| 摘要 |
<p>According to the invention, the elevator system includes an elevator driving system and a control system which either uses power or generates power in dependence upon the relationship between the hanging total mass and the balanced load. The process evaluates the relationship between the hanging total mass and the balance load getting upward movement of the elevator to: operate the N.C. motor with the motor function obtaining energy from an electrified source, if the hanging total mass is greater than the balance load; operate the numerically controlled motor with the generator function and output electric energy at a frequency of the electrified source for supplying power to the electrified source if the hanging total mass is lower than the balance load and supplying only an amount of energy from the electrified source to the numerically controlled motor for overcoming friction when the hanging total mass substantially equals the balance load; and during downward movement of the elevator, the N.C. motor uses the generator function to supply electricity to the electrified source at the frequency of the electrified source if the total mass is greater than the balance load; the N.C. motor is used with the motor function and obtains energy from the electrified source if the total mass is lower than the balance load; and the N.C. motor is supplied with only a small amount of electric energy from the electrified source to overcome friction if the total mass equals the balance load.</p> |
