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Self-starting method of stalled motor and outage and self-starting control circuit

A technology of motor stalling and control logic circuit, which is applied in the direction of motor generator/starter, emergency protection circuit device, electrical components, etc., to save energy and ensure the effect of life

Active Publication Date: 2015-03-04
中山市普阳电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after a stall is generally detected, a direct stop scheme is adopted for protection, such as the Chinese patent ZL200910212059.6 "Control and Protection Circuit for Ground Brush Motor Stall", which cannot automatically start while protecting the motor

Method used

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  • Self-starting method of stalled motor and outage and self-starting control circuit
  • Self-starting method of stalled motor and outage and self-starting control circuit
  • Self-starting method of stalled motor and outage and self-starting control circuit

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Embodiment Construction

[0025] refer to figure 1 According to the present invention, the motor lock-up power-off and self-starting control circuit is composed of a first comparison and quantization circuit, a second comparison and quantization circuit, a self-start trigger circuit, a control logic circuit, a voltage-stabilized power supply circuit, a pre-drive circuit and a drive circuit.

[0026] The structural relationship and working principle between these circuits are as follows: the first comparison and quantization circuit is used for signal feedback from the drive circuit, which is compared and quantized with its own signal and then input to the second comparison and quantization circuit; an external capacitor is connected to the first comparison and quantization circuit. After the quantization circuit is grounded, the first comparison and quantization circuit controls the external capacitor to discharge and charge, so as to obtain a zero current period lasting for 6-8 seconds;

[0027] ...

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Abstract

The invention discloses a self-starting method of a stalled motor and a control circuit. The self-starting method comprises the following steps: step 1, when a motor is stalled, a control logic circuit of the motor controls and cuts off the output of a predrive circuit so that the motor is at a zero-current state which lasts for 6-8 seconds; step 2, the control logic circuit of the motor controls the predrive circuit to work and outputs starting current which lasts for 1-2 seconds to start the motor; and the step 1 and the step 2 are repeated until a rotary shaft of the motor is released. According to the self-starting method of the stalled motor and the control circuit, the energy source can be effectively saved; the motor does not continuously emit heat and an electric element and a coil inside the motor are not burnt out due to too high temperature; the motor can be effectively protected and the service life is ensured; and finally, automatic starting and normal operation can be realized.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a self-starting method after a motor is blocked, and a control circuit for power-off and self-starting when the motor is blocked. Background technique [0002] Motors are widely used in various fields, such as fans, electric vehicles, elevators and so on. It is a common phenomenon that the motor is blocked due to the resistance of the rotating shaft. For traditional motors, after the rotor is locked, there is always current in the wind turbine and the locked rotor current is larger than the running current. At this time, the power of the motor increases and the power consumption increases. Due to the high current after the locked rotor, the motor will generate a lot of heat. When the temperature is too high, the motor coil will burn out; in severe cases, it may cause a fire. [0003] At present, in the prior art, there are many motor stall detection schemes, such as Chinese patent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P1/16H02H7/08
Inventor 何国涛马得发曾庆栋
Owner 中山市普阳电子科技有限公司