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Synchronous motor torque detection rotor initial positioning device and method thereof

A synchronous motor and initial positioning technology, which is applied in the control of electromechanical transmission, generator control, motor generator control, etc., can solve the problem that permanent magnet synchronous motor cannot be used, and achieve high initial positioning accuracy, convenient operation and simple structure. Effect

Active Publication Date: 2014-02-26
上交苏北院(江苏)科技发展有限公司
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Problems solved by technology

This method requires a voltage sensor on the stator side, which is only suitable for electrically excited synchronous motors, and cannot be used for permanent magnet synchronous motors

Method used

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  • Synchronous motor torque detection rotor initial positioning device and method thereof
  • Synchronous motor torque detection rotor initial positioning device and method thereof

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0029] figure 1 As shown, the circuit is mainly composed of torque sensor U1, A / D conversion module U2, controller U3, D / A conversion module U4 and current generator U5. The output terminal of the controller U3 is connected to the input terminal of the D / A conversion module U4, and the controller U3 generates a current vector given digital signal and transmits it to the D / A conversion module U4; the output terminal of the D / A conversion module U4 is connected to the current generator The D / A conv...

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Abstract

The invention provides a synchronous motor torque detection rotor initial positioning device. The device comprises a torque sensor, an A / D conversion module, a controller, a D / A conversion module and a current generator which are successively connected. The controller adjusts the current generator through the D / A conversion module so as to generate current vectors with different directions and the current vectors are applied to a stator of the synchronous motor. The invention also provides a corresponding method. Compared to the prior art, the device and the method of the invention possess the following advantages that the torque sensor and the current generator are used to realize initial rotor positioning; initial positioning precision is high; noises are small; motor rotation is not needed; operation is reliable; the structure is simple; operation is convenient; the device and the method are suitable for an electro-magnetic synchronization motor and a permanent magnet synchronization motor.

Description

technical field [0001] The invention relates to a synchronous motor torque detection rotor initial positioning device, more specifically, a device and method for judging the initial position of the motor rotor by using the torque. Background technique [0002] Synchronous motors have the characteristics of large starting torque. Accurate initial positioning of the rotor position is a necessary condition for maximum torque start of synchronous motors. Existing methods include absolute encoder method, voltage model method and torque current method. [0003] The absolute value encoder method is to use the characteristics of the absolute value encoder, and the motor can directly read the rotor position information from the absolute value encoder when starting. This method is simple and reliable. The downsides are the hardware investment and the calibration issues that exist when installing for the first time. [0004] The voltage model method is widely used in the field of e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14
Inventor 姜建国徐亚军戴鹏罗乔树通
Owner 上交苏北院(江苏)科技发展有限公司
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