| 摘要 |
The invention relates to a commutation voltage source which is supplied at the input with a nominal direct current voltage of 12 V to provide, at the output, a double stabilized direct current voltage of +15 V and -15 V. According to the invention, the voltage source consists of an oscillator () made of an integrated astable circuit (), in connection to which there are mounted a capacitor () and a resistor (), the signal produced by the oscillator () being transmitted through another resistor () to an electronic switch () which, by some current commutations, generates variations of the magnetic field flux in a primary winding of a transformer (), resulting in variable voltages occurring within some secondary windings of the transformer (), said variable voltages being rectified by some diodes () and filtered by some capacitors (), some inductors () being placed among them, an integrated optocoupler circuit () ensuring the galvanic insulation between the output circuit and the input circuit, as well as an overload protection circuit made of a transistor (), some resistors (), a capacitor () and some diodes () and an overload protection circuit of the transistor () represented by some diodes (). |
