Motor Definition and 1000 Threads

If I have a motor with a full load power factor of 0.8 and starting power factor of 0.3 and I install a VSD to run it with a datasheet power factor of 0.95, will the power factor during starting be 0.3 or 0.95? And at full load? Cheers!

Hello, On the image below is a test pendelum for rock wool production. The pendelum is driven by two induction motors. When the right motor makes one revolution, the left motor makes two revolutions. The motors are positionally locked (example: when the right motor is at 35.3° the left motor is...

Hello all I recently bought a cabbing grinder machine from India and now recognize that the motor(1/2hp 230v~) doesn't have any safety label or certificate whatsoever. I know close to nothing about motors or electricity and ask myself if it is safe to use the machine. To be honest I don't even...

Hello All I've conducted an experiment to work out the efficiency of a small motor, and it comes out to be very low. Have I done my calculations correctly? I connected the motor to a gearbox (made from Meccano) and a winch and used it to lift a weight. I measured the DC voltage across the...

Hi I’m a year 12 student and I’m trying to turn a washing machine motor into a generator. In my physics class we have only learned about AC generators using permanent magnets but the motor I’ve got doesn’t have any magnets and I believe that it is called an induction motor? Anyway I’m still...

I am a mechanical engineer and my experience with electrical systems is almost nil. The concept of a simple DC motor explained here was quite interesting, especially the need of a commutator part: And then I checked this DIY simple DC motor here and was confused because there was no...

Hi all I am Belgian and I have difficulty with english formulas. I'm trying to calculate the power and torque required of a motor to rotate a load. Here is the problem: I have a motor (axis up) on which is fixed a cylindrical load of 15Kg. The diameter of this load is 400mm Calculate the power...

hi everyone, i need to build a dc motor for my school project. I have used copper wire for the turns (60 turns), wood to build the structure of the armature and commutator. i have used neodymium magnets as my permanent magnets and paper clips as the brushes. I tried using a 9v battery with a...

Hi. I have to design a controller circuit for switched reluctance motor. The topology to be used is asymmetric half-bridge. The motor current is 50A at 50V. I need help in the selection of controller. I have both options either to use embedded or totally analog controller.

I have just started my electrician career and I am studying electric motors. why an 120v ac motor can not be 3 phase ? .

Current drawn by motor = ##\frac{120-75}{90}## = 0.5 Amps The answer says the power output of the motor is 37.5 Watts. The only way I can get that answer is if P = IV = 0.5(75) = 37.5. This implies that in an electric motor, the back emf is the voltage of the motor. This confuses me because...

Hello how are you :D I have some problems with my code, which is to control the speed of a DC motor by pwm with the pic16f84A. I already have the combinations and the diagram of the signals, but I still need to implement the part in bold. How would the delays be implemented so that they have...

How come when the load is increased in an electric motor, the torque and current increase but the motor slows? Isn't how fast the motor is how much torque it has?

How did you find PF?: Google Search Hi have a 48 Volt EV motor of which I will be modifying for belter performance I am unsure of the specs i have contacted the supplier and awaiting a call back I have Toyota coaster And I am allowing up to 5000 KG in Weight How many batteries do I need and...

I want to calculate the angle of a wooden boat at rest in salt water, with a 55 lb outboard motor mounted on the transom + 3 gallons of gasoline (18 lbs) + 2 adults weighing about 150 lbs each. So just figure a total weight at the back end of the boat being 55 + 18 + 300 = 373 lbs. The boat...

Hi I am trying to do an artisanal EV car and I would like to know how do I choose the right motor. I already have one in mind but I don't know how to calculate the max mass that it can move. (see attached pdf) Gear Ratio : 2.39 Diff Ratio : 4.88 Wheel Diameter: 26in I would like to know the...

Hi! My team and i have been stuck in this school project for awhile. Been reading up a lot but can't find the answer. We have been designing and rotating platform that is able to rotate a load of 2000kg. So the rotating platform would something similar to those car turntables where there would...

