초록 ▼

Disclosed is an electric motor system with reduced torque ripple comprising a sinusoidally magnetized permanent magnet, a sinusoidal inverter, a higher resolution position sensor, a composite iron stator yoke, a composite reinforced plastic rotor core and shaft; and a high gear ratio gear reduction

Disclosed is an electric motor system with reduced torque ripple comprising a sinusoidally magnetized permanent magnet, a sinusoidal inverter, a higher resolution position sensor, a composite iron stator yoke, a composite reinforced plastic rotor core and shaft; and a high gear ratio gear reduction box. The novel combination of magnet, inverter, sensor, plastic rotor core and shaft and high gear ratio gear box substantially reduces the torque ripple on the shaft of said motor system.

대표청구항 ▼

1. An electric motor system with reduced torque ripple comprising:an electric motor having a stator and a rotor and at least one windings; said electric motor comprising: permanent magnetic means effective in generating an essentially sinusoidal magnetic field; and a higher-resolution position senso

1. An electric motor system with reduced torque ripple comprising:an electric motor having a stator and a rotor and at least one windings; said electric motor comprising: permanent magnetic means effective in generating an essentially sinusoidal magnetic field; and a higher-resolution position sensor effective in sensing the angular position of said rotor; and a sinusoidal inverter coupled to said electric motor to drive at least one winding current through said at least one windings of said electric motor wherein said sinusoidal inverter is adapted to receive angular position information from said higher-resolution position sensor to control said at least one winding currents to be essentially sinusoidal.