Contents
What is a current mode PWM controller?
Glossary Term: Current Mode PWM Definition. A DC-DC switching regulator which regulates its output voltage by varying the peak inductor current on a cycle-by-cycle basis to output a regulated voltage despite variations in load-current and input-voltage. Synonyms. Current-Mode Controller.
Is Pulse an AC?
Pulsed DC is commonly produced from AC (alternating current) by a half-wave rectifier or a full-wave rectifier. Like an AC wave, the voltage of a PDC wave continually varies, but like a DC wave, the sign of the voltage is constant. Pulsating direct current is used on PWM controllers.
How is motor current measured in a PWM power amplifier?
Almost any modern motor controller (like the maxon product lines EPOS, ESCON, MAXPOS) use a so-called chopped PWM power amplifier to drive the motor, i.e. to provide the required motor current depending on the operating mode, the controller state, and working point. maxon controllers measure the motor current directly in the power amplifier.
How does a PWM based AC power control work?
If the switch is ON (or closed) for 2 seconds and OFF (or open) for 2 seconds, then the power consumption is reduced by 50%. If the switching action is so fast that it is not detected by the human eye, then the light bulb will appear as it is continuously glowing with half the luminance and consuming only 50% power.
Can a PWM be measured at 100 kHz?
The drawback is that these expensive precise current clamps (or current probes) for phase currents of up to 10A or even more and 100 kHz PWM are often not part of the standard measurement equipment.
Can a PWM amplifier be considered as an electronic transformer?
The motor current measurement by the motor wires is quite demanding concerning the required measurement equipment and procedure. The different possibilities, typical procedures, and the required measurement equipment is explained by the following paragraphs. A PWM amplifier can be considered as some sort of electronic DC transformer.