Observation method of stator flux linkage of permanent magnet synchronous motor, flux linkage observer and storage medium
A technology of permanent magnet synchronous motor and stator flux linkage, which is applied to the control of generators, motor generators, and electromechanical brakes. Magnet link accurate effect
Active Publication Date: 2017-11-28
GUANGDONG WELLING ELECTRIC MACHINE MFG +1
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[0008] The main purpose of the present invention is to provide a permanent magnet synchronous motor stator flux observation method, flux observer and storage medium, aiming to solve the technical problem of inaccurate stator flux in the prior art
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[0045] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0046] refer to figure 1 , figure 1 It is a schematic structural diagram of the flux linkage observer of the hardware operating environment involved in the solution of the embodiment of the present invention.
[0047] like figure 1As shown, the flux linkage observer may include: a processor 1001 , such as a CPU, a communication bus 1002 , a user interface 1003 , and a memory 1004 . Wherein, the communication bus 1002 is used to realize connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The memory 1004 can be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. ...
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The invention discloses an observation method of a stator flux linkage of a permanent magnet synchronous motor, a flux linkage observer and a storage medium. The method comprises steps of by searching linearity zones of all mapping curves in a mapping curve set, carrying out resistance identification based on the linearity zones; acquiring stator resistance of the permanent magnet synchronous motor; acquiring the current temperature value of a switch device on a motor frequency converter; according to the current temperature value, determining a corresponding current time delay time difference by use of the mapping curve set; according to the current time delay time difference, correcting the instruction voltage; and according to the stator resistance and the corrected instruction voltage, calculating the stator flux linkage of the permanent magnet synchronous motor. Thus, the used stator resistance and the used instruction voltage are quite precise and the stator flux linkage is quite precise.
Description
technical field [0001] The invention relates to the technical field of flux linkage observation, in particular to a method for observing flux linkage of a stator of a permanent magnet synchronous motor, a flux linkage observer and a storage medium. Background technique [0002] Permanent magnet synchronous motors have the advantages of high efficiency, high power density, small torque ripple, and wide speed range, and are currently widely used in home appliances, electric vehicles, high-speed rail, aerospace and other fields. [0003] The common permanent magnet synchronous motor frequency conversion speed regulation system usually performs speed closed-loop control according to the speed given signal and speed feedback signal, so the speed sensor is required to obtain speed information. However, installing a speed sensor not only increases the cost, but the speed sensor is prone to failure in some severe working conditions, resulting in a decrease in the reliability of the ...
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IPC IPC(8): H02P21/14
CPCH02P21/14
Inventor 徐磊黄亮付俊永秦向南
Owner GUANGDONG WELLING ELECTRIC MACHINE MFG