EASY-DRIVER – User’s Manual
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This output stage is based on a full-bridge topology that allows smooth zero-
crossing behavior to the unit and full bipolar operation.
3.2
Internal Protections
Each EASY-DRIVER module is equipped with multiple internal protections
(hardware and software) to avoid unwanted behaviors or eventual damages to the unit
and also to let users run the power supply safely.
All hardware protections installed are here listed:
•
Input AC Fuse;
•
Over-voltage clamping;
Several software protections, some of them redundant, are also implemented and
here listed:
•
DC-Link under-voltage protection;
•
MOSFETs over-temperature;
•
Shunt resistor over-temperature;
An overview of all available protections, as well as a brief description of their
behavior, is presented in the following sections.
Input AC Fuses
The module input current is limited by two mains fuses.
Over-Voltage Clamping
The over-voltage behavior obtained from the energy stored by a large inductive
load is heavily limited by a clamp power circuit rated at 110 % of DC-Link voltage.
DC-Link Under-Voltage
The DC-Link under-voltage protection operates whenever the DC-Link voltage,
monitored by an internal 12-bit ADC, drops below a user-definable threshold.
