A battery powered device includes a battery and a motor controller that is coupled to the battery. A motor is operably coupled to the motor controller. The motor controller is configured to detect an amount of available power from the battery and engage the motor based on the amount of available power.

A bipolar transverse flux electric motor that is configured to produce a uniform distribution of alternating magnetic fields through utilization of a specific stator and a first coil and a second coil. The bipolar transverse flux electric motor includes a first coil and a second coil wherein the first coil and second coil are positioned in a side by side configuration and wherein the first coil and second coil are have a current flow in opposing directions. The plurality of stators have a shape that includes upper portion and a lower portion with an internal void. The upper portion is greater in width that the lower portion and the lower portion includes two members configured to create a step form. The step form of the lower portion is configured to facilitate the inverse positioning of the stators so as to provide magnetic fields in opposing directions for adjacent stators.

A dual-drive device for sequential scanning includes a moving part comprising a frame and an optical instrument that is positioned on the frame and is rotatable about a first axis with respect to the frame so as to be slowed down or immobilized in a plurality of successive positions about the first axis, a motor configured to set the moving part in rotation about the first axis in a first direction of rotation at a constant speed, the moving part comprising a first actuator positioned on the frame and configured to actuate the rotation of the optical instrument about the first axis with respect to the frame in the first direction of rotation in order to pass from a first position to a successive position from the plurality of successive positions, and in a second direction of rotation, opposite to the first direction of rotation, in order to slow down or immobilize the optical instrument in the successive position.

The rotary electrical machine having a homopolar structure includes a number Npe of electrical phases. The machine includes a juxtaposition, along the rotational axis of the rotary electrical machine, of at least one pair of armatures having a number of poles Np, placed on both sides of at least one inductive coil wound around the rotational axis, two adjacent armatures being angularly offset by any electrical angle s, preferably between 0 and 180/Npe, and at least one passive inductor of ferromagnetic material, separated from the armatures by an air gap. Either the armatures form the rotor, or the inductor and the other element form the stator.

A stepping motor includes a one-piece stator integrally molded by using a FeNi alloy plate through machining, a rotor accommodating through-hole, and in which a magnetic path is disposed around the rotor accommodating through-hole. A rotor is rotatably arranged inside the rotor accommodating through-hole. A magnetic core is connected to the stator, and a coil is wound on the magnetic core. A Cr-diffusion region having a molten-solidified portion of Cr is diffused in the FeNi alloy stator in a portion of the magnetic path.

An eletromagnetic coil, a mold, and an electromagnetic coil manufacturing method are provided. The eletromagnetic coil includes an annular main body, and an inner peripheral wall of the annular main body comprises multiple claw poles arranged at intervals in a circumferential direction. The electromagnetic coil further includes an encapsulation layer, and the encapsulation layer is capable of encapsulating an upper annular wall, a lower annular wall, and an outer peripheral wall of the annular main body. The encapsulation layer is not disposed between the claw poles, and is formed by injection molding of a resin material. In the electromagnetic coil, the encapsulation layer is not disposed between the claw poles of the inner peripheral wall of the annular main body, such that after moisture having entered the interior of the coil can be discharged therefrom within a short time.

The invention provides an electrically operated valve which can more accurately detect a position of a valve body. An electrically operated valve is provided with a valve shaft, a valve body, a rotor member which is movable together with the valve shaft in a parallel direction to a first direction, a stator member which applies a turning force to the rotor member, a permanent magnet member which turns together with the rotor member, an angle sensor which detects an angle of rotation of the permanent magnet, and a guide member which guides a relative movement of the rotor member or the valve shaft in relation to the permanent magnet member. A distance between the permanent magnet and the angle sensor is fixed when the permanent magnet member turns.

A rotor for a reluctance motor having a laminate stack of layers is disclosed. Each layer has at least one magnetically-conductive rotor lamination, and in each layer a plurality of flux-conducting sections are formed by the at least one rotor lamination, which flux-conducting sections are separated from one another by a nonmagnetic region. The invention addresses the problem of enabling a high torque and a high speed. For this purpose, an insert disk is arranged between at least two of the layers, connected in each case to at least two flux-conducting sections of one of the layers or both of the layers between which said insert disk is arranged and, as a result, connects said flux-conducting sections to one another beyond the nonmagnetic region located there between.

A driving circuit drives a stepping motor in synchronization with an input clock using a 2-phase excitation method. A constant current chopper circuit generates a pulse modulation signal such that the detection value of the coil current approaches a current setting value. A detection window generation circuit generates a detection window. The detection window becomes an open state at a timing at which the coil current I.sub.OUT becomes smaller than a predetermined threshold value. A logic circuit sets a full-bridge circuit to a high-impedance state when the detection window is in the open state and controls the full-bridge circuit according to the pulse modulation signal when the detection window is in the closed state. In the open state of the detection window, a back electromotive force (BEMF) detection circuit detects the BEMF of the coil. A current value setting circuit controls a current setting value based on the BEMF.

A driving circuit drives a stepping motor in synchronization with an input clock using a 2-phase excitation method. A constant current chopper circuit generates a pulse modulation signal such that the detection value of the coil current approaches a current setting value. A detection window generation circuit generates a detection window. The detection window becomes an open state at a timing at which the coil current I.sub.OUT becomes smaller than a predetermined threshold value. A logic circuit sets a full-bridge circuit to a high-impedance state when the detection window is in the open state and controls the full-bridge circuit according to the pulse modulation signal when the detection window is in the closed state. In the open state of the detection window, a back electromotive force (BEMF) detection circuit detects the BEMF of the coil. A current value setting circuit controls a current setting value based on the BEMF.