calculation
is for example 100V amplitude and duty cycle square wave signal is 0.5, if, on the average, its voltage is only 50V , and by calculating the root mean square value there 70.71V. Why is this?
In one example, a group of 100-volt battery, the power supply stop after 10 minutes of each 10 minutes, that is to say half the duty cycle. If the battery pack is driven 10Ω resistor 10 minutes to generate the supply current of 10A and 1000W power, current and power when the power is zero. So in a period of 20 minutes with an average power of 500W, which is equivalent to 70.71V DC power generated by the power 10Ω resistor. And 50V DC supply voltage to the resistance of 10Ω can only produce a power of 250W. For motors and transformers, as long as the RMS current does not exceed the rated current, overload even within a certain time, it will not burn. FIG PMTS1.0 pumping power tester test to calculate the current, voltage and power are by effective values of current and voltage waveform distortion will not be uncertainty. This is particularly useful for testing inverter drives the motor.
formula
method for finding the root mean square value of the sinusoidal signal