LOHER DYNAVERT I drive units are currentsource DC link inverters that are used to control induction motors. They have a fully controlled B6 bridge circuit on the line side and a B6 inverter circuit on the output side, which utilizes the principle of interphase commutation; this distributes the DC link current from the DC link reactors with a square waveform with frequency f to the motor winding. As a consequence, the motor cable length is almost unlimited.
The power flows from the line supply to the motor for a motoring load. For regenerative operation, the rectifier on the line-side feeds the regenerated energy back into the line supply. This means that from the inherent principle, 4?quadrant operation is possible without requiring any additional measures. 12- and 24?pulse versions further reduce the harmonics fed back into the line supply. For this reason LOHER DYNAVERT I is the ideal replacement for SIMOVERT A.
Features
Explosion protection
ATEX?certified for motors located in hazardous zones with Accessory kit S, also with very long motor cable length
Emergency Off
The Emergency Off function prevents unexpected starting in compliance with EN 60204?1, implemented according to EN 954?1, Category 3, respectively SIL2 with Accessory kit S
Power unit
12- and 24?pulse input optional posible. For this reason gi line supply (basic fundamental) of 99.9 % is possible
This corresponds to the EMC Directives (EN 61800?3 environment 2) as a result of the line filter integrated as standard
Low harmonics fed back into the line supply as a result of the integrated line reactor
Long motor cable lengths possible inherent to the system
Insulation monitoring for IT line supplies for 500 V/690 V drive units as well as ground fault monitoring for TN and TT line supplies integrated in the 400 V drive units
Wide supply voltage range
Normal fuses can be used for protection (gL characteristic)
Control section
High level of personnel and plant protection through protective separation between the analog and digital control peripheral and the power unit according to VDE 0106/EN 50178
Operator control and setting
Transparent operator control and setting using a menu-prompted 4?line plain text display with membrane keypad at the drive inverter – or up to 1000 m away in the main control room via RS485
Extensive functions using the Windowsbased PC operator control program
Communication
Communication via a conventional terminal strip with freely?programmable digital and analog inputs/outputs, with
parameterizable limit value signals
parameterizable timers
parameterizable damping elements
parameterizable drive inverter behavior when inputs/outputs respond
Communication and parameterization via
PC using IMS (Inverter Management Software) via RS232/RS485
external operator panel via RS485
bus systems such as Profibus DP or Modbus RTU
Drive behavior for LOHER DYNAVERT I
Two closed?loop control types for induction motors:
Speed control
Torque control
Full 4?quadrant operation with regenerative braking as standard
The following generally apply
Automatic slip compensation
Stall protection using current limiting control
Flying restart circuit to connect to a rotating motor
skener.ru
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Арматура DENDOR
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Датчики и измерители
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Регуляторы и регистраторы
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Пневматическое оборудование
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Краны и Клапаны
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Измерительные приборы
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Системы беспроводного управления «умный дом»
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Бесконтактные выключатели Конечные выключатели Оптические датчики Энкодеры
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SKW-FS - Установка умягчения
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SKW-FK - Установка обезжелезивания