Multiplexing control device for motors

Abstract

This provides technology for applying a multiplexing control device to motor control. [Solution] The multiplexing control device 210 includes three controllers C1 to C3 that output digital voltage signals including voltage command values ​​for a two-phase Cartesian coordinate (fixed coordinate) system (α, β) for the motor 300, and a signal control unit 211 that receives the digital voltage signals output from at least two of the three controllers C1 to C3, selects the digital voltage signal output by a non-faulty controller C among the controllers that output the input digital voltage signal based on a predetermined priority order, and generates and outputs a PWM signal based on the selected digital voltage signal.

Claims

1. Three controllers that output digital voltage signals including voltage command values ​​in a two-phase Cartesian coordinate system for the motor, A signal control unit receives the digital voltage signals output from at least two of the three controllers, selects the digital voltage signal output by a non-faulty controller among those controllers that output the input digital voltage signal based on a predetermined priority order, and outputs a PWM signal based on the selected digital voltage signal. A multiplexing control device equipped with the following features.

2. Each controller, A first status monitoring unit outputs a first status signal indicating whether or not one of the other controllers is faulty, based on a comparison of the voltage command values ​​of each of the two phases generated by its own controller with the voltage command values ​​of each of the two phases of one of the other controllers. A second status monitoring unit outputs a second status signal indicating whether or not the other controller is faulty, based on a comparison between the voltage command values ​​of each of the two phases generated by its own controller and the voltage command values ​​of each of the other two phases of the other controller. Includes, The multiplexing control device according to claim 1, wherein the signal control unit selects the digital voltage signal output by the non-faulty controller based on the first status signal and the second status signal output from each controller.

3. The three controllers mentioned above are the first controller, the second controller, and the third controller. The signal control unit receives the digital voltage signals from the first controller and the second controller, The signal control unit, A fault determination unit that determines whether the first controller is faulty based on the first status signal output from the second controller and the third controller, and determines whether the second controller is faulty based on the second status signal output from the first controller and the third controller, A selection unit that selects and outputs the voltage command value in the digital voltage signal output by the non-faulty controller among the first and second controllers, The inverse Clarke conversion unit outputs three-phase digital voltage signals for U-phase, V-phase, and W-phase by performing an inverse Clarke conversion on the voltage command value output from the selection unit. A PWM output unit outputs the PWM signal based on the three-phase digital voltage signal output from the inverse Clarke transformer, The multiplexing control device according to claim 2, including the above.

4. The selection unit selects and outputs a value of 0 as the voltage command value if both the first controller and the second controller are malfunctioning. The multiplexing control device according to claim 3.

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