Refrigeration engineering and heat pumps

Higher performance requirements, energy efficiency and specifications to use environmentally friendly or natural refrigerants (such as CO₂) are leading to a rapid increase in frequency drive-controlled compressors.

This applies to all types of compressors, such as rotary compressors, scroll compressors or reciprocating compressors. The use of speed-controlled pumps and fans is also steadily increasing in order to preserve resources.

Typical applications

Industrial cooling
Medical technology
Machine tools
Building technology

Flyer: Refrigeration with Lenze VFDs

Application Guide: Refrigeration with Lenze VFDs

Quick Start Guide: Refrigeration
with Lenze VFDs (EN)

Communicative and safe

The compact i550 cabinet (here 11 kW / 15 hp) permits the connection of all necessary fieldbuses with predefined PLC modules.

The optional integrated STO functionality offers protection against overpressure in the cooling circuit.

Further applications in refrigeration technology for pumps and fans can be solved in the same way with the cost-optimized i510 cabinet drive.

Refrigeration compressor in inverter mode

Lenze variable frequency drives provide

Energy efficiency

Lowest energy losses with the i-series

PID controller

Integrated, easy to operate and powerful,
e.g. for negative pressure control

Higher motor frequency

50 to 80 Hz leads to an increase in
output power for the same compressor
size compared to direct-on-line operation.

Compact drives

Reduction of control cabinet costs
with integrated EMC filter
also for decentralized mounting

Parameterization

Simple
Without mains power
Via USB

Hot gas overpressure protection

Optional STO module integrated in the i550.

BLDC motors

Operation is supported by the drives.

IIoT – Drives as sensor

Transfer of valuable data such as
current values, duty cycles etc. via
a fieldbus interface to the control system (PLC)