preferably, in the motor system of the present invention, the polyphase motor is a brushless three-phase AC motor with a number of poles P and a number of slots S, and the number of poles P and the number of slots S satisfy the following relational expression (1 ) and the brushless three-phase AC motor of relationship (2). P=3n±1 (n: positive odd number except 1)…(1) S=3n (n: positive odd number except 1)…(2)

In the motor system of the present invention, the coils can be wound around one of the teeth through concentrated winding.

Preferably, in the motor system of the present invention, the stator module includes a plurality of phase stator modules divided into each phase along the circumferential direction around the motor rotation axis, and the upper and lower arm devices corresponding to each phase and the corresponding The phase stator modules form a pair.

In the motor system of the present invention, the coils can be wound around a plurality of teeth through distributed winding.

In the motor system of the present invention, the multi-phase motor may be an axial gap motor.

In the motor system of the present invention, the multi-phase motor may be a radial gap motor.

The motor system of the present invention may additionally include a transmission. [Effects of the invention]

According to the present invention, a motor system can be provided that achieves miniaturization by assembling a power module inside a multi-phase motor.

Hereinafter, the motor system according to the embodiment of the present invention will be described with reference to the drawings.

FIG. 1 schematically shows an example of a control device system to which the motor system of the present invention can be applied.

In FIG. 1 , reference numeral 1 represents the basic structure of the motor system of the present invention. The motor system 1 is a motor system for inverter control of a polyphase motor 2 (hereinafter also referred to as "motor 2"). As shown in FIG. 1 , the motor system 1 may additionally include a transmission 50 . In this disclosure, transmission 50 is a speed reducer. A basic planetary gear reducer is illustrated in FIG. 1 , which illustratively includes a sun gear 51 , a ring gear 52 , and a planet gear carrier 54 that rotatably supports the pinion gear 53 .

In the present disclosure, the transmission 50 may use any one of the sun gear 51 , the ring gear 52 , and the planet carrier 54 as an input element, and connect the input element to the motor shaft 2 d of the motor 2 . The transmission 50 may use elements other than the input elements as fixed elements and the remaining elements as output elements connected to the load 60 driven by the transmission 50 . As the load 60, a robot arm can be mentioned, for example. The transmission 50 may use a transmission having various structures other than a planetary gear transmission. In addition, as the load 60, any load 60 can be operated by using the transmission 50, and various loads such as automobile wheels and machine tools can be used.

In the present disclosure, the motor system 1 includes a motor 2 and a control driver 3 that electrically controls the motor 2 .

In this disclosure, motor 2 is a three-phase AC motor. The motor 2 includes a stator 2a, a rotor 2b, and a motor housing 2c. The stator 2a and the rotor 2b are accommodated inside the motor housing 2c.

In this disclosure, the motor 2 is a brushless three-phase AC motor with P poles and S slots. The number of poles P and the number of slots S of the motor 2 satisfy the following relational expressions (1) and (2).

P=3n±1 (n: positive odd number except 1)…(1) S=3n (n: positive odd number except 1)…(2)

Here, "S" is the number of coils of the entire motor 2, and "n" refers to the number of teeth for each phase (hereinafter also referred to as "the number of teeth"). In this disclosure, the number of poles P is P=8, and the number of slots S is S=9. In addition, the number of teeth n in each phase is n=3. Motors that meet the above conditions (1) and (2) are also called Series II motors. The motor 2 of this embodiment is an 8P9S brushless three-phase AC motor.

In this disclosure, the control driver 3 is also accommodated inside the motor housing 2c. In the present disclosure, the control driver 3 includes a power module 30 for supplying current corresponding to each of the power modules 30 and a power module control unit 40 for controlling the power module 30 .

In FIG. 2 , the motor system 1A according to the first embodiment of the present invention is schematically shown in a cross section including the motor rotation axis O. The cross section of FIG. 2 is shown including an upper and lower arm device group 31 described later.

In this disclosure, motor 2 is an axial gap motor. In the present disclosure, the teeth 22 of the stator 2 a extend in the extending direction of the motor rotation axis O (hereinafter also referred to as the “motor rotation axis direction”).

The stator 2a includes a stator module 20A. The stator module 20A is a stator module in which a coil 24 is wound around a plurality of teeth 22 arranged at intervals in the circumferential direction around the motor rotation axis O.

In the present disclosure, the stator module 20A includes a plurality of teeth 22 arranged at intervals in the circumferential direction around the motor rotation axis O, and a rear core 23 provided with the plurality of teeth 22 . In this disclosure, the rear core 23 is an annular rear core arranged at a position with the motor rotation axis O as the central axis. In the present disclosure, the rear core 23 is formed larger than the teeth 22 . In this disclosure, the rear core 23 functions as a yoke. In addition, in the present disclosure, the teeth 22 and the rear core 23 are integrally formed to form one core block 21 . Therefore, in this disclosure, the core block 21 functions as a yoke as a whole.

In addition, the stator module 20A includes a plurality of coils 24 . In the present disclosure, the coils 24 are respectively wound around one tooth 22 by concentrated winding. In the present disclosure, stator module 20A includes nine teeth 22 . That is, in the present disclosure, the stator module 20A includes nine coils 24 .

In the present disclosure, the number of stator modules 20A may be at least one. In the present disclosure, the stator 2a includes two stator modules 20A. In the present disclosure, two stator modules 20A are arranged at intervals along the motor rotation axis direction.

On the other hand, in the present disclosure, the rotor 2b is disposed adjacent to the stator module 20A in the motor rotation axis direction. In the present disclosure, the rotor 2b is arranged between the two stator modules 20A in the direction of the motor rotation axis.

The rotor 2b includes a rotor body 2b1 fixed to the motor shaft 2d and a plurality of permanent magnets 2b2. In this disclosure, the rotor body 2b1 is an annular rotor body arranged at a position with the motor rotation axis O as the central axis. The plurality of permanent magnets 2b2 are respectively mounted on the rotor body 2b1 at intervals around the motor rotation axis O in the circumferential direction. The plurality of permanent magnets 2b2 are respectively arranged so that the magnetic poles (N, S) of the permanent magnets 2b2 adjacent in the circumferential direction are different. In the present disclosure, the rotor 2b includes eight permanent magnets 2b2. That is, in the present disclosure, the rotor 2 b is a rotor with a pole number of 8 (P=8).

The power module 30 is a power module in which a plurality of corresponding upper and lower arm device groups 31 are respectively mounted on the base member 34 .

In the present disclosure, the power module 30 includes a plurality of upper and lower arm device groups 31 and a base member 34 on which the upper and lower arm device groups 31 are installed.

In the present disclosure, the power module 30 includes three upper and lower arm device groups 31 . The upper and lower arm device group 31 includes an upper arm power supply device (hereinafter, also referred to as "upper arm device") 32 and a lower arm power supply device (hereinafter, also referred to as "lower arm device") 33 . Here, the upper arm device 32 is a switching circuit element for supplying current from the power supply + (positive) side to the coil 24 of the stator module 20A, and the lower arm device 33 is used to supply the coil 24 with current from the power supply - (negative side). ) side current switching circuit element. The switching circuit element can be formed by combining various circuit elements as long as it has a structure that can perform an ON/OFF switching function and a rectifying function. The upper arm device 32 and the lower arm device 33 are electrically connected to the corresponding coils 24 via the wires 5 .

