WO2019165523A1 - Máquina elétrica girante com canais trocadores de calor para ar e para líquido - Google Patents
Máquina elétrica girante com canais trocadores de calor para ar e para líquido Download PDFInfo
- Publication number
- WO2019165523A1 WO2019165523A1 PCT/BR2018/050056 BR2018050056W WO2019165523A1 WO 2019165523 A1 WO2019165523 A1 WO 2019165523A1 BR 2018050056 W BR2018050056 W BR 2018050056W WO 2019165523 A1 WO2019165523 A1 WO 2019165523A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- air
- air flow
- flow channel
- longitudinal
- channel
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
- H02K9/16—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle wherein the cooling medium circulates through ducts or tubes within the casing
Definitions
- the present invention relates to a rotating electric machine having a water jacket cooling system and an air direction that increases the heat exchange between an air flow channel and a water circulation channel. a water blanket cooling system.
- Electrical machines are widely known in the art and may comprise both electric motors and electric generators.
- a concern commonly associated with this type of machine is the need for a ventilation or cooling system, ie a system capable of dissipating the heat generated by the machine while maintaining its internal temperature within pre-set operating limits.
- Water-cooled, rotating electric machines are widely used in the industrial and marine industries due to their high power density and small dimensions. This is because the heat exchanger of the equipment is located around the electric machine by means of water flow channels, which form the so-called “water mantle”.
- the mantle comprises a metal housing consisting of a water flow layer, in longitudinal channels parallel to the main axis of the rotating electric machine or a helical channel that surrounds the entire length of the housing.
- water-cooled rotating electric machines feature a centrifugal fan in the front or rear of the machine, responsible for the internal air flow, and generally the machines have two longitudinal ducts that connect the air outlet of the internal fan of the electric machine with the air return at the end of the machine opposite the internal fan.
- these airflow ducts are not primarily intended to transfer heat to the water in the mantle.
- the main purpose of such airflow ducts is to equalize the internal air pressure of the electric machine by connecting the airflow duct by allowing the air to leave the internal fan until it returns. to the electric machine.
- such airflow ducts generally have adequate cross-sectional area to the air flow through it, without any concern for thermal exchange with the mantle water flow channels.
- the present invention achieves the above objectives by means of a rotating electric machine of the type comprising a housing housing a stator, a rotor concentric to the stator and disposed on a main axis of the machine, where a fan is also mounted, the a housing comprising a cooling system with at least one liquid flow channel and at least one longitudinal air flow channel configured to exchange heat with the liquid flow channel.
- the blower generates an air flow which is admitted in at least one air flow channel by a first air inlet end; and the at least one flow channel comprises at least one air guide arranged near the air inlet end of the air flow channel.
- the air director is arranged at a distance D from the air inlet end of the air flow channel, wherein the distance D measures about 30% of the longitudinal extent of the flow channel.
- the air flow channel may have two longitudinal sidewalls, the air directing may comprise a bulkhead disposed on one of the sidewalls.
- the bulkhead may comprise a trapezoidal plate.
- the air flow channel may comprise two air directing bulkheads, each of the bulkheads being arranged on one of the flow channel walls in a same longitudinal position with respect to the main axis of the machine.
- the housing may comprise a plurality of longitudinal liquid flow channels and a plurality of longitudinal air flow channels, wherein the liquid flow channels exchange heat with the longitudinal air flow channels.
- Figure 1 is a cross-sectional perspective view of a rotating electric machine comprising the cooling system according to the present invention, the machine being illustrated without the outer wall of the housing;
- Figure 2 is a cross-sectional view of the rotating electric machine comprising the cooling system according to the present invention, the machine being illustrated without the outer wall of the housing;
- FIG. 3 is a perspective view of the rotating electric machine comprising the cooling system according to the present invention, the machine being illustrated without the outer wall of the housing;
- Figure 4 - is a graphical representation of air flow flowing into an air flow channel of an electric machine without air driver.
- Figure 5 is a graphical representation of the air flow flowing into an air flow channel of an electric machine in accordance with the present invention.
- the rotating electric machine is an electric motor
- the cooling system of the present invention could be applied to any type of rotating electric machine.
- Figure 1 illustrates an electric motor of the type comprising a housing or housing 1 housing a stator 2, with a conductor winding system arranged axially along grooves in a ferromagnetic core, and a concentric rotor 3 to the stator.
- the rotor it rotates with a mainshaft 4 of the machine, the housing 1 being closed by covers 5,6 with openings for passage of the ends of the shaft.
- the operation of rotating stator and rotor electric machines is well known to those skilled in the art and therefore will not be described in detail here.
- the housing 1 is preferably of a metallic material and comprises a water jacket cooling system formed by water flow channels 7. Although the figure shows longitudinal channels parallel to the main axis of the rotating electric machine, the The water flow path could have another shape, such as a helical channel that encloses the entire length of the enclosure.
- the electric machine comprises a centrifugal fan 8 in the front region of the machine.
- a centrifugal fan 8 in the front region of the machine.
- the figure shows a front fan, use if a rear fan would also be possible.
- the cooling system comprises at least one air flow channel 9 disposed externally adjacent to the water flow channel, so that the air flow channel 9 performs a thermal exchange with the channel. 7.
- the water flow in channel 7 is shown in darker color and the air flow in channel 8 is shown in arrows.
- the housing comprises a plurality of longitudinal air flow channels 9 which are disposed adjacent to the plurality of longitudinal water flow channels 7.
