9818246813

Zeszyły Problemowe - Maszyny Elektryczne Nr 86/2010

of economic indicators of the Stop & Go system. Supcrcondensator has a 1000 times bigger durability than PbPb02 battery with around 40 times smaller mass.

Researchers of real characteristics of the car Fiat Palio Weekend 1,2 8V were done for calculations of tradi-tional characteristics The Stop & Go system was designed and produced for this vehicle A starter, which will have NeFeB magnets built in stator instead of induction winding. was designed. A mod-emization of the starter is necessary because of different type of working - freąuent starting of the intemal combustion engine. A project of the Stop & Go system was carricd out in the Fiat Palio car a project of the Stop & Go system for Mild Hybrid drive and verification of correctness of working has been carried out in the Fiat Palio car

Rafał Setlak, Maciej Krzyszkowski Politechnika Śląska, Gliwice

ELEKTRYCZNY HAMULEC POSTOJOWY HILL HOLDER W SAMOCHODZIE OSOBOWYM

ELECTRIC PARKING BRAKE HILL-HOLDER IN PASSENGER CAR

Abstract: The paper describes design and build the model of the Electric Parking Brake in automobiles. The Microprocessor Control System of the Hill-Holder brake shall be equipped with self-locking feature when it detects a vehicle stop and tilt (front of the car is higher than the rear). The system should automatically let go of the brake when starting the vehicle. and should provide an opportunity for traditional. hand-brake control of the rear axle. The system is designed to enable the driver on a hill to start wilhout a risk of rolling back.

This article consists of two parts, the first one describes the theoretical behavior of the selected vehicle during braking or starting on a hill. and the concept of integration of the Hill-Holder and ABS in the Fiat Panda. Im-plementation of the Hill-Holder system with the ABS controller of the Fiat Panda may be a cheaper altemative to the Hill Holder system of the Fiat Group combined with the ASR,

The practical section consists of design and build of the microprocessor Hill-Holder system for automobiles: the driver consists of typical wheel speed sensor to inform the drivcr about actual speed. typical throttle posi-tion sensor or the accelerator position sensor so the driver could read car driver's intensions and let go of the brake in the right time, inclination sensor of the vehicle body (MEMSICs MXD2020ML) to define if the actual inclination requires the Hill-Holder brake to be activated. additional signals from the ignition switch and brake light switch, executive motor with permanent magnets and planetary transmission, ineasuring Systems to control if the system is working properly. Ddriver system based on ATMEL s microcontroller ATmega8.

Henryk Banach Politechnika Lubelska, Lublin

OPTYMALIZACJA SPRAWNOŚCI SILNIKA INDUKCYJNEGO Z ZASTOSOWANIEM KRYTERIUM MINIMALNEGO PRĄDU STOJANA

EFFICIENCY OPTIMIZATION OF AN INDUCTION MOTOR USING THE CRITERION OF MINIMAL STATOR CURRENT

Abstract: Control strateg}- which optimized efficiency of induction motor can function using many different criteria. One of they is the criterion of minimal stator current. On the bases of laboratory tests as well as theoretical analysis it was proven that an equivalent criterion of the minimum of total losses was a criterion of the minimal stator current. Laboratory tests were conducted with using the squirrel-cage induction motor about the power P_N =1,1 kW and the rotation speed n_x =1415 rev/min. Control strateg} of efficiency optimization which use the criterion of minimal stator current would be straightest in the technical realizatioa Unfortunately, time of investigation would be for minimal value of stator current enough rather long. This process would be dis-turbed and extended by stochastic changes of supplying parameters and stochastic changes of motor load.