Buck-boost multi-level topology of switched reluctance motor and control method thereof
A technology of switched reluctance motor and control method, which is applied in the direction of motor control, AC motor control, control system, etc., and can solve the problems of complex control algorithm circuit, inability to step up and down, complex control algorithm, flying capacitor voltage, etc.
Pending Publication Date: 2022-08-02
CHINA UNIV OF MINING & TECH +4
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[0004] The present invention proposes a new type of multilevel topology and its control method for a switched reluctance motor, and its purpose is to solve the traditional asymmetric diode clamp multilevel topology neutral point potential control algorithm for driving a switched reluctance motor Complex and asymmetrical flying capacitor multi-level topology flying capacitor voltage control algorithm is complex and the circuit cannot be boosted or boosted
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[0012] figure 2 It is an example of a new buck-boost seven-level topology for switched reluctance motors, and the phase windings of this topology can have up to seven levels. This topology requires a total of 10 switches, 6 diodes and 4 capacitors.
[0013] For a new type of buck-boost seven-level topology structure of switched reluctance motor, the first control method is used: the duty cycle and high-frequency triangular carrier are used for carrier stacking PWM modulation to generate the required signal, and the left half-bridge The signal generated by the arm is synthesized with the signal of the right half bridge arm, and then performs an AND logic operation with the commutation logic output and the current limiting logic output of the switched reluctance motor, and finally generates three-phase respective switching signals to drive the switching work of this topology.
[0014] For a new type of buck-boost seven-level topology structure of switched reluctance motor, the...
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The invention discloses a novel buck-boost multi-level topological structure of a switched reluctance motor and a control method of the novel buck-boost multi-level topological structure. The novel buck-boost multi-level topological structure is composed of controllable switches, diodes and flying capacitors. The maximum level number allowed to be generated by the phase-weighing winding is the level number of the topology, and the M (M is a positive odd number greater than or equal to 3) level converter needs 2 * (M-2) power switch tubes and (M-1) power diodes. And the M level converters share (M-3) flying capacitors. The multi-level topology supplies power to a single direct-current source, the M-level converter can be boosted to positive (M-1) / 2 times of direct-current power supply voltage and can also be reduced to negative (M-1) / 2 times of direct-current power supply voltage, and the voltage borne by all devices is the direct-current power supply voltage. The topology has the capacity of automatically balancing the capacitor voltage, 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 ...
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IPC IPC(8): H02P25/092H02P27/08H02P29/028
CPCH02P25/092H02P27/08H02P29/028
Inventor 陈昊王国强姚宗伟段瑞敏方正基王星张珂巩士磊
Owner CHINA UNIV OF MINING & TECH