This is what rechargeable vacuum cleaners are claiming to have?

Right you lot, out of my way, this is my field.

Never heard of one, bob.

:)

It’ll be some marketing dickwads idea. I assume it will just be some for of pulse width modulation drive, although I could be well wrong.

They’re talking brushless motors with digitally generated pulses replacing the brush/commutator make & break arrangement.

Just like model boat/aircraft/car devotees use, only bigger. Control the frequency of the pulses, control the speed.

sibeen said:

Right you lot, out of my way, this is my field.

Never heard of one, bob.

:)

It’ll be some marketing dickwads idea. I assume it will just be some for of pulse width modulation drive, although I could be well wrong.

This is why they pay u the big bucks…:)

never heard of digital motors but what geoff said makes sense

theres something called pulse width modulation

its where current is fed to the windings via an electronic cicuit

the circuit feeds current in : ON

the cicuit stops the feed : OFF

if the circuit spends more time on than off the faster the motor goes.

its a way of controlling the speed of the motor

simpler motors might use a speed control by having different numbers of magnetic poles

there are different motors to do different types of jobs, if the load on the motor is high you’d want somethign that has high torque for example. lower loads such as fans in a hair dryer don’t need this high torque but instead need high RPMs.

wookiemeister said:

never heard of digital motors but what geoff said makes sense

theres something called pulse width modulation

its where current is fed to the windings via an electronic cicuit

the circuit feeds current in : ON

the cicuit stops the feed : OFF

if the circuit spends more time on than off the faster the motor goes.

its a way of controlling the speed of the motor

simpler motors might use a speed control by having different numbers of magnetic poles

there are different motors to do different types of jobs, if the load on the motor is high you’d want somethign that has high torque for example. lower loads such as fans in a hair dryer don’t need this high torque but instead need high RPMs.

it is how the motor in your quartz analog watch works..

roughbarked said:

wookiemeister said:

never heard of digital motors but what geoff said makes sense

theres something called pulse width modulation

its where current is fed to the windings via an electronic cicuit

the circuit feeds current in : ON

the cicuit stops the feed : OFF

if the circuit spends more time on than off the faster the motor goes.

its a way of controlling the speed of the motor

simpler motors might use a speed control by having different numbers of magnetic poles

there are different motors to do different types of jobs, if the load on the motor is high you’d want somethign that has high torque for example. lower loads such as fans in a hair dryer don’t need this high torque but instead need high RPMs.

it is how the motor in your quartz analog watch works..

i would have thought it was a stepper motor

the quartz part would be the oscillation and measurement of time itself by thr brain and the stepper motor would be delivering that information to the dial.

wookiemeister said:

roughbarked said:

wookiemeister said:

never heard of digital motors but what geoff said makes sense

theres something called pulse width modulation

its where current is fed to the windings via an electronic cicuit

the circuit feeds current in : ON

the cicuit stops the feed : OFF

if the circuit spends more time on than off the faster the motor goes.

its a way of controlling the speed of the motor

simpler motors might use a speed control by having different numbers of magnetic poles

there are different motors to do different types of jobs, if the load on the motor is high you’d want somethign that has high torque for example. lower loads such as fans in a hair dryer don’t need this high torque but instead need high RPMs.

it is how the motor in your quartz analog watch works..

i would have thought it was a stepper motor

the quartz part would be the oscillation and measurement of time itself by thr brain and the stepper motor would be delivering that information to the dial.

yep it is a stepper motor and yep the oscillation is done in a quartz crystal, the pulses are organized by the ‘brain’. A wheel train divides the motion into hours minutes and seconds.. as well as days and date.

I am pretty sure that there is a form of very small electric motor that works something like a stepper motor, but has and oscillating disc instead of a rotor.

I got hints from from the Dyson site and added what I know from my RC model boat building cousin and his mad mates (Dyson seem to be the only ones using this terminology).

roughbarked said:

wookiemeister said:

roughbarked said:

it is how the motor in your quartz analog watch works..

i would have thought it was a stepper motor

the quartz part would be the oscillation and measurement of time itself by thr brain and the stepper motor would be delivering that information to the dial.

yep it is a stepper motor and yep the oscillation is done in a quartz crystal, the pulses are organized by the ‘brain’. A wheel train divides the motion into hours minutes and seconds.. as well as days and date.

i tend to just use the term “the brain” for anything that “thinks”, its good for microcontrollers, plcs, motherboards, pics any control circuit etc etc

its immediately understood by anyone

wookiemeister said:

roughbarked said:

wookiemeister said:

i would have thought it was a stepper motor

the quartz part would be the oscillation and measurement of time itself by thr brain and the stepper motor would be delivering that information to the dial.

yep it is a stepper motor and yep the oscillation is done in a quartz crystal, the pulses are organized by the ‘brain’. A wheel train divides the motion into hours minutes and seconds.. as well as days and date.

i tend to just use the term “the brain” for anything that “thinks”, its good for microcontrollers, plcs, motherboards, pics any control circuit etc etc

its immediately understood by anyone

of course “the brain” might be applied to an entire control system rather than a motherboard

eg the brains of the powerstation – the control system that takes in, monitors and acts upon information being delivered to it

wookiemeister said:

roughbarked said:

wookiemeister said:

i would have thought it was a stepper motor

the quartz part would be the oscillation and measurement of time itself by thr brain and the stepper motor would be delivering that information to the dial.

yep it is a stepper motor and yep the oscillation is done in a quartz crystal, the pulses are organized by the ‘brain’. A wheel train divides the motion into hours minutes and seconds.. as well as days and date.

i tend to just use the term “the brain” for anything that “thinks”, its good for microcontrollers, plcs, motherboards, pics any control circuit etc etc

its immediately understood by anyone

Most people these days know that it is the circuit that does all the eductaed thinking and that without it.. the device is useless.. so ‘brain’ works.. yeah.