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PWM control signal self-locking protection circuit of electric automobile motor controller

A motor controller and control signal technology, applied in electric vehicles, logic circuits using semiconductor devices, logic circuits using specific components, etc., can solve the problems of high CPLD price, single product supply, and poor substitutability. Strong substitutability, mature supply, and the effect of reducing material costs

Pending Publication Date: 2017-02-08
王文杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing technology uses CPLD logic devices to diagnose and control the 6-way PWM output signals, uses CPLD embedded programs to implement protection logic, and analyzes and processes various protection inputs; Poor substitution

Method used

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  • PWM control signal self-locking protection circuit of electric automobile motor controller
  • PWM control signal self-locking protection circuit of electric automobile motor controller

Examples

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Embodiment 1

[0013] A PWM control signal self-locking protection circuit for an electric vehicle motor controller, including a first latch 10 composed of two NOR gates and a fault latch circuit 20, and the two PWM control signals are respectively connected to the first NAND An input terminal of the gate 201 and the second NAND gate 202, the first and second NAND gate output terminals are respectively connected to the two input terminals of the first latch 10;

[0014] The fault latch circuit 20 includes a second latch 203 and a third latch 204 respectively composed of two NAND gates, and the S terminals of the second and third latches are respectively connected to the first fault signal and the second fault signal, the R terminals of which are jointly connected to the unlocking signal output terminal; the forward outputs of the second and third latches are respectively connected to an input terminal of the third NAND gate 205 and the fourth NAND gate 206, Another input terminal of the thir...

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PUM

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Abstract

The invention discloses a PWM control signal self-locking protection circuit of an electric automobile motor controller, and relates to the technical field of new energy automobiles. The PWM control signal self-locking protection circuit is mainly composed of discrete digital logic chips such as NAND gates, NOR gates, latches formed by the NAND gates and the NOR gates and the like. Compared with a CPLD (Complex Programmable Logic Device) scheme, the material cost is greatly reduced; the digital logic chips are mature in supply and high in mutual substitutability; and input / output signals and time delay of each logic link are measurable, and circuit debugging is facilitated.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a PWM control signal self-locking protection circuit of a motor controller of an electric vehicle. Background technique [0002] By controlling the motor with PWM waves, the stepless speed regulation of the motor can be realized; three groups of 6-way PWM control signals are required to drive the three-phase motor, and each group of 2-way PWM control signals are complementary, and there is a certain dead zone, and the PWM control signal needs to be adjusted. Carry out self-locking protection. [0003] The existing technology uses CPLD logic devices to diagnose and control the 6-way PWM output signals, uses CPLD embedded programs to implement protection logic, and analyzes and processes various protection inputs; Substitution is poor. Contents of the invention [0004] In view of the above problems, the present invention provides a PWM control signal self-locking p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/003H03K19/08B60L3/00
CPCH03K19/003H03K19/0813B60L3/00
Inventor 王伟毅孙儒文王文杰
Owner 王文杰
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