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Medium Voltage - Adjustable Speed Drive BG - 6000 ASD

Switchgear | Soft-Starter | Motor Control Center | Adjustable Speed Drive | Motors


• Medium Voltage ASD up to 20,000 HP
     
•   OEM Drive Packages can be supplied with all necessary Switchgear, Bypass Contactors, Protection & Control Relaying and PLC Interface.
     
•   Inverter is a Modular System consisting of IGBT base Pulse-Width-Modulated ( PWM ) converters. The multi-level arrangement takes advantage of the IGBT natural characteristics. The structure of this Inverter and the modulated strategy adopted produces a motor-friendly output voltage with a sinusoidal current waveform.
     
•   As for the control, the inverter regulates the motor voltage, frequency and current in order to meet the shaft torque and speed requirements of the load. Digital control is provided by a high performance microprocessor that performs extremely tight frequency control over a widespeed range. All pertinent signals are available with an easy-to-use operator interface allowing complete configuration and control of the drive operation. Full diagnostics are available via the user interface for easy and fast trouble shooting.
     
•   As an option, an output filter consists of a low-pass LC circuit which converts the PWM output voltage from the inverter to sinusoidal motor voltage. This allows the use of standard motors without the special insulation otherwise required for PWM operation.

 
 

 
 
•   Medium Voltage ASD 1000 to 20,000 HP air cooled modular construction for ease of servicing and coordinated maintenance.
     
   
 
•   Medium Voltage ASD 1000 to 20,000 HP air cooled modular construction with Multi Tap Transformer Section.
     
   
 
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Multi Cell ASD construction indoor - outdoor to meet any harsh environments. BABCO can provide all necessary Switchgear, Controls, PLC Interface and the Electric Motor and be totally responsible for the whole Integrated System.
     
   

Advanced Motor Control

The heart of the motor control of the SV9000 is formed by the sensories vector control, the adaptive motor model and the highly developed ASIC circuit. The vector control is done in a system of stator flux coordinates. Control is not affected by changes in the parameters of the motor.

Measurement of the motor current is controlled by ASIC to avoid current ripple. Motor voltage values are obtained directly from the ASIC.

Torque value and magnetizing current are calculated every millisecond by the vector calculation and sent to the motor controller. Using these values the controller will form the set values for the ASIC circuit that controls the drive's IGBTs so the motor runs at an optimum operating point, and produces the right torque and precise speed.

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