CPWR-AN26, Rev A, 08-2018
Copyright © 2018 Cree, Inc. All rights reserved.
The information in this document is subject to change without notice.
Cree and Zero Recovery are registered trademarks, and the Cree logo and C3M are trademarks, of Cree, Inc
You should use each of the items summarized below when operating this board. The board
may not operate properly if you fail to use them.
AC Input Source:
an isolated variable AC source capable of supplying between 90 VAC and 265
VAC and at least 7000 W capacity.
Output Load:
A programmable electronic load or a resistor bank capable of operating at 250 V
to 450 V and 25 A of current.
Power Meter:
a YOKOGAWA WT 1800 power analyzer or any other power analyzer with same
specifications.
MCB:
Single phase MCB (Miniature Circuit Breaker) rated for 415 V, 32 A
Multimeters:
Two digital multimeters (DMMs) to measure the regulated output voltage and the
input RMS (Root Mean Square) voltage.
Oscilloscope:
A digital or analog oscilloscope (300MHz or higher ideally) and differential voltage
probes (100Mhz or higher ideally) plus isolated current probes (i.e. hall effect).
Power supplies:
1) 7V, 1A for control board
2) 15V, .5A for gate drivers on primary side (PFC + input H bridge)
3) 15V, .5A for gate drivers on secondary side (H bridge)
4) 24V, 2A for cooling fans
All power supplies must have isolated grounds.
External Fan:
a small air flow to the top side of control board, as the boost inductor can get very
hot.
Wire Gauge:
A minimum of (American Wire Gauge) AWG #10 wire is required for the input and
output connections. Each of the wire connections between the AC source and the reference
design board, and the wire connections between the reference design board and the load, should
be less than two feet long.
