Active-capacitor frequency compensation strategy with push–pull charging ability is employed to reduce on-chip compensation cap without degrading loop stability at light …
Active-capacitor frequency compensation strategy with push–pull charging ability is employed to reduce on-chip compensation cap without degrading loop stability at light …
New Energy Sources WhatsAppSubmodule (SM) capacitor is one of the critical components in modular multilevel converter (MMC) and will gradually age with the working time increasing, which brings potential challenges for the systems reliability. This article proposes a novel online submodule capacitance monitoring scheme. Under normal conditions, the estimated capacitor …
New Energy Sources WhatsAppWith the development of portable electronic products, the requirement for chargers is also getting higher. In this paper, a high-accuracy constant output current/constant output voltage (CC/CV) ac-dc flyback converter is proposed and a novel cable compensation method without external capacitor is put forward. The converter …
New Energy Sources WhatsAppA more robust compensation scheme is, thus, needed for the dc-split capacitor circuit, as proposed and tested experimentally in the paper. Published in: IEEE Transactions on Power Electronics ( Volume: 32, Issue: 11, November 2017 )
New Energy Sources WhatsAppThe second harmonic current compensator (SHCC) can be added into the single-phase converters for compensating the second harmonic current (SHC) and thus removing the undesired electrolytic capacitor. In this paper, a virtual impedance, which is in the form of a capacitor and a resistor connected in parallel, is introduced to be in parallel at the bus …
New Energy Sources WhatsAppThe proposed method starts with the addition of a pole—zero pair as in [1 Il and proceeds toward eliminating the pole from the pole—zero pair. To introduce capacitive feedback, a …
New Energy Sources WhatsAppThis paper proposes an adaptive compensation scheme for buck converters with ripple-based constant on-time control in order to eliminate the sub-harmonic oscillation by reducing the required compensation and adapting the amplitude of the compensation ramp according to feedback of off-time difference. This paper …
New Energy Sources WhatsAppThis brief presents a single-capacitor active-feedback compensation (SCAFC) scheme for three-stage internal amplifiers driving small capacitive loads. The proposed SCAFC scheme can stabilize the three-stage amplifier by using only a single small-value compensation capacitor, thereby significantly reducing the amplifier …
New Energy Sources WhatsAppAbstract: A multistage operational transconductance amplifier with a feedforward compensation scheme which does not use Miller capacitors is introduced. …
New Energy Sources WhatsAppDynamic Capacitor Compensation scheme (DCC), driven by the dynamic tri-loop tracking controller. Wind 111 Wind nrbine 1.M 600 LVA 1.6 kV - 7 Figure 1 Sampled 600 kVA Wind Energy Scheme Diagram
New Energy Sources WhatsAppA stable low dropout (LDO) voltage regulator topology for low equivalent series resistance (ESR) capacitive loads is presented. The proposed scheme generates a zero internally instead of relying on the zero generated by the load capacitor and its ESR combination for stability. It is demonstrated that this scheme realizes robust frequency …
New Energy Sources WhatsAppThyristor-controlled series capacitors (TCSCs) introduces a number of important benefits in the application of series compensation such as, elimination of sub-synchronous resonance (SSR) risk, damping of active power oscillations, post …
New Energy Sources WhatsAppThis paper presents a novel frequency compensation scheme for the stability of low dropout regulator (LDO). The proposed compensation scheme introduces a zero in the voltage regulation loop to enlarge gain and phase margin at high-frequencies. As a result, high ...
