The optimal products for your refrigeration and air conditioning technology
Frequency converters are not necessarily used in refrigeration units because many of these units operate in on/off mode and therefore do not require a power control. When the motor speed must be adjusted flexibly though, a frequency converter must come into play.
A power control via frequency converter has many advantages, for example, the efficiency of the unit can be significantly improved. In addition, users benefit from the very smooth running of the unit. Motors with higher speeds also require a frequency converter – the limit is 50 Hz or 3,000 rpm.
Innovative refrigeration units with turbo or centrifugal compressors are increasingly in demand with higher power ranges in this industry. These units operate with much higher speeds of more than 100,000 rpm. Frequency converters by SIEB & MEYER easily provide the required speeds and their control method ensures an exceptionally low rotor heating. In addition, the devices can be adjusted to changing requirements very well thanks to the flexibly configurable software.
Product Overview
| Device series | Power range | Input voltage | Technology | Speed (frequency) | Type | Communication | Safety functions |
|---|---|---|---|---|---|---|---|
| SD2S | 0.3 .. 55 kVA | 115 .. 480 VAC | 2 Level PWM | 120,000 1/min (2,000 Hz) | Single-axis device | RS232, CAN Bus, EtherCAT, via Gateway: Profibus, Profinet | STO |
| SD2M Turbo | 80 .. 432 kVA | 230 .. 480 VAC | 3 Level PWM | 120,000 1/min (2,000 Hz) | Single-axis device | RS232/485, CAN Bus, EtherCAT, via Gateway: Profibus, Profinet | STO |
| SD4S | 0.8 .. 66 kVA | 115 .. 230 VAC | 2 Level PWM | 240,000 1/min (4,000 Hz) | Single-axis device | CANopen EtherCAT, (Profinet, Powerlink) | STO |
| SD4M | 80 .. 470 kVA | 230 .. 480 VAC | 3 Level PWM | 240,000 1/min (4,000 Hz) | Single-axis without ballast circuit | CANopen, Ethernet, EtherCAT | STO |
Products precisely tailored for your application
With our experience from customized drive systems that are meanwhile produced in large series and as well as our standard devices, we are supporting you from the project planning phase to the series production.