| 摘要 |
PROBLEM TO BE SOLVED: To provide a controller of a secondary battery in which the temperature of the secondary battery can be raised easily. SOLUTION: A sensor error summing section 430 receives motor currents Iv and Iw from a current sensor, and receives the temperature Tbat of a battery B from a temperature sensor. When the battery temperature Tbat is lower than a threshold Tc, sensor error summing section 430 generates motor currents Iv1 and Iw1 by adding offset currentsΔIv andΔIw to the motor currents Iv and Iw of sensor value. When the motor currents Iv1 and Iw1 are converted into dq-axis current values Id1 and Iq1, feedback current control is carried out such that the dq-axis current values Id1 and Iq1 match current commands Id* and Iq*. Consequently, output torque from an AC motor M1 is varied periodically around a target torque with a variation width of±ΔT thus generating a power variationΔP according to the torque variationΔT. Temperature of the battery B rises when charge/discharge of power variationΔP is repeated. COPYRIGHT: (C)2007,JPO&INPIT
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