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A stepper motor, also known as step motor or stepping motor, [1] is a brushless DC electric motor that rotates in a series of small and discrete angular steps. [2] Stepper motors can be set to any given step position without needing a position sensor for feedback. The step position can be rapidly increased or decreased to create continuous ...
High response rate and fast distortion of the crystals also let the steps happen at very high frequencies—upwards of 5 MHz. This provides a maximum linear speed of approximately 800 mm per second, or nearly 2.9 km/h. A unique capability of piezoelectric motors is their ability to operate in strong magnetic fields.
In 1973, inventors Hi D Chai and Joseph P Pawletko from International Business Machines Corp patent a "Variable reluctance linear stepper motor". Then a linear stepper motor of the variable reluctance type was for serial printer applications. In 1977 J.W. Finch researcher on the Linear Vernier Reluctance Stepper Motor to replace a mechanical ...
Switched Reluctance Motor Drives; Real-Time Simulation and Control of Reluctance Motor Drives for High Speed Operation with Reduced Torque Ripple; Torrey – Switched reluctance generators and their control DOI: 10.1109/41.982243; Asadi – Development and application of an advanced switched reluctance generator drive; SR database archive
Reluctance motors can deliver high power density at low cost, making them attractive for many applications. Disadvantages include high torque ripple (the difference between maximum and minimum torque during one revolution) when operated at low speed, and noise due to torque ripple. [1]
Two Familiar New Engines. Under the hood, the 2025 4Runner's base engine is the 2.4-liter i-Force, a turbocharged inline-four that makes the same 278 horsepower and 317 pound-feet of torque it ...
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