An active thermal control method for an electric vehicle controller and its application system

A technology for electric vehicles and controllers, applied in electric vehicles, control drives, motors, etc., can solve the problem of conservative output capability of power devices, and achieve the effects of reducing the probability of device failure, smoothing temperature fluctuations, and strong robustness.

Active Publication Date: 2022-03-25
NANJING UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a controller active thermal control method and its application system, which solves the problem that the output capacity of power devices is too conservative in the existing electric vehicle controller thermal protection method

Method used

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  • An active thermal control method for an electric vehicle controller and its application system
  • An active thermal control method for an electric vehicle controller and its application system
  • An active thermal control method for an electric vehicle controller and its application system

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] According to the active thermal control method of an electric vehicle controller according to the present invention, the steps of the control method are as follows:

[0025] Step 1, DSP28035 processor 3 outputs 6 channels of PWM voltage drive signals according to the real-time feedback signals of temperature acquisition circuit 5, current acquisition circuit 6, and voltage acquisition circuit 7, and the power of the drive signal is amplified by drive circuit 4, and output to the three-phase Inverter 22;

[0026] Step 2, the Clark transformation 28 and the Park transformation 27 in the motor vector control system 2 convert the two-phase stator current ia, ib of the asynchronous motor 21 into the current iq, id under the two-phase rotating coordinate system; the flux linkage observer 26 according to iq , id and the speed n of the asynchronous motor 21 c...

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Abstract

The invention discloses an active thermal control method for an electric vehicle controller, comprising a fuzzy controller, a motor vector control system, a DSP28035 processor, a drive circuit, a temperature acquisition circuit, a current acquisition circuit, a voltage acquisition circuit, SCI communication, a host computer, In a three-phase inverter, the output of the temperature detection circuit is connected to the AD pin of the DSP28035 processor, and the DSP28035 processor is connected to the host computer through SCI communication. Through the temperature acquisition circuit, the DSP28035 processor can measure the actual temperature of the controller in real time, and The real-time temperature value is transmitted to the controller temperature closed-loop fuzzy controller based on software, and the reasonable maximum limit value of the torque current in the motor vector control system is calculated, so as to realize the active thermal management of the controller temperature. The invention solves the problems that the temperature protection of the existing electric vehicle controller is too conservative and the electric vehicle's load capacity is low, effectively reduces the failure rate of the electric vehicle controller caused by overheating, and simultaneously improves the electric vehicle's load capacity.

Description

technical field [0001] The invention belongs to the electric vehicle motor control technology, and in particular relates to a controller active thermal control method and an application system thereof. Background technique [0002] With the development of power electronics technology, power devices such as MOSFET and IGBT have been widely used in the field of electric vehicle control. The package size is gradually reduced, but the power level and heat flux requirements are gradually increased, and various failures caused by high temperature are prone to occur, thereby affecting the service life and reliability of the motor controller. Therefore, it is necessary to collect the operating temperature of the controller in real time to realize corresponding active thermal control and overheating protection, so as to improve its operational reliability and better driving experience. [0003] Traditional industrial motors are different. Under working conditions such as climbing an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/00B60L15/20
CPCB60L15/00B60L15/20Y02T10/64Y02T10/72
Inventor 应展烽张伟张旭东姜鑫钟震
Owner NANJING UNIV OF SCI & TECH
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