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Permanent magnet synchronous motor parameter identification method and device and controller

A permanent magnet synchronous motor and parameter identification technology, which is applied in the direction of motor parameter estimation/correction, can solve the problems of harsh realization conditions, test result errors, and inability to obtain motor parameters more comprehensively, so as to achieve simple realization and high test results. accurate effect

Inactive Publication Date: 2018-07-31
BEIJING ELECTRIC VEHICLE
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a permanent magnet synchronous motor parameter identification method, device and controller to solve the problem that the existing technology has relatively harsh implementation conditions, difficult implementation process, easy to cause large errors in test results, and cannot be compared. The problem of comprehensively obtaining motor parameters under different working conditions

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  • Permanent magnet synchronous motor parameter identification method and device and controller
  • Permanent magnet synchronous motor parameter identification method and device and controller
  • Permanent magnet synchronous motor parameter identification method and device and controller

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Embodiment Construction

[0064] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0065] See figure 1 , which shows a schematic flowchart of a method for identifying parameters of a permanent magnet synchronous motor provided by an embodiment of the present invention. An embodiment of the present invention provides a method for identifying parameters of a permanent magnet synchronous motor, which is applied to a motor controller under test and may include the following steps:

[0066] Step 101, acquiring a first parameter when the motor under test is working at a preset current.

[0067] In this step, after the host computer controls the dragging motor to work in the speed mode and drags the motor under test to work at a constant speed, it receives the preset current command sent by the host computer to make the motor under test work...

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Abstract

The invention provides a permanent magnet synchronous motor parameter identification method and device and a controller. The permanent magnet synchronous motor parameter identification method comprises the steps that the first parameter of the tested motor working at the preset current is acquired; the second parameter of the tested motor is determined according to the first parameter; and the q-axis inductance, the rotor permanent magnet flux linkage and the d-axis inductance are calculated according to the first parameter and the second parameter. The required permanent magnet synchronous motor parameter under each condition can be acquired according to the demand, and implementation is easy and the test result is accurate.

Description

technical field [0001] The invention relates to the technical field of electrical appliances, in particular to a parameter identification method, device and controller of a permanent magnet synchronous motor. Background technique [0002] The electric vehicle motor drive system not only affects the power and economy of the electric vehicle, but also affects the ride comfort of the vehicle. The quality of the electric vehicle drive motor control directly affects the user experience of the vehicle. In order to improve the ride comfort of the vehicle from the perspective of the power system, precise control of the electric drive system must be achieved, and the control of the permanent magnet synchronous motor depends on the parameters of the motor. [0003] Due to the different division of labor, the driving motor and motor controller in an electric vehicle electric drive system may be provided by different manufacturers, and it is impossible for the driving motor manufacturer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P23/14
CPCH02P23/14
Inventor 曹永霞刘立志蒋荣勋苏伟
Owner BEIJING ELECTRIC VEHICLE