JP2019040934A - Scott transformer and vehicle - Google Patents

Abstract

To provide Scott transformer capable of increasing degree-of-freedom in a mounting performance and assemblability.SOLUTION: In a Scott transformer 10, a main seat coil part 30 is formed in an annual form, and a pair of cores 11 and 12 are provided in a role state in the circumference of a part of the main seat coil part 30. A T seat coil part 40 is also formed in the annual form, and a pair of cores 13 and 14 are provided in the role state in the circumference of a part of the T seat coil part 40. Thus, an effective cross sectional area of an iron core is uniformly formed as compared to an EI core or an EE core of a structure that a coil is wound around a leg, and a magnetic circuit can be reduced. A diameter of the cores 11 to 14 can be reduced, and a volume of the Scott transformer 10 can be reduced. Since the cores 11 and 12 and the cores 13 and 14 are separately structured, the main seat coil part 30 having the cores 11 and 12 and the T seat coil part 40 having the cores 13 and 14 can be separately arranged in accordance with a mounting space. Therefore, degree-of-freedom in a mounting performance and assemblability can be increased.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a Scott transformer and a vehicle including the same.

  The Scott transformer is a transformer in which four coils are Scott-connected so that a three-phase alternating current can be converted into two single-phase alternating currents. Sometimes called Scott connection transformer. For example, as in the “Scott connection transformer” disclosed in Patent Document 1 below, a primary winding and a secondary winding wound around a main core (main primary coil, main secondary coil) And a primary winding and a secondary winding (T seat primary coil, T seat secondary coil) wound around the T seat core.

  The main seat primary coil is connected between the U-W phases of the three-phase alternating current, and the T seat primary coil is connected between the midpoint of the main seat primary coil and the V phase. The main seat secondary coil is wound on the winding layer of the main seat primary coil, and the T seat secondary coil is wound on the winding layer of the T seat primary coil.

  The main seat core and the T seat core around which such four coils (main seat primary coil, main seat secondary coil, T seat primary coil, T seat secondary coil) are wound, It is configured integrally by using a wound iron core so as to have a “Sun” shape, or by combining two or more types of electromagnetic steel sheets. In addition, the energy consumption efficiency can be improved by making the iron core shape and material integrally forming the main seat and the T-core iron core into a special specification.

  However, since the “Scott-connected transformer” in Patent Document 1 has to have a special specification for the iron core, it is difficult to suppress the manufacturing cost of the transformer.

  Therefore, in the “Scott transformer” disclosed in Patent Document 2 below, the main seat core and the T seat core are separated by using a plurality of standard rectangular wound cores instead of special specifications. It proposes a Scott transformer that can be manufactured at low cost.

JP 2013-128057 A JP 2006-181658 A

  However, the "Scott transformer" of Patent Document 2 winds a main seat primary coil, a main seat secondary coil, or a T seat primary coil or a T seat secondary coil around a rectangular wound iron core. . Therefore, as the number of turns of these coils increases, the size of the transformer is likely to increase. Therefore, such a “Scott transformer” may be difficult to install depending on the size of the space. In other words, the “Scott transformer” of Patent Document 2 does not have a high degree of freedom in attachment and assembly.

  Further, since the Scott transformer can convert a three-phase alternating current into two single-phase alternating currents, for example, in a vehicle having different electrical systems such as a traveling motor and a power motor, it is easy to use. However, compared to an installation type Scott transformer for equipment and the like, the in-vehicle type Scott transformer may need to be installed in a small mounting space for auxiliary equipment. Therefore, the “Scott transformer” of Patent Document 2 that does not have a high degree of freedom in mounting and assembling is not suitable for mounting a vehicle having a small mounting space.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a Scott transformer that can increase the degree of freedom of attachment and assembly. Another object of the present invention is to provide a vehicle that can be provided with a different electrical system even when the mounting space for auxiliary equipment is small.

  In order to achieve the above object, a Scott transformer according to claim 1 of the present invention includes a main seat primary coil, a main seat secondary coil, a T seat primary coil, and a T seat secondary coil. A Scott transformer having a winding layer of the main seat primary coil and a winding layer of the main seat secondary coil, and these winding layers including two main seat coil linear portions arranged in parallel A pair of main seat cores provided in a cylindrical shape around each of the two main seat coil straight portions, and the T seat A T seat coil portion having a winding layer of a primary coil and a winding layer of the T seat secondary coil, and these winding layers are formed in an annular shape including two parallel T seat coil straight portions; , The two T-seat coil straight parts are arranged around their respective axes. And technical comprising: a pair of T seat core provided in a cylindrical shape, to.

  The main seat coil portion is formed in an annular shape including two main seat coil straight portions, and a pair of main seat iron cores are provided in a cylindrical shape around these main seat coil straight portions. Further, the T seat coil portion is formed in an annular shape including two T seat coil straight portions, and a pair of T seat cores are provided in a cylindrical shape around these T seat coil straight portions. Thereby, the cylindrical core covers the periphery of the coil.

  For this reason, for example, the effective cross-sectional area of the iron core is uniform compared to the case of an EI core or EE core configured to wind a coil around a leg, so that the magnetic path can be shortened. It becomes possible to reduce the cylinder diameter of the T seat core. Therefore, the volume of the Scott transformer is larger than that in the case where the Scott transformer is configured by winding the main seat primary coil, the main seat secondary coil, the T seat primary coil, and the T seat secondary coil around the EI core or the EE core. It becomes possible to reduce.

  In addition, since the main seat core and the T seat core are configured separately from each other, the main seat coil portion in which the main seat core is provided around the main seat coil straight portion, and the T seat coil straight portion. It is possible to separately arrange the T seat coil portion provided with the T seat core around the mounting space in accordance with the mounting space.

  The Scott transformer according to claim 2 of the present invention is the Scott transformer according to claim 1, wherein the pair of main cores and the pair of T cores are the pair of main cores. A technical feature is that both the shafts of the core and the shafts of the pair of T cores are provided in a positional relationship included in the same virtual plane.

