Settable current protection circuit based on state of power tube

• Main Authors: LI ZHIGUO, HUANG YUPING, ZHENG ZAIPING, JIANG LITING, LONG HAIFENG, ZHENG JIGUI
• Format: Patent
• Language: Chinese; English
• Published: 22.06.2011
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The utility model belongs to power amplifier circuits, particularly relates to a settable current protection circuit based on the state of a power tube, and aims to provide an electromechanical servo system power device protection circuit with a settable current protection value and high reliability. The settable current protection circuit based on the state of the power tube comprises a driving chip, the power tube and a diode, the DETECT pin of the driving chip is connected to the collector of the driving chip through the diode, the diode conduction direction is from the driving chip to the power tube, and a voltage division circuit is connected between the diode and the power tube and is a plurality of common resistances which are connected in series parallel. The settable current protection circuit based on the state of the power tube provided by the utility model has the advantages that the current protection value is settable. The voltage division circuit is the common resistances which are connected in