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Optimal field weakening control method based on the safety of spring electric rudder system

A field weakening control and system safety technology, applied in motor generator control, electronic commutation motor control, control system, etc., can solve problems affecting full elastic safety design, etc., to improve dynamic response speed and improve field weakening performance. Effect

Active Publication Date: 2021-08-10
SHANGHAI AEROSPACE CONTROL TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the particularity of the application occasion, when using the magnetic field weakening algorithm to run at full power, it will inevitably put forward higher requirements on the performance of the steering gear itself, which will affect the safety design of the whole bomb

Method used

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  • Optimal field weakening control method based on the safety of spring electric rudder system
  • Optimal field weakening control method based on the safety of spring electric rudder system
  • Optimal field weakening control method based on the safety of spring electric rudder system

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Experimental program
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Effect test

Embodiment

[0018] Embodiment: The basic principle of this method is as follows: define the magnetic field weakening index J, and the optimal magnetic field weakening index is maxJ

[0019]

[0020] Let maxJ=f(i d ) = g(i d )·h(i d ), and i q 2 + i d 2 =I s 2 ;

[0021]

[0022]

[0023] Since g(i d )exist monotonically decreasing, h(i d )exist monotonically increasing, so f(i d )exist There is a local optimal solution. Umax is the voltage limit; I s is the current limit value; ω is the rotor speed; i d is the stator d-axis current component; i q is the q-axis current component, ψ f is the flux linkage of the permanent magnet of the rotor; T e is the electromagnetic torque; T L is the load moment; n p is an extreme logarithm.

[0024] Specific implementation steps: first detect the current speed ω and load torque T of the motor L , to obtain the output torque T at the current speed e , current limit value I s , d-axis inductance component L d and the ...

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Abstract

The invention discloses an optimal field-weakening control method based on the safety of the elastic electric rudder system, which detects the current speed and load torque of the motor, and obtains the output torque, current limit value, d-axis inductance component and q-axis inductance component at the current speed , define the field weakening index J, give the optimal field weakening control index based on the speed, output torque, and load torque, calculate the J value of the d-axis current component at different values, select the maximum value maxJ of the J value, and convert this value to The corresponding d-axis current component and q-axis current component are used as the control output at the current speed. The invention aims at the characteristics of tactical missiles that do not need to be reused, fast maneuvering, complicated working conditions, and short battery life under the same working conditions, and fully utilizes the weak magnetic speed-up ability of the electric steering gear for missiles under the condition of power surplus, and designs the direct-axis current The optimal allocation strategy and numerical calculation scheme are used to improve the magnetic weakening performance of the elastic electric rudder system.

Description

technical field [0001] The invention belongs to the technical field of electric steering gear servo control, in particular for improving the safety of a field weakening algorithm in electric steering gear control. Background technique [0002] At present, the field weakening control is mostly used for the speed control of electric driving devices such as electric vehicles. The performance requirements mainly focus on expanding the speed range of the motor so that it can run at full speed. As the core servo mechanism of the missile, the electric steering gear will affect the safe flight state of the whole missile. For the electric steering gear, the final focus of the position servo system is to quickly track the position target. Therefore, under the premise of speed regulation, more attention should be paid to "rapid arrival of the position", so there is a requirement for a rapid increase in the speed It is not limited to the ability of the highest speed, that is, there is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00
CPCH02P21/0089
Inventor 苏伟杰
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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