  It is possible to make the physique of the Scott transformer low by arranging the main seat core and the T seat core, which are configured separately, so that they are arranged in the direction in which the virtual plane including those axes expands. Become.

  For example, when the main seat coil portion is long in the longitudinal direction of the main seat coil linear portion and the T seat coil portion is formed long in the longitudinal direction of the T seat coil linear portion, a pair of main seat cores and a pair By positioning the T-seat iron cores so as to be aligned in the axial direction of these iron cores, the Scott transformer can be mounted or assembled in a rectangular parallelepiped space that is strip-shaped and not high (low) in plan view. It becomes possible.

  Further, for example, when the main seat coil portion is long in the longitudinal direction of the main seat coil straight portion and the T seat coil portion is formed long in the longitudinal direction of the T seat coil straight portion, a pair of main seat cores And the pair of T seat cores are arranged so as to be aligned in the radial direction of these cores, so that the Scott transformer is attached or assembled in a rectangular shape that is close to a square in a plan view and not high (low). It becomes possible.

  Further, the Scott transformer according to claim 3 of the present invention is the Scott transformer according to claim 1, wherein the pair of main seat cores and the pair of T seat cores are the pair of main cores. It is a technical feature that the shafts of both of the cores and the shafts of the pair of T-cores are provided in a positional relationship included in different virtual planes.

  The direction in which these virtual planes of the Scott transformer are expanded by, for example, stacking and positioning the main and T seat cores that are configured separately so that their axes are included in different virtual planes. It becomes possible to make the physique small. In addition, for example, by positioning so that they do not overlap each other, the Scott transformer can be attached or assembled in an irregular space such as a staircase shape.

  Further, the Scott transformer according to claim 4 of the present invention is the Scott transformer according to claim 3, wherein the pair of main seat cores and the pair of T seat cores are laminated. This is a technical feature.

  Since the pair of main seat cores and the pair of T seat cores are stacked, the physique of the Scott transformer can be reduced.

  Further, the Scott transformer according to claim 5 of the present invention is the Scott transformer according to claim 1, wherein the pair of main seat cores and the pair of T seat cores are the pair of main cores. A technical feature is that a virtual plane including both the axes of the core and a virtual plane including the axes of the pair of T cores are provided in a substantially orthogonal positional relationship.

  For example, by positioning the main seat core and the T seat core, which are configured separately, in an L-shape so as to be included in virtual planes whose axes are orthogonal to each other, the Scott transformer is L-shaped, etc. It is possible to attach or assemble to a deformed space.

  Moreover, in the Scott transformer of the present invention described in Claim 6 of the claim, the Scott transformer according to any one of Claims 1 to 5 is a two-phase single-phase output from the Scott transformer. A technical feature is that AC power is supplied to each of separate electric systems of the vehicle.

  Two separate single-phase AC powers output from the Scott transformer are supplied to separate electrical systems of the vehicle. Therefore, it is possible to obtain two systems of single-phase AC power without providing two sets of power systems including the power transformer.

  In order to achieve the above object, a vehicle according to a seventh aspect of the present invention is a vehicle including the Scott transformer according to any one of the first to fifth aspects, A first power storage device that is charged by receiving DC power obtained by AC-DC conversion of one single-phase AC power of two systems output from the Scott transformer, and is driven by power supplied from the first power storage device A first electric motor, a second electric storage device charged by receiving DC power obtained by AC / DC conversion of the other single-phase AC electric power of the two systems output from the Scott transformer, and the second electric storage device And a second motor that is driven by the power supplied from the apparatus.

  The said vehicle is equipped with the Scott transformer as described in any one of Claims 1-5. Therefore, the first power storage device is charged with DC power output from the Scott transformer and AC / DC converted, so the first motor can directly receive or orthogonally convert DC power output from the first power storage device. It can be driven by receiving it via a simple inverter or the like. In addition, since the second power storage device is also charged with DC power output from the Scott transformer and AC / DC converted, the second motor can receive DC power output from the second power storage device directly or be orthogonally converted. It can be driven by receiving it via a simple inverter or the like.

  In the Scott transformer of the present invention, compared to the case where the Scott transformer is configured by winding the main seat primary coil, the main seat secondary coil, the T seat primary coil, and the T seat secondary coil around the EI core or the EE core. The volume of the Scott transformer can be reduced. Moreover, the main seat coil part in which the main seat iron core is provided around the main seat coil straight part, and the T seat coil part in which the T seat iron core is provided around the T seat coil straight part are used as a mounting space. It is possible to arrange them separately. Accordingly, it is possible to increase the degree of freedom of attachment and assembly.

  In the vehicle of the present invention, the first power storage device is charged with DC power output from the Scott transformer and AC / DC converted, so the first motor directly receives the DC power output from the first power storage device. Or via an inverter or the like that can be orthogonally transformed. In addition, since the second power storage device is also charged with DC power output from the Scott transformer and AC / DC converted, the second motor can receive DC power output from the second power storage device directly or be orthogonally converted. It can be driven by receiving it via a simple inverter or the like. Therefore, even when the mounting space for auxiliary equipment is narrow, different electrical systems can be provided.

It is a perspective view showing an example of composition of a Scott transformer concerning one embodiment of the present invention. It is a circuit diagram which shows the example of a connection of the Scott transformer of this embodiment. It is a perspective view which shows the example of the main seat transformation part and T seat transformation part which comprise the Scott transformer of this embodiment. It is a perspective view which shows the detailed structural example of the main transformer part shown in FIG. It is a perspective view which shows the state which remove | excluded two cores from the main transformer part shown in FIG. It is sectional drawing which shows the state cut | disconnected by the VI-VI line shown in FIG. It is a perspective view which shows the example of the side plate which comprises the Scott transformer of this embodiment. It is explanatory drawing which shows the example of the variation of the attachment aspect which attaches the Scott transformer of this embodiment to a to-be-attached part.

