1. IN RUNNER VS OUT RUNNER BLDC MOTOR

2. Hello!
Group Members
2015-MC-26
2015-MC-31
2015-MC-35
2015-MC-38

3. Brushless DC Motor
Brushless DC Components
Stator
Rotor

4. Types Of BLDC Motor OUT RUNNER BLDC INNER RUNNER BLDC
Outside in Motor(Outer Rotor and Inner Stator)
Permanant Magnent Rotor
Iron cored Stator winding
INNER RUNNER BLDC
Inside Out Motor(Outside Stator and Inner Rotor)
Ironless Core Stator Winding
Types Of BLDC Motor

5. In Runner Out Runner

6. TORQUE COMPARISON

7. Speed Comparison Speed of out runner Speed of in runner
Iron core stator and permanent magnet rotor
Usually, out runners have more poles, so they spin much slower than their 
Rotational inertia is high
Requre high maintence
Slient
Speed of in runner
No magnatic iron core in stator
No Interlocking between stator and rotor
Rotor spin freely
Low inertia so it can spin with more acceleration
 In runners tend to spin exceptionally fast, often as high as RPM per volt
Need less maintenance
Speed Accuracy is high.
Quickly change the direction.
Noisy

8. TORQUE In Runner As In runners tend to spin exceptionally fast. So,
the ironless motor has very low torque but also higher KV as compare to Out runner.
As in runners lack torque. As a result, most in runners are used in conjunction with a gearbox in models to reduce speed and increase torque.
Out Runner
Since the speed is Inversaly related with speed
 they spin much slower than their in runner while producing far more torque

9. Power to weight ratio
Power-to-weight ratio is a measurement of actual performance of any engine or power source.
Power to weight ratio = power
weight

10. Comparison Of Efficiency Cupper Loss: I^2Rw Iron losses: Vio Efficiency: Power Out / Power In Efficiency: VI-(Cu+Iron loss)/VI
Out Runner
Low Efficiency
In Runner
High Efficiency

11. Comparison In runner Out runner Weight of in runner is less
Power is high
Power to weight ratio is high
Out runner
Weight of out runner is high
Power is less
Power to weight ratio is high

12. constants Some constants are: Motor Constant- Km Velocity Constant-Kv
Torque Constant-Kt

13. Velocity Constant
The Kv rating of a brushless motor is the ratio of the motor's unloaded RPM to the peak (not RMS) voltage on the wires connected to the coils.
For example, an unloaded motor of Kv, 5,700 rpm/V, supplied with 11.1 V, will run at a nominal 63,270 rpm (5,700 rpm/V × 11.1 V)
The Kv Of In-runner is greater than the Kv of Out-runner.

14. APPLICATIONS .

15. APPLICATIONS INRUNNER OUTRUNNER Magneto-Hydrodynamic Drive
Medical Analyzer
Heat and Ventilation Systems
Aero-Modeling
Radio Controlled Cars
Feed Drive in CNC Machines
Extruder Drive Motors
Sleep Apnea Treatment

16. DIFFERENCE OUT-RUNNER IN-RUNNER Low RPM's, high torque
Less efficient than inrunners
No gearbox required
Narrow prop selection
Silent 
High RPM's, low torque
More efficient than outrunners 
 Require a gearbox
Wide prop selection
Noisy

17. In-Runner Applications

18. Magneto-Hydrodynamic Drive
The coils are mounted in a fixed position around a tube and the magnets are mounted on the impeller in the tube. Water is sucked in via the forward intake and pushed out the rear to propel the
craft.  . .
An In-runner style brushless motor is the basis for a Magneto- Hydrodynamic drive on a Submarine

19. MEDICAL ANALYZER
Medical analyzers are multi-function machines used to test human bodily fluids such as blood and urine. In a medical analyzer, fluid samples are transported from station to station to conduct various tests. Generally, medical analyzers are totally enclosed and the temperature within the machine will rise to well above ambient temperature during periods of peak operation. Medical analyzers are designed to test thousands of samples per year and to run a minimal of eight hours per day. Brushless DC motors are ideal for medical analyzers because they combine the characteristics of high speed operation, high heat transfer efficiency, and they have long life expectancies

20. HEATING AND VENTILATION
There is a trend in the refrigeration  industries to use brushless motors. Many fans are now run using a brushless motor. Some fans use brushless motors also in order to increase overall system efficiency.
In addition to the brushless motor's higher efficiency, in HVAC systems (especially those featuring variable-speed and/or load modulation) use brushless motors because the built-in microprocessor allows for programmability, control over airflow, and serial communication. Some ceiling fan and portable fans are also featuring this motor. They advertise the motor being highly energy efficient and quieter than most fans.

