| 摘要 |
A switch for an inductive load includes a first leg having a first field effect transistor (Q1) connected between one terminal (L1) of the load (102) to the high potential terminal (E+) of a power supply and a second leg having a second field effect transistor (Q2) connected between the other terminal (L2) of the load (102) and the low potential terminal (E-) of the power supply. A plurality of current paths (136) located on opposite sides of the load terminals (L1, L2) connected in parallel and extend from one of the load terminals (L1, L2) to one of the power supply terminals (E-, E+). Each current path includes an inductor (122, 134) connected in series with a diode (124, 136). A choke energy path is associated with each current path and includes a diode (128, 140) connected in series with resistors (130, 142). The inductors (122, 134) in the current paths operate to inhibit reverse recovery current through the diodes (124, 136) while the choke energy paths dissipate oscillation energy in the switch upon operation of the transistors to connect the inductive load across the terminals of the power supply. |
