초록 ▼

An inductive device composed of a bead (10) of magnetic material, such as ferrite, has an aperture through which an electrical conductor (13) is adapted to pass and a reset winding (14) wound thereon and connected to a source of constant current. The constant reset current resets the bead of magneti

An inductive device composed of a bead (10) of magnetic material, such as ferrite, has an aperture through which an electrical conductor (13) is adapted to pass and a reset winding (14) wound thereon and connected to a source of constant current. The constant reset current resets the bead of magnetic material so that the maximum volt-second absorbtion capability of the bead is available for preventing destructively high current spikes from flowing through the electrical conductor. The inductive device is advantageously used in the d.c. supply of the power transistors (101 and 102) of an inverter (100) to protect the transistors from current surges due to the simultaneous conduction of the transistors.

대표청구항 ▼

An inductive device for protecting one or more transistors in a power supply composed of a bead of magnetic material, said bead being formed with an axial aperture through which an electrical conductor electrically connected to electrodes of the transistors is adapted to pass, and a reset winding wo

An inductive device for protecting one or more transistors in a power supply composed of a bead of magnetic material, said bead being formed with an axial aperture through which an electrical conductor electrically connected to electrodes of the transistors is adapted to pass, and a reset winding wound on said bead and connected to a source of constant current for resetting said inductive device so that the maximum volt-second absorbtion capability of said inductive device is available for preventing destructively high current spikes from flowing through said electrical conductor.