© 2005 Microchip Technology Inc.

DS93001A-page 5

GS153

FIGURE 5:

dsPICDEM™ MC1H 3-

PHASE HV MODULE

dsPICDEM MC1H 3-Phase High-Voltage

Power Module

The high-voltage module (Figure 5) connects to an

MC1 board to form a high-voltage BLDC motor control

system. The dsPICDEM MC1H 3-Phase High-Voltage

Power module offers high-voltage isolation, as well as

Fault, overcurrent and overvoltage protection. Each

phase is monitored with fast current sensors and a

robust latching network to disable the outputs in case

any Fault condition occurs. This protection is neces-

sary during code development and prevents accidental

destruction of the drive circuitry due to inadvertent

software issues.

The high-voltage module rectifies a single-phase wall

input voltage of 110 VAC to generate a DC bus voltage

of 165 VDC. Alternatively, it can also rectify an input

wall voltage of 220 VAC to get a DC bus voltage of

330 VDC. This DC bus voltage is then converted to

drive a 3-phase motor.

The hardware can be used to drive ACIM and BLDC

motors. For complete details on the features and

capabilities of this module, refer to the “

dsPICDEM™

MC1H 3-Phase High-Voltage Power Module User’s

Guide” (DS70096).

FIGURE 6:

dsPICDEM™ MC1L 3-PHASE

LV MODULE

dsPICDEM MC1L 3-Phase Low-Voltage

Power Module

The low-voltage module (Figure 6) connects to an MC1

board to form a low-voltage BLDC motor control

system. The dsPICDEM MC1L 3-Phase Low-Voltage

Power module offers voltage isolation, along with Fault,

overcurrent and overvoltage protection. Each phase is

monitored with fast current sensors and a robust latch-

ing network to disable the outputs in case any Fault

condition occurs. This protection is necessary during

code development and prevents accidental destruction

of the drive circuitry due to inadvertent software issues.

DC voltage is supplied externally from a power supply.

This DC bus voltage is then converted to drive a 3-phase

motor.

The hardware can drive 3-phase low-voltage BLDC

motors. For more details on the features and cap-

abilities of this module, refer to the

“dsPICDEM™

MC1L 3-Phase Low-Voltage Power Module User’s

Guide (DS70097).