Patent ID: 7578761

Claim:
A hydraulic circuit control device that selectively supplies oil to a first oil passage that requires a high pressure and a second oil passage that requires a low pressure and high flow rate by an oil pump driven by an electric motor, the control device comprising: an oil passage switching unit adapted to connect the oil pump to either the first oil passage or the second oil passage; a control mode switching unit adapted to switch the control mode of the electric motor to either a torque control mode or a speed control mode; an oil passage selecting unit adapted to select whether to connect the oil pump to the first oil passage or the second oil passage; and a control unit adapted to perform control so that the control mode switching unit switches the control mode of the electric motor to the torque control mode when the oil passage selecting unit has selected the first oil passage, and to perform control so that the control mode switching unit switches the control mode of the electric motor to the speed control mode when the oil passage selecting unit has selected the second oil passage.