  Embodiments of a Scott transformer and a vehicle according to the present invention will be described below with reference to the drawings. First, a configuration outline of the Scott transformer 10 will be described with reference to FIGS. FIG. 1 is a perspective view illustrating a configuration example of the Scott transformer 10 according to the present embodiment. FIG. 2 is a circuit diagram showing a connection example of the Scott transformer 10 of the present embodiment. FIG. 3 is a perspective view illustrating an example of the main seat transformer 10a and the T seat transformer 10b constituting the Scott transformer 10. FIG.

  As shown in FIG. 1, the Scott transformer 10 according to the present embodiment includes a main transformer portion 10a, a T seat transformer portion 10b, a side plate 50, an upper plate 60, and the like. As described in the “Background Art” section, the Scott transformer 10 is a transformer in which four coils are Scott-connected so that a three-phase alternating current can be converted into two single-phase alternating currents.

  That is, in the Scott transformer 10 of the present embodiment, as shown in FIG. 2, the main seat primary coil 31 is connected between the U-W phases of the three-phase alternating current, and the midpoint of the main seat primary coil 31 and V A T seat primary coil 41 is connected between the phases. The main seat secondary coil 32 is wound on the winding layer of the main seat primary coil 31, and is connected between one single-phase AC Va-0. Further, the T seat secondary coil 42 is wound on the winding layer of the T seat primary coil 41 and connected between the other single-phase AC Vb-0. Around the main seat primary coil 31 and the main seat secondary coil 32, cores 11 and 12 that can efficiently magnetically couple them are provided, and the T seat primary coil 41 and the T seat 2 are provided. Also around the next coil 42, cores 13 and 14 that can efficiently magnetically couple them are provided.

  Further, in the present embodiment, the main seat primary coil 31 and the main seat secondary coil 32 (hereinafter, these may be collectively referred to as “main seat coil portion 30”) are wound around the bobbin 20 ( 1 and FIG. 3 are colored light gray). The core 11 and the core 12 are wound around a part of the main seat coil portion 30 wound around the bobbin 20. The main seat primary coil 31 is, for example, a round wire having a circular cross section. The main secondary coil 32 is, for example, a flat wire having a flat rectangular cross section.

  In this embodiment, a round wire is selected for the main seat primary coil 31 and a flat wire is selected for the main seat secondary coil 32. However, a flat wire is selected for the main seat primary coil 31, and the main wire is selected. A round wire may be selected for the seat secondary coil 32. The same applies to a T seat primary coil 41 and a T seat secondary coil 42 described later. Whether to select a round wire or a rectangular wire is appropriately determined based on the specifications of the Scott transformer 10 (current flowing through the coil, allowable heat generation temperature, etc.).

  The cores 11 and 12 are made, for example, by winding an electromagnetic steel plate in an air core roll shape (tubular shape), and both are configured separately. In the present embodiment, a part of the main coil portion 30 (a straight portion 31b described later) is located in the air core portion of the cores 11 and 12.

  That is, the cores 11 and 12 are further wound around the bobbin 20 around which the main seat primary coil 31 and the main seat secondary coil 32 are wound, and are arranged in parallel. Hereinafter, the main seat coil portion 30 wound around the bobbin 20 and the cores 11 and 12 wound around the main seat coil portion 30 may be collectively referred to as a “main seat transforming portion 10a”.

  With respect to the main seat coil portion 30, a T seat primary coil 41 and a T seat secondary coil 42 (hereinafter, these may be collectively referred to as “T seat coil portion 40”) are also wound around the bobbin 20. It has been turned. The core 13 and the core 14 (not shown in FIG. 1) are wound around a part of the T seat coil portion 40 wound around the bobbin 20. Similarly to the cores 11 and 12, the cores 13 and 14 are, for example, electromagnetic steel plates wound in an air core roll shape (tubular shape), and both are configured separately. In the present embodiment, a part of the T seat coil portion 40 (a linear portion 41b described later) is located in the air core portion of the cores 13 and 14.

  That is, as will be described later, the cores 13 and 14 are further wound around the bobbin 20 around which the T seat primary coil 41 and the T seat secondary coil 42 are wound, and are arranged in parallel. Hereinafter, the T seat coil portion 40 wound around the bobbin 20 and the cores 13 and 14 wound around the T seat coil portion 40 may be collectively referred to as “T seat transforming portion 10b”.

  As shown in FIG. 3, in the Scott transformer 10 of the present embodiment, the main transformer portion 10a and the T seat transformer portion 10b are configured separately. Therefore, the cores 11 to 14 are all configured separately, and the cores 11 and 12 of the main transformer portion 10a and the cores 13 and 14 of the T seat transformer portion 10b are also positive in terms of magnetic circuit. Is not connected.

  For this reason, as shown in the circuit diagram of FIG. 2, the main transformer section 10a and the T seat transformer section 10b are configured as if they were separate transformers, but the main transformer of the main transformer section 10a. By connecting the primary coil 31 and the T-seat primary coil 41 of the T-seat transformer 10b by a Scott connection, in this embodiment, the Scott transformer 10 is configured as a whole.

  Such Scott connection, lead wire, tap, terminal, etc. are not shown in the drawings other than FIG. Further, the cores 11 and 12 and the cores 13 and 14 are fixed to the bobbin 20 by a metal fitting (not shown) and a varnish covering the core 11 and the like including the metal fitting.

  As shown in FIG. 1, the main seat transformer 10 a and the T seat transformer 10 b sandwich the axial ends of the cores 11 to 14 wound around the bobbins 20 by the two side plates 50. It is fixed. In the present embodiment, these side plates 50 are provided with slits 51 and 52 at two locations as will be described in detail later with reference to FIG. A wound bobbin 20 is inserted (see FIG. 7).

  In the present embodiment, an upper plate 60 having an elongated L-angle shape is provided on the top of the side plate 50 so as to close the openings of the slits 51 and 52 of the side plate 50. Such two side plates 50 are formed on the upper side of the side plate 50 (shown in FIG. 1) by six bolts 70 whose axial length is set larger than the axial length of the core 11 and the like and nuts (not shown). The screw is fastened and fixed at three locations in the coordinate system in the direction of the arrow of the Z axis and at three locations on the lower side of the side plate 50 (the root direction of the Z axis in the coordinate system). The upper plate 60 is fastened together with the side plate 50 and fixed to the side plate 50 by bolts 70 inserted through the upper side of the side plate 50.

