Control Apparatus for Hybrid Construction Machine

A control apparatus for a hybrid construction machine, comprising:

• an engine;
• a motor generator driven by the engine and capable of generating electric power;
• a hydraulic pump driven by total torque of the engine and the motor generator;
• a plurality of hydraulic actuators driven by hydraulic fluid delivered from the hydraulic pump;
• a power storage device that stores electric power generated by the motor generator and supplies electric power for driving the motor generator;
• an inverter that performs transfer of electric power between the power storage device and the motor generator;
• a filter that collects a particulate material in exhaust gas of the engine;
• and
• a control section that outputs a command signal to the inverter in order to control powering operation or regeneration operation of the motor generator, wherein
• the control section includes
• a filter regeneration decision section that decides a demand for regeneration of the filter,
• a torque command value calculation section that calculates an ordinary torque command for the motor generator, and
• a powering operation limitation section that inputs thereto the ordinary torque command for the motor generator calculated by the torque command value calculation section and a demand signal for regeneration of the filter decided by the filter regeneration decision section and calculates the command signal in response to the input signals, and
• the powering operation limitation section calculates, when the demand signal for regeneration of the filter is available, a command signal for limiting the powering operation of the motor generator.