EP4371221A1 - Moteur de convertisseur doté d'une résistance de freinage - Google Patents

Moteur de convertisseur doté d'une résistance de freinage

Info

Publication number
EP4371221A1
EP4371221A1 EP22738620.8A EP22738620A EP4371221A1 EP 4371221 A1 EP4371221 A1 EP 4371221A1 EP 22738620 A EP22738620 A EP 22738620A EP 4371221 A1 EP4371221 A1 EP 4371221A1
Authority
EP
European Patent Office
Prior art keywords
converter
braking resistor
circuit board
motor according
connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22738620.8A
Other languages
German (de)
English (en)
Inventor
Ralph Mayer
Franz Daminger
Steffen Klauck
Marc Stammberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SEW Eurodrive GmbH and Co KG
Original Assignee
SEW Eurodrive GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SEW Eurodrive GmbH and Co KG filed Critical SEW Eurodrive GmbH and Co KG
Publication of EP4371221A1 publication Critical patent/EP4371221A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/0094—Structural association with other electrical or electronic devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
    • H02K11/014—Shields associated with stationary parts, e.g. stator cores
    • H02K11/0141—Shields associated with casings, enclosures or brackets
    • 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
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
    • H02K2211/03—Machines characterised by circuit boards, e.g. pcb

