verkefni 5 - Ace-coder101/vesm1_2 GitHub Wiki

#Motorar og hreyfingar

##Spurning 5.1 #1.Hvernig er stýrimótor (e. servo motor) ólíkur hefðbundnum DC mótor?

##svarið DC motors spins freely when powered by a DC current and also have no precise positioning but most servo motors have limited rotation and are capable of being directed to move to a really precise position.

#2.Hvernig er hægt að stjórna í hvora áttina DC mótor snýst án kóða?

svarið

##Spurning 5.2 #1.Settu upp og keyrðu sweep kóðann á brauðbretti Sweep leiðbeiningar ##svarið https://drive.google.com/file/d/1V_oLYNgoiDH1b25RD0xg_H1dlqxc-RTH/view?usp=sharing #2.Settu upp og keyrðu Knob kóðann á brauðbretti Controlling Servo with a Potentiometer ##svarið https://youtu.be/BEkJnqbvRDE

##Spurning 5.3 #1.Hver er munurinn á rafhlöðu og rafþétti?

##svarið The difference between a battery and a capacitor is that in a battery power is generated through a chemical reaction, and in a capacitor a charge is stored and maintained in an electrical field.

#2.Hver er munurinn á Nonpolarized (NPD) og polarized (PD) þéttum?

##svarið A polarized capacitor has a positive lead which needs to be connected to power, and a negative lead which needs to get connected to ground but a nonpolarized capacitors can be connected any which way.

#3.Afhverju er heppilegt að nota rafþéttir með mótor?

##svarið To ensure that the motor is operating at its highest efficiency, always use the dedicated capacitor that is included with the motor. The dedicated capacitor creates a 90 electrical phase shift from the auxillary(capacitor)phase to the main phase.

##Spurning 5.4 #1.Fylgdu Arduino Built-in Stepper Library og settu upp á Breadboard ##svarið https://youtu.be/mdeESHs98wg ##Spurning 5.5 #1.Hvað er átt við með free current í rafmótorum? ##svarið Free current is the current drawn when the motor is rotating freely at maximum speed, under no load other than friction and back-emf forces in the motor itself.

#2.Hvað er átt við með stall current í rafmótorum? ##svarið Stall current is the maximum current drawn, when the motor is applying its maximum torque, either because it is being prevented from moving entirely or because it can no longer accelerate given the load it is under.

##Spurning 5.6

  • Á hvaða spennusviði vinnur hann?
  • Hver er hámarkssnúningshraði RPM (m.v. 6V)?
  • Hver er lausagangs straumur (free run current) við 6V?
  • Hver er hámarksstraumur (stall current) við 6V?
  • Hver er þvermál öxuls? ##svarið
  • Operation Voltage of 3 - 12 V
  • 6 V free-run speed of 11,500 RPM
  • 70 mA
  • 2 mm

##Spurning 5.7

  • Útskýrðu hugtakið snúningsvægi (torque). ##svarið
  • Torque is a force directed in a circle(rotating and object). Torque is a spinning force. If torque is spinning an object, the object will create a linear force at its edge. In the instance of a wheel spinning on the ground, the torque applied to the wheel axle creates a linear force at the edge of the tire where it contacts the ground. This is how one defines torque, a linear force at the edge of a circle. Torque is described by the magnitude of the force multiplied by the distance it is from the center of rotation (Force x Distance = Torque). Torque is measured in units of force*distance, such as Inch-Pounds of Newton-Meters.

##Spurning 5.8

  • Armur er 0,5m og neðan á honum er 0,1kg lóð, hvaða snúningsvægi verkar á hann? ##svarið
  • Torque(T)=Force(F)Distance(m) m=0.5 , F=MassAcceleration , Mass=0.1kg T=F0.5 ; F=0.1kg9,8m/s2 F=0.98N Therefore, T=0,98N0.5m T=0.49Nm ##Spurning 5.9 #1.Hve þungu lóði lyftir þetta talíukerfi? ##svarið Afl=5kg 5kg4=20kg

##Spurning 5.10 #1.Hvert er snúningsvægi út ef snúningsvægi mótors er 1Nm ? ##svarið Torque=1Nm Compound Gear Reduction = Reduction 1 x Reduction 2 = (60 / 12) x (60 / 12) = (5) x (5) = 25 therefore,the output shaft is 25 times slower than the input shaft with 25 times as much torque. output torque=input torquegear reduction Output torque=1Nm25 Output torque=25Nm

#2. Hver er snúningshraði út ef snúningshraði mótors er 1000 RPM ? ##svarið gear reduction=Reduction 1 * Reduction 2=(60 / 12) x (60 / 12) = (5) x (5) = 25 Output speed=input speed/gear reduction Output speed=1000RPM/25=40RPM

##Spurning 5.11

  • Útskýrðu hvað þetta línurit sýnir okkur

##svarið As seen in the graphs above, current and torque load are proportional. More torque load means more current draw, but current and rotational speed are inverse. The faster the motor spins, the less current it draws.