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Variable frequency speed regulation control device and variable frequency speed regulation control method for flotation machine

A frequency conversion speed regulation and control device technology, applied in the direction of single motor speed/torque control, AC motor control, control system, etc., to achieve energy saving, good power saving effect, and high efficiency

Inactive Publication Date: 2012-08-01
武汉长海电气科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a word, there are disadvantages in the flotation machine of the prior art: first, the asynchronous motor drives the stirring shaft through the belt pulley, it is difficult to adjust the speed of the stirring shaft quickly and on-site at any time according to the properties of different ore pulps, and improve the sorting index, while the existing method of directly driving the stirring shaft The technology does not have a technical solution for effective control devices and methods; two, due to the above-mentioned shortcomings, it is difficult for the flotation machine of the prior art to achieve the most economical speed by adjusting the output current under the condition of no material and light load, so as to realize energy saving function of

Method used

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  • Variable frequency speed regulation control device and variable frequency speed regulation control method for flotation machine
  • Variable frequency speed regulation control device and variable frequency speed regulation control method for flotation machine
  • Variable frequency speed regulation control device and variable frequency speed regulation control method for flotation machine

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Experimental program
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Effect test

Embodiment 1

[0026] like figure 1 , 2 Shown is an embodiment of the flotation machine frequency conversion speed regulation control device, which has a rectifier circuit 1, a filter circuit 2, an inverter circuit 3, a control circuit 4, a sensor 5, a power analyzer 6 and a man-machine interface 7; The rectifier circuit 1 described above is connected with the inverter circuit 3 through the filter circuit 2; the permanent magnet motor M is connected with the inverter circuit 3; the control circuit 4 is connected with the permanent magnet motor M through the sensor 5; the control circuit 4 is also connected with the inverter circuit 3 and The man-machine interface 7 is connected; the power analyzer 6 is connected with the rectifier circuit 1 . The rectifier circuit 1 is composed of a diode bridge circuit, which is powered by a three-phase 380V AC power supply and performs full-wave rectification on the three-phase AC power supply. The filter circuit 2 is an LC filter circuit, which converts...

Embodiment 2

[0028] In order to solve and improve the electromagnetic interference and dust-proof problems, the frequency conversion speed regulation control device of the present invention has made further improvements on the basis of the above-mentioned embodiment 1:

[0029] 1. The analog signal of the device is processed by an amplifier with a high common-mode rejection ratio, and filtered by a low-pass filter circuit; the switching signal of the device is isolated by photoelectric coupling, and filtered by a low-pass filter circuit.

[0030] 2. In order to protect the device from the invasion of the surge, a surge absorber-transient voltage suppressor is connected to the power input terminal in parallel, and the power line adopts a high-quality passive filter to block the interference signal in the device to the greatest extent. of the exterior.

[0031] 3. The signal transmission cable of the device should be shielded twisted pair, and the shielding layer should be grounded at one en...

Embodiment 3

[0035] like figure 1 , 2 Shown, carry out the frequency conversion speed regulation control method with the flotation machine frequency conversion speed regulation control device of the present invention, the steps are as follows:

[0036] A. Set the speed: set the speed of the permanent magnet motor M by the man-machine interface 7, and send it to the MCU processor 4.4 through the RS485 communication interface 4.6;

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Abstract

The invention relates to a variable frequency speed regulation control device and a variable frequency speed regulation control method for a flotation machine. The device comprises a rectification circuit, a filtering circuit, an inversion circuit, a control circuit, a sensor, an electric quantity analyzer and a human-computer interface, wherein the rectification circuit is connected with the inverter circuit through the filtering circuit; the permanent magnet motor M is connected with the inversion circuit; the control circuit is connected with the permanent magnet motor M through the sensor, and is also connected with the inversion circuit and the human-computer interface ; and the electric quantity analyzer is connected with the rectification circuit. The control method comprises the following steps of: setting rotating speed, detecting a position signal, detecting a current signal, regulating the rotating speed and performing failure alarming and processing. The device and the method have the advantages that: the permanent magnet direct drive motor of the flotation machine is controlled to be randomly regulated within a rotating speed range, and optimal flotation rotating speed can be conveniently set according to actual conditions by a user; and the most power-saving economical rotating speed of the device can be realized by regulating output current under a material-free light-load working condition, and remarkable energy-saving effects can be achieved.

Description

[0001] technical field [0002] The invention relates to a frequency conversion speed regulation control device and a frequency conversion speed regulation control method for a flotation machine, and belongs to the technical field of power electronic control of mineral processing equipment. Background technique [0003] The flotation drive equipment used in the prior art flotation machine is an AC asynchronous motor, and the motor drives the stirring shaft through a pulley reduction system to perform flotation operations. Usually, the belt pulley needs to be disassembled and adjusted for each speed setting, which is very inconvenient for on-site debugging; there is also a device that does not use the belt pulley deceleration system to drive the stirring shaft for flotation, but lacks frequency conversion speed control technology. In a word, there are disadvantages in the flotation machine of the prior art: first, the asynchronous motor drives the stirring shaft through the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02P27/06
Inventor 包涌泉邓为邹伟华龙文枫杨华
Owner 武汉长海电气科技开发有限公司
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