1. An electronic device comprising:
an operation unit that is supplied operating power and operates;
a power supply unit that is supplied commercial power from a commercial power supply and supplies the operating power to the operation unit;
an input changeover switch that switches between supplying or not supplying the commercial power from the commercial power supply to the power supply unit; and
a controller that controls the input changeover switch, wherein
the controller includes:
a power input portion that is supplied device power from a master electronic device;
a control signal input portion that receives a control signal from the master electronic device; and
a switching signal output portion that, when the device power is being supplied to the power input portion and the control signal is received by the control signal input portion, outputs to the input changeover switch a commercial power input signal instructing the input changeover switch to switch and supply the commercial power to the power supply unit.
2. The electronic device in accordance with claim 1 wherein
the power input portion includes a power supply changeover switch that switches between supplying the device power to the operation unit as the operating power or supplying the operating power from the power supply unit to the operation unit; and
the controller switches the power supply changeover switch to supply the operating power from the power supply unit to the operation unit, when the commercial power input signal is output to the input changeover switch by the switching signal output portion.
3. The electronic device in accordance with claim 2 wherein
the controller switches the power supply changeover switch to supply the device power to the operation unit as the operating power, when the control signal input portion does not receive the control signal for a prescribed time interval after the commercial power input signal has been output to the input changeover switch by the switching signal output portion.
4. The electronic device in accordance with claim 1 wherein
the controller outputs to the input changeover switch a commercial power disconnect signal instructing the input changeover switch to switch and disconnect the commercial power to the power supply unit, when the control signal input portion does not receive the control signal for a prescribed time interval after the commercial power input signal has been output to the input changeover switch by the switching signal output portion.
5. The electronic device in accordance with claim 4 wherein
the power input portion includes a power supply changeover switch that switches between supplying the device power to the operation unit as the operating power or supplying the operating power from the power supply unit to the operation unit; and
the controller switches the power supply changeover switch to supply the operating power from the power supply unit to the operation unit, when the commercial power input signal is output to the input changeover switch by the switching signal output portion.
6. The electronic device in accordance with claim 5 wherein
the controller switches the power supply changeover switch to supply the device power to the operation unit as the operating power, when the control signal input portion does not receive the control signal for a prescribed time interval after the commercial power input signal has been output to the input changeover switch by the switching signal output portion.
7. The electronic device in accordance with any of claim 1 wherein
the operation unit is a hard disk drive unit, and
the master electronic device is a personal computer.
8. The electronic device in accordance with any of claim 1 wherein
the controller and the master electronic device are connected by a USB (Universal Serial Bus) cable,
the device power is supplied by USB bus power from the master electronic device via the USB cable, and
the control signal includes an SOF (Start of Frame) packet in a header.
9. An electronic device comprising:
an operation unit that is supplied operating power and operates; and
a controller, wherein
the electronic device is electrically connected with a power supply unit that is supplied commercial power from a commercial power supply and configured to switch between being supplied or not being supplied the commercial power from the commercial power supply, wherein
the controller includes:
a power input portion that is supplied device power from a master electronic device;
a control signal input portion that receives a control signal from the master electronic device; and
a switching signal output portion that, when the device power is being supplied to the power input portion and the control signal is received by the control signal input portion, outputs to the power supply unit a commercial power input signal instructing to switch and being supplied the commercial power.
10. A power supply unit electrically connected to a commercial power supply and to an electronic device, wherein
the power supply unit is supplied commercial power from the commercial power supply and supplies operating power to the electronic device, wherein
the power supply unit comprises an input changeover switch that switches between being supplied or not being supplied the commercial power from the commercial power supply according to a signal input from the electronic device.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. In a sheet-fed rotary printing machine having a plurality of printing units, a gearwheel train mechanically interconnecting the printing units and at least two electric drive motors acting on the gearwheel train, a device for controlling the sheet-fed rotary printing machine, the device comprising:
control loops each associated with a respective one of the electric drive motors;
each of said control loops having a respective higher-frequency control element; and
at least one of said control loops having a low-frequency control element supplying an output signal picked up at said control loops and applied to said control loops in a predetermined ratio.
2. The device according to claim 1, wherein said higher-frequency control element is a proportional controller, and said low-frequency control element is an integral controller.
3. The device according to claim 2, which further comprises torque controllers each associated with a respective one of the drive motors, the output signal being a low-frequency output signal of said integral controller allocated to said torque controllers and applied to said torque controllers in said predetermined ratio.
4. The device according to claim 3, wherein said predetermined ratio has a negative sign.
5. The device according to claim 1, which further comprises sensors each associated with a respective one of the drive motors for detecting an actual speed or an actual torque.
6. The device according to claim 2, wherein said proportional controllers have different amplification factors.
7. The device according to claim 1, wherein a predetermined sum torque is allocated as a manipulated variable to the drive motors.
8. The device according to claim 1, which further comprises torque controllers each associated with a respective one of the drive motors, at least one of said torque controllers receiving higher-frequency components multiplied by a negative amplification factor.
9. The device according to claim 8, wherein the amplification factor has a sign dependent on a characteristic form of a vibration of the sheet-fed rotary printing machine at a location of a drive motor.
10. The device according to claim 8, which further comprises an adapted filter receiving a higher-frequency component.
11. The device according to claim 10, wherein said adapted filter is a bandpass filter.
12. A sheet-fed rotary printing machine, comprising:
a plurality of printing units;
a gearwheel train mechanically interconnecting said printing units;
at least two electric drive motors acting on said gearwheel train; and
a device for controlling the sheet-fed rotary printing machine, the device including control loops each associated with a respective one of said electric drive motors, each of said control loops having a respective higher-frequency control element, and at least one of said control loops having a low-frequency control element supplying an output signal picked up at said control loops and applied to said control loops in a predetermined ratio.
13. The sheet-fed rotary printing machine according to claim 12, which further comprises at least one turning device for mechanically coupling a plurality of said printing units to one another.
14. The sheet-fed rotary printing machine according to claim 13, wherein at least one of said drive motors is disposed upstream of said turning device and at least one of said drive motors is disposed downstream of said turning device.