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Servo motor driving system

A drive system and servo motor technology, applied in the control system, AC motor control, control of multiple AC motors, etc., can solve the problems of low control precision, large driver size, interference, etc., achieve large wiring area, and reduce the overall size , the effect of less wiring distance

Pending Publication Date: 2021-09-28
SHANGHAI LYNAC NUMERICAL CONTROL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a servo motor drive system in order to overcome the defect that the AC servo drive system in the prior art either has interference, resulting in low control accuracy or a large driver size.

Method used

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Embodiment Construction

[0028] The present invention is further illustrated below by means of examples, but the present invention is not limited to the scope of the examples.

[0029] In the related art, the principle of the AC servo driver is to modulate the power devices used by three-phase SPWM inverters. Generally, IGBT tubes are used as the power devices, and AC power is used for powering them. see figure 1 , the AC servo driver 13 is connected with the three-phase AC power supply 11, and the voltage (AC 380V or AC 220V) output by the three-phase AC power supply 11 supplies power for the AC servo driver 13, so that the AC servo driver 13 is under the control of the upper computer controller 12 The drive motor 14 moves. Since the AC servo drive is powered by high-voltage AC, it will introduce strong and complex interference, and even affect the normal operation of the upper computer controller in severe cases. And because of the use of high-voltage AC power supply, it is required to have a larg...

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Abstract

The invention discloses a servo motor driving system. The servo motor driving system comprises a low-voltage direct-current power supply, a controller, at least one driver and at least one motor; the low-voltage direct-current power supply and the controller are connected with at least one driver, and each driver is connected with at least one motor; the low-voltage direct-current power supply is used for supplying power to at least one driver; the controller is used for controlling at least one driver to drive at least one motor. In the invention, as the low-voltage direct-current power supply is adopted to supply power to the driver, mutual interference of various devices in the system due to an alternating current is avoided, and the wiring distance between internal devices of the driver can be very small, so a large wiring area is saved, and the overall size of the driver can be greatly reduced.

Description

technical field [0001] The invention relates to the field of servo motor control, in particular to a servo motor drive system. Background technique [0002] At present, the principle of AC servo drive is to use three-phase SPWM (sinusoidal pulse width modulation) inverter to modulate the power device used. Generally, IGBT (transistor) is used as the power device, and AC power is used for its power supply, that is, the input voltage is AC 380V Or AC 220V. Due to the use of high-voltage AC to power the AC servo drive, strong and complex interference will be introduced. In severe cases, it will even affect the normal operation of the upper computer controller and reduce the control accuracy. And because of the use of high-voltage AC power supply, it is required to have a large safety isolation space between each device in the AC servo drive. For example, the wiring distance between two IGBT tubes must be greater than 3mm, resulting in the overall size of the AC servo drive. l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P5/74H02P27/06
CPCH02P5/74H02P27/06
Inventor 袁再松
Owner SHANGHAI LYNAC NUMERICAL CONTROL TECH CO LTD
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