A Method of Identification of Parameters of Electrically Excited Synchronous Motor
A technology of synchronous motor and identification method, which is applied in the direction of motor generator control, electronic commutation motor control, control generator, etc., to achieve the effect of solving the identification problem
Active Publication Date: 2019-09-13
浙江日风电气股份有限公司
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] In order to solve the problems existing in the existing methods, the present invention provides a method for identifying parameters of electric excitation synchronous motors
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.
[0026] combined with figure 2 , the present invention is mainly a method for identifying parameters of an electrically excited synchronous motor, comprising the following steps:
[0027] Step 1: Control the q-axis current of the electrically excited motor to be 0, and set the d-axis inductance L d and magnetizing inductance L f Equivalent to the stator and rotor of a transformer. image 3 It is the circuit diagram of the excitation winding and the stator winding of the electrically excited synchronous motor in the d-q rotating coordinate system oriented by the rotor flux linkage. Equivalent circuit of electrically excited synchronous motor Figure 4 As shown, the D-axis inductance and the excitation inductance are equivalent to forming a transformer. Neglecting the influence...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method for identifying parameters of electrically excited synchronous motors. The method includes steps of allowing q-axis currents of the electrically excited synchronous motors to be equal to 0 under the control and allowing d-axis inductance L<d> and excitation inductance L<f> of the electrically excited synchronous motors to be equivalent to stators and rotors of transformers; measuring the excitation inductances L<f>; applying direct-current voltages U<f_dc> onto excitation circuits and generating direct currents I<f_dc>; controlling the direct currents I<f_dc> until the direct currents <f_dc> reach rated magnitude; applying an alternating-current voltage with fixed frequencies f onto each D-axis, generating an alternating current with the same frequencies f on the D-axis of each electrically excited synchronous motor, and generating an alternating current I<f_ac> by means of induction; computing alternating currents on d-axes and alternating-current components generated on the excitation circuits by means of induction so as to obtain turn ratios K<n> of the excitation inductance L<f> to the d-axis inductance L<d>; computing the d-axis inductances L<d> according to the turn ratios K<n>. The method has the advantage that the direct-axis inductance L<d> and the turn ratios K<n> of the electrically excited synchronous motors can be identified by the aid of the method.
Description
technical field [0001] The invention relates to an identification technology of motor parameters, in particular to a method for identifying parameters of an electric excitation synchronous motor. Background technique [0002] The commonly used topological structure of the machine side of the electric excitation motor converter is as follows: figure 1 shown. The main circuit generally adopts a three-phase three-bridge structure, and the excitation module generally adopts a Buck step-down circuit. [0003] The parameter identification technology is divided into offline parameter identification (measure the motor parameters before starting up) and online parameter identification (recognize the changes of the motor parameters in real time by measuring the voltage and current data during the system operation). There are many technical literatures on parameter identification of permanent magnet synchronous motors, but few literatures on parameter identification of electric excit...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/16
Inventor 张欢何瑞志
Owner 浙江日风电气股份有限公司