| 摘要 |
PROBLEM TO BE SOLVED: To simplify required computation by reducing the capacity of a storage part. SOLUTION: A required ramp table is selected from the storage part, and data is read from a read address in the storage part and written into a register (S1, S2), when the read address at this time is the one which stores the data equivalent to a motor speed maximum value, the read address is added to form data at acceleration (NO in S3, S4), and control data of exciting current at acceleration is formed by repeating processes from a step S1 on. At deceleration (YES in S3), on the other hand, the read address is subtracted (S5), and the data of the read address after subtraction is read and written into the register (S6, S7). When the read address at that time is the one which stores the data equivalent to motor speed '0' (NO in S8), the control data of exciting current at deceleration is formed by repeating the processes from step S5 on. |
