AC Variable Frequency Inverter for Motor Control

1. High starting torque and low-speed performance
The inverter delivers 150% rated torque at 0.5Hz for G-type applications, ensuring that even high-inertia loads like crushers and mixers can start reliably. The automatic torque boost adjusts the voltage-frequency ratio in real time, compensating for stator resistance drop at low speeds.

2. Built-in PID controller for process automation
The integrated PID function supports pressure, flow, temperature, and level control without requiring an external controller. This simplifies panel design and reduces hardware costs. The PID parameters can be tuned automatically or manually for optimal response.

3. Flexible frequency sources and command channels
Up to ten frequency sources are available, including panel potentiometer, analog voltage/current, RS485 communication, multi-speed steps, and PID output. The three command channels (panel, terminal, serial) can be switched on the fly, giving operators full control over the drive’s behavior.

4. Energy-saving V/F curves
Three preset V/F curves—linear, multi-point, and square-law—allow the inverter to match the load characteristics of constant torque, centrifugal, or fan/pump applications. The square-law curve alone can reduce energy consumption by up to 30% in variable-torque loads.

5. Comprehensive protection and fault resilience
The drive includes motor short-circuit detection, output phase-loss protection, over-voltage/under-voltage protection, over-heat protection, and overload protection. The fast current-limiting function minimizes overcurrent trips, keeping your production line running.

1. Conveyor and material handling systems
The S-curve acceleration/deceleration reduces belt tension shock and extends the life of mechanical components. The multi-speed function allows different speeds for loading, transport, and positioning.

2. Pump and fan stations
The square-law V/F curve and built-in PID enable precise pressure or flow control in water supply, HVAC, and irrigation systems. The auto-energy-saving mode adjusts output to match actual demand, reducing power consumption.

3. Mixers and agitators
High starting torque and slip compensation ensure consistent mixing regardless of viscosity changes. The torque limit function protects the motor from mechanical jams.

4. Extruders and wire-drawing machines
The high frequency resolution (0.01Hz) and fast current response ensure stable line speed and product quality. The RS485 interface allows centralized speed setting and monitoring from a control room.

5. Automated production equipment
With 16-speed control via built-in PLC and digital inputs, the inverter can synchronize with pick-and-place machines, packaging lines, and assembly robots. The pulse input terminal can accept encoder feedback for precise positioning.

1. Mechanical installation
Mount the inverter vertically on a non-flammable, vibration-free surface. Ensure sufficient clearance (at least 100mm top and bottom) for air circulation. The ambient temperature should not exceed 40°C for continuous full-load operation; above that, derate the output current by 2.5% per °C up to 50°C.

2. Power and motor wiring
Use appropriately sized cables for the input and output terminals. Connect the three-phase input supply to R, S, T terminals and the motor to U, V, W. Ground the PE terminal securely. For motor cable lengths exceeding 50 meters, we recommend installing an output reactor to reduce voltage reflection and protect motor insulation.

3. Control terminal wiring
The six digital inputs and two analog inputs are optically isolated and accept dry contact or NPN/PNP signals. Use shielded twisted-pair cables for analog signals and keep them away from power cables to avoid interference. The RS485 terminals (A+, B-) should be daisy-chained with a 120Ω termination resistor at both ends of the network.

4. Key commissioning steps
After power-on, first set the motor nameplate parameters (rated voltage, current, frequency, speed) in the drive. Then perform a self-tuning (static or rotating) to optimize the motor model. Next, select the appropriate V/F curve and set acceleration/deceleration times based on the load inertia. Finally, test the drive in local and remote modes to verify all command sources and feedback signals.

5. Common troubleshooting tips
If the drive trips on over-current during acceleration, increase the acceleration time or enable the auto-stall protection. If motor vibration occurs, adjust the carrier frequency or enable the slip compensation. The built-in fault log stores the last five fault records with time stamps, aiding quick diagnosis.

1. OEM parameter presets
For bulk orders, we can pre-program the inverter with your preferred parameter sets—such as V/F curve, PID settings, communication baud rate, and default frequency source. This eliminates on-site configuration time and reduces the risk of human error during commissioning.

2. Custom labeling and branding
We can print your company logo and model number on the front panel and nameplate, making the inverter seamlessly fit your product lineup. This service is available for orders of 50 units or more.

3. Special voltage and frequency variants
While standard models cover 380V and 220V at 50/60Hz, we can modify the power board to support 460V, 480V, or 690V input for specific regions or special motors. Please consult our sales engineers for availability and lead times.

4. Selection guide by load type and power
To simplify your choice, we categorize the inverter into G-type (heavy-duty, constant torque) and P-type (light-duty, variable torque). For G-type, select the inverter whose rated current is at least 1.1 times the motor full-load current. For P-type, the inverter can be one frame size smaller due to the lower overload requirement. Our online selection tool or technical team can recommend the optimal model based on your motor nameplate data and application duty cycle.

5. Sample testing and validation
Before placing a large order, we encourage customers to request a sample unit for side-by-side testing with their existing motor and control system. We provide free technical support during the evaluation phase and can adjust parameter defaults based on your test feedback.

1. Factory testing and traceability
Every inverter undergoes a 72-hour full-load burn-in test at 40°C ambient temperature, followed by a comprehensive functional check. Serial numbers are logged for full traceability of components and test results.

2. Global compliance and safety
Our drives are designed to meet CE and UL standards, with components sourced from certified suppliers. The built-in EMC filter reduces conducted emissions, simplifying system-level compliance.

3. Warranty and technical support
We offer a 24-month standard warranty covering manufacturing defects. Our technical support team provides remote troubleshooting via phone, email, or video call, and we maintain a spare parts inventory for rapid replacement.

4. Customization and OEM services
For large-volume orders, we can customize parameters, labeling, and even firmware features to suit your specific motor control requirements. Our engineering team works closely with your R&D staff to ensure seamless integration.