Ignition signal wake-up loop for motor controller and control method

Abstract

The invention discloses an ignition signal wake-up loop for a motor controller and a control method. The loop includes a KL15 ignition end and a CAN ignition end. The two ignition ends are connected to a base of a transistor Q1 through diodes D2 and D1 respectively, and a collector of the transistor Q1 is connected with a grid of a P-type MOS transistor Q2 sequentially through a resistor R6 and adiode D5 which are in series connection, a source and a drain of the MOS transistor Q2 are connected with a main power supply and a controlled power supply respectively, and when the MOS transistor Q2is connected, the controlled power supply of a controller starts to operate, to achieve the purpose of waking up the controller. An optocoupler U1 primary is connected through an ignition 2, a 4-pinignition of the optocoupler U1 monitors changes of level, and an MCU detects the changes and then controls the level of a pin 2 of U2; at the same time pins 3 and 4 of the U2 are connected, and the MCU in the controller can monitor a KL15 rigid line wake-up signal in real time. According to the ignition signal wake-up loop for the motor controller and the control method, a related CAN message wake-up mode is added and serves as a redundant design of the KL15 rigid line wake-up wake-up mode, ensuring that the controller can respond to the requirements of a complete vehicle in real time.

Description

technical field [0001] The invention relates to new energy vehicles, in particular to an ignition signal wake-up loop of a motor controller and a control method. Background technique [0002] Existing new energy vehicles often encounter abnormalities in the wiring harness between the vehicle and the motor controller, especially when the KL15 hard wire is broken, and the relevant wake-up signal generated by the ignition coil of the vehicle cannot wake up the controller. The wake-up schemes of the prior art have the following disadvantages: [0003] (1) The wake-up signal loop is considered from the perspective of the vehicle system, and the wake-up signal loop is not explained from the perspective of components, and how the component motor controller cooperates with the vehicle to monitor the wake-up state to improve the safety performance of the vehicle; [0004] (2) More components are used, which increases the hardware cost; [0005] (3) It is unlikely that it can be use...

AI Technical Summary

Problems solved by technology

[0003] (1) The wake-up signal loop is considered from the perspective of the vehicle system, and the wake-up signal loop is not explained from the perspective of components, and how the component motor controller cooperates with the vehicle to monitor the wake-up state to improve the safety performance of the vehicle;

[0004] (2) More components are used, which increases the hardware cost;

[0005] (3) It is unlikely that it can be used as a reference, and it cannot be used in parts;

[0006] (4) Mainly the layout of the electrical system forms a wake-up loop and cannot realize the circuit design scheme

[0010] The patent considers the wake-up of the ignition signal from the perspective of the whole vehicle, and does not introduce how to distinguish between the two wake-up methods, and how different wake-up modes work, and does not describe how the parts work with the whole vehicle.

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