ELECTRONIC CIRCUIT PREVENTING THE OVERSHOOT OF THE MAXIMUM RATED VOLTAGE IN ELECTRICAL EQUIPMENTS WITH ALTERNATOR AND ACCUMULATOR
The invention relates to an electronic circuit for preventing the overshoot of the maximum rated voltage in the electrical equipments with alternator and accumulator. According to the invention, the circuit comprises a voltage comparator (C), which compares the existing voltage with a reference volt...
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Format: | Patent |
Sprache: | eng ; rum |
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Zusammenfassung: | The invention relates to an electronic circuit for preventing the overshoot of the maximum rated voltage in the electrical equipments with alternator and accumulator. According to the invention, the circuit comprises a voltage comparator (C), which compares the existing voltage with a reference voltage (V REF) which represents the maximum rated voltage of the circuit, and in case of overshoot, a relay (REL) is switched on, thereby switching off the supply circuit of a regulator (RRT) and consequently the alternator excitation, and the relay (REL) maintains its switched on condition through a normal open contact until the mains supply is switched off. A first electroluminiscent diode (LED 1) serially connected with a Zener diode (DZ 2) which makes it light up only if the circuit voltage is higher than or equal to "U". The switching off of the diode (LED 1) while the alternator is operating, is an indication of a faulty operation of the regulator (RRT) or an alternator failure, which results in unloading the accumulator in a time period given by the consumption and the capacity thereof. A second electroluminiscent diode (LED 2) signals the switching off of the excitation circuit due to an overshoot of the maximum rated voltage, thereby indicating the regulator (RRT) failure.
Invenţia se referă la un circuit electronic pentru prevenirea depăşirii tensiunii maxime admisă în echipamentele electrice cu alternator şi acumulator. Circuitul conform invenţiei este constituit dintr-un comparator de tensiune (C), care compară tensiunea existentă faţă de o tensiune de referinţă (V) care reprezintă tensiunea maximă admisă în circuit, iar în cazul depăşirii acesteia, anclanşează un releu (REL), care întrerupe circuitul de alimentare a unui regulator (RRT) şi deci excitaţia alternatorului, iar releul (REL) se automenţine anclaşat printr-un contact normal deschis, până la întreruperea alimentării generale. O primă diodă electroluminiscentă (LED 1) are în serie o diodă Zener (DZ), care face ca ea să lumineze numai dacă tensiunea în circuit este mai mare sau egală cu "U". Stingerea diodei (LED 1) cu alternatorul în lucru indică o funcţionare defectuoasă a regulatorului (RRT) sau o defecţiune a alternatorului care va conduce la descărcarea acumulatorului într-un interval de timp dat de consum şi de capacitatea acestuia. O a doua diodă electroluminiscentă (LED 2) semnalizează decuplarea circuitului de excitaţie, datorită depăşirii tensiunii maxime admise, indicând defectarea r |
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