PI (proportional integral) controller amplitude limit control method and system and permanent magnet synchronous motor

A permanent magnet synchronous motor and control method technology, applied in control systems, control generators, vector control systems, etc., can solve problems such as system instability and sudden change in output current and torque, so as to avoid unstable operation and achieve smooth changes. Effect

Active Publication Date: 2018-07-06
GUANGDONG MEIZHI COMPRESSOR
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For permanent magnet synchronous motors, in order to achieve the best energy efficiency of the motor in the full frequency band, switch between the star connection state and the delta connection state of the winding is realized through the switching tube. The motor adopts the same vector control structure in the two winding connection states, but the control parameters need to be based on different Adjust the connection state of the winding, and the current loop speed loop PI adjustment limit value should also be changed accordingly. When the winding connection state changes, the output current torque may change suddenly due to the change of the limit value, which will lead to system instability.

Method used

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  • PI (proportional integral) controller amplitude limit control method and system and permanent magnet synchronous motor
  • PI (proportional integral) controller amplitude limit control method and system and permanent magnet synchronous motor
  • PI (proportional integral) controller amplitude limit control method and system and permanent magnet synchronous motor

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Embodiment Construction

[0053] In order to understand the above-mentioned aspects, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0054] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, therefore, the protection scope of the present invention is not limited to the specific details disclosed below. EXAMPLE LIMITATIONS.

[0055] In the embodiment of the first aspect of the present invention, a control method of a PI controller limit value is proposed, figure 1 A schematic flow chart showing a control method of a PI contro...

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Abstract

The invention provides a PI (proportional integral) controller amplitude limit control method and system, a permanent magnet synchronous motor, a computer device and a computer-readable storage medium, wherein the PI controller amplitude limit control method includes: upon the receipt of a winding conversion command, acquiring pre-conversion winding connection state and post-conversion winding connection state of the permanent magnet synchronous motor; using a reverse PI controller to perform amplitude limit adjustment according to the pre-conversion winding connection state and post-conversion winding connection state so that the amplitude limit changes gradiently. The reverse PI controller is used to perform amplitude limit adjustment so that the amplitude limit changes gradiently, and running instability of the permanent magnet synchronous motor and even crash due to sudden changes in current torque output caused by sudden changes in the amplitude limit can be avoided.

Description

technical field [0001] The present invention relates to the technical field of permanent magnet synchronous motors, in particular, to a method for controlling amplitude limiting values ​​of PI controllers, a control system for limiting values ​​of PI controllers, permanent magnet synchronous motors, computer equipment, and computer-readable storage media . Background technique [0002] For permanent magnet synchronous motors, in order to achieve the best energy efficiency of the motor in the full frequency band, switch between the star connection state and the delta connection state of the winding is realized through the switching tube. The motor adopts the same vector control structure in the two winding connection states, but the control parameters need to be based on different Adjust the connection state of the winding, and the PI adjustment limit value of the current loop speed loop should also be changed accordingly. When the winding connection state changes, the output...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/22H02P25/024H02P25/18H02P27/08
CPCH02P21/0003H02P21/22H02P25/024H02P25/184H02P27/08H02P2207/05
Inventor 刘超丛
Owner GUANGDONG MEIZHI COMPRESSOR
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