JP2006296133A - Rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary electric machine with a structure in which a short circuit between terminals in a connector is not caused, even if foreign matters enter from an air breather mechanism. <P>SOLUTION: A fitting position of the connector 10 to a side wall portion 600A is arranged so that the position may be at an upper part than a fitting position of the air breather mechanism 20, by which even if the foreign matters such as impurities or the like enter a housing 600, and fall down through an inner face of the side wall portion 600A, the foreign matters are suppressed to reach the connector 10, for the air breather mechanism 20 is positioned at lower part than the connector. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rotating electrical machine mounted on a vehicle such as an electric vehicle, and more particularly to a rotating electrical machine having a structure that suppresses the influence of an intruding foreign matter.

  In recent years, an electric vehicle using an electric motor as a drive source and a so-called hybrid electric vehicle in which a rotating electric machine as a drive source and another drive source are combined have been put into practical use. In a rotating electrical machine used in such a vehicle, the inside of a housing in which elements constituting the rotating electrical machine are housed is in a high temperature and high pressure state. Under this high temperature and high pressure condition, an air breather mechanism for lowering the air pressure inside the housing is provided in the housing from the viewpoints of preventing damage to the oil seal and preventing deterioration of the insulating material. Generally, this air breather mechanism is mounted in the upper region of the housing. Such an air breather mechanism is disclosed in Patent Document 1 below.

  On the other hand, a connector is provided on the wall portion of the housing in order to supply power to the elements housed in the housing and exchange predetermined information signals with the outside. The element accommodated in the housing and the connector are connected by a cable, and the external connector attached to the cable provided outside is connected to the connector provided on the wall portion of the housing. Such connectors are disclosed in Patent Document 2 and Patent Document 3 below.

For example, a connector used in a resolver for detecting rotation of a rotating machine is usually attached to the central region of the side wall of the housing, and the air breather mechanism is attached to the upper region of the housing as described above. However, it has been found that when the connector and the air breather mechanism are arranged in such a positional relationship, a short circuit is likely to occur in the connector. This is because foreign substances (moisture, impurities, etc.) entering from the air breather mechanism fall down along the inner surface of the wall, enter into the connector located below the air breather mechanism, and accumulate with the accumulated amount and change over time. Short-circuit between them. In particular, when impurities such as a snow melting agent containing a relatively large amount of ionic components enter the housing and adhere to the terminals of the connector, the conductivity increases between the terminals and the terminals are short-circuited.
JP-A-9-182352 JP 2002-307724 A JP-A-9-112499

  The problem to be solved by the present invention is that when the connector is disposed below the air breather mechanism, a short circuit is likely to occur between the terminals inside the connector. Accordingly, an object of the present invention is to provide a rotating electrical machine having a structure that does not short-circuit between terminals inside a connector even when foreign matter enters from an air breather mechanism.

  In one aspect of the rotating electrical machine according to the present invention, a housing, an element accommodated in the housing, a wiring connected to the rotating electrical machine, a wiring provided in the housing, the wiring is connected, and an external A rotary electric machine comprising a connector for connecting to a wiring, wherein the housing is provided with an air breather mechanism for adjusting an internal pressure of the housing, and a mounting height position of the connector with respect to the housing is determined by the mounting position of the air breather mechanism. Same as or higher than the height position.

  In another aspect of the rotating electrical machine based on the present invention, a housing, an element accommodated in the housing, a wiring connected to the element, a wiring provided in the housing, the wiring is connected, and an external A rotating device including a connector for connecting to a wiring, wherein the housing includes a trunk portion that accommodates the element, and a pair of side wall portions that are opposed to each other with the trunk portion interposed therebetween. The connector is provided on the side wall portion, and an air breather mechanism for adjusting the internal pressure of the housing is provided on the other side wall portion.

