Patents by Inventor Arno Karwath
Arno Karwath has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11359640Abstract: A set of parts for a radial fan has a fan wheel (2), a main housing part (1), and a complementary housing part (3). They can be assembled to form a first housing that encloses the fan wheel (2). The housing has an inlet opening (27) and an outlet (23). At least one second complementary fan wheels (2?, 2?) (3?, 3?), the shape of which differs from the first fan wheel part (2), can be connected to the motor instead of the fan wheel (2).Type: GrantFiled: February 19, 2020Date of Patent: June 14, 2022Assignee: ebm-papst St. Georgen GmbH & Co. KGInventors: Wolfgang Laufer, Peter Ragg, Arno Karwath, Francisco Rojo, Raul Rosas
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Publication number: 20200182255Abstract: A set of parts for a radial fan has a fan wheel (2), a main housing part (1), and a complementary housing part (3). They can be assembled to form a first housing that encloses the fan wheel (2). The housing has an inlet opening (27) and an outlet (23). At least one second complementary fan wheels (2?, 2?) (3?, 3?), the shape of which differs from the first fan wheel part (2), can be connected to the motor instead of the fan wheel (2).Type: ApplicationFiled: February 19, 2020Publication date: June 11, 2020Inventors: Wolfgang LAUFER, Peter RAGG, Arno KARWATH, Francisco ROJO, Raul ROSAS
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Patent number: 9768649Abstract: An electric motor (10) has a stator (20) having a number S of stator poles (21, 22, 23, 24, 25, 26); a rotor (40) having a rotor magnet (40?), which rotor magnet (40?) has a number R of rotor poles (41, 42, 43, 44, 45, 46), R being equal to S, and the rotor (40) or the stator (20), or both, exhibiting a magnetic asymmetry. The asymmetry facilitates startup. The electric motor has a single-phase winding arrangement (30) with first (11), second (12) and third (13) terminals. Current can be made to flow, selectively, from either the first or the second terminal, through certain coils, to the third terminal (13). There is an output stage (50), preferably an H-bridge. The W total coils comprise a plurality of subgroups (TG1, TG2) of coils. A method for current flow through an electric motor utilizes these sub-groups (TG1, TG2) for current flow.Type: GrantFiled: February 27, 2014Date of Patent: September 19, 2017Assignee: EBM-PAPST ST. GEORGEN GmBH & Co. KGInventors: Arno Karwath, Bjoern Winter
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Patent number: 9450533Abstract: An electric fan has a drive motor having a fan rotor, an apparatus for generating a rotation speed signal (n_i), an apparatus for generating a power level signal (P_i) that represents power consumed; a first regulator (n_RGL) for regulating the rotation speed signal (n_i) to a predefined target value (n_s); a second regulator (P_RGL) for regulating the power level signal (P_i) to a predefined power level signal target value (P_s) that corresponds to a predefined minimum consumed power level (P_min), where the first regulator (n_RGL) and the second regulator (P_RGL) apply at least one control output signal (SW) to the drive motor and interact in such a way that, during operation, the at least one control value (SW) in a first state is determined by the first regulator (n_RGL), and in a second state is determined by the second regulator (n_RGL).Type: GrantFiled: August 4, 2012Date of Patent: September 20, 2016Assignee: EBM-PAPST ST. GEORGEN GmbH & Co. KGInventors: Arno Karwath, Tobias Maier, Harald Schmid, Richard Kienzler, Stefan Schneider, Frank Heller, Martin Mueller, Gerald Hogg
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Publication number: 20160013686Abstract: An electric motor (10) has a stator (20) having a number S of stator poles (21, 22, 23, 24, 25, 26); a rotor (40) having a rotor magnet (40?), which rotor magnet (40?) has a number R of rotor poles (41, 42, 43, 44, 45, 46), R being equal to S, and the rotor (40) or the stator (20), or both, exhibiting a magnetic asymmetry. The asymmetry facilitates startup. The electric motor has a single-phase winding arrangement (30) with first (11), second (12) and third (13) terminals. Current can be made to flow, selectively, from either the first or the second terminal, through certain coils, to the third terminal (13). There is an output stage (50), preferably an H-bridge. The W total coils comprise a plurality of subgroups (TG1, TG2) of coils. A method for current flow through an electric motor utilizes these sub-groups (TG1, TG2) for current flow.Type: ApplicationFiled: February 27, 2014Publication date: January 14, 2016Applicant: EBM-PAPST ST. GEORGEN GMBH & CO. KGInventors: Arno KARWATH, Bjoern WINTER
