Contents
- 1 What are the analogies between the electrical and mechanical elements?
- 2 What is the relation between reactive power and power factor?
- 3 What is mechanical and electrical system?
- 4 How do you explain reactive power?
- 5 What do you mean by 1 ohm?
- 6 What are some analogies to explain reactive power?
- 7 Can a capacitor be a mechanical mechanical analog?
What are the analogies between the electrical and mechanical elements?
Key Concept: Analogous Quantities
| Electrical Quantity | Mechanical Analog I (Force-Current) | Mechanical Analog II (Force Voltage) |
|---|---|---|
| Voltage, e | Velocity, v | Force, f |
| Current, i | Force, f | Velocity, v |
| Resistance, R | Lubricity, 1/B (Inverse friction) | Friction, B |
| Capacitance, C | Mass, M | Compliance, 1/K (Inverse spring constant) |
What is the relation between reactive power and power factor?
Reactive power (kVAr) is the vector difference between real power (kW), and the total power consumed, which is called apparent power and is measured in kVA. Power factor is a ratio of the real power that is used to do work and the apparent power that is supplied to the circuit.
What is meant by electrical analogy?
Mechanical–electrical analogies are the representation of mechanical systems as electrical networks. At first, such analogies were used in reverse to help explain electrical phenomena in familiar mechanical terms. A given system being represented by an electrical analogy may conceivably have no electrical parts at all.
What is the use of Ohm?
The SI derived unit used to measure the electrical resistance of a material or an electrical device. One ohm is equal to the resistance of a conductor through which a current of one ampere flows when a potential difference of one volt is applied to it.
What is mechanical and electrical system?
‘M&E’ in construction refers to mechanical and electrical systems. Mechanical systems can include elements of infrastructure, plant and machinery, tool and components, heating and ventilation and so on. Building control systems. Energy distribution.
How do you explain reactive power?
Reactive Power is when the Current flow, caused by AC Voltage applied across a device, results in the Current flow being either ahead or behind the applied AC Voltage. Reactive devices will store some Energy as Voltage is applied, and they will return that Energy later in the sine-wave…
What happens when reactive power increases?
When reactive power supply lower voltage, as voltage drops current must increase to maintain power supplied, causing system to consume more reactive power and the voltage drops further . If the current increase too much, transmission lines go off line, overloading other lines and potentially causing cascading failures.
What are the analogies for electrical parameters voltage?
Force Voltage Analogy This circuit consists of a resistor, an inductor and a capacitor. All these electrical elements are connected in a series. The input voltage applied to this circuit is V volts and the current flowing through the circuit is i Amps. Substitute, i=dqdt in Equation 2.
What do you mean by 1 ohm?
One ohm is equal to the resistance of a conductor through which a current of one ampere flows when a potential difference of one volt is applied to it.
What are some analogies to explain reactive power?
Minute LecturesAnalogies to explain reactive power (part 2)IV. The water tower (2/7) The climbing ladder = the electricity line The number of men on the ladder = the voltage The amount of water each man carries = the current The amount of water added to the tank per time interval = the frequency 12.
Are there any analogs between electrical and mechanical systems?
An analogous electrical and mechanical system will have differential equations of the same form. There are two analogs that are used to go between electrical and mechanical systems. The analogous quantities are given below.
How is Capacitance measured in a mechanical analogy?
Since the energy of the mass in a Mechanical 1 analogy is measured relative to mechanical ” ground ” (i.e., velocity=v=0) the energy of the capacitance must be measured relative to electrical ground (i.e., voltage=e=0). To apply this analogy, every node in the electrical circuit becomes a point in the mechanical system.
Can a capacitor be a mechanical mechanical analog?
One deficiency in this analogy is that it only works easily for capacitors that are grounded. This can be seen by the analogies between energy in a capacitor and energy in a mass, and the analogy between electrical ground (unchangeable voltage=0) and mechanical ” ground ” (immoveable position).