| 摘要 |
PROBLEM TO BE SOLVED: To produce an electric car control device capable of detecting its abnormality very accurately in spite of its simple structure. SOLUTION: When a transmitting means 39 transmits to a communication means 4 a phase angle 23 calculated by a phase calculating means 22M of a main microcomputer 2, the communication means 4 sends to a receiving means 40 of a sub-microcomputer 3 a signal that the incoming signal was received. Then, the sub-microcomputer 3 takes in the phase angle 23 to transmit it to a comparing means 32C. An A/D converting means 41 converts a current detection signal 8 to a digital signal, which is processed by a current converting means 27S to be sent to comparing means 32A, 32B. When a transmitting means 42 takes in a vector control command 30 and a phase angle 29 to send them to the communication means 4, the communication means 4 sends to the main microcomputer a signal that the incoming signal was received. In the main microcomputer, a receiving means 43 receives the signals of the vector control command 30 and phase angle 29 to transmit them to the comparing means 31A, 31B, 31C. The transmitting and receiving operations between the main microcomputer 2 and sub-microcomputer 3 are performed every arbitrary cycle of times. |
