The basic operation of an electric motor relies on the interaction between the rotor’s permanent magnets and the stator’s energized windings. But even when the motor is not powered and no current is flowing though the windings, there is a magnetic attraction between the permanent magnets of the rotor and the ferromagnetic teeth of the […]
Search Results for: torque ripple
FAQ: What are ways to avoid torque ripple in DC motors?
Torque ripple—variations in torque production during shaft revolution—is an undesirable effect that occurs in permanent magnet motors, preventing smooth motor rotation. Torque ripple is generally defined as non-linear torque production of an energized motor. Cogging torque—a phenomenon similar to torque ripple—is torque produced by the attraction between the permanent magnets of the rotor and the […]
Nippon Pulse introduces new high-resolution, high-torque miniature AC servomotors
Nippon Pulse America, Inc. is pleased to introduce its new series of high-performance micro direct-drive (MDD) AC servomotors. The new MDD motors will join Nippon Pulse’s existing line of Linear Shaft Motor servomotors. Each compact MDD motor comes with a built-in high-performance encoder (either absolute or incremental) that enables direct fine positioning. The motors are […]
High torque rotary voice coil actuators
H2W Technologies has developed several high torque rotary voice coil actuators, otherwise known as a limited angle torque motors or LATs. The model TWR-015-346-2RC was designed to allow for a low moving mass (68 grams per coil) and inertia, as well as dual independent coils to allow for two independent motion profiles or couple the […]
Synchronous EMF torque motors: New alternative for elevators and more
20 years ago, engineer Michael Prokopp co-developed a type of new electric motor to outperform traditional motors. Now sold through startup EMF97 Gmbh, this synchronous torque motor reaches high torque at low speeds and is more efficient than many traditional motors. While leading manufacturers in this industry get 76% efficiency from comparable motors, the EMF motor […]
New high torque density motor from ThinGap
ThinGap has developed the first member of a new motor family of high performance and extremely high peak torque density brushless PM motors reaching over 20 Nm/kg. The frameless LSI 105 torque motor model is 105 mm OD (4.125 in.) 25.4 mm (1.0 in.) long. Continuous torque reaches over 2 Nm (283 oz-in.) in typical […]
Short axial length, high-torque brushless motors from Koford
Koford Engineering offers a new line of 10-pole 5.07-in. (129 mm) brushless high performance motors with continuous stall torque up to 398 oz-in. with heat sink, and peak motor efficiency of 94%. The motor features low cogging for a slotted motor and a sinusoidal back emf for low torque ripple when used with sine drives. […]
FAQ: How do stepper drives and motors get smooth motion and consistent torque at low speed?
Smooth operation at low speeds with consistent torque is possible using stepper motors and drives. It is accomplished by ensuring the drive and motor work together, and often by using microstepping. Microstepping is driving the stepper motor such that each pulse does not complete a full step. Rather, a partial step occurs. This allows the […]
Compact, high-torque brush DC motors from Pittman Motors
Pittman Motors, a business unit of AMETEK Precision Motion Control, introduces the DC032A Series of brush DC motors, the latest addition to its broad range of DC brush and brushless motors. The DC032A series is a high torque density motor designed in a rectangular package. Its compact size and high-power density makes it especially suitable […]
Comparing stepper and brushless dc motors
A comparative study of stepper vs. brushless dc motors reveals the pros and cons of both motor types. Charan Bhamra Mechatronics Engineer EZmotion For engineers and designers working on modern-day motion and other industrial applications, it’s vital to understand the advantages and disadvantages of stepper and brushless dc (BLDC) motors. Here we’ll look at a […]
