Do you know the four common sense of using programmable DC power supply?
1, Inductive load application:
When switching on or off the DC power supply or changing the output voltage, the inductive load will generate reverse induced electromotive force, which will affect the operation of the DC power supply and even cause damage to it. At this time, a diode is connected in series between the output terminal of the DC power supply and the load, and an RC absorption 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 applications:
When a programmable DC power supply is used to charge battery loads, in order to prevent damage to the power supply caused by misconnecting the polarity of the battery, a diode should be connected in series between the power supply and the battery to protect the safe use of the DC power supply.
3, Load applications that generate reverse current:
When the motor connected to the output terminal of the programmable DC power supply suddenly brakes, a large reverse current will be generated. Due to the inability of the programmable DC power supply to 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 to connect a discharge resistor in parallel at the load terminal to absorb the reverse current. When the reverse current is a sharp spike, please connect a large capacity electrolytic capacitor in parallel at both ends of the load.
4, Pulse type load application:
The peak current of pulse type loads is within the rated output current range of the DC power supply, or the load current waveform of pulse type circuits or motor drive circuits is within the nominal value (average value) indicated by the measuring equipment. The current will also reach the rated current range 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.
