Direct torque flux linkage control method for alternating-current magnetic adjustment type memory motor
A memory motor and flux linkage technology, applied in the field of electrical transmission, can solve the problems of complex algorithm process and slow dynamic response, and achieve the effect of fast dynamic response, low copper consumption, and prevention of accidental demagnetization.
Active Publication Date: 2020-04-10
SOUTHEAST UNIV
View PDF11 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, the AC magnetic modulation memory motor mainly adopts the current decoupling vector control method, but this method has the disadvantages of slow dynamic response and relatively complicated algorithm process due to real-time coordinate transformation
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
[0034] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.
[0035] This specific embodiment discloses a method for direct torque flux linkage control of an AC magnetic modulation memory motor, the principle block diagram of which is shown in figure 1 shown. The biggest difference between this method and the traditional permanent magnet synchronous motor direct torque control strategy is that it combines the magnetization state selection and adjustment characteristics of the memory motor, which can ensure the real-time adjustment of the air gap flux linkage during the operation of the motor.
[0036] Memory motor flux linkage and electromagnetic torque T e In the rotor coordinate system, it can be expressed as:
[0037]
[0038] In formula (1), ψ s , ψ d and ψ q are stator flux linkage, direct axis flux linkage component and quadrature axis flux linkage component respectively, i d and i q are ...
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 direct torque flux linkage control method for a rotor permanent magnet alternating-current magnetic adjustment type memory motor. The method mainly comprises the following steps of: in a normal working mode, adopting a direct torque control method under the condition that a direct-axis current id is equal to 0; when magnetic adjustment needs to be carried out, achieving magnetic adjustment by giving a flux linkage pulse signal in a short time; and recovering the direct torque control method under the condition that id is equal to 0 after the magnetism adjusting process is finished. Compared with a traditional alternating-current magnetic adjustment type memory motor vector control method, the method has the advantages that a complex real-time decoupling algorithmis avoided, the dynamic response of the motor is improved while the copper loss of a stator in the high-speed region of the motor is reduced, and the torque output capacity and the operation efficiency of the system are improved. Compared with the direct torque control method of a stator permanent magnet direct current magnetic adjustment type memory motor, the method does not need an additional magnetic adjustment winding and a magnetic adjustment power supply, and the structure of a drive control system is greatly simplified.
Description
[0001] Field [0002] The invention relates to the technical field of electric transmission, in particular to a direct torque flux linkage control method of an AC magnetic modulation type memory motor. Background technique [0003] Permanent Magnet Synchronous Machine (PMSM) is widely used in various occasions, especially electric vehicles, due to its inherent high efficiency and high power density characteristics. In order to obtain a wider constant power speed range (Constant Power Speed Range, CPSR), the current method of negative d-axis current is mostly used to offset the permanent magnet flux linkage. However, the continuous flux-weakening current will cause additional copper loss and reduce the system efficiency. In recent years, a type of memory motor (Memory Machine, MM) using low coercive force (Low Coercive Force, LCF) permanent magnets has attracted the attention of scholars at home and abroad for its convenient magnetic adjustment characteristics. This type of...
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): H02P25/02H02P23/30H02P23/00
CPCH02P23/00H02P25/02H02P23/30
Inventor 林鹤云王伟阳辉吕舒康刘威
Owner SOUTHEAST UNIV