Drive system with at least one drive unit, particularly for high speed applications and method for operating a drive system
AssigneeRENK Aktiengesellschaft
InventorPeter Boiger
Life of this patent
Estimating the term…
Abstract
A drive system has at least one drive unit each drive unit including a central shaft and a central gear connected to the central shaft such that the central gear rotates at a speed of the central shaft. Two to four decentralized gears are distributed around the circumference of the central gear and mesh with the central gear such that the rotational speed of the central gear is at least 0.5 times the rotational speed of the decentralized gears. A plurality of electric machines are operable at a speed of at least 4,000 rpm, and each decentralized gear wheel is coupled directly and without transmission ratio to a single electric machine or to two electric machines, respectively.
Claims14
A drive system, comprising:
- at least one drive unit, each drive unit comprising:
- a central shaft,
- a central gear connected to the central shaft such that the central gear rotates at a speed of the central shaft,
- two or three or four decentralized gears distributed around a circumference of the central gear and meshing with the central gear, the decentralized gears having diameters greater than the diameter of the central gear such that the speed of the central gear is greater than the speed of the decentralized gears, and
- a plurality of electric machines operable at a speed of at least 4,000 rpm, wherein each decentralized gear is coupled directly and without transmission to a single electric machine or to two electric machines;
- wherein the electric machines of the respective drive unit are drive motors which drive the decentralized gears;
- whereby the drive system is adapted for providing a power output of at least one megawatt.
A method for operating a drive system that includes at least one drive unit, each drive unit comprising:
- a central shaft,
- a central gear connected to the central shaft such that the central gear rotates at a speed of the central shaft,
- two or three or four decentralized gears distributed around a circumference of the central gear and meshing with the central gear, the decentralized gears having diameters greater than the diameter of the central gear such that the speed of the central gear is greater than the speed of the decentralized gears, and
- a plurality of electric machines operable at a speed of at least 4,000 rpm, wherein the electric machines each include a frequency converter and each decentralized gear wheel is coupled directly and without transmission to a single electric machine or to two electric machines;
- wherein the electric machines of the respective drive unit are drive motors which drive the decentralized gears;
- whereby the drive system is adapted for providing a power output of at least one megawatt;
- the method comprising:
- varying an output speed of the electric machines of the respective drive unit by adjusting the frequency of the respective frequency converters.
Dependencies are inferred from the claim text.