Questions tagged [generator]

A generator is a device that generates electricity from mechanical energy via different energy sources such as heat or kinetic energy of water.

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How safe would it be to build your own 15 kW, 3-phase generator?

I need to get a petrol/diesel generator for my house with a power rating above 15 kW. It should be a 3-phase generator. The prices of such generators are extremely high. I have a working 2000 CC car ...
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What components should I use for a bicycle generator?

I know next to nothing about electronics, ergo any help is gratefully received. I'm trying to build the bicycle generator in this Instructables guide, but there is no specification. I have so far ...
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How to simulate external load on a generator in Ansys maxwell?

How to simulate external load on a permanent magnet synchronous generator in Ansys Maxwell? How do I test the generator with resistive and inductive load and get results such as power factor and ...
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Why does an induction generator operate at leading power factor?

The power factor of a single-phase induction motor is usually lagging whereas the power factor of an induction generator is leading. From my understanding an induction motor needs reactive power to ...
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Rotary inverter to transmit stable and high-quality power for power system with high penetration of renewable energy [closed]

From your point of view, do you think the highlighted information above is true? I think it's true and would like to do a research where I will replace electronic inverters with a motor generator set ...
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1 answer
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High-reliability transformer selection [closed]

Our company has an emergency diesel generator as backup in case of electrical failure. This generator is powered by batteries to start up the genset. In order to charge those batteries, we need a ...
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Analysis of a motor/generator set for the replacement of diesel engines

I would like to supply a 12 VDC, 3500 RPM permanent-magnet motor with a 24 V battery using a 12 V voltage regulator. The motor will be coupled to a 220 V, 1.2 kW, 50 Hz, 1450 RPM generator. The power ...
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2 answers
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If a VFD-driven induction motor can be operated as a generator, what will be the voltage and frequency of the generated voltage?

It is known that when an induction generator is connected to the grid, the frequency and voltage of the electricity generated will be that of the grid but when the VFD is connected inbetween grid and ...
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1 answer
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Function of 30 Ω resistor wired in parallel across the field coils of a vintage 12 V generator

What function is served by the 30 Ω resistor wired in parallel to field coils (qty. 4 with a total resistance value of 5.8 Ω) in a vintage 12 V generator? The 30 Ω resistor is in the form of insulated ...
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2 answers
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AC vs DC voltage regulator for hybrid drone

I am working on building a hybrid power source for a drone. I have a 7 HP, 2-stroke, 2 kg engine tied to a 7000 W permanent-magnet motor (1.8 kg, not sure a truck alternator could be close to that), ...
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3 answers
84 views

How do I distribute an energy load over a battery and generator?

In a motor efficiency test, I use a motor, a generator, and a battery (Not an over-unity or perpetual machine attempt). I connect the motor's shaft with the generator and use the battery to initially ...
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modelling and simulation of a motor generator set for the replacement of diesel engines

Can a motor-generator set with specifications and outputs as shown in the picture below be used to power a 16 kW, 220V house?
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Is the overvoltage protection used in this circuit a normal way of doing it?

The circuit is from a clip on YouTube. VCC is from a stepper motor generator and varies between ~0-30 volts DC. From what I understand, and please correct me if I am wrong, when the voltage gets too ...
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Why does this split-phase generator allow more current for line-to-neutral voltage than for line-to-line voltage?

I understand thoroughly the power equations for balanced sinusoidal three-phase circuits. I haven't studied split-phase systems that much, but I think I understand how the power equations would be. I ...
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Electrical theory regarding load sharing

I am having issues understanding why raising frequency of one AC generator while in parallel with another causes it to pick up more load. Any help would be appreciated. I operate with turbine powered ...
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Triangle wave generator won't oscillate - breadboard build

I am to trying breadboard a square and triangle generator similar to this one. While there were a couple of differences (such as a potentiometer) in my original schematic, this simplified one still ...
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How to calculate the power of an asynchronous generator?

Let's have an asynchronous motor spinning unloaded, and another coupled to the main shaft currently not driven. The motor will reach a speed which is below the synchronous speed (slip). If we force ...
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1 answer
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Making a DIY wind generator for kid's project. How can we improve it?

My boy wants to make a wind generator and we have a 3D printer. We have decided to go with an axial flux style 140mm diameter with 12 iron free coils (4 per phase) so it can turn easily. Without gears,...
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If I use a DC motor as a generator, would the output current be AC or DC [duplicate]

I am thinking of using a DC motor as a generator for a toy, but I am unsure if I need to do a full wave rectification if the output current is AC.
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Hard disk motor as a generator - controlling torque/rotation speed

I'm a mechanical engineer, currently working on a project concerning wind turbines: I want to use an hard disk spindle motor (4 pins) as my generator. Since I want to do wake experiments, I'd like to ...
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Choosing capacitor voltage rating for a Marx generator

A Marx generator charges capacitors in parallel then discharges them in series. I read that the voltage across each capacitor accumulates when they are connected in series, which causes subsequent ...
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What happens on a DC-DC grid connection after a perturbation in the synchronous grid?

Consider the Continental Europe synchronous grid. This power system has some DC-DC connections with other countries (for example one with Great-Britain). Suppose now there is a sudden big outage ...
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A question regarding Reactive power

Why does the production of reactive power not require extra fuel unlike active/real power?
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Synchronous generator

While calculating this professor first said 200MVA and 25KVA are 1pu because they are rated values. Then he easily find the E filed by Efiled = Vterminal + Armature Current*total impedance(synchronous ...
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1 answer
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Do static generators maintain a constant voltage at the terminals?