Definitions

  • the invention relates to a converter motor with a braking resistor.
  • a converter motor has a converter which is integrated in a connection box of the electric motor of the converter motor and which supplies the stator windings of the electric motor with electrical power, so that the speed of the electric motor can be controlled or regulated.
  • the object of the invention is therefore to operate a converter motor with few errors.
  • the object is achieved with the converter motor according to the features specified in claim 1.
  • the converter motor has an electric motor with a terminal box, the terminal box being formed from a lower part and a cover placed thereon, a printed circuit board of the converter, in particular a printed circuit board of the converter equipped with signal electronics and power electronics converter, is fastened to the cover, in particular on the inside of the cover, with a braking resistor being thermally conductively connected to the lower part, in particular for dissipating the heat of the braking resistor to the lower part, and/or being fastened to the lower part, with a metal sheet, in particular metal sheet, is connected to the lower part, the braking resistor being arranged on the side of the sheet metal which is remote from the printed circuit board.
  • the advantage here is that the repercussions of the braking resistor on the electronics of the converter motor are minimized.
  • a metal sheet shields the braking resistor, in particular its high-frequency electromagnetic interference radiation, which is generated by the pulse width modulated operation of the controllable switch connected in series with the braking resistor.
  • the interference radiation acting on the signal electronics is thus reduced and, as a result, operation with little reaction, in particular operation with few errors, can also be ensured.
  • the converter has a rectifier whose DC voltage-side connection is connected to the DC voltage-side connection of an inverter of the converter, in particular a series circuit formed from a braking resistor and a pulse-width-modulated controlled switch from the connection on the DC voltage side of the rectifier and/or the inverter applied voltage is supplied.
  • a threshold value is exceeded, a further increase in the intermediate circuit voltage can be avoided by appropriately adapting the pulse-width-modulated actuation of the controllable switch. As the intermediate circuit voltage increases, the pulse width modulation ratio can also be changed accordingly.
  • the braking resistor has a semiconductor material or is designed as a semiconductor, ie in particular without wire winding, and/or the braking resistor is designed as a PTC braking resistor.
  • the advantage here is that there is no wire winding and therefore only a low inductance and therefore no low-frequency alternating magnetic field is generated by the braking resistor, so that interference with the signal electronics is prevented.
  • the braking resistor can be designed to be self-protecting if the heat flow cannot be dissipated quickly enough to the environment.
  • an embodiment made of wire i.e. not made of semiconductor material, but with a wire winding, would not only be able to be designed with a higher inductance, but would also be able to be overloaded for a short time, with the metal sheet also contributing to the dissipation of heat.
  • the converter feeds the electric motor.
  • the advantage here is that the speed can be controlled or regulated.
  • the converter is arranged in the connection box of the electric motor, in particular arranged in an integrated manner. The advantage here is that only a small installation space is required and the drive can be arranged decentrally in the field, i.e. without a control cabinet.
  • a further printed circuit board is arranged between a base part and a rear wall connected to the base part, the base part being accommodated in the lower part and being connected to the lower part.
  • the further printed circuit board is equipped with a connection, in particular with a connecting device, for supply lines of the braking resistor, the further printed circuit board being equipped with a connector part and the printed circuit board being equipped with a mating connector part, in particular with a mating connector part corresponding to the connector part.
  • the braking resistor can be electrically connected to the plug-in connector part, so that the braking resistor can be supplied with power via the plug-in connection.
  • the rectifier and the inverter can be arranged in the cover and the intermediate circuit voltage can be fed out to the braking resistor.
  • the supply lines are routed from the braking resistor to the connection.
  • the advantage here is that the braking resistor can be easily wired into the lower part and can only be operated when the cover is attached.
  • the metal sheet has two legs which are connected via a yoke area of the metal sheet, with the supply lines of the braking resistor being arranged on the side of one of the legs facing away from the printed circuit board. in particular wherein the braking resistor is arranged on the side of the yoke area facing away from the printed circuit board.
  • the advantage here is that the supply lines are routed in an elongated manner and the sheet metal shields interference from the electronics of the converter. This enables error-free operation of the converter. It is important that at least more than half the length, in particular more than 80%, of the supply lines laid from the braking resistor to the connection are shielded by the metal sheet. It is also important that the data lines and/or extra-low voltage lines that are routed from the outside through the screwed cable glands of the lower part into the connection box are arranged on the side of the sheet metal facing away from the braking resistor.
  • the metal sheet is designed as a particularly planar stamped and bent part.
  • the advantage here is that simple production is made possible.
  • the electric motor has a stator housing accommodating a stator of the electric motor, the vertical projection in the normal direction, in particular of the printed circuit board, the two legs and the yoke region delimiting the vertical projection in the normal direction, in particular of the printed circuit board, of an opening in the stator housing.
