| 摘要 |
A power supply unit (10) that prolongs the operation of an electrical motor (11) without refuelling and is suitable for explosive or inflammable atmospheres is provided. An electrical storage device (12) supplies electrical power to the motor (11). The motor (11) drives a first electrical current generator (20) providing a source of electrical supply and a second electrical current generator (22) supplying a charging current to the electrical storage device (12) via a battery charger (25). Preferably, the electrical current generators (20, 22) are alternators. The electrical storage device (12) may be a pair of 12v batteries (12), or in the case of a power supply unit (40) fitted to a vehicle (41), the battery (43) of the vehicle (41). In the latter case, a pulley (50) on an axle (51) of the vehicle (41) drives the motor (45) when the vehicle (41) is moving. |
