Motor control device
A control device and motor technology, which is applied in the direction of AC motor control, control system, and control of multiple AC motors, and can solve the problems of not being able to replace the forward conversion part, etc.
Inactive Publication Date: 2012-10-17
FANUC LTD
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Problems solved by technology
However, the forward conversion unit of this new standard does not correspond to the numerical control unit used so far, so there is a forward conversion unit that cannot be replaced by this new standard, and the forward conversion unit of the same standard (that is, the old standard) has to be used. device problem
[0012] In addition, as in Japanese Patent Application Laid-Open No. 2001-238490 and Japanese Patent Laid-Open No. 2002-291274, it is also considered to allow direct communication between the forward conversion unit and the numerical control unit, but in this case it is necessary to add a new communication function. LSI or cable with large communication capacity
Method used
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[0022] A motor control device having a communication unit will be described below with reference to the drawings. However, it should be understood that the present invention is not limited to the drawings or the embodiments described below.
[0023] figure 1 It is a block diagram (No. 1) of the motor control device according to the embodiment of the present invention. In the motor control device in the servo system, a motor that directly drives the feed axis of the machine tool and the number of control axes of the spindle is installed. In the illustrated example, the number of control axes of the machine tool (that is, the number of motors) is two, but this is only an example.
[0024] The motor control device 1 according to the embodiment of the present invention has: a numerical control unit 11 for issuing instructions related to the driving of the motors 51-1 and 51-2; The inverse conversion units 13-1 and 13-2 convert the DC power output from the forward conversion un...
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The invention provides a motor control device (1). The motor control device (1) comprises a numeric control part (11) sending instructions related to the drive of motors (51, 51-1, 51-2); a positive conversion part (12) for converting alternating currents into direct currents; and a reverse conversion part (13, 13-1, 13-2) for converting direct currents output by the position conversion part (12) into alternating currents for driving the motors (51, 51-1, 51-2) according to the instructions from the numeric control part (11). The reverse conversion part comprises a first communication unit (21) communicated with the numeric control part (11) and the positive conversion part (12). The positive conversion part comprises a second communication unit (22) communicated with the reverse conversion part (13, 13-1, 13-2). The motor control device further comprises a positive conversion control part (23) for controlling the motion of the positive conversion part (12) by complying with the motion of the positive conversion part (12) based on the information forwarded from the numeric control part (11) through the first communication unit (21) and the second communication unit (22).
Description
technical field [0001] The present invention relates to a motor control device that converts alternating current into direct current and then converts alternating current into alternating current to control a motor that uses it as driving power. Background technique [0002] In the servo system of a machine tool, there are servo motors (hereinafter referred to as "motors") for each feed axis and spindle of the machine tool, and these motors are driven by a numerical control device. The servo system consists of a motor that directly drives the feed axis of the machine tool and the number of control axes of the spindle, as a motor control device that controls the motor, supplies drive power to the motor, controls the position, speed or torque of the servo amplifier, and directs the servo amplifier. The motor position, speed or torque numerical control unit (CNC) constitutes. A servo amplifier for supplying AC drive power to a servo motor has a forward conversion unit that con...
Claims
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Login to View More IPC IPC(8): H02P5/74
CPCH02P27/06H02P5/74
Inventor 岩下平辅置田肇丹羽正一
Owner FANUC LTD