Patent ID: 8584808
Filing Date: 2013-11-19
Classification: B66B

Abstract:
1. A method of control implemented in a variable speed drive for controlling a lifting load, the control of the load being carried out according to a first control profile which comprises: acceleration of the load with a view to reaching a first speed in accordance with a first non-linear acceleration ramp; deceleration of the load subsequent to receipt of a deceleration order; and stopping of the load; wherein when the load receives the deceleration order while it is at a current speed below the first speed, the method further comprises: determining a second speed below the first speed and above the current speed, the second speed having an optimal value so as to minimize a travel time of the load until stopping; and generating and applying a second control profile replacing the first control profile and comprising accelerating the load until reaching the second speed according to a second non-linear acceleration ramp taking account a remaining distance to be traveled, followed by a deceleration and by a stopping.