  According to the rotating device based on the present invention, the mounting height position of the connector with respect to the housing is the same as or higher than the mounting height position of the air breather mechanism, or the connector is provided on one side wall, and the other The structure which provides an air breather mechanism in a side wall part is employ | adopted. As a result, even if foreign matter such as moisture or impurities enters the housing from the air breather mechanism and falls down along the inner wall surface, the air breather mechanism is the same as or below the connector, or the air breather mechanism Since it exists in the opposing surface of a connector, it becomes possible to suppress that a foreign material reaches | attains a connector. As a result, it is possible to prevent a short circuit of the terminals inside the connector due to the intrusion of foreign matter.

  In the following, an embodiment of a rotating machine based on the present invention will be described. In the following description, the “resolver” as an example of the “element” connected to the connector will be mainly described. However, the “element” to which the connector according to the present invention is connected is not limited to the “resolver”. The same idea can be applied to the “element”. For example, if it is a sensor, the idea of the present invention can be applied to a temperature sensor, an oil level sensor, a water level sensor, and the like.

  FIG. 1 is a diagram schematically showing an example of the structure of a drive unit including a connector and an air breather mechanism according to one embodiment of the present invention. In the example shown in FIG. 1, the drive unit 1 is a drive unit mounted on a hybrid vehicle, and includes a motor generator 100, a resolver 200, a speed reduction mechanism 300, a differential mechanism 400, a drive shaft receiving portion 500, A housing 600 and a terminal block 700 are included. The housing 600 includes a body portion 600C that houses elements such as the motor generator 100, the resolver 200, and the like described above, and a pair of side wall portions 600A and 600B that are disposed to face each other with the body portion 600C interposed therebetween. is doing.

  The motor generator 100 is a rotating electrical machine having a function as an electric motor or a generator. The motor generator 100 is a rotating shaft 110 that is rotatably attached to a housing 600 via a bearing 120, a rotor 130 that is attached to the rotating shaft 110, and a stator. 140. The rotor 130 includes a rotor core configured by laminating plate-like magnetic bodies such as iron or an iron alloy, and a permanent magnet embedded in the rotor core. For example, the permanent magnets are arranged at substantially equal intervals in the vicinity of the outer periphery of the rotor core.

  The stator 140 includes a ring-shaped stator core 141, a stator coil 142 wound around the stator core 141, and a bus bar 143 connected to the stator coil 142. Bus bar 143 is connected to PCU (Power Control Unit) 800 via terminal block 700 and power supply cable 800A provided on side wall portion 600A of housing 600. PCU 800 is connected to battery 900 via power supply cable 900A. Thereby, battery 900 and stator coil 142 are electrically connected.

  The stator core 141 is configured by laminating plate-like magnetic bodies such as iron or iron alloy. A plurality of teeth portions (not shown) and slot portions (not shown) as recesses formed between the teeth portions are formed on the inner peripheral surface of the stator core 141. The slot portion is provided so as to open to the inner peripheral side of the stator core 141.

  Stator coil 142 including three winding phases, U-phase, V-phase, and W-phase, is wound around the tooth portion so as to fit into the slot portion. The U phase, V phase, and W phase of the stator coil 142 are wound so as to deviate from each other on the circumference. Bus bar 143 includes a U phase, a V phase, and a W phase corresponding to the U phase, V phase, and W phase of stator coil 142, respectively.

  The power supply cable 800A is a three-phase cable including a U-phase cable, a V-phase cable, and a W-phase cable. U-phase, V-phase, and W-phase of bus bar 143 are connected to U-phase cable, V-phase cable, and W-phase cable in power supply cable 800A, respectively.

  The power output from the motor generator 100 is transmitted from the speed reduction mechanism 300 to the drive shaft receiving portion 500 via the differential mechanism 400. The driving force transmitted to the drive shaft receiving portion 500 is transmitted as a rotational force to a wheel (not shown) via a drive shaft (not shown), thereby causing the vehicle to travel.

