Technogym JOG EXCITE - AT Driver Board

JOG EXCITE: Service & Maintenance Manual - rev. 1.1
Page 3.4
> it supplies the tread belt motor with a variable-frequency sinusoidal voltage: varying the
frequency varies the speed of rotation of the motor, and consequently the speed of the tread
belt;
> it exchanges, over the RS-485 serial link to the display board, the error signals pertaining to
the tread belt and elevation motors;
> it exchanges, over the RS-485 serial link to the display board, the commands for viewing
and configuring the inverter parameters;
> it exchanges, over the RS-485 serial link to the display board, the commands for viewing
the errors logged by the inverter.
• Receives the mains voltage at its inputs and outputs the DC supply voltages for the machine
circuit boards listed below:
Supply voltage Connector Description
+24 Vdc XU1 Power supply for the fans of the electrical box
+5 Vdc XU1 Power supply for elevation motor encoder
+12 Vdc XU2 Power supply for display
The board includes the following indicator LEDs:
LED name Color Description
H2 green +5 Vdc
H3 green +12 Vdc
H4 green +24 Vdc
H5 red 400 Vdc
It contains:
• The AT driver board
• The AT power supply board
• 2 fans
• A breaking resistor
3.1.8.1. AT driver board
It is the upper board of the assembly and it is the heart of the driver: it does everything was
described above for the AT driver except the function of the AT power supply board described
below. In details:
• It receives the line voltage and, through a PFC module, it rectifies the voltage to the 400 Vdc
used to generate the 3 phase voltage for the belt motor and to power up the AT power supply
board.
• Internally it houses an inverter to control the belt motor;
• Internally it houses a DC driver to control the elevation motor.