Do static generators maintain the terminal voltage constant like a synchronous generator does? If not, are they at constant current? With static generator I mean photovoltaic systems connected to the ...
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1 answer
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How to get stable current from three-phase alternating? [closed]

I have this generator. How can I convert a three-phase AC voltage into a DC voltage? I know that I can use a diode bridge to rectify the voltage, but how can I use it with a three-phase generator?
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Connecting 2 layer PCB coils together

I'd like to make a single phase generator with permanent magnets and coils in order to generate electricity just with my hand. I already made a disc with 8 holes to put neodymium magnets in it and a ...
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How to get a static generator starting from a synchronous one?

I want to model a static generator (a photovoltaic one) inside a simulation tool. This simulation tool has no static generator (it is quite new and not user friendly). My idea was to model a ...
1 vote
1 answer
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Is the reference voltage for voltage control the RMS between the three phase voltages?

Suppose to provide voltage control with an AVR connected to a synchronous generator. A voltage reference is compared with the output terminal voltage of the generator, and the error between them is ...
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Electrical torque and electrical power of a generator?

Having the electrical torque and the angular speed of a synchronous generator, can I calculate its electrical power output as the product between the electrical torque and its angular speed w (Pe=Tew) ...
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PWM solid state relay output not well modulated with inductive load

I am attempting to control the current through a generator rotor by adjusting PWM input to a DC to DC solid state relay (SSR), specifically a TWTADE SSR-40DD. The power supply for the output side of ...
1 vote
3 answers
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How can the energy produced by a generator be fed back to the motor that rotates the generator?

The drawing below shows an induction motor (IM), powered from the grid through a variable frequency drive (VFD). This IM, through a gearbox, rotates a permanent magnet synchronous machine (PMSM) ...
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2 answers
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Does the diameter of a coil affect the voltage it generates when a magnetic field passes it?

If two wires of equal length (let's say 1m) are wound with different diameters (3cm and 6cm) to form a coil, if equal alternating magnetic fields passes through both of them, will they generate the ...
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Does a Marx generator work good with low frequency?

If it rectifies AC to DC it still has ripple frequency. For a Marx generator, should that ripple frequency be high or will it still work with low frequency? On, YouTube the flyback transformers ...
2 votes
1 answer
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What is the loading factor of a generator?

Looking at an ENTSOE paper, I have seen this table in which the typical ''loading factors'' of different generation types are listed (see figure below). But, what is this???? I was supposing that it ...
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Transformer ratio of a transformer that connects a generator to a MV grid?

Inside my one-line diagram in which I am studying some properties of the medium voltage grid, I want to connect a generator to the MV busbar to study the hosting capacity. Therefore there is not a ...
2 votes
1 answer
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Converting 1-5Hz from linear generator into 60Hz

My senior design project is a linear wind generator that's modeled after the Wind Vortex Project. I've been looking for a way to internally increase the frequency of my generation subsystem from my ...
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Power factor of a synchronous based DER

I am working on a project including a synchronous based DER (2 Gens).I have a few question, I'll appreciate if you could help me. 1- I want to see what would be the typical control-mode setting of the ...
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How can I set the peak voltage in an AC waveform?

I am trying to make a small generator, nothing fancy just a coil of wire, and I was curious as to how the peak voltage of the waveform could be changed. Is the only way to increase this voltage with a ...
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3 answers
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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 ...
1 vote
1 answer
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Does a grid-connected induction generator create phase difference between the grid voltage and generated current?

I saw an answer to another question that stated: "An ordinary induction generator connected to a power grid will draw lagging reactive volt-amperes from the grid and supply real power to the grid....
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DC motor as a generator [closed]

I was wondering if I could use a simple DC motor to power a small LED and how fast I would need to spin it to do so. I am making a small air-powered engine in school and I kind of want to connect it ...
1 vote
0 answers
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How does the electrical power from the output of a generator vary after a fault?

I know that after a sudden generation/load variation there is an imbalance between mechanical power and electrical power at the borders of generators which causes a frequency change according to the ...
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Mechanic and electric power after imbalance in power system?

After a power imbalance (for example a generator disconnection) in the electric grid, generation and consumption are not equal. This causes a dynamic transient in generators described by the Swing ...
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Electric Turbine Generator using Fan Motor

I need to build a turbine with permanent magnets using a table fan motor, I've come across many tutorials but none of them describes well all the physics on it, it would be appreciated if anyone has ...
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Calculate power output of 3 phase generator - uneven sine wave

I am using this BLDC motor [https://uav-en.tmotor.com/html/2018/navigato_0402/52.html] as a generator. The device providing the mechanical drive turns the motor about half a turn and not at a linear ...
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How are primary reserves activated for frequency control?

How are primary reserves activated for primary frequency control? In particular I have the following doubts: Is there a frequency threshold where each of them are automatically activated or they are ...
2 votes
1 answer
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Frequency reading 180 Hz on only one line to line measurement in three-phase backup 60 Hz LP gas powered generator in idle mode

I am running into an issue I don't understand why is happening. I have found how to "fix" it, but I am interested in ideas on what the actual source of the issue is Short version: I have a ...
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what is the surplus-control of generation?

Reading the ''P1 – Policy 1: Load-Frequency Control and Performance'' document, published by UCTE in 2009 (it is available on internet for all) I noted that there are many contributions to Load-...
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Diesel generator ground and protection devices

I have a question about protection in a portable power system. I am working on a project that is a moving truck with a generator on it. We should use the generator to feed some customers when the ...

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