Rotary electrical machine with excitation provided with a digital regulator device
First Claim
1. A rotary electrical machine with excitation (1) provided with a digital regulator device (2), said rotary electrical machine adapted to operate as a generator and supply an output voltage (Ub+) adjusted by an excitation current (Ie), and having a pass-band limited by a first predetermined cut-off frequency (F1c), said digital regulator device (2) comprising:
- control means (7) for control of the said excitation current (Ie); and
a regulator loop (6) comprising input means (10) for measurement by sampling of said output voltage (Ub+) which generates a sampled signal at a first predetermined sampling frequency (F1e), and output means (13) for generation of a control signal (PWM) which controls said control means (7) according to said sampled signal and a set value (Uo), wherein said input means (10) for measurement comprise oversampling means such that said first sampling frequency (F1e) is more than twice said first cut-off frequency (F1c), and wherein said regulator loop (6) additionally comprises means (12) for decimation of said sampled signal.
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Accused Products
Abstract
The rotary electrical machine is capable of functioning as a generator and outputs a continuous output voltage (Ub+) that is adjustable by an excitation current. The digital regulator (2) of the machine comprises an excitation current control means (7) and a control loop (6) that includes a device (10) for measurement, by sampling, of the output voltage (Ub+), the measurement device generating a signal sampled at a predetermined first sampling frequency (F1 e). The machine has a bandwidth that is limited by a predetermined first cutoff frequency (F1 c). The measurement device includes an apparatus for oversampling such that the first sampling frequency (F1 e) is greater than twice the first cutoff frequency (F1 c), and the control loop also includes an apparatus (12) for decimating the sampled signal.
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Citations
17 Claims
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1. A rotary electrical machine with excitation (1) provided with a digital regulator device (2), said rotary electrical machine adapted to operate as a generator and supply an output voltage (Ub+) adjusted by an excitation current (Ie), and having a pass-band limited by a first predetermined cut-off frequency (F1c), said digital regulator device (2) comprising:
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control means (7) for control of the said excitation current (Ie); and a regulator loop (6) comprising input means (10) for measurement by sampling of said output voltage (Ub+) which generates a sampled signal at a first predetermined sampling frequency (F1e), and output means (13) for generation of a control signal (PWM) which controls said control means (7) according to said sampled signal and a set value (Uo), wherein said input means (10) for measurement comprise oversampling means such that said first sampling frequency (F1e) is more than twice said first cut-off frequency (F1c), and wherein said regulator loop (6) additionally comprises means (12) for decimation of said sampled signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A digital regulator device (2) for a rotary electrical machine with excitation (1), the rotary electrical machine having a pass-band limited by a first predetermined cut-off frequency (F1c) and operable as a generator for supplying an output voltage (Ub+) adjusted by an excitation current (Ie), said digital regulator device (2) comprising:
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control means (7) for control of the said excitation current (Ie); and a regulator loop (6) comprising input means (10) for measurement by sampling of said output voltage (Ub+) which generates a sampled signal at a first predetermined sampling frequency (F1e), means (12) for decimation of said sampled signal and output means (13) for generation of a control signal (PWM) which controls said control means (7) according to said sampled signal and a set value (Uo), wherein said input means (10) for measurement comprise oversampling means such that said first sampling frequency (F1e) is more than twice said first cut-off frequency (F1c).
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14. A regulator loop (6) for a rotary electrical machine adapted to operate as a generator and supply an output voltage (Ub+) adjusted by an excitation current (Ie), said regulator loop (6) comprising:
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input means (10) for measurement by sampling of said output voltage (Ub+) which generates a sampled signal at a first predetermined sampling frequency (F1e); and output means (13) for generation of a control signal (PWM) which controls control means (7) for controlling of the said excitation current (Ie) according to said sampled signal and a set value (Uo); and means (12) for decimation of said sampled signal; said input means (10) comprising oversampling means such that said first sampling frequency (F1e) is more than twice said first cut-off frequency (F1c). - View Dependent Claims (15, 16, 17)
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Specification