The AnyHz FST-585 series is a high-performance vector variable frequency drive engineered for industrial motor control from 0.4kW to 11kW. Supporting both open-loop sensorless vector control (SVC) and V/F control, this universal frequency inverter delivers 180% starting torque at 0.5Hz and a 1:100 speed range, making it ideal for pumps, fans, conveyors, compressors, mixers, and general automation machinery.
Available in single-phase 220V (2S) and three-phase 380V (4T) configurations, the FST-585 vector VFD features a built-in PID controller, 16-segment multi-speed operation, standard RS485 Modbus RTU communication, and optional built-in braking unit (B suffix). Whether you need a pump VFD for constant pressure water supply or a fan frequency drive for HVAC energy savings, the FST-585 provides reliable, cost-effective performance with comprehensive protection.
| Input Voltage | Model | Power (kW) | Input Current (A) | Output Current (A) | Motor (kW) |
|---|---|---|---|---|---|
| 1-Phase 220V ±10% | FST-585-2S0.4GB | 0.4 | 5.4 | 2.1 | 0.4 |
| FST-585-2S0.75GB | 0.75 | 8.2 | 3.8 | 0.75 | |
| FST-585-2S1.5GB | 1.5 | 14 | 7.0 | 1.5 | |
| FST-585-2S2.2GB | 2.2 | 23 | 9.0 | 2.2 | |
| 3-Phase 380V ±15% | FST-585-4T0.75GB | 0.75 | 3.4 | 2.1 | 0.75 |
| FST-585-4T1.5GB | 1.5 | 5.0 | 3.8 | 1.5 | |
| FST-585-4T2.2G/3.7PB | 2.2 / 3.7 | 5.8 | 5.1 / 9.0 | 2.2 / 3.7 | |
| FST-585-4T3.7G/5.5PB | 3.7 / 5.5 | 10.5 | 9.0 / 13 | 3.7 / 5.5 | |
| FST-585-4T5.5G/7.5PB | 5.5 / 7.5 | 14.6 | 13 / 17 | 5.5 / 7.5 | |
| FST-585-4T7.5G/11PB | 7.5 / 11 | 20.5 | 17 / 25 | 7.5 / 11 |
| Item | Specification |
|---|---|
| Control Method | Open-loop Vector Control (SVC) / V/F Control |
| Speed Range | 1:100 (SVC) |
| Starting Torque | 180% at 0.5Hz (SVC) |
| Speed Accuracy | ±0.5% (SVC) |
| Torque Accuracy | ±5% (SVC) |
| Overload Capacity | G-Type: 150% 60s / 180% 3s; P-Type: 120% 60s / 150% 3s |
| Output Frequency | SVC: 0-320Hz; V/F: 0-3200Hz |
| Carrier Frequency | 0.75kHz - 15kHz (auto-adjust by load and temperature) |
| Frequency Resolution | Digital: 0.01Hz; Analog: 0.025% of max frequency |
| V/F Curve | Linear, Multi-point, Custom V/F curve |
| Torque Boost | Auto torque boost; Manual 0.1% - 30.0% |
| Accel/Decel Time | 0.0 - 3200.0s (4 groups, linear or S-curve) |
| Analog Input | AI1: 0-10V / 4-20mA (selectable via P4-37); Impedance: 22kΩ (V) / 500Ω (A) |
| Digital Input | 4 channels (X1-X4, X4 supports HDI pulse up to 50kHz); Level: 5V-30V |
| Relay Output | KA-KC (NO): AC250V 3A / DC30V 1A |
| Analog Output | AO1: 0-10V / 0-20mA |
| Communication | RS485, Modbus RTU protocol |
| Protection | Overcurrent, overvoltage, undervoltage, overload, input/output phase loss, module overheat, motor short-circuit, external fault |
| Ambient Temperature | -10℃ ~ +40℃ (derate above 40℃ up to 50℃) |
| Humidity | <95% RH, no condensation |
| Altitude | ≤1000m (derate 10% per additional 1000m) |
| Vibration | <5.9m/s² (0.6g) |
| Cooling | Forced air cooling |
| Protection Rating | IP20 |
5-digit LED display with RUN, L/R, F/R status indicators. Features potentiometer, PRG/ENT/MFK keys, and removable design with optional external bracket.
