Two speed direct drive drawworks
AssigneeFord Global Technologies, LLC
InventorKevin R. Williams
Life of this patent
Estimating the term…
Abstract
A direct drive drawworks (100) has a permanent magnet motor (40) with a first set of windings (250) and a second set of windings (252), a shaft (41) extending from the permanent magnet motor (40) such that the permanent magnet motor directly rotates the shaft (41), a drum (43) connected to the shaft (41) away from the permanent magnet motor (40) such that the rotation of the shaft (41) causes a corresponding rotation of the drum (43), and a switch cooperative with the first set of windings and the second set of windings so as to cause the sets of windings to be selectively connected in parallel or in series.
Claims20
A direct drive drawworks comprising:
- a permanent magnet motor having a first set of windings and a second set of windings;
- a shaft extending from said permanent magnet motor such that said permanent magnet motor directly rotates said shaft;
- a drum connected to said shaft away from said permanent magnet motor such that the rotation of said shaft causes a corresponding rotation of said drum;
- and
- a switch cooperative with said first set of windings and said second set of windings so as to cause the sets of windings to be selectively connected in parallel or in series.
A two speed permanent magnet drive system comprising:
- a permanent magnet motor having a first set of windings and a second set of windings;
- a shaft extending from said permanent magnet motor such that said permanent magnet motor directly rotates said shaft, said permanent magnet motor comprising:
- a housing;
- a stator positioned in said housing;
- and
- a rotor cooperative with said stator, said rotor being either connected or interconnected to said shaft, said stator having said first set of windings and said second set of windings extending around an interior surface of said stator, said rotor being an annular member having a plurality of permanent magnets mounted in spaced relation around a periphery of said rotor;
- and
- a switch cooperative with said first set of windings and said second set of windings so as to cause the sets of windings to be selectively connected in parallel or in series.
A direct drive drawworks comprising:
- an AC power supply;
- a permanent magnet motor electrically connected said AC power supply;
- a shaft extending from said permanent magnet motor such that said permanent magnet motor directly rotates said shaft;
- a drum connected to said shaft away from said permanent magnet motor such that said the rotation of said shaft causes a corresponding rotation of said drum;
- a resistive load bank electrically interconnected between AC power supply and said permanent magnet motor;
- and
- a transfer switch for directly electrically connecting said resistive load bank to said permanent magnet motor upon a condition occurring.
Dependencies are inferred from the claim text.