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Patent number: 8772993Abstract: An electric motor (20) has a stator (30) and a rotor (26). The latter is equipped with a cup-like rotor part (56) and with a ring magnet (60) adhesively bonded therein, which magnet has an outer circumference (61) on which are provided elevations (84) and depressions (86) that extend at least partly in the longitudinal direction of the ring magnet (60). The outer circumference (61) of the ring magnet (60), that faces toward the cup-like rotor part (56) after assembly, is formed with at least one opening or channel (68; 69, 88), extending in a circumferential direction, that is connected to at least a plurality of the flat depressions (86). Positive mechanical engagement between adhesive and ring magnet enhances durability, and discourages any tendency toward relative rotation between the magnet (60) and the cup-like rotor part (56).Type: GrantFiled: July 21, 2008Date of Patent: July 8, 2014Assignee: EBM-Papst St. Georgen GmbH & Co. KGInventors: Rainer Strohm, Tobias Maier, Volker Hildebrand, Juergen Pfaff, Arno Karwath
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Publication number: 20140042949Abstract: An electric fan has a drive motor having a fan rotor, an apparatus for generating a rotation speed signal (n_i), an apparatus for generating a power level signal (P_i) that represents power consumed; a first regulator (n_RGL) for regulating the rotation speed signal (n_i) to a predefined target value (n_s); a second regulator (P_RGL) for regulating the power level signal (P_i) to a predefined power level signal target value (P_s) that corresponds to a predefined minimum consumed power level (P_min), where the first regulator (n_RGL) and the second regulator (P_RGL) apply at least one control output signal (SW) to the drive motor and interact in such a way that, during operation, the at least one control value (SW) in a first state is determined by the first regulator (n_RGL), and in a second state is determined by the second regulator (n_RGL).Type: ApplicationFiled: August 4, 2012Publication date: February 13, 2014Inventors: Arno Karwath, Tobias Maier, Harald Schmid, Richard Kienzler, Stefan Schneider, Frank Heller, Martin Müller, Gerald Hogg
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Patent number: 8604726Abstract: The invention relates to a method for operating an electronically commutated motor (10) that comprises a rotor (12), a stator (14) having a multi-strand winding arrangement (16) for whose energization a power stage (18) is provided, a first lead (30) and a second lead (32) for connecting the power stage (18) to a voltage source (24), and a first controller. A first signal (U—34; U—38) is sensed, which signal characterizes a current (I_IN; I_IN?; I_M; I_M?) flowing through at least one of the leads (30; 32); the first controller generates at least one clocked signal (PWM) and outputs it to the power stage (18) in order to influence the first value, permitted current. The invention also relates to a corresponding motor (10).Type: GrantFiled: November 20, 2008Date of Patent: December 10, 2013Assignee: EBM—Papst St. Georgen GmbH & Co. KGInventors: Gerald Hogg, Arno Karwath
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Publication number: 20130323096Abstract: A diagonal ventilating fan (30) has a fan housing (36) and a fan wheel (80), rotatable around a rotation axis, that has associated with it an electric motor (73) to drive it, the fan wheel (80) extending in the direction of the rotation axis between an air inlet side and an air outlet side of the diagonal ventilating fan (30) and serving, as it rotates, to convey air in a main delivery direction from the air inlet side to the air outlet side. The fan wheel (80) has a preferred rotation direction so that, during operation, its blades (82) each have a front side and a back side, and a negative-pressure zone (110) occurs, during operation, adjacent each respective back side of a blade (82). An auxiliary cooling air blower (76) connects to the respective zones (110) to provide an improved flow of cooling air for the electric motor (73).Type: ApplicationFiled: March 20, 2012Publication date: December 5, 2013Inventors: Martin Mueller, Arno Karwath, Harald Schmid, Tobias Maier, Gerald Hogg, Michael Schmitz, Bjorn Winter
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Patent number: 8482235Abstract: A fan arrangement (20) has a fan (24) driven by an electric motor (22). It further has an apparatus for continuously detecting an actual electrical value associated with the electric motor (22) during operation, an input apparatus for inputting a desired electrical value for the operation of said electric motor, a comparison apparatus (26) for comparing said electrical value with the actual electrical value, and a controller which regulates said electrical value by pulse width modulation (36).Type: GrantFiled: November 17, 2008Date of Patent: July 9, 2013Assignee: EBM-Papst St. Georgen GmbH & Co. KGInventors: Markus Gutmann, Arno Karwath, Thomas Dufner
