The C40 series sensorless variable-frequency drive uses sensorless FOC vector control technology, eliminating the need for motor encoders or Hall sensors.
Achieves stable motor control using only three-phase power lines. Features excellent low-speed performance and long-distance drive capability.
Features include automatic parameter identification and rapid braking. Suitable for Hall-less DC brushless motors and encoder-less permanent magnet synchronous motors.

Product Line: C40 Series
Product Type: Sensorless Inverter Drive
Main Models: C40-400L-R / C40-200S2-BR-001 / C40-400S2-BR-001 / C40-750S2-BR-001
Input Voltage: DC24～48V / AC220V
Compatible motor power: 200W / 400W / 750W
Rated output current: 1.2A to 4.3A (for AC220V models); maximum 15 to 30A for low-voltage models.
Default speed range: 0～3000 rpm
Maximum Motor Speed: Up to 30000rpm (customization required)
Control method: Sensorless FOC vector control
Low-speed mode: Minimum approximately 20 rpm
Speed fluctuation: approximately 1% under rated conditions
Load Start: Supports up to approximately 150% of rated load torque.
Motor connection distance: up to approximately 100m
Digital Input: 4–5 channels
Digital Output: 2 channels
Analog input: 0～10V
Multi-speed: Supported
Communication Interface: RS85 / Modbus RTU
Maximum communication rate: 115.2Kbps
External keyboard: Supported
Braking function: supports external braking resistors
Installation Method: Built-in
Protection Rating: IP20
Operating temperature: -25°C to +40°C
Protection features: overcurrent, overload, short circuit, overtemperature, undervoltage, overvoltage, and more.

Brushless motor control, permanent magnet synchronous motor (PMSM) control, automated production equipment, conveying systems, packaging machinery, logistics sorting equipment, and other industrial devices requiring sensorless speed regulation, long-distance drive, and communication control.