Combined brushless direct-current starter generator system and control method thereof

A DC starting and compound technology, which is applied in the direction of single motor speed/torque control, generator control through magnetic field change, etc., can solve the problem of imbalance between starting power supply voltage and generator output voltage, etc., and achieve simple and reliable switching control, starting The effect of large torque and stable starting torque

Active Publication Date: 2014-03-26
南京兴航动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the imbalance between the starting power supply voltage and the output voltage of the generator i

Method used

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  • Combined brushless direct-current starter generator system and control method thereof
  • Combined brushless direct-current starter generator system and control method thereof
  • Combined brushless direct-current starter generator system and control method thereof

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Embodiment Construction

[0024] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0025] figure 1 A structural diagram of a preferred embodiment of the starter generator system of the present invention is shown, as shown in the figure, the brushless DC starter generator includes an electric excitation double salient pole motor and a permanent magnet motor, the permanent magnet motor rotor and the electric excitation double pole motor The rotor of the salient pole motor is connected coaxially, and the three-phase armature winding of the electrically excited double salient pole motor is connected in star form. Including diodes D7~D12 and filter capacitor C1), the bridge arm midpoint connection, the output positive terminal of the bridge type uncontrolled rectification circuit constitutes the generator output positive end of the starter generator system, the output negative end of the bridge type uncontrolled rectification circuit It c...

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Abstract

The invention discloses a combined brushless direct-current starter generator system and belongs to the field of starter power generation technologies. A brushless direct-current starter generator comprises an electrically-excited doubly-salient motor and a permanent magnet motor, wherein the motors are coaxially connected. An armature winding of the electrically-excited doubly-salient motor is connected with a bridge rectifier circuit to serve as a generation output end of the starter generator system. An armature winding of the permanent magnet motor is connected with a bidirectional bridge power conversion circuit and an asymmetric half-bridge circuit. An exciting winding is connected with a midpoint of the asymmetric half-bridge circuit. During starting, the permanent magnet motor drives an engine to start; after starting, the permanent magnet motor serves as the electrically-excited doubly-salient motor exciter providing the exiting winding with exciting current. The invention further discloses a control method of the combined brushless direct-current starter generator system. Starting torque is stable; power generation control is simple; the problem that starting source voltage and generation output voltage are unbalanced is solved; starting and generating functional decoupling control is achieved; starting and power generation switching is simple and reliable to control.

Description

technical field [0001] The invention relates to a starter generator system, in particular to a composite brushless DC starter generator system and a control method thereof, belonging to the technical field of starter generators. Background technique [0002] The electric excitation double salient pole motor has a simple structure and no winding on the rotor, which is suitable for high-speed operation and improves the power density of the motor. When it is used for power generation, it does not need a position sensor, and the control is flexible and convenient. Electric excitation doubly salient pole motor needs an independent DC excitation source whether it is electric or power generation. Setting up an exciter can solve its reliable excitation problem. [0003] The integration of starter and power generation can reduce the volume of the system and make the structure compact, especially in the field of independent power supply systems on automobiles and aircraft. When the e...

Claims

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Application Information

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IPC IPC(8): H02P6/08H02P9/30
Inventor 张卓然于立严仰光
Owner 南京兴航动力科技有限公司
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