Three-phase frequency converter

digitalIP20IP54

Schneider Electric compact frequency converters series ATV are converters with intermediate voltage circuit, made on IGBT-transistors with pulse-width modulation. They convert three-phase current system with constant frequency and amplitude to three-phase current system with variable frequency and voltage. Frequency converters are provided for motors with capacity from 0.75 kW up to 355 kW. In standard design, they operate in two-quadrant mode. Upon additional request (optionally), frequency converters can operate in four-quadrant mode. For this purpose braking chopper is built into converter or energy recovery module is additionally supplied. Circuit throttle is built into all frequency converters. Graphic panel with LCD indication, provided with Cyrillic characters and texts in multiple languages, is applied for control and service. Frequency converters provide operation with low level of noise and losses. Inverter modulation frequency is set during adjustment within a range from 1 up to 16 kHz. Application benefits: high dynamics of motor running torque testing due to current components vector based control system; constant torque start and high rotation accuracy; frequency converters are resistant to no-load operation, short circuits and earth faults, any supply network and load deviations; implementation of individual and multi-motor drives in technological process; steel galvanized casing provides maximum protection against interferences, mechanical and climatic impacts. Drives rotational frequency is adjusted smoothly and with low losses in wide range of motor mechanical characteristics due to application of digital control system,