  • the metal sheet has such a hole pattern, in particular through holes arranged in such a way, that shield clamps can be fastened at different positions on the metal sheet, in particular the shield clamps being rotated by 90° or 180° relative to one another.
  • the advantage here is that depending on the respective design, the respective hole can be used for the respective shield clamp. thus the cable routing can be flexibly adjusted.
  • cable glands are arranged on three different sides of the lower part, it being possible for cables to be fed through cable glands in different directions, in particular from directions rotated by 90° or 180° with respect to one another. The advantage here is that the cable feed can be flexibly adapted and the shield clamps can still be arranged as close as possible to the cable glands.
  • holding sections are formed on the base part, which are pressed onto the lower part by means of screws.
  • a grounding plate is accommodated in one of the holding sections.
  • the advantage here is that an earth connection of the lower part can be achieved using two screws which protrude through the earthing plate and one of the holding sections and are screwed into threaded holes in the lower part.
  • the additional printed circuit board is equipped with a connection for low voltages and a connection for extra-low voltages as well as a connection for data transmission, with a low-voltage cable, an extra-low voltage cable and/or a data transmission cable being routed through at least one cable gland of the lower part and by means of at least one Shield clamp is fixed to the sheet metal, in particular wherein an exposed shield of the cable or one of the cables is electrically connected by means of the shield clamp to the sheet metal, in particular which is electrically connected to the lower part and/or the grounding plate.
  • the advantage here is that all of the connections can be connected via the plug-in connection to the printed circuit board, that is to say in particular to the electronics of the converter.
  • FIG. 1 shows an oblique view of a cut lower part 7, comprising a metal sheet 1, of a connection box of a converter motor according to the invention.
  • the converter motor is shown in section in an oblique view.
  • the sheet 1 is shown in an oblique view.
  • FIG. 4 shows the lower part with shield clamps (2, 40) in an oblique view.
  • the converter motor has an electric motor with a connection box, with a converter being arranged in an integrated manner in the connection box.
  • the electric motor has a stator housing 24 accommodating the stator windings, which is connected to a first bearing flange 25 and is connected to a second bearing flange 28, the first bearing flange 25 being spaced apart from the second bearing flange 28.
  • a bearing (26, 29) is accommodated in each of the bearing flanges (25, 28) for supporting a rotor shaft 27 of the electric motor.
  • stator winding wires are routed through an opening in the stator housing 24 into the interior space formed by the connection box, out of the area of the stator, and are electrically connected to a printed circuit board 21 via a plug-in connection that includes a plug-in connector part 11 .
  • the printed circuit board 21 is fastened to the cover 22 by means of screws and fitted with components, so that a converter comprising signal electronics and power electronics is arranged on the inside of the cover 22 .
  • the power semiconductors 23 are thermally conductively connected to the cover 22 itself. In this way, the heat loss of the power semiconductors 23 of the power electronics can be spread directly via the cover 22 and dissipated to the environment.
  • the voltage provided by the converter for the stator windings of the electric motor is passed on through the plug-in connection to the lower part 7, where contact is then made with the stator winding wires.
  • the mains supply of the converter is routed via a supply cable, in particular a three-phase current cable, through a cable gland arranged on the lower part 7 into the interior of the connection box.
  • the supply cable can be fixed to the cable using a shield clamp 2.
  • the lines, in particular phase lines and neutral conductors, of the supply cable are routed from the shield clamp 2 to a connection 8 for low voltage and are electrically connected there.
  • connection 8 is fitted on another printed circuit board, which is also fitted with a connector part 11, which is brought into electrical plug-in contact with a mating connector part fitted on the printed circuit board 21, in particular when the cover 22 is placed on the lower part 7.
  • the mains supply lines are routed electrically from the supply cable to the printed circuit board 21.
  • the AC-side connection i.e. AC voltage-side connection
  • the DC-side connection i.e. in particular DC voltage-side connection
  • the electric motor in particular the stator, feeds.
  • the supply lines required for this are in turn routed via the mating connector part 31 and the connector part 11 to the stator winding lines connected to the further printed circuit board.
  • the other printed circuit board is also equipped with a connection 14 for low voltages, in particular signal voltages and/or 24 volt supply, and a connection for data transmission.
  • the low-voltage lines and/or data lines that are brought in from the outside for this purpose are passed through screwed cable connections that are arranged in the lower part 7 and led to the connection 14 or to the connection for data transmission.
  • Shield clamps 2 connected to the plate 1 can also be used to fix the associated cables.
  • the voltage present at the connection of the rectifier on the DC voltage side is monitored by means of a sensor for detecting the voltage, in particular the intermediate circuit voltage.
  • a sensor for detecting the voltage, in particular the intermediate circuit voltage.
  • a braking resistor 20 is provided, which is connected in series with a controllable semiconductor switch and is supplied with this voltage. When the switch is closed, electrical power is dissipated to the braking resistor 20, which essentially converts it into heat.
  • the semiconductor switch is operated with pulse width modulation for precise control of the power dissipated.
