| 摘要 |
PURPOSE: To provide the transistor driving floating power supply which is fabricated by an easy manufacturing method and uses a compact insulating transformer. CONSTITUTION: A voltage which is supplied to a primary winding h1 of a main insulating transformer 2 is controlled by a control circuit 1. A power supply V1 outputted from the secondary winding of the insulating transformer 2 is fed back to the control circuit 1. Primary windings h3 -h6 of insulating transformers 21, 31, 41 and 51 are connected in parallel with the secondary winding h2 of the insulating transformer 2. The output voltages of the secondary windings h7 -h10 of the insulating transformers 21, 31, 41 and 51 become power supplies V2-V5. The power supplies V2-V5 of four systems are supplied into the power transistor of the main circuit of the motor driving inverter. The transistor driving floating power supply can be constituted of the circuit suing the insulating transformer having a simple structure in this way. |
