Frekvenční měniče Katalogy, manuály (EN+CZ)

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Vydal: ABB s.r.o, ELSYNN Autor: ABB ELSYnn

Strana 617 z 825







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Parallel connected supply units It possible connect two supply units parallel to the same bus get higher pow redundancy. This possibility concerns parallel connection two diode supply units (DSU+DSU), two IG supply units (ISU+ISU), DSU and ISU to the same bus. Non-standard resistors can used providing that the specified resistance value not decreased and that the heat dissipation capacity the resistor sufficient for the drive application. This configuration reduces harmonics the supply network. Brake unit In resistor braking henever the voltage the intermediate circuit frequency converter exceeds a certain limit, braking chopper connects the circuit to a braking resistor. The converter can operate both m otoring and generating odes.2009 Product series. The control also provides near unity power factor. Redundancy needed critical processes and also w hen aintenance intervals are long. hen line voltage low. Using DSU+ISU connected parallel solution for w hen the need for braking pow uch lower than for motoring power.2. Standard braking resistors are separately available in their own cabinets. These two units will located the rear ends of the drive bus. The voltage constant and the line current sinusoidal. AC800M control unit (optional) The multidrive concept also includes the control unit for the AC800M and S800 I/O.IGBT supply unit (ISU) An IGBT supply unit used regenerative drive systems convert three-phase voltage DC voltage. The unit can also boost voltage e.g. ISU dimensioned for braking pow and operates continuously, while DSU is dimensioned for otor power minus ISU power. The converter hardware compatible with drive units. The main circuit consists main switch, filter and converter. Higher power needed, for exam ple, high power applications here gives ore drive flexibility to connect drive units the sam bus, for high overload requirements. A fully regenerative supply unit with power factor requires pow compensation. 3AFE68248531 REV 20. The thyristor supply unit contains two 6-pulse thyristor bridges antiparallel connection. has the ability regenerate back the mains, providing considerable energy savings with applications having excessive braking powers. The control unit is equipped with communication interfaces, power supplies and the front-devices necessary for the automation equipment. 12-pulse bridge configuration can implemented with two thyristor supply units supplied three-winding transformer. Thyristor supply unit (TSU) A thyristor supply unit used regenerative drive systems convert three-phase voltage DC voltage. pow control gives the sam firm but gentle perform ance DTC gives otor control. The control perform ance excellent due the ultra-fast control technology, the same DTC. Harmonic content remains extremely low due DTC control and LCL filtering