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Patent number: 8264176Abstract: A fan arrangement (20) has a fan (24) driven by an electric motor (22), also an apparatus for detecting the electrical power (PIST) consumed by the electric motor (22) during operation; an input apparatus (28) for inputting a desired rotation speed (nSOLL) of said electric motor (22); a converter (26) for converting said desired rotation speed (nSOLL) into a desired electrical power (PSOLL); and a controller (44), which regulates the control input controlling the electric motor (22) in such a way that the difference between the electrical power (PIST) consumed in operation and the desired electrical power (PSOLL) is reduced, in order thereby to improve the air output characteristic curve (49, 58) of the fan arrangement (20) at least in a portion of the overall operating range.Type: GrantFiled: November 17, 2008Date of Patent: September 11, 2012Assignee: EBM-Papst St. Georgen GmbH & Co. KG.Inventors: Markus Gutmann, Arno Karwath, Thomas Dufner
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Patent number: 8054020Abstract: An electric motor has a DC link circuit (30, 32), a permanent-magnet rotor (104), and a control circuit having a full bridge (114). A program-controlled calculation arrangement (80) is configured to supply the semiconductor switches of a first bridge half with a PWM signal (136, 136?) and to supply the semiconductor switches (118, 122) of the second bridge half with a commutation signal (O1, O2; 150, 150?). An energy storage device (170) is provided which, during normal operation of the motor (102), is chargeable from the DC link circuit (30, 32) and serves, upon cessation of the signals from the calculation arrangement (80), to make the semiconductor switches (118, 122) of the other bridge half conductive, and thereby to short-circuit the stator winding arrangement (106) through those semiconductor switches (118, 122) in order to decelerate the permanent-magnet rotor (104) and to thereby minimize risk of human injury.Type: GrantFiled: June 15, 2009Date of Patent: November 8, 2011Assignee: EBM-Papst St. Georgen GmbH & Co. KGInventors: Arno Karwath, Elvis Nocita
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Patent number: 7902776Abstract: An improved electric motor has a rotor (124), a stator (125) having at least one phase winding strand (126), an output stage (122) for influencing the current flow in said phase winding strand, a DC link circuit (170) for supplying the output stage (122) with current, including a link circuit capacitor (178), and a control unit (132) having an arrangement (152) for sensing a value characterizing the current recharge into the link circuit capacitor (178), which control unit (132) is configured to specify commutation instants as a function of the sensed value, and to perform commutation operations in the power stage (122) at the commutation instants thus specified. Avoiding a need for prolonged “currentless intervals” permits achieving higher efficiency and power output, particularly in a motor having less than three winding phases.Type: GrantFiled: March 26, 2007Date of Patent: March 8, 2011Assignee: EBM-PAPST St. Beorgen GmbH and Co. KGInventor: Arno Karwath
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Patent number: 7880421Abstract: An electrically driven fan arrangement, suitable for energy-conserving installations, includes a fan, an electric motor (110) serving to drive the fan, and associated control apparatus, namely: a sensing apparatus (140) for sensing a volumetric air flow rate (125) generated by the fan (120) and for generating a measured volumetric air flow value (Vmess), and a volumetric flow rate control arrangement (160) for automatically controlling the volumetric air flow rate (125) generated by the fan (120) to a predetermined target volumetric air flow value (V_s). The volumetric flow rate control arrangement (160) is configured to generate a target rotation speed value (N_s) for the electric motor (110). A rotation speed controller (170), which automatically controls the rotation speed of the electric motor (110) to the target rotation speed rate (N_s) generated by the volumetric flow rate control arrangement (160), is also provided.Type: GrantFiled: April 18, 2007Date of Patent: February 1, 2011Assignee: EBM-Papst St. Georgen GmbH & Co. KGInventor: Arno Karwath
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Publication number: 20100283420Abstract: A fan arrangement (20) has a fan (24) driven by an electric motor (22). It further has an apparatus for continuously detecting an actual electrical value associated with the electric motor (22) during operation, an input apparatus for inputting a desired electrical value for the operation of said electric motor, a comparison apparatus (26) for comparing said electrical value with the actual electrical value, and a controller which regulates said electrical value by pulse width modulation (36).Type: ApplicationFiled: November 17, 2008Publication date: November 11, 2010Inventors: Markus Gutmann, Arno Karwath, Thomas Dufner
