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 drive circuit, one end of the drive circuit being electrically connected to a DC brush motor;
- a detecting circuit that includes a node connectable to each of another end of the drive circuit, one end of a power supply circuit, and to one end of a smoothing circuit, and that detects changes in a current flowing between the node and the smoothing circuit;
- and
- 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,
- the drive circuit driving the DC brush motor according to the generated 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 drive circuit, one end of the drive circuit being electrically connected to the DC brush motor;
- a detecting circuit that includes a node connectable to each of another end of the drive circuit, one end of a power supply circuit, and one end of a smoothing circuit, and that detects changes in a current flowing between the node and the smoothing circuit;
- and
- 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,
- the drive circuit driving the DC brush motor according to the generated control signal.
A control method comprising:
- detecting, by a detecting circuit that includes a node connectable to each of one end of a drive circuit of a DC brush motor, one end of a power supply circuit, and one end of a smoothing circuit, changes in a current flowing between the node and the smoothing circuit;
- generating a control signal to control rotation speed of the DC brush motor according to the detected changes in the current;
- and
- driving by the drive circuit the DC brush motor according to the control signal.
Dependencies are inferred from the claim text.