The Magimix Induction Motor
You will more than likely have noticed that some food processors are markedly noisier than others. This is due mainly to the type of electric motor used to drive the spindle.
Budget food processors are almost always fitted with what is known as a “universal” electric motor.
Vacuum cleaners, circular saws and electric drills are also commonly fitted with universal electric motors. This type of motor is referred to as “universal” because it can be configured universally to be driven by either DC or AC (mains) electricity.
The universal electric motor is inherently noisy. This is due to the way it is constructed and the manner in which it operates.
A typical universal electric motor spins at around 15,000 rpm with carbon brushes in constant contact with a slotted copper armature. Whilst this all sounds very ‘techie’, in essence this type of electric motor configuration results in the familiar high-pitched whine and whistle we commonly associate with the majority of electric motor driven devices.
Additionally, electric appliances fitted with universal motors generally use a mechanical gearbox to transfer power from the motor to the drive shaft, thereby adding to the overall noise.
Every Magimix food processor is fitted with an induction motor.
An induction motor runs on AC power only and does not use the brush and armature configuration of universal motors in its construction.
In fact there are very few parts in contact with any other part inside an induction motor, as it essentially employs an electro-magnetic field to get it up to speed. This by its very nature keeps the motor quiet and less prone to failure, breakdown or burn out… no doubt the main reason why Magimix are comfortable with their 12 year motor warranty.
The one downside to an induction motor is its weight. The difference in weight can be considerable when comparing like for like. A circular saw or power drill fitted with an induction motor would be unmanageable to lift and equally difficult to hold steady, to the point of being unusable and dangerous.
However, a weighty motor in a food processor – around 10kg (the normal weight of a 1 year old child) in the case of Magimix food processors – is not at all a bad thing, since it reduces vibration to almost nothing, thereby eliminating any tendency to ‘creep’ across the worktop.
Almost certainly the quietest electric appliances in our homes are fitted with induction motors – fridges and ceiling fans come immediately to mind. The noisy ones aren’t!
I do hope this short introduction to induction motors has been useful and informative.