The base member 34 is an annular base member arranged at a position with the motor rotation axis O as the central axis. In the present disclosure, the base member 34 is formed from a base plate of thin plates. In the present disclosure, three upper and lower arm device groups 31 are arranged on the other side of the base member 34 in the direction of the motor rotation axis at intervals in the circumferential direction.

In the present disclosure, the power module 30 further includes a substrate 35 . In the present disclosure, the upper and lower arm device groups 31 are mounted on the substrate 35 . Thereby, the upper and lower arm device groups 31 can be mounted on the base member 34 via the base plate 35 . In the present disclosure, considering the influence of heat transmitted to the upper and lower arm device groups 31 , a ceramic substrate is used as the substrate 35 . The ceramic substrate has a heat insulation function. However, the substrate 35 is not limited to a ceramic substrate. In addition, in the present disclosure, the power module 30 further includes at least one intermediate member 36 between the base member 34 and the substrate 35 . As the intermediate member 36, for example, a member having a thermal insulation function, a magnetic or electrical insulation function can be used. Among them, the intermediate member 36 is an arbitrary member and may be omitted.

In the present disclosure, the upper arm device 32 and the lower arm device 33 are each appropriately controlled on/off by the power module control unit 40 . Therefore, in the present disclosure, the power module 30 can function as a converter circuit for controlling the current supplied by the motor 2 .

The stator module 20A and the power module 30 are arranged in a position aligned along the motor rotation axis direction.

Specifically, in the present disclosure, the stator module 20A and the power module 30 are disposed on the same axis with the motor rotation axis O as a common central axis. Furthermore, in the present disclosure, the stator module 20A is arranged on one side in the direction of the motor rotation axis, and the power module 30 is arranged on the other side in the direction of the motor rotation axis. That is, in this disclosure, the so-called "arranged at a position aligned along the direction of the motor rotation axis" means that the sub-module 20A and the power module 30 are arranged at a position facing each other in the direction of the motor rotation axis with the motor rotation axis O as the central axis. adjacent location.

Furthermore, the stator module 20A is mounted on one side of the base member 34 in the direction of the motor rotation axis. On the other hand, the upper and lower arm device groups 31 of the power module 30 are installed on the other side of the base member 34 in the direction of the motor rotation axis.

In the present disclosure, the stator 2 a includes two stator modules 20A. Among the two stator modules 20A, the stator module 20A arranged on the other side in the direction of the motor rotation axis is installed on the power module 30 . The stator module 20A disposed on the other side in the direction of the motor rotation axis is mounted on one surface of the base member 34 in the power module 30 in the direction of the motor rotation axis. Among them, in addition to being directly installed on the base member 34, the stator module 20A can also be installed indirectly through other components. That is, the stator module 20A may be directly or indirectly mounted on the base member 34 of the power module 30 . Examples of mounting means include bonding means such as adhesives, fastening elements such as screws, and welding.

On the other hand, in the present disclosure, the upper and lower arm device groups 31 are mounted on the other side surface in the motor rotation axis direction of the base member 34 via at least the substrate 35 . Among them, the upper and lower arm device groups 31 can also be directly or indirectly installed on the base member 34. Examples of mounting means include bonding means such as adhesives, fastening elements such as screws, and welding.

As mentioned above, the motor system 1A of the present disclosure integrates the stator module 20A of the motor 2 with the power module 30 by sharing the base member 34 of the power module 30 in addition to the upper and lower arm device groups 31 . 30 base member 34. Thereby, as shown in FIG. 2 , the power module 30 can be disposed adjacent to the stator module 20A in the direction of the motor rotation axis. In addition, by arranging the power module 30 at a position adjacent to the stator module 20A in the motor rotation axis direction, the power module 30 and the stator module 20A can be accommodated inside the motor case 2c. Therefore, as shown in FIG. 2 , the motor system 1A becomes a motor system in which the power supply module 30 is installed inside the motor 2 and thus is miniaturized.

In addition, with the motor system 1A of the present disclosure, the wiring (wire 5) between the stator module 20A and the power module 30 can be shortened compared to the conventional case where the power control unit is arranged outside the multi-phase motor. In addition, as the wiring (conductor wire 5 ) between the stator module 20A and the power supply module 30 is shortened, a motor system becomes highly resistant to external noise. Furthermore, as the wiring (conductor wire 5 ) between the stator module 20A and the power supply module 30 is shortened, miswiring during wiring work can be reduced.

In particular, in the present disclosure, the stator module 20A includes a plurality of phase stator modules 201 divided for each phase in the circumferential direction around the motor rotation axis O. In addition, in the present disclosure, the power module 30 also includes a plurality of phase power modules 301 divided according to each phase along the circumferential direction around the motor rotation axis.

FIG. 3 schematically shows the stator module 20A in the motor system 1A of the present disclosure from one side in the direction of the motor rotation axis.

Referring to FIG. 3 , in the present disclosure, the stator module 20A is divided into three phase stator modules 201 at intervals of 120 degrees with the motor rotation axis O as the center. Specifically, the stator module 20A includes three phase stator modules 201: a U-phase stator module 201U, a V-phase stator module 201V, and a W-phase stator module 201W. In the present disclosure, as shown in FIG. 3 , when viewed from one side of the motor rotation axis direction, the three phase stator modules 201 are centered on the motor rotation axis O and are aligned with the U-phase stator module 201 and the V-phase stator module 201 in a counterclockwise direction with the motor rotation axis O as the center. The module 201V and the W-phase stator module 201W are arranged in sequence.

In addition, in the present disclosure, the three phase stator modules 201 each include n teeth 22 . In this disclosure, n=3. That is, in the present disclosure, one phase stator module 201 includes three teeth 22 . Thus, in the present disclosure, the stator module 20A includes nine teeth 22 as a whole.

In the present disclosure, one coil 24 is centrally wound around one tooth 22 . That is, in the present disclosure, one phase stator module 201 includes three coils 24 . Thus, in the present disclosure, the stator module 20A includes nine coils 24 as a whole. In this disclosure, when one of the winding directions is "+", the coil 24 wound in the + direction is marked with a "+" mark, and when the other winding direction is set to "+", the coil 24 wound in the + direction is marked with "+". In the case of "-", the coil 24 wound in the - direction is marked with a "-" mark.

As shown in Figure 3, the U-phase stator module 201U includes three U-phase teeth 22U. The power module 30 supplies U-phase current to the U-phase coil 24U wound around the U-phase tooth 22U. Among them, in the present disclosure, the U-phase coil 24U includes two types of coils 24U with different winding directions. In the present disclosure, the U-phase stator module 201U includes one U-phase coil 24U+ wound in the + direction, and two U-phase coils 24U- wound in the - direction. In the present disclosure, the U-phase coils 24U+ and the U-phase coils 24U- are alternately arranged in the circumferential direction around the motor rotation axis O.

