The electric vehicle speedometer is a commonly used electromagnetic speedometer. The voltage speedometer is used for voltage protection and control of the electric drive system. The coil of the voltage speedometer is connected to the main circuit in parallel to sense the line voltage of the main circuit; the contact is connected to the control circuit and is the actuator.

The speedometer of electric vehicles is generally composed of integrated circuits. After the measured alternating current passes through the isolating AC device, a voltage U1 that is proportional to the measured current will be obtained.

After the fixed value setting treatment, rectification is performed. After the rectified voltage passes through the filter, a DC voltage U0 proportional to U1 will be obtained. Then the DC voltage is compared with the DC reference voltage. If the reference voltage is higher than the DC voltage, the The level detector will output a positive signal to make the speedometer in a working state.

The coil of the electric vehicle speedometer is connected in series with the load to reflect the load current, so its coil has a small number of turns and a thick wire, so that the voltage drop when passing the current is small and will not affect the current of the load circuit. The coil of the voltage speedometer is connected in parallel with the load to reflect the load voltage. The coil has many turns and the wire is thin. The electric vehicle speedometer mainly realizes the protection of the components through the overcurrent protection action. The electric vehicle speedometer uses its own measuring element to determine whether the current through the line exceeds the standard. The time speedometer is used as a delay element to ensure that the device action is selective with an appropriate delay. At the same time, the signal speedometer is used to send out protection actions. signal. The electric vehicle speedometer mainly uses digital switches to set the current value, which is intuitive and convenient. Changing the setting value does not require inspection. The setting range is 2-9.9A with a difference of 0.1A; high accuracy, low power consumption, fast action time, and high return coefficient.

YC has strong technical force, production facilities, laboratories and testing facilities, and is one of the professional motorcycle parts and accessories Suppliers. We have achieved an annual production and sales of 4 million electric motorcycle speedometers. We would be happy to discuss your requirements for the speedometer. Our experts will provide you with reasonable suggestions for the best products according to your needs.