| 直流脉宽调速系统电流脉动规律分析 |
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| 引用本文： | 柏艳红,李虹,孙志毅. 直流脉宽调速系统电流脉动规律分析[J]. 电气电子教学学报, 2010, 32(2): 35-38,103 |
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| 作者姓名： | 柏艳红 李虹 孙志毅 |
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| 作者单位： | 太原科技大学,自动化系,山西,太原,030024;太原科技大学,自动化系,山西,太原,030024;太原科技大学,自动化系,山西,太原,030024 |
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| 基金项目： | 山西省高校科技研究开发项目(2007141) |
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| 摘 要： | 本文在研究直流脉宽调速系统的电流脉动规律中，推导了PWM变换器处于不同工作状态时电流动态过程的统一表达式；分析了电动机在不同运行状态下的电流波形，给出了电动运行状态和降速过程的转速、电枢电流和电压的响应曲线；得出了无论电动机处于电动还是制动状态，在一个开关周期内，电枢电压在电源电压和零电压间切换，电流动态过程包括电流上升和下降两段，都遵循所推导出的电流表达式。笔者通过仿真，研究了PWM信号的占空比、开关周期和电磁时间常数等参数对电流脉动幅值的影响。
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| 关 键 词： | 直流脉宽调速系统 PWM变换器 电流脉动 仿真 |
The Laws of the Current Ripple in DC Motor PWM Speed Regulating System |
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| BAI Yan-hong,LI Hong,SUN Zhi-yi. The Laws of the Current Ripple in DC Motor PWM Speed Regulating System[J]. Journal of Electrical & Electronic Engineering Education, 2010, 32(2): 35-38,103 |
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| Authors: | BAI Yan-hong LI Hong SUN Zhi-yi |
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| Affiliation: | Department of Automation;Taiyuan University of Science and Technology;Taiyuan 030024;China |
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| Abstract: | In this paper,the laws of the current ripple in DC motor PWM speed regulating system are studied.An expression of the current dynamics which can be used in different working states of the DC-DC PWM converter is deduced.The current waveforms are analyzed under different operating conditions of the motor.And the dynamic response curves of speed,armature current and voltage are provided in motoring state and in speed decreasing process.The conclusion that the current dynamic processes during a switching period... |
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| Keywords: | DC motor PWM speed regulating system PWM converter current ripple simulation |
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