The V-phase stator module 201V also includes three V-phase teeth 22V. The power module 30 supplies V-phase current to the V-phase coil 24V wound around the V-phase teeth 22V. Among them, in this disclosure, the V-phase coil 24V also includes two types of coils 24V with different winding directions. In the present disclosure, the V-phase stator module 201V also includes one V-phase coil 24V+ wound in the + direction, and two V-phase coils 24V- wound in the - direction. In the present disclosure, the V-phase coils 24V+ and the V-phase coils 24V- are also alternately arranged in the circumferential direction around the motor rotation axis O.

The W-phase stator module 201W also includes three W-phase teeth 22W. The power module 30 supplies W-phase current to the W-phase coil 24W wound around the W-phase teeth 22W. Among them, in this disclosure, the W-phase coil 24W also includes two types of coils 24W with different winding directions. In the present disclosure, the W-phase stator module 201W also includes one W-phase coil 24W+ wound in the + direction, and two W-phase coils 24W- wound in the - direction. In the present disclosure, the W-phase coils 24W+ and the W-phase coils 24W- are also alternately arranged in the circumferential direction around the motor rotation axis O.

The U-phase stator module 201U is schematically shown in FIG. 4 . As shown in FIG. 4 , in the present disclosure, the annular stator module 20A is divided into three phase stator modules 201 at intervals of 120 degrees with the motor rotation axis O as the center. The V-phase stator module 201V and the W-phase stator module 201W only differ in the type of phase current supplied. The structures of the V-phase stator module 201V and the W-phase stator module 201W are the same as the U-phase stator module 201U in Figure 4 same.

In addition, the core block 21 of the stator module 20A is schematically shown in FIG. 5 . FIG. 5 shows the stator module 20A in FIG. 3 without the coil 24 . In the present disclosure, as shown in FIG. 5 , the core block 21 is also divided into three phase core blocks 210 at intervals of 120 degrees with the motor rotation axis O as the center. Specifically, the core block 21 includes three phase core blocks 210: a U-phase core block 210U, a V-phase core block 210V, and a W-phase core block 210W.

The U-phase core block 210U is schematically shown in FIG. 6 . FIG. 6 shows the state after removing the U-phase coil 24U from the U-phase stator module 201U of FIG. 4 . As shown in FIG. 6 , in the present disclosure, the core block 21 is divided into three phase core blocks 210 at intervals of 120 degrees with the motor rotation axis O as the center. The V-phase core block 210V and the W-phase core block 210W differ only in the type of the wound phase coil. The structures of the V-phase core block 210V and the W-phase core block 210W are the same as the U-phase core block 210U in FIG. 6 .

In FIG. 7 , the power module 30 in the motor system 1A of the present disclosure is schematically shown from the other side in the direction of the motor rotation axis.

Referring to FIG. 7 , in the present disclosure, the power module 30 is divided into three phase power modules 301 at intervals of 120 degrees with the motor rotation axis O as the center. Specifically, the power module 30 includes three phase power modules 301: a U-phase power module 301U, a V-phase power module 301V, and a W-phase power module 301W. In this disclosure, as shown in Figure 7, when viewed from the other side in the direction of the motor rotation axis, the three-phase power module 301 is centered on the motor rotation axis O and clockwise follows the U-phase power module 301U and the V-phase power module 301. The order of module 301V and W-phase power module 301W.

The U-phase power module 301U includes a U-phase upper and lower arm device group 31U. The U-phase upper and lower arm device group 31U includes a U-phase upper arm device 32U and a U-phase lower arm device 33U. The U-phase upper arm device 32U supplies the U-phase current from the + side of the power supply to the U-phase coil 24U of the U-phase stator module 201U via the wire 5U. The U-phase lower arm device 33U supplies the U-phase current from the power supply side to the U-phase coil 24U via the wire 5U. Furthermore, in this disclosure, the U-phase connector 37U3 is provided in the U-phase power module 301U.

The V-phase power module 301V includes a V-phase upper and lower arm device group 31V. The V-phase upper and lower arm device group 31V includes a V-phase upper arm device 32V and a V-phase lower arm device 33V. The V-phase upper arm device 32V supplies the U-phase current from the + side of the power supply to the V-phase coil 24V of the V-phase stator module 201V via the wire 5V. The V-phase lower arm device 33V supplies the V-phase current from the power supply side to the V-phase coil 24V via the wire 5V. Furthermore, in this disclosure, the V-phase power module 301V is provided with the V-phase connector 37V3.

The W-phase power module 301W includes a W-phase upper and lower arm device group 31W. The W-phase upper and lower arm device group 31W includes a W-phase upper arm device 32W and a W-phase lower arm device 33W. The W-phase upper arm device 32W supplies the U-phase current from the + side of the power supply to the W-phase coil 24W of the W-phase stator module 201W via the wire 5W. The W-phase lower arm device 33W supplies the W-phase current from the power supply side to the W-phase coil 24W via the wire 5W. Furthermore, in this disclosure, the W-phase power module 301W is provided with the W-phase connector 37W3.

In addition, in the present disclosure, the power module 30 can also be divided into three phase power modules 301 at intervals of 120 degrees centered on the motor rotation axis O. Specifically, the three-phase power module 301 can be divided into a U-phase base member 34U and a V-phase base member 34V by dividing the annular base member 34 at intervals of 120 degrees with the motor rotation axis O as the center. The W-phase base member 34 is formed from these three phase base members. In the case of the present disclosure, as shown in FIG. 7 , when viewed from the other side in the direction of the motor rotation axis, the three phase base members 34U to 34W follow the U-phase base member 34U clockwise with the motor rotation axis O as the center. , the V-phase base member 34V, and the W-phase base member 34W are arranged in this order.

The U-phase power module 301U is schematically shown in FIG. 8 . The V-phase power module 301V and the W-phase power module 301W only have different types of corresponding phase coils. The structures of the V-phase power module 301V and the W-phase power module 301W are the same as the U-phase power module 301U in Figure 8 same.

As shown in FIG. 3 , a stator module 20A is composed of a plurality of phase stator modules 201 divided for each phase in the circumferential direction around the motor rotation axis O, and as shown in FIG. By configuring the power supply module 30 into a plurality of phase power supply modules 301 divided for each phase, the coil 24 and the upper and lower arm device groups 31 can be easily associated with each phase. Thereby, in the present disclosure, the wire 5 connecting the coil 24 of one phase stator module 201 and the upper and lower arm device groups 31 corresponding to the coil 24 can be easily wired for each phase. As a specific example, the wires 5U connecting the phase coils (24U-, 24U+, 24U-) of the U-phase stator module 201U and the U-phase upper and lower arm device groups 31U can be easily wired as a U-phase group. In addition, by configuring the stator module 20A and the power module 30 for each phase, maintenance of each phase becomes easy.

In particular, as is clear from FIGS. 3 and 7 , in the present disclosure, when viewed from the direction of the motor rotation axis, one phase stator module 201 and a phase power module corresponding to the one phase stator module 201 301 are arranged at positions aligned with each other in the circumferential direction around the motor rotation axis O.

