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Method for improving drive precision and reliability of common DC motor by simple encoder

A technology of DC motor and encoder, applied in the direction of control using feedback, etc., to achieve the effect of cost reduction

Inactive Publication Date: 2011-10-26
北京应天阳光太阳能技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this is a characteristic of DC motors, generally low-cost DC motors are not used in positioning drives (such as sun tracking)

Method used

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  • Method for improving drive precision and reliability of common DC motor by simple encoder
  • Method for improving drive precision and reliability of common DC motor by simple encoder
  • Method for improving drive precision and reliability of common DC motor by simple encoder

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Experimental program
Comparison scheme
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Embodiment Construction

[0021] specific implementation plan

[0022] Combine below figure 1 , figure 2 , image 3 A further description of the method of improving the driving accuracy and reliability of ordinary DC motors with simple encoders:

[0023] figure 1 The power line or control line of the DC motor 1 in the circuit is connected to the controller 2, and the controller 2 determines whether the DC motor 1 starts or stops. The output shaft of the DC motor 1 is connected to the input end 12 of the reducer 8 . The output 15 of the reducer is connected to the mechanical load 7 . Figure 1 The reducer 8 in is a reducer with three reduction stages. The encoder 4 is installed on the rotating shaft 13 connecting the first-stage reduction 3 and the second-stage reduction 5 . The rotation angle of the rotating shaft 13 is θ, and the rotation angle of the output end is ρ. The output signal 11 of the encoder 4 is connected to the controller 2 through electric wires or data lines.

[0024] figur...

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Abstract

This invention relates to a method for improving drive precision and reliability of common DC motor by simple encoder. It aims to improve distinctly drive precision and reliability of the motor of drive gearbox with low-cost elements and realize the control ability similarly to the servo motor, and reduces greatly the cost on single or dual axis solar tracking device for more competitiveness. Wherein, arranging a simple coder on the rotary axis of one slowing-down input end in gear box of the track device to output signal to drive controller of the motor; using the controller to compute the angle and circulate number, and computing the on-off time with the MPU or CPU instead of the control by common servo motor, finally achieving the object of improvement of drive precision and reliability of drive system.

Description

technical field [0001] The present invention relates to DC motor drive and control for sun tracking devices. Its applications include small stand-alone and large-scale grid-connected photovoltaic power generation, solar thermal power generation and solar cookers. Background technique [0002] In high-efficiency, mainly concentrated solar energy harvesting applications, such as solar photovoltaic power generation, solar thermal power generation, and solar concentrated high-temperature furnaces, tracking devices using uniaxial, quasi-uniaxial or dual-axis are required. Germany's ZSW (29th IEEE Photovoltaic Experts Meeting, May 2002) has made long-term comparative experiments and measurements, and its conclusion points out that the annual power generation of a flat-panel photovoltaic cell with tracking is better than that of the same flat panel without tracking. Type photovoltaic cells (the normal line of the panel faces south, and the angle formed with the horizon is the loca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D3/12G05D3/18
Inventor 陈应天林晨星林文汉
Owner 北京应天阳光太阳能技术有限公司
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