From the simulated results,the stability of the designed monolithic Buck converter with different input voltage or different load is well,the line regulation is-40 dB and the load regulation is-60 dB.The average output voltage ripple of 75 mV and the power efficiency of 71% are achieved.
System control mode is simple,using input current limiting technique to keep output voltage ripple below 50 mV,adopting multi-topology switch-capacitor array and gain hopping to obtain the average efficiency above 60% and peak efficiency above 85%.
It introduces the operational principle and main characteristics of NCP1205.NCP1205 is applied to the interleaving paralleled backward circuit to reduce the switch tube power loss and output voltage ripple,to enhense the circuit efficiency.
It is concluded that an output current up to 1 A, an efficiency better than 75% and an output voltage ripple less than 20 mV has been achieved for this topology. Furthermore, it features high power density and is easy for integration.
结果表明，该结构的输出电流可达 1 A 以上，效率优于 75 ％ ，输出电压纹波小于 20 m V，具有高功率密度、便于集成等优点。
As far as the choice of the 1C is concerned, the PFC and PWM controller combo that is popular at the present time is chosen, because it can simplify designs and being synchronized trigger mode adopted, it can make peak to peak ripple voltage much small even on the condition of small capacitance.
Combining PWM with frequency control, this circuit can easily realize wide-range output voltage regulation(45-700 V), solve narrow output voltage of PWM control, reducing switch frequency variety and ripple of output voltage.
Analysis of DC output voltage ripple in an electromagnetic doubly salient brushless DC generator
The influence of the exciting current and armature reaction on the DC voltage ripple of the generator is discussed in detail, and the nonlinear rules are gained that DC voltage ripple changes accordingly.
Consequently, it can provide a steady DC output voltage with a low voltage ripple, approximately unitary input power factor and 2.5 kW output power.
If a fast voltage compensator is applied to control the DC output voltage, the DC output voltage ripple, pulsating at twice the grid frequency, causes a third harmonic of considerable magnitude in the line current.
It has been generally expected that, as X-ray tube-voltage ripple increases, the X-ray spectrum shifts to the low photon-energy side, and therefore the mean energy decreases, i.e.
The voltage fluctuation amplitude measured in terms of the magnetic field induction units amounts to 25 × 10-9 T at the transducer output.
Angular dependence of the current-voltage characteristics and voltage fluctuation spectrum in ceramic superconductors
The value of the decoupling capacitor can be selected depending on the tolerable amount of the steady-state voltage fluctuation.
Deconvolution yields the relaxation time but fluctuations in pulse duration increase the root-mean-square voltage fluctuation at the output of the detector system and limit the accuracy with which the relaxation time can be calculated.
When a direct current of, say, 20 mA flows through an electrical contact, a voltage fluctuation of e.g.
This paper presents a new topology DC-to-DC converter according to the principle of duality. It is of a simple structure and high efficiency. Zero-output voltage ripple can be obtained under a certain condition. Theoretical analysis and experimental study showed the correctness of duality.
ln this paper,the formula for output vdtage、ripple voltage and ripples factor in the rectifier circuit with a fiflter capacitor is given. Using these formulas,we can design the rectifier circuit with a filter capacitor conveniently.
This paper deals with the unbalanced polyphase rectifier circuitS which may be encountered inpractice. The calculation Of the mean value of the rectifier voltage, the analysis of the rectifiervoltage waveform and the calculation of the voltage ripple factor are presented for unbalanced 3 -,6 - and 12 - phase bridge rectifier circuits separately.