The precise meaning of the term ‘servo’ in the context of motors and drives is difficult to pin down. Broadly speaking, if a drive incorporates ‘servo’ in its description, the implication is that it ...

If the source of supply is d.c. (for example in a battery vehicle or a rapid transit system) a chopper-type converter is usually employed. The basic operation of a single-switch chopper was discussed ...

Industrial applications use direct current motors because the speed-torque relationship can be varied to almost any useful form -- for both motor and regeneration applications in either direction of ...

Sizing a DC motor to accurately meet a set of requirements can be a thankless task. Sizing a DC motor to accurately meet a set of requirements can be a thankless task. Having to choose between ...

Electronic motor drives seem to be everywhere, but do you really know what they are or how they work? Electronic motor drives fall into one of two categories: AC and DC. AC motor drives control AC ...

Small and powerful DC motors are critical to the development of ever more highly integrated systems. These motors are driving technology in many different sectors, from medical and laboratory ...

EPC9176 is a GaN-based three-phase inverter with a 81 x 75 mm footprint (with connector) that can operate across 20 to 80V and up to 20A (28A peak). “This voltage range and power level makes the ...

Speed control of an AC motor requires a three phase supply that can vary both voltage and frequency. Such a supply creates a variable speed rotating field in the stator that allows the rotor to spin ...

Alex Lidow and Marco Palma look at the value of high-frequency motor drives, their advantages and the capabilities of GaN technology, which make them suitable for today’s demanding applications.