摘要:
Provided is a commutator of a motor including a body and hooks forming coil-receiving spaces between the body and inner surfaces of the hooks, wherein the hooks include recesses concavely formed on the inner surfaces of the hooks, and coils are seated on the recesses. Thus the present disclosure provides an advantageous effect of increasing fixing force of the hooks.
摘要:
There is provided a cooling structure whose performance for cooling ring members and brushes is enhanced. In a cooling structure applied to a slip ring device including ring members provided to an input shaft and brushes contacting with these ring members, the input shaft includes a shaft member where an external spline portion is formed, and a cylindrical member that is installed over the external circumference of the shaft member so that an internal spline portion formed on the cylindrical member is meshed with the external spline portion, and that the ring members are fixed to the cylindrical member. The internal spline portion is formed upon a portion of the inner circumferential surface of the cylindrical member that lies on the radially inward side of the ring members.
摘要:
An electrical rotating machine, such as a generator or motor, communicates power from a stationary location to the rotating rotor of the rotating machine via opposed pairs of capacitor plates, one plate of each pair rotating with the rotor and one plate of each pair fixed not to rotate. In one embodiment, separation between the plates of the pair is provided by a cushion of entrapped air.
摘要:
A rotor for a slip ring motor includes a hollow shaft with an open end, a plurality of electric cables, and a cable guide arranged in the open end guiding the electric cables from inside the hollow shaft towards connection points of the electric cables outside of the hollow shaft.
摘要:
A brushed motor includes a rotation shaft, a commutator including a plurality of segments separated by a plurality of undercuts arranged at unequal intervals, an armature, a plurality of permanent magnets, a voltage equalizing line, a positive electrode brush, and a negative electrode brush. When Pz is the number of the permanent magnets and N is the number of the segments, a relationship of N=Pz(K−0.5) is satisfied. Pz is an even number that is greater than or equal to four. K is a constant and is a natural number that is greater than or equal to two. The plurality of undercuts includes at least one set of undercuts arranged at an undercut interval that differs from a reference angle θz. The reference angle θz is specified by a relational expression of θz=(360 degrees/Pz)±(360 degrees/2N).
摘要:
A valve timing control device for an internal combustion engine is provided which is devised to shorten an axial length of a brush retaining portion of a retaining member and thereby reduce in size whole of the device.The retaining member 28 attached to a cover member includes a power-feeding brush 30a, 30b in a brush guide portion 29a, 29b of the brush retaining portion 28a. The power-feeding brush is slidable and in contact with a slip ring 26a, 26b provided to an electric motor. A concave-groove-shaped spring receiving chamber 41 is provided lateral to the brush guide portion such that the spring receiving chamber is in parallel with the power-feeding brush. A torsion coil spring 42 that biases the power-feeding brush toward the slip ring via its another end portion 42c is provided in the spring receiving chamber.
摘要:
Provided is an electric-motor-driven valve timing control device for an internal combustion engine with which the valve timing control device can be operated even when a portion of coils of an electric motor has broken. The electric motor has two systems of switching brushes, each system being constructed by a set of positive-electrode and negative-electrode switching brushes. When an electricity-feeding line used for electricity-feeding to one system of the two systems has broken, the valve timing control device is configured to stop energization to the other system or reduce an energization amount to the other system, after having energized the other system of switching brushes until such time that a predetermined time has expired from a start of the engine, thus enabling the relative rotational phase of a camshaft to be converted to a phase suitable for starting.
摘要:
A power conversion and distribution system. In one embodiment low voltage source components convert a high voltage AC power source to a relatively low voltage supply and provide a direct current output. First superconductor wires carry current from the low voltage source components to a load, and second superconductor wires carry current from the load to the low voltage source components. Individual ones of the first wires are grouped with individual ones of the second wires so that wires connected to carry current in opposite directions are in such sufficiently close proximity that additives of self-fields generated by individual ones of the wires during power transmission result in reduction of the magnetic fringe field generated, thereby increasing the current carrying capacity of the wires.
摘要:
A brush holder has a core side position regulator engaged with a first connection plate to regulate a relative position. The core side position regulator has a projection part projected toward an armature core in the axial direction, and a fitting groove portion defined on both sides of the projection part in a circumferential direction. The relative position in the circumferential direction is regulated by an engagement between the projection part and a slit of the first connection plate. The relative position in the axial direction is regulated by an engagement between sides of the slit and the fitting groove portion. A width of the projection part in the circumferential direction is larger than a width of a brush in the circumferential direction.
摘要:
An electric motor-generator with a plurality of field coils spaced about the periphery of a stator, and a plurality of permanent magnets spaced about the periphery of each of a pair of rotors, the pair of rotors disposed one on each side of the stator, such that during rotation of the rotors, a center of each magnet generally passes across a center of each coil.The magnets arrayed on respective rotors in alternate pole orientation N-S S-N, the magnets of one rotor offset from the magnets of the other rotor by one pole orientation, such that as a N pole on the one rotor is passing directly across one end of a field coil, a S pole of a corresponding magnet on the other rotor is passing directly across the other end of the field coll.A rotary electrical switch enables paired alternating periods of current flow and no current flow into respective stator field coils, such that in a period pair the period of current flow is shorter than the period of no current flow. A series of high capacity capacitors is wired in parallel with the field coil power supply such that the capacitors alternately discharge into the field coils when the field coils are switched ‘on’ In a motor mode, and the capacitors are charged by power from the field coils when the field coils are switched ‘off’ and are operating in a generator mode.