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US 2002/0163260 A1Published application
Vehicle alternator having rectifier circuit using diode and FET
AssigneeDenso Corporation
InventorsShin Kusase, Tsutomu Shiga
Life of this patent
Estimating the term…
Abstract
A vehicle alternator comprises a permanent magnet rotor, a stator having armature coils, and a rectifier circuit. In the rectifier circuit, Shottky barrier diodes and FETs are connected in series so that the forward directions of the Shottky barrier diodes and parasitic diodes of the MOSFETs are opposite. The Shottky barrier diodes are connected between the MOSFETs and the armature coils.
Claims7
A vehicle alternator comprising:
- a rotor having permanent magnets;
- a stator having armature coils for generating alternating current outputs in response to rotation of the permanent magnets of the rotor;
- and
- a rectifier circuit for converting the alternating current outputs to a direct current output,
- wherein the rectifier circuit includes series connections of a first diode and an FET having a second diode as a parasitic diode, the series connections being connected to the armature coils, and
- wherein the first diode and the second diode are arranged in each of the series connections so that forward directions of the first diode and the second diode are opposite.
3 more elements
A vehicle alternator comprising:
- a rotor for generating a fixed rotating magnetic field when rotated;
- a stator having armature coils for generating alternating current outputs in response to the fixed rotating magnetic field;
- and
- an electric circuit including rectifying diodes connected in a full-wave rectifier bridge configuration for converting the alternating current outputs to a direct current output,
- wherein the electric circuit further includes FETs connected to the rectifying diodes for controlling output power generation of the armature coils when turned off, and
- wherein the FETs are arranged so that parasitic diodes thereof are biased in reverse to the rectifying diodes.
3 more elements
Dependencies are inferred from the claim text.