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AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorsToshimitsu AIZAWA, Takeshi SHIBAYAMA, Tetsuro IWAMURA, Makoto SHINOHARA
Estimating the term…
An embodiment provides a motor drive device including: a power conversion circuit having a configuration in which a plurality of arms including a series circuit of positive and negative semiconductor switching elements are connected in parallel to each other and configured to drive a motor; a controller configured to generate and output on/off signals for each of the semiconductor switching elements constituting the power conversion circuit by PWM control; a current detection unit configured to detect a current flowing through the power conversion circuit; a current limit unit configured to stop an operation of the controller when the current reaches a threshold; and a position estimation unit configured to estimate a rotational position of the motor using a motor current and a motor voltage, the position estimation unit being configured to correct the motor voltage used for estimation of the rotational position in a carrier cycle of the PWM control in which the operation of the controller is stopped.
A motor drive device comprising:
A motor driving method performing, when a motor is driven by a power conversion circuit having a configuration in which a plurality of arms including a series circuit of positive and negative semiconductor switching elements are connected in parallel to each other, processes of:
Dependencies are inferred from the claim text.