OPERATING PRINCIPALS2322OPERATION
radiat ors or ot her sources of heat. Do not place the
inverter in direct sunlight.
• VENTILATION. In order to disperse the heat generated
while the inverter is in operation, keep it well ventilated.
While in use, maintain several inches of clearance around
the top and sides of the inverter.
• FUMES & GASES. Avoid using the inverter near
flammable m aterials. Do not place the inverter in
areas such as battery compartments, where fumes or
gases may accumulate.
For You Technical Types.
1. Basic Operating Principles:
Whistlerinverters 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 converted to 110
volts (60 Hz AC) using advanced power MOSFET transistors
in a full bridge configuration. The result is excellent overload
capability and the capacity to operate difficult 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 Inverter
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."
For more information on inverters see our Inverter FAQ page
at www.whistlergroup.com/faq-inverters.asp
0
115 volts RMS
145 volts peak