在一工业卡车，其通过液压泵（33）配有压力介质，其特征在于，所述液压泵（33）由电动泵马达（32）被驱动供电的工作液压系统，电动泵马达（32）（5），其具有电枢的定子绕组 （8），其具有的间距正比于对定子极的数量（6）（5），并且场磁铁装置，用于通过一角度相对于形成在旋转方向下的磁通与电枢的磁场绕组（8）偏离方向上的定子的， 特别是通过在定子（5）具有四个定子磁极（6）和转子（1），具有取向在高磁导率与低磁阻的转子极（4）的软磁性材料的转子极（4）90°。

In an industrial truck with a working hydraulic system which is powered by a hydraulic pump (33) with pressure medium, wherein the hydraulic pump (33) by an electric pump motor (32) is driven, the electric pump motor (32) a stator (5) having an armature winding (8), which has a pitch proportional to the number of pairs of stator poles (6) of the stator (5), and field magnet means for forming a magnetic flux under a in the rotational direction by an angle with respect to a magnetic field of the armature winding (8) deviating direction, in particular by 90 ° in a stator (5) with four stator poles (6),
and a rotor (1) of soft magnetic material of high permeability with rotor poles (4) to lower, with the orientation of the rotor poles (4) magnetic reluctance.