Inverter control device and inverter control method

An inverter control method for generating a control signal for an object to be controlled based on a plurality of input analog signals, comprising the steps of:

• selecting N analog signals from among M input analog signals;
• AD-converting the selected N analog signals to N digital values;
• and
• generating a control signal for an object to be controlled based on the obtained N digital values, wherein
• L analog signals included in the N analog signals are previously chosen for each of the M analog signals,
• the selecting step outputs each of the M analog signals as any of the analog signals which are previously chosen for each of the M analog signals,
• M is an integer equal to or greater than four,
• N is an integer equal to or greater than three and smaller than M, and
• L is an integer smaller than N.

An inverter control device for generating a control signal for an object to be controlled based on a plurality of input analog signals, comprising:

• a selection section for selecting N analog signals from among M input analog signals;
• N AD converters for converting the N analog signals selected by the selection section to N digital values;
• a control signal generation section for generating a control signal for an object to be controlled based on the N digital values obtained by the N AD converters;
• and
• a selection control section for controlling analog signal selection performed by the selection section, wherein:
• the selection control section changes analog signal selection performed by the selection section in accordance with a timer interrupt which occurs at a predetermined cycle,
• M is an integer equal to or greater than four, and
• N is an integer equal to or greater than three and smaller than M.

An inverter control device for generating a control signal for an object to be controlled based on a plurality of input analog signals, comprising:

• a selection section for selecting N analog signals from among M input analog signals;
• N AD converters for converting the N analog signals selected by the selection section to N digital values;
• a control signal generation section for generating a control signal for an object to be controlled based on the N digital values obtained by the N AD converters;
• and
• a selection control section for controlling analog signal selection performed by the selection section, wherein:
• the selection control section compares a digital value obtained by at least one AD converter of the N AD converters with a previously determined threshold value, and changes analog signal selection performed by the selection section based on the comparison results,
• M is an integer equal to or greater than four, and
• N is an integer equal to or greater than three and smaller than M.

An inverter control device for generating a control signal for an object to be controlled based on a plurality of input analog signals, comprising:

• a selection section for selecting N analog signals from among M input analog signals;
• N AD converters for converting the N analog signals selected by the selection section to N digital values;
• a control signal generation section for generating a control signal for an object to be controlled based on the N digital values obtained by the N AD converters;
• and
• a selection control section for controlling analog signal selection performed by the selection section, wherein
• the M analog signals include at least two phase currents and at least one phase voltage,
• the selection control section switches analog signal selection performed by the selection section between a first mode in which two phase currents are output to different AD converters and a second mode in which one phase current and one phase voltage are output to different AD converters,
• M is an integer equal to or greater than four, and
• N is an integer equal to or greater than three and smaller than M.

An inverter control device for generating a control signal for an object to be controlled based on a plurality of input analog signals, comprising:

• a selection section for selecting N analog signals from among M input analog signals;
• N AD converters for converting the N analog signals selected by the selection section to N digital values;
• and
• a control signal generation section for generating a control signal for an object to be controlled based on the N digital values obtained by the N AD converters, wherein
• performance of at least one AD converter of the N AD converters is lower than performance of other AD converters,
• the M analog signals include a load current,
• the selection control section switches analog signal selection performed by the selection section between a first mode in which the load current is output to a relatively high-performance AD converter and a signal other than the load current is output to a relatively low-performance AD converter, and a second mode in which a part of the signals other than the load current is output to the relatively high-performance AD converter and another part of the signals other than the load current is output to the relatively low-performance AD converter,
• M is an integer equal to or greater than four, and
• N is an integer equal to or greater than three and smaller than M.

An inverter control device for generating a control signal for an object to be controlled based on a plurality of input analog signals, comprising:

• a selection section for selecting N analog signals from among M input analog signals and for outputting each of the M analog signals as any of the N analog signals;
• N AD converters for converting the N analog signals selected by the selection section to N digital values;
• wherein
• N is an integer equal to or greater than three and smaller than M, and M is an integer equal to or greater than four.

An inverter control device for generating a control signal for an object to be controlled based on a plurality of input analog signals, comprising:

• a selection section for selecting N analog signals from among M input analog signals;
• and
• N AD converters for converting the N analog signals selected by the selection section to N digital values, wherein
• the selection section outputs each of the M analog signals as an input of a first AD converter of N AD converters in a first mode and as an input of a second AD converter of the N AD converters in a second mode;
• and
• N is an integer equal to or greater than three and smaller than M, and M is an integer equal to or greater than four.