JP2010168166A5

JP2010168166A5 -

Info

Publication number: JP2010168166A5
Application number: JP2009012037A
Authority: JP
Filing date: 2009-01-22
Publication date: 2011-07-28
Anticipated expiration: 2029-01-22

Claims

An engine generator that generates AC power; a converter that converts the AC power into DC power; a drive inverter that drives the motor by converting the DC power into AC; the drive inverter and the engine generator A crane system comprising a controller for controlling the crane and a crane state detector for detecting the state of the suspended load,
The controller predicts the power consumption of the next operation using the operation state of the motor and the state of the suspended load,
A crane system that determines a rotational speed command of the engine generator based on the predicted power consumption.

The crane state detector detects a slack rope the suspended load is suspended,
The crane system according to claim 1, wherein the controller determines a rotational speed command of the engine generator based on a slackness of the rope when the motor is stopped.

The crane state detector detects whether the suspended load is in a grounded state,
The crane system according to claim 1 or 2, wherein the controller determines a rotational speed command of the engine generator according to a grounding condition of the suspended load when the motor is stopped.

The crane state detector detects whether the suspended load is suspended,
Wherein the controller is in the stop state of the motor, when the state of the suspended load is suspended, using a value of the torque command of the driving inverter deceleration stop operation immediately before the motor, the rotation of the engine generator The crane system according to any one of claims 1 to 3, wherein a number command is determined.

The controller calculates the position of the suspended load, and if the suspended load position is higher than a predetermined position when the motor is stopped, the rotation speed command of the engine generator is set to a predetermined speed. The crane system according to any one of claims 1 to 4 .

The crane state detector detects whether the suspended load is suspended,
Wherein the controller is in the stop state of the motor, when the state in which the suspended load is suspended has passed a predetermined time or more, characterized by turning off the main trunk signal capable of blocking the operation of the drive inverter The crane system according to any one of claims 1 to 5 .

Further comprising a system management unit that manages the load information of the suspended load,
The crane system according to any one of claims 1 to 6, wherein the controller determines a rotation speed command of the engine generator using load information of the suspended load from the system management unit. .

The crane system according to any one of claims 1 to 7, wherein the converter is a diode rectifier that converts AC power generated by the engine generator into DC power.

8. The converter according to claim 1, wherein the converter is a PWM converter that converts AC power generated by the engine generator into DC power and can control the DC power. 9. Crane system.

An engine generator that generates AC power, a drive inverter that drives a motor using the AC power as a power supply source, a controller that controls the drive inverter and the engine generator, and a crane that detects the state of a suspended load a method of controlling a crane system for determining the rotational speed command of engine generator with a state detector,
Determining whether or not the suspended load is suspended;
Performing a suspended load grounding determination of the suspended load;
Performing the slack determination of the suspended load;
Determining the hoisting position of the suspended load;
Determining the operating state of the motor;
Control method for a crane system for determining the rotational speed command features and to Rue engine generator that includes a.

In the step of performing an operation state determination of the motor, characterized by predicting the power consumption of the next operation of the motor, the control method of the crane system for determining the rotational speed command of the engine generator according to claim 10 .