Patent ID: 6870347

Claim:
A permanent magnet synchronous motor driving system, comprising: 1) a permanent magnet synchronous motor including three phase terminals, a resonant frequency being generated between an inductance and a ground electrostatic capacitance between the following: a) one of the three phase terminals of the permanent magnet synchronous motor, and b) a ground; and 2) an inverter for driving the permanent magnet synchronous motor, the inverter generating a carrier frequency, wherein the inductance and the ground electrostatic capacitance are predetermined constants, the inductance and the ground electrostatic capacitance being predetermined by a calculation based on a specification of the permanent magnet synchronous motor designed in such a manner that the resonant frequency of the permanent magnet synchronous motor is free from a conformance with the carrier frequency of the inverter and is free from a proximity of the carrier frequency of the inverter.