| 摘要 |
<p>The present invention stops the occurrence of unnecessary energy consumption in the revival of surge voltages generated by a driving coil. IGBT (8) applies high voltages of a condenser (2) capable of supplying the driving-high voltages of the driving coil (2) in an electromagnetic valve to the driving coil (2). IGBT (26) applies maintenance voltages of the driving coil (2) from a DC/DC converter (30) to the driving coil (2). IGBT (10) applies the maintenance voltages or the high voltages to the driving coil (2). The surge voltages are generated in the driving coil (2) by the on or off of the IGBT (10), and IGBT (14) accumulates the surge voltages in a condenser (4). [Reference numerals] (9) Control circuit; (AA) To 20; (BB) To 14; (CC) To 26; (DD) To 8; (EE) To 10</p> |
