| 摘要 |
PURPOSE:To accurately control with a simple configuration by independently controlling digital amounts corresponding to a voltage and a frequency from a microcomputer unit and outputting the amounts. CONSTITUTION:A microcomputer unit (MCU)2 outputs a digital amount corresponding to the prescribed frequency to a counter 3, and outputs a digital amount corresponding to voltage information to a D/A converter 4. A ROM6 inputs the counted value of a counter 3 as an address value, and outputs the data of the corresponding address to a base driver 7. This base driver 7 outputs a signal for directly driving the bases of transistors Tr1-Tr6. On the other hand, the output of the converter 4 is applied to chopper control means 8, and a transistor Trc for controlling a DC/DC converter is driven by the output. |