In this disclosure, the term "arranged at a position aligned with each other in the circumferential direction about the motor rotation axis O when viewed from the direction of the motor rotation axis" means that the sub-module 20A and the power module 30 are arranged at a position corresponding to the motor rotation axis. O is the position where the central axes are adjacent to each other in the direction of the motor rotation axis, and when viewed from the direction of the motor rotation axis, one phase stator module 201 and the phase power module 301 corresponding to the one phase stator module 201 are configured at a position that overlaps in the circumferential direction about the motor rotation axis O. In this case, one phase stator module 201 and the upper and lower arm device groups 31 corresponding to the one phase stator module 201 are arranged substantially directly behind each other with the base member 34 interposed therebetween in the circumferential direction around the motor rotation axis O. s position. As a specific example, as shown in FIG. 9 , the U-phase stator module 201U and the U-phase upper and lower arm device group 31U are arranged substantially directly behind each other across the base member 34 in the circumferential direction around the motor rotation axis O.

When viewed from the direction of the motor rotation axis, one phase stator module 201 and the phase power supply module 301 corresponding to the one phase stator module 201 are arranged at positions aligned with each other in the circumferential direction around the motor rotation axis O. , the wiring (wire 5) between the phase stator module 201 and the upper and lower arm device groups 31 corresponding to the one phase stator module 201 can be minimized. In addition, since the wiring (conducting wire 5 ) is minimized, the motor system becomes more resistant to external noise. Furthermore, as the wiring (conductive wire 5 ) becomes shorter, miswiring during wiring work can be further reduced.

In addition, as described above, the stator module 20A can be divided for each phase. Specifically, as described above, the stator module 20A can be circumferentially divided into a plurality of phase stator modules 201 around the motor rotation axis O. In this case, when the phase stator modules 201 corresponding to each phase are laid out in the stator module 20A, the layout regarding the arrangement of the phase stator modules 201 can be freely changed. In addition, maintenance of each phase becomes easier in this case.

Similarly, as mentioned above, the power module 30 can also be divided according to each phase. Specifically, as mentioned above, the power module 30 can also be divided into a plurality of phase power modules 301 along the circumferential direction around the motor rotation axis O. In this case, when the upper and lower arm device groups 31 corresponding to each phase are laid out in the power module 30 , the layout related to the arrangement of the upper and lower arm device groups 31 can be freely changed. In addition, maintenance of each phase becomes easier in this case.

As a specific example of dividing at least one of the stator module 20A and the power module 30, as shown in FIG. 10, by dividing three divided U-phase stator modules 201U with the same three divided By combining the U-phase power supply modules 301U, the phase stator module 201 and the phase power supply module 301 of the same phase can be easily arranged at a position substantially directly behind each other with the base member 34 interposed therebetween.

2 , in the present disclosure, the power module control unit 40 is disposed on the opposite side to the stator module 20A across the power module 30 in the motor rotation axis direction (the motor rotation axis in the present disclosure). the other side of the axis).

In the present disclosure, the power module control unit 40 is disposed inside the motor housing 2c on the other side closest to the motor rotation axis direction. The power module control unit 40 includes control hardware 41 such as a microcomputer and a Field-Programmable Gate Array (FPGA). In the present disclosure, the power module control part 40 includes, in addition to the control hardware 41, a printed circuit board 42 on which the control hardware 41 is mounted. In addition, in the present disclosure, the power module control part 40 is connected to the power module 30 through the communication cable 37 .

When the power module control unit 40 is disposed at a position on the other side in the motor rotation axis direction across the power module 30 in the motor rotation axis direction, as shown in FIG. 2 , the power module control unit 40 can It is arranged adjacent to the power module 30 in the direction of the motor rotation axis. Thereby, as shown in FIG. 2 , the power module control unit 40 can also be accommodated inside the motor housing 2c. Therefore, as shown in FIG. 2 , the motor system 1A is a motor system in which further miniaturization is achieved by incorporating the power module control unit 40 inside the motor 2 .

In addition, when the power module control unit 40 is disposed at a position on the other side in the motor rotation axis direction across the power module 30 in the motor rotation axis direction, the power module 30 and the power module control unit can be shortened. wiring between parts 40 (communication cable 37). In addition, as the wiring (communication cable 37 ) is shortened, a motor system becomes more resistant to external noise. Furthermore, as the wiring (communication cable 37 ) is shortened, miswiring during wiring work can be reduced.

In FIG. 11 , the power module control unit 40 is schematically shown from one side in the direction of the motor rotation axis.

In the present disclosure, the power module control unit 40 includes a plurality of control hardware 41 and a ring-shaped printed circuit board 42 on which the control hardware 41 is mounted. In this disclosure, the control hardware 41 includes, for example, a microcomputer 41a and an FPGA 41b.

Furthermore, in this disclosure, in the power supply module control unit 40, the U-phase connector 37U4, the V-phase connector 37V4, and the W-phase connector 37W4 are provided on the printed circuit board 42. One terminal of the U-phase communication cable 37 is connected to the U-phase connector 37W3 of the U-phase power module 301U in Figure 7 , and the other terminal of the U-phase communication cable 37 is connected to the U-phase connector 37U4 of Figure 11 . Similarly, one terminal of the V-phase communication cable 37 is connected to the V-phase connector 37V3 of the V-phase power module 301V in FIG. 7 , and the other terminal of the V-phase communication cable 37 is connected to the V-phase in FIG. 11 Connector 37V4. One terminal of the W-phase communication cable 37 is connected to the W-phase connector 37W3 of the W-phase power module 301W in FIG. 7 , and the other terminal of the W-phase communication cable 37 is connected to the W-phase connector 37W4 of FIG. 11 .

In particular, as is clear from FIGS. 7 and 11 , in the present disclosure, between the U-phase connector 37U3 , V-phase connector 37V3 , and W-phase connector 37W3 of the power module 30 and the power module control unit 40 When the U-phase connector 37U4, the V-phase connector 37V4, and the W-phase connector 37W4 face each other in the direction of the motor rotation axis, they are arranged at positions aligned with each other in the circumferential direction around the motor rotation axis O. In this case, the phase connector of the power module and the phase connector of the power module control unit are arranged at positions substantially facing each other in the circumferential direction around the motor rotation axis O. In this case, the wiring (communication cable 37 ) between the power module 30 and the power module control unit 40 can be minimized. In addition, the wiring between the power module 30 and the power module control unit 40 is the shortest, so the motor system becomes more tolerant to external noise. Furthermore, as the wiring between the power module 30 and the power module control unit 40 becomes shorter, miswiring during wiring work can be further reduced.

FIG. 12 schematically shows the basic circuit configuration included in the motor system 1A and the relationship between the stator module 20A, the power supply module 30 and the power supply module control unit 40 in the motor system 1A.

As shown in FIG. 12 , in the present disclosure, the basic structure of the drive circuit for driving the motor 2 includes a converter circuit, which is composed of a U-phase upper and lower arm device group 31U, a V-phase upper and lower arm device group 31V and W phase upper and lower arm device groups 31W are formed from these three upper and lower arm device groups 31. In the present disclosure, the upper arm and the lower arm of the converter circuit are respectively controlled by gate driving signals from the power module control unit 40 . In the present disclosure, the rotational position of the motor shaft 2d of the motor 2 is fed back to the power module control part 40 through a Hall integrated circuit (IC) signal or an encoder signal.

The power source connected to the converter circuit may use a DC power source or an AC power source. That is, the drive circuit for driving the motor 2 can use a DC converter (Direct Current/Alternating Current, DC/AC converter), an AC converter (Alternating Current/Alternating Current, AC/AC) converter).

