Method and system for determining rotor position
A technology for determining position and rotor position, applied in control systems, vector control systems, control electromechanical transmissions, etc., can solve the problems of measurement errors and mismatches, and achieve the effect of avoiding measurement errors and improving accuracy
Inactive Publication Date: 2018-04-24
BMCTIANJIN MEDICAL CO LTD
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Problems solved by technology
[0006] It can be seen that the angle θ of the rotor 2 during the high level and low level is triggered by the rising edge / falling edge corresponding to θ base It is calculated with T, but in actual operation due to the sequence problem, if the θ base There is a rising or falling edge during the acquisition of the two parameters of T and T, which will cause θ base The two parameters of T and T do not correspond, so there is a measurement error
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[0026] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.
[0027] figure 2 is a flow chart of the rotor position acquisition method provided by the present invention, such as figure 2 As shown, the process includes:
[0028] Step 201, acquire the position information of the rotor in the register twice consecutively, so as to obtain two pending position information of the rotor.
[0029] Step 202, determine the determined position information of the rotor according to the two pending position information.
[0030] "Pending position information" refers to undetermined rotor position information, and "determined position information" re...
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An embodiment of the invention provides a method and system for determining rotor position and belongs to the technical field of rotor position acquisition. The rotor position acquiring method includes acquiring position information of a rotor in a register in two continuous processes so as to obtain the two pieces of to-be-determined position information of the rotor; and determining the determined position information of the rotor according to the two pieces of to-be-determined position information. According to the invention, the position information of the rotor is determined through acquiring the position information of the rotor in the register in the two continuous processes, so that measurement errors can be avoided and rotor position acquisition accuracy can be improved.
Description
technical field [0001] The present invention relates to the technology of determining the position of the rotor, in particular to a method and system for determining the position of the rotor. Background technique [0002] The vector control of the motor needs to obtain the precise position information of the rotor. As a low-resolution position sensor, the Hall position sensor has the advantages of simple installation, low cost, and small size, but it has certain deficiencies in the accuracy of rotor position acquisition. [0003] figure 1 It is a schematic diagram of the process of obtaining position information by the Hall position sensor provided by the prior art, such as figure 1 As shown, the pulse signal of the position information of the rotor 2 is obtained through the Hall position sensor 1, and the pulse signal of the position information of the rotor 2 is obtained through figure 1 It can be seen from the signal diagram in the figure that the angle θ of the rotor ...
Claims
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IPC IPC(8): H02P21/18
CPCH02P21/18H02P2203/03
Inventor 易萍虎齐丹陈鹏
Owner BMCTIANJIN MEDICAL CO LTD