US 11,916,433 B2
Method for managing the electric power supply of a crane from a primary source and from a rechargeable secondary source
Bruno Roni-Damond, Lyons (FR); and Vincent Veillerot, Tassin la Demi Lune (FR)
Assigned to MANITOWOC CRANE GROUP FRANCE, Dardilly (FR)
Filed by MANITOWOC CRANE GROUP FRANCE, Dardilly (FR)
Filed on Mar. 10, 2022, as Appl. No. 17/692,120.
Claims priority of application No. 21/02360 (FR), filed on Mar. 10, 2021.
Prior Publication US 2022/0294260 A1, Sep. 15, 2022
Int. Cl. H02J 9/06 (2006.01); H02J 7/00 (2006.01); B66C 13/18 (2006.01); H02J 7/02 (2016.01); B66C 13/12 (2006.01)
CPC H02J 9/062 (2013.01) [B66C 13/12 (2013.01); B66C 13/18 (2013.01); H02J 7/0048 (2020.01); H02J 7/0063 (2013.01); H02J 7/0068 (2013.01); H02J 7/02 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A management method for managing electrical power supply for electrically powering electrical equipment of a crane, via a conversion circuit, from a primary power supply source capable of providing a primary power and from a rechargeable secondary power supply source capable of providing a secondary power, wherein said management method comprises a monitoring of a requested general power which corresponds to a power requested by all the electrical equipment and a monitoring of a charge level of the rechargeable secondary power supply source, and
wherein the management method implements, depending on said requested general power and said charge level, at least the following management modes:
a recharging mode in which the requested general power is zero and the primary power supply source is available and connected to the rechargeable secondary power supply source to recharge it according to its charge level;
a mixed recharging/powering mode in which the requested general power is non-zero, and the primary power supply source is available and connected, on the one hand, to the electrical equipment to electrically power them and, on the other hand, to the rechargeable secondary power supply source to recharge it depending on the charge level;
a main power supply mode in which the requested general power is non-zero, and only the primary power supply source is connected to the electrical equipment to electrically power them;
a hybrid power supply mode in which the requested general power is non-zero, and the primary power supply source and the rechargeable secondary power supply source are both connected to the electrical equipment to electrically power them; and
an autonomous power supply mode in which the requested general power is non-zero, and only the rechargeable secondary power supply source is connected to the electrical equipment to electrically power them according to the charge level;
wherein the electrical equipment are powered by an available maximum power which corresponds to a minimum between a maximum conversion power and a source power, wherein the maximum conversion power corresponds to a maximum power that can be delivered at the output of the conversion circuit and wherein the source power corresponds to:
the sum of the secondary power and of the primary power in the hybrid power supply mode;
the secondary power in the autonomous power supply mode;
the primary power in the main power supply mode; and
the primary power minus a recharging power used to recharge the rechargeable secondary power supply source in the mixed recharging/powering mode;
wherein the management method implements, in the autonomous power supply mode and in the hybrid power supply mode, an adaptation of the secondary power as a function at least of the charge level, said secondary power being lower than or equal to a secondary maximum power which corresponds to a maximum power that can be delivered by the rechargeable secondary power supply source,
wherein the management method implements a selection, in the hybrid power supply mode and in the autonomous power supply mode, of a management sub-mode amongst several management sub-modes comprising at least:
an automatic sub-mode in which the secondary power is monitored so as to correspond to ka times the secondary maximum power, wherein ka is a coefficient that is less than or equal to 1 and which decreases with the charge level until the charge level drops below a low threshold; and
an economical sub-mode in which the secondary power is monitored so as to correspond to ke times the secondary maximum power, wherein ke is a coefficient lower than ka and which decreases with the charge level until the charge level drops below a low threshold.