Dc-dc converter and voltage detector using same
AssigneesKeihin Corporation, Honda Motor Co., Ltd.
InventorsTakayuki Ohta, Masanori Kawamoto, Toshiaki Ariyoshi
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Abstract
A DC-DC converter includes: a transformer including primary and secondary windings; a switching element that drives the primary winding; a comparator that compares a voltage induced in the secondary winding with a predetermined voltage to detect that the voltage is outside a predetermined voltage range; and a controller. The controller stops switching operation of the switching element when the voltage is outside the predetermined voltage range. Preferably, the DC-DC converter is of a flyback system.
Claims7
A DC-DC converter comprising:
- a transformer including primary and secondary windings;
- a switching element that drives the primary winding;
- a comparator that compares a voltage induced in the secondary winding with a predetermined voltage to detect that the voltage is outside a predetermined voltage range;
- and
- a controller that stops switching operation of the switching element when the voltage is outside the predetermined voltage range.
A voltage detecting apparatus comprising:
- a high voltage battery including a plurality of battery cells connected in series, which are grouped into modules each including a predetermined number of the cells;
- a battery voltage detecting unit that detects voltages of the modules and transmits a signal indicating the detected voltages;
- a signal processing unit that is supplied with electric power from a low voltage battery and processes the signal;
- a DC-DC converter that boosts up a voltage of the low voltage battery to apply the boosted voltage to the battery voltage detecting unit, the DC-DC converter further comprising a transformer including a feedback winding generating a voltage proportional to a secondary winding voltage in magnitude;
- a detector comprises a comparator that compares the generated voltage with a threshold voltage to detect an error in the voltage detecting apparatus;
- and
- a controller that stops operation of the DC-DC converter when the detector detects the error.
Dependencies are inferred from the claim text.