Mitsubishi Electric Corporation

Mitsubishi Electric Cornoration

Toshihiro Matsunaga

Yoshihito Asao

Takahiro Mori

Hiroko Ikeda

Tatsuya Mori

Kenji Ikeda

Kenta Kubo

Takashi Yamamoto

Toru Kimura

Kazuhisa Takashima

Hideki Miyatake

Satoru Akutsu

Tadahiro Yoshida

Masatsugu Nakano

Naoki Tanaka

Seiji Sawada

Takayuki Nakao

Masahiro Arioka

Yusuke Morita

Akira Kimishima

Shohei Fujikura

Mitsunori Ishizaki

Munetaka Kashiwa

Yosuke Sugino

Kazumasa Ito

Akihiro Yamamura

Shinichi Yamaguchi

Yuji Takizawa

Mitoru Yabe

Shintaro Yamada

Akihiko Morikawa

Katsuhiko Horinouchi

Mitsuru Tsukima

Toshie Takeuchi

Kodai Okazaki

Kenta Motoyoshi

Koichi Kagawa

Kengo Fujimoto

Masayuki Kakio

Masahiko Orii

Akihiko Maruyama

Masayuki Miyaoka

Misa Nakayama

Yoshiki Yoshioka

Kenji Onishi

Hiroki Maeda

The redundant resolver includes: a resolver body having a rotor, a stator opposed to the rotor and having Ns teeth arranged in a circumferential direction, and an excitation winding and two phases of output windings wound on the stator; an excitation circuit configured to supply power to the excitation winding; and an angle calculation unit configured to calculate a rotation angle on the basis of signals from the two phases of output windings. The stator is divided in the circumferential direction into M pieces which serve as M tooth blocks, N (M≥N) redundancy systems are formed on the basis of the M tooth blocks. The excitation circuit and the angle calculation unit are provided to each system so as be independent among the systems. Gap magnetic flux densities at both end portions of each tooth block are set to change mildly.

Redundant resolver and electric power steering device mounted therewith

Provided is a resolver capable of increasing an accuracy of a detected angle of the resolver. The resolver includes: a stator; and a rotor, wherein the rotor includes a plurality of salient poles; wherein the stator includes: a stator core having a plurality of teeth, and a plurality of winding groups each of which is provided on each of the plurality of teeth, wherein the winding groups are divided into two systems, wherein the numbers of turns of the excitation windings are distributed in a form of a sine wave of N-th spatial order, wherein each of the numbers of turns of a first output windings and the numbers of turns of a second output windings are distributed in a form of a sine wave of |N±N|-th spatial order, and wherein the following expressions are satisfied,cos{||(−1)/×2π+α},cos{||(−1)/×2π+β}, and90(deg)<|α−β|<140(deg).

Resolver and electric power steering device

To provide an abnormality detection apparatus for resolver which can determine the abnormality of at least the first system, even if the period of the excitation AC voltage of the first system and the period of the excitation AC voltage of the second system are different periods, and the magnetic interference between systems occurs. An abnormality detection apparatus for resolver applies an AC voltage of a first period to a first system excitation winding; applies an AC voltage of a second period different from the first period to a second system excitation winding; calculates a first system square sum which is a sum of square values of the detection values of output signals of first system two output windings after the second period component reduction processing: and determines abnormality of first system based on whether or not the first system square sum is within a normal range of first system.

Abnormality detection apparatus for resolver

The rotating electrical machine disclosed in the present application provides a rotor shafts supported by bearings, a rotor attached to the rotor shaft and rotates with the rotor shaft, a stator that surrounds the rotor through a gap so that the rotor can rotate, a frame that surrounds the rotor and the stator, an outer circumference of the stator is attached to an inner circumference of the frame, and an annular member provided along the inner circumference of the frame to prevent foreign matter existing at the boundary part between the frame and the stator from moving to a region different from the boundary part, it prevents foreign matter generated in the manufacturing process of the rotating electrical machine, such as shavings of a frame, from being scattered inside the rotating electrical machine.

Rotating electrical machine

A resolver body including a rotor having Nx (Nx is a natural number) salient poles, a stator facing the rotor and having Ns (Ns is an integer equal to or larger than 3) teeth arranged in a circumferential direction, and an excitation winding and two phases of output windings wound on each tooth; and an excitation circuit configured to apply voltage to the excitation winding. The excitation winding and the two phases of output windings wound on each of Nsm (Nsm is an integer equal to or larger than 2) teeth among the Ns teeth are set to be of a main system. The excitation winding and the two phases of output windings wound on each of Ns-Nsm teeth are set to be of a sub-system. The number Nsm of the teeth corresponding to the main system is larger than the number Ns-Nsm of the teeth corresponding to the sub-system.

Redundant resolver and electric power steering device equipped with redundant resolver

For the purpose of preventing damage to the frame when assembling the stator, improving the holding force for holding the stator, and making it possible to reduce the size of the rotating electrical machine body in the radial direction, the rotating electrical machine with integrated control device for vehicles integrates the rotating electrical machine main body and the control device arranged on the rear side of the rotating electrical machine main body and controlling the rotating electrical machine, the rotating electrical machine main body provides a first annular shape member located between the stator and the frame, a second annular shape member located between the and the first annular shape member, the stator is press-fitted into the frame via the first annular shape member and the second annular shape member.

