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Method for fixing turn-off angle and optimizing turn-on angle of switched reluctance generator

A technology of switched reluctance and fixed shutdown, applied in the direction of controlling generators, electrical components, control systems, etc., can solve the problems of heavy workload, complicated process, lack of theoretical basis, etc., and achieve good versatility and reduce workload Effect

Inactive Publication Date: 2009-11-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0003] ①At present, domestic and foreign scholars' research on the angle control of switched reluctance generators is mainly focused on optimizing the opening and closing angles to obtain the maximum output power through simulation and experiments. This optimization method relies on experience accumulation and practice, and to a certain extent lack of theoretical basis
[0004] ②The traditional angle optimization method requires multiple simulations and experiments to obtain results, the process is complex and the workload is heavy
[0005] ③The conclusion of the traditional angle optimization method is only valid for the motor object that is simulated and tested, and it is not universal. When the motor object changes, it is necessary to re-simulate and experiment
[0006] ④ The results of the traditional angle optimization method vary with the simulation conditions and experimental environment, and its accuracy is limited by the number of simulations and experiments

Method used

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  • Method for fixing turn-off angle and optimizing turn-on angle of switched reluctance generator
  • Method for fixing turn-off angle and optimizing turn-on angle of switched reluctance generator
  • Method for fixing turn-off angle and optimizing turn-on angle of switched reluctance generator

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Embodiment Construction

[0031] The method of the present invention is divided into the following steps: 1. initialization inductance parameter L max , K, θ 1 , θ 2 , θ 4 , θ 6 and turn-off angle θ 3 , note that the origin of the coordinates should be in the rising section of the inductance and the turn-off angle should be in the falling section of the inductance (see attached image 3 ). 2. Determine whether the initialization is reasonable. If it is reasonable, calculate the range of opening angle increments. Otherwise, return to step 1 and re-initialize. The process of this step is shown in the appendix figure 2 . 3. Calculate F(X 1 ), F(X 2 ). 4. Find the opening angle increment corresponding to the maximum average electromagnetic power. F(Δθ on ) of the second order derivative is always positive on the change interval of opening angle increment (see attached Figure 4 ), the optimal opening angle increment can be obtained by comparing the two ends of the interval. 5. Define the positi...

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Abstract

The invention discloses a method for fixing a turn-off angle and optimizing a turn-on angle of a switched reluctance generator, and belongs to the technical field of switched reluctance generator control. The method comprises the following steps of: 1, firstly deducing a phase current expression according to a voltage equation of the switched reluctance generator, integrating based on the expression to evaluate an average electromagnetic power expression in a cycle, and isolating a factor only related to the turn-on angle and the turn-off angle from the expression; and 2, then fixing the turn-off angle, making the turn-on angle change in a reasonable range, taking the factor as a one-variable function of the turn-on angle, and solving the turn-on angle corresponding to the maximum value of the one-variable function according to the characteristic of higher derivative of the one-variable function. The method has the advantages of theoretical basis, simpleness and good commonality.

Description

technical field [0001] The invention relates to a method for optimizing the opening angle by fixing the cut-off angle of a switched reluctance generator, and belongs to the technical field of switched reluctance generator control. Background technique [0002] The control of switched reluctance generator is usually divided into three types: current chopping control, voltage PWM control and angle position control. [0003] ①At present, domestic and foreign scholars' research on the angle control of switched reluctance generators is mainly focused on optimizing the opening and closing angles to obtain the maximum output power through simulation and experiments. This optimization method relies on experience accumulation and practice, and to a certain extent Lack of theoretical basis. [0004] ②The traditional angle optimization method requires multiple simulations and experiments to obtain the results, which is complicated and requires a lot of work. [0005] ③The conclusion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/00
Inventor 姚瑱邓智泉曹鑫蔡骏庄铮
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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