Motor control device and motor control method

A motor control device, comprising:

• an inverter which converts between direct current and alternating current;
• a motor which is connected to an output side of the inverter and is driven by receiving application of an AC voltage;
• a current sensor which detects AC current in the inverter;
• and
• a controller which performs current detection in respect of an output signal from the current sensor at two different sample timings, generates a feedback current value on the basis of a result of the current detection, and controls the inverter in such a manner that the feedback current value matches a current command value,
• wherein the controller includes
• a current detector for which there are previously set a first sample timing and a second sample timing having a shorter detection cycle than the first sample timing, as the two different sample timings, and which sequentially outputs, as the result of the current detection, a first current detection value based on the first sample timing and a second current detection value based on the second sample timing
• a coordinates converter which converts coordinates of the first current detection value detected as three phases to a first d-axis current value and a first q-axis current value, and converts coordinates of the second current detection value detected as three phases to a second d-axis current value and a second q-axis current value, and
• a detection current processor which generates the feedback current value for the d-axis and the q-axis, by using the first d-axis current and the second d-axis current to compute a d-axis feedback current value, and using the first q-axis current and the second q-axis current to compute a q-axis feedback current value.