Admin Table of Contents
- 1 What is stray losses in motor?
- 2 What is stray loss and constant loss?
- 3 Which losses are called stray losses?
- 4 How are stray losses calculated?
- 5 What is stray current in transformer?
- 6 How do you find stray losses in a DC machine?
- 7 What are stray losses and how are they calculated?
- 8 What is a stray loss in a DC machine?
What is stray losses in motor?
Stray loss refers generally to any induction machine loss not accounted for by the standard calculations of primary copper loss, secondary copper (or slip) loss, core loss measured at no load, or friction and windage.
What is stray loss and constant loss?
Notice that, as Stray Load loss depends upon the load current therefore it is categorized under variable loss while Mechanical Loss (independent of load current) comes under constant loss. No load Iron Loss is constant and therefore it is under Constant Loss.
What are stray losses in transformers?
The stray losses in transformer metallic parts are caused by magnetic leakage flux generated basically by the current passing through the windings but also by the high-current loops outside the windings.
What is stray loss in generator?
generators, it is customary to calculate the stray load losses from short-circuit tests by subtracting the known losses, such as friction and windage, field copper, and d-c. armature copper loss, from the measured losses. The remainder is taken as the stray load loss.
Which losses are called stray losses?
Stray losses are also called iron losses. Refer the photo of core assembly figure 6. Leakage field present in the transformer induce eddy currents in conductors, tanks, channels, bolts etc and these eddy currents give rise to stray losses.
How are stray losses calculated?
Formulas in spreadsheet
- HV Full load current = VA / (1.732 · Volt)
- LV Full load current = VA / (1.732 · Volt)
- HV Side I2R losses = I²R · 1.5.
- LV Side I²R losses = I²R · 0.5 · 3.
- Total I² R lossses at Amb.
- Total Stray losses at Amb.
- I²R lossses at 75° C temp = ((225 + 75) · losses) / (225 + Amb.
Which together are called stray losses?
How do you calculate stray loss?
What is stray current in transformer?
A second loss component is caused by circulating currents flowing back and forth between the strands. This circulating-current loss depends upon the relative physical location of the strands throughout the winding.
How do you find stray losses in a DC machine?
According to this standard, the stray load losses 1n d.c. machinery are defined as the sum of the following par- tial losses: (1) Additional core loss due to the flux from arma- ture windings excited by load current (2) Eddy currents in the armature windings (3) Short circuit loss of commutation.
What losses are sometimes called stray losses?
Is 2026 a standard?
This standard gives detailed requirements for transformers for use under the following conditions: Further limitations, with regard to cooling are given for; 1) oil-immersed transformers in IS 2026 (Part 2); and 2) dry-type transformers in IS 11171.
What are stray losses and how are they calculated?
The stray losses are the component of the total load loss and they are produced by electromagnetic flux in the windings, tank, core, core clamping plates, magnetic shields, etc. They are determined by subtracting the ohmic I2R component from the measured load loss. The stray losses in metallic parts are caused by magnetic…
What is a stray loss in a DC machine?
Sum of iron losses and mechanical losses losses in a DC machine are called stray losses. Originally Answered: What is a stray loss in a DC machine? The friction losses &mechanical losses {iron) losses ,the copper losses called as the straylosses SUNOSI™ (solriamfetol) treatment as seen on TV. Ask your doctor if SUNOSI® may be right for you.
What is stray loss in a transformer?
However, any leakage flux that intercepts nearby conductive materials such as the transformer’s support structure will give rise to eddy currents and be converted to heat. There are also radiative losses due to the oscillating magnetic field but these are usually small.this type losses usually known as stray loss in transformer.
What is the difference between iron loss and stray loss?
In case of transformer there is no rotating part so there is no windage loss or frictional loss. As hysteresis loss and eddy current loss take place in the iron core of transformer, bth losses the termed together as iron loss. Stray losses are additional eddy losses in the structural parts and within the winding.