| 摘要 |
<p>A physical construction of an inverter of the type having a positive voltage line (40) and a negative voltage line (42) interconnected by one or more switch sections. Each section includes two switch circuits, each having a transistor (Q1, Q2..) in parallel with a diode (31, 32..). The two switch circuits are connected in series, with the connection (26, 28..) between the circuits providing an output to drive a load. The positive voltage line (40) includes a positive voltage rail (48) positioned closely to a negative voltage rail (50) which is part of the negative voltage line (42). The close proximity of the two rails (48, 50) causes an electrical coupling between the positive and negative voltage lines (40, 42). Current paths including circuit traces and bond wires within the inverter are arranged to place paths having oppositely directed currents, or equal and opposite di/dt's, in close parallel proximity resulting in mutual coupling and reduction in parasitic inductances (LL1, LL2..). This construction results in a substantial reduction in the inductances (LL1, LL2..) of the various lines, with a corresponding reduction in switching voltage peaks, and an increased power and operational frequency capability.</p> |
