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High-voltage frequency converter and control method thereof

A high-voltage inverter and control method technology, applied in control systems, AC motor control, electrical components, etc., can solve problems such as synchronization deviation, and achieve the effects of shortening the total length, improving the degree of conformity, and reducing the synchronization error.

Active Publication Date: 2022-05-10
霸州市宏伟机械有限公司
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Problems solved by technology

However, due to the inevitable signal transmission delay and signal processing speed deviation between different frequency converters, the synchronization deviation caused by signal transmission delay and signal processing speed deviation cannot be overcome.

Method used

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  • High-voltage frequency converter and control method thereof

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specific Embodiment approach

[0031] refer to figure 1 , a specific embodiment of the present invention includes,

[0032] Several rotational speed sensors 1 correspond to the motor under test one by one, and are used to detect the real-time rotational speed of the motor under test;

[0033] Several current sensors 2 correspond to the motor under test one by one, and are used to detect the real-time working current of the motor under test;

[0034] A first processor 3, communicated with all the rotational speed sensors 1 and the current sensors 2, for calculating and generating a primary modulation signal;

[0035] A plurality of second processors 4 correspond to the motor under test one by one, and communicate with the corresponding speed sensor 1, current sensor 2 and first processor 3 for calculating and generating a secondary modulation signal;

[0036] Several signal synchronous sending units 5 correspond one-to-one to the second processor 4, and different signal synchronous sending units 5 are conn...

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Abstract

The high-voltage frequency converter comprises a plurality of rotating speed sensors which are in one-to-one correspondence with tested motors and are used for detecting the real-time rotating speeds of the tested motors; a plurality of current sensors which are in one-to-one correspondence with the tested motors and are used for detecting the real-time working current of the tested motors; the first processor is in communication connection with all the rotating speed sensors and the current sensors and is used for calculating and generating a primary modulation signal; the plurality of second processors are in one-to-one correspondence with the tested motors, are in communication connection with the corresponding rotating speed sensors, the current sensors and the first processor, and are used for calculating and generating secondary modulation signals; and the plurality of signal synchronous sending units are in one-to-one correspondence with the second processors, and different signal synchronous sending units are in communication connection and are used for synchronously sending the secondary modulation signals to the corresponding tested motors. The defects in the prior art can be overcome, and the synchronism of the high-voltage frequency converter control system is further improved.

Description

technical field [0001] The invention relates to the technical field of frequency converter control, in particular to a high-voltage frequency converter and a control method thereof. Background technique [0002] The frequency converter is a device used to control the running state of the motor, and is widely used in various industrial and mining production sites. In large-scale system control, the coordinated control between different frequency converters is particularly important. In the prior art, Chinese invention patent 201911063357.3 discloses a master-slave control method for high-voltage inverters, which improves the control synchronization between different motors. However, due to the inevitable signal transmission delay and signal processing speed deviation between different frequency converters, the synchronization deviation caused by the signal transmission delay and signal processing speed deviation cannot be overcome. Contents of the invention [0003] The t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/04
CPCH02P27/04
Inventor 刘树马王秋安刘景林
Owner 霸州市宏伟机械有限公司
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