CONTROLLING OF VARIABLE DC BUS VOLTAGE IN A MOTOR
CONTROLLING OF VARIABLE DC BUS VOLTAGE IN A MOTOR
A method and apparatus for controlling a variable direct current (DC) bus of a motor drive are provided. A controller receives, over a first input, first and second component voltages of a first direct current (DC) voltage of the electric drive and determines an additional boost ratio of the electric drive based on the first and second component voltages. The controller determines a boost ratio of the electric drive as a sum of a minimum boost ratio and the additional boost ratio. The boost ratio is a ratio by which the electric drive steps up a second DC voltage into the first DC voltage. The controller generates a control signal for controlling the electric drive based on the boost ratio and outputs the control signal over an output.