Pwm Signals - HEIDENHAIN iTNC 530 Service Manual

1.3

PWM Signals

Digital axes and spindles are driven with PWM signals.
PWM is the abbreviation "Pulse Width Modulation". The information (speed, torque) for the
output stages is converted into a pulse and pause ratio.
The PWM signal is generated in the HEIDENHAIN control and is transferred to the inverter via
PWM interfaces.
PWM
The output signal of the current controller is compared to a delta voltage (e.g., 5 kHz fixed
frequency) to create the PWM signal. At each interface of the current controller signal and the
delta voltage there is a switchover from pulse to pause.
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