| 摘要 |
PURPOSE: To reduce the cost of a power source circuit for an intelligent power module by improving the reliability of an intelligent power module controlling power source. CONSTITUTION: In a power source circuit which applies a power supply voltage for control across the control circuits 10-13 of intelligent power modules 2-5 respectively incorporating switching elements 6-9 and the control circuits 10-13 for controlling the drive of the elements 6-9, current limiting and voltage divider resistors 33-36 and power supply voltage establishing Zener diodes 37-40 are respectively provided in the preceding stages of the circuits 10-13 and the power supply voltage from a DC voltage source 1 is applied across the circuits 10-13 through the resistors 33-36 and diodes 37-40. |
