| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact motor drive device having a satisfactory conversion efficiency.SOLUTION: The motor drive device includes: coils 6A-6C for acquiring AC power transmitted by radio, using a resonance phenomenon using a magnetic field; and conversion circuits 9A-9C for switching between a first mode, in which an AC current based on the AC power is made to flow through the coils and capacitors 11A-11C provided in parallel with the coils, and a second mode, in which an AC current is made to flow through the coils without passing through the capacitors, to generate the drive signal of a motor (in-wheel motor 10) on the basis of the inter-terminal voltage of the capacitors.SELECTED DRAWING: Figure 1 |
