TI TIDA－01421汽车有刷马达脉冲计数器参考设计

TI公司的TIDA-01421是用于无传感器位置测量的汽车有刷马达脉冲计数器参考设计,可配置用于许多DC马达解决方案,具有共模式输入范围宽-14V到80V,工作电压9-18V电池,工作脉冲频率范围100Hz-1.3kHz,马达最大电流+/-16A,和MSP430™ LaunchPad™开发板接口简单,是高精度测试解决方案.主要用在存储器座椅,电动车窗,侧镜,电梯门和电源箱.本文介绍了TIDA-01421主要特性,框图,和MSP-EXP430FR6989 LaunchPad™连接图以及电路图,材料清单和PCB设计图.
The demand to retain memory on the position of theseat, window, sliding door, mirror, lift-gate, and othersdriven by that motor has increased as small motorswithin the modern automotive vehicle continue toevolve. Existing solutions utilize multiple magneticsensors attached to the body of a motor to provide afeedback loop to the motor control module.
A sensorless approach provides redundancy forexisting solutions and, in some cases, removes therequirement for motors with sensors attached. Thesensorless approach has become increasingly popularthrough the implementation of an in-line, current-sense　signal-conditioning circuit. This design provides asolution that is easily modifiable for many automotivemotor systems that control position measurement.
Motor position memory is being applied in more areas of the automotive vehicle including configurationand comfort settings for different driver profiles as well as diagnostics for more efficient and smartercontrol of the motor. The demand for more cost-efficient and easily-configurable solutions for manydifferent motor types has increased. For example, the seats in a vehicle can feature many axes ofmovement and ergonomic adjustment all controlled by individual motors. Existing memory solutions forthese seats require motors with magnetic Hall-effect sensors plus the additional extra wiring for eachsensor. Sensorless position measurement reduces the requirement for this many sensors and wiring bysensing the in-line motor current at the seat control module itself.
A sensorless approach is possible ...