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Diode clamping multi-level topology of switched reluctance motor and control method of diode clamping multi-level topology

A switched reluctance motor and diode clamping technology, applied in motor control, AC motor control, control systems, etc., can solve problems such as series voltage equalization and complex control algorithms

Pending Publication Date: 2022-08-02
CHINA UNIV OF MINING & TECH +4
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Problems solved by technology

[0004] The present invention proposes a new type of multi-level topology and its control method for switched reluctance motor. Voltage and asymmetric flying capacitor multi-level topology requires a large number of flying capacitors to cause series voltage equalization and complex control algorithms

Method used

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  • Diode clamping multi-level topology of switched reluctance motor and control method of diode clamping multi-level topology
  • Diode clamping multi-level topology of switched reluctance motor and control method of diode clamping multi-level topology

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Embodiment Construction

[0012] figure 2 An example of a novel diode-clamped nine-level topology for switched reluctance motors, the phase windings of which can have up to nine levels. This topology requires a total of 8 switches, 8+24 diodes and 4 capacitors.

[0013] For a new type of diode-clamped nine-level topology of switched reluctance motor, the first control method is used: the method of comprehensive analysis of the left and right bridge arms is used, and the total modulation duty cycle signal and each switch duty cycle signal are fully utilized. Calculate the duty ratio of each switch when the adjacent levels are switched, the duty ratio of each switch and the high-frequency triangular carrier are subjected to carrier phase-shift PWM modulation to generate the required signal, and the signal generated by the left half bridge arm It is synthesized with the signal of the right half bridge arm, and then performs AND logic operation with the commutation logic output and current limiting logic...

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Abstract

The invention discloses a novel diode clamping multi-level topological structure of a switched reluctance motor and a control method of the novel diode clamping multi-level topological structure. The novel diode clamping multi-level topological structure is composed of controllable switches, diodes and direct current side voltage dividing capacitors. The maximum level number allowed to be generated by the phase-weighing winding is the level number of the topology, the M (M is a positive integer) level converter needs (M-1) power switch tubes and (M-1) * (M-3) / 2 + (M-1) power diodes, the (M-1) power diodes are main diodes corresponding to the power switch tubes, and the (M-1) * (M-3) / 2 power diodes are clamping diodes. The M level converter needs (M-1) / 2 flying capacitors. The multi-level topology supplies power to a single direct current source, the voltage borne by all devices is 2 / (M-1) times of the voltage of the direct current power source, and a novel multi-level topology scheme is provided for driving the switched reluctance motor.

Description

technical field [0001] The invention designs a novel multi-level topology of a switched reluctance motor and a control method thereof, belonging to the fields of power electronics and power transmission. Background technique [0002] The multi-level power conversion technology for switched reluctance motor drive mainly includes: multi-level converter topology, multi-level modulation strategy and related control strategies to improve the operation performance of multi-level inverter. However, the traditional three multi-level converters all use a clamping device to realize the clamping function, which requires many power devices and complex structures, resulting in problems such as large size, low efficiency and high cost, which greatly limits their use. Practical application range. Especially when the number of levels is high, there are too many redundant states of capacitor voltage, the neutral point potential and capacitor voltage balance control are complicated, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/092H02P27/08H02P29/028
CPCH02P25/092H02P27/08H02P29/028Y02B70/10
Inventor 陈昊段瑞敏方正基王国强姚宗伟王星张珂巩士磊
Owner CHINA UNIV OF MINING & TECH
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