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Author

Matthias Maschke

Bio: Matthias Maschke is an academic researcher from ebm-papst. The author has contributed to research in topics: Stator & Rotor (electric). The author has an hindex of 7, co-authored 33 publications receiving 140 citations.

Papers
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Patent
Best Dieter1, Matthias Maschke1
29 Jan 2010
TL;DR: In this paper, a stator unit for an electric motor, in particular an external rotor motor, is described, and a sealing disk is arranged between the stator and the housing flange, which is designed in such a way that direct and indirect sealing of the through-openings and/or the fastening holes is provided.
Abstract: A stator unit for an electric motor, in particular an external rotor motor, includes a stator with a stator laminate stack and stator windings and a stator bushing and a stator flange which is formed at one end. A housing flange of a housing for accommodating a motor controller or the like is fastened on the stator flange, and with motor connection contacts, which run from the stator through through-openings in the housing flange, and with fastening means, which run through fastening holes in the housing flange and are fastened in the stator. A sealing disk is arranged between the stator and the housing flange. The sealing disk has sealing regions made from elastic plastic, which are arranged and designed in such a way that direct and/or indirect sealing of the through-openings and/or the fastening holes is provided against the ingress of moisture.

18 citations

Patent
04 Apr 2007
TL;DR: In this paper, the layout of at least one contact in a housing (4) with an electronic component installed with component leads (24), especially a power semiconductor (24) on a cooling surface (26), is described.
Abstract: The current invention relates to the layout of at least one contact in a housing (4) with an electronic component installed with component leads (24), especially a power semiconductor (24) on a cooling surface (26) and a spring component(2) with at least one spring arm (10) that can be mounted into a housing (4) whereby when the spring arm(10) of the spring component(2) is in a position to apply pressure, it presses the component (24) against the cooling surface (26). The spring component (2) can be inserted into the housing (4) without contacting the component (24) and the housing (4) is constructed with holding contacts (46a, 46b) for the spring element (2) in such a way that no shearing or transverse forces are generated in the lengthwise direction of the component leads during the mounting of the spring component (2). The invention also relates to a spring component (2) for use in a layout in accordance with the invention as well as electronic housing (4) for use in a layout in accordance with the invention.

16 citations

Patent
16 Dec 2011
TL;DR: In this article, a diffuser for a fan of axial, radial, or diagonal construction, having an inlet opening (10) and an outlet opening (20) for a gaseous medium flowing through diffuser interior (I) enclosed by an outer housing (30) in an axially directed main flow direction (S), was presented.
Abstract: The invention relates to a diffuser (3) for a fan (2) of axial, radial, or diagonal construction, having an inlet opening (10) and an outlet opening (20) for a gaseous medium flowing through a diffuser interior (I) enclosed by an outer housing (30) in an axially directed main flow direction (S) from the inlet opening (10) to the outlet opening (20), wherein the cross section (21) of the outlet opening (20) is greater than the cross section (11) of the inlet opening (10) and the cross section of the diffuser interior (I) increases from the cross section (11) of the inlet opening to the cross section (21) of the outlet opening (20), wherein the outer housing (30) forms an outer diffuser part (AD) bounding the diffuser interior (I) on the outside. In order to achieve improvement of the operating behavior with respect to efficiency and noise, according to the invention the cross section of the outer diffuser part (AD) transitions along the main flow direction (S) from a circular cross section (31) at the inlet opening (10) to a non-circular cross section (32) at the outlet opening (20).

15 citations

Patent
01 Feb 2003
TL;DR: In this article, a stator for an electric motor, particularly for a high-performance low voltage motor of the external rotor type, is described, where the stator is equipped with a number of stator slots (6) and stator teeth (4).
Abstract: The invention relates to a stator (1) for an electric motor, particularly for a high-performance low voltage motor of the external rotor type. Said stator comprises a stator core assembly (2) with a number of stator slots (6) and stator teeth (4) for accommodating stator windings (8), and an interconnection assembly (20) for interconnecting winding wires (18) of the stator windings (8). The stator windings (8), which are wound around the stator teeth (4) though the stator slots (6) project, on both faces (10, 12), above the stator core assembly (2) with a winding head (16). The interconnection assembly (20) is comprised of winding contact elements (22, 22a, 52) and of interconnection contact elements (24, 54), whereby at least the interconnection contact elements (24, 54) are arranged, on one face (10) of the stator core assembly (2), essentially inside a space, which is limited by the stator windings (8) and by a plane (26) defined by the winding head (16). The winding contact elements (22, 22a, 52) are assigned to the stator teeth (4) or to the stator slots (6) as winding supporting points that are fixed on the stator whereby enabling the stator windings (8) to be wound in a continuous winding process onto the stator teeth (4) and each time with the winding wires (18) via the winding contact elements (22, 22a, 52). Each interconnection element (24, 54) electrically connects a stipulated group (I, II,III; M) of the winding contact elements (22, 22a, 52) to one another.

15 citations

Patent
29 Jan 2009
TL;DR: The stator unit has a stator which is formed from a stators laminate stack with stator windings and stator bushing (3), and a sealing disk (31) is arranged between the stator flange and the housing flange as mentioned in this paper.
Abstract: The stator unit has a stator (1) which is formed from a stator laminate stack with stator windings (4) and stator bushing (3). A metallic bushing (5) is pressed into interior of laminate stack and has domes for fitting on the housing flange (12) that is connected directly to a stator flange (9). A sealing disk (31) is arranged between the stator flange and the housing flange. The sealing disk has sealing regions made from elastic plastic, which are arranged and designed such that direct and/or indirect sealing of through-openings and/or fastening holes is provided against ingress of moisture.