As described above, in the present disclosure, the motor 2 is a brushless three-phase AC motor having the number of poles P and the number of slots S. The number of poles P and the number of slots S of the motor 2 satisfy the following relational expressions (1) and (2).

P=3n±1 (n: positive odd number except 1)…(1) S=3n (n: positive odd number except 1)…(2)

Brushless three-phase AC motors that satisfy the conditions (1) and (2) above belong to a type called "Series II". Series II brushless three-phase AC motors can be divided into three phases: U phase, V phase, and W phase respectively around the motor rotation axis O along the circumferential direction within a range of 120 degrees. In this case, when the phase stator modules 201 corresponding to each of the U phase, V phase, and W phase are laid out in the stator module 20A, it is not necessary to configure two or more phase stator modules 201 to correspond to the U phase. Any one of the phases, the V phase, and the W phase can be corresponded by configuring only one phase stator module 201 . Thereby, the phase stator module 201 corresponding to each of the U phase, V phase, and W phase can be easily laid out in the stator module 20A. In addition, the Series II brushless three-phase AC motor can be configured with an odd number of phase slots (phase coils) in each of the U-phase, V-phase, and W-phase.

As described above, the motor 2 of the present disclosure is the 8P9S brushless three-phase AC motor, which is a representative example of Series II.

FIG. 13 schematically shows the rotor 2 b based on the period (one rotation period) Tm until the rotor 2 b (motor shaft 2 d) of the motor 2 in the motor system 1A rotates once in the circumferential direction around the motor rotation axis O. The relationship between the arrangement of the magnetic poles (N, S) and the arrangement of the coils 24 (teeth 22) of the stator module 20A and each phase power supply module 301. In addition, in FIG. 13 , the symbol “U”, the symbol “V” and the symbol “W” respectively represent the coil 24 (teeth 22 ) of each phase, and the symbol “+” and the symbol “-” represent the windings of the coil 24 as mentioned above. around direction. 14 schematically shows the relationship between the arrangement of the magnetic poles (N, S) of the rotor 2 b and the arrangement of the phase stator modules 201 at positions in the circumferential direction about the motor rotation axis O in the motor system 1A.

Referring to FIGS. 13 and 14 , it can be seen that in the present disclosure, when the phase stator module 201 corresponding to each of the U phase, V phase, and W phase is laid out in the stator module 20A, there is no need to configure two The above phase stator module 201 corresponds to any one of U phase, V phase, and W phase, and can be corresponding by configuring only one phase stator module 201 .

That is, in the present disclosure, the stator module 20A includes a plurality of phase stator modules 201 divided for each phase in the circumferential direction around the motor rotation axis O, upper and lower arm device groups 31 corresponding to each phase and corresponding phase components. The stator modules 201 form a pair.

Specifically, in the U phase, the U phase upper and lower arm device group 31U and the corresponding U phase stator module 201U form a pair. In addition, in the V phase, the V phase upper and lower arm device groups 31V and the corresponding V phase stator modules 201V form a pair. Furthermore, in the W phase, the W-phase upper and lower arm device groups 31W and the corresponding W-phase stator module 201W form a pair.

As shown in this disclosure, if the upper and lower arm device groups 31 corresponding to each phase and the corresponding phase stator module 201 are set as a pair, then as described above, the phase stator module 201 and the one phase stator can be The wiring (wire 5) between the upper and lower arm device groups 31 corresponding to the module 201 is the shortest. In addition, since the wiring (conducting wire 5 ) is minimized, the motor system becomes more resistant to external noise. Furthermore, as the wiring (conductive wire 5 ) becomes shorter, miswiring during wiring work can be further reduced.

Among them, the motor 2 can be a brushless three-phase AC motor whose pole number P and slot number S satisfy the following relationships (3) and (4). The brushless three-phase AC motor belongs to a category called "Series III". Representative examples of Series III include the 10P12S (n=2) brushless three-phase AC motor.

P=6n±2 (n: even number)…(3) S=6n (n: even number)…(4)

In addition, the motor 2 can be a brushless three-phase AC motor whose pole number P and slot number S satisfy the relationship P:S=4:3. The brushless three-phase AC motor belongs to a category called "Series I". Representative examples of Series I include the 6P9S brushless three-phase AC motor.

Next, FIG. 15 schematically shows the motor system 1B according to the second embodiment of the present invention in a cross section including the motor rotation axis O.

In this disclosure, motor 2 is a radial gap motor. In the present disclosure, the teeth 27 of the stator 2a extend in a direction orthogonal to the motor rotation axis direction (hereinafter also referred to as "motor radial direction").

In the present disclosure, the stator 2a includes a stator module 20B. Like the motor system 1A, the stator module 20B is a stator module in which a coil 24 is wound around a plurality of teeth 27 arranged at intervals in the circumferential direction around the motor rotation axis O.

In the present disclosure, the stator module 20B includes a plurality of teeth 27 arranged at intervals in the circumferential direction around the motor rotation axis O, and an annular core 28 provided with the plurality of teeth 27 . In this disclosure, the annular core 28 is an annular annular core arranged at a position with the motor rotation axis O as the central axis. In the present disclosure, the ring core 28 includes an outer ring core 28a and an inner ring core 28b. In the present disclosure, the teeth 27 are arranged between the outer annular core 28a and the inner annular core 28b, and are combined with the outer annular core 28a and the inner annular core 28b respectively. In addition, in this disclosure, the teeth 27 and the annular core 28 are integrally formed, forming one core block 21 in the same manner as the stator module 20A. Therefore, in this disclosure, the core block 21 also functions as a yoke as a whole.

In addition, in this disclosure, the coils 24 are respectively wound around one tooth 27 through concentrated winding. In the present disclosure, the stator module 20B also includes nine teeth 27 like the stator module 20A. That is, in the present disclosure, the stator module 20B also includes nine coils 24 like the stator module 20A.

On the other hand, in the present disclosure, the rotor 2b is disposed adjacent to the stator module 20A in the motor rotation axis direction. In the present disclosure, the rotor 2b is disposed closer to one side of the motor rotation axis direction than the stator module 20B. Among them, in the present disclosure, the rotor body 2b1 is formed in a manner to surround the stator module 20B in the circumferential direction from the radial outer side around the motor rotation axis O.

In this disclosure, the rotor body 2b1 is a bottomed cylindrical rotor body arranged at a position with the motor rotation axis O as the central axis. The rotor body 2b1 includes a cylindrical body part 2b11 and a bottom part 2b12 closing one end of the cylindrical body part 2b11. The plurality of permanent magnets 2b2 are respectively mounted on the inner peripheral surface of the cylindrical body portion 2b11 at intervals around the motor rotation axis O in the circumferential direction. The plurality of permanent magnets 2b2 are respectively arranged so that the magnetic poles (N, S) of adjacent permanent magnets 2b2 in the circumferential direction are different. In the present disclosure, the rotor 2b includes eight permanent magnets 2b2 like the motor system 1A. That is, in this disclosure, the rotor 2b is also a rotor with a pole number of 8 (P=8).

In the present disclosure, the power module 30 also includes a plurality of upper and lower arm device groups 31 and a base member 34 on which the upper and lower arm device groups 31 are installed. In the present disclosure, the power module 30 also includes three upper and lower arm device groups 31 . Among them, in the present disclosure, the base member 34 is different from the motor system 1A.

