1. What is VF controlFor asynchronous motors, in order to ensure that the motor flux and output force remain unchanged (constant torque). When the motor changes frequency, the ratio of voltage V and frequency F needs to be maintained approximately unchanged. This method is what we called constant vo

In what ways does the inverter protect the motor?1 Overvoltage protectionThe output of the inverter has a voltage detection function, and the inverter can automatically adjust the output voltage so that the motor does not suffer from overvoltage. Even when the output voltage adjustment fails and the

In production automation and buildings, there are a large number of fans and pumps, and for cost consideration, buttons and thermal relays are commonly used as control and protection components.

From the fluid mechanics P(power) = Q(flow) ╳ H(pressure), it can be deduced that the power consumption of the pump motor and the rotational speed is approximated by the relationship of cubed ratio. For example a pump motor power is 55KW, When the speed drops to 4/5 of the original speed, its power