Summary:: I have built a DC motor as a physics project, it has neodymium magnets, copper split ring commutator and insulated copper wire. It connected to a 12v power pack. There is definitely a proper current flowing because it creates sparks and the copper coil becomes hot. When I turned on...

I have tried to solve a problem about the amount of watts a motor needs to recive if i want an elevator of 1250Kg to move at a speed of 2m/s +/- 0,10m/s after 3 seconds. The motor has an efficiency of 0,80. I've tried looking at my teachers uni recording, but it doesn't seem to explain this part...

Would a DC motor that had torque of 0.34 Nm be able to generate enough power to rotate a platter that weighs 6 - 10lbs

$$Vstator_{peak} = 120√2 *√2 = 240 V$$ $$Istator_{peak} = i_{q} (current on q axis)= 20*√2 = 28.2842 A $$ $$ω{15} = Ω_{15} * p = 2π * 15 = 94.2477 rad/s$$ $$ω{15} = Ω_{15} * ψ_{pm}$$ Hence $$ψ_{pm} = e0/ω15 = 168.3V/94.2477 rad/s => ψ_{pm} = 1.79 Wb$$ $$M = 3/2 * p * ψ_{pm} * iq $$ Hence $$ M...

Hello, New here but thanks in advance for help. I need help sizing a motor/gearbox for a machine i am working on. known specs are below: I have a solid shaft driving 4 gears that are all different sizes, the gear with the most weight attached has a pitch diameter of 7.65 in and they are sized...

So I am doing an experiement about DC motors, and I would like to know why the efficiency plot looks like a parabola. What is the structure behind that. Thank you in advance

Given the following input parameters: Parameter Value Rs (Resistance through stator) 1.4 Ω Rr (Resistance through stator) 0.7 Ω Ls (stator inductance) = Lr (rotor inductance) 0.002 H xs = xr = 2*π*f*Ls 0.6283i Ω Lm(magnetic inductance) 0.01 H xm = 2*π*f*Lm 3.1415iΩ f (frequency)...

Hi folks, I'm searching for information/procedure and also calculations/equations on how to correctly wind a stator on a (general or DC 3-phase) brushless motor? I.e. how to wind a copper wire X number of times around the stators, and thus get the desired performance/force that is required...

Here are the details. I started with a nut and bolt, and drilled a hole down the center of it. I inverted and glued into place a carbon fiber rod in the hole. I glued a bit on the end of the bolt. I wrapped magnet wire around the bolt on each side of the rod 400 times. I made a commutator using...

Given the AC Induction (asynchronous motor) in 3 phases: Parameter Value Pn (Nominal Power) = Pmechanical (output power at the shaft) 5 kW = 5000W uls (Voltage through the stator line) 220 V fstator (stator frequency) 50 Hz p (Number of pole pairs) 2 LFe (Iron loss) = Lmechanical...

I am working on an axial flux generator design, I consisits of 2 rotors and one stator, there are 6 pole pairs and 9 coils. Here is my simulation setup The three phase windings are connected in star configuration through Maxwell circuit. I created two bands enclosing each rotor and then united...

I tried A with the solution of 9.73 and 8.69 both wrong.

Hi, I have a 1 HP motor spinning a turntable (just a wheel) weighing 1kg, diameter 25cm speed 2000rpm. (Arbitrary specs). If I have to spin a turntable with the same weight (1kg) but double the diameter (50cm) at the same speed, would I necessarily need a motor with double the power (2 HP)...

I build a Z-axis (not the one displayed on image). The weight of the Buildplatform is 2.29kg and is going to be used on a MSLA printer, so the weight might get increased 1kg additionally, so 3.29kg. The problem is that when detached from the printed model from Fep film there is a resistive...

I've set up an expression for the current in a stepper motor coil. Each current pulse resembles a trapezoid in the time domain. Now I'm trying to figure out how to best use this to model the torque behavior for different RPS. My ide was to integrate over time to get the whole pulse...

