Supercharge Your Innovation With Domain-Expert AI Agents!

Active short-circuit signal processing circuit and vehicle

A signal processing circuit, active short-circuit technology, applied in electric vehicles, vehicle components, vehicle energy storage and other directions, can solve problems such as the inability to achieve active short-circuit, the inability of the IGBT driver chip to output control signals, and the inability to guarantee the IGBT driver chip. The effect of slowing down and avoiding accidents

Active Publication Date: 2021-09-17
CHINA FIRST AUTOMOBILE
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the low-voltage domain of the IGBT driver chip is out of control (such as abnormal low-voltage power supply), there is no guarantee that the high side of the IGBT driver chip can control the IGBT to work in the desired state, and the IGBT driver chip cannot output reliable control signals. Realize active short circuit function

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Active short-circuit signal processing circuit and vehicle
  • Active short-circuit signal processing circuit and vehicle
  • Active short-circuit signal processing circuit and vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] figure 1 The schematic diagram of the functional module of the active short-circuit signal processing circuit provided by Embodiment 1 of the present invention, this embodiment can be applied to the normal or abnormal operation of the low-voltage domain, refer to figure 1, the active short circuit signal processing circuit includes: an optocoupler drive circuit 101, a high and low voltage isolation circuit 102, a filter circuit 103, a diagnostic circuit 104, and a drive circuit 105;

[0052] The optocoupler drive circuit 101 includes an input terminal, an output terminal, and a power supply terminal. The input terminal of the optocoupler drive circuit 101 is connected to the active short-circuit signal 201 output from the low-voltage domain, and the power supply terminal of the optocoupler drive circuit 101 is connected to the logic power supply voltage of the low-voltage domain;

[0053] The high and low voltage isolation circuit 102 includes an input terminal, an outp...

Embodiment 2

[0059] On the basis of the above examples, refer to figure 2 , figure 2 It is a schematic diagram of an optocoupler driving circuit provided in Embodiment 2 of the present invention. The optocoupler driving circuit 101 includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1 and a first MOS transistor D1; A resistor R1 is connected between the input terminal of the optocoupler drive circuit 101 and the gate of the first MOS transistor D1; the second resistor R2 is connected between the gate of the first MOS transistor D1 and the first pole; the first capacitor C1 The first pole of the first capacitor C1 is connected to the first terminal of the first resistor R1, the second pole of the first capacitor C1 is connected to the first ground terminal; the first pole of the first MOS transistor D1 is connected to the first ground terminal, and the second pole of the first MOS transistor D1 The two poles are connected to the output terminal of ...

Embodiment 3

[0087] A vehicle comprising the active short-circuit signal processing circuit described in any embodiment of the present invention.

[0088] The main idea of ​​the present invention is to transmit the PWM-type active short-circuit signal 201 representing the normal operation of the low-voltage domain control module through the devices in the high-voltage and low-voltage isolation circuit 102, and adjust it through the filter circuit 103 into a signal that can be used for diagnosis by the diagnostic circuit 104. The diagnosis result 207 is adjusted into a driving signal through the driving circuit 105, which facilitates driving control. For high and low voltage isolation processing, the active short circuit signal 201 in the low voltage domain can directly act on the high voltage domain after the signal processing of the present invention. It is not affected by low-voltage power supply and has higher safety. The circuit involved in the present invention is a pure hardware cir...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an active short circuit signal processing circuit and a vehicle. The active short-circuit signal processing circuit comprises an optocoupler drive circuit, a high-low voltage isolation circuit, a filter circuit, a diagnosis circuit and a driving circuit. The input end of the optocoupler drive circuit is connected with an active short circuit signal output by a low-voltage domain, the input end of the high-low voltage isolation circuit is connected with the output end of the optocoupler drive circuit, the input end of the filter circuit is connected with the output end of the high-low voltage isolation circuit, and the input end of the diagnosis circuit is connected with the output end of the filter circuit. The input end of the driving circuit is connected with the output end of the diagnosis circuit, and the output end of the driving circuit is connected with the bridge driving chip and used for outputting a driving signal corresponding to the control signal output by the diagnosis circuit. According to the invention, through a hardware circuit constructed by external discrete devices and optocouplers, reliable control signals can still be effectively output under the condition of abnormal work (including abnormal power supply) in a low-voltage domain, and an active short-circuit function is realized.

Description

technical field [0001] Embodiments of the present invention relate to new energy vehicle power motor braking technology, in particular to an active short-circuit signal processing circuit and a vehicle. Background technique [0002] The function of the new energy electric vehicle electric drive controller is to convert the DC of the power battery into three-phase AC by controlling the switch of the IGBT (Insulated Gate Bipolar Transistor), and drive the permanent magnet synchronous motor to output controllable speed and torque to drive the vehicle. The power motor is the power source of new energy vehicles, and the motor will have a serious impact on human life and safety when it is out of control. The active short-circuit function is a control method to maintain the motor in a safe state when a low-voltage fault occurs. It can ensure that when the whole vehicle is out of control, the three-phase lower bridge of the IGBT is turned on at the same time, and the three-phase up...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00B60R16/02
CPCB60L3/00B60R16/02Y02T10/72
Inventor 廖波王泽尉甘棣元王强赵目龙吴茜王祎帆
Owner CHINA FIRST AUTOMOBILE
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com