DM330023 Microchip Technology, DM330023 Datasheet - Page 35

• Manufacturer Part Number: DM330023
• Description: BOARD DEV DSPICDEM MCHV
• Manufacturer: Microchip Technology
• Series: dsPICDEM™r

Specifications of DM330023

• Main Purpose: Power Management, Motor Control
• Embedded: Yes, Other
• Utilized Ic / Part: dsPIC33F
• Primary Attributes: AC Induction (ACIM) Motors, Brushless DC (BLDC) Motors, Permanent Magnet Synchronous (PMSM) Motors
• Secondary Attributes: Power Factor Corrected (PFC)
• Processor To Be Evaluated: dsPICDEM
• Processor Series: dsPIC DSC
• Interface Type: RS-232, USB
• Operating Supply Voltage: 90 V to 265 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

4.1
 2009 Microchip Technology Inc.
POWER FACTOR CORRECTION (PFC) STAGE BOARD
This chapter describes the hardware components of the dsPICDEM™ MCHV
Development System.
Topics covered include:
• Power Factor Correction (PFC) Stage Board
• Power Module Stage
• Electrical Specifications
This board has two main functions; the first one is to provide the required power sup-
plies to the power module board stage. The second function is to create the power bus
rail that will be used to energize the motor through the power module.
4.1.1
The AC supply input stage of the board consists of the following components,:
• F1 –15A/250 VAC fast acting fuse (only replace with a part of the same rating)
• C1, C2 – Film capacitors to aid in the suppression of AC supply transients and to
• C3 – Film capacitor to aid in the suppression of AC supply transients.
• R1 – A metal oxide varistor located across the incoming supply lines to suppress
• L1 – 2.3 mH/15A Choke inductor for suppressing EMI
• C4 – Film capacitor to aid in the suppression of EMI
• C5, C6 – Film capacitors to aid in the suppression of AC supply transients and to
• R7 – A 1W high-voltage resistor, which acts to discharge C4
• R6 – A resistor with a negative temperature coefficient that acts to limit the surge
• BR1 – A single-phase bridge rectifier to convert the incoming AC into DC suitable
also provide a low impedance return path for any currents that flows from the
power device tabs to the heat sink and enclosure due to capacitive coupling
high energy transients.
also provide a low impedance return path for any currents that flow from the
power device tabs to the heat sink and enclosure due to capacitive coupling
of input current that would occur at initial application of power due to the dis-
charged DC bus capacitance. The initial nominal cold resistance is 1 Ohm, which
reduces once current flows and the device heats up.
for input to the power conditioning stage.
Note:
AC Supply Input
The circuits for the hardware described in this section are shown in
Appendix A. “Board Layout and Schematics”.
Chapter 4. Hardware
DEVELOPMENT SYSTEM
dsPICDEM™ MCHV
USER’S GUIDE
DS70605A-page 29