I am currently trying to create a linear induction motor for fun and am having some trouble getting it to start oscillating or move at all. I am using this video as a reference... I am using 3D printed PLA as the structure for the copper to wind around, 26 GA Craftware USA copper wire, 5/8"...

I am assuming the motor is cumulative compound wound and that it is long shunt. I also assume that the shunt field resistance ##R_{shunt}## = 50Ω, while the series field resistance is ##R_{series}## = 0.03Ω. i) calculate EMF with armature current ##I_{a}## = 5A and armature resistance ##R_{a}##...

I'm willing to build a motorized gimbal head for my camera (something like this: https://www.amazon.com/dp/B01JN5D40A/?tag=pfamazon01-20). If my understanding is correct, given that camera will be well balanced on the platform, the motors would not need to hold the load and only should be...

The 2hp dual-capacitor motor on my bandsaw can be wired for either 220V (draws up to 10 amps) or 110V (draws up to 20 amps). I need to install a new circuit whichever I decide (30 amp circuit for the 110V configuration). Am I correct in assuming the performance of the motor, such as amount of...

I'm pretty sure the answer is overcharged by intuition. Can someone provide a reason?

Hi guys, I don't have much knowledge of physics sadly, and I want to build a machine that can spin a disk. My question is - How can I know the weight I can spin on a motor? I need to be able to spin around 5-6kg, for 350 RPM, and I'm not sure I'm aiming for the correct motor. I'm thinking of...

I use a 2 Relay Motor module to control Direction on a motor (linear actuator). When Relay A is active, actuator retracts. When Relay B is active, actuator extents and Led Module is activated. After some repetitions Led module fail. Cause of the fail? I believe Surge voltage, although i am not...

I was discussing stepper motors with a friend. We touched upon different aspects. I showed how the coils in the motor have a limit to how fast they can be fully saturated with current, and how this time can be calculated by the aid of Kirchhoff's and Lentz's law. The theoretical speed calculated...

in my worksheet, AB turns in clockwise direction , while in my textbook, it turns in the anti clockwise direction. so may I know why is this the case?

Have farm motor 1 hp 600 mf capacitor failed can one slip old tv style capacitor in old can as this motor runs on 220 ac?

Summary:: I want to design a mechanism consisting in 4 rack driven pinions , like an elevator and i need help in choosing the right motor. Hello!I want to design a mechanism consisting in 4 rack driven pinions , connected to each other via shafts, used for a positioning system , a moving up...

^because in my textbook, the set up doesn't even show the direction of dot/cross at points A/D, so we won't know the direction of current. then how are we supposed to use fleming's left hand rule to determine the direction of force?

Hi all, I have the following situation: I need to determine the minimum force needed for a motor to move the load (75 N) at the end of the beam. I added the forces in a FBD and did the sum of forces and moment calculations (see below). Is this calculation correct and what would be the next...

Homework Statement:: Hi, I'm looking for an exercise involving a linear motor, but on my physics book there are none Relevant Equations:: Lenz Law, Maxwell's equation Hi, everyone I'm looking for an exercise involving a linear motor, but on my physics book there are none. Do you happen to...

Three phase squirrel cage induction motor with given parameters (stator winding connected in delta) nominal power: Pn=22.4kW nominal stator voltage: Vsn=230V nominal stator current: Isn=39.5A nominal stator frequency: fsn=60Hz nominal speed: nn=1168min−1 number of pole pairs: 3 stator...

The question I'm in doubt about is The motor coil has a resistance of 10 Ω and is powered by a voltage of 120 V. When the motor is operating at rated speed, its emf is 70 V. Thus, it is questioned: a) What is the coil current when the motor is started? b) What is the coil current at rated...

I want to check the back emf of motor as shown in the article below My question is does a normal probe will be sufficient or do I need a differential probe to check the back - EMF waveform?