Altivar

Altivar is the Schneider Electric range of variable frequency drives for controlling and regulating electric motors within Industrial Automation, process industry, infrastructure and building-related installations.

An Altivar drive is used to:

• Control motor speed
• Reduce energy consumption
• Provide soft-start functionality
• Optimise process control
• Limit mechanical loads

Altivar systems are widely applied in:

• Pump systems
• Fans
• Conveyor belts
• HVAC installations
• Compressors
• Water treatment
• Process industry

In modern IT OT Convergence environments, Altivar drives function as intelligent field components integrated with PLC, SCADA, MES and industrial networks.

⚙️ How an Altivar variable frequency drive works

An Altivar drive controls AC motor speed by dynamically regulating the frequency and voltage of the supply current.

The basic operation consists of three steps:

Typical architecture:

AC mains supply      │Rectifier      │DC bus      │IGBT inverter      │AC motor

By varying the output frequency, motor speed can be controlled precisely.

Key benefits:

• Energy savings
• Less mechanical wear
• Smooth acceleration
• Higher process efficiency
• Lower peak currents

🏭 Altivar product families

Schneider Electric offers several Altivar series for different applications.

The choice depends on:

• Power range
• Control precision
• Safety functionality
• Network integration
• Motion control
• Environmental conditions

🔄 Motor control and control methods

Altivar drives support several control strategies.

Applications:

• Pump control
• Fan control
• Conveyor systems
• Extruders
• HVAC
• Lift installations

For dynamic processes, vector control is often applied because of:

• Faster response
• Higher accuracy
• Better low-speed behaviour
• More constant motor torque

🌐 Industrial communication

Modern Altivar drives support extensive industrial communication.

Communication is used for:

• Start/stop commands
• Setpoints
• Diagnostics
• Alarms
• Energy consumption
• Predictive maintenance

⚡ Energy efficiency

One of the main benefits of Altivar systems is energy saving.

For applications such as pumps and fans, the affinity law applies:

P∝n3P \propto n^3P∝n3

A small speed reduction can therefore lead to large energy savings.

Practical example:

This is why variable frequency drives are widely applied in:

• HVAC
• Water pumps
• Ventilation systems
• Compressors

🧠 Intelligent Drive Management

Modern Altivar drives contain extensive intelligence.

Functionality:

• Self-diagnostics
• Predictive maintenance
• Energy analysis
• Trending
• Event logging
• Fault detection

Parameters that are monitored:

This information is often integrated with:

• SCADA
• Historian
• MES
• Industrial AI
• Predictive Maintenance

🛡️ OT security and Altivar

Modern variable frequency drives are network-connected OT assets and therefore represent a potential attack surface.

Key risks:

Common attack vectors:

• Unprotected Ethernet ports
• Weak passwords
• Open Modbus communication
• Outdated firmware
• Poor network segmentation

Variable frequency drives are therefore increasingly included in OT security programmes based on:

• IEC 62443
• Defense in Depth
• Zero Trust
• Asset Inventory
• Monitoring
• Industrial Firewall

🔥 Functional safety

Many Altivar systems support integrated safety functions.

Common safety functions:

These functions are used in:

• Robotics
• Conveyor systems
• Machine safety
• Process installations

Integration takes place with:

• Safety
• Safety PLC
• SIL
• IEC 61508
• ISO 13849

🌡️ Practical example: water treatment

In water treatment plants, Altivar drives are widely used for pump control.

Typical architecture:

SCADA   │PLC   │Industrial Ethernet   │Altivar drive   │Pump motor

Functionality:

• Dynamic pressure control
• Energy savings
• Soft-start
• Dry-running detection
• Alarm management

Benefits:

• Lower energy costs
• Less water hammer
• Longer pump lifespan
• Better process stability

🔌 Harmonics and power quality

Variable frequency drives generate harmonic distortion on electrical networks.

Possible consequences:

• Additional heat generation
• Worse power factor
• Network disturbances
• Resonance issues
• Transformer overload

Mitigation measures:

In larger installations, harmonic analysis is often performed during engineering.

🌐 Ethernet-native drives

Newer Altivar platforms are strongly Ethernet-oriented.

Benefits:

• Centralised monitoring
• Faster diagnostics
• Remote management
• Integration with cloud platforms
• Predictive maintenance

Drawbacks:

• Larger attack surface
• More dependence on network stability
• Higher security complexity

Modern drive networks are therefore often designed in line with:

• Zones and Conduits Model
• Network Segmentation
• Industrial Ethernet
• OT Network

⚠️ Failure modes in OT environments

Common failures in variable frequency drives:

OT design therefore takes into account:

• Redundancy
• Fail-safe behaviour
• Alarm management
• Spare parts
• Lifecycle management

🔍 Lifecycle Management

Drives often have an operational lifespan of 10-20 years.

Lifecycle challenges:

• Firmware management
• EMC compatibility
• End-of-life components
• Cooling issues
• Spare parts

Key management processes:

• Lifecycle Management
• Patch Management
• Asset Management
• Configuration Management

📈 Integration with Industry 4.0

Modern Altivar platforms support integration with:

• Industrial AI
• Digital Twin
• Edge Computing
• Industrial Internet of Things
• Unified Namespace

This allows variable frequency drives to function as intelligent data sources within smart manufacturing architectures.

Real-time data from Drives is used for:

• Predictive Maintenance
• Energy optimisation
• Process optimisation
• Asset analytics