Device for the incremental control of a direct-current motor for the cooling fan of a motor vehicle
AssigneeRobert Bosch GmbH
InventorsRichard Vogt, Andreas Ewert, Michael Strupp
Life of this patent
Estimating the term…
Abstract
The invention relates to a device (10) for the incremental control of at least one first direct-current motor (12) for the cooling fan of a motor vehicle. Said device comprises a first (14) and a second current-limiting component (16), and a first (22), a second (24) and a third switching element (28). The inventive device is characterized in that the switching elements (22, 24, 28) connect the first (14) and the second current-limiting component (16) in such a manner that the cooling capacity of the cooling fan can be varied in at least four levels different from zero.
Claims16
A device (10) for the incremental control of at least a first direct-current motor (12) for a cooling fan of a motor vehicle with a first current-limiting component (14) and a second current-limiting component (16), and a first (22), second (24) and third switching element (28),
- wherein
- the switching elements (22, 24, 28) connect the first (14) and second current- limiting components (16) in a manner such that the cooling capacity of the cooling fan can be varied in at least four non-zero levels,
- wherein
- the first current-limiting component (14) can be connected to a supply voltage (Vcc) using the first switching element (22), and to a first contact (26) of the direct-current motor (12) using the second switching element (24),
- the second current-limiting component (16) can be connected to the supply voltage (Vcc) using the third switching element (28), and to the first contact (26) of the direct-current motor (12) using the second switching element (24),
- the first current-limiting component (14) and second current-limiting component (16) can be connected in parallel to the supply voltage (Vcc) using the first switching element (22) and the third switching element (28), and
- they can be connected to the first contact (26) of the direct-current motor (12) using the second switching element (24), and
- the first current-limiting component (14) and second current-limiting component (16) can be connected in series to the supply voltage (Vcc) and to the first contact (26) of the direct-current motor (12) using the first switching element (22) and the second switching element (24).
A device (10) for the incremental control of at least a first direct-current motor (12) for a cooling fan of a motor vehicle with a first current-limiting component (14) and a second current-limiting component (16), and a first (22), second (24) and third switching element (28),
- wherein
- the switching elements (22, 24, 28) connect the first (14) and second current- limiting components (16) in a manner such that the cooling capacity of the cooling fan can be varied in at least four non-zero levels,
- wherein
- the first current-limiting component (14) is a resistor (46), and the second current- limiting component (16) is a second direct-current motor (48),
- wherein
- a first contact (26) of the first direct-current motor (12) can be connected to a supply voltage (Vcc) using the first switching element (22) and second switching element (24) via the resistor (46),
- the first contact (26) of the first direct-current motor (12) can be connected to a second contact (32) of the first direct-current motor (12) using the second switching element (24) and the third switching element (28),
- a first contact (50) of the second direct-current motor (48) can be connected to the supply voltage (Vcc) using the first switching element (22) via the resistor (46), and a second contact (52) of the second direct-current motor (48) can be connected to the second contact (32) of the first direct-current motor (12) using the third switching element (28),
- the first direct-current motor (12) and second direct-current motor (48) can he connected in series or parallel using the second switching element (24) and third switching element (28).
Dependencies are inferred from the claim text.