Stretch Meat Grinder: A Novel Circuit Topology for Reducing Opening Switch Voltage Stress

Sitzman, A.; Surls, D.; Mallick, J.

doi:10.1109/ppc.2005.300703

Cited by 69 publications

(17 citation statements)

References 6 publications

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“…The output current should peak at approximately 18 kA so that the system is roughly equivalent to the capacitive based power supply. Assuming a coupling of 0.9 and a load of 1 µH we used the theoretical analysis presented in [1] and circuit level simulations to arrive at approximant inductance values for L1 and L2. L1 should be greater then 150 µH and L2 should be less than 8 µH.…”

Section: Circuit Level Designmentioning

confidence: 99%

“…There were two major objectives for this project. The first objective was to demonstrate the Slow TRansfer of Energy Through Capacitive Hybrid (STRETCH) meat grinder principles [1] with a physical system. The second objective was to use the system to fire the demonstration railgun at the Institute for Advanced Technology (IAT).…”

Section: Introductionmentioning

confidence: 99%

“…Opening high-current inductors produces voltage across the opening switch that is in excess of the capabilities of present-generation solid-state. The STRETCH meat grinder circuit topology addresses this voltage stress and increases the amount of energy transferred to the load [1].…”

Section: Introductionmentioning

confidence: 99%

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Design, Construction, and Testing of an Inductive Pulsed-Power Supply for a Small Railgun

2007

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Abstract-Advances in high-power-density batteries have rekindled interest in using inductive store as a pulse compression system. Although these batteries are considered very power dense, they lack over an order of magnitude of power density to drive a deployable electric gun. However, one can add an inductive circuit to a battery bank to make a hybrid system that has a much higher power density than batteries alone. A battery-inductor hybrid pulsed-power supply boasts several advantages over pulsed alternators, as inductors are static and relatively easy to cool. Inductors are potentially more energy dense than capacitors, making a battery-inductor hybrid pulsed-power supply an attractive alternative to capacitor-based pulsed-power supplies. The opening switch has been a major obstacle in previous inductive store projects, but in simulation, a new circuit topology-the Slow TRansfer of Energy Through Capacitive Hybrid (STRETCH) meat grinder-greatly attenuates the problem. This paper discusses the design, construction and testing of a small-scale STRETCH meat grinder system designed which was successfully used to power a miniature railgun.

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Section: Circuit Level Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design, Construction, and Testing of an Inductive Pulsed-Power Supply for a Small Railgun

2007

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“…Therefore, the opening switch becomes one of the crucial factors of the inductive pulsed-power system, which will affect the amount of energy in each topology module and the scalability of the pulsed-power system [3]. Slow transfer of energy through capacitive hybrid (STRETCH) meat grinder that is presented by the Institute for Advanced Technology can reduce the voltage of the opening switch and raise the multiplication factor of the opening current [4]. However, it is limited by the breaking current ability of the integrated gate-commutated thyristor (IGCT), which is only with the order of 4 kA in current commercial market.…”

Section: Introductionmentioning

confidence: 99%

System Implementation and Testing of the STRETCH Meat Grinder With ICCOS

2015

IEEE Trans. Plasma Sci.

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By applying the principle of inverse current commutation with semiconductor (ICCOS) devices in a slow transfer of energy through capacitive hybrid (STRETCH) meat grinder system, a novel circuit topology called STRETCH meat grinder with ICCOS was proposed by the Tsinghua University in 2013. It can not only raise the amplitude of the opening current, but also reduce the cost of the STRETCH meat grinder circuit obviously by replacing the integrated gate-commutated thyristor (IGCT) with thyristor. This paper discusses the overall design, system implementation, and testing results of a STRETCH meat grinder with ICCOS system with roughly 1-kJ inductive energy. The load is a spiral coil with 1.4-m resistance and 1.4-μH inductance. With closed-loop control strategy, the system detects the charging current of the inductors. When it reaches the designated value, the triggering signal for ICCOS is delivered and after the predefined delay time, the triggering signal for discharging the voltage on the pulseforming capacitor is delivered. The current of the inductors and the load are measured by Rogowski coils. The opening current is 1 kA and the maximum load current is close to 4 kA. All the voltages on the switches are lower than 1 kV. The experimental results are consistent with the simulated ones, which verified the correctness of the theoretical analysis and proved the applicability of the STRETCH meat grinder with ICCOS for larger energy level.Index Terms-Experimental, inductive pulse power supplies, inverse current commutation with semiconductor (ICCOS) devices, slow transfer of energy through capacitive hybrid (STRETCH) meat grinder.

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“…For example, Slow TRansfer of Energy Through Capacitive Hybrid meat grinder principle [9], [10], Current Multiplier by Inductive Storage [11], [12], or an XRAM generator [8], [13]- [17]. The indispensable demand for the above principles is the highpower opening switches.…”

Section: Introductionmentioning

confidence: 99%

A 50 kJ Inductive–Capacitive Storage Module With Solid-State High-Power Opening Switch Based on Counter-Current Thyristor

Wang

Xie

Zhang

et al. 2015

IEEE Trans. Plasma Sci.

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This paper describes a compact high storage density inductive-capacitive storage module. The module is based on high-power opening switches using inverse current commutation with semiconductor devices commutation principle and a high storage density Brooks inductor. These opening switches, being able to switch-OFF pulse currents up to 14.5 kA by the countercurrent subcircuit, make use of the general property of a standard high-power thyristors impedance transition from closing state to blocking state. The experimental results show that with the primary capacitor and counter-current commutation subcircuit charged voltage 3 and 2.5 kV, respectively, the charged current of the Brooks-type inductor is about 14.5 kA, with a charged time of about 4.5 ms. The output peak current of the inductive storage module is about 21 kA. The total stored energy is about 54.9 kJ while the energy density of the inductor is approximately 6.69 MJ/m 3 , which is not including the primary storage and commutation unit.Index Terms-Brooks inductor, inductive storage system, opening switch, solid state.

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Stretch Meat Grinder: A Novel Circuit Topology for Reducing Opening Switch Voltage Stress

Cited by 69 publications

References 6 publications

Design, Construction, and Testing of an Inductive Pulsed-Power Supply for a Small Railgun

Design, Construction, and Testing of an Inductive Pulsed-Power Supply for a Small Railgun

System Implementation and Testing of the STRETCH Meat Grinder With ICCOS

A 50 kJ Inductive–Capacitive Storage Module With Solid-State High-Power Opening Switch Based on Counter-Current Thyristor

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