A motor control device includes: a storage configured to store reference Lissajous values; and a controller configured to apply an excitation signal to a resolver; receive an output signal output from the resolver, to obtain a Lissajous value corresponding to the received output signal, to determine that an external noise is input when the obtained Lissajous value is different from the reference Lissajous values, and to control driving of a motor based on the obtained Lissajous value when the obtained Lissajous value is equal to any one of the reference Lissajous values. A vehicle having the motor control device may further include a battery configured to transmit power to the motor and to be charged by regenerative braking of the motor.

Techniques, methods, systems, and other mechanisms for measuring the excursion of a speaker while being actively driven. Measuring excursion can involve attaching a flexible printed coil (FPC), including a sense coil, to the speaker, and monitoring an induced current as produced though the sense coil, and further detecting that violation of an excursion limit for the speaker may likely occur.

In a related-art resolver, a front and a back of a stator core cannot be distinguished, and it is difficult to mass-produce the resolver while matching directions of shear drops and burrs. Thus, assembly accuracy of the resolver is degraded. Further, productivity and assembling ability are degraded because electromagnetic steel sheets are laminated by rotary lamination. The present invention provides a resolver including: a resolver stator including: a stator core formed of electromagnetic steel sheets, which have teeth, and are laminated without rotary lamination; a one-phase excitation winding; and two-phase output windings; and a resolver rotor arranged to be opposed to the resolver stator, in which the stator core has marks which enable distinction of a rolling direction of the stator core and distinction of a front and a back of the stator core.

A rotation angle detection apparatus includes a movable pattern prepared on an outer peripheral side surface of a rotary shaft and having a shape that changes along a circumferential direction of the outer peripheral side surface; and a stationary pattern fixedly arranged around the rotary shaft so as to face the movable pattern. An overlapping state between the movable pattern and the stationary pattern changes by rotation of the rotary shaft. A physical quantity changing according to a change in the overlapping state between the movable pattern and the stationary pattern is detected, and a rotation angle of the rotary shaft is detected based on the physical quantity.

In accordance with one embodiment of the present disclosure, an inductive position sensor assembly is provided. The inductive sensor assembly includes a sensor and a coupler element. The sensor includes a transmitter coil having an inner diameter and an outer diameter and a receiver coil positioned within the outer diameter of the transmitter coil. The coupler element has a geometric continuous curve shape. The coupler element is positioned within the outer diameter of the transmitter coil such that a maximum diameter of the geometric continuous curve shape is the outer diameter of the transmitter coil. When the coupler element is moved, the geometric continuous curve shape of the coupler element modify an inductive coupling between the transmitter coil and the receiver coil.

A camera module includes a lens barrel configured to be movable; a detection target disposed on one side of the lens barrel; an integrated coil and a sensing coil facing the detection target and disposed in a direction perpendicular to a direction of movement of the lens barrel; a driver configured to apply a driving signal to the integrated coil; and a position detector configured to detect a position of the lens barrel according to an inductance of the integrated coil and an inductance of the sensing coil, wherein a width of the integrated coil in the direction perpendicular to the direction of movement of the lens barrel and a width of the sensing coil in the direction perpendicular to the direction of movement of the lens barrel change in the direction of movement of the lens barrel.

A sensor system includes a sensor that includes a RLC tank having a first input impedance. The RLC tank includes a first coupling inductor. The sensor system also includes a reader that includes a -RLC tank having a second input impedance. Characteristically, the -RLC tank includes a second coupling inductor inductively coupled to the first coupling inductor wherein the first input impedance multiplied by i is approximately equal to the complex conjugate of the second input impedance multiplied by i at one or more predetermined frequencies.

Provided is a position indicator of an electromagnetic induction type including a position indicator cartridge housed in a hollow portion of a housing, in which the position indicator cartridge includes a first resonant circuit including a first coil wound around a magnetic core arranged on one end of the position indicator cartridge in an axial direction of the position indicator cartridge and a first capacitor, a second coil that is independent of the position indicator cartridge provided outside of the position indicator cartridge, at a position where the second coil, in operation, is magnetically coupled to the first coil of the position indicator cartridge, and a switch turned on and off by an operation portion provided outside of the position indicator cartridge, the operation portion, in operation, receiving an operation of a user, and a closed circuit including the second coil is formed when the switch is turned on.

A receiver coil of an inductive angular position sensor can have circuit features that become smaller than reasonable for high resolution measurement designs. This is especially true when multiple receiver coils are used, such as in a three-phase configuration, and when each of the multiple receiver coils is in a twisted loop configuration. The disclosed inductive angular position sensor utilizes different spatial frequencies for a rotor coil and the receiver coils. For example, the spatial frequency of the receiver coils may be kept smaller than the rotor coil. In this condition, the fundamental frequency of the angular position sensor is shifted to the least common multiple of the spatial frequencies, making the angular resolution of the inductive angular position sensor high, while the circuit features of the receiver coils are maintained at a reasonable size.

An embodiment relates to a sensing magnet assembly and a motor including the same, the sensing magnet assembly comprising: a sensing plate; a sensing magnet disposed on the plate; and an adhesive tape disposed between the sensing plate and the sensing magnet so as to fix the sensing magnet to the sensing plate, wherein the sensing plate includes a main body in which the adhesive tape is disposed, the main body includes a seating surface and a plurality of grooves or holes, and one side of the adhesive tape is disposed on the seating surface. Accordingly, the adhesive strength between the sensing magnet and the sensing plate can be improved.