摘要:
The invention relates to sensorless position determination for magnetic mounting. Magnetic mounting is used to mount an object with the aid of a magnetic field which is generally produced by an electromagnet. The position of the object relative to the bearing is of interest for controlling the bearing. The object position can be determined by estimating the inductance. The inductance is estimated with the aid of a least-squares method, wherein the electrical resistance of the bearing should be taken into account. The resistance is subject to certain variations, for example on account of temperature fluctuations. However, an incorrect resistance value is reflected in the estimated inductance error (I). A method which can be used to adapt the resistance is therefore proposed. The electrical resistance can be estimated by controlling the inductance error ΔL̂ to zero. In this case, the resistance adaption consists of a low-pass filter and an I controller.
摘要:
The invention relates to a wheel drive unit (4), particularly a hub drive unit, for a wheel (2, 3) of an electrically driven vehicle (1), having an electric machine (5) for driving the wheel (2, 3), which machine has a stator and a rotor which is rotatably mounted on the stator and can be connected to the wheel (2, 3) of the vehicle (1), and having an electronic control device (7) for controlling the electric machine (5), wherein the wheel drive unit (4) has a holding brake (8) with an electromechanical actuator, by means of which, when the wheel drive unit (4) is in a holding mode, the rotor of the electric machine (5) is mechanically fixed with respect to the stator.
摘要:
The invention relates to a propeller drive (20') which is, in particular, an aircraft drive and comprises a propeller machine (100) as well as an electric drive (30, 50) that is connected without a converter to said propeller machine (100). The aircraft (10') comprises such a propeller drive (20').
摘要:
The invention relates to a magnetic coupling, comprising a first coupling part, which can be rotated about an axis of rotation, a second coupling part, which can be rotated about the axis of rotation, and at least one coil, which is designed to generate a magnetic field along the axis of rotation through the first and second coupling parts for contactless transmission of a torque between the first and second coupling parts. A magnetic coupling having a magnetic field along the axis of rotation has the advantage that forces that act on the coupling parts in a radial direction can be reduced.
摘要:
The invention intends to provide a simply designed magnetic coupling. For this purpose, the invention relates to a magnetic reluctance coupling for coupling a first shaft (1) to a second shaft (2), having a hollow cylindrical stator (3) which has at least one magnet (10) that is/are distributed around the circumference of the stator. The reluctance coupling also has a first rotor (4), which is supported in such a way that it can rotate within the stator (3), is connected to a first shaft (1) in a rotationally fixed manner, and has a plurality of ferromagnetic first portions distributed around the circumference thereof and spatially separated from one another, as well as a second rotor (5), which is supported in such a way that it can rotate within the first rotor (4), is connected to the second shaft (2) in a rotationally fixed manner, and has a plurality of ferromagnetic second portions distributed around the circumference thereof.