| 摘要 |
PROBLEM TO BE SOLVED: To improve power balance among three phases in a steady state.SOLUTION: A power adjustment device comprises: control units 1R, 1S, 1T controlling an electric heater using a R phase, an S phase, and a T phase; and a correction amount calculation function part 2. The correction amount calculation function part 2 is provided with: measurement parts 20R, 20S, 20T which measure power consumption of the electric heater in the R phase, the S phase, the T phase; a maximum/minimum power detection part 21 detecting maximum power and minimum power; a correction amount calculation part 22 which performs processing to calculate a correction amount &Dgr;_X with respect to a set value SP of a control loop where the maximum power is detected and processing to calculate a correction amount &Dgr;_Y with respect to the set value SP of the control loop where the minimum power is detected; and a correction amount output part 23 which performs processing to output the correction amount &Dgr;_X to a correction amount input part in a phase where the maximum power is detected and processing to output the correction amount &Dgr;_Y to a correction amount input part in a phase where the minimum power is detected. |
