papaisou11
Member level 2
Hello,
Greeting to all.
I am having difficulties to measure PWM based motor control circuit power measurement.
Let me explain further. I have a motor that can be controlled by varying DC voltage across the motor or using PWM based signal. I want to make a comparision between How much power in the driver (Including motor obviously) required if I control the motor using DC Voltage vs controlled using PWM Duty cycle.
The PWM frequency is 25Hz.
I could use 100% duty cycle constant in all cases and vary the Motor voltage where the speed is changing. In such case I recorded the Input voltage and current input of the device at different speed sucessfully using normal DC current measurement.
After that, I want to find the point in what duty cycle the motor is getting that speeds where the voltage is at its highest the motor could recive and measure the current and voltage. Since the PWM frequency is low, the voltage and current getting flactuated too much to take proper measurement.
What is the best way to measure the current and the voltage when the PWM duty cycle is 40% or say 65%, 75% and goes on upto 99%.
I have Oscope, True RMS multimeter - METRAVI XB-33CF.
Thanks a lot.
Greeting to all.
I am having difficulties to measure PWM based motor control circuit power measurement.
Let me explain further. I have a motor that can be controlled by varying DC voltage across the motor or using PWM based signal. I want to make a comparision between How much power in the driver (Including motor obviously) required if I control the motor using DC Voltage vs controlled using PWM Duty cycle.
The PWM frequency is 25Hz.
I could use 100% duty cycle constant in all cases and vary the Motor voltage where the speed is changing. In such case I recorded the Input voltage and current input of the device at different speed sucessfully using normal DC current measurement.
After that, I want to find the point in what duty cycle the motor is getting that speeds where the voltage is at its highest the motor could recive and measure the current and voltage. Since the PWM frequency is low, the voltage and current getting flactuated too much to take proper measurement.
What is the best way to measure the current and the voltage when the PWM duty cycle is 40% or say 65%, 75% and goes on upto 99%.
I have Oscope, True RMS multimeter - METRAVI XB-33CF.
Thanks a lot.