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Permanent magnet synchronous motor speed control system and method for electric vehicle

A permanent magnet synchronous motor, electric vehicle technology, applied in the direction of motor generator control, motor control, AC motor control, etc., can solve the problem of friction coefficient change, increase torque and other problems

Active Publication Date: 2019-09-27
NANJING JINQI NEW ENERGY POWER RES INST CO LTD
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Problems solved by technology

However, there are still many problems in order to achieve high-performance control of permanent magnet synchronous motors for electric vehicles: due to the variability of the operating environment, electric vehicles need frequent acceleration and deceleration, increased torque, braking, etc.; The resistance, inductance, flux linkage, moment of inertia, friction coefficient, etc. of the magnetic synchronous motor will all change; all of these need to improve the control performance of the control system to cope with changes in the external environment

Method used

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  • Permanent magnet synchronous motor speed control system and method for electric vehicle
  • Permanent magnet synchronous motor speed control system and method for electric vehicle
  • Permanent magnet synchronous motor speed control system and method for electric vehicle

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Embodiment Construction

[0127] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0128] Such as figure 1 As shown, a permanent magnet synchronous motor (permanent magnet synchronous motor, PMSM) control system for electric vehicles, including: fuzzy adaptive sliding mode speed controller, extended state observer (extended state observer, ESO), dq axis internal model current control Inverter, anti-park transformation module, SVPWM vector pulse width modulation module, three-phase inverter, permanent magnet synchronous motor, clark transformation module, park transformation module, current sensor and position and speed sensor.

[0129] Described position and speed sensor obtain position θ and speed ω through seeking m After that, the given velocity ω ref and the output speed signal ω m do difference, and ω ref with ω m The differential of the difference is used as the input of the fuzzy adapti...

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Abstract

The invention discloses a permanent magnet synchronous motor speed control system and method for an electric vehicle. The method comprises the steps of obtaining a q-axis desired current according to a designed fuzzy adaptive sliding-mode speed controller, and setting the d-axis reference current as 0; according to a disturbance value feedback compensation observed by a designed disturbance extended state observer, using the q-axis current output from the fuzzy adaptive sliding-mode speed controller as the q-axis input of a dq-axis internal mode current controller; using the difference of a d-axis feedback current value and the given d-axis current value 0 as the d-axis input of the dq-axis internal mode current controller; obtaining ud and uq after the processing by the dq-axis internal mode current controller, and finally outputting the driving voltage currently operated by the permanent magnet synchronous motor through the vector-controlled inverse park conversion, the SVPWM and an inverter. The method increases the response speed and the anti-disturbance performance of the permanent magnet synchronous motor for the electric vehicle, avoids an overshoot phenomenon, reduces system buffeting, and enhances system robustness.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor control method, in particular to a permanent magnet synchronous motor control system and control method for an electric vehicle. Background technique [0002] The permanent magnet synchronous motor has the advantages of high efficiency and convenient control, and is the main trend of electric vehicle motors. The permanent magnet synchronous motor for electric vehicles mainly includes two parts: torque control and speed control. The vector control method can efficiently realize the speed and torque control of the permanent magnet synchronous motor. However, there are still many problems in order to achieve high-performance control of permanent magnet synchronous motors for electric vehicles: due to the variability of the operating environment, electric vehicles need frequent acceleration and deceleration, increased torque, braking, etc.; The resistance, inductance, flux linkage, moment of in...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/13H02P21/22H02P25/022B60L15/20
CPCB60L15/20H02P21/0007H02P21/001H02P21/13H02P21/22H02P25/022H02P2205/01H02P2205/07H02P2207/05Y02T10/64Y02T10/72
Inventor 余海涛王尧夏涛李东暘王玉晨张建文杨依林郭蓉
Owner NANJING JINQI NEW ENERGY POWER RES INST CO LTD
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