  Next, the configuration of the main seat transformer 10a and the T seat transformer 10b (particularly the configuration of the bobbin 20) will be described in more detail with reference to FIGS. FIG. 4 is a perspective view showing a detailed configuration example of the main transformer portion 10a. FIG. 5 is a perspective view showing a state in which the cores 11 and 12 are removed from the main transformer portion 10a. Further, FIG. 6 is a cross-sectional view showing a state cut along line VI-VI shown in FIG. In addition, in these figures, although the structural example of the main transformer part 10a is shown in figure, the T seat transformer part 10b is also comprised similarly to the main transformer part 10a so that it may mention later.

  As described above, the bobbin 20 that constitutes the main transformer portion 10a and around which the cores 11 and 12 and the main coil portion 30 are wound is, for example, non-combustible as shown in FIGS. It is formed in a rectangular ring shape using a conductive resin. More specifically, for example, the bobbin 20 is composed of a main body portion 21, plate portions 23 and 24, tap lead portions 25 and 26, and the like, which are integrally formed.

  The main body 21 has a rectangular frame shape, and includes two plate portions 23 and 24 on both sides (front side and back side) of the frame. A coil winding portion 21 a is formed between the plate portions 23 and 24, and a core winding portion 21 b is formed in the cutout portion 23 a of the plate portion 23 and the cutout portion 24 a of the plate portion 24. In the present embodiment, the notches 23 a and 24 a are formed so as to extend along the longitudinal direction of the bobbin 20 on both sides of the main body 21 in the short direction. A pair of cores 11 and 12 are wound side by side in the range of the notches 23a and 24a.

  On the other hand, a tap lead portion 25 is formed on one side of the main body portion 21 in the longitudinal direction, and a tap lead portion 26 is formed on the other side in the longitudinal direction. A plurality of holes (not shown) are formed in the tap lead portions 25 and 26, and coil end portions (coil wire rods) of the main seat primary coil 31 and the main seat secondary coil 32 wound around the bobbin 20. The end portion of each of the holes can be pulled out from these holes.

  For example, the coil end portion of the main seat primary coil 31 can be drawn from the tap lead portion 25, and the coil end portion of the main seat secondary coil 32 can be drawn from the tap lead portion 26. The coil end portion of the main seat secondary coil 32 may be drawn from the tap lead portion 25, and the coil end portion of the main seat primary coil 31 may be drawn from the tap lead portion 26. 4 and 5 do not show these coil ends.

  Also in the bobbin 20 which comprises the T seat transformation part 10b and the cores 13 and 14 and the T seat coil part 40 are wound, the main body part 21 and the plate part 23 are similar to the bobbin 20 of the main seat transformation part 10a. 24, tap lead portions 25, 26, etc. are integrally formed. Then, the coil end portions (end portions of the coil wire rods) of the T seat primary coil 41 and the T seat secondary coil 42 wound in parallel on the bobbin 20 can be pulled out from the tap lead portions 25 and 26. A plurality of holes (not shown) are formed in these.

  As a result, the coil end portion of the T seat primary coil 41 can be drawn from the tap lead portion 25, and the coil end portion of the T seat secondary coil 42 can be drawn from the tap lead portion 26. The coil end portion of the T seat secondary coil 42 may be drawn from the tap lead portion 25, and the coil end portion of the T seat primary coil 41 may be drawn from the tap lead portion 26. Note that these coil ends are not shown in FIGS.

  As described above, the main winding primary coil 31 and the main winding secondary coil 32 are wound around the coil winding portion 21a of the bobbin 20 configured as described above, or the T seat primary coil 41 and the T seat. The secondary coil 42 is wound. That is, as shown in FIG. 6, in the case of the bobbin 20 of the main transformer part 10a, the main coil 31 is wound on the innermost side of the coil winding part 21a and the main coil 31 is wound. The rotating layer 31a is formed. Then, the main seat secondary coil 32 is further wound on the winding layer 31 a to form a winding layer 32 a of the main seat secondary coil 32.

  In FIG. 6, the portion of the winding layer 31a of the main seat primary coil 31 is colored dark gray instead of the illustrated round wire, and the winding layer of the main seat secondary coil 32 It should be noted that the portion 32a is colored light gray instead of the illustrated rectangular wire being wound. In the present embodiment, the main seat secondary coil 32 is wound on the main seat primary coil 31. On the contrary, the main seat is placed on the main seat secondary coil 32. A configuration in which the primary coil 31 is wound may be employed.

  Although not shown, in the case of the bobbin 20 of the T seat transformer 10b, the T seat primary coil 41 is wound on the innermost side of the coil winding portion 21a and the T seat primary coil 41 is wound. Layer 41a is formed. Then, the T seat secondary coil 42 is further wound on the winding layer 41 a to form a winding layer 42 a of the T seat secondary coil 42. In FIG. 6, the dark gray colored portion corresponds to the winding layer 41 a of the T seat primary coil 41, and the light gray colored portion corresponds to the winding layer 42 a of the T seat secondary coil 42. . In the present embodiment, the T seat secondary coil 42 is wound around the T seat primary coil 41. On the contrary, the T seat primary coil 42 is placed on the T seat secondary coil 42. A configuration in which the coil 41 is wound may be employed.

  In addition, since the core 11 and the core 12 are wound in the range of the notches 23a and 24a of the plate portions 23 and 24, the main seat primary coil 31 wound in the range of the notches 23a and 24a. A part of the main seat secondary coil 32 is also a straight portion 31b of the main seat primary coil 31 and a straight portion 32b of the main seat secondary coil 32 (see FIGS. 4 to 6). The winding axis J of the cores 11 and 12 wound in such a range exists substantially at the center of the radial cross section in the coil winding portion 21a.

