VFD control system
The drilling-rig VFD control system is a multi-drive variable-frequency speed-control system. VFD systems for rigs drilling from 3,000 to 12,000 meters are developed and produced, using fully digital vector-control voltage-type AC drives.
- VFD
Last reviewed 2026-10-27 (Asia/Shanghai)
System features
The drives are fully digital vector-control voltage-type AC variable-frequency devices, with V/F characteristic curves and field-oriented vector control. The PLC uses PRONET fieldbus communication for control, monitoring, and fault diagnosis.
- High-performance speed control
- Small starting current, high operating efficiency, and strong overload capacity
- Feedback braking
- Convenient and safe use, low noise, and easy maintenance
Technical parameters
Figures below are the configuration table printed for 30DB through 120DB. A cell with two lines in the catalog is written here with a slash.
| Technical parameter | 30DB | 40DB | 50DB | 70DB | 80DB | 90DB | 120DB |
|---|---|---|---|---|---|---|---|
| Generator control cabinet | 3 sets | 3 sets | 3 sets | 4 sets | 4 sets | 5 sets | 5 sets |
| Frequency inverter | 600 kW × 1 and 800 kW × 1 | 600 kW × 1 and 800 kW × 1 | 800 kW × 2 | 800 kW × 2 and 1100 kW × 2 | 1100 kW × 2 | 1100 kW × 4 | 1100 kW × 4 |
| Dynamic braking | 1200 kW × 1 | 2400 kW × 1 | 3600 kW × 1 | 4800 kW × 1 | — | — | — |
| Comprehensive control cabinet | S7-1500 | S7-1500 | S7-1500 | S7-1500 | S7-1500 | S7-1500 | S7-1500 |
| Driller's console | ET200SP | ET200SP | ET200SP | ET200SP | ET200SP | ET200SP | ET200SP |
| Automatic drilling feed frequency cabinet | 45 kW × 1 | 55 kW × 1 | 75 kW × 1 | 90 kW × 1 | 90 kW × 2 | 110 kW × 2 | 110 kW × 2 |
| Main transformer | 800 kVA × 1 | 1000 kVA × 1 | 1250 kVA × 1 | 1600 kVA × 1 | 2000 kVA × 1 | 2100 kVA × 1 | 2500 kVA × 1 |
| MCC cabinet | 4 sets | 5 sets | 6 sets | 7 sets | 8 sets | — | — |
| Soft starter system | 45 kW, 5 circuits, 1 set | 55 kW, 7 circuits, 1 set | 75 kW, 8 circuits, 1 set | 110 kW, 12 circuits, 1 set | 110 kW, 15 circuits, 1 set | — | — |
Questions buyers ask
- What is the Hande drilling-rig VFD system?
- It is a multi-drive variable-frequency speed-control system for rigs drilling from 3,000 to 12,000 meters, using fully digital vector-control voltage-type AC drives with V/F curves and field-oriented vector control.
- How does the PLC communicate?
- The catalog says the PLC uses PRONET fieldbus communication for control, monitoring, and fault diagnosis.
- Which configurations are in the table?
- The printed table columns are 30DB, 40DB, 50DB, 70DB, 80DB, 90DB, and 120DB, covering generator-control cabinets, frequency inverters, dynamic braking, transformers, MCC, and soft starters. Mud-pump and top-drive cabinets are on mud pump control and top drive control.