Electrostatic precipitator system HV controller - represses voltage converter in response to loading exceeding predetermined limit during corresp. time interval

摘要

The precipitator system includes a voltage controller which produces from an alternating power source a variable output. This variable output drives a high voltage converter which applies a high voltage to a precipitator. This variable output is controlled by a control signal from a command subsystem. Preferably, the command subsystem is operative to repress the drive to the high voltage converter in response to its loading exceeding a predetermined limit during a corresponding limit interval. After this limit interval, the command subsystem is operative to rapidly restore productive drive to the high voltage converter, preferably by the next half cycle of the power source that has a polarity opposite to that existing at the beginning of the limit interval. In this fashion stabilized operation is quickly achieved. Also included, preferably, is a conductive element that is coupled to the high voltage converter.