Systems and methods for active power management in a medical device

A respiratory therapy device comprising:

• a power supply;
• a flow generator configured to provide a flow of breathable gas to a patient;
• a respiratory therapy component that is electrically connected to the power supply;
• at least one controller configured to execute:
• flow generator control configured to control current supplied from the power supply to the flow generator, and
• therapy component control configured to:
• calculate a first target operating parameter for the respiratory therapy component, and
• generate, based on the first target operating parameter, a control signal for controlling the respiratory therapy component;
• power consumption circuitry that is configured to generate a power consumption signal that is based on power supplied from the power supply to components, including the respiratory therapy component, of the respiratory therapy device;
• and
• a hardware logic gate configured to output a respiratory therapy component control signal to control operation of the respiratory therapy component, the hardware logic gate configured to receive a first input signal and a second input signal, wherein the first input signal is based on a power consumption signal, wherein the second input signal is based on the control signal.

A respiratory therapy device comprising:

• a power supply;
• a flow generator configured to provide a flow of breathable gas to a patient;
• a respiratory therapy component that is electrically connected to the power supply;
• one or more current sensors configured to measure current supplied to the flow generator, and current supplied to the respiratory therapy component;
• at least one hardware processor configured to:
• execute a flow generator control loop at a first rate, the flow generator control loop configured to control current supplied to the flow generator based on a therapeutic target,
• execute an active power management loop at a second rate, which is faster than the first rate, the active power management loop comprising:
• receiving, from the one or more current sensors, measurements of:
• a first measured current supplied to the flow generator,
• a second measured current supplied to the respiratory therapy component, and
• calculating a total power consumption based on the first measured current and the second measured current;
• and
• based on determining that the total power consumption exceeds a power threshold, causing a control signal that is delivered to the respiratory therapy component to be adjusted to reduce power delivered to the respiratory therapy component.