Rotatingly driving device of construction machinery

• US 20050237021A1
• Filed: 04/23/2003
• Published: 10/27/2005
• Est. Priority Date: 05/13/2002
• Status: Abandoned Application

• Current Assignee: Klaus Schmidt, Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Original Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Inventors: Uejima, Mamoru, Inoue, Koji, Yoshimatsu, Hideaki, Sugano, Naoki
• Application Number:
  US10/512,088
• Publication Number:
  US 20050237021A1
• Time in Patent Office: Days
• US Class Current: 318/610
• CPC Class Codes: E02F 9/123 Drives or control devices specially adapted therefor E02F9/125 and E02F9/128 take precedence
• CPC Class Codes: E02F 9/128 Braking systems
• CPC Class Codes: E02F 9/2221 Control of flow rate; Load sensing arrangements E02F9/2203 take precedence over E02F9/2221
• CPC Class Codes: H02P 23/16 Controlling the angular speed of one shaft H02P23/18 takes precedence

Abstract

In a construction machine comprising an electric motor 6 for driving a rotational system, an operating member for instructing an operation of the electric motor 6, and a controller 9 for controlling the electric motor 6 according to an operation command from the operating member, the controller 9 has an emulation model 9a for simulating dynamic characteristics of a hydraulic rotation driving device in real time, and a target value for control is calculated from the emulation model 9a according to the operation command from the operating member to control the electric motor 6. Accordingly, the electric motor can mildly respond to the operation of a lever in an intermediate range and swiftly respond to a quick operation of the lever.

Claims

1. A rotation driving device for a construction machine comprising an electric motor for driving a rotational system of said construction machine, an operating member for instructing an operation of said electric motor, and a controller for controlling said electric motor according to an operation command from said operating member,

wherein said controller has an emulation model for simulating dynamic characteristics of a hydraulic rotational driving device in real time, and a target value for control is calculated by use of said emulation model according to the operation command from said operating member to control said electric motor.

2. The rotation driving device for the construction machine according to claim 1, wherein said emulation model individually has specifications of a hydraulic pump, a hydraulic actuator and various valves as hydraulic equipment.

3. The rotation driving device for the construction machine according to claim 2, wherein an input unit is connected to said controller, so that each of said specifications in said emulation model is changed through said input unit.

4. The rotation driving device for the construction machine according to claim 2, wherein said emulation model has nonlinear characteristic of a flow control valve or pressure control valve as said valve.

5. The rotation driving device for the construction machine according to claim 1, wherein either one or two or more of an external power source, a built-in battery, a generator driven by an engine and a capacitor are selected as a power source of said electric motor.

6. The rotation driving device for the construction machine according to claim 1, wherein said rotational system includes at least one of a rotating system having a rotating motor as driving source, a hoisting system with a winch motor as driving source, and a traveling system with a traveling motor as driving source.