- the present invention would also be functional with a single air flow channel in contact with one or more water flow channels. As shown in figures 1 and 2, the direction-changing air flow upon meeting the walls of the housing 1 will flow into the longitudinal air flow channels 9.
- the air upon entering the longitudinal channels the air may have an inclined direction relative to the direction of the machine's main axis, which may cause the flow to concentrate on a specific area of the channel 9.
- the system of the present invention includes one or more air directives 10 which deviate the flow direction, preventing it from concentrating on a specific channel area.
- air can enter air flow channel 9 already with an inclined direction relative to the machine's main axis 4, so it is interesting that air driver 10 is arranged near the end. where air inlet occurs in the air flow channel.
- Air driver positioning distance D (see figure 2) varies according to the operating conditions of the internal fan, such as rotation, dimensions and degree of inclination of its blades.
- the distance D is generally positioned in the region comprising 30% of the longitudinal length of the air flow channel 9, with reference to the end where the fan is located.
- the air guide 10 is a wall-mounted bulkhead 11 separating the flow channels 9.
- the bulkhead 10 is preferably in the shape of a trapezoidal plate, which extends transversely to the direction of the main axis 4.
- the trapezoidal shape makes the driver have greater transverse extension in the radially outermost region of the channel, which enables the passage of flow closer to the interface wall between channel 9 and channel 7.
- Each flow channel 9 may contain a single bulkhead 10, for example when the rotating electric machine has a single direction of rotation, or a bulkhead on each longitudinal wall, when the rotating electric machine is able to operate on both sides. clockwise and counterclockwise.
- the bulkheads 10 are in the same longitudinal position and opposite to the centerline of the air flow channel 9.
- Figures 4 and 5 show a graphical representation of air flow through a longitudinal air flow channel 9 in a water-cooled rotating electric machine.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/BR2018/050056 WO2019165523A1 (pt) | 2018-03-02 | 2018-03-02 | Máquina elétrica girante com canais trocadores de calor para ar e para líquido |
BR112020017503-0A BR112020017503B1 (pt) | 2018-03-02 | Máquina elétrica girante com canais trocadores de calor para ar e para líquido |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/BR2018/050056 WO2019165523A1 (pt) | 2018-03-02 | 2018-03-02 | Máquina elétrica girante com canais trocadores de calor para ar e para líquido |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019165523A1 true WO2019165523A1 (pt) | 2019-09-06 |
Family
ID=67805636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BR2018/050056 WO2019165523A1 (pt) | 2018-03-02 | 2018-03-02 | Máquina elétrica girante com canais trocadores de calor para ar e para líquido |
Country Status (1)
Country | Link |
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WO (1) | WO2019165523A1 (pt) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111313614A (zh) * | 2020-03-25 | 2020-06-19 | 宁波依诺汽车电子有限公司 | 一种外循环冷却新能源汽车永磁同步电机 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0072999A1 (de) * | 1981-08-28 | 1983-03-02 | Robert Bosch Gmbh | Elektrische Maschine, insbesondere Drehstromgenerator, mit innenliegenden Kühlkanälen |
US5077601A (en) * | 1988-09-09 | 1991-12-31 | Hitachi, Ltd. | Cooling system for cooling an electronic device and heat radiation fin for use in the cooling system |
DE19635196A1 (de) * | 1996-08-30 | 1998-03-12 | Audi Ag | Kühlanordnung für einen Elektromotor |
WO2008059687A1 (fr) * | 2006-11-17 | 2008-05-22 | Kabushiki Kaisha Yaskawa Denki | Moteur rotatif |
WO2010115539A1 (de) * | 2009-04-08 | 2010-10-14 | Sew-Eurodrive Gmbh & Co. Kg | Elektromotor |
US20140308889A1 (en) * | 2011-11-11 | 2014-10-16 | Toyota Jidosha Kabushiki Kaisha | Register |
US20150097450A1 (en) * | 2012-04-10 | 2015-04-09 | Zhihai Xu | System and method for cooling an electric motor |
-
2018
- 2018-03-02 WO PCT/BR2018/050056 patent/WO2019165523A1/pt active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0072999A1 (de) * | 1981-08-28 | 1983-03-02 | Robert Bosch Gmbh | Elektrische Maschine, insbesondere Drehstromgenerator, mit innenliegenden Kühlkanälen |
US5077601A (en) * | 1988-09-09 | 1991-12-31 | Hitachi, Ltd. | Cooling system for cooling an electronic device and heat radiation fin for use in the cooling system |
DE19635196A1 (de) * | 1996-08-30 | 1998-03-12 | Audi Ag | Kühlanordnung für einen Elektromotor |
WO2008059687A1 (fr) * | 2006-11-17 | 2008-05-22 | Kabushiki Kaisha Yaskawa Denki | Moteur rotatif |
WO2010115539A1 (de) * | 2009-04-08 | 2010-10-14 | Sew-Eurodrive Gmbh & Co. Kg | Elektromotor |
US20140308889A1 (en) * | 2011-11-11 | 2014-10-16 | Toyota Jidosha Kabushiki Kaisha | Register |
US20150097450A1 (en) * | 2012-04-10 | 2015-04-09 | Zhihai Xu | System and method for cooling an electric motor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111313614A (zh) * | 2020-03-25 | 2020-06-19 | 宁波依诺汽车电子有限公司 | 一种外循环冷却新能源汽车永磁同步电机 |
Also Published As
Publication number | Publication date |
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BR112020017503A2 (pt) | 2020-12-22 |
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