  Although not shown, in the bobbin 20 around which the cores 13 and 14 are wound, the T seat primary coil 41 and T wound around the range of the notches 23a and 24a of the plate portions 23 and 24. A part of the seat secondary coil 42 is also a straight portion 41 b of the T seat primary coil 41 and a straight portion 42 b of the T seat secondary coil 42. Although not shown, the winding axis K of the cores 13 and 14 wound in such a range is also in the radial direction in the coil winding portion 21a in the same manner as the winding axis J of the cores 11 and 12. Present at approximately the center of the cross section.

  As described above, in the main transformer portion 10a constituting the Scott transformer 10 of the present embodiment, the straight portion 31b of the main seat primary coil 31 and the straight portion 32b of the main seat secondary coil 32 wound around the bobbin 20 are provided. It exists in the air core part of the cores 11 and 12 which wound the electromagnetic steel plate in roll shape. Similarly, in the T seat transformer 10b, the straight portion 41b of the T seat primary coil 41 and the straight portion 42b of the T seat secondary coil 42 wound around the bobbin 20 wind the electromagnetic steel sheet in a roll shape. Present in the air core portion of the cores 13 and 14. And the winding axis J of the cores 11 and 12 and the winding axis K of the cores 13 and 14 are located in the approximate center of the radial direction cross section in the coil winding part 21a.

  Thereby, the cores 11 and 12 can cover the circumference of the main seat primary coil 31 and the main seat secondary coil 32 in the wire diameter direction almost uniformly. Therefore, the effective cross-sectional areas of the cores 11 and 12 can be made substantially uniform, the magnetic path can be shortened, and the roll diameter (roll diameter) of the cores 11 and 12 can be reduced. Further, the cores 13 and 14 can cover the circumference of the T seat primary coil 41 and the T seat secondary coil 42 in the wire diameter direction almost uniformly. Therefore, the effective cross-sectional areas of the cores 13 and 14 can be made substantially uniform, the magnetic path can be shortened, and the roll diameter of the cores 13 and 14 can be reduced.

  Then, the structure of the side plate 50 is demonstrated based on FIG. 4 and FIG. FIG. 7 is a perspective view showing an example of the side plate 50. In the present embodiment, a structure is adopted in which the main transformer section 10a and the T seat transformer section 10b (cores 11 to 14) are sandwiched by the two side plates 50 from both sides in the winding axis J and K directions. doing.

  The side plate 50 is, for example, a belt-shaped iron plate that is wider than the length in the stacking direction (X-axis direction shown in FIG. 1) when the main seat transforming portion 10a and the T seat transforming portion 10b are positioned in the stacking state. It is processed into a letter shape. In the present embodiment, one end side longer than the length of the cores 11 and 12 wound side by side in the arrangement direction (Z-axis direction shown in FIG. 1) is used as the holding part 50a, and more than the holding part 50a. The short other end side is the mounting portion 50b.

  In the sandwiching part 50a, slits 51 and 52 extending in the longitudinal direction of the sandwiching part 50a are formed in two places. For example, the slits 51 and 52 are formed so that the sandwiching portion 50a has an E shape. The spacing between the slits 51 and 52 is, for example, a gap of a predetermined distance so that the main seat transformer 10a held by the slit 51 and the T seat transformer 10b held by the slit 52 do not contact each other. Is set to be. The predetermined distance of the gap formed between the main seat transformer 10a and the T seat transformer 10b is, for example, sufficient for cooling air blown by an unillustrated cooling fan or air in the surrounding space. The size is set.

  A gap portion formed between the inner end surface 25a of the tap lead portion 25 of the bobbin 20 and the end surfaces 11a and 12a of the cores 11 and 12 by the slit 51 (portion indicated by the black triangular arrow shown in FIG. 4). Is inserted into the main transformer part 10a. In addition, gaps (portions indicated by white triangle arrows shown in FIG. 4) formed between the inner end surface 26a of the tap lead-out portion 26 of the bobbin 20 and the end surfaces 11b and 12b of the cores 11 and 12 are formed as slits 51. The other end side of the main transformer part 10a is held by being sandwiched between the two.

  Although not shown in FIG. 4, similarly, a gap portion formed by the slit 52 between the inner end surface 25 a of the tap lead portion 25 of the bobbin 20 and the end surfaces 13 a and 14 a of the cores 13 and 14. By sandwiching (a portion corresponding to the portion indicated by the black triangular arrow shown in FIG. 4), one end of the T-seat transformer 10b is held. Further, a gap portion formed between the inner end surface 26a of the tap lead-out portion 26 of the bobbin 20 and the end surfaces 13b and 14b of the cores 13 and 14 (the portion corresponding to the portion indicated by the white triangle arrow shown in FIG. 4), By sandwiching these slits 52, the other end side of the T seat transformer 10b is held.

  In addition, three through holes 54 through which the bolts 70 can be inserted are formed in the vicinity of the upper end side of the holding portion 50a where the slits 51 and 52 are opened. Also, through holes 54 through which the bolts 70 can be inserted are formed at three locations also in the vicinity of the lower end side of the clamping portion 50a corresponding to the deepest portion of the slits 51 and 52.

  The attachment portion 50b formed to be bent at a substantially right angle with respect to the sandwiching portion 50a is a substantially flat plate member, and long holes 56 are formed at a plurality of locations. The long hole 56 is set to a hole diameter through which a screw (not shown) capable of screwing the side plate 50 to the attached portion can be inserted. In the present embodiment, the long holes 56 are formed in two places.

  In the present embodiment, the main transformer part 10a and the T seat transformer part 10b (cores 11 to 14) are sandwiched by the two side plates 50 from both sides of the winding axes J and K of the cores 11 to 14. Although the structure which pinches | interposes is employ | adopted, even if it takes the structure which pinches | interposes the main seat transformer part 10a (cores 11 and 12) and the T seat transformer part 10b (cores 13 and 14) by a separate side plate Good.

