Showing papers by "ebm-papst published in 2005"

Stator for an electric motor

Abstract: The present invention pertains to a stator for an electric motor, composed of a stator core assembly (2), stator windings (3) and, arranged at one end of the stator core assembly (2), an interconnecting arrangement (4) for the stator windings (3). An interconnecting arrangement (4) features an insulating part (9) with slotted chambers (11) in order to accept electrical connecting leads (12), insulated from each other, in order to interconnect the wire ends (7) of the stator windings (3).

Fan motor with digital controller for applying substantially constant driving current

Abstract: An improved fan arrangement features a radial or diagonal fan ( 370 ) with which a direct current motor ( 32 ) is associated as its drive motor, further comprising a digital control element ( 23, 24 ) which executes a program, for controlling the current flowing through the direct current motor ( 32 ), which program is so configured that it applies a substantially constant current in the motor ( 32 ) in the working rotation speed range of the fan.

Method for sensorless operation of an electronically commutated motor and motor for carrying out such a method

Abstract: A method of determining the rotational direction of an electronically commutated motor with a multiphase stator and permanent magnet rotor comprises finding the course of the induced voltage in a momentary current-less phase, or at a transistor, by finding characteristic values at at least two positions and thus finding the direction. Independent claims are also included for the following: (A) a motor for the above method;and (B) a method of sensor-less control of the commutation.

Arrangement with an electric motor

Abstract: An arrangement with an electric motor facilitates mounting of the motor, particularly of a miniature or subminiature motor. The motor (20) has a stator (56), a rotor (24), and a support flange (36) coupled to the motor. A motor mount (22) is formed with an opening (94) for engagement with the support flange (36). The opening has, on its rim, a motor-side shoulder (96) that has a substantially frustoconical shape and faces axially toward the motor (20) after mounting. The support flange (36) is shaped for guidance of a snap-lock element (82) that extends along at least a portion of the circumference of the support flange (36) and is resiliently deflectable radially inward, by means of an inwardly directed force. The snap-lock element (82) is so configured that it snap-locks outward against the motor-side shoulder (96) of the opening (94) when the motor is mounted.

Assembly used for cooling a circuit board or similar

Abstract: Disclosed is a supporting frame (104) that is to be mounted on a printed circuit board (2), is embodied like a drilling rig, and comprises a platform (117) which is provided with supporting legs (105, 106, 107, 108) for fixing the same to the circuit board (2). The center of the platform (42) of the supporting frame (104) encompasses a depression (121, 123) which is configured for assembling a fan (3) at a distance from the circuit board (2). The outer wall (123) of the depression (121, 123) forms part of the fan.

Method for regulating and controlling a firing device and a firing device

Abstract: A method is proposed for regulating a firing device taking into account the temperature and/or the burner load, in particular with a gas burner, comprising the regulation of the temperature (T actual) produced by the firing device using a characteristic which shows a value range corresponding to a desired temperature (T desired) dependent upon a first parameter (m L, V L) corresponding to the burner load (Q), wherein when representing the characteristic, a second parameter, preferably the air ratio (.lambda.), defined as the ratio of the actually supplied quantity of air to the quantity of air theoretically required for optimal stoichiometric combustion, is constant.

Electric motor having a high degree of protection against the ingress of foreign particles and moisture

Abstract: The present invention relates to an electric motor having a high degree of protection against the ingress of foreign particles and moisture, in particular an electronically commutated external rotor DC motor, having a stator ( 1 ), having a rotor ( 2 ) and having an electronics housing ( 6 ) which extends transversely with respect to the motor shaft ( 3 ) and accommodates in its interior ( 4 ) a printed circuit board ( 5 ) having open-loop and closed-loop control electronics and commutation electronics. In this case, connection openings ( 6 c ) are located in a base ( 6 b ) of the electronics housing ( 6 ), connection elements ( 7 ), which connect the stator ( 1 ) and the printed circuit board ( 5 ) to one another, passing through the connection openings ( 6 c ), and a seal ( 8, 8 a , 8 c , 8 e , 11, 12, 18, 24 ) seals at least the connection openings ( 6 c ) in the base ( 6 b ) of the electronics housing ( 6 ) through which the connection elements ( 7 ) pass. The seal ( 8, 8 a , 8 c , 8 e , 11, 12, 18, 24 ) comprises a plate like partition wall ( 8 ) which is arranged on the base ( 6 c ) of the electronics housing ( 6 ) and serves the purpose, on the one hand, of physically sealing the electronics housing ( 6 ) and, on the other hand, of sealing the gaps in the electronics housing ( 6 ).

