Motor controller
First Claim
1. A motor controller comprising:
- a motor-position detector; and
a motor driver, coupled to said motor-position detector by a power cable having a pair of electric lines, for supplying control-power to said detector via the power cable, wherein said controller transmits information about driving a motor between said detector and said driver via the power cable, wherein said motor-position detector includes;
a power-receiving section;
a power-receiving path for coupling the power cable to the power-receiving section;
a signal-coupling circuit, disposed on said detector side, for AC coupling with the power-receiving path;
a motor-position-detecting circuit for outputting parallel information about motor-position;
an encoding circuit for converting the parallel information about the motor-position into serial information; and
a motor-position-transmitting circuit for outputting the serial information about the motor-position to the signal-coupling circuit, wherein said motor driver includes;
a power-supplying section;
a power-supplying path for coupling the power-supplying section to the power cable;
a signal-coupling circuit, disposed on said driver side, for AC coupling with the power-supplying path;
a motor-position-receiving circuit for receiving serial information about the motor-position from the signal-coupling circuit on said driver side;
a decoding circuit for converting the serial information about the motor-position into parallel information; and
a motor-driving circuit for driving the motor according to the parallel information thus obtained.
1 Assignment
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Accused Products
Abstract
A motor controller includes a motor-position detector, a motor driver and a power cable having a pair of electric lines (two lines) which feeds power from the driver to the detector. The detector superimposes serial information about the motor-position to the power cable via windings of a transformer or a coupling capacitor. The serial information is obtained by converting parallel information about the motor-position. The serial information superimposed travels to the driver via the power cable. The driver receives the serial information via windings of the transformer or a coupling capacitor, and converts it to parallel information. The driver drives the motor according to this parallel information. The information necessary for driving the motor is superimposed to the power cable and transmitted through the power cable, so that a number of electric lines between the detector and the driver can be minimized.
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Citations
38 Claims
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1. A motor controller comprising:
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a motor-position detector; and
a motor driver, coupled to said motor-position detector by a power cable having a pair of electric lines, for supplying control-power to said detector via the power cable, wherein said controller transmits information about driving a motor between said detector and said driver via the power cable, wherein said motor-position detector includes;
a power-receiving section;
a power-receiving path for coupling the power cable to the power-receiving section;
a signal-coupling circuit, disposed on said detector side, for AC coupling with the power-receiving path;
a motor-position-detecting circuit for outputting parallel information about motor-position;
an encoding circuit for converting the parallel information about the motor-position into serial information; and
a motor-position-transmitting circuit for outputting the serial information about the motor-position to the signal-coupling circuit, wherein said motor driver includes;
a power-supplying section;
a power-supplying path for coupling the power-supplying section to the power cable;
a signal-coupling circuit, disposed on said driver side, for AC coupling with the power-supplying path;
a motor-position-receiving circuit for receiving serial information about the motor-position from the signal-coupling circuit on said driver side;
a decoding circuit for converting the serial information about the motor-position into parallel information; and
a motor-driving circuit for driving the motor according to the parallel information thus obtained. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification