Driving apparatus
AssigneeSeiko Epson Corporation
InventorHideo Taki
Life of this patent
Estimating the term…
Abstract
To rotate a transport motor and to stop a carriage motor at an ADF reading angle, a control unit outputs a first and a second signal to a first and a second D/A converter, and a power on/off signal to an A-phase driver circuit for the carriage motor. The D/A converters convert the signal to a first and a second voltage. A transport motor driver supplies power to the transport motor on the basis of the first voltage, and a carriage motor driver turns on and off power supply to the A-phase on the basis of the first voltage and the power on/off signal, and supplies power to a B-phase on the basis of the second voltage.
Claims7
A driving apparatus comprising:
- a single-phase motor;
- a two-phase motor;
- a first signal converter that converts a first input signal into a voltage and outputs the voltage;
- a second signal converter that converts a second input signal into a voltage and outputs the voltage;
- a single-phase motor driver that supplies power to the single-phase motor on the basis of a first converted voltage outputted from the first signal converter so as to drive the single-phase motor;
- a two-phase motor driver that drives the two-phase motor by supplying power to a first phase on the basis of the first converted voltage and a second power on/off signal indicating whether power is to be supplied to the first phase of the two-phase motor and by supplying power to a second phase of the two-phase motor on the basis of a second converted voltage outputted from the second signal converter;
- and
- a signal output unit that outputs, to rotate the single-phase motor and to stop the two-phase motor while supplying power thereto, a first signal that causes the single-phase motor driver to supply power to the single-phase motor, to the first signal converter;
- the second power on/off signal to the two-phase motor driver so as to cause the two-phase motor driver to supply to the first phase a first phase target current to be supplied thereto for stopping the two-phase motor;
- and a second signal that causes the two-phase motor driver to supply to the second phase a second phase target current to be supplied thereto for stopping the two-phase motor, to the second signal converter.
A driving apparatus comprising:
- a single-phase motor;
- a two-phase motor;
- a first signal converter that converts a first input signal into a voltage and outputs the voltage;
- a second signal converter that converts a second input signal into a voltage and outputs the voltage;
- a single-phase motor driver that supplies power to the single-phase motor on the basis of a first converted voltage outputted from the first signal converter so as to drive the single-phase motor;
- a first phase driver that drives the second phase of the two-phase motor by supplying power to the second phase of the two-phase motor on the basis of a second converted voltage from the second signal converter;
- and
- a second phase driver that drives the first phase of the two-phase motor by supplying power to the first phase of the two-phase motor on the basis of a first converted voltage from the first signal converter,
- wherein a current supplied from the first phase driver to the first phase is controlled by a power on/off signal indicating whether power is to be supplied to the first phase, and the two-phase motor is stopped by the current supplied from the first phase driver to the first phase and a current supplied from the second phase driver to the second phase.
Dependencies are inferred from the claim text.