electronic speed control

[Dave OwenParticipant @daveowen98685]

interesting, not really thought about resistors, i assumed an electronic version would be more efficient and reliable. i can see a heavy duty resistor would be more reliable, what about acceleration? would there be a jump or surge as i go faster? switching between resistor value`s.

If i was running at low speeds would i be wasting a lot of battery power?

my limited use of resitor boards was many years ago with model boats and they were a bit brutal with very little control at low speed.

cheers

Dave

[Dave OwenParticipant @daveowen98685]

interesting, not really thought about resistors, i assumed an electronic version would be more efficient and reliable. i can see a heavy duty resistor would be more reliable, what about acceleration? would there be a jump or surge as i go faster? switching between resistor value`s.

If i was running at low speeds would i be wasting a lot of battery power?

my limited use of resitor boards was many years ago with model boats and they were a bit brutal with very little control at low speed.

cheers

Dave

[Ian S CParticipant @iansc]

I use resistors to control the speed on the power feed on my vertical milling machine, it uses a car windscreen wiper motor, as I have it, it only has 3 speeds, but that suits me fine. There seems little or no loss of power at low speed, the input voltage is 17V. Ian S C

[Ian S CParticipant @iansc]

I use resistors to control the speed on the power feed on my vertical milling machine, it uses a car windscreen wiper motor, as I have it, it only has 3 speeds, but that suits me fine. There seems little or no loss of power at low speed, the input voltage is 17V. Ian S C

[Ian S CParticipant @iansc]

I use resistors to control the speed on the power feed on my vertical milling machine, it uses a car windscreen wiper motor, as I have it, it only has 3 speeds, but that suits me fine. There seems little or no loss of power at low speed, the input voltage is 17V. Ian S C

[Ian S CParticipant @iansc]

I use a resistor speed control on the power feed of my vertical milling machine, it is 3 speed, a windscreen wiper motor, with an input voltage of 17V, works OK for me, been using it for about 15 years. Ian S C

[Ian S CParticipant @iansc]

I use a resistor speed control on the power feed of my vertical milling machine, it is 3 speed, a windscreen wiper motor, with an input voltage of 17V, works OK for me, been using it for about 15 years. Ian S C

[Ian S CParticipant @iansc]

I use a resistor speed control on the power feed of my vertical milling machine, it is 3 speed, a windscreen wiper motor, with an input voltage of 17V, works OK for me, been using it for about 15 years. Ian S C

[I.M. OUTAHEREParticipant @i-m-outahere]

Hi Dave ,

I purchased a 1200w unit from monster scooters thru ebay and fitted it to a golf trike for my nephews little one and it has been fine for near 12 months .

This unit did not have reverse but a relay fixed this .

I think they sell units with this feature but shop around .

They use a twist grip throttle but im not sure if they are a variable resistor or some form of rotary encoder as i bought the throttle unit at the same time and didn't bother to play with it .

I payed around $100 au delivered and this was at least 1/3 the cost of the original unit so i was happy !

No connection to them just a happy customer and for lower powered units i have a local supplier that is also good value .

Ian

[I.M. OUTAHEREParticipant @i-m-outahere]

Hi Dave ,

I purchased a 1200w unit from monster scooters thru ebay and fitted it to a golf trike for my nephews little one and it has been fine for near 12 months .

This unit did not have reverse but a relay fixed this .

I think they sell units with this feature but shop around .

They use a twist grip throttle but im not sure if they are a variable resistor or some form of rotary encoder as i bought the throttle unit at the same time and didn't bother to play with it .

I payed around $100 au delivered and this was at least 1/3 the cost of the original unit so i was happy !

No connection to them just a happy customer and for lower powered units i have a local supplier that is also good value .

Ian

[I.M. OUTAHEREParticipant @i-m-outahere]

Hi Dave ,

I purchased a 1200w unit from monster scooters thru ebay and fitted it to a golf trike for my nephews little one and it has been fine for near 12 months .

This unit did not have reverse but a relay fixed this .

I think they sell units with this feature but shop around .

They use a twist grip throttle but im not sure if they are a variable resistor or some form of rotary encoder as i bought the throttle unit at the same time and didn't bother to play with it .

I payed around $100 au delivered and this was at least 1/3 the cost of the original unit so i was happy !

No connection to them just a happy customer and for lower powered units i have a local supplier that is also good value .

Ian

[MICHAEL WILLIAMSParticipant @michaelwilliams41215]

ADY1 – well said . Not specifically about the backgear but the general principle you suggest is perfectly sound .

In most design jobs there are usually many alternative solutions possible . Each solution identified is evaluated – even if its only for 10 seconds each one – and then the much smaller number of potentially good solutions is looked at more closely .

The engineers skill is in finding the simplest solution that will actually do the task reliably .

It is often the case that a very simple solution with some compromises in performance beats a more complex solution with few compromises in performance . Depends on the application and who's paying the bill .

Dave O –

I'll attempt to answer some of your questions but first could you let me know how many motors you propose using and if you've any particular motors in mind then some of the details .

Michael Williams .

[MICHAEL WILLIAMSParticipant @michaelwilliams41215]

ADY1 – well said . Not specifically about the backgear but the general principle you suggest is perfectly sound .

In most design jobs there are usually many alternative solutions possible . Each solution identified is evaluated – even if its only for 10 seconds each one – and then the much smaller number of potentially good solutions is looked at more closely .

The engineers skill is in finding the simplest solution that will actually do the task reliably .

It is often the case that a very simple solution with some compromises in performance beats a more complex solution with few compromises in performance . Depends on the application and who's paying the bill .

Dave O –

I'll attempt to answer some of your questions but first could you let me know how many motors you propose using and if you've any particular motors in mind then some of the details .

Michael Williams .

[MICHAEL WILLIAMSParticipant @michaelwilliams41215]

ADY1 – well said . Not specifically about the backgear but the general principle you suggest is perfectly sound .

In most design jobs there are usually many alternative solutions possible . Each solution identified is evaluated – even if its only for 10 seconds each one – and then the much smaller number of potentially good solutions is looked at more closely .

The engineers skill is in finding the simplest solution that will actually do the task reliably .

It is often the case that a very simple solution with some compromises in performance beats a more complex solution with few compromises in performance . Depends on the application and who's paying the bill .

Dave O –

I'll attempt to answer some of your questions but first could you let me know how many motors you propose using and if you've any particular motors in mind then some of the details .

Michael Williams .

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