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.

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.

Apparatus for sensing the absolute-value angle of a shaft

Abstract: An apparatus serves to sense the absolute value of the rotational position of a shaft ( 14 ). The apparatus has a first single-turn rotary encoder ( 30 ) that is arranged at one end ( 20 ) of the shaft ( 14 ) and is arranged to sense the latter's rotational position within a single shaft revolution. Also provided are: a multi-turn rotary encoder unit which senses the number of revolutions of the shaft ( 14 ) and which comprises a reduction gear linkage ( 18 ); a rotary element ( 42 ), driven by the output of the linkage, that is oriented as an imaginary continuation of the shaft ( 14 ) and coaxially therewith; and a second single-turn rotary encoder ( 48 ) which is arranged to sense the rotational position of the rotary element ( 42 ) within a single revolution. The reduction gear linkage ( 18 ) surrounds the shaft ( 14 ), and its output element ( 38 ) is connected, via a connecting member ( 40 ), to said rotary element ( 42 ) around the first single-turn rotary encoder ( 30 ). An unusually compact combination motor/encoder unit can thereby be achieved, suitable for installation in small spaces, e.g. a few centimeters wide.

Electronically commutated dc motor comprising a bridge circuit

Abstract: Disclosed is an electronically commutated DC motor comprising a stator which is provided with at least one stator winding (22, 24, 26), a rotor (28) which electromagnetically interacts therewith, a positive and a negative DC line (76, 78) supplying the motor (20) with current, particularly from a battery (77), a full-bridge circuit (74) which controls the current in the at least one stator winding (22, 24, 26) and is provided with a plurality of bridge branches, each of which comprises an upper bridge transistor (66, 80, 86) controlling the current from the positive DC line (76) to a connection (68; 82; 88) that is assigned to said stator winding (22, 24, 26) and a lower bridge transistor (70, 84, 90) controlling the current from the respective connection of the stator winding to the negative DC line (78). The inventive motor also comprises an arrangement generating a plurality of rotor position signals and an arrangement controlling a given bridge transistor by interlinking rotor position signals that are assigned thereto, said rotor position signals being interlinked by a control transistor (60). A first rotor position signal (H1) can be fed to the base of said control transistor (60) while a second rotor position signal (H2) can be fed to the emitter thereof. The collector signal thereof controls the given bridge transistor (66). Also disclosed is a circuit comprising a half-bridge.

Automotive Electrical Actuation Technologies

Abstract: The present paper presents an overview of actual high performance electric drives for automotive applications. The field of applications spans a broad range from active steering, power steering, electromechanical brakes, clutch and shift actuators, suspension, damping and stabilization actuators, heating, ventilation, and air conditioning up to starter-generators and traction, including x-by-wire (e.g. steer-by-wire, brake-by-wire). Most of these applications require high performance motors with a high torque/volume (mass) ratio, low inertia, high dynamics, good field-weakening and high temperature standing capability. In the actual situation on the global automotive market the demands for the electric actuators become more stringent.