| 王 冰,蒋 磊,宋福明,徐 跃.30 kA 闭环式集成霍尔电流传感器设计[J].电子测量与仪器学报,2020,34(11):188-193 |
| 30 kA 闭环式集成霍尔电流传感器设计 |
| 30 kA closed-loop integrated Hall current sensor design |
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| DOI： |
| 中文关键词: 闭环集成式霍尔电流传感器 PWM 波 失调消除 功率放大 零磁通 |
| 英文关键词:closed-loop integrated Hall current sensor PWM wave offset cancellation power amplifier zero magnetic flux |
| 基金项目:江苏省重点研发计划-社会发展面上项目(BE2019741)、江苏省自然科学基金面上项目(BK20181390)、江苏省高校自然科学基金面上项目(18KJB140008)资助 |
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| 中文摘要: |
| 基于 0. 18 μm CMOS 工艺设计了一种大量程闭环式集成霍尔电流传感器。 采用片内高灵敏度霍尔器件检测待测电流
产生的磁场并线性输出霍尔信号,霍尔电压经过线性放大、失调消除和比例积分调节后与三角载波进行比较产生 PWM 波,驱
动全桥式功率放大电路工作。 功率放大电路输出的电流送入聚磁环的二次绕组后形成一个闭环的二次侧补偿,使聚磁环气隙
中的霍尔器件处于零磁通状态,从而提高了大电流检测的精度。 仿真结果表明,所设计的集成霍尔电流传感器的最大测量范围
为 30 kA,准确度为 1 级,功耗小于 1. 08 W,芯片面积仅有 0. 2 mm
2
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| 英文摘要: |
| A large-scale closed-loop integrated Hall current sensor is designed based on the 0. 18 μm CMOS technology. The on-chip
high-sensitivity Hall device is used to measure the magnetic field generated by the detected current and linearly output Hall signal. After
linear amplification, offset cancellation, and proportional integral ( PI) regulation, the Hall voltage is compared with the triangular
carrier to generate a PWM signal for driving the full-bridge power amplifier. The output current from the power amplifier is then sent to
the secondary winding of the magnetic ring to form a closed-loop secondary side compensation, so that the Hall device in the magnetic
ring air gap is in a zero magnetic flux state, thereby improving the accuracy of high current detection. Simulation results show that the
designed integrated Hall current sensor achieves a high measurement range of 30 kA, the high accuracy level of 1, the low power
consumption of 1. 08 W, and the low chip area occupation of 0. 2 mm
2
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