Digital implementation method for sampling high-side IGBT temperature and bus voltage of motor controller

A technology of motor controller and bus voltage, applied in computer control, program control, general control system, etc., can solve the problems that the voltage and temperature cannot be obtained, and the consistency of the controller cannot be guaranteed, so as to achieve the improvement of control accuracy and monitoring Accuracy improvement and consistency, good consistency effect, good stability effect

Pending Publication Date: 2021-12-14
刘丽丽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the disadvantages that the existing technology adopts the IGBT junction temperature and bus voltage sampling scheme, which cannot really obtain accurate voltage and temperature, and at the same time cannot ensure the consistency of each controller to achieve the overall performance improvement effect. A digital implementation method of high-side IGBT temperature and bus voltage sampling of the motor controller is proposed

Method used

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  • Digital implementation method for sampling high-side IGBT temperature and bus voltage of motor controller
  • Digital implementation method for sampling high-side IGBT temperature and bus voltage of motor controller

Examples

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Effect test

Embodiment 1

[0027] refer to Figure 1-2 , a digital implementation method for sampling the high-side IGBT temperature and the bus voltage of the motor controller, including the following steps:

[0028] S1: Ready mode switch, sample and hold circuit, voltage divider discharge E-Δ circuit and reference comparison circuit, calculation trigger output circuit, set voltage divider resistor, delay circuit, two frequency divider circuit, square wave timing circuit, square wave divider frequency setting control, and at the same time connect the mode switch to the sample-and-hold circuit, the sample-and-hold circuit is connected to the voltage-dividing discharge E-Δ circuit and the reference comparison circuit, and the voltage-dividing discharge E-Δ circuit and the reference comparison circuit are connected to the calculation trigger output circuit Connection, the calculation trigger output circuit is connected with the set voltage divider resistor, the set voltage divider resistor is connected wi...

Embodiment 2

[0040] refer to Figure 1-2 , a digital implementation method for sampling the high-side IGBT temperature and the bus voltage of the motor controller, including the following steps:

[0041] S1: Ready mode switch, sample and hold circuit, voltage divider discharge E-Δ circuit and reference comparison circuit, calculation trigger output circuit, set voltage divider resistor, delay circuit, two frequency divider circuit, square wave timing circuit, square wave divider frequency setting control, and at the same time connect the mode switch to the sample-and-hold circuit, the sample-and-hold circuit is connected to the voltage-dividing discharge E-Δ circuit and the reference comparison circuit, and the voltage-dividing discharge E-Δ circuit and the reference comparison circuit are connected to the calculation trigger output circuit Connection, the calculation trigger output circuit is connected with the set voltage divider resistor, the set voltage divider resistor is connected wi...

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Abstract

The invention belongs to the technical field of high-side temperature measurement and voltage digital sampling of a motor controller of an electric vehicle, particularly relates to a digital implementation method for high-side IGBT temperature and bus voltage sampling of a motor controller, and aims to solve the problems that in the prior art, due to the fact that an IGBT junction temperature and bus voltage sampling scheme, accurate voltage and temperature cannot be really obtained, and meanwhile, the consistency of each controller and the effect of improving the overall performance cannot be ensured. According to the invention, the method comprises the following steps: S1, preparing a mode switch, a sampling hold circuit, a voltage division discharge E-delta circuit, a reference comparison circuit, a calculation trigger output circuit, a setting voltage division resistor, a time delay circuit, a frequency-halving circuit, a square wave timing circuit and a square wave frequency division setting control, and connecting the mode switch with the sampling hold circuit. According to the invention, the temperature and voltage of the high-side IGBT of the motor controller can be accurately sampled, so that the use safety and stability of the electric vehicle can be ensured.

Description

technical field [0001] The invention relates to the technical field of high-side temperature measurement and voltage digital sampling of an electric vehicle motor controller, in particular to a digital implementation method for high-side IGBT temperature and bus voltage sampling of the motor controller. Background technique [0002] At present, the existing technology adopts the scheme of voltage dividing resistor and linear isolation optocoupler. Usually, one optocoupler can only sample one input signal. The price of linear optocoupler is relatively expensive, and the reliability of optocoupler is relatively poor. In addition, the linear optocoupler The functional safety level is relatively low. The accuracy range that can be controlled now is 2%, and there is a certain uncertainty that will inevitably affect the accuracy of torque control, the accuracy of junction temperature sampling or reduce the overall output efficiency of the controller, and accurately implement the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/24215
Inventor 刘丽丽
Owner 刘丽丽
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