Abstract: Embodiments pertain to a system configured to provide a music learning session to a user. The system comprises a memory for storing data and executable instructions; and a processor that is configured to execute the executable instructions to result in performing the following steps: presenting the user with a representation of a musical piece to be played by the user with a music instrument; receiving an audio signal relating to an instrument output provided by the music instrument played by the user; and determining a level of correspondence between the received audio signal and the representation of the musical piece presented to the user. The steps may further comprises identifying an audio signal portion for which a determined level of correspondence does not meet a correspondence criterion; and determining an error characteristic for the identified audio signal portion.

Abstract: A wind power generator set, an electromagnetic device and a heat exchange or drying device for an iron core. The heat exchange or drying device for an iron core includes a sprayer capable of feeding an airflow, wherein the sprayer is provided with a spraying hole, and the airflow can be sprayed to an end of the iron core through the spraying hole. The sprayer sprays a cold airflow or a hot airflow at the end of the iron core, creating a cooling and drying environment at the end of the iron core. This facilitates the heat dissipation of the iron core and also the maintenance of the insulation performance of an end of a winding, including the insulation of the winding itself and the insulation between the winding and the iron core, and also the protection of a magnetic pole and a protective covering layer thereof.

Abstract: A rotor includes a shaft made of a stainless steel, an annular rotor core surrounding the shaft from an outer side in a radial direction about a center axis of the shaft, a magnet attached to the rotor core, and a separating portion provided between the shaft and the rotor core and having electric insulation property. The magnet constitutes a first magnetic pole, and a part of the rotor core constitutes a second magnetic pole. The rotor core has an inner circumference facing the shaft and an outer circumference opposite to the inner circumference. A radius R1 of the shaft and a maximum distance R2 from the center axis to the outer circumference of the rotor core satisfy R1/R2?0.20.

Abstract: A pitch changer system for a string musical instrument, including a lever assembly, a rotating saddle assembly, a swing plate, and a lever tensioning assembly. Applying force to move the lever in a first direction forces a bell crank matingly coupled to the lever into rotation such that a coupling system of the lever tensioning assembly causes the swing plate to force a rotating saddle of the rotating saddle assembly into rotation to elongate and thereby temporarily change the pitch of a string coupled to the rotating saddle.

Abstract: An electromagnetic linear actuator, which comprises a first and a second element. One element is a magnetic oscillator with at least one magnet, and the other element is a magnetic stator with at least one magnet. The two elements are movable relatively linearly to one another and the magnetization directions of the oscillator and of the stator are parallel. Either the stator comprises two opposing identical stator poles or the oscillator comprises two opposing identical oscillator poles. Furthermore, a method for producing a mechanical movement by means of an actuator. Either magnetization of a stator of the actuator takes place such that the stator comprises two opposing identical stator poles, or magnetization of an oscillator of the actuator takes place such that the oscillator comprises two opposing identical oscillator poles.

Abstract: An end housing portion of a rotating electric machine is partitioned by a partition plate into a first space on the side where a cooling cooler is present and a second space on the side where a coil end portion is present. The partition plate has, at a radially outer end, an intake port that opens in the circumferential direction. A shield plate which is a magnetically high-conductive metal plate is provided so as to be connected to the radially inner side from the intake port of the partition plate and arranged along the circumferential direction of the frame. A ventilation path D is formed between the shield plate and the frame so as to communicate with the intake port.

Abstract: A modular mounting system may include multiple parts couplable together to form a customizable assembly of parts. The parts may have a variety of lengths, depths, and heights and a rectangular prism shape or a rectangular wedge shape. A first part may have a first set of coupling holes on a first side surface for aligning with a second set of coupling holes on a second side surface of a second part. The first part may have a first cable routing opening for aligning with a second cable routing opening of the second part. The second part may couple to the first part at a front position and a third part may couple to the first part in a rear position and adjacent to the second part. Additional parts (e.g., a fourth part, a fifth part, etc.) may couple to the first part, the second part, and/or the third part.

Abstract: Disclosed is an improved pivot or bridge plate that may be constructed originally or may be used to retrofit existing stringed instruments.

Abstract: A drumhead includes a membrane with ferrous responsive material printed onto a surface or otherwise incorporated into it. The ferrous responsive material is detectable by an electromagnetic sensor such that striking the membrane causes vibration that is detected by the sensor, which may initiate an acoustic sound via a sound module. The drumhead may thus be used in an electronic drumming system without requiring fixation of a foreign object to a surface of the membrane.

Abstract: A bow hold training device includes a replica bow stick shaft, a replica bow stick frog extending from a bottom side of the replica bow stick shaft, and at least one landmark corresponding to a contact point of a finger or thumb with a proper bow hold on the bow hold training device. The device helps musicians learn and reproduce a proper bow hold for playing a stringed instrument, such as a violin, viola, cello, or bass.

Abstract: A motor includes a rotor, and a stator that generates a magnetic field to rotate the rotor. The stator includes a plurality of teeth, a plurality of winding wires including a winding portion wound around each of the plurality of teeth, a neutral wire provided on one end side of the winding portion, and a power wire provided on the other end side of the winding portion, and a plurality of neutral points at which a plurality of the neutral wires is electrically connected by connection terminals. The plurality of neutral wires includes a plurality of first fixation portions in which the plurality of neutral wires is fixed to each other in positions that are on a winding portion side compared to the plurality of neutral points, and a second fixation portion in which the plurality of neutral wires is fixed to each other from the plurality of first fixation portions to the plurality of neutral points.

