Device for producing electricity having voltage-booster chopper circuit with an IGBT transistor
AssigneeMoteurs Leroy-Somer
InventorsRégis Giraud, Christian Andrieux, Eric Coupart
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Abstract
The invention provides a device for producing electricity intended in particular to be stowed on board a vehicle or a container, including a three-phase alternator able to be driven in rotation at a variable speed by a thermal engine, a rectifier for generating a rectified current form the current delivered by the alternator and a voltage-booster chopper using the self-inductance of the alternator to step up the voltage. The alternator includes six or eight poles and operates with a switching frequency of preferably between 3 and 15 kHz.
Claims20
A device for producing electricity on-board a vehicle or a container, comprising:
- a three-phase alternator having a self-inductance and six or eight poles and configured to be driven in rotation by a thermal engine;
- wherein 0.15≦LωIn/V0<0.4, where L is the self-inductance per phase of the alternator, ω the angular frequency of a rotor of the alternator, In the nominal current at a given speed of rotation of the rotor and V0 the no-load output voltage of the alternator at said speed;
- a rectifier having an input connected to said alternator and an output for generating a rectified current;
- and
- a voltage-booster chopper comprising a switching element connected to the output of the rectifier for generating a stepped-up voltage at the output of the rectifier, said stepped-up voltage being induced by the self-inductance of the alternator.
An on-board electric generator comprising:
- a three-phase alternator with eight poles and having permanent-magnets, said alternator being configured to be driven in rotation at a variable speed of rotation by a thermal engine, wherein 0.15≦LωIn/V0≦0.4, where L is the self-inductance per phase of the alternator, ω the angular frequency of a rotor of the alternator, In the nominal current at a given speed of rotation of the rotor and V0 the no-load output voltage of the alternator at said speed,
- a rectifier having an input connected to said alternator and an output for generating a rectified current, and
- a voltage-booster chopper comprising a switching element connected to the output of the rectifier and operating at a switching frequency between 3 and 10 kHz.
Dependencies are inferred from the claim text.