| 摘要 |
The proposed control device for a multifunctional voltage converter contains a triangle pulse generator based on an integrator, a square pulse generator based on a comparator, a pulse former based on a trigger and AND logic element with three inputs, a feedback signal converter based on a comparator, a diode bridge feedback signal rectifier with a smoothing capacitor and an adjusting resistor that is inserted between the input of the rectifier and the common terminal of the power-supply circuit of the device, a voltage divider with a potentiometer in the feedback circuit, a unit for current overload protection, two parametric voltage stabilizers, a protective diode, and a power-supply unit. The noninverting input of the comparator in the circuit of the feedback signal converter is connected to the output of the triangle pulse generator, the inverting input is connected to the output of the rectifier, and the output is connected to the first input of the AND logic element. The second input of the AND logic element is connected to the output of the unit for current overload protection, the third input is connected to the output of the trigger of the pulse former, and the output is connected to the input of the preamplifier of the multifunctional voltage converter. The power-supply circuits of the proposed device are connected to the output terminals of the first parametric voltage stabilizer, which contains a current-limiting resistor and two stabilitrons connected in series to each other. The negative terminal of the rectifier is connected to the point of the connection of the current-limiting resistor and the stabilitron in the circuit of the second parametric voltage stabilizer, and the positive terminal is connected to the first terminal of the voltage divider and the positive terminal of the smoothing capacitor. The second terminal of the voltage divider and the negative terminal of the capacitor are connected to the second terminal of the power-supply source. The output of the potentiometer of the voltage divider is connected to the inverting input of the comparator in the circuit of the feedback signal converter and the anode of the protecting diode. The cathode of the protecting diode is connected to the terminal of the current-limiting resistor in the circuit of the second parametric voltage stabilizer and the point of the connection of the current-limiting resistor and the stabilitron in the circuit of the second parametric voltage stabilizer.
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