Whistler PP150AC, PP350AC owner manual For You Technical Types Basic Operating Principles

Page 11

OPERATING PRINCIPLES

For You Technical Types.

1. Basic Operating Principles:

WHISTLER GO AC inverters work in two stages. During the first stage, the DC to DC converter increases the DC input voltage from the power source (e.g. a 12 volt battery) to 145 volts DC. In the second stage, the high voltage DC is con- verted to 110 volts (60 Hz AC) using advanced power MOS- FET transistors in a full bridge configuration. The result is excellent overload capability and the capacity to operate dif- ficult reactive loads. The output waveform resulting from these conversions is a "quasi-sine wave" or a "modified sine wave" as shown on the following page.

This stepped waveform is similar to the power generated by utilities And has a broad range of applications.

The modified sine wave produced by

your WHISTLER GO AC Inverter

18

OPERATING PRINCIPLES

The modified sine wave produced by your Whistler inverter has a root mean square (RMS) voltage of 110 volts. The majority of AC voltmeters are calibrated for RMS voltage and assume that the measured waveform will be a pure sine wave.

Consequently, these meters will not read the RMS modified sine wave voltage correctly and, when measuring your WHISTLER inverter output, the meters will read about 20 to 30 volts too low. To accurately measure the output voltage of your inverter, use a true RMS reading voltmeter such as a Fluke 87, Fluke 8060A, Beckman 4410, Triplett 4200 or any multimeter identified as "True RMS."

A true sine wave typical of home AC outlet.

19

Image 11
Contents PP350AC Introduction Hours Monday Friday Am 500 pm CTWhistler Features Table of ContentsInverter Basics Important InformationInverter Basics Operation To connect the PP350AC using the Hard Wire AdapterOperation Operation Low Battery Voltage Alarm/Shutdown Protection Additional FeaturesCare and Maintenance For You Technical Types Basic Operating Principles Operating PrinciplesOperation Summary Troubleshooting Whistler 150 Watt Inverter Specifications SpecificationsConsumer Warranty WarrantyCST