Dynamax AVRD 3.2 설치 및 운영 매뉴얼 - 페이지 3

{카테고리_이름} Dynamax AVRD 3.2에 대한 설치 및 운영 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Dynamax AVRD 3.2 12 페이지. Voltage regulator

1.0 Introduction to AVRD

The adjustable - regulated power supplies in the electronics industry are seldom available

for field applications, yet is possible to find adjustable versions, which are good for small

labs and indoor application. In these cases the voltage regulation may be good, and the

voltage adjustment may be within the range, however if AC power is lost for a few moments,

again there is certainly a loss of data as well as false readings due to the heat lost during

a brownout. Thus the best field solution is to have a battery charging source or solar panel

supplying current to a suitable battery, which in turn supplies the datalogger with a primary

(or backup) source of power, and then regulate the battery output to the sensors as needed.

In this application, the solar or battery charger source can vary significantly, the battery has

a significant reserve capacity, and yet the sensors power source is regulated and will not

fluctuate.

The new AVRD is a dual adjustable voltage regulator for supplying excitation power to

sensor heater elements. This can be used as a general-purpose regulator for powering

dc systems or for exciting sensors with voltages in the range of 1-10 VDC and current not

exceeding 5A on each channel (10A combined). Refer to specifications for more detailed

voltage and current parameters. New AVRD uses a Step-down switching controller with

external FET switch and frequency control, enabling the regulator to achieve higher current

and higher efficiency. In addition AVRD circuit is designed to dissipate the excess heat from

the switching with in the circuit thus eliminating the necessity of bulky heat sinks or cooling

systems. User can connect input source and the heater element s to the quick terminal

simply by inserting wire in the appropriate terminal slot and use screwdriver to secure the

wire properly. AVRD operates at a constant frequency of 330 KHz in the voltage range 2.5V

– 8.5V. This range being most commonly used excitation voltage for Dynamax sensors. A

constant frequency operation enables the AVRD to achieve better stability and higher input

output power efficiency.