Patent ID: 9347305
Filing Date: 2016-05-24
CPC Classification: E21B

Claim Text:
1. Method for controlling a power source at a rock drilling apparatus, said power source being arranged to drive at least a first load at the rock drilling apparatus, wherein said first load in operation, provides power to a first consumer, and where the power that can be delivered by said first load depends on the rotation speed of the power source, the method including: by means of a representation of said first consumer, determining a power demand of said first consumer, based on said determined power demand, determining a rotation speed demand of said first load, wherein, when determining a rotation speed demand of said first load based on a determined power demand, a determined relation between the rotation speed of the power source and the power that can be delivered by said first load is used, and controlling the rotation speed of said power source based at least on said determined rotation speed demand of said first load.