Multiple-winding high-voltage motor drive control system having complete redundant backup function

Abstract

The invention discloses a multiple-winding high-voltage motor drive control system having a complete redundant backup function. The multiple-winding high-voltage motor drive control system is characterized in that the control system comprises a centralized control device unit, an Ethernet switch unit and a high-voltage frequency converter unit, wherein the centralized control device unit is connected with the Ethernet switch unit, a master control unit of each high-voltage frequency converter in the high-voltage frequency converter unit is also connected to the Ethernet switch unit, the power unit output of each high-voltage frequency converter is connected to one winding of multiple-winding high-voltage motors respectively, and rotation speed sensors of the motors are connected to the centralized control device unit. A mature vector control technology is adopted for motor control, a rotation speed regulator and a magnetic flow regulator are controlled by the centralized control device unit, and a current regulator is controlled by the master control unit of each frequency converter. The multiple-winding high-voltage motor drive control system is low in cost, can be suitable for the multiple-winding motors different in winding number, has the complete redundant backup function and expands the application range of the high-voltage frequency converters, and the reliability and expandability of the system are improved.

Description

technical field [0001] The invention relates to a multi-winding high-voltage motor drive control system, in particular to a multi-winding high-voltage motor drive control system with a fully redundant backup function, belonging to the field of power electronic control systems. Background technique [0002] In recent years, the development of high-power electronic devices and high-performance, low-cost microprocessors and the development of modern AC motor control technology have greatly promoted the rapid development of AC speed regulation. The limitation of rated voltage and rated current of power electronic devices makes the application of multi-winding AC motors arise, because it can realize small power devices to drive high-power motors. A multi-winding motor is also called a multi-phase motor (the number of phases is three times the number of windings, such as a 2-winding motor is also called a 6-phase motor, and a 4-winding motor is also called a 12-phase motor). Mult...

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Problems solved by technology

[0003] At present, there are few introductions to the variable frequency drive system of multi-winding high-voltage AC motors. Most of the known literature and existing technologies are researched on motors with specific winding numbers. Starting from the mathematical model of multi-phase motors with specific winding numbers, their vector control Theoretical research on the algorithm, the control method is complicated, and it is not fully compatible with the mature vector control based on single-winding motors. When the number of motor windings is different, it cannot be fully applicable and does not have scalability. For multi-winding motors that can be used in different windings There are no relevant literature introductions and product reports for drive control technology

Regarding the research on the redundant backup technology when the inverters are driven in parallel, the current technology is based on the concept of master-slave control. In the parallel inverters, there is one inverter as the master. When the slave fails, the master will not be affected, but when the master fails, it still needs to All shutdowns, complete redundancy backup cannot be realized, and there is no relevant report on the drive control technology of multi-winding high-voltage AC motors with complete redundancy backup function

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