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A motor control method, system and vehicle

A motor control and controller technology, applied in the field of vehicles, can solve the problem of low motor control precision, achieve the effect of solving low motor control precision and improving motor control performance

Active Publication Date: 2018-09-21
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a motor control method, system and vehicle to solve the problem of low motor control precision in the prior art

Method used

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  • A motor control method, system and vehicle
  • A motor control method, system and vehicle
  • A motor control method, system and vehicle

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Effect test

Embodiment 1

[0049] Such as figure 1 As shown, the motor control method provided by Embodiment 1 of the present invention includes:

[0050] Step 11: Obtain the correspondence relation information between the quadrature axis inductance and the quadrature axis current;

[0051] Step 12: Obtain a lookup table according to the correspondence information, and the lookup table includes the corresponding motor torque, motor speed, direct axis current and quadrature axis current;

[0052] Step 13: Obtain the target direct-axis current and the target quadrature-axis current from the look-up table according to the motor torque and motor speed of the current cycle;

[0053] Step 14: Control the motor according to the target direct axis current and the target quadrature axis current.

[0054] The motor control method provided in Embodiment 1 of the present invention obtains the correspondence relation information between the quadrature axis inductance and the quadrature axis current, obtains the lo...

Embodiment 2

[0094] Such as Image 6 As shown, the motor control system provided by Embodiment 2 of the present invention includes:

[0095] The first controller 61 is used to obtain the correspondence information between the quadrature axis inductance and the quadrature axis current; according to the correspondence information, a lookup table is obtained, and the lookup table includes the corresponding motor torque, motor speed, and direct axis current and quadrature current;

[0096] The second controller 62 is configured to obtain the target direct-axis current and the target quadrature-axis current from the look-up table according to the motor torque and the motor speed of the current period; to control the motor according to the target direct-axis current and the target quadrature-axis current .

[0097] The motor control system provided by Embodiment 2 of the present invention obtains the correspondence relation information between the quadrature axis inductance and the quadrature ...

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Abstract

The invention provides an electric motor control method and system and a vehicle, wherein the electric motor control method comprises the following steps: information of a corresponding relation between quadrature-axis inductors and quadrature-axis currents is obtained, and a query table is obtained according to the corresponding relation; the query table comprises electric motor torque, electric motor rotating speed, direct-axis currents and the quadrature-axis currents that all correspond to each other; according to current electric motor torque and current electric motor rotating speed, an object direct-axis current and an object quadrature-axis current can be obtained from the query table; an electric motor can be controlled according to the object direct-axis current and the object quadrature-axis current. According to a solution provided in the invention, the information of the corresponding relation between the quadrature-axis inductors and the quadrature-axis currents is obtained, the query table is obtained according to the corresponding relation, influence of magnetic circuit saturation effects is taken into consideration, a solid foundation is laid for improvement of electric motor control performance while requirement for a real-time property is met, and a problem of low electric motor control precision of technologies of the prior art is solved.

Description

technical field [0001] The present invention relates to the technical field of vehicles, in particular to a motor control method, system and vehicle. Background technique [0002] In the face of increasingly severe energy and environmental problems, energy-saving and new energy vehicles are becoming research hotspots in various countries. The development of energy-saving and new energy vehicles, especially pure electric vehicles with zero pollution and zero emissions, is not only beneficial to my country's energy security and environmental protection. Protection is of great significance, and it is also an important direction for my country's automobile field to achieve transformation and upgrading and technological breakthroughs, and it is the future development trend of the automobile field. [0003] Pure electric vehicles drive the wheels through the motor to drive the vehicle. As the core of pure electric vehicles, motor drive and control have a great impact on the perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/22H02P27/08
CPCH02P27/08
Inventor 李玮代康伟梁海强李金虎刘超战平李明亮
Owner BEIJING ELECTRIC VEHICLE
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