Radial fan impeller

Abstract: A radial fan impeller has the following features: a plurality of blades distributed around the periphery; viewed in the radial direction, the blades extend from an inner inlet region to an outer discharge region; the blades extend axially, viewed in the direction of a rotation axis, between an inlet side and an axially opposite hub side; on the inlet side, the blades are connected by means of their radial extension as far as the discharge region to a covering disc which has a central inflow opening, opening out into the inlet region; on the hub side the blades are only connected with their radial inner end regions to a central hub; the blades and the covering disc define an outer fan impeller diameter which is at least ten times an axially measured flow discharge width of the blades provided in the discharge region.

Method for regulating and controlling a firing apparatus and firing apparatus

Abstract: Disclosed is a method for regulating a firing apparatus by taking into account the temperature and/or the burner load, especially in a gas burner. According to said method, the temperature (Tist) generated by the firing apparatus is regulated using a characteristic curve which represents a value range corresponding to a setpoint temperature (Tsoll) in accordance with a first parameter (mL, VL) that corresponds to the burner load (Q). A second parameter, preferably the excess air coefficient ( ), which is defined as the ratio between the actually delivered quantity of air and the quantity of air theoretically required for optimal stoichiometric combustion, is constant when representing the characteristic curve.

Method for adjusting the excess air coefficient on a firing apparatus, and firing apparatus

Abstract: The temperature generated by a firing apparatus, particularly a gas burner, depends on the mixing ratio between the quantity of air and the quantity of gas fed to the firing apparatus, characterized by the excess air coefficient λ, at a predefined burner load (air mass flow rate) in such a way that the temperature generated by the firing apparatus reaches a maximum when λ=1. According to the inventive method for adjusting the excess air coefficient, said maximum temperature Tmax is determined, whereupon the desired setpoint value λhy of the excess air coefficient is adjusted and the associated setpoint temperature Tsoll is measured. A characteristic curve which represents the correlation between the respective air mass flow rates and the setpoint temperatures at the setpoint value λhy of the excess air coefficient and allows combustion to be regulated to an optimal hygienic state can be determined from said determined correlation between the setpoint temperatures Tsoll at different predefined burner loads. The inventive firing apparatus is adapted to carry out said method and especially comprises a mass flow sensor in the air delivery zone as well as a temperature sensor in the effective range of the burner flame.

Assembly for transporting fluid

Abstract: The invention relates to an assembly for transporting fluid, comprising an electronically commutated motor with an external rotor (20). Said motor comprises a stator (22) that is located on a stator support (34) and a rotor (26) that is connected to a first permanent magnet (67), the rotor being rotatably mounted in relation to the stator (22) in a bearing tube (30). The bearing tube (30) is located in at least a partially radial manner inside the stator support. The first permanent magnet (67) is located in an intermediate space between the stator support (34) and the bearing tube (30). A fluid pump (84) has a transport wheel (90) that is rotatably mounted inside a pump housing (86) and that is connected to a second permanent magnet (92). A fluid-tight, magnetically transparent partition (82) is provided between the first and second permanent magnets. The first permanent magnet (67) forms a magnetic coupling for the fluid pump (84) by co-operating with the second permanent magnet (92), said magnetic coupling automatically initiating a rotation of the transport wheel (90) during the rotation of the rotor (26).

Protective circuit for reducing electrical disturbances during operation of a DC motor

Abstract: A protective circuit, for reducing electrical disturbances or interference during operation of a DC motor, features a series transistor ( 62 ) arranged in a supply lead from a DC voltage source ( 12 ) to a DC motor; an auxiliary voltage source ( 52 ), associated with that series transistor, having a substantially constant auxiliary voltage which is configured to make the series transistor ( 62 ) fully conductive when a supply voltage furnished by the DC voltage source is substantially free of electrical interference; and an analyzer circuit ( 32, 34, 36 ) for analyzing the supply voltage, which analyzer circuit is configured, upon the occurrence of electrical interference in the supply voltage, to increase the resistance of the series transistor ( 62 ) correspondingly, in order to reduce the influence of that electrical interference on the operation of the DC motor.

