Shovel
First Claim
1. A shovel comprising:
- a hydraulic pump;
a motor generator that configured to drive the hydraulic pump;
a power storage system;
a swiveling motor performing a swiveling operation by electric power; and
a control device,wherein when the power storage system is stopped, the control device supplies regenerative electric power generated during deceleration of the swiveling motor to the motor generator.
1 Assignment
0 Petitions
Accused Products
Abstract
A shovel according to an embodiment of the present invention includes an engine; a motor generator that functions as a motor that uses a drive force of the engine and functions as a motor capable of assisting the engine; a power storage system, a swiveling motor; a DC bus that connects the motor generator, the power storage system, and the swiveling motor; and a controller that controls movements of the motor generator, the power storage system, and the swiveling motor. In a case where the power storage system is stopped, the controller supplies electric power of the motor generator that functions as the power generator to the swiveling motor when the swiveling motor is in a power running operation, and supplies regenerative electric power of the swiveling motor to the motor generator that functions as the motor when the swiveling motor is in a regenerative operation.
-
Citations
8 Claims
-
1. A shovel comprising:
-
a hydraulic pump; a motor generator that configured to drive the hydraulic pump; a power storage system; a swiveling motor performing a swiveling operation by electric power; and a control device, wherein when the power storage system is stopped, the control device supplies regenerative electric power generated during deceleration of the swiveling motor to the motor generator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification