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Predictive current control method of semi-centralized open-winding permanent magnet synchronous motor system

A permanent magnet synchronous motor and current prediction technology, which is applied in the direction of current controller, motor generator control, AC motor control, etc., can solve the problems of raising cost, large volume, unfavorable predictive current control, etc., and achieve the goal of steady-state performance improvement Effect

Pending Publication Date: 2022-07-29
SOUTHEAST UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0002] In a driving system composed of n motors, the traditional open-winding permanent magnet synchronous motor will require 2n inverters, which will take up a huge volume and increase the cost. By making one side of these motors share a multiplexed inverter Inverters reduce the number of required inverters to n+1, but these inverters belong to the same control system, which will increase the number of voltage vectors exponentially, which is not conducive to the use of predictive current control

Method used

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  • Predictive current control method of semi-centralized open-winding permanent magnet synchronous motor system
  • Predictive current control method of semi-centralized open-winding permanent magnet synchronous motor system
  • Predictive current control method of semi-centralized open-winding permanent magnet synchronous motor system

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[0014] Attached below figure 1 Describe the technical solution of the present invention in detail;

[0015] as attached figure 1 As shown, a three-vector predictive current control method for a semi-centralized open-winding permanent magnet synchronous motor system disclosed in an embodiment of the present invention is characterized in that: the system includes two three-phase open-winding permanent magnet synchronous motors, three Two-level voltage source inverter and predictive current control unit. The three inverters are connected by a common DC bus. Each open-winding motor needs to supply power from the left and right ends at the same time. The two motors are called Motor No. 1 and motor No. 2, the left end of motor No. 1 and the right end of motor No. 2 each use an independent inverter, while the right end of motor No. 1 and the left end of motor No. 2 share a multiplexing inverter, The respective independent inverters are called No. 1 inverter and No. 2 inverter, and ...

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Abstract

The invention discloses a three-vector predictive current control method for a semi-centralized open-winding permanent magnet synchronous motor system, and belongs to the technical field of motor driving and control, and the system is composed of two open-winding three-phase permanent magnet synchronous motors with a common DC bus, three two-level inverters and a predictive current control unit. Sampling the direct current bus voltage Udc, three-phase current ia1 (k), ib1 (k), ic1 (k), ia2 (k), ib2 (k) and ic2 (k) of the two permanent magnet synchronous motors, rotor position angles theta m1 (k) and theta m2 (k), and mechanical rotation angular velocities omega m1 (k) and omega m2 (k); predicting the current id1 (k + 1), the current iq1 (k + 1), the current i01 (k + 1), the current id2 (k + 1), the current iq2 (k + 1) and the current i02 (k + 1) in the next state; calculating a k + 1 state voltage reference value according to a dead-beat principle; a phase voltage vector-based two-dimensional plane space is constructed to quickly confirm a sector and calculate the duration of two adjacent basic effective phase voltage vectors and a zero-phase voltage vector, so that no-difference output of a reference phase voltage vector in a modulation degree range is realized, and the steady-state performance of the system is improved.

Description

technical field [0001] The invention relates to a three-vector predictive current control method of a semi-centralized open-winding permanent magnet synchronous motor system, which belongs to the technical field of motor drive and control. Background technique [0002] In the drive system composed of n motors, the traditional open-winding permanent magnet synchronous motor will require 2n inverters, which will occupy a huge volume and increase the cost. By making one side of these motors share a multiplexed inverter The number of inverters required is reduced to n+1 units, but these inverters belong to the same control system, which will increase the number of voltage vectors exponentially, which is not conducive to the use of predictive current control. SUMMARY OF THE INVENTION [0003] Purpose of the invention: The present invention proposes a three-vector predictive current control system based on a semi-centralized open-winding permanent magnet synchronous motor system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/28H02P21/14H02P21/22H02P25/022
CPCH02P6/28H02P21/14H02P21/22H02P25/022H02P2207/05
Inventor 王伟蒋奕昕
Owner SOUTHEAST UNIV
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