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Error tolerant power converter used for switch reluctance motor

A technology of switched reluctance motors and power converters, applied in the direction of output power conversion devices, electronically commutated motor controls, electrical components, etc., can solve the problems that power converters do not have fault tolerance functions, etc., to ensure stability and reliability sexual effect

Inactive Publication Date: 2009-07-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the current power converters in switched reluctance motors do not have fault tolerance.

Method used

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  • Error tolerant power converter used for switch reluctance motor
  • Error tolerant power converter used for switch reluctance motor
  • Error tolerant power converter used for switch reluctance motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Taking the 12 / 8 structure three-phase switched reluctance motor as an example, use JMAG to establish a two-dimensional finite element model of the field-circuit coupling of the 12 / 8 structure switched reluctance motor, and the simulation system operates when the switching tube of the power converter in this embodiment fails When the current and torque characteristics.

[0015] Such as figure 1 As shown, a fault-tolerant power converter for switched reluctance motors consists of three redundant asymmetrical half-bridge circuits of main switching tubes with the same structure connected in parallel between the first bus bar and the second bus bar and a power supply Um, Composed of a filter capacitor Cm.

[0016] The redundant asymmetrical half-bridge circuit of the main switching tube of the first phase includes the first power switching tube T1, the second power switching tube T2, the seventh power switching tube T7, the eighth power switching tube T8, the first DC solid...

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PUM

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Abstract

The invention discloses a fault tolerant power inverter used for a switch reluctance motor. The fault tolerant power inverter comprises a main switching tube redundant unsymmetrical half-bridge circuit which has same three phases and is connected in parallel between a first and a second buses, a power supply and a storage capacitor; wherein, the first phase main switching tube redundant unsymmetrical half-bridge circuit comprises a first power switching tube, a second power switching tube, a seventh power switching tube, an eighth power switching tube, a first DC solid-state relay, a second DC solid-state relay, a first free wheeling diode and a second free wheeling diode. The stability and the reliability of the switched reluctance motor system are improved by the invention.

Description

technical field [0001] The invention relates to a fault-tolerant power converter for a switched reluctance motor in the field of motor drive. Background technique [0002] In some specific occasions, the switched reluctance motor system is required to have a certain fault tolerance function, that is, it can continue to run under fault conditions. The switched reluctance motor system is a mechatronic system composed of power electronic devices, motors and mechanical transmission devices. The main fault types include motor faults, power converter faults, position sensor faults, and load faults. In the actual operation, the failure rate of the power converter is relatively high, which is the weak link of the system reliability. The failures of the power converter mainly include: power switch tube open circuit fault; power switch tube breakdown and short circuit fault. However, the current power converters in switched reluctance motors do not have fault-tolerant functions. Co...

Claims

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Application Information

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IPC IPC(8): H02M1/32H02P6/00
Inventor 陈小元邓智泉王晓琳彭晶晶
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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