Space vector control method of fault tolerance system of permanent magnet synchronous motor (PMSM)

A permanent magnet synchronous motor, space vector control technology, applied in the field of power electronics, can solve the problems of open circuit fault, high failure rate of the power switch of the inverter, short circuit of the power switch, etc., to achieve the effect of strong practicability and versatility

Active Publication Date: 2018-09-25
WEIHAI CREDITFAN VENTILATOR
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the eight-switch inverter two-phase permanent magnet synchronous drive, the power switch failure rate of the inverter is high
In frequent use occasions, the system will often have power switch short circuit or open circuit faults, which restricts the promotion of two-phase motors

Method used

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  • Space vector control method of fault tolerance system of permanent magnet synchronous motor (PMSM)
  • Space vector control method of fault tolerance system of permanent magnet synchronous motor (PMSM)
  • Space vector control method of fault tolerance system of permanent magnet synchronous motor (PMSM)

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Embodiment Construction

[0049] The invention provides a two-phase permanent magnet synchronous motor fault-tolerant system, such as figure 1 shown. It includes four inverter bridge arms, four fast-blow fuses and two bidirectional thyristors; the four inverter bridge arms are connected in parallel to the public DC power supply; the two ends of a bidirectional thyristor are respectively connected to the armature winding A and the power supply. One port of the armature winding B, the two ends of the other two-way thyristor are respectively connected to the other port of the armature winding A and the armature winding B, and the two ports of the armature winding A are respectively connected to the two inverters through the fast blow fuse The midpoints of the bridge arms are connected, and the two ports of the armature winding B are respectively connected to the midpoints of the other two inverter bridge arms through fast-blow fuses. When any bridge arm of the system inverter fails, the proposed fault-to...

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Abstract

The invention discloses a space vector control method of a fault tolerance system of a PMSM. A deviation of the rotating speed is obtained according to a given reference rotating speed of the motor, areference quadrature-axis (q-axis) current signal is generated by a rotating speed regulator, a given reference q-axis current signal, the reference q-axis current signal, a direct-axis (d-axis) current and a q-axis current are used to determine a current deviation, a reference DC voltage and a DC q-axis voltage are obtained from the current deviation via a current regulator, a reference voltagein a two-phase static coordinate system is obtained by coordinate transformation, a fault reason is determined via a fault signal and a reference voltage, an SVM fault tolerance control module is usedto calculate space voltage vectors of a control inverter in different faults, a modulation signal obtained by calculation is sent to a PWM chopper module to obtain ON/OFF triggering signals of bridgearms of the fault tolerance inverter of the two-phase PMSM, and tolerance control of the two-phase PMSM is realized. The method is highly practical and universal, and is suitable for different typesof two-phase motors.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a space vector control method for a fault-tolerant system of a permanent magnet synchronous motor. Background technique [0002] The stator of the two-phase permanent magnet synchronous motor generally uses two windings, and the two-phase windings are usually placed separately according to 90 electrical angles. The two-phase permanent magnet synchronous drive is usually driven by two-phase sine wave voltage with a phase difference of 90 degrees. The driving method is relatively simple and effectively reduces the cost of driving hardware. For low-cost applications, since there is no special two-phase power supply, single-phase power is generally used. The phase difference is formed by connecting capacitors in one phase to generate starting torque. Now it is more commonly used in refrigerators, air conditioners, and washing machines. This motor. [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P27/08
CPCH02P21/0003H02P27/085
Inventor 林海贾骏司利云周熙炜陈金平巩建英龚贤武陈俊硕
Owner WEIHAI CREDITFAN VENTILATOR
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