Technical Specifications; Theory Of Operation - ConMed Advantage Instruction Manual

5.0

TECHNICAL SPECIFICATIONS

5.1

Theory of Operation

The Advantage, PowerPro and E9000 Control Board and Power Supply/Pump Controller provide the
necessary controls for the user to operate the handpieces. The Control Board main function blocks are
a housekeeping DC/DC converter, a Motorola 68HC11 micro-controller, and a Unitrode UC3625 DC
three-phase brushless motor controller.
The housekeeping DC/DC converter on the Power Supply/Pump Controller provides voltages
necessary to operate the Control Board and handpiece electronic components. The +50VDC motor
voltage is converted to +5VDC, +6VDC and +12VDC, facilitated by a Unitrode Pulse Width
Modulator, UC3843 and a Flyback conversion topology. The +50VDC motor voltage is applied to
transformer primary T1, storing energy in its inductance. After a set amount of time, the voltage is
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removed from the primary and the stored energy is transferred to the secondary windings to provide
necessary housekeeping output voltages.
The 68HC11 micro-controller gives the Control Board the decision making necessary to operate the
handpieces. Speed, direction, cable mode select, DIP switch settings, identification and front panel
controller display are only a few functions that interface with the 68HC11, which is an 8 bit micro-
controller operating with 8 MHz clock speed. It contains multiple input and output ports that can be
manipulated via a software program, which is contained in an EPROM and provides extended inputs
and outputs to the 68HC11.
The DC three-phase brushless motor controller, is a mixed signal device that provides commutation
and motor driver control. This device provides outstanding closed loop speed control and adds
protection to the output three phase driver by limiting peak switch current. This device allows an
electronic commutation scheme needed to commutate the DC three phase motor.
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