| 摘要 |
PURPOSE: To enable quick control with a simple circuit and solve a thermal problem of power elements, by processing a motor by digital signal processing using a microcomputer. CONSTITUTION: A stepped pedal state is converted to a resistance, which is applied to a microcomputer 8 with a pedal input part 4. This signal is converted to an analog signal with a D/A conversion part 9 and supplied to a pulse width modulation part 10. By an output step signal of the pulse width modulation part 10, a gate output part 11 forms a logic signal and supplies it to a motor driving part 16, which operates a motor part 15. In the motor driving part 16, FET driving parts provided with many power elements are connected in parallel. Circuits and arrangement of the FET driving parts are effectively constituted on a mounting part of heat dissipating structure. That is, by controlling the motor by digital signal processing using the microcomputer, quick control with a simple circuit is enabled, a thermal problem of power elements is solved, and failure and malfunction of equipment can be prevented. |
