用于磁流变液体阻尼器的可控电流放大器

磁流变液体是最有发展前途的智能材料之一,具有良好的电控性和广泛应用前景。可控电流放大器在磁流变液体应用中起着调节磁场强度的作用,它的性能影响磁流变液体的快速反应速度。文中提出一种可调PWM(脉宽调制)闭环控制电流放大器,元器件少,成本低廉,调节容易,控制方便。不仅适用于磁流变液体磁场控制,还可用于许多电机、照明、电动执行机构和电加热器场合。闭环控制电流放大器由PWM芯片DRV103、闭环电流反馈电路和占空比信号电压线性变换3部分组成。给出了电路设计、调试方法和实验结果。

Controllable Current Amplifier for Magnetorheological Damper

Magnetorheological fluids have become known as "smart fluids"or intelligent materials.They have well-controlled properties and a great applicative expectation.This paper mainly focuses on the current amplifier,which is one of the important parts in any MR application system.The current amplifier consists of 3 parts: a PWM IC chip DRV103,a closed-loop current control circuit and a linear transform circuit of the duty cycle adjust voltage.The current amplifier has a few components.It is low in cost and easy to adjust.The paper describes the functions of the PWM IC chip and how to use it.The detailed circuitry of the current amplifier is explained and experimental results are discussed.