Patent application number | Description | Published |
20080246424 | Brushless motor - The brushless motor has a first and second drive member. The first drive member is equipped with M phase coil groups each having N electromagnetic coils where M is an integer of 1 or greater and N is an integer of 1 or greater. The second drive member has a plurality of permanent magnets, and is able to move relative to the first drive member. The first drive member has 2 (M×N) magnetic body cores. Each phase electromagnetic coil is coiled on a periodically selected magnetic body core at a ratio of 1 to 2M from among the arrangement of 2 (M×N) magnetic body cores. | 10-09-2008 |
20090033166 | BRUSHLESS MOTOR - The brushless motor includes a stator having a electromagnetic coil and a position sensor; an axis fixed to the stator; and a rotor having a permanent magnet. The rotor rotates around the axis. The rotor is linked to a driven member that is driven by the brushless motor. | 02-05-2009 |
20090206602 | FLUID POWER GENERATOR - The fluid power generator is provided. The fluid power generator includes: a first member that has multiple coils; a second member that is rotatable relative to the first member and that has multiple permanent magnets; a rotating member that is mechanically linked with either one of the first member and the second member to rotate by fluid force; and a clearance controller that moves at least one of the first member and the second member to thereby change a clearance between the first member and the second member, wherein the clearance controller changes the clearance in such a manner as to make the clearance smaller after a start of rotation of the rotating member than before the start of rotation of the rotating member. | 08-20-2009 |
20090206607 | POWER GENERATOR AND MOTOR DEVICE - The fluid power generator is provided. The fluid power generator includes: a rotating member that rotates by fluid force; a generator motor that is mechanically linked with the rotating member and that is configured to function both as a generator and as a motor; a rotation speed meter that measures a rotation speed of the generator motor; and a controller that controls the generator motor, wherein the controller has a control mode to keep the rotation of the rotating member irrespective of a variation in flow rate of the fluid. | 08-20-2009 |
20100052458 | BRUSHLESS ELECTRIC MACHINE AND DEVICE COMPRISING SAID MACHINE - To provide a technique that improves an efficiency of using a magnetic field in a brushless electric machine. A brushless electric machine includes a first member having N sets (N is an integer of 2 or more) of electromagnetic groups, and a second member that has N+1 sets of magnetic field forming member groups and can move in a predetermined moving direction in relative to the first member. One set of the electromagnetic coil group and one set of the magnetic field forming member group are alternately disposed along a direction perpendicular to the moving direction. | 03-04-2010 |
20100225261 | ENERGY CONVERTER AND ELECTROMECHANICAL APPARATUS - An energy converter includes magnetic coils of N phases (N is an integer of 3 or more), and a PWM drive circuit for driving the magnetic coils of N phases, wherein the magnetic coil of each phase can be independently controlled by the PWM drive circuit. | 09-09-2010 |
20110291532 | CORELESS ELECTROMECHANICAL DEVICE - A coreless electromechanical device having a first and second member which are movable relative to each other, includes: a permanent magnet disposed on the first member; an air-cored electromagnetic coil disposed on the second member; and a coil back yoke which, being disposed on the second member, has a stacked structure, wherein the electromagnetic coil is disposed between the permanent magnet and coil back yoke, the electromagnetic coil has an active coil region, in which a force causing the first member to move relatively in a movement direction is generated in the electromagnetic coil, and coil end regions, and the coil back yoke covers the active coil region, but does not cover the coil end regions. | 12-01-2011 |
20120206079 | ENERGY CONVERTER AND ELECTROMECHANICAL APPARATUS - An energy converter includes magnetic coils of N phases (N is an integer of 3 or more), and a PWM drive circuit for driving the magnetic coils of N phases, wherein the magnetic coil of each phase can be independently controlled by the PWM drive circuit. | 08-16-2012 |
20120293035 | CORELESS ELECTRIC MACHINE APPARATUS, MOVING BODY AND ROBOT - A coreless electric machine apparatus includes: a permanent magnet arranged on the first member; two-phase coreless electromagnetic coils arranged on the second member; a coil back yoke arranged on the second member, wherein the electromagnetic coils include effective coil areas for generating a force to move the first member relatively to the second member, and coil end areas, the effective coil areas of the two-phase electromagnetic coils have same shape and are arranged in a cylindrical area between the permanent magnet and the coil back yoke, the coil end area of a first phase electromagnetic coil of the two-phase electromagnetic coils is bent in an inside direction or an outside direction of the cylindrical surface, the two-phase electromagnetic coils have same electric resistance value, and the coil back yoke covers outer peripheral areas of the effective coil areas and does not cover outer peripheral areas of the coil end areas. | 11-22-2012 |
20120306310 | CORELESS ELECTRIC MACHINE APPARATUS, MOVING BODY, ROBOT AND MANUFACTURING METHOD OF THE CORELESS ELECTRIC MACHINE APPARATUS - A coreless electric machine includes: a permanent magnet on a first member; N-phase (N≧2) air-core electromagnetic coils on a second member; and a coil back yoke on the second member, each electromagnetic coil including a conductor bundle in which a conductor is wound M times (M≧2), coil sub-aggregates are provided, each including the N electromagnetic coils of the respective N phases and in each of which a conductor bundle forming an effective coil area of a first-phase electromagnetic coil contacts a second conductor bundle forming an effective coil area of another phase electromagnetic coil, and the second conductor bundle is in an air-core portion of the first phase electromagnetic coil, and the coil sub-aggregates are arranged along the cylindrical area, in which the coil sub-aggregates do not overlap in a radiation direction of the cylindrical area, and adjacent coil sub-aggregates contact each other. | 12-06-2012 |
20130082560 | CORELESS ELECTROMECHANICAL DEVICE, MOBILE UNIT, ROBOT, AND MANUFACTURING METHOD OF CORELESS ELECTROMECHANICAL DEVICE - A coreless electromechanical device includes permanent magnets provided in a first member, M (M is an integer number equal to or more than two) phases of α-wound air core electromagnetic coils provided in a second member, and a coil back yoke provided in the second member, wherein the electromagnetic coil has two effective coil regions that generate force for relative rotational transfer of the first member with respect to the second member and two coil end regions, and the coil end regions of at least the (M-1) phases of electromagnetic coils of the M phases of electromagnetic coils are bent toward an inner circumference side or an outer circumference side of a cylindrical surface containing the cylindrical region so as not to interfere with the coil end regions of the other phases of electromagnetic coils. | 04-04-2013 |