Hitachi WJ200N-022HFC Inverter VFD for AC Induction Motors 2.2 kW 3 HP CT and 3.0 kW 4 HP VT Sensorless Vector Control and V/F Control

Hitachi WJ200N-022HFC Inverter

The Hitachi WJ200N-022HFC is a highly efficient and compact variable frequency drive (VFD) designed to control the speed and torque of three-phase AC induction motors with precision and reliability. Part of the advanced WJ200N series, this model is engineered to meet the demands of various industrial and commercial applications, offering superior performance, energy savings, and ease of use. With a power rating of 2.2 kW (3 HP) in constant torque (CT) mode and 3.0 kW (4 HP) in variable torque (VT) mode, it is well-suited for applications such as conveyor systems, pumps, fans, and light machinery.

Key Features

Advanced Motor Control Capabilities

The WJ200N-022HFC incorporates sophisticated control algorithms to ensure optimal motor performance:

• Sensorless Vector Control (SLV): Delivers high starting torque (200% at 0.5 Hz) without requiring an encoder, making it ideal for applications with high breakaway torque.

• V/F Control: Supports multiple V/F patterns, including constant torque, variable torque (1.7 exponent), and user-defined custom curves.

• Auto-Tuning Function: Automatically identifies and configures motor parameters for enhanced operational efficiency and stability.

Energy Efficiency

• The built-in energy-saving mode dynamically adjusts output voltage based on load conditions, reducing power consumption during light-load operations.

• Optional dynamic braking resistor support allows for efficient braking energy dissipation, minimizing deceleration times and improving cycle efficiency.

User-Friendly Interface and Programming

• Equipped with an intuitive digital keypad featuring a 4-digit LED display for real-time monitoring and parameter configuration.

• Supports multiple control sources: keypad potentiometer, analog inputs (0–10 V, 4–20 mA), digital terminals, and Modbus communication.

• Pre-configured multi-speed settings (16 speeds) and jog function provide operational flexibility for complex sequences.

Comprehensive Protection and Safety Features

• Robust protection mechanisms include overcurrent, overvoltage, undervoltage, overload, ground fault, and electronic thermal overload protection.

• Safe Torque Off (STO) functionality (via configurable inputs) ensures compliance with safety standards by preventing unintended motor operation.

• DC injection braking provides quick stopping without mechanical wear.

Connectivity and Integration

• Integrated RS-485 Modbus RTU interface enables seamless communication with PLCs, HMIs, and supervisory control systems.

• Expandable with optional fieldbus modules (e.g., Profibus, DeviceNet) for integration into diverse industrial networks.

• Multiple digital and analog I/O terminals allow for flexible custom logic and control integration.

Technical Specifications

Applications

The WJ200N-022HFC is versatile and suitable for a broad range of applications, including:

• Pump and Fan Control: Energy-efficient flow regulation with smooth acceleration and deceleration curves, reducing mechanical stress and energy costs.

• Conveyor Systems: Precise speed control and high starting torque for handling varying load conditions.

• Machine Tools: Reliable operation in drilling, milling, and cutting applications requiring stable speed maintenance.

• HVAC Systems: Enhanced energy management in heating, ventilation, and air conditioning systems.

• Packaging and Material Handling: Multi-speed operation and quick response to process changes.

Programming and Customization

The inverter offers extensive programming flexibility through its keypad or via PC-based software. Key configurable parameters include:

• Acceleration and deceleration times (0.01–3600 seconds)

• PID control for closed-loop process regulation (e.g., pressure, flow)

• Jump frequencies to avoid mechanical resonance points

• Electronic thermal protection settings based on motor characteristics

• Custom V/F curves and torque boost for specialized motor types

The built-in EzSQ function allows users to create simple sequence programs directly within the inverter, reducing the need for external controllers.

Safety and Compliance

The WJ200N series is designed and certified to meet global standards:

• CE compliant (EMC and Low Voltage Directives)

• UL and cUL listed

• RoHS compliant

Safety features include:

• Configurable Safe Stop (STO) via intelligent inputs

• Emergency stop functionality

• Password protection to prevent unauthorized parameter changes

• Fault history log with timestamp and operational data

Conclusion

The Hitachi WJ200N-022HFC is a robust, flexible, and energy-efficient variable frequency drive that combines advanced motor control technology with user-friendly operation. Its compact design, comprehensive protection features, and seamless integration capabilities make it an ideal choice for a wide array of industrial and commercial applications. Whether used in water management, automation, or HVAC systems, this inverter delivers performance, reliability, and significant energy savings.