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US 12,546,629 B2Granted
Angle detection apparatus
AssigneeMitsubishi Electric Corporation
InventorsTatsuya Mori, Hiroko Ikeda, Toshihiro Matsunaga, Kenji Ikeda, Kenta Kubo
Life of this patent
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Abstract
To provide an angle detection apparatus which can reduce the error of the angle which is caused by the eccentricity, by performing the reduction processing about smallest possible number of frequency bands and the lowest possible order of frequency band. An angle detection apparatus performs a first-order component reduction processing which reduces a first-order component which is a component of one rotation period in a mechanical angle of the rotor, to each of the first system two output signals; and calculates a first angle of the rotor, based on the first system two output signals to which the first-order component reduction processing was performed.
Claims13
An angle detection apparatus comprising:
- a resolver that is provided with a stator which is provided with a first system excitation winding and first system two output windings, and a rotor which is provided with a salient pole;
- a first system exciter that applies AC voltage of a first period to the first system excitation winding;
- a first system output signal detector that detects periodically first system two output signals which are output signals of the first system two output windings at a preliminarily set detection timing;
- a first system first-order component reduction processor that performs a first-order component reduction processing which reduces a first-order component which is a component of one rotation period in a mechanical angle of the rotor, to each of the first system two output signals;
- and
- a first system angle calculator that calculates a first angle of the rotor, based on the first system two output signals to which the first-order component reduction processing was performed,
- wherein in the first-order component reduction processing, the first system first-order component reduction processor calculates first system two first-order component extraction values by performing a first-order component extraction processing which extracts the first-order component, to each of the first system two output signals, and
- wherein, in the first-order component reduction processing, the first system first-order component reduction processor calculates first system two output signals after the first-order component reduction processing by subtracting the first system two first-order component extraction values from the first system two output signals, respectively.
5 more elements
An angle detection apparatus comprising:
- a resolver that is provided with a stator which is provided with a first system excitation winding and first system two output windings, and a rotor which is provided with a salient pole;
- a first system exciter that applies AC voltage of a first period to the first system excitation winding;
- a first system output signal detector that detects periodically first system two output signals which are output signals of the first system two output windings at a preliminarily set detection timing;
- a first system first-order component reduction processor that performs a first-order component reduction processing which reduces a first-order component which is a component of one rotation period in a mechanical angle of the rotor, to each of the first system two output signals;
- and
- a first system angle calculator that calculates a first angle of the rotor, based on the first system two output signals to which the first-order component reduction processing was performed,
- wherein in the first-order component reduction processing, the first system first-order component reduction processor calculates first system two first-order component extraction values by performing a first-order component extraction processing which extracts the first-order component, to each of the first system two output signals,
- wherein in the first-order component reduction processing, the first system first-order component reduction processor stores a plurality of the first system two first-order component extraction values calculated at each phase of the one rotation period, by correlating with the corresponding phase, and
- the first system first-order component reduction processor reads the first system two first-order component extraction values corresponding to the present phase of the one rotation period, by referring to the plurality of first system two first-order component extraction values stored by correlating with the phase;
- and calculates first system two output signals after the first-order component reduction processing by subtracting the read first system two first-order component extraction values from the present first system two output signals, respectively.
7 more elements
An angle detection apparatus comprising:
- a resolver that is provided with a stator which is provided with a first system excitation winding and first system two output windings, and a rotor which is provided with a salient pole;
- a first system exciter that applies AC voltage of a first period to the first system excitation winding;
- a first system output signal detector that detects periodically first system two output signals which are output signals of the first system two output windings at a preliminarily set detection timing;
- a first system first-order component reduction processor that performs a first-order component reduction processing which reduces a first-order component which is a component of one rotation period in a mechanical angle of the rotor, to each of the first system two output signals;
- and
- a first system angle calculator that calculates a first angle of the rotor, based on the first system two output signals to which the first-order component reduction processing was performed,
- wherein in the first-order component reduction processing, the first system first-order component reduction processor calculates first system two first-order component extraction values by performing a first-order component extraction processing which extracts the first-order component, to each of the first system two output signals,
- wherein the rotor has the N salient poles (N is a natural number greater than or equal to three), and
- wherein in the first-order component reduction processing, the first system first-order component reduction processor calculates the first system two first-order component extraction values by performing a statistical processing to the first system two output signals in a statistical processing period obtained by dividing a time of the one rotation period by N, at each of a plurality of phases of the one rotation period;
- and stores a plurality of the first system two first-order component extraction values calculated at each phase, by correlating with the corresponding phase, and
- the first system first-order component reduction processor reads the first system two first-order component extraction values corresponding to the present phase, by referring to the plurality of first system two first-order component extraction values stored by correlating with the phase;
- and calculates first system two output signals after the first-order component reduction processing by subtracting the read first system two first-order component extraction values from the present first system two output signals, respectively.
9 more elements
An angle detection apparatus comprising:
- a resolver that is provided with a stator which is provided with a first system excitation winding and first system two output windings, and a rotor which is provided with a salient pole;
- a first system exciter that applies AC voltage of a first period to the first system excitation winding;
- a first system output signal detector that detects periodically first system two output signals which are output signals of the first system two output windings at a preliminarily set detection timing;
- a first system first-order component reduction processor that performs a first-order component reduction processing which reduces a first-order component which is a component of one rotation period in a mechanical angle of the rotor, to each of the first system two output signals;
- and
- a first system angle calculator that calculates a first angle of the rotor, based on the first system two output signals to which the first-order component reduction processing was performed,
- wherein in the first-order component reduction processing, the first system first-order component reduction processor calculates first system two first-order component extraction values by performing a first-order component extraction processing which extracts the first-order component, to each of the first system two output signals,
- wherein the rotor has the N salient poles (N is a natural number greater than or equal to three), and
- wherein in the first-order component reduction processing, in each of N division periods obtained by dividing the one rotation period into N, the first system first-order component reduction processor calculates the first system two first-order component extraction values by performing a statistical processing to the first system two output signals in the division period;
- and stores the N first system two first-order component extraction values calculated at each of the division periods, by correlating with the corresponding division period as the phase, and
- the first system first-order component reduction processing unit processor reads the first system two first-order component extraction values corresponding to the present division period, by referring to the N first system two first-order component extraction values stored by correlating with the division period;
- and calculates first system two output signals after the first-order component reduction processing by subtracting the read first system two first-order component extraction values from the present first system two output signals, respectively.
9 more elements
Dependencies are inferred from the claim text.