摘要:
The invention relates to a method for controlling a reluctance motor comprising a rotor (1) and a stator (10) which is provided with individual stator coils (22). A predefined current flows in the coils (22) according to the load of the motor. The invention also relates to a reluctance motor. The aim of the invention is to advantageously improve a method or a reluctance motor, especially with respect to control. Different control methods are applied according to the number of revolutions of the rotor (1). A fixed rotary field is provided when the number of revolutions is small. The gaps (4) between the wing-like rotor segments (3) are filled for producing a cylinder body.
摘要:
Es wird eine Schaltungsanordnung zum Betreiben eines elektromagnetischen Stellglieds, insbesondere eines als geschalteten Reluktanzmotor ausgebildeten Elektromotors, angegeben, bei der der Elektromotor auch bei Störungen oder Ausfall eines Teils der Energieversorgungslage zumindest in einer Art Notbetrieb weiter betrieben werden kann. Die Schaltungsanordnung weist vorzugsweise neben einer Hauptbatterie eine als Redundanz dienende Zusatzbatterie auf, die kleiner ist und eine geringere Nennspannung hat als die Hauptbatterie. Um bei Ausfall der Hauptbatterie den hinsichtlich seiner Nennspannung an die Nennspannung der Hauptbatterie angepaßten Elektromotor betätigen zu können, ist parallel zu den Batterien ein ein- und ausschaltbarer Kondensator vorgesehen, in den durch Ein- und Ausschalten des Stroms durch eine Erregerwicklung des Elektromotors nach Art eines Schaltreglers eine Energiemenge angesammelt werden kann, wobei die Spannung in dem Kondensator die Nennspannung der Zusatzbatterie dann übersteigt. Nach Ansammeln einer ausreichenden Energiemenge kann dann der Elektromotor kurzzeitig mittels der in dem Kondensator gespeicherten Energie betätigt werden. Bevorzugtes Anwendungsgebiet der Erfindung sind elektrisch betätigbare Bremsanlagen in Nutzfahrzeugen.
摘要:
The invention relates to a reluctance motor (1) having a rotor (3) and a stator (2). The stator (2) has individual stator coils (6), and a predefined current (I) flows in one of the coils (6), in accordance with the engine (1) load. The invention aims to achieve adequate precision in determining the rotor position with simple and inexpensive measuring methods. To this end, the predefined current (I) is obtained by applying a constant voltage (U), and the time (t1, t2) necessary to reach the maximum current value (I Max) when applying this constant voltage (U) is measured, giving the value of the engine (1) load.
摘要:
The invention relates to a reluctance motor (1) having a rotor (3) and a stator (2). The stator (2) has individual stator coils (6), and a predefined current (I) flows in one of the coils (6), in accordance with the engine (1) load. The invention aims to achieve adequate precision in determining the rotor position with simple and inexpensive measuring methods. To this end, the predefined current (I) is obtained by applying a constant voltage (U), and the time (t1, t2) necessary to reach the maximum current value (I Max) when applying this constant voltage (U) is measured, giving the value of the engine (1) load.
摘要:
An electrical machine comprises a rotor without windings, a stator having an armature winding (24, 25) and a field winding (10) for generating a magnetomotive force in a direction extending transversely of the magnetomotive force generated by the armature winding. An electronic circuit (40) is provided for controlling the current in the armature winding (24, 25) such that periods in which a magnetomotive force in one direction is associated with a first current pulse alternate with periods in which a magnetomotive force in the opposite direction is associated with a second current pulse. A position sensor is provided for monitoring the rotational position of the rotor and for supplying output signals dependent on the speed of rotation of the rotor. Furthermore a control system (32) supplies control signals to the circuit (40) to control the current in the armature winding (24, 25). In order to enhance the performance at high speed, the control signals are produced in response to sensor output signals which provide an advanced indication of the rotational position of the rotor. Furthermore, in order to prevent oscillation of the rotor on start-up, the control signals supplied to the circuit (40) during an initial start-up period are each produced after a time delay as compared with the production of the control signals over subsequent cycles of rotation during acceleration of the rotor. This can be achieved with simple on/off control of armature and field switching devices, so that the control circuitry can be produced at relatively low cost.