| 摘要 |
PURPOSE: A circuit for sensing an overcurrent of a high pressure generator for air conditioning is provided to sense abnormal phenomena such as overcurrent or output short for control outputs, thereby preventing fire or safety accidents in advance. CONSTITUTION: A circuit for sensing an overcurrent of a high pressure generator for air conditioning includes a first input terminal(I11) applied with an external voltage and having a predetermined winding number(n), a second input terminal(L12) induced with a predetermined voltage by the first input terminal, a first transistor(Q1) to be turned on by an external voltage and an induction voltage of the second input terminal more than a predetermined level, a second transistor(Q2) to be turned on by the voltage induced to the second input terminal, a plurality of resistors(R4,R5) for dividing the voltage induced to the second input terminal to apply to a base of the second transistor, a first capacitor(C1) for charging the induced voltage to the second voltage while the second transistor is turned on, a third transistor(Q3) to be turned on at discharging of the first capacitor for turning off the first capacitor, and an output terminal(L3) for generating a high voltage according to a winding ratio of the first input terminal when the first transistor is turned off.
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