一种电动车电机霍尔芯片静电浪涌损伤保护装置

Abstract

本申请涉及电路保护技术领域，提供一种电动车电机霍尔芯片静电浪涌损伤保护装置，包括输入电源、霍尔芯片A、贴片电阻一、贴片电阻二、贴片压敏电阻一、贴片压敏电阻四和霍尔信号输出模块，霍尔信号输出模块包括霍尔A信号输出单元，霍尔芯片A的电源端连接输入电源，接地端接地，信号输出端连接霍尔信号输出模块，输入电源通过贴片电阻一连接霍尔芯片A的电源端，并通过贴片压敏电阻四连接霍尔芯片A的接地端，贴片压敏电阻一的一端连接霍尔芯片A的接地端，另一端连接霍尔A信号输出单元，贴片电阻二一端连接霍尔芯片A的信号输出端，另一端连接霍尔A信号输出单元。本申请解决霍尔损坏后电机容易报废的问题，提高了产品的质量，减少了返修率。

Claims

1. An electrostatic surge damage protection device for a Hall chip of an electric vehicle motor, characterized by, The system includes an input power supply, a Hall effect chip A, surface mount resistors 1 and 2, surface mount varistors 1 and 4, and a Hall effect signal output module. The Hall effect signal output module includes a Hall effect A signal output unit. The power supply terminal of the Hall effect chip A is connected to the input power supply, its ground terminal is grounded, and its signal output terminal is connected to the Hall effect signal output module. The input power supply is connected to the power terminal of Hall chip A through the surface mount resistor one, and to the ground terminal of Hall chip A through the surface mount varistor four. The surface mount varistor four is used to discharge transient high voltage electrostatic discharge from the power input terminal to ground. One end of the surface-mount varistor is connected to the ground terminal of the Hall chip A, and the other end is connected to the Hall A signal output unit, used to discharge the transient high-voltage surge current at the signal output terminal to ground. One end of the surface mount resistor is connected to the signal output terminal of the Hall chip A, and the other end is connected to the Hall A signal output unit.

2. The electric vehicle motor Hall chip electrostatic surge damage protection device according to claim 1, characterized in that, It also includes Hall chip B, surface mount resistor three, and surface mount varistor two. The Hall signal output module includes a Hall B signal output unit. The input power supply is connected to the power supply terminal of Hall chip B through surface mount resistor one and to the ground terminal of Hall chip B through surface mount varistor four. One end of surface mount varistor two is connected to the ground terminal of Hall chip B and the other end is connected to the Hall B signal output unit. One end of surface mount resistor three is connected to the signal output terminal of Hall chip B and the other end is connected to the Hall B signal output unit.

3. The electrostatic surge damage protection device for electric vehicle motor Hall chip of claim 2, wherein, It also includes a Hall chip C, a surface mount resistor four, and a surface mount varistor three. The Hall signal output module includes a Hall C signal output unit. The input power supply is connected to the power supply terminal of the Hall chip C through the surface mount resistor one and to the ground terminal of the Hall chip C through the surface mount varistor four. One end of the surface mount varistor three is connected to the ground terminal of the Hall chip C, and the other end is connected to the Hall C signal output unit. One end of the surface mount resistor four is connected to the signal output terminal of the Hall chip C, and the other end is connected to the Hall C signal output unit.

4. The electrostatic surge damage protection device for Hall chip of electric vehicle motor according to any one of claims 1 to 3, characterized in that, The surface mount varistors 1, 2, 3 and 4 are all model CMS0805V180P121.

5. The electric vehicle motor Hall chip electrostatic surge damage protection device of claim 1, wherein, The resistance values ​​of the surface mount resistors 1, 2, 3, and 4 are all greater than or equal to 100 ohms and less than or equal to 1 kiloohm.

6. The electric vehicle motor Hall chip electrostatic surge damage protection device of claim 1, wherein, The maximum clamping voltage of the surface mount varistor 1 and surface mount varistor 4 is 35V.

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