Do you know the four common senses of programmable DC power supply
A programmable DC power supply is a device that maintains a constant voltage and current in a circuit. Such as dry batteries, storage batteries, DC generators, etc. all need to use DC power supply. So, as a kind of DC power supply, what are the main points of using programmable DC power supply?
Common sense of programmable DC power supply:
1. Inductive load application:
But when the DC power supply is switched or the output voltage is changed, the inductive load will generate an induced electromotive force in the opposite direction and affect the work of the DC power supply, and even cause damage to the DC power supply. At this time, the DC power supply A diode is connected in series between the output terminal and the load, and an RC absorbing circuit composed of a power resistor and a capacitor is connected in parallel at the load terminal, which can effectively protect the DC power supply;
2. Battery load application:
When the programmable DC power supply is used to charge battery-type loads, in order to prevent damage to the power supply caused by incorrectly connecting the polarity of the battery, a diode should be connected in series between the power supply and the battery to protect the DC power supply. safe use.
3. Load application that will generate reverse current:
However, when the motor connected to the output terminal of the programmable DC power supply brakes suddenly, a large reverse current will be generated. Since the programmable DC power supply cannot absorb the reverse current generated from the load terminal, the output voltage will rise. The solution is to connect a diode in series between the output terminal of the programmable DC power supply and the load, and connect a discharge resistor in parallel at the load terminal to absorb the reverse current. When the reverse current is a peak, please connect a large-capacity electrolytic capacitor across the load.
4. Pulse load application:
Even if the current peak value of the pulse-type load is within the range of the output rated current value of the DC power supply, or the load current waveform of the pulse-type circuit or motor drive circuit is within the nominal value (average value) indicated by the metering device. The current can also reach the rated current region of the DC power supply, causing the output voltage to drop or appear unstable. The solution is to connect an inductor in series between the power supply and the load, or choose a programmable DC power supply with a larger output current.
