Comments on: Solar panel and motor: Any way to regulate the power transmission? http://www.solar-empire.net/solar-panel/solar-panel-and-motor-any-way-to-regulate-the-power-transmission Sat, 04 Feb 2012 09:01:59 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Chris P http://www.solar-empire.net/solar-panel/solar-panel-and-motor-any-way-to-regulate-the-power-transmission/comment-page-1#comment-3357 Chris P Thu, 11 Mar 2010 19:05:59 +0000 http://www.solar-empire.net/solar-panel/solar-panel-and-motor-any-way-to-regulate-the-power-transmission#comment-3357 I assume it is a DC motor. You should have DC voltage coming out of the solar cell (For example 10V). You could use a transistor to switch the voltage on and off, then filter the output with an RC filter. You will have to choose the right RC time constant . It will have to be slower than the control pulse frequency, but faster than the desired motor response time. If you switched the voltage with a 50% duty cycle, then filtered the output, you would get 5V, with a 75% duty cycle, you would get 7.5V, etc. Therefore, you could control the motor by controlling the duty cycle of the switching. A microcontroller like the BASIC Stamp can produce the control pulses.<br><b>References : </b><br> I assume it is a DC motor. You should have DC voltage coming out of the solar cell (For example 10V). You could use a transistor to switch the voltage on and off, then filter the output with an RC filter. You will have to choose the right RC time constant . It will have to be slower than the control pulse frequency, but faster than the desired motor response time.

If you switched the voltage with a 50% duty cycle, then filtered the output, you would get 5V, with a 75% duty cycle, you would get 7.5V, etc. Therefore, you could control the motor by controlling the duty cycle of the switching. A microcontroller like the BASIC Stamp can produce the control pulses.
References :

]]>