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How Power Inverters Work
There are two stages in which a power inverter changes the 12 volt DC (or battery)
power into 220v AC (household current).
STAGE1:
The inverter uses a DC to DC converter to increase the DC input voltage from the
power source to 145 volts DC.
STAGE2:
The inverter then converts the high voltage DC into 220v AC (household current),
using advanced MOSFET transistor in a full bridge configuration. This design
provides all PowerBright inverters with the capability to start and run difficult reactive
loads, while providing excellent overload capability. The waveform that is generated
by this conversion is a "modified sine wave" as shown in the diagram below.
1500 WATT POWER INVERTER MODIFIED
The modified sine wave produced by PowerBright inverters has a root mean square
(RMS) voltage of 220 volts. The majority of AC voltmeters are calibrated for RMS
voltage and assumes 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 the inverter output, the meters will read about 20 to 30
volts too low. To accurately measure of the output voltage of the 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."
