High speed permanent magnet motors filter

The utility model provides a high speed permanent magnet motors filter which the technical essential is: keep apart the unit including high -pass filtering unit and higher harmonic, high -pass filtering unit one end keep apart unit one end and link to each other with PWM inverter circuit's output, higher harmonic respectively, the high -pass filtering unit other end links to each other with the earthing terminal, higher harmonic keep apart the element string between PWM inverter circuit's output and high speed permanent magnet motors's input. The high -pass filtering unit include first electric capacity C1, second electric capacity C2, first inductance L1, higher harmonic keep apart the unit and include second inductance L2, third electric capacity C3. The utility model discloses can restrain the higher harmonic among the PWM inverter circuit output current to can prevent that the high speed permanent magnet motors body from pouring into the production that the electric wire netting arouses overvoltage, overc