  That is, the main seat transformer 10a (cores 11 and 12) is sandwiched by two side plates having slits 51, and the T seat transformer 10b (cores 13 and 14) is sandwiched by two side plates having slits 52. To do. Thereby, since the load by the main seat transformation part 10a added to one side plate and the T seat transformation part 10b is halved, it becomes possible to reduce the mechanical strength of a side plate. For example, it is possible to reduce the thickness of an iron plate constituting the side plate or reduce the number of ribs or the like that can be improved in mechanical strength.

  With this configuration, the Scott transformer 10 (10A) of the present embodiment is attached to the attached portion Wa as shown in FIG. 8A, for example. In this case, the side plate 50 is fixed by attaching a mounting portion 50b to the mounted portion Wa by fastening a bolt (not shown) to the mounted portion Wa. The virtual plane Pa corresponds to the XY plane of the coordinate system shown in FIG.

  8 (A) to 8 (F) are explanatory views showing examples of variations of attachment modes for attaching the Scott transformer 10 of the present embodiment to the attached portion Wa or the like. In these figures, it should be noted that the main seat transformer 10a and the T seat transformer 10b are simply represented in a rectangular parallelepiped shape for convenience and are colored in gray. The parallelogram represented by the two-dot chain line is a virtual plane Pa including the two winding axes J of the main transformer part 10a described with reference to FIGS. 5 and 6, and a T seat transformer part 10b. Is a virtual plane Pb including the two winding axes K. Further, the attached portion Wa, the attached portion Wb, and the attached portion Wc are provided so as to be orthogonal to each other.

  Further, as shown in FIG. 8B, the main transformer portion 10a and the T seat transformer portion 10b of the Scott transformer 10B are arranged in a flat state with respect to the attached portion Wa. That is, the virtual plane Pa including the two winding axes J of the main seat transformer 10a and the virtual plane Pb including the two winding axes K of the T seat transformer 10b are substantially parallel to the mounted portion Wa. The main transformer part 10a and the T seat transformer part 10b are stacked in a positional relationship overlapping with each other. Thereby, in the said lamination direction, the magnitude | size equivalent to the sum of the roll diameter of the core 11 and the roll diameter of the core 13 (or the roll diameter of the core 12 and the roll diameter of the core 14) becomes the height of the Scott transformer 10B. .

  Further, as shown in FIG. 8 (C), the main transformer portion 10a and the T seat transformer portion 10b of the Scott transformer 10C are arranged in a flat state with respect to the mounted portion Wc. That is, the virtual plane Pa including the two winding axes J of the main transformer section 10a and the virtual plane Pb including the two winding axes K of the T seat transformer section 10b are substantially parallel to the mounted part Wc. The main transformer part 10a and the T seat transformer part 10b are stacked in a positional relationship overlapping with each other. Thus, in the stacking direction, the size corresponding to the sum of the roll diameter of the core 11 and the roll diameter of the core 13 (or the roll diameter of the core 12 and the roll diameter of the core 14) is the height of the Scott transformer 10C. .

  In the Scott transformers 10A to 10C, the main transformer portion 10a and the T seat transformer portion 10b are stacked and positioned so that their winding axes J and K are included in different virtual planes. It is possible to reduce the physique in the direction in which the 10C virtual planes Pa and Pb expand.

  Further, as shown in FIG. 8D, the main transformer portion 10a and the T seat transformer portion 10b of the Scott transformer 10D are arranged side by side with respect to the attached portion Wa. That is, the main transformer part is in a positional relationship in which the two winding axes J of the main transformer part 10a and the two winding axes K of the T seat transformer part 10b are included in the same virtual planes Pa and Pb. 10a and the T seat transformer part 10b are positioned so as to be arranged in the direction in which the virtual planes Pa and Pb expand. Thereby, since the height of the Scott transformer 10 becomes a size corresponding to the roll diameter of the core 11 or the like, it is possible to make the physique of the Scott transformer 10D low. In addition, the Scott transformer 10D can be mounted or assembled in a space in which the planar view with respect to the mounted portion Wa is a rectangular shape close to a square and does not have a high (low) height.

  Further, as shown in FIG. 8 (E), the main seat transformer 10a and the T seat transformer 10b of the Scott transformer 10E are arranged so that the virtual planes Pa and Pb including the winding axes J and K are orthogonal to each other. It arrange | positions in the state which makes L shape. That is, the virtual plane Pa including the two winding axes J of the main transformer section 10a and the virtual plane Pb including the two winding axes K of the T seat transformer section 10b are orthogonal to each other. The main transformer part 10a and the T seat transformer part 10b are positioned in a positional relationship in which the winding axes J and K are not orthogonal to each other. Thereby, it becomes possible to attach or assemble the Scott transformer 10E in an irregular space such as a wide L-shape.

  Furthermore, as shown in FIG. 8 (F), in the main transformer portion 10a and the T seat transformer portion 10b of the Scott transformer 10F, the virtual planes Pa and Pb including the winding axes J and K are orthogonal to each other. Are arranged in an L-shaped state. That is, the virtual plane Pa including the two winding axes J of the main transformer section 10a and the virtual plane Pb including the two winding axes K of the T seat transformer section 10b are orthogonal to each other. The main transformer part 10a and the T seat transformer part 10b are positioned in a positional relationship in which the winding axes J and K are also orthogonal. Thereby, it becomes possible to attach or assemble the Scott transformer 10F to an irregular space such as an elongated L-shape.

  In addition, although not shown in figure, you may arrange | position the main seat transformation part 10a and the T seat transformation part 10b which were arrange | positioned in the horizontal arrangement | sequence state shown to FIG. 8 (D) in the vertical arrangement state with respect to the to-be-attached part Wa. Thereby, it becomes possible to attach or assemble the Scott transformer in a rectangular parallelepiped space where the plan view with respect to the attached portion Wa is a strip shape and the height is not high (low).

  Although not shown in the figure, the Scott transformer is formed in a staircase shape by positioning the main transformer portion 10a and the T seat transformer portion 10b arranged in a flat state shown in FIG. 8B so as not to overlap each other. It becomes possible to attach or assemble to a deformed space such as.

