DC power supply is a device that maintains a stable, constant voltage and current in a circuit. Such as dry batteries, batteries, DC generators, etc., all require DC power supply. So, as a kind of DC power supply, what are the key points of using programmable DC power supply? , the following is introduced to you.

Application knowledge of programmable DC power supply:

1. Inductive load application

When the programmable DC power supply is turned on or off or the output voltage changes, the inductive load will generate reverse induction potential, which will affect the operation of the programmable DC power supply and even damage the programmable DC power supply. At this time, the output terminal of the programmable DC power supply A 2-pole transistor is connected in series with the load, and an RC absorption circuit composed of a power resistor and a capacitor is connected in parallel with the load end, which can effectively protect the programmable DC power supply.

2.Battery load application

When using a programmable DC power supply to charge the battery load, in order to avoid damage to the power supply due to incorrect battery polarity connection, a 2-pole transistor should be connected in series between the power supply and the battery to ensure the safe application of the programmable DC power supply.

3. Load application will cause reverse current

When the motor connected to the output end of the programmable DC power supply suddenly brakes, a large reverse current will occur. Because the programmable DC power supply cannot absorb the reverse current generated at the load end, the output voltage will increase. The solution is to Connect a diode in series between the output end of the programming DC power supply and the load, and connect a bleeder resistor at the load end to absorb the reverse current. When the reverse current is a peak surge, please connect a large-space electrolytic capacitor on the 2nd side of the load. .

4. Application of pulse load

Even if the current peak value of the pulse load is within the rated voltage range of the programmable DC power supply, or the load current waveform of the pulse circuit or motor drive circuit is within the nominal value (average value) indicated by the metering device, the current will reach the programmable DC power supply. rated voltage range, thereby reducing or appearing 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 higher output current.

5. Application of capacitive load

Because capacitive loads often cause the output voltage to rise, especially when the output voltage is adjusted from high to low, the output voltage drops slowly. Therefore, a power resistor is connected in parallel to the output end of the programmable DC power supply and in series between the output end and the load. A 2-pole tube can achieve better results.