Electric drive

H - Electricity – 02 – P

Patent

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Details

H02P 29/02 (2006.01) H02P 1/18 (2006.01) H02P 7/298 (2006.01)

Patent

CA 2682980

Electric drive having at least one electric motor (31) to which an electrical motor current (30) is or can be fed by means of a power converter (26), a current regulator (22) by means of which the motor current (30) is or can be regulated as a function of a desired- value signal for current (24, I_soll) by action taken on the power converter (26), and a desired-value emitter for current (20) which is coupled to the current regulator (22) and by means of which a reference signal (23, I_f) is or can be generated for the current regulator (22), wherein the desired-value emitter for current (20) is coupled to the current regulator (22) via an intervening additional circuit (21) by means of which the reference signal (23, I_f) or a signal corresponding to the reference signal is or can be fed to the current regulator (22) as the desired-value signal for current (24, I_soll) in a first mode, and a pulsed signal (I_puls) is or can be generated and is or can be fed to the current regulator (22) as the desired-value signal for current (24, I_soll) in a second mode.

La présente invention concerne un entraînement électrique comprenant au moins un moteur électrique (31) qui est alimenté ou peut être alimenté en courant de moteur électrique (30) au moyen d'un convertisseur de courant (26), un régulateur de courant (22) qui permet de réguler le courant de moteur (30) en fonction d'un signal de valeur de consigne de courant (24, I_soll), par action sur le convertisseur de courant (26), ainsi qu'un transmetteur de valeur de consigne (20) qui est connecté au régulateur de courant (22) et qui permet de produire un signal de référence (23, I_f) pour le régulateur de courant (22). Le transmetteur de valeur de consigne (20) est connecté au régulateur de courant (22), et un circuit supplémentaire (21) est intercalé entre eux. Dans un premier mode de fonctionnement, ce circuit supplémentaire permet de transmettre au régulateur de courant (22) le signal de référence (23, I_f) ou un signal correspondant au signal de référence, en tant que signal de valeur de consigne de courant (24, I_soll), et, dans un second mode de fonctionnement, un signal pulsé (I_puls) est produit, puis est transmis au régulateur de courant (22) en tant que signal de valeur de consigne de courant (24, I_soll).

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