Mitsubishi Electric Corporation

Oki Electric Industry Co., Ltd.

Oki Electric Co., Ltd.

Shinji Kawaguchi

Kenichiro Hosoda

Hiromi Ando

Atsushi Fukasawa

Ryoichi Miyamoto

Nobuhiro Kihara

Masaya Inoue

Hiroshi Okuda

Takahiro Urakabe

Fumito Uemura

Naoki Itoi

Kota Katsuragi

Masayoshi Maeda

Kohei Yasuda

Kenji Ishi

Atsushi Shinbo

Kiyoshi Yokota

A stator winding for a rotating electric machine includes: a plurality of lead wires each including a conductor and an insulating film provided on side surfaces of the conductor; and a joining portion configured to join terminal portions of the plurality of lead wires to each other. The plurality of lead wires each includes: a conductor exposure portion provided at a portion of the terminal portion at which the terminal portions of the plurality of lead wires face each other, has the conductor exposed thereat, and has the joining portion connected thereto; and an insulating film remainder portion, provided at a portion of the terminal portion of the lead wire excluding the conductor exposure portion, and has the conductor covered with the insulating film, and a portion of the insulating film in the insulating film remainder portion is provided in a periphery of the joining portion.

Stator winding for rotating electric machine, and manufacturing method therefor

Provided is a power supply device including: a magneto generator (), which includes: a rotor including a magnet forming a magnetic field; and a stator which generates an alternating current in stator windings by rotation of the rotor; a rectifying unit () which rectifies the alternating current generated by the magneto generator to a direct current; a variable transformation-ratio direct current voltage transformer () which transforms an output voltage of the direct current of the rectifying unit to a voltage between input terminals of an electrical load () to which electric power is supplied; and a voltage control unit () which controls a transformation ratio of the variable transformation-ratio direct current voltage transformer in accordance with at least one of an operating state signal regarding the rotation of the rotor of the magneto generator and an electrical load state signal of the electrical load.

Power supply device

In an ADPCM encoding and decoding system comprising an encoder having an adaptive predictor and an adaptive quantizer and a decoder having an adaptive predictor and an inverse adaptive quantizer, the adaptive predictors each comprise: an adaptive-zero predictor of an arbitrary order and an adaptive-pole predictor of an arbitrary order, for input signals with time-varying frequency components; a fixed-pole predictor of an arbitrary order, for input signals the frequency composition of which remains substantially invariant over time; and an offset predictor for rejecting an offset component of the input signals, these elements being connected in series. The adaptive-zero and adaptive-pole predictors generate estimates for voice signals with time-varying frequency components. The fixed-pole predictor generates estimates for voiceband data signals the frequency components of which remain substantially invariant over time. The adaptive predictors effectively operate for voice and voiceband data signals, providing a higher prediction gain. The quantizer provides a stably higher signal-to-quantization noise ratio for modem signals.

ADPCM encoding and decoding circuits

An adaptive digital filter which is used, for instance, for a prediction filter in an ADPCM modulator and an ADPCM demodulator, for providing stable operation and minimum phase shift response. The filter (FIG. 4, FIG. 5) has three parallel branches (A,B,C), two (A,B) of them have a plurality of series connected non-recursive filter elements (A.sub.1 -A.sub.n, B.sub.1 -B.sub.n) each of which has degree not larger than three relating to an operator (Z.sup.-1), and third branch (C) is merely a conductive line. Tap coefficients (c.sub.1, c.sub.2, . . ., d.sub.1, d.sub.2, . . . ) of non-recursive filter elements change according to solutions of the transfer of the filter. A numerator and/or a denominator of the transfer function of the present filter is a Chebychev polynominal relating to an operator (Z.sup.-1), and has a zero point and/or a pole. The solutions (w.sub.i, v.sub.i) of a numerator and a denominator locate alternately on a unit circle (FIG. 6) on a Z.sup.-1 plane. When solutions of the transfer function do not locate alternately on said unit circle, tap coefficients (c.sub.1, c.sub.2, . . . , d.sub.1, d.sub.2, . . . ) are not updated, since non-alternate solutions do not assure stable operation and/or minimum phase shift response of the filter.

Adaptive digital filter

An adaptive digital filter which is used, for instance, for a prediction filter in an ADPCM modulator and an ADPCM demodulator, for providing stable operation and minimum phase shift response has been found. The filter (FIG. 4, FIG. 5) has three parallel branches (A,B,C), two (A,B) of them have a plurality of series connected non-recursive filter elements (A.sub.1 -A.sub.n, B.sub.1 -B.sub.n) each of which has degree not larger than three relating to an operator (Z.sup.-1), and third branch (C) is merely a conductive line. Tap coefficients (c.sub.1, c.sub.2, . . . , d.sub.1, d.sub.2, . . . ) of non-recursive filter elements change according to solutions of the transfer function of the filter. A numerator and/or a denominator of the transfer function of the present filter is a Chebychev polynominal relating to an operator (Z.sup.-1), and has a zero point and/or a pole. The solutions (w.sub.i, v.sub.i) of a numerator and a denominator locate alternately on a unit circle (FIG. 6) on a Z.sup.-1 plane. When solutions of the transfer function do not locate alternately on said unit circle, tap coefficients (c.sub.1, c.sub.2, . . . , d.sub.1, d.sub.2, . . . ) are not updated, since non-alternate solutions do not assure stable operation and/or minimum phase shift response of the filter.

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Tokyo, Japan

Shinji Kawaguchi