| 摘要 |
An elevator control apparatus solves a problem in that electric power produced in a regenerative mode of an elevator is thermally consumed by a regenerative resistor or the like rather than being effectively used. The elevator control apparatus in accordance with the present invention includes: a converter for rectifying AC power into DC power; an inverter for converting the DC power into AC power of a variable voltage and a variable frequency; a controller for controlling a motor based on the AC power of the variable voltage and the variable frequency so as to operate an elevator; a power storage unit for storing the DC power; a required power computing circuit for computing required power of the elevator based on a speed command of the controller; a charge/discharge control circuit for issuing a drive signal for conducting control by changing charge current, which is to be supplied to the power storage unit, based on regenerative electric power so as to charge the power storage unit with the regenerative electric power if required power of the elevator is negative, that is, if the regenerative electric power is available; and a charge/discharge circuit for charging the power storage unit with the regenerative electric power in accordance with the drive signal. Thus, regenerative electric power can be effectively used, contributing to energy saving.
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