Overvoltage and undervoltage protection system
An undervoltage protection and overvoltage technology, which is applied in the direction of protection against overvoltage, protection against undervoltage or no voltage, emergency protection circuit devices, etc., can solve the problem of motor component burnout and motor failure. Normal and other issues
Inactive Publication Date: 2010-05-26
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology
[0002] The existing power supply system, such as a motor drive power supply system, needs to provide a stable working voltage to the motor to ensure the normal operation of the motor. If the working voltage received by the motor is too high or too low, it will cause the motor to work abnormally, and even cause The components of the motor are burned, so in order to ensure the performance and service life of the motor, it is particularly important to protect it from overvoltage and undervoltage
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[0007] Such as figure 1 As shown, the preferred embodiment of the overvoltage and undervoltage protection system of the present invention includes an AC power supply 80, a voltage converter 90, a voltage divider circuit 100, two amplifiers 102 and 114, a comparison device 104, and a controller 106 , a switch controller 108 , a switch 110 , a load such as a motor 112 and a display 116 .
[0008] The AC power supply 80 is used to supply power to the motor 112, and is also used to convert a DC input voltage Vin to the voltage divider circuit 100 through the voltage converter 90, and the voltage divider circuit 100 is used to receive the The direct current input voltage Vin is divided and the input voltage Vin is divided to output a divided voltage for the amplifier 102 .
[0009] The amplifier 102 is used for receiving the divided voltage output by the voltage dividing circuit 100 , and proportionally adjusting the divided voltage to provide an adjusted voltage to the comparing ...
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The invention relates to an overvoltage and undervoltage protection system which is used for protecting a load and comprises a comparison device, a controller, a switch controller and a switch, wherein the comparison device is used for receiving an input voltage and comparing the input voltage with a preset voltage, outputs an overvoltage signal and provides the overvoltage signal for the switch controller by the controller if the input voltage is higher than the preset voltage, outputs an undervoltage signal and provides the undervoltage signal to the switch controller if the input voltage is lower than the preset voltage; and the switch controller outputs a stopping signal according to the received overvoltage signal or undervoltage signal so as to close the switch and further enable the load to stop working. The overvoltage and undervoltage protection system can judge the overhigh or overlow voltage provided for the load, and enables the load to stop working, thereby protecting the load from being damaged.
Description
technical field [0001] The invention relates to an overvoltage and undervoltage protection system. Background technique [0002] The existing power supply system, such as a motor drive power supply system, needs to provide a stable working voltage to the motor to ensure the normal operation of the motor. If the working voltage received by the motor is too high or too low, it will cause the motor to work abnormally, and even cause The components of the motor are burned, so in order to ensure the performance and service life of the motor, it is particularly important to protect it from overvoltage and undervoltage. Contents of the invention [0003] In view of the above, it is necessary to provide an over-voltage and under-voltage protection system, which can judge the over-high or under-voltage supplied to the load and stop the load, so as to protect the load from damage. [0004] An overvoltage and undervoltage protection system for protecting a load, comprising a compari...
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IPC IPC(8): H02H7/08H02H3/20H02H3/24
CPCH02H3/207H02H7/09
Inventor 李建玄
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD