User Manual

Table Of Contents
Power Output Circuit Operation
Advanced Digital Motor Controller User Manual 85
SECTION 7
Motor Operating
Features and
Options
This section discusses the controller’s operating features and options relating to its motor
outputs.
Power Output Circuit Operation
The controller’s power stage is composed of high-current MOSFET transistors that are
rapidly pulsed on and off using Pulse Width Modulation (PWM) technique in order to deliv-
er more or less power to the motors. The PWM ratio that is applied is the result of a com-
putation that combines the user command and safety related corrections. In closed-loop
operation, the command and feedback are processed together to produce the adjusted
motor command. The diagram below gives a simplified representation of the controllers
operation.
Motor
Command
Acceleraton
Decceleration
Channel
Mixing
Short
Detect
Channel
Mixing
Safety
Checks
Power
Output
Motor
Outs
Commands
Feedback
Estop,
Limit Switches,
...
Amps
Temperature
Voltages
ConfigurationConfigurationConfiguration
Configuration
Configuration
Configuration
PWM
FIGURE 7-1. Simplified diagram of power output operation