Inverter Protec
ƟŽn Features
Note
x
How Power Inverters Work
There are two stages in which a power inverter changes the 12-Volt DC (or ba
Ʃ
ery) power into 110V AC
(household current).
STAGE 1:
The inverter uses a DC-to-DC converter to increase the DC input voltage from the power source to 145 volts DC.
STAGE 2:
The inverter then converts the high voltage DC into 110V AC (household current), using advanced MOSFET (Metal-
oxide-Semiconductor Field E
ī
ect Transistor) transistors in a full bridge con
Į
gura
Ɵ
on. This design provides all our
inverters with the capability to start and run di
ĸ
cult reac
Ɵ
ve loads, while providing excellent overload capability.
The waveform that is generated by this conversion is a
ΗŵŽĚŝĮ
ed sine wave" as shown in the diagram below.
This
ŝŶǀĞƌƚĞƌŝƐĞƋƵŝƉƉĞĚǁŝƚŚĂĐŽŽůŝŶŐĨĂŶǁŚŝĐŚǁŝůůƌƵŶĐŽŶƟŶƵŽƵƐůLJǁŚĞŶůŽĂĚŝƐĂƉƉůŝĞĚ͘
Th
ŝƐŝŶǀĞƌƚĞƌŚĂƐƉƌŽƚĞĐƟŽŶĂŐĂŝŶƐƚŝŶƉƵƚƵŶĚĞƌǀŽůƚĂŐĞ͕ŝŶƉƵƚŽǀĞƌǀŽůƚĂŐĞ͕ŽǀĞƌůŽĂĚ͕ĞdžĐĞƐƐŝǀĞƚĞŵƉĞƌĂƚƵƌĞĂŶĚ
ƐŚŽƌƚĐŝƌĐƵŝƟŶŐ͘/ŶĂŶLJŽĨƚŚĞĂďŽǀĞŽĐĐƵƌĂŶĐĞƐ͕ƚŚĞŝŶǀĞƌƚĞƌǁŝůůƐŚƵƚĚŽǁŶĂŶĚĂŌĞƌƚŚĞƉƌŽďůĞŵŚĂƐďĞĞŶ
corrected, the inverter can be restarted.
x
9
The modi
Į
ed sine wave produced by our inverters 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 modi
Į
ed 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,
Triplet 4200 or any mul
Ɵ
meter iden
ƟĮ
ed as "True RMS"