  • the supply lines of braking resistor 20 carry high-frequency current components.
  • the braking resistor 20 is arranged in the lower part 7 in order to dissipate its heat.
  • the braking resistor 20 is thermally conductively connected to the lower part 7, in particular pressed onto a finely machined flat surface, in particular with interposed heat-conducting paste.
  • the braking resistor 20 is preferably attached to the bottom of the trough-shaped lower part 7 and is connected to the lower part 7 in a thermally conductive manner by the braking resistor 20 being pressed against a finely machined surface of the lower part 7 by means of screws.
  • the screws are screwed into threaded holes in the lower part 7 and press the braking resistor 20 against the surface with their screw heads.
  • the sheet metal 1 is fastened to the lower part 7 by means of screws, so that the braking resistor 20 is at a distance from the sheet metal 1 .
  • the braking resistor 20 is arranged between the metal sheet 1 and the lower part 7 .
  • the supply lines of the braking resistor 20 are cables routed from the braking resistor 20 to a connection 10 fitted on the further printed circuit board. There they are connected to electrical lines that lead to the printed circuit board 21 via the connector part 11 and the mating connector part 31 . One of the lines is connected to the upper potential of the connection of the rectifier on the DC voltage side, and the other line is connected to the lower potential of the connection of the rectifier on the DC voltage side.
  • the supply lines are arranged as far as possible in such a way that the metal sheet 1 is arranged between the supply lines and the printed circuit board 21 .
  • the metal sheet 1 thus shields the supply lines.
  • the sheet 1 is U-shaped.
  • the metal sheet 1 thus has two legs 30 which are connected to one another via a yoke region 32 .
  • the sheet metal 1 is fastened to the lower part by means of the screws, in particular with at least one of the screws protruding through a respective leg 30 .
  • the metal sheet 1 with its limbs 30 and its yoke area 32 borders the opening of the stator housing 24, through which the stator winding wires are led out of the area of the stator into the interior space formed by the terminal box.
  • the supply lines of the braking resistor 20 are routed from the printed circuit board 21, in particular viewed in the normal direction thereof, below the yoke area 32 and the legs 30, i.e. in particular on the side of the metal sheet 1 facing away from the printed circuit board 21.
  • the legs reach as far as possible to the connection 10 , so that the part of the supply lines that is not shielded by the sheet metal 1 is as short as possible.
  • the metal sheet 1 has such a hole pattern that the shield clamps (2, 40) can be fastened in three different positions. In FIG. 1, all three positions are occupied by shield clamps (2, 40). The three positions merge into one another with a rotation of 90° or 180°.
  • cables can be fed through the cable glands on three different sides of the lower part 7 and the shield clamps (2, 40) can then be attached to the respective position, so that the cable fed through the cable gland can be fixed as close and directly as possible to the shield clamp (2, 40). is.
  • the other printed circuit board is placed in a base part 12 which, by means of a rear wall 9 which is clip-connected to the base part 12, surrounds the further printed circuit board to form a housing.
  • the base part 12 and the rear wall 9 are made of plastic. In this way, protection against accidental contact is guaranteed.
  • the connections ( 8 , 10 , 14 , 13 ) protrude through the base part 12 .
  • Two holding sections (5, 15) spaced apart from one another are formed on the base part 12 and are fixed to the lower part 7 by means of screws.
  • a grounding plate is accommodated in a first holding section 15 of the two holding sections (5, 15), which is electrically conductively connected to the lower part 7 .
  • the grounding plate is designed as an L-shaped sheet metal angle and is soldered to one conductor track on the other printed circuit board.
  • an inwardly protruding dome area 3 is formed, which extends parallel to the normal direction of the printed circuit board 21, i.e. in particular also parallel to the direction of actuation of the connector part 11 and the mating connector part 31 formed connector.
  • a flat seal 16 is arranged between the lower part 7 and the cover 22 placed on the lower part 7 and has a tab 18 which is hooked into a recess, ie depression 17, of the dome area 3. In this way, the flat gasket 16 is on Lower part 7 fixed. Due to the recess, the rest of the dome area 3 has a nose against which the tab 18 rests.
  • the tab 18 is bent 90° out of the connection plane of the cover 22 with the lower part 7 .
  • the lower part 7 has a finely machined, flat peripheral edge area on which the flat seal 16 is placed, with the exception of the tabs 18 .
  • the lid also has a finely machined, flat peripheral edge area which is placed on the flat gasket 16 with the exception of the tabs 18 .
  • the flat gasket 16 defines the connecting plane of the cover 22 with the lower part 7 if the wall thickness of the flat gasket 16 is neglected.
  • the braking resistor is preferably made of PTC semiconductor material and is therefore self-protecting. Efficient heat dissipation is ensured by the sheet metal 1 and the metallic lower part 7, which surround the braking resistor on both sides or on all sides.
  • the braking resistor can be designed as a wire winding. It is then advantageous to make the metal sheet 1 from a material for shielding the magnetic field.
  • sheet metal 1 as aluminum sheet metal is suitable for shielding the alternating component of the magnetic field.
  • a ferromagnetic sheet metal is also advantageous, so that DC components of the magnetic field can also be kept away from the interior and the electronics, in particular the signal electronics, in particular the current sensors of the signal electronics.
  • the metal sheet 1 can also be designed as a composite part.
  • the aluminum sheet is materially bonded to the steel sheet.
  • the dome areas 3 projecting inwards on the lower part 7 are used for centering the metal sheet 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Thermal Sciences (AREA)