Method and arrangement for cooling a substrate, especially a semiconductor

Abstract: The invention relates to a method whereby a coolant (52) is compressed (32) in a refrigeration cycle, condensed by cooling in a capacitor (44), relaxed in a throttle valve (62), and supplied to an evaporator (60) in the relaxed state in the form of wet steam (52), said evaporator being connected to a substrate (12) to be cooled in a thermoconducting manner. The cooling process thus operates as a liquid cooling process, but with a higher average logarithmic temperature difference of the heat transfer, enabling lower temperatures of the substrate (12) to be reached and a better heat transition coefficient, as the coolant is in the form of wet steam. The invention also relates to a corresponding arrangement.

Method And Arrangement For Controlling The Electricity Supply Of An Electronically Commutated Motor

Abstract: A control circuit (150) for controlling the electricity supply of a winding phase (102) in an electric motor (134). The control circuit (150) comprises a semiconductor switch (106) and a control unit (108) for controlling the semiconductor switch. The semiconductor switch (106) is connected to the winding phase (102) in order to control the electricity in said winding phase. The control unit (108) comprises an output (110) for the provision of a control signal (CTRL) for the semiconductor switch (106) and is configured in such a way that enables the output to be set to high-impedance, at least when the semiconductor switch (106) is disconnected, in order to prevent the signal from being influenced by the output (110) of the semiconductor switch (106) during the disconnection process.

Slide caliper assembly and method of use

Abstract: A slide caliper assembly comprises a caliper including a shaft defining a gaging surface. A first jaw is coupled to and a second jaw is slidably coupled to the shaft. Each jaw defines a gaging surface. One of the jaws is adjustably pivotable relative to the shaft about a pivot axis coinciding with an intersection of the gaging surface of the shaft and another axis extending along the associated gaging surface of one of the jaws. A case houses the caliper, and has a plurality of side edge sections defining a periphery of the case. One side edge section and an adjacent side edge section form a non-right angle therebetween such that the shaft can abut the side edge section, the first jaw can abut an adjacent side edge section, and the second jaw can abut another adjacent side edge section for calibrating or demonstrating the use of the caliper.

Arrangement with an electronically commutated external rotor motor

Abstract: The invention relates to an arrangement with an electronically commutated external rotor motor (20), comprising an inner stator (22), arranged on a bearing tube (30), separated from an external rotor (26; 92) by a first air gap (24), comprising a rotor bell housing (40), open at one end and connected to a shaft (46) at the other end, mounted in the bearing tube (30), further comprising a permanent magnet arrangement (76), arranged at the open end of the rotor bell housing (40), for interaction with a second permanent magnetic rotor (92), mounted in the arrangement such as to be able to rotate, said permanent magnet arrangement (76) being separated from said second rotor (92) by a second air gap and forming a magnetic coupling (94) therewith, such that a rotation of the permanent magnet arrangement (76) causes a rotation of said second rotor (92). The above also comprises a non-ferromagnetic separating element (82), arranged in the second air gap which separates the second rotor (92) from the external rotor motor (20) in a liquid-tight manner and on which an arrangement for mounting the second rotor (92) and the bearing tube (30), for mounting the shaft (46) of the rotor bell housing (40), are arranged.

Arrangement for conveying fluids

Abstract: Disclosed is an arrangement for conveying fluids, comprising a fluid pump (174) with a rotatably mounted impeller (172) that is connected to a first permanent magnet (186). Said arrangement further comprises an electronically commutated inner rotor motor (152) with a stator (154) and a rotor (156) as well as a shaft (160) that is assigned to the rotor (156) and is rotatably mounted relative to the stator (154). The inventive arrangement also comprises a second permanent magnet (184) which is connected to the rotor (156) in a torsion-proof manner and cooperates with the first permanent magnet (186) like a magnetic clutch, and a split pot (170, 180, 188) that fluid-tightly separates the first permanent magnet (186) located within said split pot from the second permanent magnet (184) located outside the split pot. One of the bearings (164) of the rotor (156) shaft is disposed outside on the split pot. A support system (204) for another bearing (162) of said shaft (160) is joined to the stator (154). A fan wheel (218) is connected in a torsion-proof fashion to a final area (214) of the shaft (160) that faces away from the split pot.

