Pressure fluctuation decreases with increasing accumulator volume and switching frequency .

压力波动随蓄能器 容积增大而降低；随换向阀 换向频率增高而下降。

This new DC motor is commutated by applied mechanical commutator and circuit composed by diode and capacitance which deleted the commutating devices such as the commutating magnetic pole the volume and weight of the motor is reduced the switching spark is eliminated effectively .

该新型电机采用机械换向器结合二极管续流和阻容吸收电路进行换向，不需要换向极等换向设备，减小了电机的 体积和重量，且能有效消除 换向火花。

In order to decreases the volume and the weight of Switching Mode Power Supply ( SMPS ) the power switches work into the state of quickly turn on and quickly turn off switching mode .

为了降低 开关电源的 体积和重量，必须使开关器件高速开通和关断，而与之共生的是开关损耗的增加。

Since high-frequency switching power supply has great advantages in weight volume and efficiency than linear power . Therefore high-frequency switching power supply was widely used in many fields .

由于高频开关 电源在重量、 体积和效率等方面是线性电源无可比拟的，因此在众多领域中得到广泛应用。

But volume gains are partially offset by margin contraction the result of lower interest rates and savers switching into higher-yielding time deposits .

但贷 款额的增长在部分程度上被息差收缩抵消，息差收缩是由利率降低和储蓄者 转向收益较高的定期存款所致。

The volume of the output filter can be reduced greatly used in cascade inverter with carrier-phase-shifted SPWM technology which has a high equivalent switching frequency and a good output sine wave . It is the base of the high power density of ASI .

载波移相正弦脉宽调制技术有独特的消谐波优势，其等效 开关频率高，输出波形正弦度好，可以大幅减小滤波器 体积，为实现系统的高功率密度奠定基础。

Simulation and experiment show that the input filter designed according to the given methods has the merits such as small volume light weight low loss low resonant peaking and high attenuation speed and has important application value on switching conversions .

仿真和实验表明，按该方法设计的输入滤波器，具有 体积小、重量轻、损耗低、谐振峰值低及衰减速率快等优点，在 开关 变换 器场合具有重要应用价值。

Especially in switching power supply the property operability volume and quality will be improved . Furthermore the conversion efficiency of the switching power supply is also the focus of the pursuit .

在开关电源方面尤为突出，其不仅在性能、操作性、 体积与质量等方面需要不断完善提高，而且 开关电源的高转换效率也是人们一直重点追求的目标。

Magnetic devices capacitors and radiators take up most of the volume of high-voltage DC power supply . The volume of magnetic devices and capacitors decreases when the switching frequency increases while the volume of radiators will increase because of the loss of the semiconductor switching devices .

大功率电源中磁性器件、电容器以及散热器占了大部分体积，提升 开关频率可减小磁性器件以及电容器的 体积，但会增加开关损耗，增大散热器的体积。

Considering from realization resonant converter has the advantage of higher operation frequency lower switching loss wider range of input voltage higher efficiency lighter weight smaller volume smaller EMI lower switching stress to PWM converter .

从实现上来说，谐振变换器相对PWM变换器，具有开关工作频率高、开关损耗小、允许输入电压范围宽、效率高、重量轻、 体积小、EMI噪声小、 开关应力小等优点。

Distributed switch to meet the backup volume real-time backup data smoothing when the standby switching high reliability requirements .

从而满足分布式 交换机 打包同步备份、即时同步备份、备用板接替主控板时数据数据一致性 检查等高可靠性要求。

The explosive growth of the telecom service volume demands for increasingly higher network transmission speed and switching capacity .

通信业务 量的爆炸式增长，要求不断提高网络的传输速度和 交换容量。

The study shows that the pressure stability is mainly related with the accumulator volume switching frequency of the directional control valve and the orifice diameter .

研究表明，增压系统的压力稳定性主要与蓄能器的 容积、换向阀的 换向频率和喷嘴的直径有关。

High power factor of inverter small volume of boost inductor and high efficiency are obtained due to a boost switching frequency of 2 kHz and a fixed triggering angle of the inverter .

由于升压 开关频率为2kHz，逆变触发角固定，使得装置具有逆变功率因数高、升压电感 体积小、效率高等优点。