Microchip Technology dsPICDEM MCHV-3, Руководство пользователя, Страница: 47 / 68

Hardware
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2016 Microchip Technology Inc. DS50002505A-page 47
3.3 ELECTRICAL SPECIFICATIONS
The maximum power and current capability of the system is dictated by the allowable
temperature rise of the different components. Establishing maximum limits is not
simple, given the different ways the user may use the system. The voltage and the
nature of the electrical load used, both affect the dissipation that occurs. In determining
the allowable limits for the power semiconductors, the following assumptions have
been made:
• Heat sink is at 70°C (worst case)
• Thermal resistance of the insulating thermal pad is 3°C/W
TABLE 3-7: INVERTER ELECTRICAL SPECIFICATIONS
TABLE 3-8: PFC ELECTRICAL SPECIFICATIONS
Parameter Min Typ Max Units
DC Bus 40 310 400 V
DC
Current 0.1 6.5
( 1 )
10
( 1 )
A
Power Rating 4 2015
( 2 )
4000
( 2 )
Watts
Switching Frequency 0 — 20 kHz
Note 1:
The system is continuously operated during one hour; 15 kHz switching frequency
and the PFC boost circuit are disabled.
2:
It is possible to increase the available maximum output power, up to 4000W, by
using an external ventilation mechanism attached to the system near to the power
module. To provide additional air flow, a conventional AC muffin fan can be used
(Comair-rotron Part Number 028021 or 028023). An alternative bonded fin heat
sink with fans attached is also an option (C&H Technology, Inc.
Part Number CH5117F).
Parameter Min Typ Max Units
DC Bus 90 380 400 V
DC
Current 0.1 2.1 2.5
( 1 )
A
Power Rating 9 800 1000W
( 2 )
Watts
Switching Frequency 0 50 100 kHz
Note 1:
The system continuously operated during one hour; 50 kHz switching frequency.
2:
It is possible to increase the available maximum output power, up to 1000W, by
using an external ventilation mechanism attached to the system near to the PFC
IGBT. To provide additional air flow, a conventional AC muffin fan can be used
(Comair-rotron Part Number 028021 or 028023). An alternative bonded fin heat
sink with fans attached is also an option (C&H Technology, Inc.
Part Number CH5117F).