变换器

As a result,conventional switched capacitor have been limited to be used with a very small output current.

因此，传统的开关电容变换器只能使用在输出电流很小的场合。

The research on the parallel operation of power converters has become one of the hot issues in the field of power electronics.

电力电子变换器模块的并联技术现己成为电力电子领域的研究热点。

The research on the parallel operation of power conveners has become one of the hot issues in the field of power electronics.

电力电子变换器模块的并联技术现己成为电力电子领域的研究热点。

By using this method,9 switching states were ensured during a sampling period of the matrix converter,and the duration of each switching st...

实验结果表明，采用提出的空间矢量脉宽调制优化调节策略，不仅消除了输出电压中的错误脉冲，而且降低了输出电压的总谐波畸变率，在输出频率为15Hz时，THD降低约15%，有效地提高了矩阵式变换器的输出波形质量，保证了系统的安全可靠运行。

Sometimes it is difficult to predict and calculate the periodic orbit, so the chaotic control technology based on Washout filter is used to control chaotic phenomena of DC/DC converter.

针对上述不足，本文采用了Washout滤波器来控制DC/DC变换器中的混沌现象，仿真结果证明了该方法的有效性。

Simulation results show that the chaotic system can be controlled effectively in Buck power converter by this method. The method is still effective when there are parameter perturbation and noise.

数值仿真结果表明：该方法能有效地实现Buck功率变换器混沌系统的控制，系统在参数发生摄动和存在噪声的情况下，控制仍然有效。

A class of piecewise smooth maps with two border and three zones is derived to describe the dynamics of a current-programmed Buck converter operating in a discontinuous mode.

本文以不连续导通模式下的电流反馈型Buck变换器为例，推导出两个边界三段形式的分段光滑系统的离散映射模型。

Because of switching actions, power-factor- correction Boost converters are essentially piecewise smooth nonlinear systems, which leads to the occurrence of fast-scale bifurcations.

由于开关的动作，功率因数校正(power-factor-correc- tion，PFC) Boost变换器本质上是分段光滑的非线性系统，从而导致快时标分岔的产生。

The unified discrete iterative map model of peak current and valley current controlled buck, boost, and buck-boost converters is established, and the unified piecewise smooth iterative map and their corresponding characteristics equations are also derived.

本文建立了峰值电流和谷值电流控制Buck，Boost，及Buck-Boost变换器的统一离散迭代映射模型，并导出了统一的分段光滑迭代映射方程及特征值方程，通过数值仿真得到了占空比变化时的正、逆分岔图和Lyapunov指数谱。

High power density as well as high reliability has always been the goal to pursue in the field of moden electric power converters, Power Factor Correction and two transistor forward provide an effective way.

高功率密度、高可靠性和高稳定性是现代电力电子功率变换器不断追求的目标，功率因数校正和双管正激技术为此提供了有效的方法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。