| 摘要 |
PURPOSE: A motor control device is provided to include a power monitor function capable of monitoring electric power consumption by using the existing detector, installed to control a 120-degree applying electric power discovery converter, without using many parameters and installing a specific detector for the calculation of electric power. CONSTITUTION: A motor control device includes: a converter unit(20) connected to a multi-phase power supply and an inverter unit(30) connected to a motor, wherein the converter unit and the inverter unit cooperates with each other so as to control backtracking and recovering of a motor; a phase detecting circuit(35) detecting the phase of multi-AC(Alternating Current) voltage of a multi-phase power supply; a selecting circuit(50) selecting the DC(Direct Current) of the specific phase from the detected phase and converting the selected DC into AC; a leveling circuit(60) calculating a leveling DC by leveling the converted DC by the selective circuit; a coefficient multiplication circuit(110) multiplying a coefficient by the leveling DC calculated from the leveling circuit; a power calculation circuit(120) calculating an electric power by multiplying the leveling DC, multiplied by a coefficient in the coefficient multiplication circuit, by the DC voltage of converter unit load; and an accumulation power circuit(140) calculating an accumulation power by integrating the electric power, calculated by the power calculation circuit, with time. The phase detecting circuit, the selecting circuit, and the leveling circuit are the existing circuit installed to control backtracking and recovering of the motor. [Reference numerals] (110) Coefficient multiplication circuit; (130) Filter circuit; (140) Accumulation power circuit; (35) Phase detecting circuit; (40) Current selection signal generation circuit; (50) Selecting circuit; (55) Edge detection circuit; (60) Leveling circuit; (65) Polarity determination circuit; (70) Stop signal generation circuit; (75) Power voltage wave height detection circuit; (80) Recovery start detection circuit; (85) Gate signal generation circuit; (AA) Average DC current; (BB) DC voltage; (CC) Average power; (DD) Power usage monitor
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