A method for controlling a planar drive system includes identifying a preferred stator module direction with a preferred magnetic field or sensor direction, and identifying a preferred mover direction with a respective other of the preferred magnetic field or sensor direction; setting a magnetic orientation field with a magnet device; recording at least a measurement value of the magnetic orientation field with a magnetic field sensor device; determining an alignment of the preferred mover direction relative to the preferred stator module direction based on the measurement value of the component of the magnetic orientation field parallel to the preferred sensor direction; and determining a first orientation of the mover on the stator module, on the basis of the alignment of the preferred mover direction relative to the preferred stator module direction. The application also relates to a planar drive system.

A homopolar multi-core energy conversion device is an apparatus that uses magnetic flux commutation instead of a combination of electrical current commutation and brushes. The apparatus includes a first discontinuous annular stator core, a second discontinuous annular stator core, and a rotor core. The first discontinuous annular stator core is configured to generate a circumferentially-segmented clockwise magnetic flux around the rotor core, while second discontinuous annular stator core is configured to generate a circumferentially-segmented counter-clockwise magnetic flux around the rotor core. The rotor core is configured to radially partition a traversing magnetic flux. The circumferentially-segmented clockwise magnetic flux, the circumferentially-segmented counter-clockwise magnetic flux, and the traversing magnetic flux interact with each other so that the apparatus can function either as a motor or as a generator. The aforementioned components of the apparatus can be configured into different embodiment to achieve the same function.

Stator modules are disclosed. Stator modules may include: a stator body; a working surface supported relative to the stator body; and a plurality of electrical conductors, each electrical conductor of the plurality of electrical conductors extending along a respective portion of the working surface and operable to generate a magnetic field to facilitate moving, relative to the working surface, a magnetized mover in the magnetic field in response to electrical current through the electrical conductor. Robotic systems including such stator modules are also disclosed.

A linear motor system includes: a stator including first to tenth coils; a mover including a permanent magnet; a switcher that switches one or more power supply target coils that serve as power supply targets; and a control device that supplies power to the one or more power supply target coils by using a total mass calculated based on a mass of the permanent magnet. The control device includes: an acquirer that acquires a total number of the one or more power supply target coils; a speed control unit that calculates a post-division total mass by dividing the total mass by the total number of the one or more power supply target coils, and generates a torque instruction by using the post-division total mass; and a current control unit that supplies power to the one or more power supply target coils based on the torque instruction.

The present disclosure provides a brushless direct drive linear servo actuator, comprising: a stator, a mover and a housing, wherein the stator is a pair of armatures arranged in mirror symmetry at both sides of the mover, the housing integrally encapsulates the stator and forms a cavity for the mover at the mover, and the mover has an output end protruding out of the housing and is linearly movable along a direction of the output end. A displacement signal emitter is provided at a side of the mover, and a signal receiver is provided within a cover arranged outside the housing on said side for detecting a displacement signal emitted by the emitter of the mover. The actuator of the present disclosure is characterized by high reliability, high accuracy and low cost.

An electric linear actuator may include a step-shaped reluctance armature. The electric linear actuator may further include a set of stationary excitation coils which are excited by a controller. The controller applies direct current voltage to the stationary excitation coils in an excitation sequence. The excitation sequence may be provided in a linear sequence for translating the armature in a forward linear motion followed by a reverse linear motion. The armature may also be coupled with a piston rod. By the coupling, the piston rod may travel between multiple positions. No rotating ball screw or hydraulic pressure is required to provide multiple position linear displacement. The electric linear actuator may also include a lock solenoid. The lock solenoid may lock the piston rod at each of the positions when no energy is being supplied.

An electric linear actuator may include a step-shaped reluctance armature. The electric linear actuator may further include a set of stationary excitation coils which are excited by a controller. The controller applies direct current voltage to the stationary excitation coils in an excitation sequence. The excitation sequence may be provided in a linear sequence for translating the armature in a forward linear motion followed by a reverse linear motion. The armature may also be coupled with a piston rod. By the coupling, the piston rod may travel between multiple positions. No rotating ball screw or hydraulic pressure is required to provide multiple position linear displacement. The electric linear actuator may also include a lock solenoid. The lock solenoid may lock the piston rod at each of the positions when no energy is being supplied.

The invention relates to an electric motor having at least one magnetic track, which has a plurality of magnet elements connected in a line in a longitudinal direction or in the shape of a ring, in particular in a Halbach array configuration, and having at least one coil assembly, which includes a support that is substantially electrically and magnetically non-conductive with respect to the magnetic track, which is configured such that the coil assembly and the magnetic track are capable of carrying out a guided movement relative to each other, and which includes at least one group of three conductive flat coils. Each of the three flat coils is connected to one phase of a three-phase power supply, and the conductor tracks of the three flat coils of the group or of each group are arranged so as to be nested in each other or overlap with each other on a first and second support conductor plane, which are electrically insulated from each other by an insulating intermediate layer, such that parts of the conductor pattern of each of the three flat coils are designed to be connected one over the other and together in parallel on the first and second conductor plane and two of the three overlapping flat coils in each case have crossover regions in which the conductor tracks of the first flat coil only run on the first support conductor plane and the conductor tracks of the second flat coil only run on the second support conductor plane.

A linear actuator includes a guide rail, a wall portion, a coil, a heat transfer member, a heat radiation member, and a heat insulation member. A mover having a permanent magnet is movable along the guide rail. The wall portion is installed on a pedestal and supports the guide rail. The heat transfer member is coupled to the coil and the heat radiation member is coupled to an end of the heat transfer member. The heat insulation member is installed on the pedestal and coupled to the heat radiation member. The heat transfer member is arranged apart from the wall portion.

In a method for operating an electric machine with at least two coils and a magnetizable, movable core such as an armature or a rotor, a current of a constant average value is applied from a direct current source at the coils in such a way that the device is operated in the magnetic saturation range of the core. More particularly, one linear and one rotational actuator is proposed for such an operating mode.