In many parts of the world, bicycles are central to the culture — both for recreation and practical transportation for everyday tasks such as shopping or commuting to and from work. Efforts to reduce CO2 emissions, concerns about climate change, and rising fossil-fuel costs in many areas (along with congested roadways) have only spurred more […]
DC motors, gearmotors offered in variety of mechanical and electrical configurations
ISL Products International Ltd. offers brushed dc and brushless dc motors which can be supplied with either planetary or spur gearheads. These fully customizable dc motors and gearmotors are built to OEMs’ exact specifications to provide a turn-key component solution in diverse and demanding security-related applications. The brushless dc motors offer superior speed and exact […]
When to use gears to change the inertia ratio of a motor-driven system
In any system where a motor drives a load to achieve precise positioning, velocity, or torque, the ratio of the load inertia to the motor inertia plays a significant role in determining the motor’s ability to effectively and efficiently control the load, especially during acceleration and deceleration portions of the motion profile. In this context, the […]
Motion Trends: New motor breeds are smart, connected, and compact
This year’s survey of trends in electric motors for motion control and automation revealed several trends and emerging developments in the use of synchronous ac motors; stepper motors, especially in closed-loop offerings; brushless motors of various types; and a smattering of specialty direct-drive offerings just making inroads. Proliferation of synchronous ac motors With construction and […]
New high-speed, compact brushless motors from Portescap
Portescap has expanded its Ultra ECTM range of brushless dc slotless motors with the introduction of the new 35ECS motor. This 2-pole motor offers ultra high speed and power (up to 330 W, max continuous) without compromising on the smooth operation and long life offered by Portescap’s brushless slotless motors. The new 35ECS motor is […]
What is plugging for electric motors?
There are generally three types of electrical braking for motors: regenerative braking, dynamic braking, and plugging. Of the three methods, plugging provides the fastest stop, but it can be harsh on both the electrical and mechanical components. Because of this, it’s the least commonly used method of braking, but it is appropriate for some applications. […]
Bodine’s SCR-rated PMDC gearmotors — for hybrid applications
To provide greater flexibility and compatibility with unfiltered SCR controls, Bodine Electric Co. now offers a new selection of 90-V and 180-Vdc gearmotors with a rated maximum armature speed of 2,500 rpm. These gearmotors are designed for “hybrid” applications that neither match the 90-V 1,725-rpm industry standard (for operation with unfiltered speed controls) nor Bodine’s […]
What are coreless DC motors?
A typical brushed DC motor consists of an outer stator, typically made of either a permanent magnet or electromagnetic windings, and an inner rotor made of iron laminations with coil windings. A segmented commutator and brushes control the sequence in which the rotor windings are energized, to produce continuous rotation. Coreless DC motors do away […]
What are wound field motors and where are they applied?
Brushed DC motors are generally available in two types, depending on the construction of the stator: permanent magnet or wound field. Both motor types use current and windings to produce a magnetic field in the rotor, but they differ in how the stator magnetic field is produced: via permanent magnets inside the stator or with […]
What’s the difference between an EC motor and a BLDC motor?
Deciphering motor terminology can be frustrating, especially when comparing the operation and performance of various motor types. For example, some motors are characterized by their speed (synchronous or asynchronous) while others are characterized by their commutation method (brushed or brushless). And then there’s the issue of whether the motor is operated with AC or DC […]
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