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IGBT module carrier frequency adjusting method and device, storage medium and equipment

A technology of carrier frequency and adjustment method, which is applied in transportation and packaging, speed/torque control of multiple motors, electric vehicles, etc. The effect of avoiding the reduction of the cruising range and reducing the number of times of switching on and off

Pending Publication Date: 2022-03-25
JAINGXI ISUZU AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, the purpose of the present invention is to provide a method, device, storage medium and equipment for adjusting the carrier frequency of an IGBT module, so as to solve the problem that the higher the carrier frequency in the background technology, the more times the switching losses will increase, and finally the entire drive system Increased loss, resulting in a reduction in the mileage of the vehicle

Method used

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  • IGBT module carrier frequency adjusting method and device, storage medium and equipment
  • IGBT module carrier frequency adjusting method and device, storage medium and equipment
  • IGBT module carrier frequency adjusting method and device, storage medium and equipment

Examples

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Effect test

Embodiment 1

[0048] see figure 1 , shows the IGBT module carrier frequency adjustment method in the first embodiment of the present invention, including steps S11-S14.

[0049] S11. Obtain an opening degree signal and a current motor rotation speed, the opening degree signal includes acquiring a brake pedal opening degree signal and an accelerator pedal opening degree signal, and obtain a vehicle torque demand according to the opening degree signal and the current motor rotation speed.

[0050] Such as Figure 4 As shown, during the normal running of the vehicle, the driver manipulates the accelerator pedal and the brake pedal, and the pedal position sensor generates a corresponding opening signal. And the opening signal of accelerator pedal 3. At the same time, the motor controller (MCU) 6 takes the current number of revolutions of the motor 5 through the low-voltage wiring harness 4 at the motor end, and the motor controller (MCU) 6 sends a message (motor revolution number) through the v...

Embodiment 2

[0064] see figure 2 , shows the IGBT module carrier frequency adjustment method in the first embodiment of the present invention, including steps S21-S26.

[0065] S21. Obtain an opening degree signal and a current motor rotation speed, the opening degree signal includes obtaining a brake pedal opening degree signal and an accelerator pedal opening degree signal, and obtain a vehicle torque demand according to the opening degree signal and the current motor rotation speed.

[0066] Such as Figure 4 As shown, during the normal running of the vehicle, the driver manipulates the accelerator pedal and the brake pedal, and the pedal position sensor generates a corresponding opening signal. And the opening signal of accelerator pedal 3. At the same time, the motor controller (MCU) 6 takes the current number of revolutions of the motor 5 through the low-voltage wiring harness 4 at the motor end, and the motor controller (MCU) 6 sends a message (motor revolution number) through th...

Embodiment 3

[0084] Another aspect of the present invention also provides an IGBT module carrier frequency adjustment device, please refer to image 3 , shows the block diagram of the IGBT module carrier frequency adjustment device, the device shown includes:

[0085] The torque demand calculation module is used to obtain the opening degree signal and the current motor rotation number, the opening degree signal includes obtaining the brake pedal opening degree signal and the accelerator pedal opening degree signal, according to the opening degree signal and the current motor rotation number Obtain vehicle torque demand;

[0086] A carrier frequency calculation module, configured to determine the target operating frequency of the motor according to the number of revolutions of the motor, and determine the carrier frequency of the electric drive system according to the target operating frequency;

[0087] The carrier frequency adjustment module is used to adjust the carrier frequency of the...

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Abstract

The invention provides an IGBT module carrier frequency adjusting method and device, a storage medium and equipment, and the method comprises the steps: obtaining an opening signal and a current motor rotation number, and calculating a torque demand according to the opening signal and the current motor rotation number; determining an operation frequency satisfying motor operation according to the motor rotation speed, and determining a carrier frequency of the electric drive system according to the operation frequency; controlling the driving chip to output the carrier frequency of the PWM signal at the carrier frequency according to the torque demand and the carrier frequency; and the on-off frequency of the IGBT module is controlled according to the carrier frequency of the PWM signal. According to the IGBT module carrier frequency adjusting method and device, the storage medium and the equipment, the carrier frequency meeting the motor operation frequency is calculated by obtaining the current motor revolution number, and the PWM signal carrier frequency output by the driving chip is controlled according to the carrier frequency, so that the carrier frequency is reduced, and the driving efficiency is improved. The reduction of the carrier frequency also reduces the on-off times of the IGBT module and the overall switching loss.

Description

technical field [0001] The invention relates to the technical field of electric drive systems, in particular to a method, device, storage medium and equipment for adjusting the carrier frequency of an IGBT module. Background technique [0002] With the rapid development of new energy vehicles, the efficiency of the electric drive system of new energy vehicles is a very important consideration in the design of new energy vehicles. Since the electric drive system receives the torque request from the vehicle controller, the motor controller responds to the torque, and the drive circuit drives the IGBT module on and off. The entire controller inverts the input DC through the three-phase six-wire system of the IGBT module. Control the on-off PWM signal carrier frequency of the IGBT module to adjust the output of the working conditions required by the vehicle. [0003] When the drive circuit drives the IGBT module on and off, there will be a certain switching loss of the IGBT mod...

Claims

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Application Information

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IPC IPC(8): B60L15/20H02P6/04H02P27/08
CPCB60L15/20H02P6/04H02P27/08Y02T10/64Y02T10/72
Inventor 熊慧慧邓建明代士青罗锋张萍施鑫隆张俊邹发明
Owner JAINGXI ISUZU AUTOMOBILE CO LTD
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