Uninterrupted rescue operation

A method of operating an elevator system, the method comprising:

• controlling, using a controller, a plurality of components of the elevator system, wherein controlling comprises operating at least one of an internal power source, an elevator car, a drive unit, a power conversion device, and a brake;
• detecting, using the controller, when an external power source is unavailable;
• deactivating, using the controller, the power conversion device when an external power source is unavailable;
• determining, using the controller, a mode of the elevator car, wherein the mode includes a regenerative mode;
• determining, using the controller, a run profile of the elevator car when the regenerative mode is determined;
• and
• operating, using the controller, the elevator car in response to the run profile determined.

An apparatus for operating an elevator system, the apparatus comprising:

• an internal power source;
• an elevator car;
• a drive unit;
• a power conversion device;
• a brake;
• and
• a controller to control a plurality of components of the elevator system,
• wherein controlling comprises operating at least one of the internal power source, the elevator car, the drive unit, the power conversion device, and the brake,
• wherein the controller performs operations comprising:
• detecting when an external power source is unavailable,
• deactivating the power conversion device when an external power source is unavailable, and
• determining a mode of the elevator car, wherein the mode includes at least one of a motoring mode, a near balance mode, and a regenerative mode.