1, the exchange of single induction motor open-loop direct start of the elevator drag system.
2, AC two-speed motor variable pole speed elevator open-loop drag system.
3, AC two-speed motor, semi-closed-loop voltage regulation speed drive system.
4, AC two-speed motor, fully closed-loop voltage regulation of the elevator drive system. (ACVV)
5, the exchange of single-speed motor, fully closed-loop voltage regulation of the elevator drive system. (VVVF)
6, AC permanent magnet synchronous motor full closed-loop pressure regulation of the elevator drive system. (VVVF)
7, DC motor full closed-loop voltage regulation speed drive system.