  As described above, in the Scott transformer 10 of the present embodiment, the main coil portion 30 is formed in an annular shape including the two straight portions 31b and 32b, and a pair of them is provided around the straight portions 31b and 32b. The cores 11 and 12 are provided in a roll shape. In addition, the T seat coil portion 40 is formed in a roll shape including two straight portions 41b and 42b, and a pair of cores 13 and 14 are provided in a roll shape around the straight portions 41b and 42b. .

  Therefore, the roll-shaped cores 11 and 12 cover the periphery of the main seat primary coil 31 and the main seat secondary coil 32, and the roll-shaped core 13 surrounds the T seat primary coil 41 and the T seat secondary coil 42. , 14 are covered, for example, the effective cross-sectional area of the iron core becomes uniform and the magnetic path can be shortened as compared with the case of an EI core, EE core or the like configured to wind a coil around a leg. . Moreover, it becomes possible to make the roll diameter of the cores 11-14 small.

  As a result, the Scott transformer 10 is compared with the case where the Scott transformer is configured by winding the main seat primary coil, the main seat secondary coil, the T seat primary coil, and the T seat secondary coil around the EI core or the EE core. The volume of can be reduced. In addition, since the cores 11 and 12 and the cores 13 and 14 are configured as separate parts, the main coil portion 30 provided with the cores 11 and 12 around the straight portions 31b and 32b is included. The main seat transformer portion 10a and the T seat transformer portion 10b including the T seat coil portion 40 in which the cores 13 and 14 are provided around the straight portions 41b and 42b are separately arranged according to the mounting space. (See FIG. 8). Accordingly, it is possible to increase the degree of freedom of attachment and assembly.

  Moreover, since it becomes possible to arrange | position the main seat transformation part 10a and the T seat transformation part 10b separately, the main seat transformation part 10a and the T seat transformation part 10b can be cooled separately. Further, in the portion of the bobbin 20 where the cores 11 to 14 are not wound (portions where the notches 23a and 24a are not present), the main primary coil 31 or T wound around the innermost side of the coil winding portion 21a. The seat primary coil 41 is easily cooled to the cooling air, the air in the surrounding space, or the like via the main body portion 21 of the bobbin 20. Therefore, the Scott due to heat generation of the main seat primary coil 31 and the T seat primary coil 41 wound with a round wire having a smaller wire diameter than the rectangular wire of the main seat secondary coil 32 and the T seat secondary coil 42. An increase in temperature of the transformer 10 can also be suppressed.

  In addition, in this embodiment, although the cores 11 and 12 were comprised by what wound the electromagnetic steel plate in the cylindrical roll shape, the linear part 31b of the main seat primary coil 31 and the straight line of the main seat secondary coil 32 are comprised. If it is a cylindrical main seat core provided around the part 32b, for example, a magnetic steel sheet may be wound in a roll shape such as a rectangular tube shape or a polygonal tube shape. Similarly, for the cores 13 and 14, as long as it is a cylindrical T seat core provided around the straight portion 41 b of the T seat primary coil 41 and the straight portion 42 b of the T seat secondary coil 42, for example, The magnetic steel sheet may be wound into a rectangular or polygonal roll.

  Moreover, in this embodiment, although the cores 11 and 12 were comprised by what wound the electromagnetic steel plate in the roll shape of an air core, the linear part 31b of the main seat primary coil 31 and the straight line of the main seat secondary coil 32 are comprised. In the case of a cylindrical main seat core provided around the portion 32b, for example, ferrite or amosphas may be formed in an air-core cylindrical shape, or may be formed in an air-core prismatic shape or a polygonal prism shape. . Similarly, for the cores 13 and 14, for example, if the cylindrical T seat core provided around the straight portion 41 b of the T seat primary coil 41 and the straight portion 42 b of the T seat secondary coil 42 is ferrite, Or amosus may be formed into an air-core cylindrical shape, or may be formed into an air-core prismatic shape or a polygonal prism shape.

  Here, the electric system of the electric vehicle equipped with the Scott transformer 10 of the present embodiment will be described. An unillustrated electric vehicle is a vehicle in which only the Scott transformer 10 of the present embodiment can be mounted as a transformer for power conversion because the mounting space for auxiliary machines is narrow. The electric vehicle includes, for example, a traveling motor and a power motor. In correspondence with these motors, two sets of batteries, a rectifier circuit and an inverter circuit, and a controller for controlling the inverter circuit are provided.

  Both of the two motors included in the electric vehicle are, for example, three-phase AC motors. The traveling motor is connected via a driving power transmission mechanism that can rotate driving wheels (not shown). The power motor is connected via a power transmission mechanism for conveyance that can drive a conveyance mechanism (not shown).

  In the Scott transformer 10, the input terminals U and W of the main seat primary coil 31 and the input terminal V of the T seat primary coil 41 are connected to input terminals (R, S, and T) of three-phase AC power. The output terminals Va, 0 of the main seat secondary coil 32 and the output terminals Vb, 0 of the T seat secondary coil 42 are connected to a rectifier circuit.

  The two rectifier circuits are, for example, a half-wave rectifier circuit or a full-wave rectifier circuit made of a silicon diode. One rectifier circuit is connected to the output terminal Va, 0 of the main seat secondary coil 32, and the other rectifier circuit is connected to the output terminal Vb, 0 of the T seat secondary coil 42, and each of the AC power is converted to DC. It is configured to be convertible to electric power.

  The two batteries are typically lead acid batteries and lithium ion batteries. These batteries are configured to output a voltage suitable for driving a motor for traveling and a motor for conveyance. Instead of these batteries, for example, an electric double layer capacitor having a capacitance of several F (Farad) to several tens of F may be used. When the output voltage of the rectifier circuit and the output voltage of these batteries or the like are greatly different, a step-down circuit or a step-up circuit may be interposed between the rectifier circuit and these batteries.

