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In this paper, a novel current sharing control strategy, named module link, is used to realize multiple modules paralleled. To achieve this goal, there are three full-bridge phase-shift converters are used as three modules and connected in parallel to feed the load. In this study, three phase-shift control integrated circuits, named UCC28950 made by Texas Instruments Co., are used to control individual...
This paper presents a new power supply consisting of an inverter and a power factor correcting stage with an integrated active energy storage for servo drives. The energy storage is realized with a capacitor and a DC-DC-converter. This enables the power supply to reuse the braking energy of servo drives instead of losing it in a braking chopper resistor. The main advantage is the simple integration...
The paper describes schemes to stabilize of the output voltage of the high-voltage power supplies for the powerful traveling wave tubes. It is shown that the considered schemes provide the reliable power supply of the delay system of the traveling wave tube in complementary sets of load conditions and conditions of changing parameters of the mains. However, none of these schemes provides the reliable...
An interleaved boost power-factor corrector (PFC) with average current control is studied in this paper. It comprises two interleaved boost circuits connected in parallel and operated with average current control. The interleaved operation reduces the input current and output current ripples and also improves the circuit efficiency at light load condition. This paper analyzes the interleaved PFC pre-regulator...
The article introduces an innovative PWM current-mode technique to control the switched-mode power supplies for regulating the output of the power supply. The proposed technique can be used to control the most common offline power supply topologies and to control any dc-dc converter. Using the new methodology, it is possible to greatly simplify the internal architecture of any integrated IC controller,...
This paper presents a galvanically isolated gate driver system for medium voltage SiC-MOSFETs. A low common mode coupling capacity of 1 pF and good electrical insulation of the gate driver power supply are achieved by using a current-loop AC-bus power supply. The power semiconductor is protected against unintentional self-turn-on by a low resistance gate path that is active while the gate driver is...
This paper presents an isolated power supply unit for high-side gate driver. It generates a bipolar voltage level (+15V/-5V) and an auxiliary voltage level of +5V. The LLC topology is used at fixed frequency of 5MHz. A voltage control based on switched resonant tank is used to compensate voltage drops in the converter at high load currents. This new control strategy allows using a simple feedback...
For an electron beam additive manufacturing advanced manufacturing technology, the paper researched one new pulsed high energy beam technology and developed a pulsed high energy beam power supply, including accelerating power supply, heating power supply and pulsed bias power supply main circuit topologies and the corresponding control circuits, and the power supply can realize continuous beam current...
This paper presents a method to analyze the dynamic physical limits of a phase-shifted full bridge (PSFB) circuit used for the power supply of Magnetic Resonance Imaging (MRI) gradient amplifiers. Based on the time-optimal control theory, the detailed optimal transient response process under a sudden load current change is analyzed considering the sample time delay, the minimum voltage undershoot...
A modular interleaving power cell system for input voltage range of 19–265 V DC or AC consists of 15 or 6 Watts cells, operates at fixed frequency. A boost stage providing PFC, and an isolating regenerative snubber fly-back stage delivering 30 V DC at the output is combined.
The design of a solid-state high voltage modulator has been developed that uses series-connected insulated-gate bipolar transistors (IGBTs) to control the output voltage. Although having many potential applications, this high voltage modulator was designed to meet, at a minimum, the requirements of one of the power supplies required for depressed collector gyrotrons being used in electron cyclotron...
We designed a high voltage power supply to to drive a magnetron injection gun. This high voltage power supply needs the output voltage of −40 kV for few seconds continuously. The required output power rate is 280 kW. It also have to be designed for the rise and fall time to be less than 1 ms with the ripple stability of output voltage of lower than 1%. To satisfy the requirements, we used eight high...
The article introduces an off-line power supply, using the ALTAIR05T-800, an innovative all-primary controller, by STMicroelectronics. Using the proprietary patented all-primary sensing feedback technique, the IC is capable of providing accurate output voltage regulation and tight output current regulation, thus eliminating the need for any secondary side component. The proposed power supply is able...
A principal scheme of the secondary power source for LEDs with control by the average current and protection of over-voltage, over-current and over-temperature. Simulations of the destructive effects are made using OrCAD software tool. Algorithm of power key control is proposed, in which maximum value of the filling coefficient of control signal pulse at the powering interval is limited and after...
Traveling Wave Tubes (TWTs) are extensively used in the satellite payloads as RF power transmitting amplifiers. TWT requires a highly sophisticated power supply; often known as High Voltage Electronic Power Conditioners (HV-EPC) in space community. Both the units put together make a Traveling Wave Tube Amplifier (TWTA). HVEPC is a regulated power supply used to provide conditioned and isolated voltage...
This paper proposes a new combined voltage and current control technique for a non-isolated DC-DC converter to meet the output requirements of capacitor charging power supplies for pulsed power applications. Low input voltage, simplicity of structure and control, over voltage and current protections are the salient features of the proposed topology.
Electronic Current Transformer (ECT) is an important equipment when constructing a major digital substation. The power supply of the ECT is intended solely for providing the DC power supply that could ensure the data collecting system's normal working. And which is the key way to ensure the reliability and accuracy of ECT. A new model of the power supply based on the characteristics of ECT is proposed:...
The special optimal powering requirements of semiconductor refrigeration were deeply analyzed from both the refrigeration principle aspect and the unique characteristics of thermoelectric cooling device's materials and fabrication processes. Accordingly, based on MPU, CPLD and PWM techniques, designed a programmed heavy power supply for driving semiconductor cooling chips. The detailed hardware and...
JAXA has researched the Super Low Altitude Test Satellite (SLATS) for next generation earth observing satellite. We started research and development of a new IES in order to apply for the SLATS program. In this paper, we describe the preliminary design results of the IES configuration plan for the SLATS, performance requirements of the power processing control unit (PPCU) and the developments results...
Digital control of a general-purpose switching power supply is one of the key technologies to perform the high reliability and the intelligent function demanded for the next generation. The contribution of this paper is the development of a digital control-based switching power supply with the ability to overcome future's requirements such as fault detection, life-time estimation and self recovery...
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