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Single-phase winding open circuit fault tolerance driving system and control method of open winding permanent magnet synchronous motor

A permanent magnet synchronous motor and drive system technology, which is applied in the direction of motor generator control, AC motor control, electronic commutation motor control, etc., can solve problems such as torque oscillation and stator coils cannot form a circular rotating magnetic field, and achieve reduction Small pulsation, eliminate dead zone effect, eliminate interference effect

Inactive Publication Date: 2016-06-29
SOUTHEAST UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that in the prior art, the stator coil cannot form a circular rotating magnetic field after the single-phase winding of the open-winding three-phase permanent magnet synchronous motor is opened, and the torque oscillates

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  • Single-phase winding open circuit fault tolerance driving system and control method of open winding permanent magnet synchronous motor
  • Single-phase winding open circuit fault tolerance driving system and control method of open winding permanent magnet synchronous motor
  • Single-phase winding open circuit fault tolerance driving system and control method of open winding permanent magnet synchronous motor

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Embodiment Construction

[0016] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0017] Such as figure 1 As shown, the present invention includes a DC voltage source, two two-level voltage inverters and a three-phase permanent magnet synchronous motor; the DC voltage source supplies power to the system; The two ends of the stator winding are respectively connected to a standard two-level voltage type inverter; two two-level voltage type inverters form a dual-inverter system; the dual-inverter system utilizes the remaining two-phase The switch synthesizes two-phase switch vectors, and the drive system adopts the control strategy of voltage space vector pulse width modulation to generate 16 switch states, and there are eight basic vectors V 1 ~V 8 and a zero vector V 0 .

[0018] The working principle is: the neutral point of the three-phase permanent magnet synchronous motor is disassembled, and the two ends of the st...

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Abstract

The invention discloses an open-winding permanent magnet synchronous motor drive system and a single-phase winding open-circuit fault-tolerant control method thereof. The drive system includes a single DC voltage source, two sets of inverters, a three-phase permanent magnet synchronous motor, and a two-phase switch vector ; After the neutral point of the stator winding of the three-phase permanent magnet synchronous motor is disassembled, the first and last sections are connected to two standard two-level voltage inverters. When an open circuit fault occurs in a certain phase winding, the switch of the faulty phase is immediately blocked online to eliminate Disturbance of a faulty phase winding on a fault-tolerant drive system. The present invention makes full use of the open-winding permanent magnet synchronous motor topology structure with many switch vectors and is easy to realize fault-tolerant control on the basis of not increasing the hardware circuit, and uses the switch vector modulation of the remaining two phases to maintain the circular rotating magnetic field of the motor , using seven-stage Dual‑H bridge modulation to eliminate the influence of the dead zone effect, greatly reduce the pulsation of the output torque, and ensure stable torque output.

Description

technical field [0001] The invention relates to an open-circuit fault-tolerant driving system of an open-winding permanent magnet synchronous motor and a control method thereof. Background technique [0002] Compared with other three-level topologies, the open-winding dual-inverter topology reduces the number of switching devices. At the same time, on the basis of maintaining the output three-level voltage, there is a redundant vector of switching devices, and its fault tolerance is greatly enhanced compared with the traditional single inverter structure. Due to its own advantages, the open-winding dual-inverter topology is very suitable for high-demand drive systems such as aerospace and electric vehicles. In these occasions, the reliability and fault tolerance of the system are very important indicators. However, in the prior art, the stator coil cannot form a circular rotating magnetic field after the single-phase winding of the open-winding three-phase permanent magnet ...

Claims

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Application Information

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IPC IPC(8): H02P21/16H02P27/12
CPCH02P27/12
Inventor 樊英方洁周晓飞
Owner SOUTHEAST UNIV
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