Patent ID: 6984955
Filing Date: 2006-01-10
Classification: H02P

Abstract:
1. A motor control device comprising: a target setting unit that sets a target operation amount of a DC motor or a driving target driven by the DC motor; a detecting unit that detects an actual operation amount corresponding to the target operation amount, of the DC motor or the driving target; a controlling unit that controls the DC motor by calculating a manipulation amount of the DC motor required to conform the actual operation amount to the target operation amount and outputting a control signal which indicates the manipulation amount to the DC motor, estimation units that are respectively provided for a plurality of load levels in a fluctuation range of an estimated load amount of the DC motor, and that estimate a state quantity indicating an operating state of at least one of the DC motor or the driving target based on the actual operation amount detected by the detecting unit and the calculated manipulation amount, assuming that the load amount of the DC motor belongs to the corresponding load level, a switching unit that obtains actual load information indicating an actual load amount of the DC motor in a direct or indirect manner, and selectively performs switching to one of the estimation units, which is provided for the load level corresponding to the load amount indicated by the actual load information, wherein the controlling unit calculates the manipulation amount based on the target operation amount, the actual operation amount, and the state quantity estimated by the estimation unit selected by the switching unit.