In the present disclosure, the base member 34 includes an annular plate portion 34a, and a cylindrical portion 34b connected to the annular plate portion 34a. In the present disclosure, the cylindrical portion 34b protrudes from one surface of the annular plate portion 34a in the motor rotation axis direction. In the present disclosure, the base member 34 is disposed at a position with the motor rotation axis O as the central axis. In the present disclosure, the annular plate portion 34a is formed of a thin plate. In the present disclosure, the three upper and lower arm device groups 31 are arranged at intervals in the circumferential direction around the motor rotation axis O on the other side of the annular plate portion 34 a in the motor rotation axis direction.

In the present disclosure, the stator module 20B and the power module 30 are also arranged in a position aligned in the direction of the motor rotation axis.

Specifically, in the present disclosure, the stator module 20B and the power module 30 are also disposed on the same axis with the motor rotation axis O as a common central axis. Furthermore, in the present disclosure, the stator module 20B is also disposed on one side of the motor rotation axis direction, and the power module 30 is also disposed on the other side of the motor rotation axis direction. That is, in this disclosure, the so-called "arranged at a position aligned in the direction of the motor rotation axis" means that the sub-module 20B and the power module 30 are arranged so as to be mutually aligned in the direction of the motor rotation axis with the motor rotation axis O as the central axis. adjacent location.

Furthermore, the stator module 20B is also mounted on one side of the base member 34 in the motor rotation axis direction, similarly to the motor system 1A. Among them, in the present disclosure, the stator module 20B is mounted on the outer peripheral surface of the cylindrical portion 34b of the base member 34. On the other hand, the upper and lower arm device groups 31 of the power module 30 are also installed on the other side of the base member 34 in the direction of the motor rotation axis. In this disclosure, the upper and lower arm device groups 31 are mounted on the other side surface of the annular plate portion 34 a of the base member 34 in the direction of the motor rotation axis.

The motor system 1B of the present disclosure also integrates the stator module 20B of the motor 2 with the base of the power module 30 by sharing the base member 34 of the power module 30 in addition to the upper and lower arm device groups 31 . Component 34. Thereby, as shown in FIG. 15 , the power module 30 can be disposed adjacent to the stator module 20A in the direction of the motor rotation axis. In addition, by arranging the power module 30 at a position adjacent to the stator module 20B in the motor rotation axis direction, the power module 30 and the stator module 20B can be accommodated inside the motor housing 2c. Therefore, as shown in FIG. 15 , the motor system 1B is also a motor system that is miniaturized by installing the power module 30 inside the motor 2 .

In addition, with the motor system 1B of the present disclosure, the wiring (wire 5) between the stator module 20B and the power module 30 can also be shortened compared to the conventional case where the power control unit is arranged outside the multi-phase motor. In addition, as the wiring (lead wire 5 ) between the stator module 20B and the power supply module 30 becomes shorter, a motor system becomes more resistant to external noise. Furthermore, as the wiring (conductor wire 5 ) between the stator module 20B and the power supply module 30 is shortened, miswiring during wiring work can be reduced.

In FIG. 16 , the stator module 20 provided in the motor system 1B is schematically shown from one side in the direction of the motor rotation axis in a state of being mounted on the base member 34 .

Referring to FIG. 16 , in the present disclosure, the stator module 20B also includes a plurality of phase stator modules 201 divided for each phase in the circumferential direction around the motor rotation axis O. In addition, in the present disclosure, the power module 30 also includes a plurality of phase power modules 301 divided into each phase along the circumferential direction around the motor rotation axis.

Referring to FIG. 16 , in this disclosure, the stator module 20B is also divided into three phase stator modules 201 at intervals of 120 degrees with the motor rotation axis O as the center. In this disclosure, as shown in Figure 16, when viewed from one side of the motor rotation axis direction, the three phase stator modules 201 also follow the U-phase and V-phase stator modules 201 counterclockwise with the motor rotation axis O as the center. The stator module 201V and the W-phase stator module 201W are arranged in sequence.

In addition, one phase stator module 201 among the plurality of phase stator modules 201 forming the stator module 20B provided in the motor system 1B is schematically shown in FIG. 17 from one side in the motor rotation axis direction.

The U-phase stator module 201U is schematically shown in FIG. 17 . As shown in FIG. 17 , in the present disclosure, the annular stator module 20B can also be divided into three phase stator modules 201 at intervals of 120 degrees with the motor rotation axis O as the center. In this disclosure, the V-phase stator module 201V and the W-phase stator module 201W differ only in the type of phase current supplied. The structures of the V-phase stator module 201V and the W-phase stator module 201W are the same as those of U in FIG. 17 The phase stator module 201U is the same.

Furthermore, the phase core block 210 forming the phase stator module 201 of FIG. 17 is schematically shown in FIG. 18 from the direction of the motor rotation axis. FIG. 18 shows the U-phase stator module 201U in FIG. 17 without the U-phase coil 24U.

In the present disclosure, the core block 21 is also divided into three phase core blocks 210 at intervals of 120 degrees with the motor rotation axis O as the center. Specifically, in the present disclosure, the core block 21 also includes three phase core blocks 210 including a U-phase core block 210U, a V-phase core block 210V, and a W-phase core block 210W.

As shown in FIG. 18 , in the present disclosure, the core block 21 is divided into three phase core blocks 210 at intervals of 120 degrees with the motor rotation axis O as the center. The V-phase core block 210V and the W-phase core block 210W differ only in the type of the phase coil wound thereon. The structures of the V-phase core block 210V and the W-phase core block 210W are the same as the U-phase core block 210U in FIG. 18 .

In addition, in the present disclosure, the power module 30 also has three upper and lower arm device groups 31. When viewed from the other side in the direction of the motor rotation axis, the three upper and lower arm device groups 31 are respectively configured by the same device as in FIG. 7 The other side surface in the direction of the motor rotation axis of the annular plate portion 34 a is arranged and mounted on the base member 34 .

Therefore, as shown in FIG. 16 , if the stator module 20B is composed of a plurality of phase stator modules 201 divided for each phase in the circumferential direction around the motor rotation axis O, and as shown in FIG. 7 , If a plurality of phase power supply modules 301 divided for each phase in the circumferential direction constitute the power supply module 30, the coil 24 and the upper and lower arm device groups 31 can be easily associated with each phase, similar to the motor system 1A. . Thereby, in the present disclosure, the wire 5 connecting the coil 24 of one phase stator module 201 and the upper and lower arm device groups 31 corresponding to the coil 24 can be easily wired for each phase. As a specific example, the wires 5U connecting the phase coils (24U-, 24U+, 24U-) of the U-phase stator module 201U and the U-phase upper and lower arm device groups 31U can be easily wired as a U-phase group. In addition, in the present disclosure, by configuring the stator module 20B and the power module 30 for each phase, maintenance of each phase also becomes easy.

