| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric motor driving device that can reliably prevent a phenomenon that has a bad effect on the electric motor. <P>SOLUTION: When a steering force N detected by a torque sensor 2 is equal to or larger than a prescribed value, temperature T<SB>m</SB>then detected by a thermistor 39 is memorized by a temperature storage means 311. When a deviation T<SB>m+1</SB>-T<SB>m</SB>, which is obtained by a deviation calculating means 312 from temperature T<SB>m+1</SB>detected next by the thermistor 39 and the temperature T<SB>m</SB>memorized by the temperature storage means 311, is equal to or larger than a prescribed value, a current limit determining means 313 transmits a control signal S to a current limiting means 314, which gradually reduces every predetermined time the upper limit value Imax of a current that is made to flow into the electric motor 4, when the control signal S is inputted. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
