An analog device, like a human or an analog meter, will see an 'average' voltage at the output of a pulse modulated voltage/speed controller. But a device that sees in micro-seconds, like the windings of a motor, will always see full voltage, and needs to be able to handle it. Household light bulbs are slow reacting devices. There is a lot of latency of light. If you were to control one with pulse modulation the eye sees dimming, the filament of the bulb sees frequent on and off at full voltage. A rheostat actually varies voltage, a PWM does not.
In a closed loop circuit, when it is being pulsed to control speed, the entire circuit is being pulsed, regardless of whether parts of the circuit are in series or parallel. I am not an electrical engineer, but I believe a MOSFET controller is still just a pulse width modulation controller; MOSFET being the type of component being used at the output stage.
Unless multiple controllers, in series, parallel or a combination, are in some way synchronized I don't see how it can work. They would each pulse the circuit based on an external unsynchronized control (5K pot, etc..). Seems like you could get anything from always on to always off depending on what each controller is doing in the instant.
This is how I understand it. Take all of this with a grain of salt. I am not an expert.
In a closed loop circuit, when it is being pulsed to control speed, the entire circuit is being pulsed, regardless of whether parts of the circuit are in series or parallel. I am not an electrical engineer, but I believe a MOSFET controller is still just a pulse width modulation controller; MOSFET being the type of component being used at the output stage.
Unless multiple controllers, in series, parallel or a combination, are in some way synchronized I don't see how it can work. They would each pulse the circuit based on an external unsynchronized control (5K pot, etc..). Seems like you could get anything from always on to always off depending on what each controller is doing in the instant.
This is how I understand it. Take all of this with a grain of salt. I am not an expert.
To affect the quality of the day, that is the highest of arts. ThoreauOn 07/03/2014 10:40 AM, jortlif@msn.com [electricboats] wrote:
Thanks- fully understand the smoke issue . I plan not go exceed the amp ratings of the controller. The real issue is- does a MOSFET controller put out a signal that is like a voltage controlled battery. I know it is pulsed but there is an equivalent average voltage - sort of like a household dimmer switch. If it's like a battery then they can be paralleled ( with matched settings) or Put in series with another controller or additional battery. Again the current limits will be observed. Any thoughts ?
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Posted by: Yahzdi <yahzdi@pointroberts.net>
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