Megamic Electronics has developed an Active Rectifier Regulator to provide constant DC output from permanent magnet alternators, which otherwise cannot regulate output due to lacking a field winding. The regulator consists of an Active Rectifier Controller and customized Power Stack. The controller controls the power stack to provide regulated output for a wide range of alternator speeds and loads. It offers protections, monitoring, and adjustable output voltage. The power stack is custom designed for each alternator's voltage and power rating to provide regulated DC output.

1. MmE-ACTREC-PPP-VVV
Megamic Electronics Pvt Ltd Date 1-02-2017 Doc ActRect_MODEL_00.pdf
www.megamic.in
Active Rectifier Regulator for
Permanent Magnet Alternators
Active Rectifier Regulator
Conventional alternators have a field winding which can be used to regulate the
alternator output. PM Alternators use permanent magnets instead of a field winding and
operate at higher power-size ratios, compared to conventional designs. However, as
they lack a field winding, they cannot be regulated to provide a constant output for
electrical load and speed variations.
MEGAMIC’s Active Rectifier Regulator converts the unregulated AC output of the PM
Alternator to provide a constant DC output, irrespective of variations in the speed of the
alternator or the loading conditions.
The Regulator consists of two modules
 Single-board Active Rectifier Controller
 Active Rectifier Power Stack, customized for the Power rating of the
Alternator

2. MmE-ACTREC-PPP-VVV
Megamic Electronics Pvt Ltd Date 1-02-2017 Doc ActRect_MODEL_00.pdf
www.megamic.in
Active Rectifier Controller
 Controls the Power Stack to provide Regulated DC Output for wide range of
PM Alternator speed and Load conditions
 Universal – PM Alternators over wide VA Ratings can be Regulated
 Output Voltage Adjustable over +/- 10% range using Potentiometer
 Load Current and Battery Current Sensing with Independent Programmable
Current Limits
 Protections
o Short Circuit
o Overload
o Input Under & Over voltage
o Two Thermal Trips (can be used to monitor Alternator and Power
Stack temperatures)
 Alternator Phase Voltage Monitoring and Trip in case of Phase failure
 Alternator Speed Measurement
 LCD Display and Keypad (optional)
 1 Potential-free Contact Output (can be used to turn on external System Fans
during High Temperature condition)
 Designed for High Reliability
 Compact, Single-Board Solution
 Operating Ambient Temperature: 0 C to 50 C
Active Rectifier Power Stack
 Power Stack is Custom designed for every Alternator VA Rating, and Output
Voltage, including Inductor Magnetics design
 Stack provides Regulated DC Output for wide range of PM Alternator speeds
and Load conditions
 Separate Load and Battery Outputs with Independent, Programmable
Current Limits
 High Efficiency, typically > 95%
 Non-Isolated Output
 Heatsink Temperature Monitoring
 Forced Air, Convection-cooled, Water-cooled thermal solutions

3. MmE-ACTREC-PPP-VVV
Megamic Electronics Pvt Ltd Date 1-02-2017 Doc ActRect_MODEL_00.pdf
www.megamic.in
Active Rectifier Controller Board