Sensorless control method for random triangular wave current injection of synchronous reluctance motor
A synchronous reluctance motor and current injection technology, applied in current controller, motor control, motor generator control and other directions, can solve the problem that the response current amplitude of synchronous reluctance motor changes with the load, etc., to increase the loss and Effects of torque ripple, improved usability, and reduced high frequency loss
Active Publication Date: 2021-10-15
SOUTHEAST UNIV
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
It is true that these two ideas have been verified to effectively reduce high-frequency noise, however, they still cannot solve the problem that the response current amplitude of synchronous reluctance motor varies with the load
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
[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0046] combine figure 1 As shown, the present invention provides a sensorless control method for synchronous reluctance motor random triangular wave current injection to suppress high-frequency noise, reduce high-frequency loss and high-frequency torque ripple, and the specific implementation method is as follows:
[0047] Step 1, when the synchronous reluctance motor is running, a random high-frequency triangular wave signal is injected into its estimated d-axis t...
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 discloses a sensorless control method for random triangular wave current injection of a synchronous reluctance motor. Aiming at the problem of high-frequency noise and the problem that loss is increased along with the load increase when a traditional high-frequency injection method is applied to the synchronous reluctance motor, an injection signal mode is improved, and a random high-frequency triangular wave current signal with random frequency and phase and constant amplitude is injected into an estimation d axis, a control panel A / D samples a three-phase current, and the three-phase current is converted to be under an alpha-beta axis through Clark conversion; a sinusoidal signal containing the position information is demodulated by using the alpha-beta axis current containing the fundamental wave and the high-frequency component, and the estimated rotor position and rotating speed are further obtained by using a phase-locked loop; and finally, the rotor position and the rotating speed obtained through observation are used for vector control of double closed loops to achieve the sensorless control. The method is used for realizing the low-noise, low-pulse and low-loss high-performance sensorless control of the synchronous reluctance motor at zero low speed.
Description
technical field [0001] The invention relates to a sensorless control method for random triangular wave current injection of a synchronous reluctance motor, which is suitable for aerospace, household appliances, electric vehicles and other industrial fields that are not suitable for installing position sensors or are sensitive to cost. Background technique [0002] As an alternative to induction motors and permanent magnet synchronous motors, synchronous reluctance motors have received widespread attention in the industry in recent years due to their advantages of simple manufacturing, high efficiency, and low cost. In addition, sensorless control schemes are crucial for synchronous reluctance motor drives in some cost-sensitive applications. [0003] According to different operating speed domains, the sensorless control algorithm can be divided into two types: medium and high speed and zero and low speed. In the medium and high speed domain, the method based on the back EMF...
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 Applications(China)
IPC IPC(8): H02P6/10H02P6/28H02P21/14H02P21/22H02P25/022H02P25/08H02P27/08
CPCH02P6/10H02P6/28H02P21/14H02P21/22H02P25/022H02P25/08H02P27/08H02P2205/01H02P2207/05
Inventor 樊英陈俊磊王越琦
Owner SOUTHEAST UNIV