Motor stalling protection processing system

Abstract

The utility model relates to the technical field of motor stalling protection, and discloses a motor stalling protection processing system, comprising a motor interface used for connecting a motor and a power supply; the PWM adjusting generator is used for generating an adjustable PWM signal and adjusting the duty ratio of the PWM signal; the current sampling unit is used for monitoring the running current of the motor in real time; the processor is used for receiving the data from the current sampling module and judging whether a protection mechanism is triggered or not according to a preset threshold value; the switching device is used for disconnecting the motor and the power supply when the protection mechanism is triggered; and the automatic recovery unit is used for automatically recovering the normal working voltage of the motor when the current value is reduced to be below the safety threshold value, and the intelligent overload protection mechanism not only improves the safety and reliability of equipment, but also greatly simplifies the operation process and improves the user experience.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor locked-rotor protection technical field especially relates to a motor locked-rotor protection processing system. BACKGROUND

[0002] The motor may encounter locked-rotor condition in the operation process, that is, the motor cannot rotate due to mechanical failure, excessive load and other reasons, and long-time locked-rotor will increase the internal temperature of the motor, which may cause problems such as aging of insulation material and burning of winding, affecting the service life and reliability of the motor.

[0003] The traditional overload protection method often adopts the mode of directly cutting off the power supply of the motor to make the motor stop working immediately, so as to achieve the protection purpose, when the system monitors that the motor appears overload condition in the operation, the power supply of the motor will be automatically cut off immediately, so that the motor enters the protection state to prevent further damage, however, once the overload condition is solved, the system will not automatically restore the power supply of the motor, but needs to manually perform a series of operations, such as pressing the reset button or restarting the system, to provide power for the motor again, this recovery process depending on manual intervention not only is inefficient, but also lacks the ability of intelligent processing, therefore, the motor locked-rotor protection processing system is proposed to solve the above problems. SUMMARY

[0004] The utility model discloses a motor locked-rotor protection processing system to solve the shortcomings of the prior art that the recovery process depends on manual intervention and lacks intelligent processing.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme:

[0006] A motor locked-rotor protection processing system, comprising:

[0007] A motor interface for connecting the motor and the power supply;

[0008] A Adjustable generator for generating adjustable Signal, adjust Signal duty cycle;

[0009] A current sampling unit for real-time monitoring of the operating current of the motor;

[0010] A processor for receiving data from the current sampling module and determining whether to trigger the protection mechanism according to the preset threshold value;

[0011] A switching device for disconnecting the connection between the motor and the power supply when the protection mechanism is triggered;

[0012] An automatic recovery unit is used to automatically restore the normal operating voltage of the motor when the current value drops below a safety threshold.

[0013] Preferably, the motor interface includes a relay to control the on and off of the motor power supply. The motor interface is responsible for connecting the motor and the power supply to provide power to the motor. In the event of an overload, the motor interface will disconnect the power supply according to the instructions of the processor to protect the motor and other related components.

[0014] Preferably, the When the regulation generator detects motor overload, it reduces The duty cycle of the signal, the When the regulating generator detects that the current value is lower than the safety threshold, it recovers The duty cycle of the signal, The adjustment generator is used to generate an adjustable signal, by adjusting The duty cycle of the signal is used to control the motor's operating power. The larger the duty cycle of the signal, the higher the average voltage obtained by the motor, and the speed and torque also increase accordingly.

[0015] Preferably, the current sampling unit converts the motor current into an electrical signal and monitors the operating current. The current sampling unit monitors the operating current of the motor in real time and converts the current value into an electrical signal that can be processed by the processor.

[0016] Preferably, the processor includes:

[0017] A comparator that compares the motor current with a preset threshold to determine whether to trigger the protection mechanism;

[0018] A storage unit for recording historical operating data of the motor;

[0019] A communication interface for exchanging data with external devices or control systems;

[0020] The processor receives data from the current sampling unit and determines whether to trigger the protection mechanism based on the preset threshold. If the current exceeds the threshold, the processor will issue an instruction to reduce the current. The duty cycle of the signal reduces the power supply to the motor.

[0021] Preferably, the switch device disconnects the motor from the power supply when the protection mechanism is triggered.

[0022] Preferably, the automatic recovery unit includes a delay circuit for restoring the normal operating voltage of the motor after a delay of a period of time.

[0023] The utility model has the following beneficial effects:

[0024] The utility model discloses a more intelligent overload protection strategy is adopted, and this strategy does not directly cut off the power supply when detecting overload, but adjusts the duty cycle of pulse width modulation signal, intermittently applies small pulse voltage to the motor, this mode can significantly reduce the instantaneous power output of the motor, reduces the damage risk of overload to the motor and system, and avoids the adverse effect that complete power-off can bring simultaneously.

