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What is the most important standard for the selection of high power DC power supply

Publisher: Administrator Date:2021-03-05


When choosing a high-power DC power supply, especially the selection of a programmable high-power high-power DC power supply, there are actually many considerations in the selection, and there are many parameters involved. It is because of these many parameters that people often feel at a loss. In fact, just like buying a lot of things, you can't take care of all aspects-all indicators are leading, and the price is lower. You need to understand what your core needs are.

1. Ripple voltage of high-power DC power supply: This refers to the AC voltage component superimposed on the delivered voltage. Oscilloscope device can be used to observe and detect its peak value, usually the detection result is in the order of millivolt; it can also be used to detect its effective value with an AC millivolt meter, but because the ripple is not a sine wave, it has a certain error, usually high power The ripple voltage VP-P of the DC power supply is less than or equal to 10mV;
2. Stable voltage coefficient: Under the condition that the load current and ambient temperature have not changed, the relative change of the input voltage will lead to the relative change of the output voltage;
3. The adjustment probability of current pressure: the relative change of output voltage when the relative change of the input voltage is ±10%, the stable voltage coefficient and the voltage regulation probability both indicate the interference of the change of the input voltage to the output voltage, so only inspection and testing are required One of them will do.

1. Battery simulation function (programmable output internal resistance function). In order to test power-supply circuits or devices under actual conditions, it is best to use a test source with battery characteristics. For example, the internal resistance of the power supply changes, so the voltage applied by the battery-powered device will have a voltage drop in the internal resistance of the battery. GW Instek’s PSW30-36 power supply has a programmable output resistance of 833mΩ. Don’t underestimate the 833mΩ resistance programmable feature. This can completely simulate the internal resistance of the battery, which is very important for the performance of the power simulation battery (this is also their One of the main reasons for abandoning the use of other power supplies).
2. Programmable rise time (to prevent surges from damaging the equipment/device under test). This is an aspect that needs attention in many test applications. For example, in the LED test, the instantaneous current of turning on may be much larger than the operating current of the LED in stable operation, which may cause damage to the LED device. In order to prevent the transient voltage overshoot spikes from damaging the device under test during startup, the PSW30-36 power supply has programmable voltage and current rise time (or slew rate) control functions and constant current priority settings to reduce voltage and current overcurrent when powering the LED Rush.
Shenzhen Sanxinda power supply equipment is a professional power supply manufacturer that produces electroplating power supply, electrolysis power supply, oxidation power supply, electrophoresis power supply and surface treatment power supply. The company adheres to the business philosophy of quality-oriented, energy-saving, and environmental protection, and strives to provide users with high-performance, high-efficiency, and high-reliability surface treatment power equipment.

SXD-PWH series high frequency switching power supply is a high frequency switching power supply originally developed and successfully developed by our factory. It has a completely different working principle from the previous power frequency silicon controlled rectifiers. It generates low voltage and large current output through the input high voltage AC rectifier-high voltage filter-high voltage and high frequency regulation-low voltage and high frequency rectification. Its working principle determines that the power supply has higher conversion efficiency and higher current conversion efficiency than the silicon controlled rectifier. Power factor has become the preferred power supply product for many customers. Using this power supply can significantly reduce production costs and improve product quality. Compared with thyristor power supplies, production energy consumption can be reduced by 20%-30%, bringing considerable economic benefits to users . The power supply is small in size and light in weight (water-cooled is smaller than air-cooled), and it is very easy to install and use, which can save valuable production space for users. The main power high frequency transformer of SXD-PWH series high frequency switching power supply adopts imported nano crystal/ultramicro crystal, high permeability material as the magnetic core, which is small in size and high in efficiency.
High-frequency and high-power switching components (IGBT), power drive modules, and three-phase bridge stack are all selected from international famous brands such as Mitsubishi, Fuji, Freetech, Germany, etc. The circuit board components are all selected from famous manufacturers. Our company has developed a unique water-cooled high-frequency electroplating power supply (patent pending), which has better cooling effect, anti-salt spray acidification, increases the service life of the power supply in harsh environments, and has stronger corrosion resistance, which can greatly extend the service life of the power supply. The water discharged from the machine is free of any pollution and can be recycled and reused!
SXD-PWH series high frequency switching power supply has complete protection functions: input phase loss, undervoltage, overheating, overcurrent, short circuit protection, safe and reliable.
The SXD-SS-SR series high frequency switching power supply has the following advantages compared with the ordinary switching power supply in the same market:
1. The full-bridge phase-shift soft switching control method is adopted to eliminate the switching stress to the greatest extent, and the world's latest full-bridge soft switching control IC is adopted, which has the function of automatically adjusting and setting the trigger pulse sequence parameters to achieve the best IGBT switching time. The IGBT switching loss is minimized, and the IC with its own synchronous rectification drive function is adopted, which simplifies the synchronous rectification drive circuit. Make its work more stable and reliable.
2. Adopt advanced logic interlock control circuit to eliminate pulse false trigger and overcome bridge arm short circuit.
3. It eliminates the magnetic bias problem, mainly in the following two aspects:
(1) The primary transformer of the main transformer uses series blocking capacitors
(2) Increase the bias magnetic automatic correction circuit
4. Using foreign original imported MOS tubes as secondary side rectifiers, and using advanced and reliable special imported synchronous rectification module technology, the efficiency of this high-frequency switching power supply is about 15% higher than that of similar ordinary rectifying switching power supplies under low voltage and high current conditions.
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