Hydraulic load lifter with energy recovery system
First Claim
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1. A system for energy-efficient lifting and lowering a load, comprising:
- a lifting column comprising a frame with a movable carrier and a drive which acts on the carrier, wherein the drive comprises a power source for power supply to a motor;
a pump in an ascent mode driven by the motor and in a descent mode driving the motor as a generator for generating electrical energy from potential energy during the lowering of the load; and
motor control means for control of the motor, the motor control means arranged such that the power supply to the motor is manipulated for speed control of the carrier in at least the ascent mode.
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Abstract
Provided is a system, lifting column and method for the energy efficient lifting and lowering of a load, such as a vehicle. The system includes a lifting column having a frame with a movable carrier and a drive which acts on the carrier. The drive includes a power source for power supply to a motor, a pump in an ascent mode driven by the motor and in a decent mode driving the motor as a generator for energy-recovery, and motor control unit for control of the motor. The motor control unit is arranged such that the power supply of the motor is manipulated for speed control of the carrier in at least the ascent mode.
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Citations
13 Claims
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1. A system for energy-efficient lifting and lowering a load, comprising:
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a lifting column comprising a frame with a movable carrier and a drive which acts on the carrier, wherein the drive comprises a power source for power supply to a motor; a pump in an ascent mode driven by the motor and in a descent mode driving the motor as a generator for generating electrical energy from potential energy during the lowering of the load; and motor control means for control of the motor, the motor control means arranged such that the power supply to the motor is manipulated for speed control of the carrier in at least the ascent mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13)
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9. A lifting column, comprising:
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a frame with a movable carrier and a drive which acts on the carrier, wherein the drive comprises a power source for power supply to a motor; a pump in an ascent mode driven by the motor and in a descent mode driving the motor as a generator for generating electrical energy from potential energy during the lowering of a load; and motor control means for control of the motor, the motor control means arranged such that the power supply to the motor is manipulated for speed control of the carrier in at least an ascent mode.
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Specification