[0025] The utility model discloses a motor current is monitored in real time, and the system can automatically judge whether overload has been removed, and once detecting that the current drops below the safety threshold, the system will automatically restore the normal working voltage of the motor, without manual intervention, thereby realizing seamless switching from the protection state to the normal working state, and this intelligent overload protection mechanism not only improves the safety and reliability of the equipment, but also greatly simplifies the operation process and improves the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The utility model discloses a motor locked-rotor protection processing system's system block diagram is provided. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model. EMBODIMENT

[0028] As shown in the utility model discloses a motor locked-rotor protection processing system, comprising: Figure 1 A motor interface is used for connecting the motor and power supply;

[0029] A

[0030] adjustment generator is used for generating adjustable signal, and adjusting signal duty cycle;

[0031] A current sampling unit is used for monitoring the running current of the motor in real time;

[0032] A processor is used for receiving the data from the current sampling module and judging whether the protection mechanism is triggered according to the preset threshold;

[0033] A switching device is used for disconnecting the connection between the motor and power supply when the protection mechanism is triggered; ​​

[0034] An automatic recovery unit is configured to automatically restore the normal operating voltage of the motor when the current value drops below a safety threshold.

[0035] The motor interface includes a relay that controls the on-off of the motor power supply.

[0036] The regulation generator detects when the motor is overloaded and reduces the duty cycle of the signal, The regulation generator detects when the current value is below a safety threshold and restores the duty cycle of the signal.

[0037] The current sampling unit converts the motor current into an electrical signal and monitors the operating current.

[0038] The processor includes:

[0039] A comparator for comparing the motor current with a preset threshold to determine whether to trigger the protection mechanism.

[0040] A storage unit for recording the historical operating data of the motor.

[0041] A communication interface for exchanging data with other devices or control systems.

[0042] The switching device disconnects the connection between the motor and the power supply when the protection mechanism is triggered.

[0043] The automatic recovery unit includes a delay circuit for delaying for a period of time before restoring the normal operating voltage of the motor.

[0044] In this embodiment, when the processor detects that the motor current exceeds the preset threshold, the protection mechanism is triggered. At this time, the processor connects the regulation generator to reduce the duty cycle of the signal, reduce the power supply of the motor, or even cut off the connection between the motor and the power supply to prevent the motor from overheating. Then the delay circuit in the automatic recovery unit starts timing and waits for a certain period of time. This period of time is to ensure that the motor has enough cooling time to prevent the motor from continuing to overheat after the overload is removed. After the delay ends, the processor will check again whether the motor current has dropped below the safety threshold. If the current is still higher than the threshold, the delay circuit will continue to time. Otherwise, the processor will consider that the overload has been eliminated. When the processor confirms that the overload has been eliminated and the motor has cooled to a safe level, it will connect the regulation generator to gradually increase The duty cycle of the signal restores the normal operating voltage of the motor, and if the connection between the motor and the power supply was previously cut, the connection is now also re-closed to restore normal operation of the motor.

[0045] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A motor stall protection processing system, characterized in that: include: A motor interface for connecting a motor and a power source; one Adjustment generator, used to generate adjustable Signal, Regulation Signal duty cycle; A current sampling unit for real-time monitoring of the motor's operating current; a processor for receiving data from the current sampling module and determining whether to trigger a protection mechanism based on a preset threshold; a switching device for disconnecting the motor from the power supply when the protection mechanism is triggered; An automatic recovery unit is used to automatically restore the normal operating voltage of the motor when the current value drops below a safety threshold.

2. The motor stall protection processing system according to claim 1, characterized in that: The motor interface includes a relay to control the on and off of the motor power supply.

3. The motor stall protection processing system according to claim 1, characterized in that: described When the regulation generator detects motor overload, it reduces The duty cycle of the signal, the When the regulating generator detects that the current value is lower than the safety threshold, it recovers The duty cycle of the signal.

4. The motor stall protection processing system according to claim 1, characterized in that: The current sampling unit converts the motor current into an electrical signal and monitors the operating current.

5. The motor stall protection processing system according to claim 1, characterized in that: The processor includes: A comparator that compares the motor current with a preset threshold to determine whether to trigger the protection mechanism; A storage unit for recording historical operating data of the motor; A communication interface for exchanging data with external devices or control systems.

6. The motor stall protection processing system according to claim 5, characterized in that: The switch device disconnects the motor from the power supply when the protection mechanism is triggered.

7. The motor stall protection processing system according to claim 1, characterized in that: The automatic recovery unit includes a delay circuit for recovering the normal operating voltage of the motor after a delay of a period of time.

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