FST-500 Mini VFD Drives Compact Vector Inverter 0.4kW-7.5kW
Mini VFD Drives | FST-500 Compact Vector Inverter (0.4kW-7.5kW)
The Anyhz FST-500 is a compact mini VFD drive designed for small motor applications from 0.4kW to 7.5kW. This miniature variable frequency drive features advanced sensorless vector control that delivers stable low-speed torque output and ultra-quiet operation—making it the ideal mini frequency inverter for pumps, fans, and light industrial machinery.
Whether you need a mini VFD drive for water supply systems, HVAC ventilation, or packaging conveyors, the FST-500 provides reliable performance at an economical price. This small VFD drive is perfect for textile, food processing, and general automation applications where space and budget are limited.
- Compact Mini VFD Design: Small size and light weight, perfect for space-constrained installations
- Multiple Protection Technologies: Strong anti-interference ability for industrial environments
- Flexible V/F Control: Customizable V/F curve with automatic acceleration/deceleration adjustment
- Ultra-Quiet Operation: Carrier frequency 0-15kHz, ideal for noise-sensitive applications
- Built-in PID Function: Standard PID controller for pressure/flow control—no external controller needed
- Smart Energy Saving: Automatic torque boost, voltage regulation, sleep/wake function
- Zero Speed Hold: Maintains position without mechanical brake for conveyor applications
- Universal Communication: Built-in RS-485 with Modbus RTU protocol
| Items | Specifications |
|---|---|
| Output | Rated voltage: 220V | 380V Applicable motor power (kW): 0.4 | 0.75 | 1.5 | 2.2 | 4 | 5.5 | 0.75 | 1.5 | 2.2 | 4 | 5.5 | 7.5 Rated Current (A): 2.5 | 5.0 | 7.0 | 10 | 17 | 25 | 3.0 | 4.0 | 5.0 | 8.2 | 13 | 18 |
| Overload | Maximum overload current: 150% for 1 minute (standard for mini VFD drives) |
| Control & Operation | Input voltage: Single phase / 3-phase 220V; 3-phase 380V ±10%; 50-60Hz ±5% Output voltage: 0 to rated input voltage Control method: Sine wave SPWM, Sensorless vector control (SVC) Output frequency: 0.1-400 Hz Frequency accuracy (25±10℃): Digital: ±0.01% | Analog: ±0.2% Frequency resolution: Digital: 0.1Hz | Analog: 1‰ of max frequency V/F features: Constant torque and reduced torque curves Torque boost: Auto torque compensation, slip compensation, 150% starting torque at 5Hz Acc/Dec time: 0.1-600 seconds, 2nd acc/dec set available Frequency setting: Keyboard, potentiometer, 0-10VDC, 4-20mA Input signals: Multi-speed, jog, acc/dec switch, counter, external B.B. Output signals: Running status, frequency limit, zero speed, fault indication Analog monitor: Output frequency/current Protection: Overcurrent, overload, overvoltage, undervoltage, CPU fault, thermal relay, speed loss protection, overheating, ground fault Other functions: ACR, fault retry, analog gain, skip frequency, upper/lower limit, fault record, carrier frequency setting, auto torque boost, slip compensation, PID control |
| Environment | Installation: Indoor, altitude <1000m, dust-free, no corrosive gas, no direct sunlight Temperature: -10℃ to +40℃ (bare machine: -10℃ to +50℃) Humidity: 20%-90%RH (no condensation) Vibration: 5.9m/s² (0.6G) at 10-55Hz Storage: Same as operation conditions Mounting: Wall-mounted |
| Protection | IP20 (standard for mini VFD drives) |
| Cooling | Natural cooling (0.4kW), forced air cooling (≥0.75kW) |
Perfect for constant pressure water supply systems. This mini VFD drive features a built-in PID controller that maintains stable pressure while the sleep function reduces energy costs during low-demand periods.
Key benefits: Energy saving 20-30%, soft start reduces water hammer, automatic sleep/wake
Recommended mini VFD models: FST-500-0R4T4 (0.4kW), FST-500-0R7T4 (0.75kW), FST-500-1R5T4 (1.5kW)
Ideal for air handling units and ventilation systems. This miniature frequency inverter operates ultra-quietly (0-15kHz carrier frequency) ensuring comfortable environments in commercial buildings and hospitals.
Key benefits: Noise reduction, energy saving 15-25%, smooth airflow control
Recommended mini VFD models: FST-500-0R7T4 (0.75kW), FST-500-1R5T4 (1.5kW), FST-500-2R2T4 (2.2kW)
Compact size fits tight spaces in automated production lines. This small VFD drive provides precise speed control to improve packaging accuracy and reduce material waste.
Key benefits: Space saving, precise positioning, zero-speed hold, easy integration
Recommended mini VFD models: FST-500-0R4T4 (0.4kW), FST-500-0R7T4 (0.75kW), FST-500-1R5T4 (1.5kW)
- Textile Machinery: Spinning frames, winding machines requiring precise speed control
- Food Processing: Mixers, conveyors, packaging equipment with hygienic requirements
- Machine Tools: Small lathes, drilling machines, grinding equipment
- Agricultural Equipment: Irrigation pumps, feed conveyors, ventilation fans
- Water Treatment: Small booster pumps, dosing pumps, aeration blowers
| Feature | Anyhz FST-500 Mini VFD | Standard Mini VFD | Impact |
|---|---|---|---|
| Control Accuracy | ±0.01% (digital) | ±0.5% | ✓ 50x more precise speed control |
| Starting Torque | 150% at 5Hz | 100% at 5Hz | ✓ Better heavy-load starting |
| Built-in PID | ✓ Standard | ✗ Optional/extra cost | ✓ Save $50-100 on external controller |
| Communication | RS-485 + Modbus RTU | RS-485 only | ✓ Ready for industrial networks |
| Carrier Frequency | 0-15kHz (ultra-quiet) | 0-8kHz | ✓ Quieter operation for HVAC |
| Price | 15-20% lower than Delta/INVT | - | ✓ Best value mini VFD drive |
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