AC-excited generator/motor apparatus
First Claim
1. An AC-excited generator/motor apparatus comprising:
- an AC-excited generator/motor having an armature mounting thereon an armature winding connected to an AC power system and a rotor mounting thereon an exciting winding excited by an AC current;
exciting means for supplying a controlled AC exciting current to the exciting winding;
means for calculating a real slip frequency corresponding to a difference between a phase of an armature voltage appearing on the armature winding and a rotational phase of the rotor; and
means for controlling the exciting current supplied to the exciting winding from the exciting means in response to a deviation of the real slip frequency from a predetermined allowable range of slip frequencies so as to restore the real slip frequency within the allowable range.
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Accused Products
Abstract
An AC-excited generator/motor apparatus comprising; an AC-excited generator/motor having an armature mounting thereon; an armature winding connected to an AC power system and a rotor mounting thereon; and an exciting winding excited by an AC current. An exciting device for supplying a controlled AC exciting current to the exciting winding comprises; a device for calculating a real slip frequency based on a difference between the phase of an armature voltage appearing on the armature winding and the rotational phase of the rotor; and a device for controlling the exciting current supplied to the exciting winding from the exciting means in response to a deviation of the real slip frequency from a predetermined allowable range of slip frequencies so as to restore the real slip frequency within the allowable range of slip frequencies.
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Citations
19 Claims
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1. An AC-excited generator/motor apparatus comprising:
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an AC-excited generator/motor having an armature mounting thereon an armature winding connected to an AC power system and a rotor mounting thereon an exciting winding excited by an AC current; exciting means for supplying a controlled AC exciting current to the exciting winding; means for calculating a real slip frequency corresponding to a difference between a phase of an armature voltage appearing on the armature winding and a rotational phase of the rotor; and means for controlling the exciting current supplied to the exciting winding from the exciting means in response to a deviation of the real slip frequency from a predetermined allowable range of slip frequencies so as to restore the real slip frequency within the allowable range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An AC-excited generator/motor apparatus comprising:
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an AC-excited generator/motor having an armature mounting thereon an armature winding connected to an AC power system and a rotor mounting thereon an exciting winding excited by an AC current; exciting means for supplying a controlled AC exciting current to the exciting winding; means for calculating a real slip frequency corresponding to a difference between a phase of an armature voltage appearing on the armature winding and a rotational phase of the rotor; and means for reducing the real slip frequency including means for controlling the exciting current supplied to the exciting winding from the exciting means in response to a deviation of the real slip frequency exceeding predetermined value of the slip frequency.
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13. An AC-excited generator/motor apparatus comprising:
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an AC-excited generator/motor having an armature mounting thereon an armature winding connected to an AC power system and a rotor mounting thereon an exciting winding excited by an AC current; exciting means for supplying a controlled AC exciting current to the exciting winding; means for calculating a real slip frequency based on a difference between a phase of an armature voltage appearing on the armature winding and a rotational phase of the rotor; and means for controlling the exciting current supplied to the exciting winding from the exciting means in response to a deviation of the real slip frequency exceeding a predetermined value of the slip frequency.
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14. An excitation control system for use with an AC-excited generator/motor apparatus having an armature mounting thereon an armature winding connected to an AC power system and a rotor mounting thereon an exciting winding excited by an AC current, said control system comprising:
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exciting means for supplying a controlled AC exciting current to the exciting winding; means for generating an active power control signal based on an active power command and an active power component transmitted between the AC power system and the armature winding; means for generating a voltage control signal based on an armature voltage appearing on the armature winding and a given voltage command; means for generating an exciting current control signal applied to the exciting means to control the exciting current based on the active power control signal and the voltage control signal; means for calculating a real slip frequency corresponding to a difference between a phase of the armature voltage and a rotational phase of the rotor of the AC-excited generator motor; means responsive to a deviation of the real slip frequency from a predetermined allowable range of slip frequencies for controlling the active power control signal so as to restore the real slip frequency within the allowable range of slip frequencies. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification