Option 7: POWER SUPPLY note
(1) in order to make the POWER SUPPLY life growth, suggested the use of more than 30% output power rating model. (derating rules) power supply such as if the system requires a 100W greater than 130W, it is recommended that the selection of rated output power of the aircraft, and so on can effectively improve the life of POWER SUPPLY.
(2) in addition to still need to consider the working environment temperature of POWER SUPPLY, and there is no auxiliary heat extra equipment, in high temperature POWER SUPPLY ring derating.
(3) according to the application required to choose various functions:
Protection function: over voltage protection (OVP) (OTP), over temperature protection, over load protection (OLP) etc..
Application of functions: signal function (POWER GOOD, POWER FAIL), the function of remote control, telemetry function, parallel function etc..
Special features: power factor correction (PFC), power (UPS)
(4) select the required to meet the safety and electromagnetic compatibility (EMC) certification.
8 how to choose the power adapter to charge the battery?
Answer: charger products currently on the market there are ESC, SC, PA, PB series products (120~360W), the use of the charging demand these models inadequate, and the other is needed to use other models, power adapter, the function of overload protection suggestion chosen (OLP) is the best constant current mode, followed by Foldback Current or Limiting the constant power mode. Because when the pool without power, for power adapter, the output current will increase with the degree of the battery, battery capacity size and become high, this time a protection circuit extremely has the chance to trigger power adapter, if the choice of models over load protection mode for the Hiccup, shutdown type will interrupt the charging of electric current as the load, the protection mode for the constant current mode, then can continuously maintain a certain current to the battery charging.
9 whether POWER can be used in 45~440Hz, if you can, whether there are other effects?
Answer: the standard general can use in this frequency range. But the use of frequency is too low, will cause the efficiency drop, for example: SP-200-24 operation to the input voltage 230VAC and rated load, when the input current frequency is 60Hz, its efficiency is 84%, but if the input current frequency is reduced to 50Hz, and its efficiency is 83.8%; while too high will make with PFC function models, the decrease of PF value, also will cause the increase of leakage current, for example: SP-200-24 operation to the input voltage 230VAC and rated load, when the frequency of the 60Hz input alternating current, power factor is 0.93 and the leakage current is 0.7mA; when the input AC frequency is 440Hz, the power factor is reduced to 0.75, while the leakage current increase to 4.3mA.
10 if the need 24V voltage, without this model can use 2 12V series?
Answer: can, but need to pay attention to take the minimum current models in the series, the maximum current required for the series after the entire system. In addition, the power supply is connected in series in order to prevent the damage caused by the internal capacitance may at start-up, SPU output end connected with the diodes and suggestions.
11 if you need to 600W power, whether the use of 2 S-320 and then?
Answer: can not be directly and then. Because S-320 without parallel function design, when 2 power output voltage is not at the same time, high voltage suffer vast losses most or all of the recommendations, with parallel function models, such as PSP-300 or PSP-500 is appropriate.
12 measuring two groups of output power, +5V is correct, +12V is beyond the specifications, what reasons?
Answer: many groups of products (more than 2 groups) output, requirements are Min. Load, use before the first refer to specification. When 5V/4A, 12V/0A, 12V output voltage high, about 12.8V exceeded the specification of + 6% (12.72V), at 12V if in accordance with the specification of joining the 0.2A Min. Load, 12V output voltage can be reduced to about 12.3V. |
