Current detection device

Abstract

The invention relates to a current detection device which comprises a first resistor, an isolator and a processor, wherein a driver provides current to a motor by the resistor so as to drive the motor; the isolator is connected with both ends of the first resistor, is used for receiving a potential difference generated by the current flowing through the first resistor and outputs an isolation signal after the isolator isolates and amplifies the potential difference; and the processor is connected with the isolator and is used for receiving the isolation signal for the processing of the processor so as to detect the current provided by the driver of the motor to the motor. The current detection device has higher accuracy and lower cost.

Description

technical field [0001] The invention relates to a detection device, in particular to a current detection device. Background technique [0002] In the prior art, a current sensor is generally used to detect the current supplied to the motor by the motor driver, and the current detection range of the used current sensor is a fixed integer value, such as 5A, 10A, 20A, 30A, 50A and so on. Therefore, in the actual current detection, there will be a problem of excessive selection of the detection range. For example, when measuring a current of about 24A, a current sensor with a measurement range of more than 30A must be selected, which will make the measurement accuracy insufficient. In addition, there are relatively few current sensors on the market for detecting currents below 1A, and the prices are relatively expensive, which brings inconvenience to users and increases the cost burden. Contents of the invention [0003] In view of the above, it is necessary to provide a high...

AI Technical Summary

Problems solved by technology

Therefore, in the actual current detection, there will be a problem of excessive selection of the detection range. For example, when measuring a current of about 24A, it is necessary to use a current sensor with a measurement range of more than 30A, which will make the measurement accuracy insufficient.

In addition, there are relatively few current sensors on the market for detecting currents below 1A, and the prices are relatively expensive, which brings inconvenience to users and increases the cost burden.

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