Energy-efficient drives

• Информационные материалы

  Информационные материалы

  Energy-efficient SINAMICS drives save energy in an intelligent way

  Exploit energy-saving potential and optimize energy consumption: You can - with intelligent SINAMICS drives Depending on the application in question, energy consumption can be controlled by motor speed adjustment to suit the individual process and achieve the greatest possible energy savings. The energy consumption of drives for turbomachines can be cut by as much as 60%. Regenerative feedback is also an option for many applications. Our portfolio of frequency inverters is the most comprehensive and standardized range on the market and the first choice for anyone seeking an energy-efficient drive – at low-voltage or medium-voltage level.

  Energy-efficient drives with intelligent functions

  Depending on the application and load profile, the intelligent energy-saving functions of SINAMICS drives can cut energy consumption.

  PROFIenergy

  

  Provides energy-related status data for the system components to create transparency for the energy management; energy savings by selective shutdown of plants or plant sections.

  ECO mode

  

  In ECO mode, the operating point of the motor in the partial-load range is automatically adjusted and optimized. This reduces motor losses, for example, in machines that do not need a high torque over the entire operating range.

  Hibernation mode

  

  Variable-speed drives that are not required to operate continuously are switched to standby or “Hibernation mode". The drive is restarted again as soon as it is needed.

  Bypass mode

  

  In bypass mode it is possible to "bypass" the inverter electrically as soon as the motor is frequently operating close to its rated speed. This solution helps to reduce inverter losses and so increase overall efficiency.

  Cascading

  

  In pump, fan and compressor applications involving high outputs, the entire power demand is distributed among several motors. Phased connection and disconnection by means of partially or fully controlled cascades in combination with inverters make a drive system more energy-efficient.

  Energy balancing

  

  Through the use of inverters with coupled drives, energy is exchanged through the common DC link. Through the direct energy exchange from one inverter to the next, it is possible to minimize power losses in the system.

  Reactive power compensation

  

  The use of SINAMICS inverters with Active Line Modules reduces the capacitive and/or inductive reactive power in the machine. It is then possible to dispense with costly reactive power compensation systems.

  Kinetic energy buffering

  

  With dynamic reversing operations in single-axis and multi-axis systems, the kinetic energy available in the system is reused. A motor connected to the common DC link is used to buffer kinetic energy.

  Electrical energy buffering

  

  With dynamic reversing operations in single-axis and multi-axis systems, the kinetic energy available in the system is reused. A capacitor module connected to the common DC link is used to buffer electrical energy.

  Optimized pulse pattern

  

  Thanks to optimized clock frequency and pulse pattern, SINAMICS G and SINAMICS S are perfectly suited to SIMOTICS motors. The benefits: Optimization of performance and system efficiency, reduced system losses as well as lower temperature and noise levels.

  Energy usage counter/Energy saving counter

  

  Actual energy usage can be displayed during operation. Furthermore, an energy saving counter can be installed to indicate the cumulative energy savings during machine operation as compared to a fixed-speed application.

  Regenerative feedback

  

  In conventional drive systems, the energy produced during braking is converted to heat using braking resistors. SINAMICS G and SINAMICS S inverters with regenerative feedback capability need no braking resistor, and supply the resulting braking energy back into the line.

  DC link coupling with SINAMICS V20

  

  Applications with two SINAMICS V20 inverters with the same power rating can share a common DC link in order to reuse regenerated energy.

  Overview of energy-saving functions for SINAMICS drives

  Energy-saving function	SINAMICS V	SINAMICS G							SINAMICS S
  	V20	G110	G110D	G120C	G120P	G120	G110M	G120D	S110	S120
  ECO mode	✓	–	–	✓	✓	✓	✓	✓	✓	✓
  Hibernation mode	✓	–	–	–	✓	✓ with CU230P‑2 Control Unit	–	–	–	–
  Bypass mode	–	–	–	–	✓	✓ with CU230P‑2 Control Unit	–	–	–	✓
  Cascading	✓	–	–	–	✓	✓ with CU230P‑2 Control Unit	–	–	–	–
  Energy balancing	✓	–	–	–	–	–	–	–	–	✓ for multi-axis drives only
  Reactive power compensation	–	–	–	–	–	–	–	–	–	✓ with Active Line Module
  Kinetic energy buffering	–	–	–	–	–	–	–	–	–	✓ for multi-axis drives only
  Electrical energy buffering	–	–	–	–	–	–	–	–	–	✓ for multi-axis drives only
  Optimized pulse patterns	–	–	–	–	–	–	–	–	–	✓
  Energy usage counter/Energy saving counter	✓	–	✓	✓	✓	✓	✓	✓	–	✓
  Regenerative feedback	–	–	–	–	–	✓ with PM250 Power Module	–	✓	–	✓ with Smart Line Module or Active Line Module
  Communication protocol and profile
  PROFINET	–	–	–	✓	✓	✓ not for CU240B‑2 Control Unit	✓	✓	✓	✓
  PROFIenergy	–	–	–	✓	✓	✓ not for CU240B‑2 Control Unit	✓	✓	–	✓