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Cs GROUP SIX

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Medical Motors

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MEDICAL APPLICATION SOLUTIONSfrom Allied Motion TechnologiesAllied Motion products power a wide variety of medical devices and

equipment. From rugged gearmotors for power wheelchairs to surgical hand

piece motors to dialysis pumps, Allied Motion products are relied upon every

day to deliver reliable performance for our medical products customers.

In MEDICAL APPLICATION SOLUTIONS we present a number of applications to

illustrate how Allied Motion products provide innovative motion solutions for

medical devices and equipment.

In addition, we include specifications for Allied Motion products that are

particularly suitable for use in medical motion applications.

Contact our application engineering team to discuss your application

requirements. We’ll help you apply our products, and if needed show you how

Allied Motion can develop a customized motion solution to meet your exact

requirements.

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Medical Application Solutions• Cardiopulmonary Heart Bypass System 2

• Medical Diaphragm Pump 2

• Dialysis System 3

• Left Ventricular Heart Assist Device (LVAD) 3

• PAP Respiratory Ventilation 4

• Programmable Syringe Pump 4

• Angiographic CT Contrast Injector 5

• Nuclear Imaging 5

• Powered Surgical Handpiece 6

• Anesthesia Gas Monitoring System 6

• Pharmacy Automation 7

• Pipetting System for Automated Blood Analyzer 7

• Pharmaceutical Vial Filling System 8

• Continuous Passive Motion (CPM) Finger Exerciser 8

• Medical Mobility-Wheelchair Lift 9

• Medical Mobility-Stair Lift 9

• Patient Handling Table 10

• Medical Mobility - Power Wheelchair 10

Allied Motion Solutions• Introduction 11

• Brushless DC Motors 12

• Servo and Torque Motors 13

• Permanent Magnet Brush DC Motors 14

• Gearmotors and Transaxles 15

• Drives 16

• Encoders 16

Contents

Cardiopulmonary Heart Bypass SystemAllied Motion designed a magnetically-coupled brushless pumpmotor to drive a disposable integrated oxygenator module, the"heart" of this innovative heart bypass system.

The optimized low-voltage winding of the motor, a version ofAllied Motion's Megaflux series, is driven by a custom-designed two-quadrant brushless drive module.

Custom Megafluxtorque motor

ECM servomotor drive

BL48 brushless motor withintegrated electronic drive

Disposable Oxygenator

Module

Medical Diaphragm PumpMedical diaphragm pumps, used to pump fluids and compressgases, benefit from the efficiency and smooth operation ofAllied Motion's small brushless motors with integrated driveelectronics.

Special bearing construction in Allied Motion's BL48 brushlessmotors easily handles the high pump loads in this applicationwhile achieving a minimum 10,000 hour service life.

Diaphragm pump operating principle

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Allied Motion Solutions: Customized to Meet Specific Requirements

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Dialysis SystemPatients with chronic kidney failure need hemodialysis (HD)therapy systems like the one shown here. Hemodialysis systemsin turn rely on peristaltic pumps to smoothly and accuratelycontrol the flow of the patient's blood and the dialysis solutionthrough the machine’s dialyzer (artificial kidney).

The key to smooth, long-life, and reliable operation of peristalticpumps as used in HD machines is the pump motor. Because oftheir efficiency, long service life, and reliability, Allied Motion’s BLseries brushless DC motors have been chosen for use in the HDsystem shown here, as well as for peristaltic pump applicationsin other types of medical equipment.

BL58 EB with gear pump

Left Ventricular Heart Assist Device (LVAD)Left ventricular heat assist devices (LVAD) are essentially bloodpumps developed to help assist the hearts of bridge-to-transplant patients and also for permanent support for end-stage heart failure patients.

In newer LVAD systems the pump is implanted in the patient,as the one shown here. This pump uses an axial flow designusing a brushless DC torque motor. The pump is powered viaa percutaneous connection toan external controller andbattery packs, enabling thepatient to be ambulatory.