21. Out-Runner Applications

22. SERVO MOTORS
Brushless DC motors are widely used as servomotors for machine tool servo drives. Servomotors are used for mechanical displacement, positioning or precision motion control. In the past DC stepper motors were used as servomotors; however, since they are operated with open loop control, they typically exhibit torque pulsations. Brushless dc motors are more suitable as servomotors since their precise motion is based upon a closed loop control systemthat provides tightly controlled and stable operation.
POSITIONING and ACTUATION SYSTEMS
Brushless motors are used in industrial positioning and actuation applications. For assembly robots, brushless motors are used to position a part for assembly or a tool for a manufacturing process, such as welding or painting. Brushless motors can also be used to drive linear actuators.

23. AERMODELING
Brushless motors are a popular motor choice for model aircraft . Their favorable power-to-weight ratios and large range of available sizes, from under 5 gram to large motors rated at well into the kilowatt output range, have revolutionized the market for electric-powered model flight, displacing virtually all brushed electric motors. They have also encouraged a growth of simple, lightweight electric model aircraft, rather than the previous internal combustion engines powering larger and heavier models. The large power-to-weight ratio of modern batteries and brushless motors allows models to ascend vertically, rather than climb gradually. The low noise and lack of mass compared to small internal combustion engines is another reason for their popularity

24. RADIO CONTROLLED CARS
Their popularity has also risen in the Radio Controlled Cars area. Brushless motors have been legal in North American RC car racing since 2006.These motors provide a great amount of power to RC racers and, if paired with appropriate gearing and high-discharge Li-Po (lithium polymer)  batteries, these cars can achieve speeds over 100 miles per hour (160 km/h).
Brushless motors are capable of producing more torque and have a faster peak rotational speed compared to nitro- or gasoline-powered engines. Nitro Engines climax to peak at around 46,800 RPM and 2.95HP, while a smaller brushless motor has instantaneous maximum torque at start, and, when tapering off, can reach 50,000 RPM and 5HP. Larger brushless RC motors can reach upwards of 14 hp and 28,000 RPM to power 1/5th scale models

25. EXTRUDER DRIVE MOTORS
The function of the extruder drive & motor is to provide energy to turn the screw that compresses the polymer.  DC drives are the most popular extruder drive due to their low cost and versatility. Since variations in screw speed can change the dimensions of the final extruded product, a precision motion control system is required to ensure product quality. Brushless DC drives have been frequently used in extruder drives because they offer full torque over the entire speed range with short-term speed errors as low as 0%. 
FEED DRIVES FOR CNC MACHINE TOOLS
There are two drives used in CNC machine tools: spindle and feed drives. Spindle drives provide the motion and power for drilling, milling or grinding operation while feed drives function as axis drive motors and essentially replace the “manual hand wheel controls used in conventional machine tools.” While spindle drives use large DC shunt or AC squirrel cage induction motors, feed drives, on the other hand, typically use DC servomotors with an electronic controller. Brushless DC servomotors are used for their good heat dissipation, reduced rotor inertia and the advantage of maintenance free operation. 

26. SLEEP APNEA TREATMENT
The treatment of sleep apnea requires the use of Positive Airway Pressure (PAP) respirators. Most PAP respirators use a brushless DC motor to drive the blower fan. The blower fan creates positive airway pressure to aid the patient in breathing while they are asleep. In this application, the blower fan will increase or decrease the patient's airway pressure in response to their breathing pattern. When the patient inhales, the blower fan must increase the volume of air into the lungs, therefore the motor must accelerate. When the patient exhales, the blower fan must reduce the volume of air entering the lungs, therefore the motor must decelerate. Sensor-less brushless DC drives are ideal for blower fans used in sleep apnea equipment because the motor is never required to operate below the minimum threshold speed of the drive. In addition, brushless types of DC electric motors are ideal for this type of application because there is no risk of a sudden change in load.
Motors used in hospital equipment or other patient-care facilities are required to comply with low noise level standards to endorse patient comfort and reduce anxiety. Nevertheless, electric motors used in sleep apnea equipment operate at high speeds and are expected to comply with even lower noise level standards. Brushless DC motors are ideal for noise sensitive environments because they do not have brushes, which emit audible noise during rotation

27. Thanks!
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