Field control device, method of field control, and synchronous rotating machine

Patent metadata

Field	Value
Publication number	US-9450522-B2
Application number	US-201314768561-A
Country	US
Kind code	B2
Filing date	Mar 18, 2013
Priority date	Mar 18, 2013
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

A field control device for a synchronous rotating machine includes: a target operating condition input unit; a first subtraction unit; a final-control-quantity control computation unit that accepts the final-control-quantity deviation and outputs a field-current correction demand value; an anticipatory computation unit that outputs a field-current anticipatory demand value based on the operating condition demand values input; an addition unit that adds the field-current correction demand value and the field-current anticipatory demand value; a second subtraction unit; and a field-current regulation device that adjusts the field current based on the field current deviation. The anticipatory computation unit includes: a dependence characteristic data storage unit that stores dependence characteristics predicted on the basis of the results of a no-load test; and a circuit calculation unit that performs a circuit calculation by using the dependence characteristics and outputs a field-current anticipatory demand value.

First claim

The invention claimed is:

1. A field control device for a synchronous rotating machine including armature and field windings, the field control device comprising:
a target operating condition input unit to accept, as inputs, target operating condition demand values including a final-control-quantity demand value which is a demand value of a final control quantity of the synchronous rotating machine;
a first subtraction unit to subtract, from the final-control-quantity demand value input by the target operating condition input unit, a final-control-quantity feedback value of the synchronous rotating machine to output a final-control-quantity deviation;
a final-control-quantity control computation unit to accept, as an input, the final-control-quantity deviation from the first subtraction unit, to output a field-current correction demand value;
an anticipatory computation unit to output a field-current anticipatory demand value based on the operating condition demand values input by the target operating condition input unit;
an addition unit to add the field-current correction demand value and the field-current anticipatory demand value to output a field-current setting value;
a second subtraction unit to subtract, from the field-current setting value, a value of field current flowing through the field winding to output a field current deviation; and
a field-current regulation device to adjust the field current based on the field current deviation,
wherein the anticipatory computation unit includes:
a dependence characteristic data storage unit to store dependence characteristics which are predicted based on the results of a no-load test of the synchronous rotating machine; and
a circuit calculation unit to perform a circuit calculation by using the dependence characteristics based on the operating condition demand values input by the target operating condition input unit to output a field-current anticipatory demand value.

2. The field control device according to claim 1 , wherein
the synchronous rotating machine is a generator, and the final control quantity is terminal voltage of the generator.

3. The field control device according to claim 1 , wherein
the synchronous rotating machine is an electric motor, and the final control quantities are an effective power output and rotation angular velocity of the electric motor which are elements for calculating axial torque of the electric motor.

4. The field control device according to claim 1 , wherein
in an equivalent circuit of the synchronous rotating machine, the dependence characteristics include:
a first characteristic function representing dependence of mutual inductance between the field and armature windings on the number of interlinkage magnetic fluxes of the armature winding;
a second characteristic function representing dependence of iron loss resistance on the number of interlinkage magnetic fluxes of the armature winding; and
a third characteristic function representing dependence of synchronous inductance on the number of interlinkage magnetic fluxes of the armature winding.

5. A field control method of a synchronous rotating machine including armature and field windings, the method comprising:
a preliminary step for carrying out control of the synchronous rotating machine; and
a field control step of receiving operating-condition demand values after the preliminary step and outputting a field-current demand value to a field current control device, wherein
the preliminary step includes:
a no-load test step of carrying out a no-load test of the synchronous rotating machine; and
a dependence characteristic deriving step of deriving dependence characteristics of the synchronous rotating machine based on results of the no-load test after the no-load test step, and

the field control step includes:
a step of accepting, as inputs, the operating-condition demand values;

a field current calculation step of calculating field current by performing a circuit calculation using the dependence characteristics based on the operating-condition demand values; and
a field current adjustment step of adjusting field current based on a field current demand value calculated by the field current calculation step.

6. A synchronous rotating machine comprising:
an armature winding;
a field winding; and
a field control device, wherein
the field control device includes:
a target operating condition input unit to accept, as inputs, target operating condition demand values including a final-control-quantity demand value of the synchronous rotating machine;
a first subtraction unit to subtract, from the final-control-quantity demand value output from the target operating condition input unit, a final-control-quantity feedback value of the synchronous rotating machine to output a final-control-quantity deviation;
a final-control-quantity control computation unit to accept, as an input, the final-control-quantity deviation from the first subtraction unit, and outputs a field-current correction demand value;
an anticipatory computation unit to output a field-current anticipatory demand value based on the operating condition demand values input by the target operating condition input unit;
an addition unit that adds the field-current correction demand value and the field-current anticipatory demand value to output a field-current setting value,
a second subtraction unit to subtract, from the field-current setting value, a value of field current flowing through the field winding to output a field current deviation; and
a field-current regulation device that adjusts field current based on the field current deviation, wherein

the anticipatory computation unit includes:
a dependence characteristic data storage unit to store dependence characteristics which are predicted based on results of a no-load test of the synchronous rotating machine; and
a circuit calculation unit to perform a circuit calculation by using the dependence characteristics based on the operating condition demand values input by the target operating condition input unit to output a field-current anticipatory demand value.

7. The synchronous rotating machine according to claim 6 , wherein
the synchronous rotating machine is a reluctance-type synchronous rotating machine including:
a rotor supported in a rotatable manner, with a plurality of convex salient pole portions formed in such a way as to be spaced out at regular intervals in a circumferential direction on an outer periphery thereof; and
a stator core disposed on an outer periphery of the rotor with a radial-direction space between the stator core and the rotor and with a plurality of convex teeth formed in such a way as to be spaced out at regular intervals in a circumferential direction on an inner periphery thereof, wherein

the field winding includes a plurality of poles being wound around a plurality of teeth, and
the armature winding is insulated from the field winding and includes a plurality of poles being wound around each of the plurality of teeth.

8. The synchronous rotating machine according to claim 6 , comprising a cylindrical rotor.

Assignees

• Toshiba Mitsubishi Electric Industrial Systems Corp

Inventors

• Tsuda Toshihiro
• Kawamura Mitsuhiro
• Fukami Tadashi
• Shima Kazuo

Classifications

• H02P9/305

  controlling voltage (H02P9/302 takes precedence) · CPC title

• H02P6/001 Primary

  Electricity · mapped topic

• G01R31/343

  in operation · CPC title

• H02K15/02

  of stator or rotor bodies · CPC title

• H02P9/26

  using discharge tubes or semiconductor devices (H02P9/34 takes precedence) · CPC title