Abstract: An embodiment relates to a motor including a shaft; a rotor which is coupled to the shaft; a stator which is disposed outside the rotor; a housing which accommodates the rotor and the stator and has an opening formed at one side thereof; and a cover which covers the opening. The cover includes a cover plate portion; and a side wall which extends axially from the cover plate portion, and at least three grooves are formed in the side wall. Accordingly, the motor according to the embodiment can guarantee the sealing performance while preventing the bearing from being damaged when the rotor is assembled on the inside of the stator.

Abstract: An object of the present invention is to provide a wheel drive device capable of suppressing a temperature increase in an electric motor and a power conversion device and suppressing occurrence of a failure of an electric component. Provided are: an electric motor having a stator 60 and a rotor 40; a stator holder 80 that holds the stator 60; a power conversion device 100 that converts power supplied to the electric motor; and a wheel which accommodates the electric motor, the stator holder 80, and the power conversion device 100 on the inner peripheral side. The stator holder 80 includes a flow path 90 through which a cooling medium flows. The flow path 90 is arranged between the stator 60 and the power conversion device 100.

Abstract: The musical instrument tuner includes: a sensor device that is attached to a musical instrument; and an operation device that is able to perform wireless communication mutually with the sensor device, in which the sensor device includes an acceleration sensor that has at least two detection axes, frequency detection means for detecting, as a detected frequency, a frequency of a vibration of musical sound generated through an operation of the musical instrument based on an output from the acceleration sensor, and sensor-side communication means for transmitting transmission information including information regarding the detected frequency to the operation device, and the operation device includes operation-side communication means for receiving the transmission information transmitted from the sensor device, display means, and control means for generating tuning information of the musical instrument and causing the display means to display the tuning information based on the transmission information received

Abstract: A system for re-hairing a bow of a musical instrument provides a bow tip insert configured to install into a tip cavity within a tip of the bow, wherein the bow tip insert is configured to non-permanently secure to the tip of the bow, and wherein the bow tip insert is further configured to affix bow hair to the bow when the bow tip insert is installed in the tip cavity.

Abstract: A hand-pulled instrument, such as an accordion, typically has a sound post (or reed post) on which several reed plates are mounted. The reed plate usually has two oblong openings. Each opening relates to an elongated reed, which is widened at one of its two longitudinal ends for attachment to the reed plate. The opposite long end of the reed is not further fixed. The reed can be made to vibrate in a way that it partially swings into the associated opening. If air flows through the opening, in particular, due to a movement of a bellows of the hand-pulled instrument, such vibration can be generated, and in this way, an audible tone is produced. The reeds are usually attached to the reed plate with a rivet.

Abstract: An embodiment relates to a motor comprising: a shaft; a rotor coupled to the shaft; and a stator disposed on the outside of the rotor, wherein the stator comprises a stator core, an insulator disposed on the stator core, and a coil wound around the insulator, and the stator core is formed by arranging a plurality of unit stator cores in the circumferential direction, and a welded portion is formed by welding regions where unit yokes of the unit stator cores meet each other on the upper side and the lower side of the stator core. Accordingly, cogging torque and torque ripple of the motor may be reduced.

Abstract: Disclosed in the present invention are a cooling system, a stator assembly, and an axial magnetic field motor. The cooling system is used for cooling of a stator core, comprises a housing and an enclosed cavity for containing the stator core, and further comprises: a liquid spraying cavity provided on the housing and used for containing liquid; a liquid inlet in communication with the liquid spraying cavity; a liquid outlet in communication with the enclosed cavity; and a liquid spraying assembly provided on an inner wall, corresponding to the stator core, of the housing.

Abstract: This embodiment relates to a motor comprising: a housing; a stator disposed within the housing; a rotor disposed inside the stator; and a shaft coupled to the rotor. The housing includes a body and a plurality of protrusions that protrude inward from the inner circumferential surface of the body, and the stator includes a stator core and a coil wound on the stator core. The inner surfaces, which are the inside surfaces of the protrusions, are in contact with the outer circumferential surface of the stator core, and the protrusions are disposed spaced apart at predetermined intervals along the circumferential direction such that gaps (G) are formed in the radial direction between the outer circumferential surface of the stator core and the inner circumferential surface of the body. Accordingly, the protrusions formed on the housing of the motor reduce the amount of contact between the housing and the stator core, and can thus improve friction torque performance.

Abstract: A Stator includes: an iron core formed in an annular shape; winding wound around the iron core; an insulator (3) configured to insulate the iron core from the winding; a substrate (6); and a terminal pin (12) configured to connect the winding to the substrate (6). The substrate (6) includes a through hole configured to penetrate the substrate (6) and cause an iron-core facing face (6a) and a back face (6b) to communicate. The terminal pin (12) includes: with the terminal pin (12) penetrating the through hole, an upper connection part (5a) provided at a distance from the back face (b) in a direction opposite to the iron core and connected to the winding; and a lower connection part (5b) provided in the vicinity of the through hole, arranged independently of the upper connection part (5a), and connected to the substrate (6).