Questions tagged [ac-motor]
For questions about electric motors driven by alternating current (AC).
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Why does my food mixer have voltage across input cable leads even when unplugged?
I have a technical problem where the cable of a food mixer has voltage across its cable when unplugged. When I measure it with a multimeter at various times after being unplugged it shows a voltage ...
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Coil winding direction in a shaded-pole motor (4-pole)
I have rewound a shaded-pole motor (4-pole).
It's wound around the stator in a clockwise motion and around each coil in a counter clockwise motion.
Is the winding being incorrect the reason why the ...
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Did I wire this AC motor properly?
I disassembled a drill to replace the chuck and when putting it back together it seems to be short-circuiting. I have doubled check the cables but they seem to be ok, so I'm afraid I may have wired it ...
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Pump motor fails to start when connected to a low frequency inverter via a long wire [closed]
I've been struggling with a submersible pump showing unreliable behaviour when connected through a long cable to a low frequency inverter.
The pump is used only once a week to fill up 3 5000 L tanks. ...
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Controller for a automotive BLDC triphasic motor that takes into account Velocity, Acceleration and jerk
Problem
Im in the autonomous driving department for formula student and due to the current pipeline the very last message that outputs from it is a message that contains Velocity, Acceleration and ...
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How does this single phase induction motor run without capacitor?
The motor of the picture has no facility to connect capacitor. The phase and neutral is directly connected to winding. It works fine on 220 volt 50 Hz AC. Although performance get poor at 190 volts.
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What type of single-phase motors can I control using a frequency inverter?
I have a single phase fan, and I want to control the speed of this fan so it occurred to me to design a VFD for this purpose, but I was researching more about single phase AC motors and I read that ...
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Help with (very) odd single phase motor wiring
I think this is my first post here.
I have little knowledge on AC motors, and this machine I am servicing (an old Balltrap/Clay target shooting machine) left me baffled. The below diagram is a ...
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How to find the secondary inductance of the Motor if Ld, Lq, flux linkage, frequency, speed, rotor, and voltage details are known?
Precisely, the question. Is there any formula for this?
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Electrical diagram for a single phase switch, two way switch and ESTOP
I have a need to do an electrical diagram with the following components:
Single phase motor (GGM the motor is 110V, single phase, 60Hz K91P60FU-T5.) It has five leads according to the data sheet.
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Do modern variable frequency drives perform power factor correction?
Do modern variable frequency drives (VFDs) perform power factor correction?
I can't find info to see whether VFDs do power factor correction. If they do, how good are they?
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AC motor speed control circuit
I connected a circuit found on the internet:
Results:
When the AC motor is connected to the closed circuit, it did turn on, but the speed of the motor keeps increasing on its own without turning off, ...
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Wish to understand an AC motor electrical diagram schematic to safely connect a capacitor and switch
I have this motor (Samsung Electronics SMV-260UA) diagram and a 10 μF capacitor from a salvaged microwave:
I've experimented with supplying power, but I need start up current to kick the motor into ...
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How to control the speed of an AC motor with DC voltage programmatically?
What I want to achieve
To control the speed of an AC motor with DC voltage programmatically with Raspberry Pi.
I asked on Raspberry Pi.SE and was told it was an EE question, so I'm asking here.
...
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How can I properly convert two phase AC supply to three phase using capacitors?
I have an AC 3 phase delta connected submersible induction motor with specifications 440 V, 10.5 A, 5 HP, 2800 RPM which is already fitted with a 3 phase PF correcting capacitor in parallel. The ...
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Speed controlling of AC motor with dimmer
I have a fan which has asynchronous motor. It's features are that 230V AC, 50 Hz, 50W. I want to control it's speed using AC dimmer. I can control the brightness of light bulb with my dimmer circuit. ...
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Why do BLDC motors require feedback, whereas AC motors do not?
I was delving into the functional difference between 3-phase AC motors and 3-phase BLDC motors, and was wondering what would happen if a BLDC motor was run without feedback to its controller.
I found ...
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How to estimate part-load properties of asynchronous AC induction motors?
In the question Is Power consumed by a motor under various load conditions constant? the user Li-aung Yip https://electronics.stackexchange.com/users/28570/li-aung-yip presented this diagram for the ...
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Can we run an induction motor by sequentially applying DC voltage to the windings of stator?
We know that in induction motors, 3-phase AC input is applied to 3 windings of stator in order to generate changing magnetic flux in the rotor. What would happen if we apply 3 DC voltages ...
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Does current have to return to its source?
I am not the most knowledgeable when it comes to electricity, so apologies if my questions lacks necessary information that is needed to get a good answer.
I work with 3 phase electric motors, and I ...
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How to solve application with power spike one time per 24 hour
We have a building where many similar systems run heaters and valves off a 400VAC, 3 phase, 63 ampere supply (45 kW maximum.)
Internal control software in each system turn the heaters and valves on ...
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How to connect Arduino to AC motor
I want to connect from Arduino Uno to AC 1.5 kW single phase motor for my cement mixer project. I was want to try to create a switch on off by using code in Arduino and I was thinking to add several ...
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What happens if you connect an AC generator to an AC motor? [closed]
An AC generator (or alternator) converts mechanical energy into electrical energy. An AC motor does the reverse.
What would happen if we connect the two in such a way that the output rotational ...
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Mystery small, electric motor: shaft held stationary while motor spins around it
I want to wire this motor to a 3-pin plug. The colors are not standard. Which of these wires is neutral, active and earth.
It would be of interest to know what this kind of motor is called?
I was ...
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Is it OK to reduce fan speed by reducing voltage?
