The schematic of a PMSM drive using a DTC-based speed loop PDFF controller is shown in Fig. 1. This DTC scheme is implemented in stator flux frame, which requires knowledge of stator flux in ...

A brushless-DC motor is common in ceiling fan and pan-tilt-zoom (PTZ) camera designs. But you can’t use the same brushless-DC motor solution for both of these end products. A ceiling fan driver ...

Prior to the advent of the adjustable-speed drive (ASD), the polyphase induction motor operated as a constant-speed motor. Figure 1 shows the well-known torque and current curves versus speed for the ...

A new direct drive now offers a large opening with a diameter of 40 mm and, thanks to stepper motor technology, achieves a balanced combination of speed and torque with low weight and volume. There ...

There's no better way to meter precisely the right amount of torque to each corner of a vehicle than assigning each wheel its own electric motor. But that's way too expensive for everyday vehicles, so ...