Nowadays, with the increasing number of electric devices in people's lives, the electricity consumption is also on the rise. Then the power protection of electrical equipment has been paid attention to, the use of more is the power supply voltage sensor. What does the supply voltage sensor do?
What is the power supply voltage sensor?
The power supply voltage sensor is a device that converts the measured electric quantity parameters into DC current and DC voltage and outputs analog signal or digital signal separately. The voltage sensor is used to measure the voltage or current signal with serious waveform distortion in the power grid, and it can also measure the non-sinusoidal waveform such as square wave and triangle wave.
Two, what is the role of the power supply voltage sensor?
Role one: The supply voltage sensor can feel the measured voltage and convert it into usable output signals. In a variety of detection and control systems, it is often necessary to take the high-speed variable AC and DC voltage signals as tracking acquisition, and make spectrum analysis for the more complex voltage waveform.
Normally, this type of signal is a strong voltage with high voltage and current, or it can be a weak point signal with poor load capacity. Then we can use the power supply voltage sensor to collect these voltage signals that cannot be directly measured or mismatched to obtain a standardized and electrically isolated voltage signal.
Role two: The supply voltage sensor can also be a sensing element, which is to use a supply voltage sensor to reduce the measured voltage to a low voltage that can be used. Then the measured voltage is transformed into A linear DC voltage through the related circuit and is sent to the data acquisition system and A/D converter.
If the measured voltage is a DC voltage, the supply voltage sensor can use partial voltage resistance as the sensing element. The resistance value at both ends of the measured element in parallel should be large enough to reduce the influence of the loss caused by the circuit current on the measured value as much as possible. For the low-voltage motor, it should be around 10kω. A part of the voltage drop of the measured voltage across the resistor is taken as A signal, which is directly fed into the data acquisition system and A/D converter.