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Motor control system for a hoist drive

一种控制系统、电动机的技术，应用在交流电动机控制、控制系统、单个电动机转速/转矩控制等方向，能够解决负载重量传感器昂贵等问题

Active Publication Date: 2012-09-05
KONECRANES GLOBAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A motor control system for a crane drive in the prior art is adapted to use load weight data obtained from a load weight sensor in order to limit the rotational speed of the motor of the crane drive
Load weight sensors suitable for outputting load weight data are relatively expensive components

Method used

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  • Motor control system for a hoist drive
  • Motor control system for a hoist drive
  • Motor control system for a hoist drive

Examples

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Embodiment Construction

[0012] figure 1 An open loop crane drive is shown comprising an electric motor 2 operatively connected to a lifting member 4 for lifting a load 6 . The electric motor 2 is controlled by a motor control system according to an embodiment of the present invention. The motor control system comprises power limiter means 8 , saturation means 12 , rate limiter means 14 , control means 16 , power estimator means 18 and pulse width modulation means 20 . The motor control system is adapted to generate a final angular frequency reference ω for controlling the motor 2 based on the initial data ＊ s , the initial data includes a constrained setpoint value ω for the angular frequency reference ＊ s,lim and the correction term ω for the angular frequency reference s，cor . exist figure 1 In the open-loop embodiment of , the final angular frequency reference ω ＊ s is the synchronous angular frequency reference, and the control device 16 is a scalar control device.

[0013] exist figur...

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Abstract

A motor control system for a hoist drive having an electric motor (2) operationally connected to a hoisting member (4) for hoisting a load (6), the motor control system being adapted to generate a final angular frequency reference ([omega]*s) for control of the electric motor (2), the motor control system comprising a power limiter means (8) adapted to generate a correction term ([omega]s, cor) for angular frequency reference. The power limiter means (8) comprises an integrating controller means (10), the power limiter means (8) being adapted to generate the correction term ([omega]s, cor) for angular frequency reference using output signal Ip of the integrating controller means (10), initial data of the integrating controller means (10) including information relating to actual value of the power of the electric motor (2) and a power related limit value of the electric motor (2).

Description

technical field [0001] The invention relates to a motor control system for a hoist drive according to the preamble of independent claim 1 . Background technique [0002] In order to maintain stable operation of the crane drive, the rotational speed of the electric motor of the crane drive must be limited such that the slip frequency does not exceed the pull-out slip frequency. In other words, the stall torque must not be achieved. Stall torque decreases as the inverse square of speed, so it is easier to achieve stall torque at high speeds than at low speeds. [0003] A prior art motor control system for a crane drive is adapted to use load weight data obtained from a load weight sensor in order to limit the rotational speed of the motor of the crane drive. Load weight sensors suitable for outputting load weight data are relatively expensive components. Contents of the invention [0004] It is an object of the present invention to provide a motor control system for a cra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02P23/08H02P25/02B66B1/30B66B11/04B66B15/08B66C13/22B66D3/20
CPCB66D1/46H02P23/0077H02P23/0004
Inventor J·萨洛迈基M·波玛
Owner KONECRANES GLOBAL
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