Impeller, in particular for an axial fan

Abstract: An impeller for an axial fan of the type adapted to be pressed onto a rotating rotor comprising a number of blades. The blades protrude radially outward from a substantially tubular hub, which carries the blades and is adapted to be pressed onto the rotating rotor. A substantially cylindrical blank is arranged inside the hub where the blank forms alternately arranged first and second portions. The first portions have a greater inside diameter than the inside diameter of the second portions.

Fluid transporting device

Abstract: The inventive fluid transporting device is provided with a rotary fluid pump (91) comprising a pump wheel (90) connected to a fist constant magnet (92). In addition, said device is provided with an electronically switchable internal rotor motor (70) comprising a stator (68) containing the rotor (60) which is mounted therein and is connected to a second constant magnet (76, 140) interacting with the first constant magnet (92) in a magnetic coupling manner. The inventive device also comprises a space cup (52) which divides in a fluid sealed manner the first constant magnet (92) of the magnetic coupling (93) disposed inside said cup (52) from the second constant magnet (76, 140) disposed outside thereof, wherein the stator (68) of the internal rotor motor (70)is placed substantially on the same drive plane as the magnetic coupling (93) and radially outside thereof.

Motor, especially for low voltage

Abstract: A motor, especially for low voltage, comprises rotor and stator with an air gap (180) with projecting stator poles (44-54) having cores and shoes and separated by grooves (61-66) holding U-shaped stator coils on the cores. A U-shaped piece touches the pole cores and has outer insulated guide recesses to stop coils contacting poles or one another. An independent claim is also included for a vehicle having a drive motor as above.

Electric motor for auto, has stator with slotted lamination stack having end face including set of annular shaped jumper rings and neutral ring, where neutral ring has radial projections extending along preset stator teeth to head

Abstract: The motor has a stator with a slotted lamination stack for defining a set of slots that are separated by teeth The lamination stack includes an end face with a set of annular shaped jumper rings (11-13) and neutral ring (14) The neutral ring includes a set of radial projections which extend along predetermined stator teeth to the head, insulated from the teeth The projections have free ends for contacting partial windings

Method and arrangement for controlling the synchronous running of a plurality of electronically commutated motors

Abstract: A method of controlling synchronous running of a plurality of electronically commutated motors ( 22, 24, 26 ), each of which includes a stator having a stator winding ( 40, 42, 44 ), a permanent-magnet rotor ( 28, 30, 32 ), and at least one arrangement ( 34, 36, 38 ), associated with the respective motor, for sensing its rotor position and for generating a rotor position signal (H 1 , H 2 , H 3 ). Also provided is an energization arrangement ( 46 ), to which the stator windings ( 40, 42, 44 ) of the motors are connected. The method includes the steps of detecting occurrence of a predetermined state of the rotor position signals (H 1 , H 2 , H 3 ) and, in response thereto, triggering simultaneously commutation of the currents in all the motors.

Motor, insbesondere für Niederspannung

Abstract: Ein Motor (40), der insbesondere fur Niederspannung bestimmt ist, hat einen Rotor (43) und einen Stator (42). Letzterer ist vom Rotor (43) durch einen Luftspalt (180) getrennt, und er hat ausgepragte Statorpole (44 bis 54), die jeweils einen Polkern und einen Polschuh haben und voneinander durch Nuten (61 bis 66) getrennt sind. Der Stator (42) hat eine Statorwicklung (68), welche Spulen (70, 74, 78, 82, 84, 88) aufweist, die auf den Polkernen angeordnet sind und U-formige Elemente aufweisen, deren Leitungsquerschnitt zumindest uberwiegend von der Kreisform abweicht. Ein Formstuck (90) ist nach Art eines U ausgebildet und an einem Polkern angeordnet. Auf seiner Ausenseite ist es mit isolierenden Fuhrungsausnehmungen (98) fur die Elemente der zugeordneten Spule versehen. Dieses Formstuck (90) isoliert die U-formigen Elemente der zugeordneten Spule gegen den betreffenden Polkern und halt sie im Abstand voneinander, um Windungsschlusse zu vermeiden.

