Electricity: motive power systems – Synchronous motor systems – Armature winding circuits
Patent
1996-02-09
1998-03-10
Martin, David S.
Electricity: motive power systems
Synchronous motor systems
Armature winding circuits
318722, 318724, 318723, H02P 146
Patent
active
057265496
ABSTRACT:
A sensor-less control apparatus is designed for a permanent magnet synchronous motor having multiple-phase armature windings and a rotor. The sensor-less control apparatus includes a first device for calculating a rotational angle and an angular velocity of the rotor from phase currents and phase voltages of the armature windings. A second device is operative for controlling energizations of the armature windings in response to the rotational angle and the angular velocity calculated by the first device. A third device is operative for correcting the rotational angle calculated by the first device into a correction-resultant rotational angle and informing the second device of the correction-resultant rotational angle, and for feeding back information of the correction-resultant rotational angle to the first device. A fourth device contained in the third device is operative for low-pass-filtering the rotational angle calculated by the first device and changing the rotational angle into a filtering-resultant rotational angle. A fifth device contained in the third device for, in cases where a previous rotational angle outputted from the fourth device and the rotational angle calculated by the first device are not in a same period, correcting the previous rotational angle into a correction-resultant previous rotational angle and informing the fourth device of the correction-resultant previous rotational angle.
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Watanabe, et al: "A Sensorless Detecting Strategy of Rotor Position and Speed on Permanent Magnet Synchronous Motor," T. IEE Japan, vol. 110-D, No. 11, 1990, pp. 1193-1200.
Obayashi Kazuyoshi
Okuno Tomoya
Sakakibara Hiroyuki
Tsuji Hiroya
Martin David S.
Nippon Soken Inc.
Nippondenso Co. Ltd.
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