New Energy Sources WhatsAppcapacitor charge compensation. Section 3 presents the simu-lation and experimental results. 2 Analysis and design of the proposed switched capacitor charge compensation 2.1 Principle of the proposed scheme Figure 2 illustrates the switched capacitor C''s
New Energy Sources WhatsAppA capacitor-free control scheme is presented for primary-side regulation (PSR) flyback converter to reduce cost and increase system reliability and the stability of the system makes significant strides especially under light loads. A capacitor-free control scheme is presented for primary-side regulation (PSR) flyback converter to reduce cost …
New Energy Sources WhatsAppIt is demonstrated that this scheme realizes robust frequency compensation, facilitates the use of multilayer ceramic capacitors for the load of LDO …
New Energy Sources WhatsAppThis paper presents a new method to measure the voltage across the submodule (SM) capacitors in a modular multilevel converter (MMC). The proposed technique requires only one voltage sensor per arm. This reduces the number of sensors required compared with conventional sensor-based methods. Therefore, the cost and …
New Energy Sources WhatsAppA No-Capacitor FeedForward (NCFF) compensation which uses pole-zero cancellation to obtain high gain, high GBW and a good phase margin is proposed. Left half plane (LHP) zeros produced due to the feedforward path cause a +90/spl deg/ shift in the phase and are used to cancel the -90/spl deg/ shifts in the phase caused by the poles. A fully differential …
New Energy Sources WhatsAppA multistage operational transconductance amplifier with a feedforward compensation scheme which does not use Miller capacitors is introduced. The compensation scheme uses the positive phase shift of left-half-plane (LHP) zeroes caused by the feedforward path to cancel the negative phase shift of poles to achieve a good phase margin. A two-stage …
New Energy Sources WhatsAppAlso, some FACTS components increase the efficiency of the general system. For example, a DC green plug FACTS system which is includes switched capacitor compensated shame, is proposed with a ...
New Energy Sources WhatsAppNovel switched-capacitor stages which are free from the effects of op-amp DC offset voltage are described. The op-amps used in the stage need not slew between the desired output voltage and the offset voltage as in previously described offset-free circuits. The use of the new scheme in general applications is also discussed.
New Energy Sources WhatsAppAlso the proposed compensation scheme allows a wide range of ESR from equivalent 0 Omega to 20 Omega and load capacitor from 0.47 muF to 22 muF with a load current of 0 muA to 100 mA at dropout voltage of 0.2 V.
New Energy Sources WhatsAppThyristor-controlled series capacitors (TCSCs) introduces a number of important benefits in the application of series compensation such as, elimination of sub …
New Energy Sources WhatsAppIn this paper, we propose a novel compensation scheme that extends the ESR stable range down to zero in full load current range and call it as zero-ESR compensation.
New Energy Sources WhatsAppAN2653 Stability basics 5/22 Figure 6. Impact of closed loop gain on stability Another parameter that impacts stability is the amplifier output impedance Zo cluding this parameter in the model of the amplifier leads to the model shown in Figure 7. Zo is neither constant over frequency nor purely resistive. ...
New Energy Sources WhatsAppA novel control scheme for a high power factor (PF) Buck LED driver with a reduced compensation capacitor is proposed in this article. The proposed control scheme is composed of a novel output current estimation circuit based on an accumulator and a novel adaptive compensation circuit with a half-line-cycle step control. The …
New Energy Sources WhatsAppThis paper presents a novel frequency compensation scheme for the stability of low dropout regulator (LDO). The proposed compensation scheme introduces a zero in the voltage regulation loop to enlarge gain and phase margin at high‐frequencies. As a result, high open‐loop‐gain and improved load regulation performances are achieved, …
New Energy Sources WhatsAppThis article presents an area-efficient and fast-transient capless low-dropout regulator (LDO) with satisfactory static and dynamic performance in the full load current range. Active-capacitor frequency compensation strategy with push–pull charging ability is employed to reduce on-chip compensation cap without degrading loop stability at light …
New Energy Sources WhatsAppA stable low dropout (LDO) voltage regulator topology for low equivalent series resistance (ESR) capacitive loads is presented. The proposed scheme generates a zero internally instead of relying on the zero generated by the load capacitor and its ESR …
New Energy Sources WhatsAppA capacitor-free control scheme is presented for primary-side regulation (PSR) flyback converter to reduce cost and increase system reliability. Compared to con A Capacitor-Free Control Scheme for a Primary-Side Controlled Flyback Converter
New Energy Sources WhatsAppThis paper presents a novel frequency compensation scheme for the stability of low dropout regulator (LDO). The proposed compensation scheme …
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