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Brushless electric steering control unit and method based on functional safety design

A technology of electric steering and functional safety, which is applied in the direction of electric steering mechanism, power steering mechanism, steering mechanism, etc., can solve problems such as insufficient safety and driving danger, and achieve the effect of improving safety reliability and safety

Active Publication Date: 2017-07-14
浙江航驱汽车科技有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the existing brushless motor EPS control system has insufficient safety, and the actual operation process will cause driving danger due to system failure.

Method used

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  • Brushless electric steering control unit and method based on functional safety design

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Embodiment

[0035] Embodiment: A brushless electric steering control unit based on functional safety design, such as figure 1 As shown, it includes EPS controller 1, power redundant module 2, torque and angle signal sensor 4 and permanent magnet synchronous motor module 3, and the power redundant module includes power control module 21, power IC1 22, power IC2 23 and power IC3 24 , the EPS controller includes MCU1 11 and MCU212, MCU1 is also connected with MCU2, and MCU1 and MCU2 are also connected with EPS controller memory. The permanent magnet synchronous motor module includes a permanent magnet synchronous motor body 31 and a motor position sensor 32, the permanent magnet synchronous motor body is connected to the motor position sensor, the power control module is connected to the power supply IC1 and the power supply IC2 at the same time, and the power supply IC1 is connected to the MCU1. The power supply IC2 is connected with the torque and angle signal sensor and the motor position...

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Abstract

The invention discloses a brushless electric steering control unit based on functional safety design. The brushless electric steering control unit comprises an EPS controller, a power redundancy module, a torque and angle signal sensor and a permanent magnet synchronous motor module. The power redundancy module comprises a power control module, a power source IC1, a power source IC2 and a power source IC3. The EPS controller comprises an MCU1 and an MCU2. The permanent magnet synchronous motor module comprises a permanent magnet synchronous motor body and a motor position sensor which are connected with each other. The power control module is connected with the power source IC1 and the power source IC2 at the same time. The power source IC1 is connected with the MCU1. The power source IC2 is connected with the torque and angle signal sensor and the motor position sensor at the same time. The power source IC3 is connected with the MCU2. The power redundancy module can continuously keep the working power sources of the EPS control module in the high-speed driving process of a vehicle under the condition that a rigid line IG signal or a CAN IG signal is lost, and an EPS can continuously provide the assistance to enable the vehicle to run safely.

Description

technical field [0001] The invention relates to the field of automobile electric power steering systems, in particular to a brushless electric steering control unit and a control method based on functional safety design. Background technique [0002] As automobiles enter the era of intelligence, automobiles have higher and higher requirements for the controllability, safety and performance of electric steering systems. At this stage, brushed motor power steering systems used in various types of automobiles will gradually become unsuitable for future development needs. , it has insufficient power assistance, cannot integrate angle and torque control, and cannot meet the needs of future automatic driving. The brushless motor EPS with integrated angle and torque control has more advantages: [0003] 1. Brushless motor EPS adopts magnetic field commutation, no direct contact, low noise, long service life; good motor performance can meet the needs of large power-assisted models....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04
CPCB62D5/0463B62D5/0484
Inventor 邓健鲁海霞邓敏
Owner 浙江航驱汽车科技有限公司
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