| 摘要 |
PROBLEM TO BE SOLVED: To stably and inexpensively obtain a desired machine power without scattering high-frequency noise from the power of irregularly fluctuating solar ray. SOLUTION: Frequency of a power system is increased gradually by a universal inverter when a system is to be started, an induction machine A is started, then the induction machine A is connected to a solar battery 20 via a general- purpose inverter, and a rotary shaft 100 of the induction machine A is connected directly to the rotary shaft 100 of another induction machine B, being directly connected to a power system for parallel operation regarding power. When amount of insolation is small, the induction machine B is used as an electric motor for taking care of the induction machine A and a machine load 50. When the amount of insolation is large, the machine load is driven by the solar battery 20, and the induction machine B is used as a generator for supplying to the power system. This system can utilize the sunlight power without waste, while continuously making the machine load 50 rotate, regardless of weather conditions. |