In particular, as is clear from FIGS. 16 and 7 , in the present disclosure, one phase stator module 201 and the phase power module 301 corresponding to the one phase stator module 201 are the same as the motor system 1A. When viewed from the direction of the motor rotation axis, they are arranged at positions aligned with each other in the circumferential direction around the motor rotation axis O. In this disclosure, the so-called "arranged at a position aligned with each other in the circumferential direction about the motor rotation axis O when viewed from the direction of the motor rotation axis" also refers to the designation that the sub-module 20B and the power module 30 are arranged at a position where the motor rotates. The axis O is the position where the central axes are adjacent to each other in the direction of the motor rotation axis, and when viewed from the direction of the motor rotation axis, one phase stator module 201 and the phase power module 301 corresponding to the one phase stator module 201 They are arranged in positions overlapping in the circumferential direction around the motor rotation axis O. In this case, in the present disclosure, similarly to the motor system 1A, one phase stator module 201 and the upper and lower arm device groups 31 corresponding to the one phase stator module 201 are arranged around the motor rotation axis O. The base members 34 are located substantially directly behind each other in the circumferential direction. As a specific example, as shown in FIG. 19 , the U-phase stator module 201U and the U-phase upper and lower arm device group 31U are arranged substantially at a distance from each other across the annular plate portion 34 a of the base member 34 in the circumferential direction around the motor rotation axis O. The position directly behind. In this case, the wiring (wire 5) between the phase stator module 201 and the upper and lower arm device groups 31 corresponding to the one phase stator module 201 can be minimized. In addition, since the wiring (conducting wire 5 ) is minimized, the motor system becomes more resistant to external noise. Furthermore, as the wiring (conductive wire 5 ) becomes shorter, miswiring during wiring work can be further reduced.

In addition, as mentioned above, the stator module 20B may be divided for each phase as shown in FIG. 17 . In this case, similarly to the motor system 1A, when the phase stator modules 201 corresponding to each phase are laid out in the stator module 20A, the layout regarding the arrangement of the phase stator modules 201 can be freely changed. Furthermore, in this case, maintenance of each phase also becomes easier in the present disclosure.

Similarly, as mentioned above, the power module 30 can also be divided according to each phase. Specifically, as mentioned above, the power module 30 can also be divided into a plurality of phase power modules 301 along the circumferential direction around the motor rotation axis O. In this case, similarly to the motor system 1A, when the upper and lower arm device groups 31 corresponding to each phase are laid out in the power supply module 30 , the layout regarding the arrangement of the upper and lower arm device groups 31 can be freely changed. Furthermore, in this case, maintenance of each phase also becomes easier in the present disclosure.

As a specific example of dividing at least one of the stator module 20B and the power module 30, as shown in FIG. 19, by dividing three divided U-phase stator modules 201U with the same three divided By combining the U-phase power supply modules 301U, the phase stator module 201 and the phase power supply module 301 of the same phase can be easily arranged at positions substantially directly behind each other across the annular plate portion 34a of the base member 34.

Furthermore, in this disclosure, the power module control unit 40 also has the same structure as FIG. 11 . Therefore, as shown in FIG. 15 , the motor system 1B is also a motor system in which further miniaturization is achieved by installing the power module control unit 40 inside the motor 2 . In this disclosure, similarly to the motor system 1A, the wiring (communication cable 37 ) between the power module 30 and the power module control unit 40 may be shortened. In addition, in the present disclosure, as the wiring (communication cable 37 ) is shortened, a motor system becomes more resistant to external noise. Furthermore, in this disclosure, as the wiring (communication cable 37 ) is shortened, miswiring during wiring work can also be reduced.

The motor 2 of the present disclosure is also a brushless three-phase AC motor with the number of poles P and the number of slots S. The number of poles P and the number of slots S of the motor 2 satisfy the following relational expressions (1) and (2).

P=3n±1 (n: positive odd number except 1)…(1) S=3n (n: positive odd number except 1)…(2)

That is, the motor 2 of the present disclosure is also a series II brushless three-phase AC motor. Therefore, in the present disclosure, as mentioned above, each of the three phases of U phase, V phase, and W phase can also be divided within a range of 120 degrees in the circumferential direction around the motor rotation axis O. Therefore, in the motor system 1B of the present disclosure, similarly to the motor system 1A, when the phase stator module 201 corresponding to each of the U phase, V phase, and W phase is laid out in the stator module 20A, there is no need to configure two The above phase stator module 201 corresponds to any one of U phase, V phase, and W phase, and can be corresponding by configuring only one phase stator module 201 . Thereby, the motor system 1B of the present disclosure can also easily lay out the phase stator module 201 corresponding to each of the U phase, V phase, and W phase in the stator module 20A. In addition, in the motor system 1B of the present disclosure, the series II brushless three-phase AC motor can also be configured with an odd number of phase slots (phase coils) in the three phases of U phase, V phase, and W phase.

As mentioned above, the motor 2 of the present disclosure is also a representative example of Series II, that is, the 8P9S brushless three-phase AC motor.

Therefore, as shown in FIGS. 13 and 14 , when the phase stator module 201 corresponding to each of the U phase, V phase, and W phase is laid out in the stator module 20A, the motor 2 of the present disclosure does not need to be configured by two More than one phase stator module 201 can be configured to correspond to any one of U phase, V phase, and W phase by configuring only one phase stator module 201 .

That is, the motor system 1B of the present disclosure is also similar to the motor system 1A. The stator module 20A includes a plurality of phase stator modules 201 divided for each phase in the circumferential direction around the motor rotation axis O. The upper and lower stator modules 201 correspond to each phase. The arm device group 31 and its corresponding phase stator module 201 form a pair.

Therefore, as mentioned above, the motor system 1B of the present disclosure can also set the upper and lower arm device groups 31 corresponding to each phase and the corresponding phase stator module 201 as a pair, so that the phase stator module 201 and the corresponding phase stator module 201 can be configured as a pair. The wiring (wire 5) between the upper and lower arm device groups 31 corresponding to one phase stator module 201 is the shortest. In addition, since the wiring (conducting wire 5 ) is minimized, the motor system becomes more resistant to external noise. Furthermore, as the wiring (conductive wire 5 ) becomes shorter, miswiring during wiring work can be further reduced.

In addition, in each of the above embodiments, the coil 24 may be wound around the plurality of teeth 22 ( 27 ) by distributed winding.

FIG. 20 schematically shows a state in which the coil 24 is wound around the teeth 22 ( 27 ) using distributed winding.

As shown in Figure 20, distributed winding is where the coil 24 is wound across multiple teeth 22 (28). The distributed winding may be used in each of the embodiments described.

The above description only shows exemplary embodiments of the present invention, and various changes can be made depending on the scope of the claims. For example, the structures, functions, etc. included in each of the above-described embodiments can be rearranged so that they are not logically inconsistent. In addition, the structures or functions included in one embodiment can be combined and used in other embodiments, and multiple structures or functions can be combined into one, divided, or a part of them can be omitted.

