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Safe torque turn-off function circuit and control method

A technology of safe torque off and functional circuit, applied in the direction of motor control, control system, emergency protection circuit device, etc., can solve the problems of affecting efficiency, large loss, power failure, etc., to reduce product volume and reduce circuit loss Effect

Pending Publication Date: 2022-05-13
MIDEA GRP (SHANGHAI) CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current solution connects the switch in series to the busbar of the power device, which causes a large loss during normal operation, and the volume of the high-current switch cannot be ignored
If the power device is turned off by directly cutting off the bus power of the system, it will cause the micro control unit (MCU, Microcontroller Unit) to lose power at the same time
It is very troublesome to re-adjust the zero position of the robot to restart after a power failure. It often takes a long time to restart the machine, especially for high-power inverters or drives, and it often takes a long time to turn on and off the power of these machines. efficiency

Method used

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  • Safe torque turn-off function circuit and control method
  • Safe torque turn-off function circuit and control method
  • Safe torque turn-off function circuit and control method

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Embodiment Construction

[0057] In order to make the purpose, technical solutions and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings. All other embodiments obtained under the premise of creative labor belong to the scope of protection of this application.

[0058] In the following description, the term "first\second\third" is only used to distinguish similar objects, and does not represent a specific ordering of objects. Understandably, "first\second\third" Where permitted, the specific order or sequencing may be interchanged such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein are only for ...

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Abstract

The invention provides a safe torque turn-off function circuit and a control method. The function circuit comprises a first safe torque turn-off STO branch, a control element, a pre-driving element and a power device. Wherein a power supply pin of the pre-driving element is connected with the output end of the control element, and the output end of the pre-driving element is connected with the power device; the control element is used for acquiring the state of the first STO branch; under the condition that the state of the first STO branch is the off state, a first turn-off signal is generated, and the first turn-off signal is used for cutting off a power supply of the pre-driving element so as to turn off the power device. A switch in an existing circuit is replaced by a control element, no series switch is arranged on a bus, in this way, no extra loss is increased, no extra size is occupied, safe torque turn-off is achieved through the control element, the power supply current of the control element is far smaller than that of the switch, the circuit loss is greatly reduced, and the reliability of the circuit is improved. And the size of the control element is smaller than that of the switch, so that the product size is reduced.

Description

technical field [0001] The present application relates to the technical field of automation control, and relates to but not limited to a safe torque off function circuit and control method. Background technique [0002] With the improvement of people's living standards, there are more and more human-machine collaboration scenarios, and the safety of collaborative robots, automated guided vehicles (AGV, Automated Guided Vehicle), mobile robots and other products is very important to people. When the user's personal safety is threatened, the inverter or servo driver is generally powered off by pressing the emergency stop button, so that the motor stops outputting torque and the machine stops running, so as to prevent the accidental movement of the machine from causing harm to the human body. [0003] In order to prevent personal injury accidents caused by product accidents, the Safe Torque Off (STO, Safe Torque Off) function has been designed for drive equipment such as invert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P3/06H02P1/02H02P29/00H02H11/00
CPCH02P3/06H02P1/02H02P29/00H02H11/00
Inventor 王洪林江龙顺
Owner MIDEA GRP (SHANGHAI) CO LTD
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