Programmable DC Power Supply is a DC Power Supply that uses digital or encoder input to adjust voltage and current other than potentiometers. High-power programmable DC Power Supply is widely used in metallurgy, chemical and scientific fields, so how does it apply to life? First of all, it has: Tracking function - In some Programmable Power Supplies, there is a function of inter-channel linkage, that is, the tracking function. The tracking function means that all outputs are controlled at the same time, and by keeping the voltage consistent with the pre-set voltage, they all obey the unified command. For example: if voltage 1 changes from 10V to 12V, then voltages 2 and 3 will follow from 5V to 6V, and voltage 4 will follow from 20V to 24V. However, if the maximum current of one of the outputs in the leading position has a limit value, and when the output current reaches the limit value, all other output currents in the subordinate position also enter the current limiting state at the same time. If an electronic fuse is installed in the device, the output that reaches this limit value will be disconnected, and all other outputs in slave position will be disconnected. Induction (SENSE mode - compensation for the resistance of the wire itself In normal mode, the voltage is directly loaded on the load through the wire, so as to keep the load voltage stable. Since the load current will produce a voltage drop on the connecting wire, the actual load voltage should be equal to the power supply. Subtract the voltage drop from the output voltage. If the power supply is set to output 3.3V/1A, and if the resistance of the output wire is 0.3 ohms, a voltage drop of 0.3V will be formed on the wire, and the actual voltage will become 3.0V, This is enough to cause the powered unit to not work properly. Similar to the four-wire measurement method when measuring resistance with a multimeter, we need to compensate for the voltage drop in the wire. To do this, the SENSE terminal can be used to directly measure the voltage across the load. The current drawn by the power supply is very small, so the resulting voltage drop can be ignored, that is, the voltage induced by the power supply device is actually the real load voltage, so the power supply device will increase its output to be equal to the sum of the wire voltage drop and the required load voltage, In this way, the compensation for the voltage drop of the wire is realized, so that the load can truly obtain the set voltage value. In addition, some power supplies have added a readback function to compensate for the resistance of the wire itself.
Arbitrary waveform power supply - some programmable power supplies have the function of arbitrary waveform editing, that is, generating waveforms that change with time. Corresponding generation of voltage and time interval parameters and lists can generate user-defined waveforms in the low frequency range. The frequency of this signal is determined by the time interval between each point. Arbitrary signals are generated digitally and are fairly simple to define. Generally, an arbitrary waveform signal can include various amplitudes of different magnitudes, which can be processed one by one to generate periodic repetitive waveforms. These programming waveforms can be single-pulse or repeating continuous waveforms. The programmed output voltage can also be externally modulated. Signals can be freely defined within the range allowed by the instrument specifications and can be stored in the instrument. Such signals can be defined via RS-232, IEEE-488 or USB interfaces.
Modulation - Some programmable power supplies have an external modulation function. Using the terminals on the rear panel, two sets of outputs can be modulated. For example, the HM8143 of the German company Huimei, the modulation slope of up to 1V/μs and the minimum pulse width of 100μs in any mode allow the generation of complex load characteristics. Regardless of power level, the linear output components have very low distortion to facilitate external modulation.
With these functions, we can use it better. It is mainly used in automotive electronics, battery testing and other sectors. Aerospace and military industries are sometimes involved. Thanks to its efficient running speed and multiple protection functions, it is easy to use. will be more secure and reliable.
