초록 ▼

A system and controller for providing emergency power to an electrical load when a usual source of power for the load has failed, includes an electrical dynamo, an engine of controllable speed connectable by clutch to drive by a fixed speed ratio the dynamo, a continuously spinning flywheel to provi

A system and controller for providing emergency power to an electrical load when a usual source of power for the load has failed, includes an electrical dynamo, an engine of controllable speed connectable by clutch to drive by a fixed speed ratio the dynamo, a continuously spinning flywheel to provide power while the engine is coming up to speed and during transient loads thereafter, and a control system. The flywheel is also connected with the dynamo, through a variable-speed transmission. When the engine is driving the dynamo, the speed of the engine is controlled by a loop, which involves sensing the torque of the flywheel, comparing the flywheel's speed with a first reference, and adjusting the throttle according to the difference. Simultaneously, the speed ratio of the variable transmission is controlled by a second loop, which involves sensing the output frequency of the dynamo, comparing it with a second reference to get a difference signal, and adjusting the transmission's ratio in accordance with the difference signal. For short interruptions of the usual power source, the flywheel provides emergency power and the engine is not started.

대표청구항 ▼

[ I claim:] [1.] A system for providing power to an electrical load when a usual source of power for the load has failed, comprising:an electrical dynamo (10) connected with said load;an engine (16) of controllable speed connected for mechanically driving, with a fixed speed ratio, said dynamo;energ

[ I claim:] [1.] A system for providing power to an electrical load when a usual source of power for the load has failed, comprising:an electrical dynamo (10) connected with said load;an engine (16) of controllable speed connected for mechanically driving, with a fixed speed ratio, said dynamo;energy storage means (22) for providing energy when said usual source of power has failed;a first sensor (39) connected with said energy storage means for sensing a quantity dependent upon the energy stored in said energy storage means and providing a first signal indicative of said quantity;a first controller (60) responsive to at least said first signal and having an output connected with said engine for controlling the torque of said engine;transmission means (26) having a variable transmission ratio between its two ends, drivably connected between said energy storage means at one end and said dynamo at the other end;said transmission means being drivably intermediate said flywheel and said engine so that said flywheel is separated from said engine by at least said transmission means;said transmission means including transmission control means (110) for controlling said variable transmission ratio;a second sensor (74) connected with said dynamo for sensing the frequency of said dynamo and providing a second signal dependent upon said frequency;a second controller (70) connected with said transmission control means (110) and connected to receive and respond to at least said second signal for controlling said transmission ratio of said transmission means to produce a predetermined reference speed at the end of said transmission nearer to which said dynamo is connected;whereby said dynamo (10) is drivably connected simultaneously with both said engine (16) and said transmission (26), and the torque of said engine is controlled by said first signal indicative of said quantity dependent upon the energy stored in said energy storage means (22).