Direct support and general support maintenance repair parts and special tools lists (including depot maintenance repair parts and special tools) for electronic equipment configuration OH-6A, Army model helicopter without standard lightweight avionics equipment.

"October 1976."

Direct support and general support maintenance repair parts and special tools lists (including depot maintenance repair parts and special tools) for electronic equipment configuration for CH-47A, CH-47B, and CH-47C helicopters.

"November 1978."

Instructions for installing installation kit, electronic equipment MK-1240/GRC in truck, cargo, 2 1/2 ton, 6x6, M34, M35, M135, or M211, for radio set AN/VRC-46, AN/VRC-53, AN VRC-64, AN/GRC-125, or AN/GRC-160.

"29 November 1973."

Operator's manual : terminal, radio-telephone, mobile subscriber AN/VRC-97 (NSN 5820-01-246-6818) and installation kit, electronic equipment MK-2564/VRC-97 and MK-2565/VRC-97 (NSN 5820-01-246-6873).

"1 March 1989."

Operator and organizational maintenance manual including repair parts and special tool lists : maintenance kit, electronic equipment, MK-1004/ARC.

"March 1968."

Organizational maintenance manual including repair parts list : maintenance kit, electronic equipment, MK-733/ARC-54.1004A/ARC.

"June 1967."

Operator and organizational maintenance manual : maintenance kit, electronic equipment MK-722/URC.

"10 December 1964."

Organizational, direct support, and general support maintenance repair parts and special tools list for maintenance kits, electronic equipment MK-1978A/VRC (NSN 6625-01-078-5893).

Includes index.

General support maintenance repair parts and special tools list for test station, electronic equipment AN/USM-410(V)2 (NSN 6625-01-069-4223).

"18 October 1985."

Organizational and direct support maintenance manual for electronic equipment test facility TADS/PNVS augmentation equipment, 13082808-39, 13231600, 13231650, and 13231800.

"1 February 1986."

A methodology and a tool to design of mixed-signal technology

This paper presents a tool box developed to read files describing a SIMULINK® model and translates it into a structural VHDL-AMS description. In translation process, all files and directory structures to simulate the translated model on SystemVision™ environment is generate. The tool box named MS2SV was tested by three models of commercially available digital-to-analogue converters. All models use the R2R ladder network to conversion, but the functionality of these three components is different. The methodology of conversion of the model is presents together with sort theory about R-2R ladder network. In the evaluation of the translated models, we used a sine waveform input signal and the waveform generated by D/A conversion process was compared by FFT analysis. The results show the viability of this type of approach. This work considers some of challenges set by the electronic industry for the further development of simulation methodologies and tools in the field of mixed-signal technology. © 2007 IEEE.

HPF boost interleaved operating in discontinuous conduction mode for trolleybus application

This paper deals with results of a research and development (R&D) project in cooperation with Electric Power Distribution Company in São Paulo (Brazil) regarding the development and experimental analysis of a new concept of power drive system suitable for application in traction systems of electrical vehicles pulled by electrical motors, which can be powered by urban DC or AC distribution networks. The proposed front-end structure is composed by five boost power cells in interleaving connection, operating in discontinuous conduction mode as AC-DC converter, or as DC-DC converter, in order to provide the proper DC output voltage range required by DC or AC adjustable speed drivers. Therefore, when supplied by single-phase AC distribution networks, and operating as AC-DC converter, it is capable to provide high power factor, reduced harmonic distortion in the input current, complying with the restrictions imposed by the IEC 61000-3-4 standards resulting in significant improvements for the trolleybuses systems efficiency and for the urban distribution network costs. Considering the compliance with input current restrictions imposed by IEC 61000-3-4 standards, two digital control strategies were evaluated. The digital controller has been implemented using a low cost FPGA (XC3S200) and developed totally using a hardware description language VHDL and fixed point arithmetic. Experimental results from a 15 kW low power scale prototype operating in DC and AC conditions are presented, in order to verify the feasibility and performance of the proposed system. © 2009 IEEE.

A novel single-phase hpf hybrid rectifier suitable for front-end trolleybus systems

This paper proposal presents the development and the experimental analysis of a new single-phase hybrid rectifier structure with high power factor (PF) and low harmonic distortion of current (THDI), suitable for application in traction systems of electrical vehicles pulled by electrical motors (trolleybus), which are powered by urban distribution network. This front-end rectifier structure is capable of providing significant improvements in trolleybuses systems and in the urban distribution network costs, and efficiency. The proposed structure is composed by an ordinary single-phase diode rectifier with parallel connection of a switched converter. It is outlined that the switched converter is capable of composing the input line current waveform assuring high power factor (HPF) and low THDI, as well as ordinary front-end converter. However, the power rating of the switched converter is about 34% of the total output power, assuring robustness and reliability. Therefore, the proposed structure was named single-phase HPF hybrid rectifier. A prototype rated at 15kW was developed and analyzed in laboratory. It was found that the input line current harmonic spectrum is in accordance with the harmonic limits imposed by IEC61000-3-4. The principle of operation, the mathematical analysis, the PWM control strategy, and experimental results of a 15kW prototype are also presented in this paper. © 2009 IEEE.

Trolleybus power system for operation with AC or DC distribution networks

This paper presents the development and experimental analysis of a special input stage converter for a Trolleybus type vehicle allowing its operation in AC (two wires, single-phase) or DC distribution networks. The architecture of proposed input stage converter is composed by five interleaved boost rectifiers operating in discontinuous conduction mode. Furthermore, due to the power lines characteristics, the proposed input power structure can act as AC to DC or as DC to DC converter providing a proper DC output voltage range required to the DC bus. When operation is AC to DC, the converter is capable to provide high power factor with reduced harmonic distortion for the input current, complying with the restrictions imposed by IEC 61000-3-4 standard. Finally, the main experimental results are presented in order to verify the feasibility of the proposed converter, demonstrating the benefits and the possibility for AC feeding system for trolleybus type vehicle. © 2010 IEEE.