  Two inverter circuits provided corresponding to these batteries are each a chopper circuit composed of six switching elements or the like capable of converting DC power into three-phase AC power. In the present embodiment, one inverter circuit can convert a DC voltage output from a battery that outputs a driving voltage of a traveling motor into, for example, a three-phase AC voltage suitable for driving a traveling motor. It is configured. Similarly, the other inverter circuit is configured to be able to convert a DC voltage output from a battery that outputs a driving voltage of the transport motor into, for example, a three-phase AC voltage suitable for driving the transport motor. Has been.

  The controller is a control device configured to be able to control the switching elements of the two inverter circuits, centering on a microcomputer, a semiconductor memory, and the like. In this embodiment, the three-phase AC voltage output from one inverter circuit can be controlled based on the voltage information of the motor sent from a voltage sensor (not shown) capable of measuring the input voltage of the running motor. It is configured. The three-phase AC voltage output from the other inverter circuit can be controlled based on the voltage information of the motor sent from a voltage sensor (not shown) that can measure the input voltage of the conveying motor. ing.

  By configuring the electric vehicle in this manner, the battery that outputs the driving voltage of the traveling motor is charged with the DC power that is output from one single-phase AC output Va of the Scott transformer 10 and converted by the rectifier circuit. Therefore, when the traveling motor receives the DC power output from such a battery via the inverter circuit or the like, the electric vehicle can travel.

  In addition, the battery that outputs the driving voltage of the conveying motor is charged with the DC power that is output from the other single-phase AC output Vb of the Scott transformer 10 and converted by the rectifier circuit. The electric vehicle receives the output DC power via the inverter circuit or the like, so that the electric vehicle can carry the cargo, for example. Therefore, in an electric vehicle, a different electric system can be provided even when the mounting space for auxiliary equipment is narrow.

  In the electric vehicle of the present embodiment, the other motor is used for power for transporting the load, but this motor may also be used for traveling. For example, when the electric vehicle is a four-wheel drive vehicle, one motor may be used for front wheel drive and the other motor may be used for rear wheel drive.

  Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications or changes of the specific examples described above. In addition, the technical elements described in the present specification or drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Furthermore, the technique illustrated in this specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of these objects. Note that the description in parentheses in the [Explanation of Symbols] can clearly indicate the correspondence between the terms used in the above-described embodiments and the terms described in the claims.

DESCRIPTION OF SYMBOLS 10 ... Scott transformer 10a ... Main seat transformation part 10b ... T seat transformation part 11, 12 ... Core (main seat iron core)
13, 14 ... Core (T seat core)
DESCRIPTION OF SYMBOLS 20 ... Bobbin 21 ... Main-body part 21a ... Coil winding part 21b ... Core winding part 23, 24 ... Plate part 25, 26 ... Tap extraction | drawer part 30 ... Main seat coil part 31 ... Main seat primary coil 31a ... Winding layer (Winding layer of main coil for primary)
31b ... straight part (main coil straight part)
32 ... Main seat secondary coil 32a ... Winding layer (winding layer of main seat secondary coil)
32b ... straight part (main coil straight part)
40 ... T seat coil part 41 ... T seat primary coil 41a ... winding layer (winding layer of T seat primary coil)
41b ... straight part (T seat coil straight part)
42 ... T seat secondary coil 42a ... Winding layer (winding layer of T seat secondary coil)
42b ... straight part (T seat coil straight part)
DESCRIPTION OF SYMBOLS 50 ... Side plate 50a ... Clamping part 50b ... Mounting part 51, 52 ... Slit 60 ... Upper plate 70 ... Bolt J ... Core winding axis (shaft of core iron core)
K ... Core winding axis (T seat core axis)
Pa, Pb ... Virtual plane Wa, Wb, Wc ... Mounted part

Claims (7)

A Scott transformer having a main seat primary coil, a main seat secondary coil, a T seat primary coil, and a T seat secondary coil,
A main seat having a winding layer of the main seat primary coil and a winding layer of the main seat secondary coil, and these winding layers are formed in an annular shape including two parallel main seat coil portions. A coil section;
A pair of main seat cores provided in a cylindrical shape around the main seat coil straight portions with the two main seat coil straight portions as respective axes;
The T seat having a winding layer of the T seat primary coil and a winding layer of the T seat secondary coil, and these winding layers are formed in an annular shape including two parallel T seat coil straight portions. A coil section;
A pair of T seat cores provided in a cylindrical shape around the T seat coil straight portion with the two T seat coil straight portions as respective axes;
A Scott transformer characterized by comprising.   The pair of main seat cores and the pair of T seat cores have a positional relationship in which both the shafts of the pair of main seat cores and the shafts of the pair of T seat cores are included in the same virtual plane. The Scott transformer according to claim 1, wherein the Scott transformer is provided.   The pair of main seat cores and the pair of T seat cores are in a positional relationship in which the axes of the pair of main seat cores and the axes of the pair of T seat cores are included in different virtual planes. The Scott transformer according to claim 1, wherein the Scott transformer is provided.   The Scott transformer according to claim 3, wherein the pair of main seat cores and the pair of T seat cores are stacked.   The pair of main seat cores and the pair of T seat cores include a virtual plane including the axes of both the pair of main seat cores and a virtual plane including the axes of the pair of T seat cores. The Scott transformer according to claim 1, wherein the Scott transformer is provided in a substantially orthogonal positional relationship. The Scott transformer according to any one of claims 1 to 5 is mounted on a vehicle,
The two-system single-phase AC power output from the Scott transformer is supplied to separate electric systems of the vehicle, respectively. A vehicle comprising the Scott transformer according to any one of claims 1 to 5,
A first power storage device that is charged by receiving DC power obtained by AC / DC conversion of one single-phase AC power of the two systems output from the Scott transformer;
A first motor driven by electric power supplied from the first power storage device;
A second power storage device that is charged by receiving the supply of DC power obtained by AC-DC conversion of the other single-phase AC power of the two systems output from the Scott transformer;
A second motor driven by electric power supplied from the second power storage device;
A vehicle comprising: