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Electromobile driving system vector control method using double inverters

A dual-inverter, vector control technology, applied in vector control systems, motor generator control, electronic commutation motor control, etc., can solve the problem of high cost

Inactive Publication Date: 2015-07-01
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Powering a dual-inverter system with two isolated DC voltage sources is cost-prohibitive, while using a single DC voltage source to power a dual-inverter system has problems with zero-sequence current and common-mode voltage

Method used

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  • Electromobile driving system vector control method using double inverters
  • Electromobile driving system vector control method using double inverters
  • Electromobile driving system vector control method using double inverters

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Embodiment Construction

[0055] Attached below figure 2 to attach Figure 10 , and the Examples describe the present invention in detail, and the objects and effects of the present invention will become more apparent.

[0056] like figure 1 As shown, an open-winding permanent magnet synchronous motor double-inverter drive system includes a first inverter 1 , a second inverter 2 , an open-winding permanent magnet synchronous motor 3 , and a DC voltage source 4 . The double inverter is composed of the first inverter 1 and the second inverter 2 powered by the same DC voltage source, the first inverter 1 and the second inverter 2 are respectively connected with the open-winding permanent magnet synchronous motor 3 The stator windings are connected at both ends.

[0057] figure 2 It is a structural block diagram of the vector control method of the electric vehicle drive system using double inverters of the present invention. According to the collected three-phase current signal i of the permanent ma...

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Abstract

The invention discloses an electromobile driving system vector control method using double inverters. The electromobile driving system vector control method includes the following steps: collecting three-phase stator current, rotor position and rotating speed in an unwinding permanent magnetic synchronous motor, wherein the three-phase current is subjected to 3S / 2R conversion to acquire current under a two-phase rotating coordinate system. A system adopts the vector control method with id equal to 0, a stator voltage instruction under the two-phase rotating coordinate system is acquired through double closed-ring control of a rotating speed outer ring and a current inner ring, stator voltage under the two-phase static coordinate system is acquired through 2R / 2S coordinate conversion, control pulse of the double inverters is acquired through a single-power-source double-inverter SVPWM (space vector pulse width modulation) module, and switch devices of the double inverters are triggered to realize vector control of double-inverter SVPWM of the unwinding permanent magnetic synchronous motor. The electromobile driving system vector control method has the advantages that the unwinding permanent magnetic synchronous motor is quick to start, high in overload capability and good in speed adjusting performance; due to the single-power-source double-inverter SVPWM, voltage level of the system is increased, and safety and reliability of the system are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor control, in particular to a control method for an electric vehicle drive system using double inverters. Background technique [0002] In recent years, open-winding AC motor drive systems based on dual-inverter topologies have received great attention. Permanent magnet motors have the advantages of high power density and high efficiency. The increased winding port of the open-winding structure makes the control of the motor drive system more flexible, and the circuit topology is especially suitable for fault-tolerant control. Combined with high-performance control algorithms, the uninterrupted operation of the drive system can be realized to avoid accidents and disasters. The double-inverter structure with open windings can reduce the harmonic content of the output voltage and increase the output voltage level at a lower switching frequency, which effectively solves the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14
Inventor 时斌朱海勇张加岭吴雨薇王克元王森
Owner SOUTHEAST UNIV
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