Critical to the performance ofadvanced LVAD pumps arecompact, highly efficientbrushless motors, such asthose designed by AlliedMotion for LVAD applications.

Megaflux brushlessDC torque motor

BL58 EB with spurgearhead


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PAP Respiratory VentilationPositive airway pressure (PAP) respiratory ventilation is used totreat sleep apnea. All PAP systems (APAP, IPAP/EPAP) control astream of compressed air to keep the patient’s airway open sobreathing is assisted, reducing or preventing apneas.

A key element of PAP machines is the air flow generator,basically a motor-blower that is controlled to generate precisepressure levels of air, typically in the range of 4 to 20 cm H2O.

Allied Motion’s small, precision brushless DC motors such asthe BL 21 EE shown here, are an ideal choice for PAP systemsowing to their compactness, long life, and quiet operation.

BL21 EE brushless DC motor

Programmable Syringe PumpSmall portable and battery-operated syringe pumps are usedextensively to administer infusions associated with chemotherapy,post operative and chronic pain control, antibiotics and othermedications given parenterally. Typical flow rates for these typesof syringe pump can range from 0.1 to 200 ml/h, so the motorsused must have excellent speed controllability.

Miniaturization of these units for use by ambulatory patientsrequires reliable small motors like Allied Motion’s CL29 corelessDC motors, which must be highly efficient in order to preservebattery life, which are highly efficient and help conservebattery power.

CL29 coreless DC motor with S30A gearhead


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Angiographic CT Contrast InjectorContrast injectors are essential accessories for modern CTscanners. They inject X-ray contrast fluid intravenously, whichprovides dramatic improvement in the overall quality of CTimages of the circulatory system and many soft organs. Theenhanced images enable more accurate diagnoses to be made.

Allied Motion brushless servo motors and drives are used toprecisely drive the injector piston to achieve smooth, accuratefluid delivery.

EMC servo drive

QB 17 BLDC servomotor

QB 17 BLDCservomotor

Radial actuator

Nuclear ImagingSome nuclear imaging systems use Anger cameras (photo-scintillation imagers) to image radiopharmaceuticals in apatient. In positron emission computer tomography (ECT) orsingle photon emission computed tomography (SPECT) thecameras are revolved around the patient. The cameras also aretranslated radially to keep the cameras close to thepatient’s body. A fourth linear motion axis translates theentire gantry assembly horizontally for full-body scans.

Allied Motion’s Quantum series of BLDC servo motorsare an ideal choice for this application because of theirhigh performance capabilities, compact size, andunquestionable reliabilityand service life.

QB 34 BLDC servomotor


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Powered Surgical HandpieceSmall, light, efficient, high powered, well-balanced. These areextremely important characteristics of electric-powered surgicalhandpieces. In addition, surgical handtools must be ruggedand reliable, and able to withstand hundreds of autoclavesterilization cycles.

Allied Motion’s sizes 4 and 5 SLH slotless brushless DC motorsare engineered specifically to meet the performance demandsof surgical handpieces.

SLH high performance size 5 slotless BLCD motor

Diaphragm pump

Anesthesia Gas Monitoring SystemMonitoring patient respiratory gas in surgery is critical forproper anesthetic administration. The heart of anesthesia gasmonitoring systems is an “optical bench” and gas pumpsubsystem similar to that shown in the diagram.

Allied Motion supplies our small precision motors for use inAGM systems where accuracy, reliability and long life arecritical concerns of system designers.

BL48 EE brushless

BL21 EE brushless DC motor

"Optical bench"


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Pharmacy AutomationIt is estimated that every year approximately 770,000 peopleare injured or die from adverse drug events in North America.Many of those cases arise from human error in medicationdispensing. Hence, the accuracy and higher efficiency affordedby automated prescription dispensing systems represents anenormous and real benefit to pharmacies, hospitals andpatients alike.

