Electric pump
AssigneesAisin Corporation, Toyota Jidosha Kabushiki Kaisha
InventorsTakeru Yamamoto, Ryota Obana, Tomoya Ishii, Motoki Takeno
Life of this patent
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Abstract
An electric pump includes a pump unit, a motor and a controller. The pump unit is configured to pump fluid by a rotating operation. The motor is a brushless direct-current motor and configured to rotationally drive the pump unit. The controller is configured to control a current to be supplied to the motor. The controller is configured to switch between voltage control for controlling the current to be supplied to the motor based on a target voltage and current control for controlling the current to be supplied to the motor based on a target current.
Claims4
An electric pump comprising:
- a pump unit configured to pump fluid by a rotating operation;
- a brushless direct-current motor configured to rotationally drive the pump unit;
- and
- a controller configured to control a current to be supplied to the motor, the controller being configured to switch between voltage control for controlling the current to be supplied to the motor based on a target voltage and current control for controlling the current to be supplied to the motor based on a target current, wherein
- the controller is configured to, based on a rotation speed of the motor per unit time, select, as an operation mode, one of a restriction possible mode for performing control by switching between the voltage control and the current control and a non-restriction mode for performing only the voltage control.
Dependencies are inferred from the claim text.