| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor drive controller which can detect accurately a motor current and a battery current by maintaining a phase equilibrium state. <P>SOLUTION: The terminal voltages of shunt resistors 11, 12, 13 disposed in series at the power supply side of FETs 3u, 3v, 3w of a positive side of three sets of switching element pairs for constituting an inverter main circuit 3 are given to a level shift amplifier circuit. Their output signals Su, Sv, Sw are A/D converted during a period in which the FETs 3u, 3v, 3w are turned on, and thereby the three-phase winding currents of a motor 4 are detected. Moreover, the output signal of the level shift amplifier circuit is given to a smoothing synthesizer circuit, and its output signal Sb is A/D converted, thereby detecting the positive side DC current of the battery 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
