Solenoid

About: Solenoid is a research topic. Over the lifetime, 19278 publications have been published within this topic receiving 114721 citations.

Low-Temperature Operation of a Bulk HTSC Staggered Array Undulator

Abstract: A use of bulk high-temperature superconductors (HTSs) for an undulator is attractive since a high magnetic field can be generated at low-temperatures. While potential for generation of the high magnetic field is high, in-situ magnetization of the bulk HTSs for periodic field generation is challenging issue. Recently, we proposed a new type of undulator using bulk high-Tc superconductors (HTS) and a solenoid magnet. The undulator, named Bulk HTSC staggered array undulator (Bulk HTSC SAU), consists of a stacked array of bulk HTSs and copper insulators and a solenoid magnet. A proof of principle experiment at 77 K using liquid nitrogen has been carried out. The estimated performance at about 30 K was estimated using results of property measurements for the HTS used for the Bulk HTSC SAU. The expected undulator peak field reaches to 1.08 T for undulator period length of 9.9 mm for the undulator gap of 4.0 mm. This performance is about 2 times higher than that of existing technologies.

Starter with compact structure

Abstract: An electromagnetic switch is disclosed as having an electromagnetic switch, operative to open or close a main contact of a motor circuit, and a solenoid having a function to push a pinion gear to a position away from a motor. The electromagnetic switch and the solenoid are placed in series in a unitary structure such that the electromagnetic switch and the solenoid have a switch case and a solenoid case both of which are integrally formed with each other to be contiguous in an axial direction. Further, a stationary core for the electromagnet and a stationary core for the solenoid are integrally formed and an operational direction of a plunger for the electromagnet and an operational direction of a plunger for the solenoid are set to be opposite in direction.

EM Drive Thruster by Anti Maxwell Dual Monopole Tubular Interference Field Reduction Around a Conductor.

Abstract: A so called Em Drive ( Electro Magentic Drive) defy classical physics expectations because it shows repellent less or reaction less thruster qualities. According to Quantum FFF Theory (Function Follows Form at the quantum level) however, the magnetic field is build on two monopole rigid string particles which can be represented as curved lines of radiation trajectories, for a stable magnetic field more or less cooperating by opposing each other. Thus, the magnetic quantum field has always TWO different shaped curved monopole vector components: a North- and a South vector field component. This is comparable with the electric Quantum field, equipped with Plus and Minus vector components but it is in contrast with all other quantum fields like the neutrino- gravity-or x-gamma ray field. However, based on observation of iron filing-powder patterns, close to direct currents in a wire, it is postulated, that these monopole ( N+S) particle/ wave dualities travel locally parallel to each other inside the vacuum Axion/Higgs field, with a strong field reduction result also called a magnetic B-flied effect. A so called B field is well known to be present around a long solenoid. Inside the spiral solenoid, there is the strongest magnetic field present, however outside the solenoid the magnetic field is reduced down to zero, also originated by the anti Maxwell dipping field effect . This Anti Maxwell dipping phenomenon is originated by the interference of both ( N+S) monopole fields of parallel propagating magnetic monopole radiation trajectories, according to my monopole magnetic Quantum FFF model. These B field reductions (or dipping) are also observed to be concentrated in a tubular form around the current in a conductor..

Fail-safe means for solenoid actuated devices

Abstract: Fail-safe means for solenoid actuated devices, such as door locks, valves and the like, wherein the actuated element is operable to an active position upon energization of the solenoid, and upon deenergization of the solenoid is activated by a compression spring to an inactive position. A pair of permanent magnets provide the fail-safe feature, whereby the actuated element will be moved to its inactive position, in the event of spring failure. One of these magnets is fixedly mounted, and the other is carried by the actuated element, the magnets being so oriented as to present closely confronting like magnetic poles in a repulsion mode when the actuated element is in its active position.

Helenoid actuators--a new concept in extremely fast acting solenoids

Abstract: Limitations of conventional solenoids and the relation between solenoid power and operational speed are examined. The action of Helenoid actuators in overcoming problems inherent in conventional solenoids is described. These actuators are capable of armature travel times in less than one millisecond, irrespective of preloads or masses, even with the larger size and power required as duty increases. The Helenoid armature can be designed with higher accelerations for smaller armature movements. For maximum acceleration, the relation among pitch, wall thickness, and thread form must be optimized for a given stroke. A computer program has been developed to calculate armature acceleration using small (under one microsecond), reiterative time steps. Factors affecting armature acceleration and features of Helenoid actuators are noted. Relationships between eddy currents and flux penetration, materials and flux leakage, and inductance and power supply are illustrated. A method for determining preliminary estimates of actuator size is appended.