Control unit and steering device
AssigneeHitachi Astemo, Ltd.
InventorHiroaki Kurihara
Life of this patent
Estimating the term…
Abstract
A control unit includes plural control devices configured to control drive of an electric motor. The plural control devices have general functions used for operating the electric motor both during a normal state and during a fault state, the normal state being where the plural control devices is working properly, the fault state being where any one of the plural control devices is having a fault. The plural control devices have normal-time functions distributed among the plural control devices, the normal-time functions being for use during the normal state but unnecessary during the fault state.
Claims13
A control unit comprising:
- a plurality of control devices configured to control drive of an electric motor, wherein
- the plurality of control devices has general functions used for operating the electric motor both during a normal state and during a fault state, the normal state being where the plurality of control devices is working properly, the fault state being where any one of the plurality of control devices is having a fault,
- the plurality of control devices has normal-time functions distributed among the plurality of control devices, and
- the normal-time functions are used during the normal state but unnecessary during the fault state, the normal-time functions being different from the general functions.
A control unit comprising:
- a plurality of control devices configured to control drive of an electric motor, wherein
- the plurality of control devices includes a first control device and a second control device,
- the first control device and the second control device have fault-time functions used for operating the electric motor during a fault state where any one of the plurality of control devices is having a fault,
- the first control device has a first function used during a normal state but unnecessary during the fault state, and
- the second control device has a second function used during the normal state but unnecessary during the fault state, the second function being different from the first function.
A steering system comprising:
- a vehicle control device configured to control operations of a vehicle;
- and
- a steering device configured to receive signals from the vehicle control device and change a traveling direction of the vehicle, wherein
- the steering device has a plurality of control devices configured to control drive of an electric motor of the steering device, the plurality of control devices including a first control device and a second control device,
- the first control device and the second control device have fault-time functions used for operating the electric motor during the fault state where any one of the plurality of control devices is having a fault,
- the first control device has a first function used during a normal state but unnecessary during the fault state, and
- the second control device has a second function used during a normal state but unnecessary during the fault state, the second function being different from the first function.
Dependencies are inferred from the claim text.