Road vehicle discharge lamp supply transformer - has secondary winding stages coupled in series for voltage summation

摘要

The transformer has a core with a centre limb and a pair of parallel outer limbs coupled by yokes. The arrangement can be provided by two E-type cores or two U-cores and an I-core. - The centre limb has an airgap and carries a primary winding (W1) and a secondary winding (W4) that are coaxially wound. Further secondary windings (W2, W3) are formed on the outer limbs. The 3 secondary windings are coupled in series such that the induced voltages are added together in the no load condition.