Mitsubishi Electric Frequency Inverters

Reliable variable speed drives for efficient motor control

Frequency inverters are a key element in modern industrial automation. They control motor speed, torque, and acceleration — directly influencing energy consumption, process stability, and equipment lifespan.

Mitsubishi Electric frequency inverters are designed for precise control of asynchronous and permanent-magnet motors. They are used wherever stable operation, predictable behavior under load, and long-term reliability are required.

From simple pump stations to complex production lines, Mitsubishi Electric drives form a practical foundation for energy-efficient and maintainable drive systems.

Where Frequency Inverters Add Value

In many applications, motors do not need to run at constant speed.

Running them only as fast as the process requires reduces energy consumption, mechanical stress, and maintenance costs.

Frequency inverters are typically applied to:

• control flow and pressure in pumps and fans
• regulate speed of conveyors and material handling systems
• optimize torque and acceleration in production machinery
• reduce inrush current and mechanical shock during motor start
• improve process stability under changing load conditions

Proven Technology and Global Deployment

More than seven million Mitsubishi Electric frequency inverters are currently in operation worldwide.

This installed base reflects long-term reliability and consistency across a wide range of industries and environments.

All drives are designed and manufactured in compliance with international standards, including CE, UL, cUL, GOST and marine certifications.

This simplifies integration into globally supplied equipment and supports operation under demanding industrial conditions.

Performance Capabilities

• power range from 0.2 to 630 kW for variable- and constant-torque loads
• overload capacity up to 200% for short-term peak demands
• automatic restart and flying start for rotating motors
• integrated braking control and fast torque response
• online auto-tuning for stable speed under load variations
• soft PWM modulation to reduce audible noise and motor heating
• built-in PID controller for simple process regulation
• vector control algorithms for high torque at low speeds

Energy Optimization in Daily Operation

Energy efficiency is one of the primary reasons frequency inverters are deployed.

Mitsubishi Electric drives include dedicated energy-saving functions that operate automatically during normal production.

The Optimum Excitation Control (OEC) function reduces magnetic flux under light-load conditions, lowering motor losses without sacrificing torque.
In many applications, this reduces energy consumption by up to 10%.

For facilities with multiple motors running continuously, this translates into measurable cost savings and reduced thermal stress on motors and mechanical components.

Communication and System Integration

Mitsubishi Electric frequency inverters are designed for integration into modern automation systems.

Supported industrial networks include:

• Profibus-DP
• DeviceNet
• CC-Link
• CANopen
• Modbus RTU

Ethernet-based communication modules are available for integration with PLCs, SCADA systems, and higher-level monitoring platforms.

For small or standalone systems, built-in control logic allows direct connection of sensors and actuators without an external PLC, reducing system complexity and overall cost.

Protection and Operational Reliability

Mitsubishi Electric drives continuously monitor electrical and thermal conditions.

In the event of abnormal operation, protective functions react within milliseconds to prevent damage to both the drive and the motor.

Standard protection functions include:

• overcurrent and short-circuit protection
• overvoltage and undervoltage monitoring
• phase loss detection
• thermal protection of power components

Long-life components — including extended-life capacitors and reinforced cooling systems — support continuous operation in 24/7 industrial environments.

Engineering Software and Configuration

FR Configurator / FR Configurator2

Windows-based configuration and diagnostic tools for FR-700 and FR-800 series drives.

They support:

• parameter setup, copying, and backup
• real-time monitoring and data logging
• trace and waveform analysis
• automatic tuning and resonance testing
• fault diagnostics with guided troubleshooting

VFD Setup Software

Configuration and diagnostic software for FR-500 series drives. Connection is available via the SC-FR PC adapter or through an RS-485 network.

Multiple drives can be configured and monitored simultaneously from a single interface.

Typical Applications

• pumping and ventilation systems
• material handling and conveyor lines
• mixers, agitators, and compressors
• HVAC and building automation
• general-purpose industrial machinery

How Drive Projects Usually Start

Selecting a frequency inverter is not only about motor power. In practice, correct selection depends on load characteristics, duty cycle, and system architecture.

A productive starting point includes:

• motor type and rated power
• load profile (constant or variable torque)
• required speed range and dynamics
• operating environment and duty cycle
• communication and integration requirements

Providing this information early allows the drive system to deliver stable operation, energy savings, and long-term reliability.