摘要
直流法通过逆变电路将直流电压转变为施加到被测磁件上的交流电压,测量直流输入的有功功率获取磁芯损耗,因此,能精确地测量不同的占空比矩形波激励下磁件损耗。为了能够精确地获得磁件损耗里的磁芯损耗,引入辅助空心电感与副边短路的磁件串联作为负载测量磁件的绕组损耗。建立了实验装置,且用傅立叶展开计算绕组损耗进行验证,最大相对误差为12.91%,其最大绝对误差为7.480 2 mW,验证了该法能够精确地测量矩形波激励下磁件损耗中的绕组损耗。
The basic idea of the DC meter method was to transform the input DC voltage into a PWM voltage exciting on the magnetic core by a DC/AC circuit, and the magnetic core losses were obtained by measuring the ac- tive power of input DC voltage. The DC meter method could measure the magnetic element losses under the rectan- gular wave excitation accurately. In order to separate the copper loss from the core loss, the air-core inductor was in- troduced as load. The experimental system was build at last, the measurement results were compared with the results which were calculated by Fourier transform,the maximum relatively error was 12.91%. The verification test was build to validate that the novel measurement method is accurate enough for practical applications.
出处
《南昌大学学报（工科版）》
CAS
2012年第3期279-282,共4页
Journal of Nanchang University(Engineering & Technology)
基金
国家自然科学基金资助项目(50877010)
福建省教育厅资助项目(JA11028)
关键词
绕组损耗
直流法
傅立叶展开
矩形波激励
copper loss
DC meter method
Fourier expansion of function
square wave excitation
