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Vector control circuit of high-performance transducer and its control method

A vector control and current control circuit technology, applied in the field of frequency converters, can solve the problems of poor dynamic characteristics, inability to meet the requirements of high precision, high response speed, and high energy saving, achieve good energy saving effect, ensure speed regulation accuracy, and ensure fast speed effect of response

Inactive Publication Date: 2006-09-06
上海山宇电子设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Frequency converters based on this technology are used to drive loads such as fans, water pumps, and compressors, and have a certain energy-saving effect, but their dynamic characteristics are poor, and they cannot meet the requirements of high precision, high response speed, and high energy saving, such as CNC machine tool spindle frequency converters.

Method used

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  • Vector control circuit of high-performance transducer and its control method
  • Vector control circuit of high-performance transducer and its control method
  • Vector control circuit of high-performance transducer and its control method

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Embodiment Construction

[0028] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0029] Depend on figure 1 , figure 2 It can be seen that the control circuit of the present invention includes: an uncontrollable rectifier, an intermediate DC link, a current control circuit, a current detection circuit, and a speed detection circuit; type PWM inverter; a microprocessor connected with the current control circuit, the current detection circuit and the speed detection circuit;

[0030] The current-controlled PWM inverter includes (taking one phase as an example): stator current given value i * , compared with the actual current i, sampled and held by the D flip-flop as the driving signal of the IGBT power element; when the given value i * When it is greater than the actual value i, the upper bridge arm is turned on and the lower bridge arm is blocked, so that the actual current of the motor increases; otherwise, when i * Whe...

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Abstract

The present invention relates to a high performance frequency converter vector control circuit and control method. It contains uncontrollable rectifier, intermediate dc link, current control circuit, and current detecting circuit, speed detecting circuit, current controlling type PWM inverter, and microprocessor. The present invention has advantages of through fast regulating current regulator to ensure systematical quick-response, through current regulator and speed governor double fed control to ensure systematical speed regulation precision an to realize preferable energy-saving effect.

Description

technical field [0001] The invention relates to a frequency converter, in particular to a control circuit and a control method for realizing speed regulation precision and response speed in the frequency converter. Background technique [0002] Frequency conversion speed regulator is a new type of speed regulating device, which has been widely used in all walks of life. Its good speed regulation performance and remarkable energy-saving effect have been fully reflected in industries such as iron and steel, mining, petrochemical, electric power, machinery, light industry, and building materials. [0003] At present, most frequency conversion technologies adopt open-loop V / F control, including: constant torque speed regulation and constant power speed regulation. Frequency converters based on this technology are used to drive loads such as fans, water pumps, and compressors, and have a certain energy-saving effect, but their dynamic characteristics are poor, and they cannot me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/451H02P21/00H02P27/04
Inventor 黄景春
Owner 上海山宇电子设备有限公司