15-335 HP Rotary Variable Speed Drive
Challenge: How to combine a wide flow range with high performance and outstanding energy efficiency.
Myth: A variable speed drive can be retrofitted to any compressor system.
Learn from us: Not all compressors are suited to be retrofitted with a variable speed drive system. But, for those systems where a thorough analysis has been conducted and the potential for improved efficiency has been identified, there are many benefits to a VSD application. At the heart of the benefit is matching output to varying demand while optimizing energy consumption. After a thorough and accurate analysis by Hope Air Systems, you will be on your way to higher productivity and lower operating costs.
Hope Air Systems responds: Hope Air Systems engineers and technicians are trained to uncover an accurate picture of how your system operates. The analysis will be based on the following:
- compressed air demand over time
- actual system pressure vs. required system pressure
over time
- air purity requirements
Using special air demand analyzers, which are hooked up to an existing air compressor system, we can get a clear picture of your systems operations.
Let's consider a variable speed drive: Hope Air Systems understands that not every air compressor system can benefit from a variable speed drive. For those plant requirements where such a system would be desirable it's important to get the right equipment to meet the needs. Kaeser has developed its Sigma Frequency Control series of air compressors to meet these stringent requirements. Featuring its innovative Sigma Profile airend and Siemens state-of-the-art drive technology, this series of machines are unmatched in providing a drive motor and airend that operate at low rotational speeds resulting in exceptional reliability, efficiency and long life.
Sigma Control
The Kaeser compressor control system features an industrial-based PC, microprocessor and real-time operating system. Five different control configurations are available to precisely match compressor performance to air demand.
Precise pressure control
Kaeser "SFC" (Sigma Frequency Control) compressors precisely control system pressure to plus/minus 2 psig using highly accurate sensors and the Sigma Control System to control motor speed. This eliminates over-pressurizing and increases energy savings.
Drive system technology
Kaeser SFC drive systems feature electromagnetic interface (EMI) filters, contactors for galvanic separation and line reactors for superior protection. Drive cabinet cooling fans maintain proper operating temperatures even under extreme ambient conditions.
EMI filter
Kaeser SFC drive systems are designed with an electromagnetic interference filter that eliminates or isolates all feedback and prevents harmonic distortion from entering the plant's electrical grid.
Soft starts
Kaeser SFC units offer a "soft rise" in motor starting current from zero to full load without current spikes or excess heat rise. This allows unlimited motor starts and since the SFC drive yields a "near unity power factor," power factor penalties are also eliminated.
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