Closed control device for dc brush motor, control system, and control method
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorHideki Kimura
Life of this patent
Estimating the term…
Abstract
According to one embodiment, there is provided a control device including a detecting circuit, a control circuit and a drive circuit. The detecting circuit detects changes in a current flowing between a node and a smoothing circuit, the node being to which a DC brush motor, a power supply circuit and the smoothing circuit can be electrically connected via respective different lines. The control circuit generates a control signal to control rotation speed of the DC brush motor according to the detected changes in the current. The drive circuit drives the DC brush motor according to the control signal.
Claims20
A control device comprising:
- a detecting circuit that detects changes in a current flowing between a node and a smoothing circuit, the node being to which a DC brush motor, a power supply circuit and the smoothing circuit can be electrically connected via respective different lines;
- a control circuit that generates a control signal to control rotation speed of the DC brush motor according to the detected changes in the current;
- and
- a drive circuit that drives the DC brush motor according to the control signal.
A control system comprising:
- a power supply circuit;
- a smoothing circuit;
- and
- a control device placed between the power supply circuit and a DC brush motor and between the smoothing circuit and the DC brush motor,
- wherein the control device includes:
- a detecting circuit that detects changes in a current flowing between a node and a smoothing circuit, the node being to which the DC brush motor, the power supply circuit and the smoothing circuit can be electrically connected via respective different lines;
- a control circuit that generates a control signal to control rotation speed of the DC brush motor according to the detected changes in the current;
- and
- a drive circuit that drives the DC brush motor according to the control signal.
A control method comprising:
- detecting changes in a current flowing between a node and a smoothing circuit, the node being to which a DC brush motor, a power supply circuit and the smoothing circuit can be electrically connected via respective different lines;
- generating a control signal to control rotation speed of the DC brush motor according to the detected changes in the current;
- and
- driving the DC brush motor according to the control signal.
Dependencies are inferred from the claim text.