Transcritical CO₂ Compressors – High-Efficiency LSPM Motor Technology
Transcritical CO₂ Compressors with LSPM motors combine robust compressor engineering with advanced motor technology for efficient use in modern refrigeration and heat pump systems. BOCK’s LSPM technology combines the strengths of asynchronous motors with squirrel cage rotors and the low-loss operation of synchronous permanent magnet motors.
This combination provides a reliable solution where improved system efficiency, flexible capacity control and reduced operating costs are important considerations.
Flexible Capacity Control
A key advantage of Transcritical CO2 compressors is their ability to provide almost stepless capacity regulation, allowing compressor output to adapt more closely to changing refrigeration demand.
Key benefits include:
- Almost stepless capacity regulation
- Wide capacity range between 100% and 25%
- Higher average evaporating temperatures
- Reduced compressor start-stop cycles
- Lower risk of compressor and motor wear
- Longer motor operating life
- Improved overall system efficiency
- Reduced investment and operating costs
Integration with Existing Refrigeration Controls
Transcritical CO₂ Compressors can be integrated into existing system controllers where digital capacity regulation for reciprocating compressors is available. This provides engineers and system designers with greater flexibility when incorporating the technology into suitable refrigeration and heat pump installations.
The technology is universally applicable for both digital and conventional capacity control and can provide an attractive alternative to frequency inverter solutions.
Efficient CO₂ Refrigeration and Heat Pump Performance
Combining LSPM motor technology with flexible capacity regulation helps refrigeration systems operate efficiently across changing load requirements. Minimising unnecessary compressor starts and stops can also reduce wear while supporting longer motor life and dependable system performance.
For modern refrigeration and heat pump applications requiring efficient capacity control, Transcritical CO2 compressors with LSPM motors provide a flexible solution designed to improve efficiency, reduce operating costs and support reliable long-term operation.