1: Motor system (basic structure) 1A: Motor system (first embodiment) 1B: Motor system (second embodiment) 2: Motor (polyphase motor) 2a:Stator 2b:Rotor 2b1: Rotor body 2b2:Permanent magnet 2b11: Cylindrical body part 2b12: Bottom 2c: Motor housing 2d: motor shaft 3:Control driver 5: Wire 5U, 5V, 5W: wires 20A: Stator module/module (first embodiment) 20B: Stator module/module (second embodiment) 21: Iron core block 22, 27: Teeth 22U:U phase tooth 23:Rear iron core 24: coil 24U, 24U-, 24U+: U phase coil (phase coil) 24V-, 24V+: V phase coil 24W-, 24W+: W phase coil 28: Ring core 28a: Outer ring core 28b: Inner ring core 30:Power module 31: Upper and lower arm device group 31U:U phase upper and lower arm device set 31V: V phase upper and lower arm device set 31W: W phase upper and lower arm device set 32: Upper arm power device (upper arm device) 32U:U phase upper arm device 32V: V-phase upper arm device 32W: W phase upper arm device 33: Lower arm power device (lower arm device) 33U:U phase lower arm device 33V: V phase lower arm device 33W: W phase lower arm device 34:Base component 34a: Ring plate part 34b: Cylindrical part 34U: U phase base component (phase base component) 34V: V phase base component (phase base component) 34W: W phase base component (phase base component) 35:Substrate 36: Intermediate components 37:Communication cable 37U3, 37U4: U phase connector 37V3, 37V4: V phase connector 37W3, 37W4: W phase connector 40:Power module control department 41:Control hardware 41a:Microcomputer 41b:FPGA 42:Printed substrate 50:Transmission 51:Sun gear 52: Ring gear 53:Pinion gear 54:Planetary gear carrier 60:Load 201:Phase stator module 201U:U phase stator module 201V:V phase stator module 201W:W phase stator module 210:Phase core block 210U: U phase core block 210V: V phase core block 210W: W phase core block 301: Phase power module 301U:U phase power module 301V: V phase power module 301W: W phase power module O: Motor rotation axis

FIG. 1 is a diagram schematically showing an example of a control device system to which the motor system of the present invention can be applied. FIG. 2 is a diagram schematically showing the motor system according to the first embodiment of the present invention in a cross section including the motor rotation axis. FIG. 3 is a diagram schematically showing a stator module provided in the motor system of FIG. 2 from one side in the direction of the motor rotation axis. 4 is a diagram schematically showing one of the plurality of phase stator modules forming the stator module of FIG. 3 from one side in the direction of the motor rotation axis. FIG. 5 schematically shows the core block forming the stator module of FIG. 3 from one side in the direction of the motor rotation axis. FIG. 6 is a diagram schematically showing one of the plurality of phase core blocks forming the core block of FIG. 5 from one side in the direction of the motor rotation axis. FIG. 7 is a diagram schematically showing a power module provided in the motor system of FIG. 2 from the other side in the direction of the motor rotation axis. FIG. 8 is a diagram schematically showing one phase power module among the plurality of phase power modules forming the power module of FIG. 7 from the other side in the direction of the motor rotation axis. FIG. 9 is an enlarged view showing the relationship between the stator module, the power module, and the base member in the motor system of FIG. 2 . FIG. 10 is an enlarged view showing yet another relationship between the stator module, the power module, and the base member in the motor system of FIG. 2 . FIG. 11 is a diagram schematically showing the power module control driver provided in the motor system of FIG. 2 from one side in the direction of the motor rotation axis. FIG. 12 is a diagram schematically showing the relationship between the basic circuit configuration included in the motor system of FIG. 2 and the stator module, the power supply module, and the power supply module control unit. 13 schematically shows the relationship between the arrangement of the magnetic poles of the rotor and the arrangement of the teeth of the stator module, as well as the power supply modules of each phase, based on the period until the rotor of the motor rotates once in the motor system of FIG. 2 picture. 14 is a diagram schematically showing the relationship between the arrangement of the magnetic poles of the rotor and the arrangement of the coils of the stator module at positions in the circumferential direction about the motor rotation axis in the motor system of FIG. 2 . FIG. 15 is a diagram schematically showing the motor system according to the second embodiment of the present invention in a cross section including the motor rotation axis. FIG. 16 is a diagram schematically showing the stator module provided in the motor system of FIG. 15 from one side in the direction of the motor rotation axis in a state of being mounted on a base member. FIG. 17 is a diagram schematically showing one phase stator module among the plurality of phase stator modules forming the stator module of FIG. 16 from one side in the direction of the motor rotation axis. FIG. 18 is a diagram schematically showing the phase core blocks forming the phase stator module of FIG. 17 from the direction of the motor rotation axis. FIG. 19 is an enlarged view showing the relationship between the stator module, the power supply module, and the base member in the motor system of FIG. 15 . FIG. 20 is a diagram schematically showing an example of distributed winding of a coil.

20A: Stator module/module (first embodiment)

22: Teeth

24: coil

24U-, 24U+: U-phase coil

24V-, 24V+: V phase coil

24W-, 24W+: W phase coil

201:Phase stator module

201U:U phase stator module

201V:V phase stator module

201W:W phase stator module

O: Motor rotation axis

Claims (13)

A motor system for inverter control of a multi-phase motor, The motor system includes: a stator module, which is formed by winding coils on a plurality of teeth arranged at intervals in the circumferential direction around the rotation axis of the motor; and a power supply module, which is installed on the base member with corresponding teeth respectively. It is composed of multiple upper and lower arm devices. The stator module and the power module are arranged in a position aligned along the rotation axis of the motor, The stator module is installed on one side of the base member in the direction of the motor rotation axis, and the plurality of upper and lower arm device groups is installed on the other side of the base member in the direction of the motor rotation axis. The motor system according to claim 1, wherein the stator module includes a plurality of phase stator modules divided according to each phase along the circumferential direction around the rotation axis of the motor, The power module includes a plurality of phase power modules divided into each phase along the circumferential direction around the rotation axis of the motor. The motor system according to claim 2, wherein when viewed from the direction of the motor rotation axis, the phase stator module and the phase power module corresponding to the phase stator module are arranged around the motor rotation axis. are aligned with each other in the circumferential direction. The motor system according to claim 2 or 3, wherein the phase stator module is divided according to each phase. The motor system according to any one of claims 2 to 4, wherein the phase power module is divided according to each phase. The motor system according to any one of claims 1 to 5, further comprising a power module control unit for controlling the power module, and the power module control unit is disposed across the motor rotation axis direction. The power module is located on the opposite side to the stator module. The motor system according to any one of claims 1 to 6, wherein the polyphase motor is a brushless three-phase AC motor with a number of poles P and a number S of slots, and the number P of poles and the number S of slots satisfy the following The relationship (1) and relationship (2) of: P=3n±1 (n: positive odd number except 1)…(1) S=3n (n: a positive odd number other than 1)…(2). The motor system according to any one of claims 1 to 7, wherein the coils are respectively wound on one of the teeth by concentrated winding. The motor system according to claim 7 or 8, wherein the stator module includes a plurality of phase stator modules divided according to each phase in the circumferential direction around the motor rotation axis, and the upper and lower arm devices corresponding to each phase and the corresponding phase stator module form a pair. The motor system according to any one of claims 1 to 7, wherein the coils are respectively wound on a plurality of the teeth through distributed winding. The motor system of any one of claims 1 to 10, wherein the polyphase motor is an axial gap motor. The motor system of any one of claims 1 to 10, wherein the polyphase motor is a radial gap motor. The motor system according to any one of claims 1 to 12 additionally includes a transmission.

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