Specification for photoelectric control units for road lighting

Turkey is rich in terms of renewable energy sources and, therefore, is now encouraging the use of sustainable clean lighting systems in road applications. High pressure sodium lamp is the most widely used type in main roads, but other types of lamps such as mercury vapour lamps or metal halide lamps can be utilized for street lighting. Since it enables energy and money saving, LED light technology has replaced high pressure sodium lamps nowadays. Once solar power system (PV) is integrated with LED lamp for street lighting, the amount of saving and local impact might be enriched. LEDs used as light sources in road lighting luminaires with rising lumen values, decreasing junction temperature, higher colour rendering efficiency, longer lifetime have become more efficient than many light sources with the latest developments. Since the structure of the luminaires in which the LED light sources are used differs from that of the conventional light sources, the optical, thermal and electrical design of the LED luminaires must be considered differently. Thus, this study concentrates upon design considerations and the operating principle of solarpowered LED road lighting luminaire in details. Also, a simple solar panel system was designed and the economical values obtained at the end of 20 years were compared when using the ongrid system and the off-grid system.

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Effect of Contact Failure of Connector in Electronic Control Units on Radiated Emissions

IEEJ Transactions on Fundamentals and Materials ◽

10.1541/ieejfms.132.456 ◽

2012 ◽

Vol 132 (6) ◽

pp. 456-457

Author(s):

Kazuya Uehara ◽

Yu-Ichi Hayashi ◽

Takaaki Mizuki ◽

Hideaki Sone

Keyword(s):

Electronic Control ◽

Control Units ◽

Radiated Emissions ◽

Contact Failure

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Optimized control over modes of hydraulic percussion cutting heads of mining machines

MINING INFORMATIONAL AND ANALYTICAL BULLETIN ◽

10.25018/0236-1493-2020-6-0-95-104 ◽

2020 ◽

pp. 95-104

Author(s):

Yu. M. Smirnov ◽

B. M. Kenzhin ◽

N. S. Smakova ◽

M. A. Zhurunova

Keyword(s):

Time Derivative ◽

Operating Conditions ◽

Control Action ◽

Main Function ◽

Output Data ◽

Working Cycle ◽

Control Units ◽

Action Change ◽

Function Element ◽

Service Factors

The main cause of the disagreement between the actual and calculated output data of hydraulic percussion mining machines is the erroneous feed of manipulation signals by the control units. For the maximal fitting of the calculated and actual figures, the continuous method of control action using the third time derivative of the law of motion of the main function element is accepted, namely, the accuracy. The mathematical models of control using displacement, velocity and acceleration are developed. The service factors of mining machines are found. Based on the theory of control and the mathematical logic theory, the logical circuits of formation of manipulation signals in each phase of the working cycle are developed. The main elements are converters, integrators and accumulators ensuring decomposition of elements of the logical circuits and further generation of appropriate control action. It is found that the simplest way is to generate the control action for acceleration of the key function element. For the developed circuits, it is recommended to use general charts of the control action change, implementable for a certain design of hydraulic percussion cutting heads in certain operating conditions.

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