Portescap in Motion

Power density is the amount of power (time rate of energy transfer) generated per unit volume of the motor. The more powerful the motor in a smaller envelope, the higher the power density. Volume power density is an important consideration where space is constrained or where maximum output is needed in a fixed space. High power density enables miniaturization of applications and end devices or higher capability in current devices.

When selecting a motor for your application, one piece of reference information that can be used to make your selection is the speed vs torque curve.

As discussed in our collaboration post, early engagement leads to customized motors that are optimized for your application, but additional benefits can be realized utilizing Portescap’s Engineering expertise. Discussions will focus on the motor solution but routinely extend to the sub-assembly where the motor will reside. These early meetings can resolve challenges an Engineer may face around material selection and additional mechanical components.

Motor efficiency is the ratio between power output, which is mechanical, and power input, which is electrical.  Losses exist in all motors due to friction, heat, and materials, to name a few factors, so minimizing these losses is critical for applications that run off a battery.  The higher the efficiency of the motor, the longer the battery life during operation which results in longer time between charging.

Are you an original equipment maker [OEM] looking for a specific motion control solution for your end application? Portescap caters to miniature motor requirements of a wide range of medical, diagnostic and industrial applications. This ranges from medical and surgical tools, lab automation equipment, dental drills and textile yarn guides to humanoid robots, surveillance camera systems, aircraft seat actuation, tattoo machines, and more. We help OEMs select the “right” miniature motor to power their applications. Our solutions include miniature dc and bldc motors, miniature can stack steppers and disc magnet motors as well as linear actuators with gear composite. These are usually customized to varying degrees, to suit requirements of the end application.

Since our motors are exposed to diverse operating conditions, selecting the right motor can be a daunting task. Certain applications need motors that can operate at extreme temperature ranges, whereas in some cases, OEMs are looking for motors with ability to withstand shocks and vibrations. Parameters like “length”, “diameter”, “torque”, “speed”,  “power density” etc  play an important role in motor selection. Thus, we’ve provided our clients and prospects with an online platform - MotionCompass^TM, that helps them select the best-suited motor for their application.

Read: Part I  |  Part II

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The thermal data given in our catalogue may be indicative, and it should always be confirmed whether the heat dissipation in a given application is actually better and stable. As per the speed-torque curve in Portescap’s catalogue, there is a temporary working range in which we can overload the motor for a small time span. However we should always confirm what that time span should be, and it all really depends on motor size and design. There is a definite time span for every motor size, and this limitation comes from the coil temperature and more precisely, how fast the motor coil or winding heats up.

Read: Part I  |  Part III

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Now we shall consider the motor speed against an application. We need a motor such that higher limit of its permissible speed should be higher than the operating point of the application. Maximum permissible limit corresponds to upper limit of operating range diagram. This speed limit can be found in our catalogue.

Read: Part II  |  Part III

Portescap offers miniature motor technologies to solve the motion needs of end markets. Our typical markets can range from motors for medical devices to various industrial applications. We serve our customers through innovative product technologies encompassing brushless miniature DC motors, brush DC & can stack motors, disc magnet motors and stepper linear actuators, to optimize their application performance.