  On the other hand, during regenerative braking of the hybrid vehicle, the wheels are rotated by the inertial force of the vehicle body. Motor generator 100 is driven via drive shaft receiving portion 500, differential mechanism 400 and reduction mechanism 300 by the rotational force from the wheels. At this time, the motor generator 100 operates as a generator. The electric power generated by motor generator 100 is stored in battery 900 via an inverter in PCU 800.

  The resolver 200 includes a resolver rotor 210 and a resolver stator 220. Resolver rotor 210 is connected to rotating shaft 110 of motor generator 100. The resolver stator 220 includes a resolver stator core 221 and a resolver stator coil 222 wound around the core. The resolver 200 detects the rotation angle of the rotor 130 of the motor generator 100. The detected rotation angle is transmitted to the PCU 800 via the connector 10. PCU 800 generates a drive signal for driving motor generator 100 using the detected rotation angle of rotor 130 and a torque command value from an external ECU (Electrical Control Unit), and uses the generated drive signal as a motor. Output to the generator 100.

  One side wall portion 600A of the side wall portion constituting the housing 600 is provided with an air breather mechanism 20 for adjusting the internal pressure of the housing in a substantially central region, and the connector 10 is provided in the vicinity of the terminal block 700 of the same side wall portion 600A. Is provided. As the air breather mechanism 20, various types can be adopted as long as it is a mechanism capable of releasing the internal gas (air) to the outside in accordance with an increase in the atmospheric pressure inside the housing. The connector 10 electrically connects the resolver 200 and the control device in the PCU 800, and the connector 10 connected to the resolver 200 by wiring is fixed to the side wall portion 600A. By connecting the connector 11 to which the external wiring connected to the PCU 800 is connected, the resolver 200 and the control device 830 are electrically connected.

  Here, in the present embodiment as described above, the mounting height position of the connector 10 with respect to the side wall portion 600 </ b> A of the housing 600 is arranged to be higher than the mounting height position of the air breather mechanism 20. Thereby, even if foreign matter such as moisture and impurities enters the housing 600 from the air breather mechanism 20 and falls along the inner surface of the side wall portion 600A, the air breather mechanism 20 is located below the connector 10. It is possible to suppress the foreign matter from reaching the connector 10. As a result, it is possible to prevent a short circuit between the terminals inside the connector 10 due to the entry of foreign matter.

  2 is a diagram schematically showing the attachment relationship between the connector 10 and the air breather mechanism 20 in the side wall portion 600A, and FIG. 2A is the relationship shown in FIG. 1, and the side wall portion 600A of the housing 600 is shown. The mounting height position of the connector 10 with respect to the air breather mechanism 20 is arranged to be higher than the mounting height position of the air breather mechanism 20. Further, in FIG. 2B, the mounting height position of the connector 10 with respect to the side wall portion 600A of the housing 600 is provided to be the same height as the mounting height position of the air breather mechanism 20. Thus, even if the mounting height positions of the connector 10 and the air breather mechanism 20 are the same, it is possible to prevent a short circuit between the terminals inside the connector 10 due to the entry of foreign matter.

  Further, another mounting height positional relationship between the connector 10 and the air breather mechanism 20 with respect to the housing 600 will be described with reference to FIGS. 3 to 5. Note that only the housing 600, the connector 10, and the air breather mechanism 20 are schematically illustrated, and other elements and the like are omitted so that the relationship between the mounting height positions can be clearly understood.

  FIG. 3 shows a case where the connector 10 and the air breather mechanism 20 are attached to the body portion 600 </ b> C of the housing 600. In FIG. 3A, the mounting height position of the connector 10 with respect to the body portion 600C of the housing 600 is arranged to be higher than the mounting height position of the air breather mechanism 20. 3B is the same as FIG. 3A, and shows a case where the connector 10 is attached to the top of the body 600C of the housing 600. FIG. 3C is the same as that in FIG. 3A, and shows a case where the air breather mechanism 20 is attached at a position where the connector 10 faces. Further, FIG. 3D shows that the air breather mechanism 20 is attached at a position where the connector 10 faces, and the attachment height position of the connector 10 with respect to the body 600C of the housing 600 is the same height as the attachment height position of the air breather mechanism 20. It is provided to be.

