Weak current College】 【power technology glossary (5)】.

<br> PI-type filters PI FILTER to reduce the reflection ripple current in the switching power supply or DC-DC converter input frequently used a filter, the filter is typically used by two capacitors and an inductance. Inductor in two between the relative with .a capacitor. POST secondary voltage REGULATOR power supply auxiliary output of secondary voltage circuit. The circuit can be output more stable voltage. Power conversion POWER CONVERSION is the power from one form to another form of process. A power failure, POWER FAIL a power interface .alarm signal, which indicates that the input voltage will no longer be able to maintain full stable output voltage. Power factor POWER FACTOR AC circuits, the true power and apparent power ratio. In power conversion technology, power factor commonly used to describe the power supply .AC input current. Power supply for POWER SUPPLY a power source for electronic tubes or semiconductor devices provide appropriate voltage and current for the operation. Preset load PRELOAD in order to make the power supply is steady work, power supply may need driver must load. Usually .the power supply to the load current is very small. Pre-voltage module chip PRE-REGULATOR MODULEPRMV • I (VIC) that one of the range (width up to 5: 1) of the non-fixed DC bus soundness (ie 36 - .75V bus systems commonly used for 48V Telecom), converted to a mille-bus output to promote VTMs or other FPA products. PRM is a very high efficiency (up to 99%) non-isolated buck / boost converter, can also be manipulated than .Busbar. Junior PRIMARY isolated power supply input section, it received an AC power source, with a dangerous high voltage. Product grade PRODUCT with that product GRADE level. The environment and to decide on acceptance test performance. Pulse width modulated PULSE WIDTH MODULATIONPWM a switching .power supply conversion technology. Using this technology, switching valve's breakover time (or width) by negative transfusion circuit control so that the output remains stable. Push-pull converter PUSH-PULL CONVERTER a switching power supply circuit structure. The circuit consists of a Center .tap of the transformer and two power switches formed of two power switching valve turn on and off. Q access stable output voltage auxiliary output voltage QUASI-REGULATED OUTPUT is through adjusting the primary output voltage to adjust. And the necessary auxiliary output voltage of the transformer .turns ratio, and control the output voltage of closed-loop circuit jointly controlled auxiliary output voltage. Therefore, the converter must stable output voltage adjustment will be affected by the second. R rated output current RATED OUTPUT CURRENT in a specified environment temperature, power output .of maximum load current. Reflection ripple current REFLECTED RIPPLE CURRENT power input valid value (rms) or peak-peak AC ripple current, the current is the switching frequency converter. Adjustment rate REGULATION according to the input voltage and load changes in the power supply output .voltage to maintain the ability of the range. Adjustment range of output voltage REGULATION BAND allowed range. Output voltage changes should take account of all parameters: power supply voltage, load, temperature and time, etc. Regulatory agency REGULATORY Standards Association AGENCIESCSA: Canadian ( .Canada Standards Association); FCC: Federal Communications Commission (United States Federal Communications Commission); FTZ: Fernmelde Technisches Zentralamt; TÜV: Technischer Ü berchwangus Verein; UL: Underwriters Laboratory (Underwriters Laboratories); VDE: Verband Deutscher Electrotechniker. Remote control shutting down .REMOTE INHIBIT a TTL signal compatible power supply interface signals, it can turn off the power of one output or total output. Remote control on or off REMOTE ON / OFF remote power-on or off. The control of foot-circuit or access TTL high .level "1" when the power is switched on; the control of foot-and-switch is closed or the foot access TTL low level "0", the power-off. Remote control sample REMOTE SENSE in power output cable ends, access two .sampling line, you can test the actual voltage at the load. In this way, you can compensate the output cables and isolator pressure drop. Returns the RETURN on the public side of the power output. Output current returns from the side. Voltage and reverse .REVERSE VOLTAGE PROTECTION reverse voltage to the power input or output, voltage and reverse protection circuit prevents damage to the power supply. RFI RADIO FREQUENCY RF interference INTERFERENCERFI, power or other electrical and electronic equipment will produce noise. At power technology, RFI and EMC. .Ripple and noise and RIPPLE AND NOISE power supply DC output alternating component of amplitude, peak-peak value is usually used to or valid value (rms). Linear power supplies, the frequency of the alternating component and the AC power frequency of the same. .In switching power supply, the frequency of the alternating component is the switching frequency. S safety grounding SAFETY GROUND bypass to the conductive pathway. The path may be incorrect operation or fortuitous accident all dangerous current bypass to the ground, thereby preventing persons subjected to electric .shocks. Secondary output of SECONDARY isolated power supply. The parts and AC power isolation, thus ensuring personnel in a live systemWhen you work in. Safety EXTRA low voltage SAFETY LOW VOLTAGESELV security authority will be the voltage is defined as: every person can reach and .will not cause injury to the highest voltage, the voltage value to 30Vac or 42.4Vdc. Set the precision SETPOINT ACCURACY requirement of actual output voltage and output voltage of the ratio. Arrange procedure SEQUENCING in multiple output power supply, to establish the order of the .output circuit power supply. Soft start and SOFT START just power up the power supply output voltage to rise gradually. This approach limits the input inrush current..