Control device for gearbox

Abstract

A control device for a gearbox which includes a mechanical pump and an electric pump, the mechanical pump having a first-stage displacement and a second-stage displacement, and the first-stage displacement being less than the second-stage displacement. The control device includes a sensor module for detecting an input speed of a wind wheel, and an oil temperature. The control device further includes a mechanical pump control module configured to, when the input speed is greater than or equal to a speed threshold and the oil temperature is above an oil temperature threshold, control the mechanical pump to operate at the first-stage displacement, and when the input speed is less than the speed threshold and the oil temperature is below the oil temperature threshold, control the mechanical pump to operate at the second-stage displacement.

Dependencies are inferred from the claim text.