11 citations


Cited by
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Patent
15 Dec 2011
TL;DR: In this article, a valve leakage test is performed on a valve assembly including a valve body with a first valve and a second valve, where the valves may be positioned across a fluid path in the valve body and an intermediate volume between the valves.
Abstract: This disclosure relates generally to valves, and more particularly, to gas valve assemblies. In one example, a valve leakage test may be performed on a valve assembly including a valve body with a first valve and a second valve, where the valves may be positioned across a fluid path in the valve body with an intermediate volume between the valves. A pressure sensor may be in fluid communication with the intermediate volume and may sense a measure that is related to the pressure in the intermediate volume. The pressure sensor may communicate with a controller to determine a measure that is related to a pressure change in the intermediate volume and compare the measure that is related to a pressure change to a first and/or second threshold value. The controller may output a signal if the measure meets and/or exceeds the first and/or second threshold value.

26 citations

Patent
10 Dec 2012
TL;DR: In this paper, a valve assembly may be configured to perform a valve proving test as part of an operational cycle of a combustion appliance coupled to the valve assembly, and the valve controller may then output a signal if the measure related to a pressure change rate in the intermediate volume meets and/or exceeds a threshold value.
Abstract: This disclosure relates generally to valves, and more particularly, to gas valve assemblies. In one example, a valve assembly may be configured to perform a valve proving test as part of an operational cycle of a combustion appliance coupled to the valve assembly. The valve assembly may include a valve body having a fluid path, first and second valve sealing members translatable between an opened position and a closed position, and one or more pressure sensors in fluid communication with an intermediate volume of the fluid path between the first and second valve sealing members. A valve controller may be in communication with the pressure sensor and may monitor a measure related to a pressure change rate in the intermediate volume. The valve controller may then output a signal if the measure related to a pressure change rate in the intermediate volume meets and/or exceeds a threshold value.

25 citations

Patent
19 Aug 2004
TL;DR: Fan apparatus for an air conditioner including a fan (50), a shaft (68) coupled to the fan, a rotor (60) for transmission of driving force to the shaft, a stator (65) on an inside of the rotor, and a fan housing (40) for enclosing the fan.
Abstract: Fan apparatus for an air conditioner including a fan (50), a shaft (68) coupled to the fan (50), a rotor (60) for transmission of driving force to the shaft (68) for rotating the fan (50), a stator (65) on an inside of the rotor (60) to form a BLDC motor together with the rotor (60), and a fan housing (40) for enclosing the fan (50), thereby reducing noise and enhancing fan (50) efficiency.

25 citations

Patent
15 Dec 2011
TL;DR: In this article, a valve assembly may include a valve body having an interior and an exterior, a valve or valve sealing member positioned in the valve body, a sensor element (e.g., a magnet and/or a ferrous core) secured relative to the valve sealing members and a sensor (i.e., a magnetic field sensor) positioned outside of the interior of the valve assembly.
Abstract: This disclosure relates generally to valves, and more particularly, to gas valve assemblies. In one illustrative but non-limiting example, a valve assembly may include a valve body having an interior and an exterior, a valve or valve sealing member positioned in the valve body, a sensor element (e.g., a magnet and/or a ferrous core) secured relative to the valve sealing member and a sensor (e.g., a magnetic field sensor) positioned outside of the interior of the valve body. The valve sealing member may be movable between an opened position and a closed position, and the sense element may move with the valve sealing member. The sensor may be configured to detect a position of the valve sealing member and communicate that position to a valve controller.

22 citations

Patent
01 Jun 2006
TL;DR: In this paper, a stator of an external rotor motor is represented by a single or multi-strand stator winding and axially beside each other on the end face of the stator.
Abstract: Die vorliegende Erfindung betrifft einen Stator (2) eines Elektromotors, insbesondere eines Ausenlaufermotors, mit einer aus einer Anzahl von Statorspulen (a bis 1) gebildeten ein- oder mehrstrangigen Statorwicklung und einer an einer Stirnseite (14) des Stators (2) angebrachten Verschaltungsanordnung mit uber Leiterbrucken (44) verbundenen, jeweils einem Wicklungsstrang (U, V, W) zugeordneten Wicklungskontaktelementen (42), die als Wickelstutzpunkte zwischen den Statorspulen (a bis I) die Statorwicklung kontaktieren. The present invention relates to a stator (2) of an electric motor, in particular an external rotor motor, formed with one of a number of stator coils (a to 1) single or multi-strand stator winding and on one end face (14) of the stator (2) mounted interconnection with via conductor bridges (44) connected, in each case one winding phase (U, V, W) associated winding contact elements (42), the contact points between the winding as the stator coils (a to I), the stator winding. Die einander zugeordneten Wicklungskontaktelemente (42) und die Leiterbrucken bilden ein einteiliges Verschaltungselement in Form eines Ringsegments, in welcher n, n = 2, 3..., Wicklungskontaktelemente (42) durch (n-1) teilkreisformig gebogene Leiterbrucken verbunden sind und diese Verschaltungselemente axial nebeneinander auf der Stirnseite (14) des Stators (2) angeordnet sind. The associated winding contact elements (42) and the conductor bridges form a one-piece interconnection element in the form of a ring segment, in which n, n = 2, 3 ..., winding contact elements (42) are connected by (n-1) part-circular curved conductor bridges and this interconnection elements axially beside each other on the end face (14) of the stator (2) are arranged.

22 citations