| 摘要 |
PURPOSE:To efficiently control a plurality of motors of different starting torques by connecting two or more motors to individual invert and simultaneously driving the inverters with similar sinusoidal voltages of different amplitudes. CONSTITUTION:The output volage waveform from a modulation voltage generating mechanism 12 is controlled by a variable resistor 13 in amplitude to obtain large torque of a motor 17, the voltage waveform is supplied to modulators 6, 7, 8, controlled by a variable resistor 14 in the amplitude to obtain small torque of a motor 19, and the voltage waveform is supplied to modulators 9, 10, 11. Accordingly, the DC voltage form a rectifier mechanism 20 is controlled by inverters 15, 18 which are operated by the similar sinusoidal voltage signal of equal frequency and different amplitude supplied from modulators 6, 7, 8, 9, 10, 11 through a driver 16, thereby simultaneously controlling the rotating speeds of the motors 17, 19 by rotating the motor 17 with large torque and the motor 19 with small torque. |
