Patent ID: 6169681
Filing Date: 2001-01-02
Classification: H02M,H03F

Abstract:
A circuit for balancing a power supply having a positive bus with a positive voltage, and a negative bus with a negative voltage, the circuit comprising: a transformer having a primary winding and a first secondary winding; and switching circuitry for alternately connecting the positive bus and the negative bus to the primary winding of the transformer, a primary voltage being generated on the primary winding in response thereto, a secondary voltage opposite in polarity to the primary voltage being generated on the first secondary winding in response to the primary voltage; and recycling circuitry coupled to the first secondary and the positive and negative buses; wherein when the secondary voltage is greater than the positive voltage, power is transferred from the negative bus to the positive bus via the transformer and the recycling circuitry, and when the secondary voltage is less than the negative voltage, power is transferred from the positive bus to the negative bus via the transformer and the recycling circuitry.