A Hysteresis Comparing Voltage Bleeding Circuit

A technology of bleeder circuit and hysteresis comparison, which is applied in the direction of electric motor/converter plug, deceleration device of DC motor, etc., to achieve the effect of reducing the number of pulses

Active Publication Date: 2022-04-26
珞石(北京)科技有限公司
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Problems solved by technology

[0004] It is more feasible to deal with the single-axis version of the drive in this way, but the multi-axis version of the motor system is suitable for centralized management, and the discharge circuit of the multi-driver shared bus system can be processed together with an external circuit, placed between the power supply and the drive, so much It is a question of which part of the driver controls the bleed

Method used

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  • A Hysteresis Comparing Voltage Bleeding Circuit

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Embodiment Construction

[0016] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0017] In conventional discharge processing, the program generally sets two comparison points, Vth1 and Vth2. When the voltage rises, Vth1 takes effect. At this time, the voltage is greater than Vth1, and the discharge will be turned on, and then the voltage will drop. In the stage where Vth1 does not take effect, Vth2 takes effect. At this time, the voltage drops below Vth2 before the discharge is disconnected. This forms a space for hysteresis comparison to prevent the discharge pipe from moving too frequently. The invention r...

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Abstract

The present invention proposes a hysteresis comparison voltage discharge circuit, comprising: the positive pole of the input capacitor is connected to the positive pole input terminal of the power supply, the negative pole of the input capacitor is connected to the negative pole input terminal of the power supply, the positive pole of the diode is connected to the positive pole input terminal of the power supply, The negative terminal of the diode is connected to the positive output terminal, and after the first voltage dividing resistor and the second voltage dividing resistor are connected in series, they are connected between the positive input terminal of the power supply and the negative input terminal of the power supply; the first voltage dividing resistor and the second voltage dividing resistor The midpoint of the connection is connected to the non-inverting input terminal of the comparator, the midpoint of the connection between the third voltage dividing resistor and the fourth voltage dividing resistor is connected to the inverting input terminal of the comparator, and the output terminal of the comparator is connected to one end of the feedback resistor, The other end of the feedback resistor is connected to the non-inverting input end of the comparator; the negative end of the voltage stabilizing diode is connected to one end of the voltage stabilizing resistor, and the positive end of the voltage stabilizing diode is connected to the negative output end.

Description

technical field [0001] The invention relates to the technical field of multi-axis robots, in particular to a voltage discharge circuit for hysteresis comparison. Background technique [0002] In the case of motor drive, the servo drive and the frequency converter will have the situation that the electric energy will be poured back into the drive when the motor decelerates. At this time, the voltage on the bus capacitor will be raised. If no measures are taken, the voltage may exceed the rated voltage of the capacitor. There is a danger of breakdown, and the voltage may exceed the withstand voltage of the power device in the driver and damage the power device. Therefore, in the case of motor drive, the bus voltage discharge circuit is a necessary module. [0003] The discharge circuit of the common single-axis drive is completed inside the drive, usually with the participation of the control system. The software program detects the assigned value of the bus voltage. Once the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P3/12
CPCH02P3/12
Inventor 庹华程珂钱鹏曹华韩峰涛任赜宇姜鼎盛姚路
Owner 珞石(北京)科技有限公司
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