I have this air cooler whose speed is just too much even on the lowest speed setting, so I added one more speed controller(or regulator) in series which is basically used to control the ceiling fan ...
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Trying to understand this electrical diagram schematic on an AC motor that I have, particularly symbol between yellow and black wires
I'm new to electrical wiring and I'm trying to learn a bit and came across this AC motor which I have that isn't hooked up. I have attached the motor wiring diagram:
This is also the wiring ...
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Why AC motor driver shorts out?
I have been working in a VFD using an AC motor driver FSBB30CH60DF and making control of it using a dspic30f4011. As you can see in the attached circuit schematic, the mains supply is a single phase ...
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Oversized electrical motor, synchronous, vs asynchronous
I know that a oversized motor would consume more energy than a well sized one, and in a low load scenario it will present a lower power factor than a well-sized one too. My question is, what is the ...
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Can this blown component be identified?
I was repurposing a universal motor from a blender for a home project. Unfortunately a screw went through a wire and shorted to ground. Many components are damaged. I'm assuming the motor is fine. The ...
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Doubts regarding relays
I post this question asking for advice. I am working on a personal project for my garden and I want to automatize a water supply system, more specifically a 1/2 HP water pump and a motor. Both work ...
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How to prevent an electrical motor surge from repeatedly blowing the fuse when it stalls?
So, this is something that I shouldn't need to do, but I do. As far as I understand, it should be trivial, bit I'm hazy on the details.
I have a 2kW mains AC power tool with a rotary output. Its ...
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Single phase 3-speed AC motor won't start spinning or spins in wrong direction
I have a Danby DPAC8399 air conditioner, and its fan motor started acting strangely. Sometimes, it it will only do a hum and won't start, and other times it will do that hum for a few seconds and then ...
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Are there any 20v to 240v step up transformers in the market? [closed]
I'm constructing a AC motor driver for a project that will take in a DC voltage source and output an AC voltage fit for an AC-motor. I didn't have prior experience with power electronics or power ...
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Induction Motor Wire Size
Capacitor Run Single Phase Induction Motor have very high starting currents, possibly in the order of 35-40 Amps upon startup for a 1 hp device, whereas the nominal current usually lies in the order ...
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SPIM Rated Torque
What determines the rated torque of an induction motor? Is it purely limited to max continuous current adherent to heat dissipation requirements, or is there more to it? From what I understand, motors ...
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How to combine wall outlets for higher amperage?
I have a large single phase AC motor that draws 30 amps at 125v. I only have access to NEMA 5-15R outlets (which are rated for 15 amps). However, several outlets are on different lines (different ...
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AC Synchronous motor control circuit
What is the best way to drive AC synchronous motor?
I have AC motor like this:
If I connect mains to 0 and 1 terminal it drives CW, if to 2 and 0 - CCW. In my project I have MCU that will drive motor,...
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control ac motor with SCR
I want to repair the circuit of a Mixer that used the TS820 thyristor.
The other components were healthy except the thyristor so I replaced the TS820 with the BT151 but the circuit did not work.
Now I ...
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Valve motor seems to stall to open. Does this make sense?
This is the scenario: There's a valve controlled by what it looks to be an AC motor, specified as 220V 50Hz and 7W. That's all, there's no datasheet available and there's nothing else on the labels ...
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Reconnecting a rewound 110vac motor to power
Motor is (about) 5hp 110vac and powers a a table saw.
Motor was recently rewound but previous owner did not reconnect to the power cord.
There are no info plates on the motor to help w/ reconnecting.
...
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What is the net magnetic flux density in the center of a four-pole stator and other multiple-pole stator?
According to this ppt,
if the currents are given as
$$\left\{
\begin{aligned}
i_{aa'}=I_M\sin{(\omega t)} \\
i_{bb'}=I_M\sin{(\omega t-120°)} \\
i_{cc'}=I_M\sin{(\omega t-240°)} \\
\end{aligned}
\...
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Which type of motor use in oil-free air compressor? And how to detect stall?
I got 220V AC single-phase air compressor which labeled "Oil-free" and it look like this.
Some time the motor fail to start and got smoke out. (Some people says that happen when start motor ...
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Need help designing a hairdryer
I'm designing a hairdryer as project for a university class, but I'm having trouble regarding the choice of the motor. I need it to have two possible speeds. My first idea was to use an AC motor and a ...
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Why can't I change the speed of an ininduction motor by changing the voltage?
Given a three-phase asynchronous AC motor ("induction motor"), I tried figuring out whether lowering speed / torque by lowering the supply voltage should work, similarly to how it works with ...
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Effect of PWM output from Variable Frequency Drive to PSC motor
I looked at VFD diagram and seem like it use Sine-PWM Output without any filter to drive psc single phase ac motor
Inductance and capacitance seem to work with pure sine wave but PWM output have a lot ...
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Space vector and bias voltage
I am trying to learn the space vector modulation but I am wondering how is the bias voltage in a 3-phase system regarded by the space vector?
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Multimeter and clamp give different AC current measurement
I am trying to measure the power output of an AC permanent magnet motor to a load (a resistor). To do this, I am measuring the current through the resistor, and the voltage across the resistor. To ...
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Working of an electric motor [closed]
Do motors run on an Ac source? If it does then do we need to convert ac into dc before supplying it to the motor?
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How to increase the power of an electric motor?
What's the difference between a 1HP and 2HP electric motor?
Slightly different dimensions:
They look almost identical:
Here are the specs:
Same top speed (RPM). Same Voltage. Difference in current ...
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How to wire a single phase, 3 wire motor?
So i bought a motor off of kijiji, it was an old furnace motor. I am trying to build a flat lapidary machine and use this motor to power it. However, there is no wiring diagram on the motor anywhere ...