ČOBANOV Neven et al: LOW-FLOOR ELECTRIC TRAMCAR OF THE CITY OF ZAGREB
1.  The Invention
	Title : LOW-FLOOR ELECTRIC TRAMCAR OF THE CITY OF ZAGREB Description. ¸ 1. ENERGY CAPACITOR KONČAR – Electrical Engineering Institute Energy capacitor is the energy storage which covers the short-term dropout voltage in the system of the overhead contact lines by the time constant charging of the electric tramcars secondary equipment (e.g. air-conditioning, ventilation). The energy capacitor ensures total usage of the energy stored in the capacitor banks. The energy capacitor is connected to a direct current circuit of the auxiliary voltage converter in a way that enables it to cover the dropout of input voltage >250 ms by ensuring the time constant supply of the output alternating voltage 3x400 V, power 20 kW. Should the input dropout voltage occur, the auxiliary voltage converters fail to work, but the energy capacitor, due to the sufficient charge already stored in the capacitor banks, can still hold the circuit voltage of the converter at the value required for the alternator output voltage. Once the input voltage is regained, the converters continue working, get the output charge, and the bank of capacitor is being supplied with the limited current to the full value of the voltage charge of the circuit voltage. The energy capacitor consists of the capacitor banks, the chopper charging and the control guidance. Authors: ČOBANOV Neven, dipl. ing Coauthors: MACAN Miroslav, dipl. ing. i VUČETIĆ Niroslav, dipl. ing. 2. ELECTROMOTIVE DRIVE FOR THE LOW-FLOOR ELECTRIC TRAMCAR OF THE CITY OF ZAGREB KONČAR – Generators and motors The low-floor tramcar electromotive drive ensures the tractive and breaking characteristic features of the traction vehicle defined by the given rules and regulations and the market demand due to which the tramcar is fitted with safety and stability measures, and its concept features high passengers comfort in all possible working regimes in any given track conditions or variable overhead contact line voltage. The electromotive drive consists of the static semiconductor converter that is charged from the overhead contact lines, and two synchronous driving engines employed due to the tractive and braking regimes. The drive control is obtained by the multiprocessor which communicates with the master computer software of the traction vehicle. Each of the drives units is the most modern one and the manufacturing process involved modern technological methods and procedures, such as the installation of the IGBT traction inverter, the usage of the optical fiber for signal transmission, the central part of the multiprocessing system comprising of two digital signal processors and the electronic modules that are multilayered (processor modules are six-layered or eight-layered). The innovation is in the regulation by asynchronous driving engines (the modified method of a direct control of the moment is used), and by the energy stream regulation in the braking conditions. The fact that Croatia is one of only five European countries that manufacture low-floor tramcars, only verifies that the tramcar drive, the developmental ideas and the „know-how“ design principles are the highly complex ones. Authors: Mr. sc. KRUŠELJ Dubravko, dipl. ing., RISTER Nenad, dipl. ing., mr. sc. UNGAROV Josip, dipl. ing., FURIĆ Jere, dipl. ing. Coauthors: mr. sc. TEŽAK Nenad, dipl. ing, BAHUN Ivan, dipl. ing., mr. sc. SILADI Vladimir, dipl. ing., VUKOBRAT Miroslav, dipl. ing., MIKECIN Tonko, dipl. ing., HAVIĆ Edvin, dipl. ing. 3. DIRT/TMK2200: CENTRAL COMPUTER OF THE TRAMCAR OF THE CITY OF ZAGREB KONČAR – Electrical Engineering Institute The central computer of the tramcar DIRT/TMK 2200 is the tram master controller that operates the vehicle’s softwares. Thanks to the two identical channels, the high-mobility of the vehicle is obtained in case one of the channels should fail. DIRT/TMK 2200 is itself the innovative solution, i.e. the result of the development of its own modular circuit and the programme support. The main characteristic features: Total configuration redundancy (two identical channels – the first tram on the market with that redundancy); The simultaneous application of the distributed and centralized control concepts that make the high level of the vehicle availability feasible The tram equipment communication is supported by the three independent CAN/CANopen communication bus, the two of them being redundant in respect to the vital functions; The first tramcar on the market completely based on the CAN/CANopen communication interface principles; The system supports the “black box” functions; The complex algorithms for failure and error detection support so called “fail-safe” modus operandi, i.e. any central processor error does not interfere with the safety of the vehicle. The modular principle allows the application to other similar projects (e.g. tramcars, electromotor trains, underground trains, locomotives, electric power supply). Authors: MARIJAN Siniša, dipl. ing., ĆESIĆ Vinko, dipl. ing., CRNARIĆ Damir, dipl. ing. Coauthors: BILIĆ Mario, dipl. ing., FURČIĆ Boris, dipl. ing., mr. sc. TEŽAK Nenad, dipl. ing., IVANUŠ Krešimir, dipl. ing., BABIĆ Marin, dipl. ing., ŠPOLJAR Stjepan, teh. i VUKOBRAT Miroslav, dipl. ing. 4. THE TRAMCARS AUXILIARY VOLTAGE CONVERTER KONČAR – Electrical Engineering Institute The auxiliary voltage converter ensures the charging of the electric tramcar secondary equipment with alternating and direct current voltage. The converter stabilizes the variable direct current voltage (d/c can vary with the limits of 420 V – 750 V) and provides the time constant charging of the voltage of the output as well as the rated power output. The auxiliary voltage converter consists of three branches of output terminals: Output 1: three-phase voltage 3 x 400 V, 50 Hz ± 1 Hz, 20 kVA, intended for asynchronous driving engines charging; Output 2: direct current voltage for battery charging and charging of the 24 V circuits, power 12 kW; Output 3: one-phase voltage 230 V, 50 Hz power 2, 2 kW. The characteristic features of the converter: IGBT circuit switches (transistors) that operate on a high frequency circuit; Optical fiber for signal transmission; Microprocessing system for control and diagnostic designed by the method of software modules; The multilayered printing technology; The use of eco-materials. All the converter outputs have the coat of galvanization to isolate the branches of input and reciprocally. The converter has its own case. The cooling of the converter is done by forced ventilation. Authors: ČOBANOV Neven, dipl. ing Coauthors: MACAN Miroslav, dipl. ing. i VUČETIĆ Niroslav, dipl. ing. Presentation. Fields of application Advantages Stage of development. production item. Documentation available:  ( ) No   (x ) Yes   leaflet, brochure, website,
	Name Photo. Self introduction. Owner of the invention? (Is it the inventor?)   (x ) No  () Yes KONČAR ELECTRICAL INDUSTRIES Inc.
3.  Protection
	Patent Status: Patent protected - Priority (date of the very first patent application) Countries where it is in force
4.  Business intention
	Cooperation Selling the new product
5.  Contact
	KONČAR ELECTRICAL INDUSTRIES Inc. Fallerovo šetalište 22 10000 Zagreb CROATIA Tel: +385 1 36 67 328 www.koncar.hr info@koncar.hr