| 摘要 |
PROBLEM TO BE SOLVED: To provide three-phase electromagnetic equipment which simplifies a magnetic circuit structure and a winding structure of a coil, reduces the number of coils and is easily assembled and in which a space factor of coils is enlarged and a loss is reduced.SOLUTION: A main coil and a control coil are wound around each of linear magnetic cores of a six-leg magnetic core, two main coils are paired to prepare three pairs of main coils (1aa and 1ab, 1ba and 1bb, and 1ca and 1cb), and the mail coils of each pair are connected in series or in parallel correspondingly to each phase of a three-phase AC power source. The control coils (2a, 2d, 2c, 2f, 2e and 2b) are connected in series or in parallel so as to cancel an induction voltage caused by a main magnetic flux generated by three pairs of mail coils, and a control circuit 4 is connected at an open terminal side of the control coils. A DC control magnetic flux is generated by supplying a DC control current from the control circuit 4 to the control coils, and magnetic resistance of a common magnetic path for the main magnetic flux and the DC control magnetic flux is controlled, thereby continuously varying reactance of the main coils. |
