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Institution

ebm-papst

CompanyMulfingen, Germany
About: ebm-papst is a company organization based out in Mulfingen, Germany. It is known for research contribution in the topics: Rotor (electric) & Stator. The organization has 572 authors who have published 736 publications receiving 3763 citations.


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Patent
19 Oct 2005
TL;DR: In this paper, an improved fan arrangement features a radial or diagonal fan 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 motor.
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.

42 citations

Patent
Ralph Wystup1, Helmut Lipp1
12 Jul 2010
TL;DR: In this paper, the driving method involves converting the pulsating direct current (DC) voltage using the step-up chopper (18) into the DC link voltage, which is added up via the free-wheeling diode (D) and DC link capacitor downstream of the inductor.
Abstract: The driving method involves converting the pulsating direct current (DC) voltage using the step-up chopper (18) into the DC link voltage. The pulsating DC voltage is applied at a pulse duty ratio regulated on the basis of the respective instantaneous DC link voltage to an inductor (L). The DC link voltage is added up via the free-wheeling diode (D) and DC link capacitor downstream of the inductor. The stray inductances of the motor winding heads present in the motor (2) are used as the inductor for the step-up chopper. An independent claim is included for a control system.

40 citations

Patent
02 Jul 2004
TL;DR: In this article, a fan arrangement comprises a fan (10) having a fan housing (30 ) within which is arranged a blower wheel (18) which, in operation, moves air from an intake side of the fan to a delivery side.
Abstract: A fan arrangement comprises a fan ( 10 ) having a fan housing ( 30 ) within which is arranged a blower wheel ( 18 ) which, in operation, moves air from an intake side of the fan ( 10 ) to a delivery side. Arranged radially outside the fan housing ( 30 ) is a surrounding mounting frame ( 34 ) that serves to support the fan housing ( 30 ). A membrane ( 32 ), made of an elastic material, elastically connects the fan housing ( 30 ) and mounting frame ( 34 ) to one another and is formed with through holes or apertures ( 33 ) that, in the event of a closure of the output or delivery side of the fan arrangement ( 40 ), enable a return flow, from the delivery side to the intake side of the fan arrangement ( 40 ), of air moved by the blower wheel ( 18 ).

34 citations

Patent
02 Aug 2001
TL;DR: In this article, an electronically commutated direct current machine, consisting of a rotor and a stator, has been presented, which can be supplied with power from a direct current source (73, 74) by a full bridge circuit (78).
Abstract: An electronically commutated direct current machine, comprising a rotor and a stator, has a stator winding arrangement which can be supplied with power from a direct current source (73, 74) by a full bridge circuit (78). A commutation arrangement (49, 50, 52, 54) for commutating the semiconductor switches (1) (80 to 85) is provided and is configured for switching on one of the semiconductor switches in dependence on at least the position of the rotor (110) at a first bridge branch, respectively and for alternately switching on and off a semiconductor switch that is allocated to the switched on semiconductor switch of the first bridge branch, at a second bridge branch, controlled by a clocking signal (PWM2). The invention also provides an arrangement that is configured for generating a reference clocking signal (PWM1), which controls the duty ratio for the alternate switching on and off of the semiconductor switch that is allocated to the first bridge branch by its intensity. A current limiting arrangement (131, 161) which can be controlled by a current desired value signal (PWM I+; PWM I-) is also provided. When a current defined by the current desired value signal is reached in the direct current machine, said arrangement modifies the reference clocking signal in such a way that the current in the direct current machine is not greater than a limit current that is set by the current desired value signal.

34 citations

Patent
Jens Löffler1, Arnold Kuner1
01 Jun 2007
TL;DR: In this paper, an electronically commutated motor has connections for connection to a DC source and a third controllable semiconductor switch (60) controls the power supply from the DC source (63) to the motor (20).
Abstract: An electronically commutated motor (20) has connections (56, 62) for connection to a DC source (63). It has a permanent-magnet rotor (22), as well as a first and a second series circuit (40, 50) in each of which, respectively, a stator winding section is connected in series with a first and a second controllable semiconductor switch, with the two series circuits being connected in parallel to form a parallel circuit (52). In a supply line to this parallel circuit (52), a third controllable semiconductor switch (60) controls the power supply from the DC source (63) to the motor (20). A control apparatus is designed to carry out the following steps during operation: influenced by the rotation position of the rotor (22), the capability to supply power from the DC source (63) to one winding section is activated during a potential current-flow phase and the capability to supply power to the other winding section is deactivated, alternately, during this potential current-flow phase. In this case, the potential current-flow phase to the one winding section is in each case separated in time by a commutation process from that of the other winding section. The third controllable semiconductor switch (60) is switched off at a switching time (Figure 4: t64) in order to initiate a commutation process, during a potential current-flow phase. The first or second semiconductor switch (34, 44) which is switched on at the switching time (t64) is kept switched on so that, during operation, a circulating current (i31; i31') flows in the parallel circuit (50) during operation after the third semiconductor switch (60) has been switched off and produces a driving torque in the motor, with this circulating current being monitored. When this circulating current reaches a predetermined low absolute value, the first and/or second semiconductor switch that is switched on at that instant is switched off. Depending on the rotation position of the rotor (22), the potential current-flow phase in the one winding section is deactivated, and that in the other winding section is activated, as part of the commutation process, and the third semiconductor switch is switched on again.

32 citations


Authors

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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20219
202054
201937
201843
201725
201638