Rotating electrical machine with stator with annular shaped members between frame and stator core and having integrated control device for vehicles

To solve a problem that the accuracy of angle detection deteriorates owing to noise voltage generated by eccentricity or variation in shape among rotors according to the number of magnetic poles of a rotor core of a multiple-system rotation sensor, the number S of magnetic poles of a stator core is, with the number R of the magnetic poles of the rotor core and the number N (N is a natural number equal to or larger than 2) of systems for stator windings, in a relationship of S=nRN (n is a natural number), system windings of each system are wound so as to be divided for every R magnetic poles among the S magnetic poles of the stator core, and a winding arrangement of the system windings of each system is made so as to achieve R-times rotational symmetry about a rotor rotation axis.

Multiple-system rotation sensor, and electric power steering device provided with multiple-system rotation sensor

To provide an abnormality detection apparatus for resolver which can determine the abnormality of at least the first system, even if the period of the excitation AC voltage of the first system and the period of the excitation AC voltage of the second system are different periods, and the magnetic interference between systems occurs. An abnormality detection apparatus for resolver applies an AC voltage of a first period to a first system excitation winding; applies an AC voltage of a second period different from the first period to a second system excitation winding; calculates DC values of first system two output signals by performing a DC extraction processing; and determines abnormality of first system based on whether or not the DC values of first system two output signals are within a normal range.

In an electric motor control device which controls rotation of an AC electric motor having two sets of three-phase windings and provided with a resolver having two systems by calculating voltage command values on dq axes, dq conversion of currents of first three-phase windings is performed using a first angle calculated from output of the first system of the resolver, and dq conversion of currents of second three-phase windings is performed using a second angle calculated from output of the second system of the resolver. With both d-axis current command values set at the same value, respective voltage command values on dq axes are calculated and respectively converted into voltage command values for voltage application to the first three-phase windings, using the first angle, and converted into voltage command values for voltage application to the second three-phase windings, using the second angle.

Electric motor control device

A resolver device with redundancy, wherein winding groups of different systems are arranged at different positions in a circumferential direction of a stator core. The winding groups of each system include: an excitation winding group consisting of a plurality of excitation windings, each of which is connected to a corresponding one of plural excitation circuits; and a first output winding group; and a second output winding group. Each of the stator teeth has a corresponding one of the excitation windings wound therearound. When two of the excitation windings belonging to different systems, arranged side by side in the circumferential direction of the stator core, are defined as a first end excitation winding and a second end excitation winding, respectively, the first end excitation winding and the second end excitation winding are supplied with excitation signals which generate magnetic fluxes in the same (not opposite) radial directions of the stator core.

Redundancy resolver device and electric power steering device

A rotating electrical machine includes an annular coil connection body provided coaxially with a stator. The coil connection body has, in a groove provided on a holder, an overhang portion for restricting an axial-direction movement of a terminal, and a positioning projection for restricting a radial-direction movement of the terminal. The positioning projection positions the terminal such that a part of the terminal overlaps the overhang portion in the axial direction. In this structure, when the terminal moves in a direction from a terminal holding portion toward a groove opening, the terminal comes into contact with a side surface of the overhang portion, whereby lifting and coming-off of the terminal can be prevented.

Even using the redundant system resolver in which the magnetic interference between systems occurs, to provide an angle detection apparatus which can reduces the influence of the magnetic interference and can calculate the rotational angle with good accuracy, without performing synchronous control between systems in real time. An angle detection apparatus is provided with a resolver which has the first system windings and the second system windings in which magnetic interference occurs between systems; a first system removal processing unit that performs a second cycle component removal processing which removes component of the second cycle of the second system, to detection values of the first system winding output signals; and a first system angle calculation unit that calculates a first angle of rotor, based on the detection values of the first system winding output signals after the second cycle component removal processing.

Angle detection apparatus

To provide an AC rotary machine apparatus which can determine the operation stop of the control circuit of the other system with good accuracy. An AC rotary machine apparatus, including: a resolver is provided with a first system excitation winding, first system two output windings, a second system excitation winding, and second system two output windings, in which a magnetic interference occurs between a first system and a second system; a first system control circuit that applies AC voltage with a first period to the first system excitation winding; and a second system control circuit that applies AC voltage with a second period to the second system excitation winding, wherein the first system control circuit determines whether the operation of the second system control circuit stops, based on the components of the second period extracted from the first system output signals.

AC rotary machine apparatus

A control device-integrated rotary electric machine that has a light weight and a small radial-direction dimension. A cylindrical member is provided between a stator formed by stacking electromagnetic steel sheets and a frame retaining the stator, such that the cylindrical member is in a press-fitted state against the stator and the frame. The cylindrical member has a flange portion at one end thereof, and the flange portion is fixed by being held between the frame and a heat sink which is a member composing a control device.

Control device-integrated rotary electric machine

A redundant resolver is configured of a stator and a rotor that form a pair, wherein the rotor is a rotor with a shaft angle multiplier of Nx having Nx (Nx is a natural number) salient poles, the stator is such that n teeth Tto Tn, where n is a natural number, are disposed sequentially in a circumferential direction, configuring M systems by being divided into M in the circumferential direction, and having an angle of 360/M degrees when angles of the teeth configuring one system are totaled, a one-phase excitation winding and a two-phase output winding are wound around each of the teeth Tto Tn, excitation signals of the same frequency are applied by differing excitation circuits to the respective excitation windings, an output order per system is Nout (Nout is a natural number), and an abnormality is detected based on output signals of the M systems.

Redundant resolver and rotation angle detection device using same

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Tokyo, Japan

Toshihiro Matsunaga