Quality Inspection of High-Power DC Power Supply Manufacturers 1. Ripple Voltage of High-Power DC Power Supply: This refers to the alternating current (AC) component superimposed on the output voltage. It can be observed and measured for its peak value using an oscilloscope, typically in millivolt levels; an AC millivolt meter can also be used to measure its RMS value, but due to the ripple not being a sine wave, there is some error involved. Generally, the ripple voltage VP-P of high-power DC power supplies is less than or equal to 10mV. 2. Stability Voltage Coefficient: The relative change in output voltage due to the relative change in input voltage under the condition that the load current and environmental temperature remain unchanged. 3. Current Voltage Adjustment Probability: The relative change in output voltage when the input voltage changes by ±10%; the stability voltage coefficient and voltage adjustment probability both indicate the interference of input voltage changes on output voltage, so it is sufficient to test only one of them. Aviation Ground Power: 2, 36V Aviation Power Supply; 1, 400Hz Frequency Converter Power Supply; 7, 115/200V Power Supply; 2, 27V DC Power Supply; 5, 400Hz Power Supply; 12, Aviation Power Supply
High-Power DC Power Supply Manufacturer 1. Battery Simulation Function (Programmable Output Impedance). To test circuits or devices powered by a power supply under real-world conditions, it is beneficial to use a test source with battery-like characteristics. For instance, the internal resistance of a power supply varies, leading to voltage drops in the device powered by a battery. The GW Instek PSW30-36 power supply features a programmable output resistance up to 833mΩ, which may seem like a small detail, but this programmable resistance can fully simulate the internal resistance of a battery, which is crucial for power supply battery simulation performance (this is also one of the main reasons they chose not to use other power supplies). 2. Programmable Rise Time (Preventing Surge Damage to the Device/Component Under Test). This is a critical aspect in many testing applications, such as LED testing, where the startup current may be significantly higher than the stable operating current of the LED, potentially damaging the LED device. To prevent transient voltage overshoot spikes from damaging the device during startup, the PSW30-36 power supply is equipped with programmable voltage and current rise time (or transition rate) control features, as well as a constant current priority setting, reducing voltage and current overshoot when powering LEDs.