Arrangement with a ventilator and a pump

Abstract: The invention relates to an arrangement comprising a ventilator (42'), a fluid pump (134), and an electric drive motor (106). The latter comprises a stator (22) with a stator winding (118) which is configured for generation of a rotating field. A permanent magnetic outer rotor (106) is associated with the stator (22) in order to drive the ventilator (42') and a permanent magnetic inner rotor (140) is associated with the stator (22) in order to drive the fluid pump (134). The stator winding (118) thus drives the rotor (106) of the drive motor and the ventilator (42') in addition to the inner rotor (140) and the fluid pump (134). The arrangement is extremely suitable for use in combination with a fluid cooler (90).

Arrangement with a contact element

Abstract: A printed circuit board (20) is provided with at least one strip conductor (22) and a contact element (44). The latter is configured in such a way that it can act as a contactor for an electric conductor (66) to ensure connection to the printed circuit board (20).The printed circuit board (20) is provided with continuous recesses in the region of a predefined strip conductor (22). The contact element (44) has a base part (46) and small legs (34,36,38,40,42) which can be pressed into predefined recesses (24-32) of the printed circuit board (20). The contact element is electrically connected to the predefined strip conductor (22) in the region of the base part (46) thereof by means of a soldered connection (74). The contact element (44) has a contact tongue (54) which is springingly coupled to the base part (46) and which is used to act as a contactor for the electric conductor (66). This ensures secure connection of the electric conductor (66) to the printed circuit board e.g. for connection of a device requiring a large amount of current.

Method of determining the rotational direction of an electronically commutated motor determines the course of the induced voltage by measuring characteristics at at least two positions

Abstract: A method of determining the rotational direction of an electronically commutated motor with a multiphase stator and permanent magnet rotor comprises finding the course of the induced voltage in a momentary current-less phase, or at a transistor, by finding characteristic values at at least two positions and thus finding the direction. Independent claims are also included for the following: (A) a motor for the above method;and (B) a method of sensor-less control of the commutation.

Method for implementing an electric installation

Abstract: The invention relates to a method for implementing an electric installation, in particular a ventilation system. Said electric installation comprises spatially distributed electromechanical functional units (1) which are arranged on specific constructional positions, said functional units being controlled in an individual manner by means of a (network)address (7) which is stored in an electronic form via a signal transfer network from a central control unit (3). Each functional unit (1) is provided with a first optical, electromagnetic and/or mechanical identification code (6) which can be read from the outside and which is clearly allocated to the device-specific internal address (7). Each functional unit also comprises a second optical, electromagnetic and/or mechanical additional code (8) which contains specific information and which can also be read from the outside. Both codes (6, 8) are detected in pairs and electronically stored and are transferred to the control unit (3) for further processing using optical, electromagnetic and/or mechanic reading means.

Radial fan wheel

Abstract: The invention relates to a radial fan wheel (1), in particular for use in gas fans with a steep fan characteristic curve. Said fan wheel is characterised as follows: it comprises a plurality of vanes (2) that are distributed over its circumference; the vanes (2) run, when viewed in the radial direction, from an inner intake region (4) to an outer exit region (6); when viewed in an axial direction, i.e. in the direction of the rotational axis (14), the vanes (2) run between an intake side (16) and an axially opposite hub side (18); on the intake side (16), the vanes (2) are connected along and beyond their radial extension to the exit region (6) to a cover plate (20), which comprises a central inflow opening (22) that opens into the intake region (4); on the hub side (18), the vanes (2) are only connected to a central hub (24) by their radially innerlying end regions; the vanes (2) and the cover plate (20) define an outer fan wheel diameter (D), which is at least ten times as long as an axially measured flow exit width (B) of the vanes (2) in the exit region (6).

Cooling device for an electric or electronic component and method for mounting the same

Abstract: A cooling arrangement for an electrical or electronic component (1), comprises a cooling member (2) which takes up heat from the component to be cooled. The component has a foil, mat, film or band type heat conducting element (3) located in an opening (O) in the cooling member. The opening is a groove with a U or V-shaped cross section.