Because of their compact size, high performance andreliability, Allied Motion's servo motor and drive systems, andsmall coreless DC and BLDC motors are well-suited forpowering automated medication retrieval and dispensingsystems like the one shown here.

CL29 coreless DC motor

EMC servodrive

QB 17 BLDCservomotor

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CL29 coreless DC motorwith S30A gearhead

Pipetting System for Automated Blood AnalyzerBlood analysis subjects samples to a sequence of steps that ifdone manually are very time-consuming. The fully automatedpipetting subsystem shown here speeds theanalysis. In this subsystem a set of pipettes ispositioned to aliquot blood samples fromprimary test tubes and deposit them insecondary tubes. This subsystem must notonly be fast but also accurate and smooth inhandling the samples.

Allied Motion’s small CL29 coreless DCmotors with gearheads drive miniatureleadscrews to withdraw or deposit preciseamounts of fluid from or to the sampletubes, respectively. Quantum series servomotors power the X-Z mechanical translationsystem that precisely positions the pipettingsystem during operation.

QB23 BLDCservomotor


Continuous Passive Motion (CPM) Finger ExerciserRehabilitation of joints and associated tendons can beexpedited using motorized robotic devices that continuouslyexercise the affected digits. Such devices must be easy to use, lightweight, battery powered for ambulatory patients, and enable precise, controlledsmooth movements.

The hand and finger exercisershown here employs an AlliedMotion CL40 coreless DC motorcoupled with an efficient S38spur reduction gearhead. Thegearmotor drives a smalltelescoping leadscrew linearactuator, which reciprocally drivesa glove-like assembly that holdsthe patient’s hand. The result issmooth and continuousextension and flexure of thepatient’s joints.

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Pharmaceutical Vial Filling SystemSterile filling of vials with medications, reagents, cytotoxicagents and other medical liquids requires automated fillingsystems like that shown here. An X-axis linear stage carries aY-axis stage to quickly and precisely increment filler tubes overan array of vials. A peristaltic pump meters precise volumes ofthe fill liquid to the filler tube manifold.

Allied Motion’s Quantum servo motors and a BL48 EB BLDCpump motor proved to be well-suited to therequirements of this demanding application.

BL48 EB brushlessDC motor

QB17 BLDC servomotor

Peristaltic pump

CL40 coreless DC motor


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Medical Mobility – Wheelchair LiftTransporting and handling medical equipment is eased byspecialized equipment designed for the purpose. An exampleis the mobile power wheelchair lift shown here.

Allied Motion’s motors and gearmotors, such as the RA30 DCgearmotor used in this lift, provide trouble-free long-lifeservice for durable medical equipment OEMs.

PLC 30 DC gearmotor

Medical Mobility – Stair LiftAll powered medical access and mobility equipment like thestair lift shown here are expected to operate quietly andreliably over many years of hard, daily use.

That’s why the manufacturers of this type of equipmentdemand rugged, reliable motor drives like Allied Motion’smodel PL30 parallel-shaft DC gearmotor.

RAB 30 DC gearmotor


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Patient Handling TableBeing able to easily get onto an exam table increases thecomfort of all patients during an exam, especially the elderly,the disabled, and children, helping the physician conduct amore thorough and accurate exam. A new generation ofpowered exam table shown here allows the patient to sit as ina chair. The table back is then lowered and the table baseraised to the usual exam table positions.

Allied Motion’s Endurance PJ series of DC motors power theback and base linear actuators in this new exam table,providing reliable, smooth, and quiet actuation of the table.

Endurance PJ PMDC motor

Medical Mobility – Power WheelchairAllied Motion gearmotor power drives and transaxles providedependable, long-life service for powered wheelchairs, asshown here, as well as scooters and other battery-poweredmedical mobility equipment.

Their overall ruggedness and "no-leak" gear boxes are two ofthe features of Allied Motion's gearmotors that set them apartfrom competition.

RA35 wheelchair DC gearmotor


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Allied Motion Motors: With or Without Electronic Drives...

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Allied Motion Drives and Encoder Solutions

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