| 摘要 |
<p>The invention relates to a system for the control of the charging voltage of a secondary battery and for the supply of auxiliary services of a traction vehicle. According to the invention, the system comprises a variable D.C. voltage regulator (1) made with a IGBT transistor controlled by means of a galvanically insulated unit (2) by a PWM generator (3), a voltage regulator (4) which receives an input preset voltage (u*) and a voltage (ur) from an auxiliary service system (5) at the terminals of a battery (6), respectively, by means of a voltage transducer (7), as well as a current regulator (8) which receives a preset input current signal (i1*) and an actual current signal (i1r) concerning the charging state of the battery (6) by means of a current transducer (9) and a opto-galvanical insulation amplifier (10), a minimal value circuit (11) which, at the switch in of the PWM generator (3), couples with the current regulator (8) or the voltage regulator (4), depending on the lower value of the voltages (u1 or u2) supplied at the output of the two regulators (8 or 4), an interlock circuit (12) which locks out the PWM generator (3) in case of surpass of a limit value of the current (i2*) required for an excitation current (i2r) of the booster (13) which supplies, by means of a direction diode (14), the auxiliary service system (5) and the battery (6).</p> |
