Another complementary set of ME: bezkomutatorowy electric motor is a transistor famously - educational, but its power is sufficient to drive the mechanical toys.
The design allows for experimentation:
- apply power transistor (eg, BD 355) greatly increases the power of an electric motor,
- no-load (Full load) transistor ASY34 is still cold, light engine load makes it begins to heat up strongly,
- 20K potentiometer is used to determine the excitation voltage (setting the operating point of the transistor) and smoothly regulates the turnover
- power transistor (especially cooled ) allows you to bear the power supply to at least 12V, thereby increasing the power and speed, can be used
- PNP and NPN transistors - pay attention to the polarity of the power
- for more experienced engine makes it possible to experiment with other systems control: for example, by using thyristors,
- course, our engine works "in reverse" - can operate as a generator: for example, connect the work coil LED.
construction few notes:
- pay particular attention to the balance of the rotor and the correct glue magnets on the axis - the engine reaches a very large volume (of the order of tens of thousands) and the centrifugal force can cause disruption of the rotor!
- engine should not be installed (set) on the board used to lay magnetic circuits e - a distortion which causes sheet on the table will prevent the engine performance
- from this because we avoid the construction of any portion of ferromagnetic materials - ferrous metal screws that hold the rotor bearings b. affect adversely on his work - best to use brass screws.
Tiny motor (unfortunately) requires you to manually start : potentiometer is set to "0" and just
; touches the rotor to move.
If the engine does not want to work must change the polarity of the coil excitation.
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