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1. WO2000015457 - DRIVING MEANS

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

1. Power supply for vehicles and/or machines and including in combination
a. an electrical permanent magnet motor (PM-motor) (12),
b. a hydraulic pump (14) connected to the output axle of the PM-motor (12),
c. at least one hydraulic operating device (16) connected to the pressure line of the hydraulic pump (14)
d. a closing off valve ( 15) in the hydraulic line between the hydraulic pump (14) and the operating device (16)
e. at least one electronic control unit (13) for the PM-motor' s (12) rotation speed and f at least one electric storage battery (11) for powering the PM-motor (12).

2. Power supply according to claim 1,
characterised by
the electronic control unit' s including a microprocessor (21) and a current controller (24), for example a potentiometer or the like

3. Power supply according to claim 1,
characterised by
the PM-motor' s ( 12) and hydraulic pump ' s ( 14) being such that in one rotation direction they operate as a motor and pump, respectively, and in the other rotation direction they operate as a PM-generator and hydraulic motor, respectively.

4. Power supply according to claim 1 or claim 3,
characterised by
the hydraulic circuit's including a storage tank between the hydraulic pump (14) and the control valve (15), the storage tank being arranged to be pressurised during periods of low flow from the hydraulic pump and/or using braking or potential energy from the operating device or devices (16).