HD22020-3 EMERSON Power Module
⇒ Click here for good price HD22020-3
|Alternate Part Number||HD22020-3|
33.0 cm x 25.4 cm x 5.1 cm
The Emerson rectifiers comprise two parts: 3phase passive PFC and
DC/DC converter circuit. Besides, there are the auxiliary power
supply and the I/O detection protection circuit. The operation
principle of rectifiers is shown in Figure HD22020-3
The 3-phase passive PFC circuit at the front-end comprises input
EMI and passive PFC, which are used to rectify and filter the AC
input, and to calibrate the input current, so as to ensure that the
power factor of the input circuit is bigger than 0.94, meeting the
related EMI and EMC standards in GB/T 17794.2.2-2003, as well as
the 3-phase harmonic standard in DL/T781-2001.
The DC/DC converter circuit at the back end uses PWM generator to
control the PFC-output DC voltage, and output DC voltage through
high frequency transforming, rectification and filtering. It is
used to convert the rectified voltage from the front end into the
steady DC voltage output as required by the power system.
The auxiliary power supply is located between the input passive PFC
and the DC/DC converter. It uses the DC output from the 3-phase
passive PFC and powers the control circuits.
The input detection circuit can detect input over/under-voltage and
phase failure, while DC/DC detection circuit can detect output
voltage/current and heat sink temperature. All these signals are
used for the control and protection of DC/DC conversion.
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