Clear color-coded RST (input) and UVW (output) power terminals. Control side includes +10V, +24V, AI1, X1-X4, RS485 (A+/B-), and relay KA-KC.
Industrial-grade coated printed circuit board provides extra moisture and dust resistance for harsh environments.
High-performance cooling fan on 3.7kW+ models. Optimized air channel design keeps IGBT and rectifier modules within safe temperatures.
Quality IGBT power modules deliver stable PWM output with low harmonic distortion, reducing motor heating and noise.
Supports 3-phase 380V input, motor U/V/W output, DC braking resistor (PB terminal on B models), and full signal isolation.
Built-in PID and sleep/wake function make the FST-585 an excellent pump VFD for booster stations and irrigation. Save 20-30% energy while eliminating water hammer.
Recommended: FST-585-4T1.5GB, FST-585-4T2.2G/3.7PB, FST-585-4T3.7G/5.5PB
Auto-adjustable carrier frequency (0.75-15kHz) ensures quiet operation in air handling units and cooling towers. P-type models are optimized for quadratic torque loads.
Recommended: FST-585-4T0.75GB, FST-585-4T1.5GB, FST-585-4T2.2G/3.7PB
Precise SVC speed control and optional braking unit (B models) ensure smooth start/stop for conveyor belts and lifting equipment.
Recommended: FST-585-4T0.75GB, FST-585-4T1.5GB, FST-585-4T7.5G/11PB
Reliable performance for mixers, grinders, textile machines, packaging equipment, and machine tools requiring stable torque across the full speed range.
Recommended: FST-585-2S0.4GB to FST-585-4T7.5G/11PB (full range)
| Feature | AnyHz FST-585 Vector VFD | Standard V/F Inverter | Impact |
|---|---|---|---|
| Control Mode | SVC + V/F dual mode | V/F only | ✓ Better low-speed torque and precision |
| Starting Torque | 180% at 0.5Hz | ~100% at 5Hz | ✓ Heavy-load startup without stall |
| Built-in PID | Standard | Optional / Extra cost | ✓ Save $50-100 on external controller |
| Multi-Speed | 16 segments (PLC or terminal) | 4-8 segments | ✓ More flexible process control |
| Communication | RS485 + Modbus RTU | Basic or none | ✓ Ready for SCADA and remote monitoring |
| Braking Unit | Built-in on "B" models | External only | ✓ Reduced wiring and panel space |
| Transient Power Loss | Non-stop ride-through | Immediate trip | ✓ Avoid unnecessary downtime |
G-type (General Load): Designed for constant torque applications such as conveyors, mixers, and machine tools with 150% overload capacity for 60 seconds. P-type (Pump/Fan Load): Optimized for variable torque applications like water pumps and HVAC fans with 120% overload capacity for 60 seconds. P-type models typically allow one frame size to drive a larger motor (e.g., 7.5G/11PB means G-type for 7.5kW or P-type for 11kW).
Yes. The FST-585-2S series supports single-phase 220V ±10% input and is available in 0.4kW, 0.75kW, 1.5kW, and 2.2kW. These are ideal for residential water pumps, small workshops, and regions with single-phase power supply.
Absolutely. The FST-585 features a built-in PID controller and sleep/wake function. Simply connect a 0-10V or 4-20mA pressure sensor to AI1, set the target pressure via parameters, and the drive will automatically adjust pump speed to maintain constant pressure.
The "B" suffix indicates the model includes a built-in braking unit. This is essential for applications requiring fast deceleration, such as lifting equipment, centrifuges, and high-inertia loads. Without the B suffix, you would need to install an external braking unit and resistor.
For V/F control mode, no tuning is required—just set basic motor parameters. For SVC (sensorless vector) mode, we recommend performing static or dynamic auto-tuning (P1-37 parameter) to achieve the best torque response and speed accuracy. The procedure takes only a few minutes via the keypad.
Contact AnyHz today for competitive pricing, technical support, and OEM/ODM services. We offer fast delivery from stock and 18-month warranty on all FST-585 series drives.
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