Abstract: A vibration electric generator includes two generator units connected with each other in a lever manner. Each generator unit includes: a moving part configured to move in a linear manner; a permanent magnet attached to the moving part, the permanent magnet being configured to provide a magnetic field; a fixed stator including a plurality of windings; and a cushion made from an impact absorber and installed at each end of the moving part. Due to a vibration motion of a first frequency, the stator is configured to also move in the first frequency. The moving part is configured to move in a second frequency that is different from the first frequency.

Abstract: A solar powered vehicle air-conditioning system for air conditioning a vehicle includes an air conditioning subsystem and a solar power subsystem. The air conditioning subsystem includes a compressor, a condenser, an evaporator and a plurality of valves and sensors, and is configured for air conditioning the vehicle. The solar power subsystem includes a solar photovoltaic module configured for generating electric power when being illuminated by sunlight, a battery module configured for providing electric power to the air conditioning subsystem, and a solar power control module configured for receiving the electric power from the solar photovoltaic module and charging the battery module thereby. The solar power control module is configured to regulate the charging current flowing from the solar power control module to the battery module to be equal to or less than a predetermined current value.