
1336F-BX040-AN-EN-HCS2-L5 A-B Control Unit
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IN STOCK1336F-BX040-AN-EN-HCS2-L5 A-B Control Unit
The proven CHB topology combines an integrally mounted phase shifting isolation transformer and series-connected power modules for each phase. In addition to stepping down the input voltage, the isolation transformer also provides two other principal functions: • Mitigate common mode voltage stress so motors with standard insulation levels can be used. • Reduce Total Harmonic Distortion (THD), due to the phase shifting of its secondary windings, so input side harmonics don’t negatively impact the plant or utility power grid. A number of identical low voltage power modules are series-connected (cascaded) together to produce the medium voltage levels required to operate the motor. The voltage step for each module is relatively small and a Pulse Width Modulation (PWM) switching pattern is used so output harmonics and torque pulsations at the motor are minimal, even at lower speeds. This technology is very motor friendly so standard motors can be used for new applications and it also is ideal for retrofitting existing motors. This also allows for the motor cable lengths required for most applications, without the requirement for output filtering. This power module concept makes maintenance quick and easy. Each module has powerful built in diagnostics to identify and isolate a module needing replacement, in the unlikely event of a failure. This minimizes power module replacement time, so process uptime is maximized.
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