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Publication number: 20100264758Abstract: An electric motor (20) has a stator (30) and a rotor (26). The latter is equipped with a cup-like rotor part (56) and with a ring magnet (60) adhesively bonded therein, which magnet has an outer circumference (61) on which are provided elevations (84) and depressions (86) that extend at least partly in the longitudinal direction of the ring magnet (60). The outer circumference (61) of the ring magnet (60), that faces toward the cup-like rotor part (56) after assembly, is formed with at least one opening or channel (68; 69, 88), extending in a circumferential direction, that is connected to at least a plurality of the flat depressions (86). Positive mechanical engagement between adhesive and ring magnet enhances durability, and discourages any tendency toward relative rotation between the magnet (60) and the cup-like rotor part (56).Type: ApplicationFiled: July 21, 2008Publication date: October 21, 2010Inventors: Rainer Strohm, Tobias Maier, Volker Hildebrand, Juergen Pfaff, Arno Karwath
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Publication number: 20100259203Abstract: The invention relates to a method for operating an electronically commutated motor (10) that comprises a rotor (12), a stator (14) having a multi-strand winding arrangement (16) for whose energization a power stage (18) is provided, a first lead (30) and a second lead (32) for connecting the power stage (18) to a voltage source (24), and a first controller. A first signal (U_34; U_38) is sensed, which signal characterizes a current (I_IN; I_IN?; I_M; I_M?) flowing through at least one of the leads (30; 32); the first controller generates at least one clocked signal (PWM) and outputs it to the power stage (18) in order to influence the first value, permitted current. The invention also relates to a corresponding motor (10).Type: ApplicationFiled: November 20, 2008Publication date: October 14, 2010Inventors: Gerald Hogg, Arno Karwath
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Publication number: 20100253249Abstract: A fan arrangement (20) has a fan (24) driven by an electric motor (22), also an apparatus for detecting the electrical power (PIST) consumed by the electric motor (22) during operation; an input apparatus (28) for inputting a desired rotation speed (nSOLL) of said electric motor (22); a converter (26) for converting said desired rotation speed (nSOLL) into a desired electrical power (PSOLL); and a controller (44), which regulates the control input controlling the electric motor (22) in such a way that the difference between the electrical power (PIST) consumed in operation and the desired electrical power (PSOLL) is reduced, in order thereby to improve the air output characteristic curve (49, 58) of the fan arrangement (20) at least in a portion of the overall operating range.Type: ApplicationFiled: November 17, 2008Publication date: October 7, 2010Inventors: Markus Gutmann, Arno Karwath, Thomas Dufner
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Patent number: 7759884Abstract: An electronically commutated motor has a permanent-magnet rotor (124) having: at least two rotor poles (183, 186, 188, 189); at least one phase (126); a power stage (122); and a rotor position sensor (140). Associated therewith is a control circuit implemented to carry out the following steps in order to even out the motor current (320): A) after a change of the rotor position signal (182), referred to as a first pole change, a first value (I_MEAS(HCnt?1)) of the current through the at least one phase (126) is ascertained; B) after a predetermined time span (T_Default+T_Offset(HCnt?1)), a new commutation is carried out; C) after a change of the rotor position signal (182), referred to as a second pole change, a second value for the motor current (I_MEAS(HCnt)) is ascertained; D) as a function of the difference between the first value (I_MEAS(HCnt?1)) and second value (I_MEAS(HCnt)), the value for the predetermined time span is modified.Type: GrantFiled: November 13, 2006Date of Patent: July 20, 2010Assignee: EBM-Papst St. Georgen GmbH & Co. KGInventors: Thomas Dufner, Frank Heller, Arno Karwath
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Publication number: 20090315491Abstract: An electric motor has a DC link circuit (30, 32), a permanent-magnet rotor (104), and a control circuit having a full bridge (114). A program-controlled calculation arrangement (80) is configured to supply the semiconductor switches of a first bridge half with a PWM signal (136, 136?) and to supply the semiconductor switches (118, 122) of the second bridge half with a commutation signal (O1, O2; 150, 150?). An energy storage device (170) is provided which, during normal operation of the motor (102), is chargeable from the DC link circuit (30, 32) and serves, upon cessation of the signals from the calculation arrangement (80), to make the semiconductor switches (118, 122) of the other bridge half conductive, and thereby to short-circuit the stator winding arrangement (106) through those semiconductor switches (118, 122) in order to decelerate the permanent-magnet rotor (104) and to thereby minimize risk of human injury.Type: ApplicationFiled: June 15, 2009Publication date: December 24, 2009Inventors: Arno Karwath, Elvis Nocita