Abstract

La présente invention concerne un moteur de convertisseur doté d'une résistance de freinage, le moteur de convertisseur comprenant un moteur électrique avec un boîtier de jonction, le boîtier de jonction étant constitué d'une partie inférieure et d'un couvercle placé sur cette partie inférieure, une carte de circuit imprimé du convertisseur étant fixée au couvercle, une résistance de freinage étant connectée par conduction thermique à la partie inférieure et/ou étant fixée à la partie inférieure, une feuille métallique étant connectée à la partie inférieure, la résistance de freinage étant disposée sur le côté de la feuille métallique qui est opposé à la carte de circuit imprimé.
EP22738620.8A 2021-07-16 2022-06-27 Moteur de convertisseur doté d'une résistance de freinage Pending EP4371221A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021003694 2021-07-16
PCT/EP2022/067596 WO2023285127A1 (fr) 2021-07-16 2022-06-27 Moteur de convertisseur doté d'une résistance de freinage

Publications (1)

Publication Number Publication Date
EP4371221A1 true EP4371221A1 (fr) 2024-05-22

Family

ID=82458407

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22738620.8A Pending EP4371221A1 (fr) 2021-07-16 2022-06-27 Moteur de convertisseur doté d'une résistance de freinage

Country Status (5)

Country Link
US (1) US12587072B2 (fr)
EP (1) EP4371221A1 (fr)
CN (1) CN117529874A (fr)
DE (1) DE102022002303A1 (fr)
WO (1) WO2023285127A1 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19813639A1 (de) * 1998-03-27 1999-11-25 Danfoss As Leistungsmodul für einen Stromrichter
DK1735893T3 (da) * 2004-04-01 2008-11-24 Sew Eurodrive Gmbh & Co Elektromotor og serie af elektromotorer
DE102007034915B4 (de) * 2007-07-24 2011-01-05 Sew-Eurodrive Gmbh & Co. Kg Motoranschlusskasten und Umrichtermotor
DE102010021513B4 (de) 2010-05-26 2025-08-07 Sew-Eurodrive Gmbh & Co Kg Umrichtermotor
DE102010047762B4 (de) * 2010-10-08 2025-10-09 Sew-Eurodrive Gmbh & Co Kg Umrichtermotor, Umrichter und Kühlkörper
JP5624875B2 (ja) 2010-12-27 2014-11-12 日立オートモティブシステムズ株式会社 電力変換装置
CN204259352U (zh) * 2014-12-29 2015-04-08 宁波海得工业控制系统有限公司 一种伺服驱动器的散热器
JP6741379B2 (ja) * 2016-12-27 2020-08-19 株式会社キトー 三相・単相交流電源対応型電動巻上機
CN207069950U (zh) * 2017-08-04 2018-03-02 王伟 一种风冷式隔离型bldcm控制器结构
CN114144964B (zh) 2019-07-18 2023-11-07 索尤若驱动有限及两合公司 具有电机、变流器和布置在电机与变流器之间的中间件的驱动装置
DE102020005858A1 (de) 2019-10-21 2021-04-22 SEW-EURODRlVE GmbH & Co. KG Anordnung mit Elektrogerät, insbesondere Umrichter oder Wechselrichter, und Komponente
CN211127444U (zh) * 2019-12-31 2020-07-28 中国第一汽车股份有限公司 一种集成化电驱系统

Also Published As

Publication number Publication date
US12587072B2 (en) 2026-03-24
US20240305171A1 (en) 2024-09-12
WO2023285127A1 (fr) 2023-01-19
DE102022002303A1 (de) 2023-01-19
CN117529874A (zh) 2024-02-06

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