Synthesis and Performance of Digitally Controlled Current Source

Power electronics play a fundamental role for electric transportation, renewable energy conversion and many other industrial applications. They have the ability to help achieve high efficiency and performance in power systems. However, traditional inverters such as voltage source and current source inverters present some limitations. Consequently, many research efforts have been focused on developing new power electronics converters suitable for many applications. Compared with the conventional two-stage inverter, Z-source inverter (ZSI) is a single-stage converter with lower design cost and high efficiency. It is a power electronics circuit of which the function is to convert DC input voltage to a symmetrical AC output voltage of desired magnitude and frequency. Recently, ZSIs have been widely used as a replacement for conventional two-stage inverters in the distributed generation systems. Several modifications have been carried out on ZSI to improve its performance and efficiency. This paper reviews the-state-of-art impedance source inverter main topologies and points out their applications for multisource electric vehicles. A concise review of main existing topologies is presented. The basic structural differences, advantages and limitations of each topology are illustrated. From this state-of-the-art review of impedance source inverters, the embedded quasi-Z-source inverter presents one of the promising architectures which can be used in multisource electric vehicles, with better performance and reliability. The utilization of this new topology will open the door to several development axes, with great impact on electric vehicles (EVs).

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Ideal Mechanization: Exploring the Machine Metaphor through Theory and Performance

Arts ◽

10.3390/arts8020067 ◽

2019 ◽

Vol 8 (2) ◽

pp. 67

Author(s):

Amy LaViers

Keyword(s):

Animal Behavior ◽

Cell Phones ◽

Human Experience ◽

Audience Participation ◽

Theoretical Discussion ◽

Live Performance ◽

Digitally Controlled ◽

And Performance

Models of machines, including the increasingly miniaturized, digitally controlled machines of modern computers, inform models of human and animal behavior. What are the impacts of this exchange? This paper builds on theoretical discussion to produce an artistic exploration around this idea. The paper uses known limits on computation, previously proved by Turing, to model the process of mechanization, machines interacting with an environment. This idea was used to inform a live performance that leveraged a theatrical setting emulating an ideal mechanization machine, audience participation with their bodies as well as their personal cell phones, and readings of academic papers, which is also presented. The results of this work is a shared exploration of when human experience fits machine-based metaphors and, when it does not, highlighting distinct strengths and questioning how to measure the capacities of natural and artificial behavior.

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DIGITALLY CONTROLLED FLOW METERING UNIT WITH DOUBLE ACTUATION FOR FAST TRANSIENT RESPONSE IN AUTOMOTIVE APPLICATIONS

Journal of Circuits System and Computers ◽

10.1142/s0218126694000260 ◽

1994 ◽

Vol 04 (04) ◽

pp. 459-469

Author(s):

T. KREPEC ◽

A.I. GEORGANTAS

Keyword(s):

Transient Response ◽

Gasoline Engine ◽

Injection System ◽

Fast Transient Response ◽

System A ◽

Flow Metering ◽

Digitally Controlled ◽

And Performance ◽

Controlled Flow ◽

The Mathematical Model

This paper proposes a novel compact, inexpensive, yet versatile flow metering unit which consists of two hydraulic valves incorporated in a single barrel and operated directly by two digital actuators. For the evaluation of the concept, the mathematical model of the unit is developed and validated. The model is subsequently used to investigate the operability and performance of the system. A specific control strategy taking advantage of the system hardware is implemented. The enhancement of the transient response, as compared to single actuation conventional units, is demonstrated. Furthermore, the back-up functionality in case of failure of one of the valves is ascertained. This kind of double actuator unit is proposed for, but not limited to, fuel metering in a gasoline engine throttle body injection system.

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Bidirectional current source converter: Design, control and performance evaluation

2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC) ◽

10.1109/spec.2016.7846128 ◽

2016 ◽

Author(s):

Baljit Riar ◽

David Howey ◽

Duleepa Thrimawithana ◽

Daniel Rogers ◽

Regan Zane

Keyword(s):

Performance Evaluation ◽

Current Source ◽

Current Source Converter ◽

Converter Design ◽

And Performance

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Digitally controlled current source for demagnetization refrigerators

Cryogenics ◽

10.1016/0011-2275(94)90160-0 ◽

1994 ◽

Vol 34 (9) ◽

pp. 739-744 ◽

Cited By ~ 1

Author(s):

P. Skyba ◽

A. Gréser ◽

Z. Krasnay ◽

N. Smolka

Keyword(s):

Current Source ◽

Digitally Controlled

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New Sleep-Based PFSCL Tri-State Inverter/Buffer Topologies

Journal of Circuits System and Computers ◽

10.1142/s0218126617501869 ◽

2017 ◽

Vol 26 (12) ◽

pp. 1750186 ◽

Cited By ~ 1

Author(s):

Neeta Pandey ◽

Bharat Choudhary ◽

Kirti Gupta ◽

Ankit Mittal

Keyword(s):

Power Supply ◽

Positive Feedback ◽

Current Source ◽

Propagation Delay ◽

State Behavior ◽

Maximum Reduction ◽

And Performance ◽

Feedback Source

This paper describes new sleep-based positive feedback source-coupled logic (PFSCL) tri-state inverter/buffer topologies. The tri-state behavior is obtained by disconnecting the circuit from both power supply and ground. This is achieved by placing additional transistors, driving the load transistor to cut off or disabling the current source. The combination of the three methods results in six new topologies. The functionality and performance of the proposed topologies is studied through SPICE simulations. A comparison with available sleep-based PFSCL tri-state buffer circuit shows a maximum reduction of 11% and 60% in the propagation delay and output enable time, respectively. The usefulness of the proposed topologies is illustrated through bus and D latch implementation.

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