Vector control VFDs — precise torque and speed regulation
Vector control variable frequency drives provide independent control of magnetic flux and torque in asynchronous motors. Unlike scalar VFDs, vector drives deliver 100% torque from zero speed — critical for cranes, elevators, extruders, winding machines, and conveyors with heavy-duty starts.
Chastotnik.ua offers the Veichi AC310 series — a universal vector drive from 0.75 to 560 kW, available for single-phase 220V and three-phase 380V supply.
How to choose a vector control VFD
Key selection criteria:
- Load type — constant torque (conveyor, crane) or variable (pump, fan)
- Starting torque — AC310 delivers up to 150% rated torque at startup
- Control mode — sensorless (SVC, ±0.5% accuracy) or with encoder (FVC, ±0.01%)
- Power supply — 1×220V or 3×380V
Top-selling Veichi AC310 models (sales over 12 months)
| Model | Power | Current, A | Supply | Application |
|---|---|---|---|---|
| AC310-T3-004G/5R5P-B | 4.0 kW | 10 | 3×380V | Conveyors, mixers, compressors |
| AC310-T3-1R5G/2R2P-B | 1.5 kW | 4 | 3×380V | Small machines, gate automation |
| AC310-T3-5R5G/7R5P-B | 5.5 kW | 13 | 3×380V | Winding machines, extruders |
| AC310-T3-7R5G/011P-B | 7.5 kW | 17 | 3×380V | Elevators, overhead cranes |
| AC310-T3-2R2G-B | 2.2 kW | 6 | 3×380V | Industrial pumps, crushers |
Vector vs scalar control — when to use which
| Parameter | Vector (AC310 SVC/FVC) | Scalar (V/f) |
|---|---|---|
| Torque at 0 Hz | 100% rated | 40-60% |
| Speed accuracy | ±0.5% (SVC), ±0.01% (FVC) | ±3-5% |
| Starting torque | 150% at 0.5 Hz | 100% at 5 Hz |
| Response time | < 20 ms | 100-200 ms |
| Typical use | Cranes, elevators, extruders | Pumps, fans |
Manufacturers and series
Veichi — the AC310 series is the main vector drive in our catalog. It supports sensorless vector control (SVC), closed-loop vector with encoder (FVC), built-in PLC (up to 10,000 steps), braking module, and RS-485 Modbus RTU port.
By power rating
AC310 vector VFDs are available in: 2.2 kW, 3 kW, 5.5 kW, 7.5 kW, 11 kW, 15 kW, 22 kW and above.
By power supply
Single-phase models (1×220V): 0.75 to 5.5 kW — for single-phase to three-phase conversion. Three-phase (3×380V): 0.75 to 560 kW — full industrial range.
Warranty and support
Official 24-month warranty. Delivery across Ukraine: Nova Poshta, Ukrposhta. Pickup from Lviv warehouse. Free engineer consultation on power selection and control mode.