  Further, in the mounting form shown in FIG. 4, in the pair of side wall portions 600A and 600B arranged to face each other, the connector 10 is provided on one side wall portion 600B, and the air breather mechanism 20 is provided on the other side wall portion 600A. In this case, the mounting height positions of the connector 10 and the air breather mechanism 20 are not particularly limited.

  Further, the attachment form shown in FIG. 5 is that the connector 10 and the air breather mechanism 20 are attached at a predetermined distance (L) apart from each other along the axial direction of the body 600C in the region near the top of the body 600C of the housing 600. It has been. A preferable range of the distance (L) is at least about 200 mm. 5 illustrates the case where the connector 10 and the air breather mechanism 20 are mounted side by side in a region near the top of the trunk portion 600C, the distance (L) between the connector 10 and the air breather mechanism 20 is If it is 200 mm or more, you may attach both in any position.

  As described above, even when the mounting height positional relationship between the connector 10 and the air breather mechanism 20 with respect to the housing 600 as shown in FIGS. 3 to 5 is adopted, the connector 10 caused by the intrusion of foreign matter from the air breather mechanism 20. It is possible to prevent a short circuit between the internal terminals.

  Although the embodiments of the present invention have been described above, the embodiments disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows roughly an example of the structure of the drive unit containing the connector and air breather mechanism which concern on one embodiment of this invention. (A) And (B) is a figure which shows typically the attachment relationship of the connector and air breather mechanism in the side wall part of the housing in the drive unit which concerns on one embodiment of this invention. (A) to (D) are diagrams schematically showing a mounting relationship between a connector and an air breather mechanism in a body portion of a housing in a drive unit according to an embodiment of the present invention. It is a figure which shows typically the attachment relationship of the connector and air breather mechanism in the housing in the drive unit which concerns on one embodiment of this invention. It is a figure which shows typically the attachment relationship (distance) of the connector and air breather mechanism in the trunk | drum of the housing in the drive unit which concerns on one embodiment of this invention.

Explanation of symbols

  1 drive unit, 10 connector, 20 air breather mechanism, 100 motor generator, 110 rotating shaft, 120 bearing, 130 rotor, 140 stator, 141 stator core, 142 stator coil, 143 bus bar, 200 resolver, 210 resolver rotor, 220 resolver stator, 221 Resolver stator core, 222 resolver stator coil, 300 speed reduction mechanism, 400 differential mechanism, 500 drive shaft receiving portion, 600 housing, 600A, 600B side wall portion, 600C body, 700 terminal block, 800A, 900A power supply cable, 800 PCU, 900 battery .

Claims (3)

A rotating electrical machine comprising: a housing; an element housed in the housing; a wiring connected to the element; and a connector provided in the housing and connected to the wiring and connected to an external wiring. There,
The housing is provided with an air breather mechanism for adjusting the internal pressure of the housing,
The rotating electrical machine in which a mounting height position of the connector with respect to the housing is the same as or higher than a mounting height position of the air breather mechanism.   The rotating electrical machine according to claim 1, wherein the connector is provided on a top portion of the housing. A rotating electrical machine comprising: a housing; an element accommodated in the housing; a wiring connected to the element; and a connector provided in the housing and connected to the wiring and connected to an external wiring. There,
The housing includes a body portion that houses the element, and a pair of side wall portions that are disposed to face each other with the body portion interposed therebetween.
The connector is provided on the one side wall,
A rotating electrical machine in which an air breather mechanism for adjusting an internal pressure of the housing is provided on the other side wall.

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