ebm-papst

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.

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.

Method for limiting the current in an electric motor, and a motor for carrying out one such method

Abstract: The invention relates to a method for limiting the current in a direct current motor, acting on a full bridge circuit (137) by which means the stator winding configuration (102) of said motor is supplied with a current. When the current limitation responds, the energy supply from the direct current network to the stator winding configuration (102) is interrupted. The stator winding configuration is then operated essentially in short circuit by means of static switches of the full bridge circuit, and the flowing, decaying current is essentially used to continue to drive the motor. When said current reaches a lower value, the energy supply from the direct current network to the motor is reactivated. Preferably, the effective value of the current flowing to the motor is thus reduced when the current limitation responds. The length of time during which said current flows in the form of blocks of current is then increased in a compensatory manner.

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.

Procedures and Control System to Control a Brushless Electric Motor

Abstract: The present invention relates to a method and a control system for driving a three-strand brushless, electronically commutated electric motor (2), wherein a line AC voltage (UN) is rectified and fed via a slim DC link (8) with minimum DC link reactance as a DC link voltage (UZ) to an inverter (10) that can be driven to supply and commutate the electric motor (2). A pulsating DC voltage (UG) initially generated by rectifying the line AC voltage (UN) is dynamically increased with respect to its instantaneous values by a step-up chopper (18) in such a manner that the resulting DC link voltage (UZ) with a reduced ripple always lies above a defined limit voltage (U18/U1) over time. The control system consists of a network rectifier (6), a downstream slim DC link (8) with minimum DC link reactance and a controllable inverter (10) that can be supplied via the DC link and driven to commutate the electric motor (2). A step-up chopper (18) is integrated therein with a controller (20) designed in such a manner that, the pulsating DC voltage (UG) rectified by the network rectifier (6) is dynamically increased with respect to its instantaneous values in such a manner that the resulting DC link voltage (UZ) with a reduced ripple always lies above a defined limit voltage (U20/U1) over time. Stray inductances (Ls1-Ls3) of the motor winding heads present in the electric motor (2) are used as inductor (L) for the step-up chopper (18).