1) symmetrical double power supply
对称双电源
1.
When the traditional method to gain symmetrical double power supply is used in designing the high-frequency switch power supply, it occurrs that the voltages of either ,the positive or the negative power supply, changes alternatively with the signal′ s positive or negative half period in a seesaw way.
在高频开关电源设计中借用传统的获取对称双电源的方法,会带来正负电源的电压随信号的正负半周交替变化而出现拉锯式上升与下降的现象。
2) balanced constant excitation
对称恒定电流源
3) three-phase symmetry load
三相对称电源
4) three-phase symmetrical current source
三相对称电流源
1.
In order to change the traditional measurement of reactance value of reactor,a method based on the PWM control can be carried out under the rated current in the impedance measurement,and is the three-phase symmetrical current source.
为了改变传统测量电抗器电抗值,介绍了一种基于PWM控制的方法,能够在额定电流下进行阻抗测量,且电源为三相对称电流源。
2.
In order to change the traditional measurement of reactance value of reactor,this paper presents a method based on the PWM control which can be carried out impedance measurement under the rated current,and the power is the three-phase symmetrical current source.
传统电抗器电抗值的测量方法为外加三相对称电压源的方法,而电抗器的设计是按三相对称电流源设计的,在实际运行中电抗器两端相当于外接一个对称三相电流源,因此,用传统的测量方法必定引起测量误差。
5) three-phase symmetrical voltage current
三相对称电压源
6) double asymmetrical bridge
双不对称电桥
1.
A new method of real-time supervision for insulation of DC system is adopted in this paper,which uses double asymmetrical bridge in normal mode.
为此提出了采用常态下利用双不对称电桥实时监测直流系统绝缘的新方法以解决上述问题。
补充资料：对称与非对称
反映客观事物在结构、功能、时空上的特殊联系的范畴。对称指事物以一定的中介进行某种变化时出现的不变性，非对称指事物以一定的中介进行某种变化时出现的可变性。在自然界中普遍存在，形式多样。对称有空间对称(包括形象对称和结构对称)、时间对称、概念对称等。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条